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CSEE Journal of Power and Energy Systems 2021年第3期7卷 614-621页

作者： Jiayu Xu Xuebao Li Xiang Cui Zhibin Zhao shenyang Mo Bing Ji State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China School of Engineering University of LeicesterLeicester LE17RHUK

Silicone gel is a prevailing material for encapsulation in insulated gate bipolar transistor(IGBT)power *** space charge transport behavior in silicone gel is significant to evaluate the electrical insulation *** paper focuses on the trap characteristics and electrical properties of the silicone gel,which were rarely studied *** experiments are performed on the surface potential decay of silicone gel after the charge ***,the energy distributions of electron or hole traps are determined by a double-trap energy level model,which can be fitted by the Gaussian *** addition,the mobilities of positive and negative charges are determined,which are 1.38×10^(-12) m^(2)·V^(-1)·s^(-1) and 1.74×10^(12) m^(2)·V^(-1)·s^(-1),***,considering the heat as a byproduct resulting in thermal issues,the temperature-dependence of surface potential decay characteristics are also studied in this *** temperature rises,the decay rate of surface potential increases,especially when the temperature is higher than 80℃.Finally,the contrastive analysis illustrates that the trap characteristics of silicone gel are between the trap characteristics in liquid-state material and solid-state material,which supports the phenomenon that silicone gel is more resistive to the sharp edges in power *** work can provide a useful reference for the design of encapsulation in high-voltage IGBT power modules.

关键词： Charge mobility IGBT power modules silicone gel temperature-dependence trap characteristic

The research of Environment Perception based on the Cooperation of Multi-robot

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The Research of Environment Perception based on the Cooperat...

Study of the Preparation Technology and Mechanics of the Compound Temperature-Humidity Sensor

第24届中国控制与决策会议

作者： Cheng Liying 1, 2, 3 , Xue Dingyu 1 , Cong Yang 3 , Jiang Xuehui 4 , Zhao Shuying 1, 3 1. College of Science and Engineering, Northeasten University, shenyang 110004, china2. shenyang Normal University, shenyang 110034, china 3. State Key Laboratory of Robotics, shenyang institute of Automation, Chinese Academy of Science, shenyang 110016, china 4. design and research institute of Liaoning Local Hydyo-power, shenyang 110004, china

The environment perception is the basis to the decision and planning of multi-robot system. It analyzed the latest progress of information fusion, the simultaneous localization and mapping （SLAM） which are the two key techniques. And it discussed the methods of information fusion and SLAM, and then concluded the advantages and disadvantages of these methods for the cooperative SLAM of multi-robot. Finally, the further research for CSLAM is raised.

关键词： Environment Perception Cooperative SLAM SLAM Information Fusion Multiple Mobile Robots

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稀有金属材料与工程 2006年第S3期 375-376页

作者： Jing Huang~1 Yuezhou Zhang~2 Hong Lin~2 (1.College of Informatics and Electronics,Zhejiang University of Sci.& Tech.,Hangzhou 310018,china) (2.shenyang institute of Instrumentation,shenyang 110043,china)

The development and character of compound temperature-humidity sensor were discussed in this *** design of sampling,control and output unit of temperature-humidity sensor as well as their manufacture method and character were studied in *** relationship between components of humidity resistance materials and negative temperature coefficient ( NTC) thermistor materials in sampling unit of compound sensor and character of electrical resistance and temperature was *** of character curves of compound temperature-humidity sensor and data of materials of sampling unit were shown in this paper too.

关键词： compound temperature-humidity sensor compensation of humidity embedded system network output

Some Thoughts on the Preservation of Historical and Cultural Cities

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china City Planning Review 1990年第1期7卷 53-58页

作者： Wang Chonghua Zhang Pihe shenyang Municipal institute of Urban Planning and design

Through the concepts in the preservation plan for the historical and cultural city of shenyang,this paper at-tempts to discuss and explore various issues such as the understanding and implementation,contents and concepts,preservation and development,heritage and redevleopment of the historical and cultural city,with a hope to providethis profound topic some references for *** the economic and cultural development of the country,more and more attention has been paid to the pres-ervation and the utilization of the historical and cultural *** is one of the second group of the historicalcities designated by the State Council in *** plan and protective measures are now being formulatedfor this *** following paragraphs outline some views in respect of the preservation of historical and cultural cities.

关键词： Some Thoughts on the Preservation of Historical and Cultural Cities

STUDY ON THE POST BUCKLING AND DURABILITY/DAMAGE TOLERANCE OF COMPOSITE STIFFENED PANELS WITH DIFFERENT THICKNESS

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STUDY ON THE POST BUCKLING AND DURABILITY/DAMAGE TOLERANCE O...

Effect of calcitonin gene-related peptide and nerve growth factor on spatial learning and memory abilities of rats following focal cerebral ischemia/reperfusion

作者： Li Gelan ,Wu Bin , Liu Jun, Huang Baozong shenyang Airplane design institute, shenyang, Liaoning 110000, china Northeastern University, shenyang, Liaoning 110006 , china

＜正＞The postbuckling carrying capacity and durability/impact damage tolerance of composite stiffened panels were studied by numerical modeling and experiments. Both numerical and experimental results show that the composite laminated stiffened panels have a considerable postbuckling carrying capacity and good durability/damage tolerance after low velocity impact.

关键词： Composite stiffened panel Postbuckling carrying capacity Durability Impact damage

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Neural Regeneration research 2006年第8期1卷 673-676页

作者： Guangshun Zheng1, Yongjie Yang2, Xiubin Fang3 1Department of Neurosurgery, Second Hospital of Xiamen, Xiamen 361021, Fujian Province, china 2Department of Neurosurgery, Second Hospital Affiliated to china Medical University, shenyang 110004, Liaoning Province, china 3Department of Neurobiology, Basic Medical College of china Medical University, shenyang 110001, Liaoning Province, china Department of Neurosurgery Second Hospital of Xiamen Xiamen 361021 Fujian Province China Department of Neurosurgery China Medical University Shenyang 110004 Liaoning Province China Department of Neurobiology Basic Medical College China Medical University Shenyang 110001 Liaoning Province China

BACKGROUND: Calcitonin gene-related peptide (CGRP) and nerve growth actor (NGF) cam improve spatial learning and memory abilities of rats with cerebral ischemia/reperfusion; however, the effect of combination of them on relieving learning and memory injury following cerebral ischemia/reperfusion should be further studied. OBJECTIVE: To study the effects of exogenous CGRP and NGF on learning and memory abilities of rats with focal cerebral ischemia/reperfusion. design: Randomized controlled animal study. SETTING: Department of Neurosurgery, the Second Hospital of Xiamen; Department of Neurosurgery, the Second Affiliated Hospital of china Medical University; Department of Neurobiology, Basic Medical College of china Medical University. MATERIALS: A total of 30 healthy male SD rats, aged 8 weeks, of clean grade, weighing 250-300 g, were provided by Experimental Animal Department of china Medical University. All rats were randomly divided into sham-operation group, ischemia/reperfusion group and treatment group with 10 in each group. The main reagents were detailed as the follows: 100 g/L chloral hydrate, 0.5 mL CGRP (2 mg/L, Sigma Company, USA), and NGF (1× 106 U/L, 0.5 mL, Siweite Company, Dalian). METHODS: The experiment was carried out in the Department of Neurobiology, Basic Medical College of china Medical University from February to July 2005. Rat models of middle cerebral artery occlusion were established by method of occlusion, 2 hours after that rats were anesthetized and the thread was slightly drawn out for 10 mm under direct staring to perform reperfusion. Rats in the ischemia/reperfusion group received intraperitoneal injection of 1 mL saline via the abdomen at two hours later, while rats in the treatment group at 2 hours later received intraperitoneal injection of 2 mg/L CGRP (0.5 mL) and 1×106 U/L NGF (0.5 mL) once a day for 10 successive days. First administration was accomplished within 15 minutes after ischemia/reperfusion. Rats in the sham-operation

关键词： Effect of calcitonin gene-related peptide and nerve growth factor on spatial learning and memory abilities of rats following focal cerebral ischemia/reperfusion CGRP MCAO gene

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薄壁卷圆管自定心夹具结构优化设计

湖北工业大学学报 2024年第2期39卷 43-48页

作者：戴彬钱应平薛杭车沈炀湖北工业大学机械工程学院湖北武汉430068

为满足不同直径、长度、厚度规格的圆筒类工件焊接过程中的装夹需要并减轻其夹具的质量。通过自定心夹具的结构设计及受力分析,建立夹具结构的有限元模型,并使用有限元分析获得夹具的静态特性。在此基础上利用尺寸优化的设计方法,对其... 详细信息

为满足不同直径、长度、厚度规格的圆筒类工件焊接过程中的装夹需要并减轻其夹具的质量。通过自定心夹具的结构设计及受力分析,建立夹具结构的有限元模型,并使用有限元分析获得夹具的静态特性。在此基础上利用尺寸优化的设计方法,对其进行了以减轻质量为目标的优化设计,最终完成了对V型夹具的轻量化设计。将优化后的V型夹具与优化前进行比较,结果显示:在夹具最大变形量小于0.5 mm且最大应力值小于156 MPa的情况下,单个V型块的质量由初始设计时的33.854 kg减小到了14.954 kg,减轻了55.83%。通过尺寸优化设计,减轻了夹具质量,提高了夹具的工作性能,该研究结果可对圆管直缝焊接设备的夹具相关研究提供参考。

关键词：自动定心夹具受力分析 V型夹具优化设计

Behavioral fragmentation of waterfowl habitat and its landscape ecological design in Shuangtai-hekou Reserve,Liaoning,china

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Journal of Environmental Sciences 1999年第2期11卷 104-108页

作者： Hu Yuan man, Xiao Du ning institute of Applied Ecology, Chinese Academy of Sciences, shenyang 110015, china

Behavioral fragmentation of wildlife habitat is discussed. Using “buffer” module in ARC/INFO, behavioral fragmentation habitat of Red crowned crane, Saunders gull, Oriental white stork and Siberian white crane was calculated in the Shuangtai hekou National Reserve, Liaoning Province, china. The result showed that breeding Red crowned crane, Siberian white crane and breeding Saunders gull are very sensitive to fragmentation factors. Suitable habitat is so little for more than 2000 Saunders gull to breed. The reserve only has a capacity of 38 pairs for breeding Red crowed crane. Two key measures were made. First, dismantles all the abandoned oil wells and recovers the original ecosystem to decrease the fragmentation effect, directly benefit to breeding or migration of Red crowned crane and Oriental white stork. Second, recovers the Suaeda tidal mud flat from artificial shrimp and crab pond in the kernel zone of the reserve to enlarge the habitat area of Saunders gull and Siberian white crane.

关键词： behavioral fragmentation waterfowl habitat landscape ecological design.

Expression of prostaglandin E_2 receptors in rat hippocampus

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Neural Regeneration research 2006年第7期1卷 668-669页

作者： Fang Liu1,2, Weidong Xu1, Xijiu Fu1, Jie Li1, Yanrong Song1, Xiaolin Li1, Xiaoxin He1, Dong Han1, Qiuxia Li1, Yuhua Chen3 1Department of Neurology, Fengtian Hospital, shenyang Medical College, shenyang 110024, Liaoning Province, china 2University of South Carolina, USA 3Department of Development, china Medical University, shenyang 110024, Liaoning Province, china Department of Neurology Fengtian Hospital Shenyang Medical College Shenyang 110024 Liaoning Province China University of South Carolina Columbia SC United States Department of Development China Medical University Shenyang 110024 Liaoning Province China

BACKGROUND: Prostaglandin E2 (PGE2) can directly regulate toxic injury of hippocampal neurons through participation by its receptor. Increase of excitability of hippocampal membrane and long-term synaptic elasticity are closely related to PGE2, PGD2 and PGF2A. This suggests that PGE2 may be a key molecule of neuronal signal passage and regulate the existence of neurons through its receptor. However, which isoforms of PGE2 receptor expressing in hippocampal neurons is still unclear. OBJECTIVE: To research the subtype expression of PGE2 receptor in hippocampus of rats through mRNA transcription and protein interpretation. design: Animal studies with random, control and operator and designer double-blind methods. SETTING: University of South Carolina, Animal Center. MATERIALS: Sprague-Dawley rats, aged 12 weeks, weighing 200 g, females 48 and males 48, were selected from Animal Center in South Carolina University. Tri ReagentTM kit was provided by Molecular research Center, USA. METHODS: The experiment was carried out in Animal Center in South Carolina University from January to December 2005. The expression of the PGE2 receptors was profiled and compared in rat hippocampus using real-time RT-PCR and Western-blot techniques. MAIN OUTCOME MEASURES: Expression of PGE2 receptors in various isoforms of hippocampal neurons of rats. RESULTS: mRNAs of all four EP1-4 subtypes were detected in the hippocampus. Western-blot data showed consistently detectable bands at approximately Mr 50 000 of EP1, Mr 40 000 and Mr 52 000 of EP2, Mr 45 000, Mr 57 000 and Mr 105 000 of EP3, and Mr 46 000 of EP4. CONCLUSION: Identifying four subtypes of EPs heterogeneously expresses in the hippocampus.

关键词： PCR Expression of prostaglandin E2 receptors in rat hippocampus PGE