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文章速递Helicobacter Pylori Infections in Peptic Ulcer Perforations: A Retrospective Analysis in Two Referral Hospitals in Douala, Cameroon 认领
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作者 Francois Adrien Morel Bokalli Chi Fru McWright +4 位作者 Jerry Brown Njoh Aseneh Takere Maseoli Mbachan Ngomba Divine Mokake Jules Clément Assob Nguedia Marcelin Ngowe Ngowe 《外科学(英文)》 2020年第10期298-311,共14页
<strong>Background:</strong> Perforations are major complications of peptic ulcer disease and surgical emergencies with important mortality and morbidity. <em>Helicobacter pylori (H. pylori)</em&g... <strong>Background:</strong> Perforations are major complications of peptic ulcer disease and surgical emergencies with important mortality and morbidity. <em>Helicobacter pylori (H. pylori)</em> has been identified as one of the commonest factors associated with peptic ulcer disease. However, little is known about its implication in cases of perforations in Cameroon. We aimed to determine the frequency of <em>Helicobacter pylori</em> infections in cases of perforated peptic ulcers, describe clinical features and outcomes of these cases in Cameroon. <strong>Method:</strong> A hospital-based retrospective cross-sectional study was conducted through the review of patients’ records admitted for peptic ulcer perforations in Laquintinie and Douala General Hospitals over a period of 5 years (January 2014 - December 2018). We defined <em>H. pylori</em> infection as;positive result on tissue biopsy at time of surgery. We used SPSS version 23.0 to analyse data and set an alpha value at P = 0.05. <strong>Results:</strong> We reviewed 115 cases of peptic ulcer perforation, with a mean age of 40 years and sex ratio (M:F) of 5:1. All patients underwent emergency laparotomy, 48 (41%) cases had a biopsy report and the prevalence of <em>H. pylori</em> infection in these cases was 47.9 %. Smoking, alcohol consumption and Non-Steroidal Anti-inflammatory Drugs (NSAIDs) use, were not associated with peptic ulcer perforation. The morbidity was at 43.7% and mortality at 14%. Mortality was increasing with a higher Mannheim Peritonitis Index score (OR: 23.51, 95% CI: 4.197 - 143.003, P-value: 0.000). <strong>Conclusion:</strong> We observed a high prevalence of <em>H. pylori</em> infection in patients with peptic ulcer perforations. We recommend systematic <em>H. pylori</em> screening in cases of perforations and that larger studies should be carried out to evaluate the association of <em>H. pylori</em> infection with peptic ulcer perforation in Sub-Saharan Africa. 展开更多
关键词 Perforated Peptic Ulcers Helicobacter pylori Infections Clinical Features Outcome
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Analysis of Etiology and Clinical Characteristics of 1170 Patients with Symptomatic Epilepsy in Jianghan Plain 认领
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作者 Xianglin Cheng 《长江医药(英文)》 2020年第2期132-139,共8页
<strong>Objective:</strong> The etiology, clinical manifestations and treatment of 1170 patients with symptomatic epilepsy were retrospectively analyzed and provided guidance for further treatment of sympt... <strong>Objective:</strong> The etiology, clinical manifestations and treatment of 1170 patients with symptomatic epilepsy were retrospectively analyzed and provided guidance for further treatment of symptomatic epilepsy. <strong>Method: </strong>A retrospective analysis of 1170 cases of symptomatic epilepsy admitted to the First Affiliated Hospital of Yangtze University from January 2013 to June 2018 was conducted to analyze the etiology, clinical manifestations and treatment of different age groups.<strong> Results:</strong> Symptomatic epilepsy is high in the elderly, and men are more than women. Among the 1170 patients with symptomatic epilepsy, there were 81 (6.9%) cases of brain injury, 721 (61.6%) cases of cerebrovascular disease, 223 (19.0%) cases of tumor, 59 (5.0%) cases of central nervous system infection, 33 (2.8%) cases of immune metabolic disease, 11 (0.9%) cases of drugs, 6 (0.5%) cases of cortical dysplasia, 6 (0.5%) cases of neurodegenerative disease, 4 (0.3%) cases of parasites, 4 (0.3%) cases of poisons, and 22 (1.9%) cases of other diseases. Among them, central nervous system infection and cerebrovascular disease ranked first among the patients aged 0 - 18 years, followed by immune metabolic diseases;cerebrovascular disease ranked first among the patients aged 19 - 39 years, followed by tumors and brain trauma;cerebrovascular disease ranked first among the patients aged 40 - 65 years, followed by tumors and brain trauma;cerebrovascular disease ranked first among the patients aged over 65 years, followed by tumors, among the types of seizures, 74 (6.3%) cases of tonic seizures, 68 (5.8%) cases of clonic seizures, 856 (73.2%) cases of tonic-clonic seizures, 27 (2.3%) cases of myoclonic seizures, 12 (1.0%) cases of absence seizures, 116 (9.9%) cases of complicated partial seizures, and 17 (1.5%) cases of partial seizures, in addition to the etiology, 795 (67.9%) cases of sodium valproate, 152 (13.0%) cases of carbamazepine, 56 (4.8%) cases of topiramate, 117 (10.0%) cases of levetiracetam, 23 (2. 展开更多
关键词 Symptomatic Epilepsy ETIOLOGY Clinical Features TREATMENT
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Characteristics and Geological Significance of Aeromagnetic Data in the South of Shanxi 认领
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作者 Ming Wang Xueyi Xu +2 位作者 Zhenjun Liu Xiaoxing Lin Fang Li 《地球科学和环境保护期刊(英文)》 2020年第5期244-254,共11页
The study area is located in the south margin of the North China Block, the south end of the juncture between the Ordos Block and the Hehuai Block, which is part of Fen-Wei Graben System and located in the south of Sh... The study area is located in the south margin of the North China Block, the south end of the juncture between the Ordos Block and the Hehuai Block, which is part of Fen-Wei Graben System and located in the south of Shanxi Cenozoic fault basin in the central part of the North China Craton. The study area has complex regional geological structure, intense tectonic movement and frequent magmatic activities. Based on the latest high-precision aeromagnetic data, integrated interpretation was completed, combining with the existing geological and geophysical research results. According to the block features in different zones of the RTP aeromagnetic data, this article thoroughly studied the characteristics of aeromagnetic anomalies and found the relationship between aeromagnetic anomalies and surface geological information, and the fault distribution, magmatic rock distribution and magnetic characteristics in this area are discussed. 展开更多
关键词 HIGH-PRECISION AEROMAGNETIC Data Magnetic Field CHARACTERISTICS Fault Structure Features the SOUTH of SHANXI Lithologic CHARACTERISTICS
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Clinico-Pathological Study of Invasive Fungal Sinusitis in Ibadan, Nigeria: A Case Series 认领
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作者 Oluyemi Fasina Adekunle Daniel +1 位作者 Gabriel Olabiyi Ogun John A. Babarinde 《临床医学病理报告(英文)》 2020年第4期87-95,共9页
Background: Invasive fungal sinusitis is one of the less common forms of fungal infection more commonly described in North Africa and Asia. It affects healthy and immunologically competent individuals typically compli... Background: Invasive fungal sinusitis is one of the less common forms of fungal infection more commonly described in North Africa and Asia. It affects healthy and immunologically competent individuals typically complicating chronic rhinosinusitis. Surgical debridement and adjuvant antifungal treatment are the mainstay of management of this condition. Objective: To describe the clinical presentation, pathological features and management of patients with invasive fungal sinusitis managed at a tertiary health facility, southwestern Nigeria. Method: Medical records of all patients with invasive fungal sinusitis managed between January 2009 and December 2018 were retrospectively reviewed. Results: Six patients with invasive fungal sinusitis were managed during the study period. All patients were immunocompetent and the mean age at presentation was 30.7 years ± 7.2 years. The average duration of symptoms prior to presentation was 18.5 months (Interquartile range, 67.5 months), and all six patients had orbital involvement and intracranial extension of the mass at presentation. They all had surgical debridement, and the specimens were sent for histological examination. Mycological studies carried out on two specimens isolated Aspergillus fumigatusas the fungal agent and all patients were started on post-operative oral antifungal chemotherapy. Five patients completed their chemotherapy and fared well with no recurrence while one patient had irregular and incomplete antifungal treatment, and developed recurrent infection before abandoning further treatment. Conclusion: Chronic invasive fungal sinusitis is an uncommon infection and fairly difficult to manage. However, timely diagnosis and combined surgical and medical treatment can give good outcomes in the patients. 展开更多
关键词 Clinico-Pathological Features Ibadan IMMUNOCOMPETENT INVASIVE FUNGAL SINUSITIS NIGERIA
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CT Imaging Evolution of Novel Coronavirus Pneumonia during Hospitalization 认领
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作者 Youmin Guo 《放射学期刊(英文)》 2020年第3期127-137,共11页
<strong>Object:</strong> To evaluate CT Features on serial thin-section computed tomographic (CT) scans in patients with conventional Novel Coronavirus Pneumonia (COVID-19) for the period during which they... <strong>Object:</strong> To evaluate CT Features on serial thin-section computed tomographic (CT) scans in patients with conventional Novel Coronavirus Pneumonia (COVID-19) for the period during which they remained hospitalized. <strong>Methods:</strong> In this Retrospective study, we collected clinical information including Laboratory investigations and more importantly we focused on collecting imaging data of these 15 selected patients (8 men and 7 women, 22 - 70 years old, average age (45 <span style="white-space:nowrap;">±</span> 15)) with COVID-19 disease. The mean time between the initial and repeat thin-section CT scans was 3.3 <span style="white-space:nowrap;">±</span> 2.1 days, 7.9 <span style="white-space:nowrap;">±</span> 2.1 days, 14.2 <span style="white-space:nowrap;">±</span> 1.3 days after onset of symptoms in these 15 patients. Three experienced Radiologists reviewed the CT images independently and also in collaboration with each other for complicated or unique cases, for the Imaging characteristics like number and site of lesions, distribution of lesions whether it is lobular, lobar, unilateral or bilateral, and comparing the severity of disease in relation to the CT findings. The CT features were compared using the χ<sup>2</sup> test and <em>Fisher’s </em>exact probability.<strong> Results:</strong> All of 15 patients had a history of visit to the endemic center <em>i.e.</em> Wuhan city or came in direct contact with an infected individual. Fever (93.3%) was the most common symptom. Majority of patients had a normal white blood cell count, and normal lymphocyte count although there were patients with leucopenia and lymphocytopenia. CT images showed predominate Ground-Glass opacities in the initial and repeat CT scans with a percentage of 90.6%, 53.9%, 44.2% respectively during the three spaced CT examinations;most patients had bilateral lung involvement (60%, 93.3%, 93.3%), the lesions predominantly involved the posterior (87.5%, 71.9%, 76.6%) and peripheral (90.6%, 84.3%, 85.7%) part of 展开更多
关键词 Novel Coronavirus Pneumonia (COVID-19) CT Features Follow-Up Studies
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Effective Opinion Spam Detection: A Study on Review Metadata Versus Content 认领
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作者 Ajay Rastogi Monica Mehrotra Syed Shafat Ali 《数据与情报科学学报:英文版》 CSCD 2020年第2期76-110,共35页
Purpose:This paper aims to analyze the effectiveness of two major types of features—metadata-based(behavioral)and content-based(textual)—in opinion spam detection.Design/methodology/approach:Based on spam-detection ... Purpose:This paper aims to analyze the effectiveness of two major types of features—metadata-based(behavioral)and content-based(textual)—in opinion spam detection.Design/methodology/approach:Based on spam-detection perspectives,our approach works in three settings:review-centric(spam detection),reviewer-centric(spammer detection)and product-centric(spam-targeted product detection).Besides this,to negate any kind of classifier-bias,we employ four classifiers to get a better and unbiased reflection of the obtained results.In addition,we have proposed a new set of features which are compared against some well-known related works.The experiments performed on two real-world datasets show the effectiveness of different features in opinion spam detection.Findings:Our findings indicate that behavioral features are more efficient as well as effective than the textual to detect opinion spam across all three settings.In addition,models trained on hybrid features produce results quite similar to those trained on behavioral features than on the textual,further establishing the superiority of behavioral features as dominating indicators of opinion spam.The features used in this work provide improvement over existing features utilized in other related works.Furthermore,the computation time analysis for feature extraction phase shows the better cost efficiency of behavioral features over the textual.Research limitations:The analyses conducted in this paper are solely limited to two wellknown datasets,viz.,Yelp Zip and Yelp NYC of Yelp.com.Practical implications:The results obtained in this paper can be used to improve the detection of opinion spam,wherein the researchers may work on improving and developing feature engineering and selection techniques focused more on metadata information.Originality/value:To the best of our knowledge,this study is the first of its kind which considers three perspectives(review,reviewer and product-centric)and four classifiers to analyze the effectiveness of opinion spam detection using two m 展开更多
关键词 Opinion spam Behavioral features Textual features Review spammers Spam-targeted products
Shape Retrieval Using Fourier Descriptors Applied to Industrial Process 认领
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作者 Julio-Alejandro Romero-González Rosamaría Romero-González +2 位作者 Marcela Herrera-Navarro Diana-Margarita Córdova-Esparza Hugo Jiménez-Hernández 《电脑和通信(英文)》 2020年第3期43-52,共10页
Nowadays, manufacturing processes are carried out at speeds that they themselves demand and subject to rigorous standards to maintain the quality of materials. An important step to define the quality of products in me... Nowadays, manufacturing processes are carried out at speeds that they themselves demand and subject to rigorous standards to maintain the quality of materials. An important step to define the quality of products in metalworking is the casting process, which principal focus is seeking control and monitoring of properties of materials. Nevertheless, it is not easy due to the high temperatures and gas produced in the vessel. Although some researchers have been attempting to solve these problems, it is difficult to carry out due to hard conditions. This article proposes the analysis of the surface of the liquid metal, that is, the slag on the surface, which is considered as connected spaces characterized by the topology of their discrete surface. These spaces are described through Fast Fourier Transform, associating changes of intensities to the frequency domain and obtaining main features of these frequencies, these features are used to define an enveloping shape that represents the liquid metal. Finally, the results obtained are presented, which, according to them shows that it is possible to characterize the slag, and by which it is possible to spatially locate the molten metal liquid in the refractory. Therefore, this research serves as the basis for the development of new algorithms for level detection and measurement, preventing overflows and damage to refractories. 展开更多
关键词 CONVEX HULL Shape RETRIEVAL Features Detection FOURIER TRANSFORM Vision COMPUTING
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An SLGC Model for Asian Food Image Classification 认领
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作者 Ruoqi Wu Shuai Zhao Zhijian Qu 《电脑和通信(英文)》 2020年第4期26-43,共18页
As a fine-grained classification problem, food image classification faces many difficulties in the specific implementation. Different countries and regions have different eating habits. In particular, Asian food image... As a fine-grained classification problem, food image classification faces many difficulties in the specific implementation. Different countries and regions have different eating habits. In particular, Asian food images have a complicated structure, and the related classification methods are still very scarce. There is an urgent need to develop a feature extraction and fusion scheme based on the characteristics of Asian food images. To solve the above problems, we proposed an image classification model SLGC (SURF-Local and Global Color) that combines image segmentation and feature fusion. By studying the unique structure of Asian foods, the color features of the images are merged into the representation vectors in the local and global dimensions, respectively, thereby further enhancing the effect of feature extraction. The experimental results show that the SLGC model can express the intrinsic characteristics of Asian food images more comprehensively and improve classification accuracy. 展开更多
关键词 ASIAN FOOD IMAGE Classification IMAGE SEGMENTATION FEATURE Fusion BAG of Features
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Radiographic Features of Osteogenesis Imperfecta about a Female Sibship 认领
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作者 B. M. A. Tiemtore-Kambou A. M. Napon +5 位作者 N.-A. Ndé-Ouédraogo A. Koutou I. F. N. Sieba I. Ouédraogo O. Diallo R. Cissé 《医学影像期刊(英文)》 2020年第1期52-61,共10页
Osteogenesis imperfecta (OI) belongs to a group of congenital osteoporosis which hallmark feature is “affecting skeleton, increasing bone fragility that fracture easily and decreasing bone density due to quantitative... Osteogenesis imperfecta (OI) belongs to a group of congenital osteoporosis which hallmark feature is “affecting skeleton, increasing bone fragility that fracture easily and decreasing bone density due to quantitative and/or qualita-tive abnormalities”. We report a female sibling’s involvement in 3 cases with probable recessive inheritance pattern. Only female aged between 5 and 13 years were affected with skeletal lesions in the lower limbs. The boy of this family had no skeletal or extra-skeletal lesions. Their parents had no affection and no bond of consanguinity. The observed malformations can be classified as type V or VI according to Sillence’s clinical classification. Lack of genetic test in our context has limited accuracy of the diagnosis as new data evoke a genetic classification into 12 types that leading an effective therapeutic management. 展开更多
关键词 OSTEOGENESIS Imperfecta FAMILIAL INVOLVEMENT FEMALE RADIOLOGICAL Features RECESSIVE Mode
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Clinical Manifestation of Congenital Aniridia in Indonesia 认领
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作者 Irawati Irfani Levandi Mulja +3 位作者 Sesy Caesarya Primawita Oktarima Mayasari Wahyu Feti K. Memed 《眼科学期刊(英文)》 2020年第2期133-141,共9页
Background: Congenital aniridia is a rare, panophthalmic disorder that can cause vision loss. Knowledge of aniridia as an isolated ocular abnormality or as a part of systemic abnormalities is important. Management of ... Background: Congenital aniridia is a rare, panophthalmic disorder that can cause vision loss. Knowledge of aniridia as an isolated ocular abnormality or as a part of systemic abnormalities is important. Management of congenital aniridia should be carried out comprehensively based on it. Objective: To describe clinical features and management of congenital aniridia in a top referral eye hospital in Indonesia. Methods: A retrospective study involving 43 eyes of 22 children (younger than 18 years) diagnosed with congenital aniridia from 2013 to 2018. A detailed history was taken and a complete ophthalmic examination and a systemic examination were performed as required. Clinical characteristics associated with ocular and systemic manifestation and its management were noted. Results: Mean age of patients was 7.6 ± 5.2 years (range 0 - 17 years). Most cases were female (55%) and sporadic (77%). Twenty-one (96%) patients had bilateral involvement at presentation. Foveal hypoplasia was found in 36 eyes (84%), followed by cataract in 26 eyes (61%) and secondary glaucoma in 13 eyes (30%). Nine patients (43%) with cataract had cataract surgery performed. Only 1 patient (5%) with secondary glaucoma underwent filtration surgery. All patients had moderate to severe visual impairment and low vision aid was considered. Regarding its systemic manifestation, none of the patients was diagnosed with an abnormality in the abdomen. Conclusion: There were various ocular features associated with congenital aniridia. Understanding the clinical characteristic and its management could improve the quality of vision in aniridia patients. 展开更多
关键词 CONGENITAL ANIRIDIA CLINICAL FEATURES MANAGEMENT
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文章速递Clinical features and prognosis of patients with novel coronavirus pneumonia complicated with diabetes 认领
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作者 Ye-Long Ji Yang Wu +3 位作者 Yan Leng Yi Zhang Ai-Ning Zhang Zhong-Yuan Xia 《海南医科大学学报:英文版》 2020年第15期1-5,共5页
Objective:To analyze the clinical characteristics and laboratory examinations of patients with new coronavirus(COVID-19)and compare the effect and prognosis of patients with diabetes mellitus(DM)on COVID-19.Methods:56... Objective:To analyze the clinical characteristics and laboratory examinations of patients with new coronavirus(COVID-19)and compare the effect and prognosis of patients with diabetes mellitus(DM)on COVID-19.Methods:56 cases of COVID-19 with DM and 85 age-matched admitted patients without DM who were admitted to the People's Hospital of Wuhan University from January 31,2020 to March 15,2020 were analyzed through a retrospective cohort study.Patients data were collected through electronic cases,and used SPSS 26.0 and Graphpad Prism 8.0 statistical software to compare changes in various indicators of patients in DM and non-DM groups and to draw the survival curves.Results:Compared with the non-DM group,the DM group has a higher percentage of mechanical ventilation,higher mortality and severe patients,with a higher proportion of initial symptoms of nausea and hypertension(P<0.05).There were no significant differences in the gender,initial symptoms(except nausea),the combined underlying diseases(except hypertension)between the two groups(P<0.05);The white blood cell,centroblast count,CRP,PCT,PT,D-dimer,total bilirubin,Urea,LDH,CK,MB,hs-TnI,CK-MB,NT-proBNP were higher in the DM group(P<0.05),and lymphocytes,single Nuclear cell,CD3,CD4,and CD8 counts were low(P<0.05).There was no statistically significant difference in platelet,IL-6,APTT,ALT,AST,Cr and CD19 counts between the two groups.Conclusion:Compared with COVID-19 patients with non-DM,COVID-19 patients with DM have a higher proportion of mortality and severe cases.Heart function,liver and kidney function,immune function damage and coagulation dysfunction are more obvious.Therefore,the monitoring of such patients should be strengthened,and active treatment should be performed to improve the prognosis. 展开更多
关键词 COVID-19 Diabetes Clinical features Laboratory examination Prognosis
文章速递Wave propagation analysis for a second strain gradient rod theory 认领
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作者 Guang ZHU Christophe DROZ +1 位作者 Abdelmalek ZINE Mohamed ICHCHOU 《中国航空学报:英文版》 SCIE EI CAS CSCD 2020年第10期2563-2574,共12页
In this work,an enriched model describing the longitudinal wave propagation is established based on Mindlin’s Second Strain Gradient(SSG)theory,which can describe the heterogeneity caused by the micro-structure inter... In this work,an enriched model describing the longitudinal wave propagation is established based on Mindlin’s Second Strain Gradient(SSG)theory,which can describe the heterogeneity caused by the micro-structure interactions in the frame of continuum mechanics.The governing equation and associated boundary conditions are derived based on Hamilton’s principle,then the dispersion relation of non-classical longitudinal wave together with the extra-waves appearing exclusively in SSG theory model are investigated.The investigations are based on the modal density,energy flow,and forced response of the rod.Wave transmission and reflection through planar interfaces based on the proposed model have been calculated.Finally,the results of the enriched model are well interpreted by comparing with the classical theory results,and some useful conclusions are derived on the SSG theory based model in the wave propagation characterization. 展开更多
关键词 Dynamic behavior Energy flow Enriched rod model Reflection and transmission Second strain gradient theory Wave propagation features
文章速递智能化供配电系统在工业电气自动化中的应用与研究 认领
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作者 莫小红 《现代科学仪器》 2020年第5期124-129,共6页
在工业电气自动化系统中,越来越多的传感器加入到了供配电系统之中,形成了智能化的供配电系统。针对智能配电系统的多种需求问题,本文分析了温度、湿度以及水位高度等需要检测的重点参数,介绍了参数监测的意义,并针对目前典型的智能配... 在工业电气自动化系统中,越来越多的传感器加入到了供配电系统之中,形成了智能化的供配电系统。针对智能配电系统的多种需求问题,本文分析了温度、湿度以及水位高度等需要检测的重点参数,介绍了参数监测的意义,并针对目前典型的智能配电系统结构进行了简要分析与阐述,介绍了其使用过程中的特点与应用,基于此提出了一种功能健全的监控系统,并且对其基本功能进行了理论设计。通过本文的介绍,能够对如今工业电气自动化中的供配电系统智能化改造提供一定的参考以及借鉴,具有一定的理论以及实际工程应用价值。 展开更多
关键词 工业电气自动化 供配电系统 智能化 结构 特点 功能设计
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文章速递松嫩平原南部地下水流场特征及环境地质问题研究 认领
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作者 姜侠 姜清龙 孟立志 《地下水》 2020年第5期80-82,共3页
松嫩平原位于东北地区中部,松辽平原北部,是我国大型商品粮生产基地和重要的能源、化工、汽车及机械制造基地,是东北老工业企业主要分布区之一。地下水作为水资源的一部分,在松嫩平原的社会经济发展和维持生态环境中发挥着不可替代的作... 松嫩平原位于东北地区中部,松辽平原北部,是我国大型商品粮生产基地和重要的能源、化工、汽车及机械制造基地,是东北老工业企业主要分布区之一。地下水作为水资源的一部分,在松嫩平原的社会经济发展和维持生态环境中发挥着不可替代的作用,随着经济的发展和人口的增长,水资源供需之间的矛盾越来越突出,生态环境压力越来越大,许多工作与地下水有直接关系的环境问题已经影响到了社会经济的发展,甚至于人类的长期生存。特别是松嫩平原南部原有的水文地质调查数据和成果已无法满足当代地下水资源开发和地质环境保护与管理的需要,亟街更新。通过统测点调查及地下水位统测,基本查明地下水流场、稳定与非稳定降落漏斗的数量及其特征,并提出易引发的环境地质问题。 展开更多
关键词 松嫩平原南部 地下水流场 特征 环境地质问题
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文章速递具有混合所有制特征的二级学院管理机制研究 认领
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作者 刘丹 《石家庄职业技术学院学报》 2020年第4期5-8,共4页
职业院校开展混合所有制办学是深化产教融合,激发办学活力的重要途径之一.在职业院校混合所有制办学探索中,具有混合所有制特征的二级学院是较为典型的一种模式.现阶段,很多职业院校进行了这种形式的混合所有制探索,但从管理机制来看,... 职业院校开展混合所有制办学是深化产教融合,激发办学活力的重要途径之一.在职业院校混合所有制办学探索中,具有混合所有制特征的二级学院是较为典型的一种模式.现阶段,很多职业院校进行了这种形式的混合所有制探索,但从管理机制来看,这种办学模式仍存在产权管理机制和办学成本管理机制不够完善,管理机构运行效率有待提高,日常管理有待细化等问题.要进一步完善具有混合所有制特征的二级学院管理机制,需推进股份制二级学院改革,建立项目管理机制,不断细化管理制度. 展开更多
关键词 混合所有制 特征 二级学院 管理机制 策略
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文章速递Clinical and dermoscopic features of livedoid vasculopathy 认领
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作者 Juan Wen Xiao-Hong Li +1 位作者 Qiu-Ping Yang Jian-Bin Yu 《中华医学杂志:英文版》 SCIE CAS CSCD 2020年第17期2137-2138,共2页
To the Editor:Livedoid vasculopathy(LV)is a thromboocclusive disorder involving superficial and mid-dermis vessels,characterized by painful erythematous or purpuric macules or papules,small crusted ulcers,and porcelai... To the Editor:Livedoid vasculopathy(LV)is a thromboocclusive disorder involving superficial and mid-dermis vessels,characterized by painful erythematous or purpuric macules or papules,small crusted ulcers,and porcelainwhite atrophic scars that remain after several months.[1,2]Dermoscopy is a non-invasive and effective image analysis technology[3]that can aid dermatologists in visualization of the pigmentation pattern and vascular structure,as well as other morphologic features of the epidermis and dermis.This study was performed to identify the clinical and dermoscopic features of LV in patients with LV who were treated in our hospital from October 2017 to August 2018.The study was approved by the Ethical Committee of the First Affiliated Hospital of Zhengzhou University(No.2018-YB-05).The study was performed in accordance with the established guidelines and regulations.We have obtained all appropriate patient consent forms.In the form,the patients have given their consents for their images and other clinical information to be reported in the journal. 展开更多
关键词 superficial features journal
文章速递埋藏型视盘玻璃疣光学相干断层扫描血管成像的影像特征及其诊断价值 认领
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作者 田莎 赵玥 姚进 《眼科学报》 2020年第4期219-227,共9页
目的:观察埋藏型视盘玻璃疣(optic disc drusen,ODD)的光学相干断层扫描血管成像(optical coherence tomography angiography,OCTA)影像特征表现,探讨其对本疾病的临床诊断价值。方法:选取2017年1月至2018年12月于南京医科大学附属眼科... 目的:观察埋藏型视盘玻璃疣(optic disc drusen,ODD)的光学相干断层扫描血管成像(optical coherence tomography angiography,OCTA)影像特征表现,探讨其对本疾病的临床诊断价值。方法:选取2017年1月至2018年12月于南京医科大学附属眼科医院就诊并确诊为埋藏型ODD的患者,共13例20只眼,其中7例14只眼为双眼发病,6例6只眼为单眼发病。分析所有患者的临床资料,总结本疾病在OCTA中的影像特征。结果:所有患眼眼底检查可见视盘隆起,生理性视杯消失,可伴有视盘血管分支异常、血管粗大、血管增多并扭曲等异常改变,可伴有视盘旁出血;B型超声检查可见视盘处呈局部高回声隆起,钙样物质呈强回声;眼底血管荧光造影(fundus fluorescein angiography,FFA)示玻璃疣晚期呈高荧光着染,无荧光渗漏。OCTA示视盘境界不清,神经纤维层较正常显著增厚,视盘凹陷根据玻璃疣体积大小不同有差异,联合B扫描断层(B-scan)可见神经上皮层间有类团状高反射,似有囊膜包裹,内部无血流信号。当并发缺血性视神经病变时,视盘缺血区可见相对应的放射状盘周毛细血管(radial peripapillary capillaries,RPC)血流密度降低。OCTA随访观察可见4例并发视盘旁出血的患眼经口服药物(和血明目片)治疗后,出血逐渐完全吸收,玻璃疣处局部隆起同前,无明显变化。结论:OCTA在埋藏型ODD中具有特征性表现,多模式影像可帮助临床进一步明确诊断与鉴别,具有一定的临床价值,无创快捷是其最大优势。 展开更多
关键词 埋藏型视盘玻璃疣 光学相干断层扫描血管成像 特征 诊断
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文章速递侵袭性垂体腺瘤磁共振成像特征与预后相关性分析 认领
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作者 刘卉 张强 +1 位作者 杭伟 刘钢 《中华耳鼻咽喉头颈外科杂志》 CAS CSCD 北大核心 2020年第10期926-933,共8页
目的探讨常规MR、弥散加权成像技术和动态对比增强征象在侵袭性垂体腺瘤中的应用,研究其影像学特征与预后之间的相关性。方法回顾性分析2017年6月至2018年6月天津市环湖医院47例侵袭性垂体腺瘤(invasive pituitary adenomas,IPA)的T1WI... 目的探讨常规MR、弥散加权成像技术和动态对比增强征象在侵袭性垂体腺瘤中的应用,研究其影像学特征与预后之间的相关性。方法回顾性分析2017年6月至2018年6月天津市环湖医院47例侵袭性垂体腺瘤(invasive pituitary adenomas,IPA)的T1WI、T2WI、ADC、动态对比增强MR的影像学表现与临床特征、病理学资料等;并与16例非侵袭性垂体腺瘤(non-invasive pituitary adenoma,NIPA)进行比较,观察两者在MR征象、ADC值和T1WI、T2WI图像上的肿瘤/白质信号强度比值和时间信号-曲线类型、强化峰值时间、平均强化速率方面的差异。所有病例术后复查MR增强扫描以及相关激素表达水平,用来评估预后,Logistic逐步回归分析IPA影像学特征与预后之间的关系。结果肿瘤的位置、形状、大小、Knosp分级、ADC值在IPA与NIPA 2组差异有统计学意义(χ^2值分别为41.344、21.818、28.596,t值分别为5.869、11.720,P值均<0.05)。T1WI、T2WI和增强不均质信号大部分发生于IPA组(P<0.05),IPA呈快速强化和快速消退的双期强化特征,鞍内瘤体与海绵窦侵袭性瘤体强化峰值时间差异有统计学意义(P<0.05)。2组在T1信号强度、扩散受限、双期强化特征方面差异无统计学意义(P值均>0.05)。T2WI瘤体/白质信号两者的比值和ADC值与IPA瘤体质地呈明显相关性。IPA中全切除9例(19%),次全切除25例(53%),部分切除13例(28%)。术后治愈9例(19%),症状改善29例(62%),缓解6例(13%),未愈3例(6%)。术后进行药物治疗7例,放射辅助治疗15例。术后随访7~16个月,中位随访时间12.5个月,复发8例(17%)。IPA肿瘤质地不同,其手术全切/次全切除率、术后症状改善率、术后需要辅助治疗率差异均有统计学意义(P值均<0.05))。Knosp分级、肿瘤大小、T2WI瘤体/白质比值与IPA复发有关(P值均<0.05)。结论通过MR、弥散加权成像征象分析肿瘤在蝶鞍区的分布、形状、大小、ADC值及信号差异,有助于诊断IPA。联合动态对比增强特征可以早期判断IPA及其对周围组织的侵犯,通过影像征象评估肿瘤的质地,从而更好地评估IPA的治疗效果及预后。 展开更多
关键词 垂体瘤 侵袭性 磁共振成像 特征 预后
文章速递Magnetic resonance imaging findings of carcinoma arising from anal fistula: A retrospective study in a single institution 认领
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作者 Xin Zhu Tian-Shu Zhu +1 位作者 Dan-Dan Ye Shao-Wei Liu 《世界临床病例杂志》 SCIE 2020年第21期5159-5171,共13页
BACKGROUND Magnetic resonance imaging(MRI)is currently the standard investigation for suspected perianal diseases.Carcinoma arising from anal fistula is very rare,and early diagnosis is often difficult.AIM To describe... BACKGROUND Magnetic resonance imaging(MRI)is currently the standard investigation for suspected perianal diseases.Carcinoma arising from anal fistula is very rare,and early diagnosis is often difficult.AIM To describe and summarize the MRI findings of carcinoma arising from anal fistula.METHODS In this retrospective study,records of ten patients diagnosed with carcinoma arising from anal fistula and confirmed by surgery(n=7)or biopsy(n=3)between June 2006 and August 2018 were analyzed.All patients underwent preoperative pelvic MRI.Morphologic features,signal characteristics,fistula between the mass and the anus,contrast enhancement of mass,signal and enhancement of peritumoral areas,and regional lymphadenopathy were assessed.RESULTS All ten tumors were solitary(8 mucinous adenocarcinomas and 2 adenocarcinomas).The maximum diameter of the tumors ranged from 3.4 cm to 12.4 cm(median:4.15 cm;mean:5.68 cm).Eight patients had a fistula between the mass and the anus.Contrast enhancement of the peritumoral areas was noted in three(3/5)patients.Perirectal or inguinal lymphadenopathy was noted in seven patients.Most lesions of mucinous adenocarcinoma were multiloculated and cauliflower-like,with a thin capsule and focally unclear boundary.They were markedly hyperintense on fat-suppressed T2WI,slightly hyperintense with focal hyperintensity on diffusion-weighted imaging(DWI),and hyperintense with focal hypointensity on apparent diffusion coefficient(ADC)map,with progressive mesh-like contrast enhancement.Adenocarcinomas had an infiltrative margin without a capsule and appeared heterogeneously hyperintense or slightly hyperintense on fat-suppressed T2WI,hyperintense on DWI,and hypointense on ADC map,with persistent heterogeneous enhancement.CONCLUSION Our study highlighted several characteristic and potentially helpful MRI findings to diagnose carcinomas arising from anal fistula. 展开更多
关键词 Anal fistula Carcinoma Magnetic resonance imaging Morphologic features Signal characteristics Differential diagnosis
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《北京官话全编》时间副词研究 认领
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作者 胡馨丹 《现代语文》 2020年第3期63-68,共6页
《北京官话全编》是一部新发现的域外汉语教科书,大约成书于清末民初。它较为完整地呈现出晚清民国时期北京话口语的语言面貌。《全编》的时间副词十分丰富,共计155个,其中,复音节词语占绝对优势。部分时间副词正处于语法化的中间阶段,... 《北京官话全编》是一部新发现的域外汉语教科书,大约成书于清末民初。它较为完整地呈现出晚清民国时期北京话口语的语言面貌。《全编》的时间副词十分丰富,共计155个,其中,复音节词语占绝对优势。部分时间副词正处于语法化的中间阶段,尚未完全虚化,仍保留一些实义特征,兼具动词和副词两种词性。有些时间副词具有鲜明的北京方言特征,有不少副词带有儿化韵。 展开更多
关键词 《北京官话全编》 时间副词 特点
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