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农户用机械通风钢网式小麦干燥储藏仓的气流场分析 认领
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作者 刘立意 汪雨晴 +3 位作者 赵德岩 王旭光 娄正 柳芳久 《农业工程学报》 EI CAS CSCD 北大核心 2020年第2期312-319,共8页
为保障农户收获后高水分粮食不落地安全储藏,针对一种仓壁透气中心带通风立筒的圆形钢网式农户储粮干燥仓,应用CFD法对收获后高水分小麦在进行机械通风时的气流场进行仿真分析,将仓内小麦堆等效为多孔介质,分析静压、动压、流量等空间... 为保障农户收获后高水分粮食不落地安全储藏,针对一种仓壁透气中心带通风立筒的圆形钢网式农户储粮干燥仓,应用CFD法对收获后高水分小麦在进行机械通风时的气流场进行仿真分析,将仓内小麦堆等效为多孔介质,分析静压、动压、流量等空间分布规律。结果表明:仓内静压和动压值随半径(横向)增加呈指数衰减;柱面流量随半径呈幂函数衰减;横截面流量随高度呈指数衰减;粮堆区竖向通风均匀度显著优于横向(径向);流量分布为仓底>上粮面>仓壁,仓壁气流流量只占总流量的24.6%;实仓风速测试结果与仿真分析结果规律一致,平均相对误差为16.35%,表明基于多孔介质模型和CFD法分析钢网式储粮干燥仓的流场分析具有较好的准确性,研究结果为此类钢网式储粮仓流场分析和优化提供了方法和依据。 展开更多
关键词 粮食 储藏 农户储粮仓 机械通风 流场分析 CFD法 多孔介质
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Heating Characteristics and Economic Analysis of a Controllable On-Demand Heating System Based on Off-Peak Electricity Energy Storage 认领
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作者 YIN Shaowu SHI Yongle +3 位作者 TONG Lige LIU Chuanping WANG Li DING Yulong 《热科学学报:英文版》 SCIE EI CAS CSCD 2020年第2期343-351,共9页
The working principle of a controllable on-demand heating system based on off-peak electricity energy storage(COHSBOEES) is as follows: the cheap off-peak electricity energy is converted into heat energy for storage i... The working principle of a controllable on-demand heating system based on off-peak electricity energy storage(COHSBOEES) is as follows: the cheap off-peak electricity energy is converted into heat energy for storage in the evening, and the heat energy can be extracted on demand for heating during daytime peak or flat electricity periods. This technology can promote the smooth operation of the power grid, solve the problem of peak regulation for the electrical network, and promote renewable energy consumption. Based on the controllable on-demand heating strategy, a COHSBOEES for a heating area of 1000 m~2 was designed and built. Variations in the energy consumption and operating cost of the COHSBOEES in different heating situations were analyzed. The results showed that, off-peak electricity energy storage for heating was energy saving in comparison with central heating when the heating intensity of the COHSBOEES was 70 W/m^2 and the on-demand heating rate was less than 73.0%, and the off-peak electricity energy storage for heating was energy saving at any on-demand heating rate when the COHSBOEES had a heating intensity of 50 W/m^2. After the COHSBOEES has been running for three complete heating seasons, when the off-peak electricity price was 0.25 yuan/kW·h, the energy consumption cost of the COHSBOEES can be saved by 77.6% in comparison with central heating. 展开更多
关键词 energy STORAGE ON-DEMAND HEATING off-peak electricity HEATING CHARACTERISTICS heat STORAGE CHARACTERISTICS
Community structure and carbon and nitrogen storage of sagebrush desert under grazing exclusion in Northwest China 认领
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作者 DONG Yiqiang SUN Zongjiu +2 位作者 AN Shazhou JIANG Shasha WEI Peng 《干旱区科学:英文版》 SCIE CSCD 2020年第2期239-251,共13页
Overgrazing is regarded as one of the key factors of vegetation and soil degradation in the arid and semi-arid regions of Northwest China.Grazing exclusion(GE)is one of the most common pathways used to restore degrade... Overgrazing is regarded as one of the key factors of vegetation and soil degradation in the arid and semi-arid regions of Northwest China.Grazing exclusion(GE)is one of the most common pathways used to restore degraded grasslands and to improve their ecosystem services.Nevertheless,there are still significant controversies concerning GE’s effects on grassland diversity as well as carbon(C)and nitrogen(N)storage.It remains poorly understood in the arid desert regions,whilst being essential for the sustainable use of grassland resources.To assess the effects of GE on community characteristics and C and N storage of desert plant community in the arid desert regions,we investigated the community structure and plant biomass,as well as C and N storage of plants and soil(0-100 cm depth)in short-term GE(three years)plots and adjacent long-term freely grazing(FG)plots in the areas of sagebrush desert in Northwest China,which are important both for spring-autumn seasonal pasture and for ecological conservation.Our findings indicated that GE was beneficial to the average height,coverage and aboveground biomass(including stems,leaves and inflorescences,and litter)of desert plant community,to the species richness and importance values of subshrubs and perennial herbs,and to the biomass C and N storage of aboveground parts(P<0.05).However,GE was not beneficial to the importance values of annual herbs,root/shoot ratio and total N concentration in the 0-5 and 5-10 cm soil layers(P<0.05).Additionally,the plant density,belowground biomass,and soil organic C concentration and C storage in the 0-100 cm soil layer could not be significantly changed by short-term GE(three years).The results suggest that,although GE was not beneficial for C sequestration in the sagebrush desert ecosystem,it is an effective strategy for improving productivity,diversity,and C and N storage of plants.As a result,GE can be used to rehabilitate degraded grasslands in the arid desert regions of Northwest China. 展开更多
关键词 GRAZING EXCLUSION DESERT plant community biomass C STORAGE N STORAGE FENCING arid DESERT regions
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Sodium decorated net-Y nanosheet for hydrogen storage and adsorption mechanism:A first-principles study 认领
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作者 王云蕾 陈玉红 王允辉 《中国物理B:英文版》 SCIE EI CAS CSCD 2020年第1期393-397,共5页
Using first-principles calculations based on density functional theory(DFT),we investigate the potential hydrogen storage capacity of the Na-decorated net-Y single layer nanosheet.For double-side Na decoration,the ave... Using first-principles calculations based on density functional theory(DFT),we investigate the potential hydrogen storage capacity of the Na-decorated net-Y single layer nanosheet.For double-side Na decoration,the average binding energy is 1.54 eV,which is much larger than the cohesive energy of 1.13 eV for bulk Na.A maximum of four H2 molecules can be adsorbed around each Na with average adsorption energies of 0.25–0.32 eV/H2.Also,H2 storage gravimetric of 8.85 wt%is obtained,and this meets the U.S.Department of Energy(DOE)ultimate target.These results are instrumental in seeking a promising hydrogen energy carrier. 展开更多
关键词 hydrogen STORAGE net-Y STORAGE gravimetric density functional theory
Building a Cloud-Based Energy Storage System through Digital Transformation of Distributed Backup Battery in Mobile Base Stations 认领
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作者 Song Ci Yanglin Zhou +2 位作者 Yuan Xu Xingjian Diao Junwei Wang 《中国通信:英文版》 SCIE CSCD 2020年第4期42-50,共9页
Battery energy storage systems(ESS) have been widely used in mobile base stations(BS) as the main backup power source. Due to the large number of base stations, massive distributed ESSs have largely stayed in idle and... Battery energy storage systems(ESS) have been widely used in mobile base stations(BS) as the main backup power source. Due to the large number of base stations, massive distributed ESSs have largely stayed in idle and very difficult to achieve high asset utilization. In recent years, the fast-paced development of digital energy storage(DES) technology has revolutionized the traditional operation and maintenance of ESSs by transforming them into digital assets, further enabling battery energy storage services, raising up a new way to achieve a much higher utilization of such kind of largely idle ESS resources. In this paper, the disruptive DES technology will be introduced and its application under the context of mobile BSs will be studied, and then a cloud-based energy storage(CES) platform is proposed based on a large scale distributed DESs to provide a new cyber-enabled energy storage service to the local utility company. A real-world case study shows the effectiveness and efficiency of the CES platform. 展开更多
关键词 digital energy storage dynamic reconfigurable battery network energy digitization software-defined battery system cloud energy storage
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低温贮藏对‘四季桃’番石榴果实采后生理和品质的影响 认领
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作者 乔健 杜丽清 +3 位作者 李国鹏 魏长宾 刘家豪 李甜子 《热带农业科学》 2020年第3期49-54,共6页
番石榴果实以风味独特、营养丰富而深受消费者喜欢,但番石榴果实不耐贮藏的特性限制了其长时间贮藏及长距离运输。本研究以‘四季桃’番石榴为材料,研究不同温度的贮藏条件下,番石榴果实贮藏过程中果实失重率、乙烯释放量、果实果皮色... 番石榴果实以风味独特、营养丰富而深受消费者喜欢,但番石榴果实不耐贮藏的特性限制了其长时间贮藏及长距离运输。本研究以‘四季桃’番石榴为材料,研究不同温度的贮藏条件下,番石榴果实贮藏过程中果实失重率、乙烯释放量、果实果皮色泽、可溶性固形物、可滴定酸及VC含量等理化与营养指标的变化。结果表明:4℃低温的贮藏条件能显著地延缓‘四季桃’番石榴果实的成熟衰老进程,乙烯释放量高峰的时间较室温贮藏要晚3 d,并且低温能显著抑制果实果皮的黄化速度;在贮藏6 d时,低温贮藏条件下的‘四季桃’番石榴果实的可溶性固形物比室温(20℃)贮藏的低6.08%。因此,4℃的低温贮藏能很好的保持‘四级桃’番石榴果实的果实外观品质和营养品质。 展开更多
关键词 番石榴 低温 贮藏温度 果实品质 采后保鲜
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Network security protection technology for a cloud energy storage network controller 认领
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作者 Tao Yan Jialiang Liu +3 位作者 Qianqian Niu Jizhong Chen Shaohua Xu Meng Niu 《全球能源互联网:英文版》 2020年第1期86-98,共13页
As part of the ongoing information revolution,smart power grid technology has become a key focus area for research into power systems.Intelligent electrical appliances are now an important component of power systems,p... As part of the ongoing information revolution,smart power grid technology has become a key focus area for research into power systems.Intelligent electrical appliances are now an important component of power systems,providing a smart power grid with increased control,stability,and safety.Based on the secure communication requirements of cloud energy storage systems,this paper presents the design and development of a node controller for a cloud energy storage network.The function division and system deployment processes were carried out to ensure the security of the communication network used for the cloud energy storage system.Safety protection measures were proposed according to the demands of the communication network,allowing the system to run safely and stably.Finally,the effectiveness of the system was verified through a client-side distributed energy storage demonstration project in Suzhou,China.The system was observed to operate safely and stably,demonstrating good peak-clipping and valley filling effects,and improving the system load characteristics. 展开更多
关键词 CLOUD ENERGY STORAGE system NODE CONTROLLER Network security Smart grid Distributed ENERGY STORAGE
Review on carbon storage estimation of forest ecosystem and applications in China 认领
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作者 Wanlong Sun Xuehua Liu 《森林生态系统:英文版》 SCIE CSCD 2020年第1期37-50,共14页
Background:The accuracy in estimating forest ecosystem carbon storage has drawn extensive attention of researchers in the field of global climate change.However,incomparable data sources and various estimation methods... Background:The accuracy in estimating forest ecosystem carbon storage has drawn extensive attention of researchers in the field of global climate change.However,incomparable data sources and various estimation methods have led to significant differences in the estimation of forest carbon storage at large scales.Methods:In this study,we reviewed fundamental types of forest carbon storage estimation methods and their applications in China.Results:Results showed that the major forest carbon storage estimation methods were classified into 3 major categories and 15 subcategories focusing on vegetation carbon storage estimation,soil carbon storage estimation,and litter carbon storage estimation,respectively.The application in China showed that there have been 3 development stages of research in China since the 1990s.Studies of forest carbon storage estimation in province scales were conducted more frequently in the northeastern,eastern and southwestern provinces such as Zhejiang,Heilongjiang and Sichuan with high forest coverage or large forest area.Inventory-based methods,soil type method,and biomass model were the main forest estimation methods used in China,focusing on vegetation,soil and litter carbon storage estimation respectively.Total forest carbon storage of China was approximate 28.90 Pg C,and the average vegetation carbon density(42.04±5.39 Mg·ha?1)was much lower than that of the whole world(71.60 Mg·ha?1).Vegetation carbon density from average biomass method was the highest(57.07 Mg·ha?1)through comparing nine types of vegetation carbon storage estimation methods applied during 1989 to 1993.Conclusions:Many studies on forest carbon storages have been carried out in China at patch scales or regional scales.These efforts enabled the research of forest carbon storage to reach a relatively advanced stage.Meanwhile,the accumulation of massive research data provides the basis for subsequent research work.Some challenges are also existing.This review could provide a reference for more accurate estimation of fo 展开更多
关键词 FOREST ECOSYSTEM FOREST CARBON STORAGE ESTIMATION CARBON STORAGE China
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HGeoHashBase: an optimized storage model of spatial objects for location-based services 认领
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作者 Jingwei ZHANG Chao YANG +2 位作者 Qing YANG Yuming LIN Yanchun ZHANG 《中国计算机科学前沿:英文版》 SCIE EI CSCD 2020年第1期208-218,共11页
Many location-based services need to query objects existing in a specific space,such as location-based tourism resource recommendation.Both a large number of spatial objects and the real-time object access requirement... Many location-based services need to query objects existing in a specific space,such as location-based tourism resource recommendation.Both a large number of spatial objects and the real-time object access requirements of location-based services pose a big challenge for spatial object storage and query management.In this paper,we propose HGeoHashBase,an improved storage model by integrating GeoHash with key-value structure,to organize spatial objects for efficient range queries.GeoHash is responsible for spatial encoding and key-value structure as underlying data storage.Both the similarity of the encodings for objects in the close geographical locations and the multi-version data mechanism are blended into the proposed model well.Considering the tradeoff between encoding precision and query performance,a theoretical proof is presented.Extensive experiments are designed and conducted,whose results show that the proposed model can gain significant performance improvement. 展开更多
关键词 location-based services distributed storage model storage and access optimization
Management of Treated Wastewater and Flood Water Using GIS for Environmental Protection in Jordan 认领
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作者 Ghaida Abdallat Enas Harahshah Elias Salameh 《地球科学和环境保护期刊(英文)》 2020年第1期86-100,共15页
Management of various water resources has become a pivotal need for all catchments and sub-catchements in Jordan. Storing treated wastewater applied in reservoirs that originally constructed to store flood and base fl... Management of various water resources has become a pivotal need for all catchments and sub-catchements in Jordan. Storing treated wastewater applied in reservoirs that originally constructed to store flood and base flow water in the country. This practice has proved detrimental to the originally good quality reservoir waters, leading to additional water quality deterioration such as eutrophication issue. Hence, separating treated wastewater from flood and base flow waters to guarantee the availability of better quality waters for higher quality uses such as drinking or recreation. This study focuses on the dams constructed in Kafrain and Shueib catchments, lying west and northwest of Amman. The results of hydrological, hydrogeological, geological, water quality and terrain measurements using Remote Sensing, Geographical Information System (GIS) and Digital Elevation Models (DEM) show that there are nine potential dam sites in the two catchments to construct. In Shueib catchment, two proposed dam sites were selected as suitable dams for fresh water harvesting and groundwater artificial recharge. While, two suggested dam sites are located downstream of Al-Salt and Fuhais wastewater treatment plants for treated wastewater collection. In Kafrain catchment, three proposed dam sites were selected as suitable dams for fresh water harvesting and groundwater artificial recharge. Whereas, two suggested dam sites are located downstream of Wadi Sir wastewater treatment plant, hereby, it can be used to collect the treated wastewater. The study is expected to serve as an example for other catchments in Jordan and elsewhere, especially in water scarcity areas where treated waste water is stored together with flood and base flow waters. 展开更多
关键词 Base FLOW JORDAN Storage TREATED WASTEWATER FLOOD FLOW
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Synthesis and characterization of salt-impregnated anodic aluminum oxide composites for low-grade heat storage 认领
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作者 Bengisu Yilmaz Behiye Yüksel +2 位作者 G?khan Orhan Devrim Aydin Zafer Utlu 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2020年第1期112-118,共7页
Thermochemical heat storage(THS)systems have recently attracted a lot of attention in research and development.In this study,an anodic aluminum oxide(AAO)template,fabricated by a two-step anodization method,was used f... Thermochemical heat storage(THS)systems have recently attracted a lot of attention in research and development.In this study,an anodic aluminum oxide(AAO)template,fabricated by a two-step anodization method,was used for the first time as the matrix material for a THS system.Different salts were studied as thermochemical materials for their suitability in low-grade heat storage application driven by solar energy for an open system.Compositions were prepared by absorbing CaCl2,MgCl2,LiCl,LiNO3 and mixtures of these salts under a vacuum in an AAO matrix.Field Emission Scanning Electron Microscopy was used to examine the morphology of the produced AAO composites.Thermal energy storage capacities of the composites were characterized using a differential scanning calorimeter.Characterization analysis showed that anodized Al plates were suitable matrix materials for THS systems,and composite sorbent prepared with a 1:1 ratio LiCl/LiNO3 salt mixture had the highest energy value among all composites,with an energy density of 468.1 k J·kg-1. 展开更多
关键词 thermal energy STORAGE SALT IMPREGNATION THERMOCHEMICAL heat STORAGE ANODIZING SALT in matrix
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过热蒸汽处理对米糠营养性质和储藏稳定性的影响 认领
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作者 罗舜菁 胡迪 +4 位作者 黄克愁 吴建永 胡秀婷 郭宝忠 刘成梅 《中国食品学报》 EI CAS CSCD 北大核心 2020年第5期213-221,共9页
采用120~160℃的过热蒸汽(SS)处理米糠1~5 min,以脂肪酶活性为指标,选取钝化脂肪酶效果好的米糠样品,以原米糠为对照,考察SS处理对米糠的营养性质(总酚含量、总抗氧化性、酚酸组成变化、α-生育酚含量、γ-谷维素含量)和储藏稳定性(脂... 采用120~160℃的过热蒸汽(SS)处理米糠1~5 min,以脂肪酶活性为指标,选取钝化脂肪酶效果好的米糠样品,以原米糠为对照,考察SS处理对米糠的营养性质(总酚含量、总抗氧化性、酚酸组成变化、α-生育酚含量、γ-谷维素含量)和储藏稳定性(脂肪酸值、过氧化值、羰基值)的影响。结果表明:经120,130,140,150,160℃的SS分别处理4,4,3,3 min和2 min后米糠脂肪酶活性不再发生显著变化,此时的米糠称为最佳钝酶点米糠,其脂肪酶活性分别降至30.99%~13.41%。与原米糠相比,最佳钝酶点米糠的总酚含量、总抗氧化性、总酚酸含量显著提高,且主要贡献为阿魏酸和对羟基苯甲酸的显著增加;α-生育酚和γ-谷维素含量无显著降低。SS处理显著提高了米糠的稳定性,在第25周时,最佳钝酶点米糠的脂肪酸值、过氧化值、羰基值分别只有BR的36.0%~21.9%、50.0%~44.3%、30.3%~22.1%,有效延长了米糠储藏期。综合考虑米糠营养性质和储藏稳定性,在130℃,4 min处理条件下获得的米糠最佳。 展开更多
关键词 过热蒸汽 米糠 脂肪酶 营养性质 储藏
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柑橘果皮角质层及其对采后贮藏保鲜影响的研究进展 认领
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作者 杨绿竹 王馨雨 +3 位作者 王蓉蓉 单杨 张群 丁胜华 《食品科学》 EI CAS CSCD 北大核心 2020年第7期234-244,共11页
柑橘果实具有季节性且采后易被霉菌感染发生腐烂,对柑橘产业造成巨大的经济损失。在柑橘果皮表面覆着一层疏水性角质层,具有防止非气孔性水分散失、抵御病原菌入侵、控制气体交换等多种功能,对采后贮藏有重要作用。本文综述了角质层的... 柑橘果实具有季节性且采后易被霉菌感染发生腐烂,对柑橘产业造成巨大的经济损失。在柑橘果皮表面覆着一层疏水性角质层,具有防止非气孔性水分散失、抵御病原菌入侵、控制气体交换等多种功能,对采后贮藏有重要作用。本文综述了角质层的组成、结构、生物合成及其在柑橘贮藏中的作用,以期为角质层的基础研究和柑橘的贮藏保鲜提供理论参考。 展开更多
关键词 柑橘 角质层 功能 采后 贮藏
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Battery Technologies for Grid-Level Large-Scale Electrical Energy Storage 认领
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作者 Xiayue Fan Bin Liu +8 位作者 Jie Liu Jia Ding Xiaopeng Han Yida Deng Xiaojun Lv Ying Xie Bing Chen Wenbin Hu Cheng Zhong 《天津大学学报:英文版》 EI CAS 2020年第2期92-103,共12页
Grid-level large-scale electrical energy storage(GLEES) is an essential approach for balancing the supply–demand of electricity generation, distribution, and usage. Compared with conventional energy storage methods, ... Grid-level large-scale electrical energy storage(GLEES) is an essential approach for balancing the supply–demand of electricity generation, distribution, and usage. Compared with conventional energy storage methods, battery technologies are desirable energy storage devices for GLEES due to their easy modularization, rapid response, flexible installation, and short construction cycles. In general, battery energy storage technologies are expected to meet the requirements of GLEES such as peak shaving and load leveling, voltage and frequency regulation, and emergency response, which are highlighted in this perspective. Furthermore, several types of battery technologies, including lead–acid, nickel–cadmium, nickel–metal hydride, sodium–sulfur, lithium-ion, and flow batteries, are discussed in detail for the application of GLEES. Moreover, some possible developing directions to facilitate efforts in this area are presented to establish a perspective on battery technology, provide a road map for guiding future studies, and promote the commercial application of batteries for GLEES. 展开更多
关键词 BATTERY TECHNOLOGIES Grid-level LARGE-SCALE ELECTRICAL energy storage Peak shaving and load leveling Voltage and frequency regulation Emergency response
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Graphitic Carbon Quantum Dots Modified Nickel Cobalt Sulfide as Cathode Materials for Alkaline Aqueous Batteries 认领
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作者 Yirong Zhu Jingying Li +6 位作者 Xiaoru Yun Ganggang Zhao Peng Ge Guoqiang Zou Yong Liu Hongshuai Hou Xiaobo Ji 《纳微快报:英文版》 SCIE EI CAS CSCD 2020年第2期1-18,共18页
Carbon quantum dots(CQDs)as a new class of emerging materials have gradually drawn researchers’concern in recent years.In this work,the graphitic CQDs are prepared through a scalable approach,achieving a high yield w... Carbon quantum dots(CQDs)as a new class of emerging materials have gradually drawn researchers’concern in recent years.In this work,the graphitic CQDs are prepared through a scalable approach,achieving a high yield with more than 50%.The obtained CQDs are further used as structure-directing and conductive agents to synthesize novel N,S-CQDs/NiCo2S4 composite cathode materials,manifesting the enhanced electrochemical properties resulted from the synergistic effect of highly conductive N,S-codoped CQDs offering fast electronic transport and unique micro-/nanostructured NiCo2S4 microspheres with Faradaic redox characteristic contributing large capacity.Moreover,the nitrogen-doped reduced graphene oxide(N-rGO)/Fe2O3 composite anode materials exhibit ultrahigh specific capacity as well as significantly improved rate property and cycle performance originating from the high-capacity prism-like Fe2O3 hexahedrons tightly wrapped by highly conductive N-rGO.A novel alkaline aqueous battery assembled by these materials displays a specific energy(50.2 Wh kg^?1),ultrahigh specific power(9.7 kW kg^?1)and excellent cycling performance with 91.5%of capacity retention at 3 A g^?1 for 5000 cycles.The present research offers a valuable guidance for the exploitation of advanced energy storage devices by the rational design and selection of battery/capacitive composite materials. 展开更多
关键词 Energy storage ALKALINE AQUEOUS BATTERIES Carbon quantum dot NICKEL COBALT SULFIDE
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不同处理对磨盘柿冷藏及货架期品质与生理的影响 认领
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作者 张鹏 康丹丹 +1 位作者 李江阔 魏宝东 《食品科技》 CAS 北大核心 2020年第2期42-49,共8页
以磨盘柿为试材,用浓度为1.0 μL/L的1-MCP处理,用高浓度CO2(85%~90%)处理24 h,探究不同处理方式(CO2脱涩、1-MCP处理后CO2脱涩、1-MCP与CO2脱涩同时处理)对冷藏及冷藏后货架期果实的品质与生理影响。结果表明,与CO2脱涩相比较,1-MCP处... 以磨盘柿为试材,用浓度为1.0 μL/L的1-MCP处理,用高浓度CO2(85%~90%)处理24 h,探究不同处理方式(CO2脱涩、1-MCP处理后CO2脱涩、1-MCP与CO2脱涩同时处理)对冷藏及冷藏后货架期果实的品质与生理影响。结果表明,与CO2脱涩相比较,1-MCP处理后CO2脱涩可以有效降低柿果呼吸强度,抑制乙烯生成速率、柿果色泽的改变,延缓柿果质地的降低,维持果实营养物质(TSS、TA及Vc含量)在较高水平,有效减缓了挥发性香气成分的减弱。但1-MCP与CO2脱涩同时处理却加速了果实成熟且贮藏后期差异显著(P<0.05)。因此,柿果经1-MCP处理后再高浓度CO2脱涩不仅可脱涩还具有较好的保鲜效果。 展开更多
关键词 磨盘柿 CO2脱涩 贮藏 1-MCP 品质
鱼精蛋白复配保鲜剂对南美白对虾的保鲜效果 认领
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作者 张家源 张洪才 陈舜胜 《食品与发酵工业》 CAS CSCD 北大核心 2020年第2期142-149,共8页
以南美白对虾为原料,探究鱼精蛋白-壳聚糖复配保鲜剂的保鲜效果。通过对pH值、硫代巴比妥酸值(TBA)、持水力、菌落总数(TBC)、K值、挥发性盐基氮(TVB-N)、色差、感官评价等指标的考察,分别比较了1%(体积分数)醋酸(CK)、0.01 g/mL壳聚糖(... 以南美白对虾为原料,探究鱼精蛋白-壳聚糖复配保鲜剂的保鲜效果。通过对pH值、硫代巴比妥酸值(TBA)、持水力、菌落总数(TBC)、K值、挥发性盐基氮(TVB-N)、色差、感官评价等指标的考察,分别比较了1%(体积分数)醋酸(CK)、0.01 g/mL壳聚糖(CTS)、0.005 g/mL鱼精蛋白(PTM)、0.01 g/mL壳聚糖+0.001 g/mL鱼精蛋白(CP1)、0.01 g/mL壳聚糖+0.003 g/mL鱼精蛋白(CP2)、0.01 g/mL壳聚糖+0.005 g/mL鱼精蛋白(CP3)对冷藏(4℃)南美白对虾的保鲜效果。结果表明,与对照组(CK)相比,鱼精蛋白和壳聚糖复配处理组具有良好的抗菌和抗氧化作用,能有效抑制微生物的生长,延长对虾的保质期,其中0.01 g/mL壳聚糖+0.003 g/mL组(CP2)能更有效地抑制pH值、TBA、TBC、K值、TVB-N的上升和持水力的下降,但CP1、CP2和CP3在色差和感官评定中无显著性差异。综合分析CP2组为有效保鲜组。 展开更多
关键词 鱼精蛋白 壳聚糖 南美白对虾 贮藏 保鲜
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Capacitive charge storage enables an ultrahigh cathode capacity in aluminum-graphene battery 认领
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作者 Hanyan Xu Hao Chen +5 位作者 Haiwen Lai Zheng Li Xiaozhong Dong Shengying Cai Xingyuan Chu Chao Gao 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第6期40-44,I0002,共6页
Aluminum^-graphene battery is promising for its abundant raw materials,high power density,ultralong cycle life and superior safety.However,the development of aluminum^-graphene battery is currently restricted by its i... Aluminum^-graphene battery is promising for its abundant raw materials,high power density,ultralong cycle life and superior safety.However,the development of aluminum^-graphene battery is currently restricted by its insufficient cathode capacity,calling for a newly developed working mechanism.In addition,an irregular constant increase of the cathode capacity was always observed during cycling,but cannot be explained based on the current understanding.Here,we observed an increase of specific capacity by 60%with stable Coulombic efficiency of 98%during 7000 cycles life of Al-graphene batteries employing AlCl3/ET3NHCl electrolyte.We demonstrated this growing cathode capacity is attributed to an increasing contribution of capacitive charge storage during cycling,because a gradually enlarged surface area as capacitive active sites is enabled by the exfoliation of graphitic cathode during the periodic intercalation process.Moreover,the graphene cathode was exfoliated more significantly in AlCl3/ET3NHCl than 1-ethyl-3-methylimidazolium chloride-based electrolyte,which results from the heavier stress on the graphene layers caused by the larger intercalants in AlCl3/ET3NHCl.The common intercalation of cations with AlCl4-clusters was therefore supposed to occur during charging.This new proposed mechanism can offer the new thought for future design on high-capacity cathode of Al-ion battery. 展开更多
关键词 Al-graphene battery Intercalated graphene Capacitive charge storage Increasing capacity EXFOLIATION
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A Review of Reservoir Sedimentation Control and Storage Capacity Recovery 认领
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作者 Anjun DENG Jianguo CHEN +1 位作者 Haihua HU Hongling SHI 《气象与环境研究:英文版》 CAS 2020年第1期10-15,共6页
There are many reservoirs in China,and serious reservoir sedimentation affects reservoir function and reservoir safety.It is of great significance for restoring the reservoir capacity,improving the efficiency of the r... There are many reservoirs in China,and serious reservoir sedimentation affects reservoir function and reservoir safety.It is of great significance for restoring the reservoir capacity,improving the efficiency of the reservoir and prolonging the service life of the reservoir to carry out the research on reservoir sedimentation control and storage capacity recovery technology,in the case of fewer and fewer good dam sites suitable for the construction of the reservoir and the increasing accumulation of reservoir sedimentation.In this paper,influence factor of the storage loss,sedimentation control and reservoir capacity recovery technology in China are briefly reviewed.It is necessary to carry out research work on reservoir sedimentation investigation and reservoir siltation mechanism and control measures. 展开更多
关键词 RESERVOIR SILTATION LOSS CONTROL Storage capacity RECOVERY REVIEW
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二氧化氯处理对贡柑采后贮藏品质的影响 认领
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作者 徐呈祥 郑福庆 +1 位作者 马艳萍 李秀梅 《食品与发酵工业》 CAS CSCD 北大核心 2020年第3期201-206,共6页
为探究二氧化氯(ClO 2)处理在贡柑果实采后贮藏中的防腐保鲜作用,设计不处理、水处理及5、10、15、20 mg/L ClO2溶液分别浸果处理5min,装入塑料薄膜保鲜袋中在自然室温下贮藏90d,期间于0、15、30、45、60、75、90d时分别测试分析了各处... 为探究二氧化氯(ClO 2)处理在贡柑果实采后贮藏中的防腐保鲜作用,设计不处理、水处理及5、10、15、20 mg/L ClO2溶液分别浸果处理5min,装入塑料薄膜保鲜袋中在自然室温下贮藏90d,期间于0、15、30、45、60、75、90d时分别测试分析了各处理果实贮藏品质的响应与差异。结果表明,不同浓度ClO2溶液浸果处理,均可不同程度地抑制贮藏期间贡柑果实可溶性糖、可滴定酸及维生素C(Vc)含量的下降,对贮藏中贡柑果实的失重和腐烂尤其具预防和抑制作用,其中ClO2浓度达15mg/L及其以上的处理,各项指标均与不处理、水处理有显著性差异(P<0.05)。该研究结果为贡柑果实绿色防腐保鲜提供了技术参考,可在采后商品化实践中应用。 展开更多
关键词 贡柑 贮藏 二氧化氯 防腐保鲜
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