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Dam VSIS可视化仿真系统在混凝土坝施工中的应用(英文)

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天津大学学报 2006年第B6期39卷 398-405页

作者：练继亮钟登华天津大学建筑工程学院

仿真技术在辅助大坝设计和施工决策中发挥着重要作用,但时仿真计算模型及成果提交的有效性问题始终是研究的两个难点．为此。运用可视化技术,开发了DamVSIS大坝施工可视化仿真系统,能够进行有效的模型验证,确保仿真计算成果真实有效,同... 详细信息

仿真技术在辅助大坝设计和施工决策中发挥着重要作用,但时仿真计算模型及成果提交的有效性问题始终是研究的两个难点．为此。运用可视化技术,开发了DamVSIS大坝施工可视化仿真系统,能够进行有效的模型验证,确保仿真计算成果真实有效,同时借助可视化技术的信息表达,特别是真三维的地形环境与实体,为决策者直观、快捷地掌握多参数环境的系统信息提供支持,实戢证明其效果是显著的．

关键词：混凝土坝施工大坝可视化仿真系统仿真计算地理信息系统

Investigation of Protection Schemes for High Penetration Rooftop Photovoltaic System

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Investigation of Protection Schemes for High Penetration Roo...

A Review on Electric Vehicle Charging Infrastructure Development in the UK

2011 International Conference on Advanced Power System Automation and Protection(APAP 2011)

作者： LI Bin 1 , WU HongLin 1 , GAO XiaoQi 2 1 Key Laboratory of Smart Grid of Ministry of Education, tianjin University, tianjin 300072, china 2 Longyuan (Beijing) Solar Engineering Technology Co., ltd., Beijing 100034, china

As a clean and renewable source of energy and can be used easily and widely in the future, photovoltaic is one of the most important distributed generations in micro-grid. The deployment of high penetration rooftop photovoltaic （PV） system is becoming a reality in micro-grid. Developing high penetration rooftop PV system in an effective manner is a great challenge. The paper analyzes the characteristics of high penetration rooftop PV system and proposes protection schemes according to the requirements. As the operation of micro-grid is flexible, micro-grid could operate not only in radial or open loop configurations, but also in closed loop configurations according to the security and the reliability requirements. This paper investigates the protection requirements of high penetration rooftop PV system and analyzes the characteristics of conventional protection schemes applied to high penetration rooftop PV system. Obviously, the pilot protection can fulfill the requirements of high penetration rooftop PV system. Taking the fault clearance speeds and the requirement of directional element into account, the paper proposes protection scheme based on overcurrent coordination for high penetration rooftop PV system. The proposed protection schemes show that it can clear the fault instantaneously and significantly improve the reliability and security of high penetration PV system.

关键词： protection scheme high penetration rooftop photovoltaic system micro-grid wireless communication

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Journal of Modern Power Systems and Clean Energy 2020年第2期8卷 193-205页

作者： tianjin Chen Xiao-Ping Zhang Jianji Wang Jianing Li Cong Wu Mingzhu Hu Huiping Bian XU JI Power Co. Ltd.XuchangChina Department of Electronic Electrical and Systems EngineeringUniversity of BirminghamBirminghamUK State Grid Shandong Electric Power company LinyiChina

This paper focuses on the development of electric vehicle(EV)charging infrastructure in the UK,which is a vital part of the delivering ultra-low-emission vehicle(ULEV)and will transition into low emission energy systems in the near *** a brief introduction to global landscape of EV and its infrastructure,this paper presents the EV development in the *** then unveils the government policy in recent years,charging equipment protocols or standards,and existing EV charging *** topologies of charging infrastructure are ***,three important factors to be considered in a typical site,i.e.,design,location and cost,are discussed in ***,the management and operation of charging infrastructure including different types of business models are *** but not least,challenges and future trends are discussed.

关键词： Electric vehicle(EV) charging point charging infrastructure smart charging

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水平井变刚度下部钻具组合的弹性稳定性

石油机械 1998年第2期26卷 13-18页

作者：姜伟中国海洋石油总公司渤海石油公司天津市塘沽区300456

针对目前水平井及大斜度井中常采用变刚度钻具组合的特点，从现场实际情况出发，应用弹性变形能量法，建立了变刚度管柱的三角级数挠曲变形方程。同时，还根据水平井及大斜度井旋转钻进和滑动钻进的特点，考虑了与实际操作有关的钻头扭... 详细信息

针对目前水平井及大斜度井中常采用变刚度钻具组合的特点，从现场实际情况出发，应用弹性变形能量法，建立了变刚度管柱的三角级数挠曲变形方程。同时，还根据水平井及大斜度井旋转钻进和滑动钻进的特点，考虑了与实际操作有关的钻头扭矩、钻压、转速、钻柱的几何尺寸、自重以及井斜角等主要参数的影响，研究了变刚度钻具组合的弹性稳定性问题及临界钻压的计算方法。最后进行了两口井的现场应用实例计算及分析。

关键词：水平井钻具组合稳定性钻井技术

In vitro release of 1,3-bis(2-chloroethyl)-1-nitrosourea sustained-release microspheres and the distribution in rat brain tissues

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Neural Regeneration Research 2006年第9期1卷 793-796页

作者： Xia Li1, Liping Guo2, Qin Li3 1Central Pharmacy, General Hospital of Chinese People’s Armed Police Forces, Beijing 100039, china 2Department of Pharmaceutics, Zhengzhou Central Hospital, Zhengzhou 450007, Henan Province, china 3Teda International Cardiovascular Hospital, tianjin 300457, china Central Pharmacy General Hospital of Chinese People's Armed Police Forces Beijing 100039 China Department of Pharmaceutics Zhengzhou Central Hospital Zhengzhou 450007 Henan Province China Teda International Cardiovascular Hospital Tianjin 300457 China

BACKGROUND: The implantation of released chemotherapeutic drugs, which takes biodegradable polymer as vector, into the tumor site can get high concentration and release the drug for a long time, it can directly act on the tumor cells, and reduce the general toxicity. OBJECTIVE: To explore the in vitro and in vivo course of 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) sustained-release from BCNU-loaded polylactide (PLA) microspheres (MS) and location in rat brain tissue. DESIGN: A repetitive measurement. SETTING:Central Pharmacy, General Hospital of Chinese People’s Armed Police Forces. MATERIALS: Thirty male SD rats were used. PLA (Mr5000, batch number: KSL8377) was produced by Wako Pure Chemical Inc.,ltd. (Japan); BCNU (batch number: 021121) by tianjin Jinyao Amino Acid Co., ltd.; BCNU-PLA-MS was prepared by the method of solvent evaporation and pressed into tablets (10 mg/tablet). High-performance liquid chromatography (HPLC) Agilent 1100 (USA); LS9800 liquid-scintillation radiometric apparatus (Beckman). Chromatographic conditions: Elite Hypersil ODS2 C18 chromatographic column (5 μm, 4.6 mm×150 mm); Mobile phase: methanol: water (50:50), flow rate was 1.0 mL per minute, wave length of ultraviolet detection was 237 nm, and the inlet amount of samples was 10 μL. METHODS: The experiments were carried out in the experimental animal center of the General Hospital of Chinese Armed Police from May 2004 to July 2005. ① In vitro BCNU-PLA-MS release test: BCNU-PLA-MS was prepared by the method of solvent evaporation, then placed in 0.1 mol/L phosphate buffered solution (PBS, pH 7.4, 37 ℃), part of MS were taken out at 1, 2, 3, 7, 10 and 15 days respectively, and the rest amount of BCNU in MS was determined by HPLC, then the curve of BCNU-PLA-MS release was drawn. ②In vivo BCNU-PLA-MS release and distribution test: The rats were anesthetized, then BCNU-PLA-MS were implanted to the site 1 mm inferior to the cortex of frontal lobe. Five rats were killed postoperatively at 4 h

关键词： BCNU MS PLA nitrosourea sustained-release microspheres and the distribution in rat brain tissues chloroethyl

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重力式码头胸墙裂缝质量通病的防治

水运工程 2007年第S1期 33-37,40页

作者：昌红霞柳光中交一航局第一工程有限公司天津300456

结合部分重力式码头施工经验,从机理上对码头胸墙裂缝的形状、成因和工程危害进行分析,提出针对性的防治措施,并在鲅鱼圈港区四期工程54#～56#集装箱泊位胸墙的施工中得到应用,收到了较好效果。

关键词：重力式码头胸墙混凝土裂缝防治措施

Preparation of acellular nerve grafts with triton X-100

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Neural Regeneration Research 2006年第7期1卷 645-648页

作者： Jinbao Han1, Juwen Chen2, Baohui Zhao1, Jichun Zhang1, Dehu Tian1, Jiuhui Han1 1Department of Hand Surgery, the Third Affiliated Hospital, Hebei Medical University, Shijiazhuang 050051, Hebei Province, china 2Second Department of Orthopaedics, the Fourth Center Hospital of tianjin, tianjin 300140, china Department of Hand Surgery Hebei Medical University Shijiazhuang 050051 Hebei Province China Second Department of Orthopaedics The Fourth Center Hospital of Tianjin Tianjin 300140 China

BACKGROUND: The source of nerve allograft enriches. We may choose expediently nerve allograft to repair injured nerve and the structure of choice nerve homology or similar with the injured nerve, but the immunological rejection limits the clinical application of nerve allograft. The ideal substitute of autograft never is researching. OBJECTIVE: In this experiment, Triton X-100 was used to extract the Schwann cells and myelin sheaths of allograft nerve and obtain the inartificial and eliminated antigenicity nerve-transplanter (nerve grafts). DESIGN: Controlled experiment. SETTING: Department of Hand Surgery, the Third Affiliated Hospital of Hebei Medical University; Second Department of Orthopedics, Fourth Center Hospital of tianjin. MATERIALS: Thirty health New Zealand big ear white rabbit, of either sex (gender), weighing 2000-3000 g, were provided by the Center of Experimental Animal of Hebei Medical University. TritonX-100 was offered by SIGMA company. METHODS: The experiment was carried out at the Central Laboratory of the Third Affiliated Hospital of Hebei Medical University from December 2003 to December 2004. Sixty pieces of sciatic nerves, 10-mm-long nerve segment, which were taken from 30 rabbits, were incised. They were randomly divided into chemical extraction group (n =50) and control group (n =10). In the chemical extraction groups, the nerves were put into 3% Triton X-100 solution. They were treated with Triton X-100 for 12 hours, 24 hours, 48 hours, 96 hours and 1 week, respectively. They were examined in every period. The control groups did not treated with anything. ① Respectively two segments of nerve by 2 mm length were taken from each nerve in the every periods. ② The laminin immunohistochemical stained sections were performed with image acquisition and analyzed with multicolor pathological image analysis system. Measured the laminin antibody reaction part of each section and computed laminin average gray degrees of the unit area. All dates were

关键词： cell Preparation of acellular nerve grafts with triton X-100 ECM Figure

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天津泰达图书馆基坑工程实测与分析

施工技术 2003年第8期32卷 37-38,35页

作者：齐亮郑刚杜有亮李建军天津大学天津300072 天津一建建筑工程有限公司天津300070

对某基坑支护工程进行全面的变形和内力监测 ,分析了结构在施工过程中变形、内力实测数据。

关键词：天津泰达图书馆支护内力监测变形基坑工程

Research on Document Management System Based on Streaming Storage Technology

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Research on Document Management System Based on Streaming St...