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A General Method to Compute the Electric Flux Lines between Two Magnet Wires in Close Contact and Its Application for the Evaluation of Partial Discharge Risks in the Slots of Electric Machines Embedded in Future Transportation Systems 认领
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作者 Philippe Collin David Malec Yvan Lefevre 《航空科学与技术(英文)》 2021年第1期24-42,共19页
The sizing of the Electrical Insulation System (EIS) is an important challenge in electric motors of higher specific </span><span style="font-family:Verdana;">power driven</span><span st... The sizing of the Electrical Insulation System (EIS) is an important challenge in electric motors of higher specific </span><span style="font-family:Verdana;">power driven</span><span style="font-family:Verdana;"> by faster inverters. That keeps increasing the electric stress </span><span style="font-family:Verdana;">which</span><span style="font-family:Verdana;"> the winding is submitted in the stator slot. Consequently, Partial Discharges (PD) are more likely to occur. Nowadays, </span><span style="font-family:Verdana;">the Paschen’s</span><span style="font-family:Verdana;"> criterion is widely used to evaluate the risk of partial discharge. It requires </span><span style="font-family:Verdana;">the knowledge</span><span style="font-family:Verdana;"> of electric field lines. This paper presents a method to precisely compute the electric field lines in a two-dimensional (2D) electrostatic problem. The field of study is composed of two magnet wires in close contact. Such configuration is representative of the </span><span style="font-family:Verdana;">turn</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">to</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">turn</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> interaction in an electric motor slot. The problem is solved using the scalar potential formulation only. The notion of flux tubes is used </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">for the </span></span></span><span style="font-family:Verdana;"><span st 展开更多
关键词 Partial Discharges Dielectric Constant Electric Motor Finite Elements Paschen’s Criterion Ballistic Method
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Physics-Aware Deep Learning on Multiphase Flow Problems 认领
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作者 Zipeng Lin 《通讯与网络(英文)》 2021年第1期1-11,共11页
In this article, a physics aware deep learning model is introduced for multiphase flow problems. The deep learning model is shown to be capable of capturing complex physics phenomena such as saturation front, which is... In this article, a physics aware deep learning model is introduced for multiphase flow problems. The deep learning model is shown to be capable of capturing complex physics phenomena such as saturation front, which is even challenging for numerical solvers due to the instability. We display the preciseness of the solution domain delivered by deep learning models and the low cost of deploying this model for complex physics problems, showing the versatile character of this method and bringing it to new areas. This will require more allocation points and more careful design of the deep learning model architectures and residual neural network can be a potential candidate. 展开更多
关键词 Deep Learning Neural Network MULTI-PHASE Oil Incompressible Fluid Physics Partial Differential Equation
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Prediction of Intraoperative Trifecta Achievement during Laparoscopic Partial Nephrectomy 认领
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作者 Ovidiu-Spiru Barnoiu F. J. Baron +3 位作者 T. Sæ ter A. O. Tysland A. Andersen 《泌尿学期刊(英文)》 2021年第1期6-16,共11页
<strong>Purpose:</strong> We introduce the concept of intraoperative Trifecta during laparoscopic partial nephrectomy (LPN) as the simultaneous achievement of estimated blood loss (EBL) < 500 ml, warm i... <strong>Purpose:</strong> We introduce the concept of intraoperative Trifecta during laparoscopic partial nephrectomy (LPN) as the simultaneous achievement of estimated blood loss (EBL) < 500 ml, warm ischemia time (WIT) < 20 minutes and minimal changes of the intraoperative course. The study’s aim was to find preoperative factors that could predict the likelihood of achieving intraoperative Trifecta and build a surgical nomogram. <strong>Methods:</strong> We retrospectively evaluated 122 patients who underwent LPN. Preoperative factors like age, sex, body-mass index (BMI), kidney function, tumor characteristics (R.E.N.A.L. score) and Charlson-Comorbidity-Index (CCI) were recorded. Intraoperative complication (IOC) was graded according to the Rosenthal classification. R software was used to find a predicting model for achievement of Trifecta using preoperative variables and a nomogram was built. <strong>Results: </strong>The surgical features include median EBL of 100 ml having 6.5% bleed > 500 ml, median WIT of 12 minutes having 7.3% more than 20 minutes. There was recorded a 12.3% IOC with a mean Rosenthal’s grade of 0.2. Intraoperative Trifecta was achieved in 105 patients (86%) and three preoperative factors were chosen for the predictive model: BMI (p = 0.041), CCI (p = 0.037) and RENAL score (p = 0.002). A nomogram was generated and the ROC-AUC of the model was 75.8%. <strong>Conclusion:</strong> We have defined an intraoperative Trifecta concept as the achievement of EBL < 500 ml, WIT < 20 minutes and minimal changes of the intraoperative course. A nomogram was developed from preoperative factors like BMI, CCI and R.E.N.A.L. score. It can be used to estimate the probability of Trifecta achievement in patients treated with LPN. 展开更多
关键词 Intraoperative Complications Laparoscopic Partial Nephrectomy PREDICTION Trifecta
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文章速递Calculating the Wave Force on Partially Immersed Large-Scale Horizontal Cylinders 认领
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作者 LIU Bi-jin FU Dan-juan 《中国海洋工程:英文版》 SCIE EI CSCD 2021年第2期291-300,共10页
Large-scale interceptors constitute the main structure of offshore self-driven floating marine litter collection devices,and the structural stability of such interceptors under the action of waves directly influences ... Large-scale interceptors constitute the main structure of offshore self-driven floating marine litter collection devices,and the structural stability of such interceptors under the action of waves directly influences the overall safety of the device.When the ratio of the diameter of a horizontal cylinder in such interceptors to the incident wavelength is larger than 0.25,the wave force can be calculated by using the diffraction theory,by considering the problem as that of the interaction between the waves and a partially immersed large-scale horizontal cylinder.In this study,an analytical approach to calculate the wave force on a partially immersed large-scale horizontal cylinder was formulated by using the stepwise approximation method.Physical model tests were conducted to investigate the effects of different factors(wave height,period,and immersion depth)on the wave force on a large-scale horizontal cylinder under conditions involving short-period waves.The results show that both horizontal and vertical wave forces on the cylinder increase as the wave height(immersion depth)increases in most cases.The vertical wave force decreases with the decrease of the period.For the horizontal wave force,it increases with the decrease of the period when the wavelength is larger than the diameter of the cylinder and decreases with the decrease of the period when the wavelength is smaller than the diameter of the cylinder. 展开更多
关键词 wave force large-scale horizontal cylinder diffraction theory partial immersion stepwise approximation method
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文章速递Surface Oxidation and Subsurface Microstructure Evolution of Alloy 690TT Induced by Partial Slip Fretting Corrosion in High-Temperature Pure Water 认领
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作者 Long Xin Yongming Han +2 位作者 Ligong Ling Yonghao Lu Tetsuo Shoji 《金属学报:英文版》 SCIE EI CAS CSCD 2021年第4期543-554,共12页
The surface oxidation and subsurface microstructure evolution of Alloy 690 TT can occur during partial slip fretting corrosion in high-temperature pure water.Detailed characterization methods such as laser scanning co... The surface oxidation and subsurface microstructure evolution of Alloy 690 TT can occur during partial slip fretting corrosion in high-temperature pure water.Detailed characterization methods such as laser scanning confocal microscopy,scanning electron microscopy,electron probe micro-analyzer,and transmission electron microscopy were used to reveal the related mechanism.The results showed that Cr2O3 oxides together with a small number of spinel oxides were formed in sticking region since a small quantity of high-temperature water could pass through the gaps between the asperities to oxidize the materials.Widespread distribution of oxides in microslip region consisted of(Ni,Fe)Cr2O4,because Ni2+and Fe2+ions could react with Cr2O3 to generate a small amount of non-stoichiometric spinel oxides.The oxides around micropitting in microslip region consisted of double-layer structure.The outermost layer contained(Fe,Cr)-rich oxides due to the effect of fretting leading to mechanical mixing between Cr2O3 and(Ni,Fe)(Fe,Cr)2O4.The inner layer consisted of(Fe,Ni)-rich oxides owing to the consumption of Cr2O3 by the reaction with Ni2+and Fe2+ions.The reciprocating motion of oxide particles in microslip region resulted in the stress-strain supporting the recrystallization for the formation and development of a tribologically transformed structure in subsurface and plowing effect by fretting in surface. 展开更多
关键词 Fretting corrosion Oxidation Partial slip Alloy 690TT Microstructure High-temperature water
Theoretical Studies on the Electronic Properties of R2M14B(R=Lanthanides from La to Lu;M=Mn,Fe,Co,and Ni) 认领
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作者 饶霜 林晨升 +1 位作者 何长振 柴国良 《结构化学》 SCIE CAS CSCD 2021年第2期160-168,145,共10页
To search for an alternative for Nd2Fe14B,we have studied the electronic structures of R2M14B compounds,where R stands for rare-earth element and M for Mn,Fe,Co and Ni.By density functional theory(DFT),we ... To search for an alternative for Nd2Fe14B,we have studied the electronic structures of R2M14B compounds,where R stands for rare-earth element and M for Mn,Fe,Co and Ni.By density functional theory(DFT),we discuss the atomic coordination environment and partial density of states(PDOS)in detail,with the emphasis on the interaction between the six kinds of M sites and the R atoms.We systemically calculated the electronic structures of sixty R2M14B compounds to provide systematic and reliable results for explaining the origination of magnetism,which is important for further development of Nd2Fe14B based magnet materials. 展开更多
关键词 partial density of states Nd2Fe14B density functional theory electronic structure
Yield-scaled nitrous oxide emissions from nitrogen-fertilized croplands in China: A meta-analysis of contrasting mitigation scenarios 认领
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作者 Garba ALIYU Jiafa LUO +5 位作者 Hong J.DI Deyan LIU Junji YUAN Zengming CHEN Tiehu HE Weixin DING 《土壤圈:英文版》 SCIE CAS CSCD 2021年第2期231-242,共12页
Nitrogen(N) losses in cropland resulting from the application of synthetic fertilizers decrease crop productivity and exacerbate environmental pollution.Mitigation measures, such as reduction in N fertilizer applicati... Nitrogen(N) losses in cropland resulting from the application of synthetic fertilizers decrease crop productivity and exacerbate environmental pollution.Mitigation measures, such as reduction in N fertilizer application rates, can have unintentional adverse effects on crop yield. We conducted a meta-analysis of soil N2O emissions from agricultural fields across China under contrasting mitigation scenarios as a novel approach to identify the most effective strategy for the mitigation of emissions of N2O derived from N fertilizer use in China. Current standard agricultural practice was used as a baseline scenario(BS), and 12 potential mitigation scenarios(S1–S12) were derived from the available literature and comprised single and combinations of management scenarios that accounted for crop yield. Mitigation scenarios S6(nitrification inhibitor 3,4-dimethylpyrazole phosphate) and S11(20% reduction in N application rate plus nitrification inhibitor dicyandiamide) in maize, rice, and wheat crops led to an average 56.0% reduction in N2O emissions at the national level, whereas scenario S4(nitrification inhibitor dicyandiamide) led to yield optimization, with a 14.0% increase for maize and 8.0% increase for rice as compared to the BS. Implementation of these most effective mitigation scenarios(S4, S6, and S11) might help China, as a signatory to the 2015 United Nations Framework Convention on Climate Change(Paris Agreement), to achieve a 30% reduction in N2O emissions by 2030. 展开更多
关键词 crop yield emission factor nitrification inhibitor nitrogen partial factor productivity N2O emission yield-scaled emission
Molecular pathways of liver regeneration:A comprehensive review 认领
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作者 Yana V Kiseleva Sevak Z Antonyan +3 位作者 Tatyana S Zharikova Kirill A Tupikin Dmitry V Kalinin Yuri O Zharikov 《世界肝病学杂志:英文版(电子版)》 2021年第3期270-290,共21页
The liver is a unique parenchymal organ with a regenerative capacity allowing it to restore up to 70%of its volume.Although knowledge of this phenomenon dates back to Greek mythology(the story of Prometheus),many aspe... The liver is a unique parenchymal organ with a regenerative capacity allowing it to restore up to 70%of its volume.Although knowledge of this phenomenon dates back to Greek mythology(the story of Prometheus),many aspects of liver regeneration are still not understood.A variety of different factors,including inflammatory cytokines,growth factors,and bile acids,promote liver regeneration and control the final size of the organ during typical regeneration,which is performed by mature hepatocytes,and during alternative regeneration,which is performed by recently identified resident stem cells called“hepatic progenitor cells”.Hepatic progenitor cells drive liver regeneration when hepatocytes are unable to restore the liver mass,such as in cases of chronic injury or excessive acute injury.In liver maintenance,the body mass ratio is essential for homeostasis because the liver has numerous functions;therefore,a greater understanding of this process will lead to better control of liver injuries,improved transplantation of small grafts and the discovery of new methods for the treatment of liver diseases.The current review sheds light on the key molecular pathways and cells involved in typical and progenitor-dependent liver mass regeneration after various acute or chronic injuries.Subsequent studies and a better understanding of liver regeneration will lead to the development of new therapeutic methods for liver diseases. 展开更多
关键词 Liver regeneration Molecular pathways Hepatic progenitor cells CYTOKINES Micro ribonucleic acid Partial hepatectomy
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Efficient Static Compaction of Test Patterns Using Partial Maximum Satisfiability 认领
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作者 Huisi Zhou Dantong Ouyang Liming Zhang 《清华大学学报:自然科学版(英文版)》 SCIE EI CAS CSCD 2021年第1期1-8,共8页
Static compaction methods aim at finding unnecessary test patterns to reduce the size of the test set as a post-process of test generation.Techniques based on partial maximum satisfiability are often used to track man... Static compaction methods aim at finding unnecessary test patterns to reduce the size of the test set as a post-process of test generation.Techniques based on partial maximum satisfiability are often used to track many hard problems in various domains,including artificial intelligence,computational biology,data mining,and machine learning.We observe that part of the test patterns generated by the commercial Automatic Test Pattern Generation(ATPG)tool is redundant,and the relationship between test patterns and faults,as a significant information,can effectively induce the test patterns reduction process.Considering a test pattern can detect one or more faults,we map the problem of static test compaction to a partial maximum satisfiability problem.Experiments on ISCAS89,ISCAS85,and ITC99 benchmarks show that this approach can reduce the initial test set size generated by TetraMAX18 while maintaining fault coverage. 展开更多
关键词 test compaction partial maximum satisfiability Automatic Test Pattern Generation(ATPG)
Study of Unforced Unsteadiness in Centrifugal Pump at Partial Flow Rates 认领
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作者 YANG Jun XIE Tian +2 位作者 LIU Xiaohua SI Qiaorui LIU Jun 《热科学学报:英文版》 SCIE EI CAS CSCD 2021年第1期88-99,共12页
In order to explore the unforced unsteadiness of centrifugal pumps,a 2-D frequency domain imaging display technology was used to study the development of these unsteady flow structures at partial flow conditions.The r... In order to explore the unforced unsteadiness of centrifugal pumps,a 2-D frequency domain imaging display technology was used to study the development of these unsteady flow structures at partial flow conditions.The results showed that,the unsteady flow field was not only affected by rotor and stator interaction,but also appeared an unforced unsteadiness with fundamental frequency of St≈0.23 around the impeller throat area.Moreover,as the flow rates decreased,this unsteady flow structure gradually weakened and disappeared.When the flow rate was reduced to 0.6 times of design flow rate,another two unforced unsteady flow structures with characteristic frequencies of St≈0.0714 and St≈0.12 began to appear in the same area.Therefore,with the operating condition smaller than design flow rate,the internal flow became more and more complex.In addition to the forced unsteadiness,the unforced unsteadiness which is not connected with the blade passage frequency became more and more obvious. 展开更多
关键词 centrifugal pumps partial flow conditions pressure pulsations unforced unsteadiness 2-D frequency domain visualization method
Petro Gram: An excel-based petrology program for modeling of magmatic processes 认领
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作者 Mesut Gündüz Kürsad Asan 《地学前缘:英文版》 SCIE CAS CSCD 2021年第1期81-92,共12页
Petro Gram is an Excel?based magmatic petrology program that generates numerical and graphical models.Petro Gram can model the magmatic processes such as melting,crystallization,assimilation and magma mixing based on ... Petro Gram is an Excel?based magmatic petrology program that generates numerical and graphical models.Petro Gram can model the magmatic processes such as melting,crystallization,assimilation and magma mixing based on the trace element and isotopic data.The program can produce both inverse and forward geochemical models for melting processes(e.g.forward model for batch,fractional and dynamic melting,and inverse model for batch and dynamic melting).However,the program uses a forward modeling approach for magma differentiation processes such as crystallization(EC:Equilibruim Crystallization,FC:Fractional Crystallization,IFC:Imperfect Fractional Crystallization and In-situ Crystallization),assimilation(AFC:Assimilation Fractional Crystallization,Decoupled FC-A:Decoupled Fractional Crystallization and Assimillation,A-IFC:Assimilation and Imperfect Fractional Crystallization)and magma mixing.One of the most important advantages of the program is that the melt composition obtained from any partial melting model can be used as a starting composition of the crystallization,assimilation and magma mixing.In addition,Petro Gram is able to carry out the classification,tectonic setting,multi-element(spider)and isotope correlation diagrams,and basic calculations including Mg^#,Eu/Eu^*,εSrandεNdwidely used in magmatic petrology. 展开更多
关键词 PetroGram Magmatic petrology Geochemical modeling Partial melting CRYSTALLIZATION ASSIMILATION Magma mixing
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Retroperitoneal laparoscopic partial resection of the renal pelvis for urothelial carcinoma:A case report 认领
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作者 Yan-Long Wang Hong-Lin Zhang +4 位作者 Hao Du Wei Wang Hai-Feng Gao Guang-Hai Yu Yu Ren 《世界临床病例杂志》 SCIE 2021年第8期1916-1922,共7页
BACKGROUND The standard treatment of transitional cell carcinoma of the upper urinary tract consists of radical nephroureterectomy with bladder cuff removal,which can be performed either in open or laparoscopy or robo... BACKGROUND The standard treatment of transitional cell carcinoma of the upper urinary tract consists of radical nephroureterectomy with bladder cuff removal,which can be performed either in open or laparoscopy or robot-assisted laparoscopy.Treatment of chronic renal insufficiency patients with upper urothelial tumor is in a dilemma.Urologists weigh and consider the balance between tumor control and effective renal function preservation.European Association of Urology guidelines recommend that select patients may benefit from endoscopic treatment,but laparoscopic treatment is rarely reported.CASE SUMMARY In this case report,we describe a case of 79-year-old female diagnosed with urothelial carcinoma of the renal pelvis and adrenal adenoma with chronic renal insufficiency.The patient was treated with retroperitoneal laparoscopic partial resection of the renal pelvis and adrenal adenoma resection simultaneously.CONCLUSION Retroperitoneal laparoscopic partial resection of the renal pelvis is an effective surgical procedure for the treatment of urothelial carcinoma of the renal pelvis. 展开更多
关键词 Transitional cell carcinoma Kidney sparing Chronic renal insufficiency LAPAROSCOPY Partial resection of the renal pelvis New effective surgical method
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Phase equilibrium modelling of the amphibolite facies metamorphism in the Yelapa-Chimo Metamorphic Complex, Mexico 认领
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作者 Fabian Gutierrez-Aguilar Peter Schaaf +3 位作者 Gabriela Solís-Pichardo Gerardo F.Arrieta-García Teodoro Hernandez-Trevino Carlos Linares-Lopez 《地学前缘:英文版》 SCIE CAS CSCD 2021年第1期293-312,共20页
The Yelapa-Chimo Metamorphic Complex forms part of the Jalisco Block in western Mexico and exposes a wide range of Early Cretaceous metamorphic rocks;such as paragneiss,orthogneiss,amphibolites,and migmatites.However,... The Yelapa-Chimo Metamorphic Complex forms part of the Jalisco Block in western Mexico and exposes a wide range of Early Cretaceous metamorphic rocks;such as paragneiss,orthogneiss,amphibolites,and migmatites.However,the pressure-temperature(P-T)conditions of metamorphism and partial melting remain poorly studied in the region.To elucidate metamorphic P-T conditions,phase equilibrium modelling was applied to two sillimanite-garnet paragneisses,one amphibole-orthogneiss,and one amphibolite.Sillimanite-garnet paragneisses exhibit a lepidoblastic texture with a biotite+sillimanite+kyanite+garnet+quartz+plagioclase+K-feldspar mineral assemblage.Amphibole-orthogneiss and amphibolite display a nematoblastic texture with an amphibole+(1)plagioclase+quartz+(1)titanite assemblage and an amphibole+(2)plagioclase+(2)titanite+ilmenite retrograde mineral assemblage.Pseudosections calculated for the two sillimanite-garnet paragneiss samples show P-T peak conditions at~6-7.5 kbar and~725-740℃.The results for amphibole-orthogneiss and the amphibolite yield P-T peak conditions at~8.5-10 kbar and~690-710℃.The mode models imply that metasedimentary and metaigneous units can produce up to~20 vol%and~10 vol%of melt,respectively.Modelling within a closed system during isobaric heating suggests that melt compositions of metasedimentary and metaigneous units are likely to have direct implications for the petrogenesis of the Puerto Vallarta Batholith.Our new data indicate that the Yelapa-Chimo Metamorphic Complex evolved through a metamorphic gradient between~23-33℃km^-1and the metamorphic rocks formed at depths between~22 km and~30 km with a burial rate of~2.0 km Ma^-1.Finally,the P-T data for both metasedimentary and metaigneous rocks provide new constraints on an accretionary framework,which is responsible for generating metamorphism and partial melting in the YelapaChimo Metamorphic Complex during the Early Cretaceous. 展开更多
关键词 Phase equilibrium modelling Yelapa-Chimo Metamorphic Complex Amphibolite facies Partial melting
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Libration and end body swing stabilization of a parallel partial space elevator system 认领
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作者 Gefei SHI Gangqiang LI Zheng H.ZHU 《中国航空学报:英文版》 SCIE EI CAS CSCD 2021年第3期187-199,共13页
This paper studies the libration and stabilization of a parallel partial space elevator system in circular orbits. The system is made up of two paralleled partial space elevators, each of which consists of one main sa... This paper studies the libration and stabilization of a parallel partial space elevator system in circular orbits. The system is made up of two paralleled partial space elevators, each of which consists of one main satellite, one end body and a climber moving along the tether between them.The libration characteristics of the elevator are studied through numerical analysis by a new dynamic model, and a novel control strategy is proposed to stabilize the swing of the end body by projecting the climber speeds only. Optimal control method is used to implement the new control strategy in the case where the climbers move in opposite direction. The simulation results validate the effectiveness of the proposed control strategy whose application will neither sacrifice the transport efficiency nor exacerbate libration significantly. 展开更多
关键词 Libration stabilization Nonlinear dynamics Optimal control Parallel partial space elevator Space tether
Harmonic scalpel versus traditional scissors in laparoscopic partial nephrectomy:A propensity score-based analysis 认领
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作者 Zhen Xu Congcong Xu +1 位作者 Jiawen Zheng Yichun Zheng 《腔镜、内镜与机器人外科》 2021年第1期19-23,共5页
Objective:The present study aims to compare the clinical efficacy of laparoscopic partial nephrectomy using a harmonic scalpel versus traditional scissor.Methods:A retrospective review was conducted in patients with l... Objective:The present study aims to compare the clinical efficacy of laparoscopic partial nephrectomy using a harmonic scalpel versus traditional scissor.Methods:A retrospective review was conducted in patients with localized renal tumors and scheduled for laparoscopic partial nephrectomy from January 2015 to December 2019.Eventually,225 patients joined this retrospective study.Patients were divided into the harmonic scalpel group or scissor group based on the method used,with 71 cases and 154 cases respectively.Propensity score matching(1:1)was performed to adjust for potential baseline confounders,and each group had 57 cases.Patient characteristics,perioperative clinical results,complications,and oncological results were compared between the two groups.Results:After matching,patient characteristics were not significantly different between the two groups.The scissor group was associated with a significantly shorter operative time(105 min vs.130 min,p<0.001),shorter warm ischemia time(19.35 min vs.22.07 min,p?0.005).However,the harmonic scalpel group was associated with significantly less estimated blood loss(20 mL vs.30 mL,p?0.013)and shorter length of stay(8 d vs.10 d,p?0.040).There was no significantly difference in indwelling time of drainage tube,perioperative complication,oncological outcomes or recurrence rates.Conclusions:The harmonic scalpel is used safely and effectively in laparoscopic partial nephrectomy,and has benefits in intraoperative blood loss and length of stay. 展开更多
关键词 Laparoscope partial nephrectomy Harmonic scalpel Scissor
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变电站高压电气设备局部放电检测方法研究 认领
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作者 赵明 孙建华 +2 位作者 张兰云 候江阁 袁鑫浩 《电力系统装备》 2021年第3期117-118,共2页
文章介绍了瞬态接地电压检测和UHF检测的原理,并讨论了局部放电确定方法,致力于提高检测的效率。
关键词 变电站结构 变压器 局部放电测试
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Dehydration melting of amphibolite at 1.5 GPa and 800–950C:Implications for the Mesozoic potassium-rich adakite in the eastern North China Craton 认领
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作者 Zhilin Ye Fang Wan +4 位作者 Neng Jiang Jingui Xu Yuanyun Wen Dawei Fan Wenge Zhou 《地学前缘:英文版》 SCIE CAS CSCD 2021年第2期896-906,共11页
Mesozoic intermediate-felsic magmatic rocks in the eastern North China Craton commonly show geochemical similarity to adakites.However,the lack of direct constraints from partial melting experiments at high pressures ... Mesozoic intermediate-felsic magmatic rocks in the eastern North China Craton commonly show geochemical similarity to adakites.However,the lack of direct constraints from partial melting experiments at high pressures and temperatures fuels a debate over the origin of these rocks.In this work,we performed partial melting experiments at 1.5 GPa and 800–950℃on amphibolite samples collected from the vicinity of the Mesozoic potassium-rich adakitic rocks in the Zhangjiakou area,northern margin of the North China Craton.The experimental melts range from granitic to granodioritic compositions,with SiO2=56.4–72.6 wt.%,Al2O3=16.1–19.3 wt.%,FeO*=2.4–9.6 wt.%,MgO=0.3–2.0 wt.%,CaO=0.6–3.8 wt.%,Na2O=4.7–5.3 wt.%,and K2O=2.6–3.9 wt.%,which are in the ranges of the surrounding Mesozoic potassium-rich adakitic rocks,except for the higher Al2O3contents and the data point at 1.5 GPa and 800℃.Trace element compositions of the melts measured by LA-ICP-MS are rich in Sr(849–1067 ppm)and light rare earth elements(LREEs)and poor in Y(<10.4 ppm)and Yb(<0.88 ppm),and have high Sr/Y(102–221)and(La/Yb)n(27–41)ratios and strongly fractionated rare earth element(REE)patterns,whereas no obvious negative Eu anomalies are observed.The geochemical characteristics show overall similarity to the Mesozoic potassium-rich adakitic rocks in the area,especially adakites with low Mg#,again except for the data point at 1.5 GPa and 800℃.The results suggest that partial melting of amphibolite can produce potassium-rich adakitic rocks with low Mg#in the eastern North China Craton under the experimental conditions of 1.5 GPa and 850–950℃.The experimental restites consist of hornblende(Hbl)+plagioclase(Pl)+garnet(Grt)±clinopyroxene(Cpx),a mineral assemblage significantly different from that of the nearby Hannuoba mafic granulite xenoliths which consist of Cpx+orthopyroxene(Opx)+Pl±Grt.Chemically,the experimental restites contain higher Al2O3but lower MgO and CaO than the Hannuoba mafic granulite 展开更多
关键词 AMPHIBOLITE Partial melting Eastern North China Craton Potassium-rich adakitic rocks Hannuoba granulite xenoliths
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The Link between Stochastic Differential Equations with Non-Markovian Coefficients and Backward Stochastic Partial Differential Equations 认领
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作者 Lin LIN Fang XU Qi ZHANG 《数学学报:英文版》 SCIE CSCD 2021年第3期447-457,共11页
In this paper, we conjecture and prove the link between stochastic differential equations with non-Markovian coefficients and nonlinear parabolic backward stochastic partial differential equations, which is an extensi... In this paper, we conjecture and prove the link between stochastic differential equations with non-Markovian coefficients and nonlinear parabolic backward stochastic partial differential equations, which is an extension of such kind of link in Markovian framework to non-Markovian framework.Different from Markovian framework, where the corresponding partial differential equation is deterministic, the backward stochastic partial differential equation here has a pair of adapted solutions, and thus the link has a much different form. Moreover, two examples are given to demonstrate the applications of the derived link. 展开更多
关键词 Backward stochastic partial differential equations stochastic differential equations nonMarkovian coefficients Girsanov transformation Feynman–Kac formula
Large deviation principle of occupation measures for non-linear monotone SPDEs 认领
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作者 Ran Wang Jie Xiong Lihu Xu 《中国科学:数学英文版》 SCIE CSCD 2021年第4期799-822,共24页
Using the hyper-exponential recurrence criterion,we establish the occupation measures’large deviation principle for a class of non-linear monotone stochastic partial differential equations(SPDEs)driven by Wiener nois... Using the hyper-exponential recurrence criterion,we establish the occupation measures’large deviation principle for a class of non-linear monotone stochastic partial differential equations(SPDEs)driven by Wiener noise,including the stochastic p-Laplace equation,the stochastic porous medium equation and the stochastic fast-diffusion equation.We also propose a framework for verifying hyper-exponential recurrence,and apply it to study the large deviation problems for strong dissipative SPDEs.These SPDEs can be stochastic systems driven by heavy-tailedα-stable process. 展开更多
关键词 stochastic partial differential equation large deviation principle occupation measure hyperexponential recurrence
Venetoclax in combination with chidamide and dexamethasone in relapsed/refractory primary plasma cell leukemia without t(11;14):A case report 认领
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作者 Yang Yang Li-Juan Fu +1 位作者 Chun-Mei Chen Mei-Wei Hu 《世界临床病例杂志》 SCIE 2021年第5期1175-1183,共9页
BACKGROUND Conventional therapies for primary plasma cell leukemia(pPCL)are usually ineffective,with a short remission time with the use of multiple myeloma medications,showing aggressiveness of pPCL.B-cell lymphoma-2... BACKGROUND Conventional therapies for primary plasma cell leukemia(pPCL)are usually ineffective,with a short remission time with the use of multiple myeloma medications,showing aggressiveness of pPCL.B-cell lymphoma-2 inhibitor venetoclax is usually used for relapsed/refractory multiple myeloma(RRMM)with t(11;14).There are very few studies published on the use of venetoclax in pPCL without t(11;14).Similarly,histone deacetylase inhibitors are considered effective for the treatment of RRMM,but there are no reports on their use in pPCL.CASE SUMMARY A 57-year-old woman with severe anemia,thrombocytopenia,multiple bone destruction,impaired renal function,and 42.7%of peripheral plasma cells is reported.After multiple chemotherapy regimens and chimeric antigen receptor Tcell treatment,the disease progressed again.The patient had very good partial response and was maintained for a long time on venetoclax in combination with chidamide and dexamethasone therapy.CONCLUSION The success of venetoclax-chidamide-dexamethasone combination therapy in achieving a very good partial response suggested that it can be used for refractory/relapsed pPCL patients who have been exhausted with the use of various drug combinations and had poor survival outcomes. 展开更多
关键词 RELAPSED/REFRACTORY Primary plasma cell leukemia Venetoclax CHIDAMIDE Very good partial response Case report
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