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重力坝设计新思路 被引量:8
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作者 孙君森 林鸿镁 《水利学报》 EI CSCD 北大核心 2004年第2期62-67,共6页
碾压混凝土(RCC)筑坝技术是混凝土筑坝技术在材料与施工技术上的革命,本文从RCC坝的现状入手,分析大坝产生裂缝和导致渗漏的原因,论证了尽可能降低重力坝坝体混凝土中的胶凝材料用量,就可避免温度裂缝的发生。提出的重力坝设计新思路是... 碾压混凝土(RCC)筑坝技术是混凝土筑坝技术在材料与施工技术上的革命,本文从RCC坝的现状入手,分析大坝产生裂缝和导致渗漏的原因,论证了尽可能降低重力坝坝体混凝土中的胶凝材料用量,就可避免温度裂缝的发生。提出的重力坝设计新思路是:坝体混凝土只满足应力与稳定的要求,无需承担防渗功能,而大坝的防渗功能,应由上游面专门设置的防渗结构来承担,即大坝的设计应体现功能分开的原则。 展开更多
关键词 碾压混凝土坝 温度裂缝 防渗结构 功能分开 设计新思路
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Function Zoning of the Major Function Development-optimized County:A Case in Shangyu,Zhejiang
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作者 Wang Chuansheng Zhu Shanshan Fan Jie 《Chinese Journal of Population,Resources and Environment》 2012年第4期101-106,共6页
The 11th Five Year Plan has divided national functional zones in the basic unit of county-level administrative region.After implementation of national Major Function-oriented Zones (MFOZ) at prefecture and county leve... The 11th Five Year Plan has divided national functional zones in the basic unit of county-level administrative region.After implementation of national Major Function-oriented Zones (MFOZ) at prefecture and county levels,the spatial development sequence must be specified,development intensity must be limited,oriented zones must be designated and "red line" areas of spatial governance must be defined.In view of the above,choosing a typical county area and exploring its functional zoning after orienting its major functions will supply reference for carrying out the national spatial planning in the 12th Five Year Period,and it will also provide experience for the study of function regionalization which is the theme of MFOZ in the present academic circles.In this paper,the authors take Shangyu County as an example to study the general principles,train of thought of county-level functional regionalization in development-optimized areas,and to explore its reasonable functional zoning plan.Consequently,the authors present five principles and suggest a function-oriented zoning plan with 2 levels and 4 types. 展开更多
关键词 Shangyu major function-Oriented zone development- optimized county level
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酷“鼠”难挡——CursorXP
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作者 王光临 《电脑技术——Hello-IT》 2004年第3期31-31,共1页
关键词 CursorXP 鼠标指针 下载 分开功能 缩放功能
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The Effects of Electroacupuncture at the Heart Meridian on Myocardial Contractile Function in Rabbits with Myocardial Ischemia
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作者 Fang Zhibin(方志斌) +3 位作者 Zhou Yiping(周逸平) Wang Yuelan(王月兰) 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2002年第1期47-50,共4页
  Acute myocardial ischemia was induced by intravenous injection of pituitrin, and electroacupuncture (EA) was applied at the Heart and Lung Meridians (HM and LM), 3 points on each meridian. The changes in the left ...   Acute myocardial ischemia was induced by intravenous injection of pituitrin, and electroacupuncture (EA) was applied at the Heart and Lung Meridians (HM and LM), 3 points on each meridian. The changes in the left intraventricular pressure (LVP), the maximum rise rate of intraventricular pressure (LVP dp/dtmax), the area of cardiac force loop (ACFL), and the maximum shortening velocity of myocardial contractile element (Vmax) were observed. As a result, there were significant differences in the improvement of LVP, LVP dp/dtmax, ACFL and Vmax between EA at HM and LM. The regulatory action of EA at HM on the myocardial contractile function was significantly better than that of EA at LM, indicating that HM has a close relationship with the myocardial contractile function.…… 展开更多
关键词 ELECTROACUPUNCTURE ANIMALS Female Male MERIDIANS Myocardial Contraction Myocardial Ischemia Pituitary Hormones Posterior RABBITS Random Allocation Ventricular Function Left
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The Development of Intelligent Home Remote Monitoring System based on B/S Framework
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作者 Duoyou LI Zhensheng WANG 《International Journal of Technology Management》 2015年第2期63-65,共3页
This paper deeply studies the intelligent Home embedded system based on B/S architecture. Firstly, analysis requirement of Home function based on the existing software development mode, and proposed a system framework... This paper deeply studies the intelligent Home embedded system based on B/S architecture. Firstly, analysis requirement of Home function based on the existing software development mode, and proposed a system framework of intelligent Home system, and designed the communication scheme of the whole Home system, also gives the system each function module realization. This paper achieve two basic service system based on Intelligent Home through a series of analysis and design: outdoor remote intelligent Home monitoring service and the indoor intelligent management service. 展开更多
关键词 Smart home system B/S structure CGI program Embedded server
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Full-temperature covered switching material with triple optic-dielectric states in a lead-free hybrid perovskite 被引量:3
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作者 Tie Zhang Lulu Chu +5 位作者 Zhixu Zhang Jie Li Wanying Zhang Pingping Shi Qiong Ye Da-Wei Fu 《Science China Materials》 SCIE EI CSCD 2020年第11期2281-2288,共8页
Optic-electric responsive materials have attracted much attention for their applications in temperaturesensing,actuators,and memory switches.However,it is a challenge to integrate various functions to form multifuncti... Optic-electric responsive materials have attracted much attention for their applications in temperaturesensing,actuators,and memory switches.However,it is a challenge to integrate various functions to form multifunctional responsive materials.As molecule-based hybrid materials usually consist of organic and inorganic components,the introduction of multiple functions can be achieved through structural construction.Thus far,even though fulltemperature cover is required for device applications,fulltemperature covered multi-switchable hybrid materials have rarely been successfully synthesized.Herein,the dynamic[(CH3)3NOH]+cation and luminous center Mn(II)were introduced to form a hybrid material[(CH3)3NOH][Mn Cl3],showing multiple temperature-responsive behaviors.Upon temperature change,it exhibits multi-state dielectric switching response and intensity or peak shift response of luminous in full-temperature range(low,room,and high temperatures).These responsive behaviors are triggered by the motion or reorientation of[(CH3)3NOH]+cations and inorganic framework.Overall,the switchable photoelectric material has potential applications in multiple encrypted storage and sensor devices. 展开更多
关键词 responsive material multiple dielectric states crystal PEROVSKITE
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Thermal Magnifier and Minifier
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作者 沈翔瀛 陈祎璇 黄吉平 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第3期375-380,共6页
For thermal conduction cases,one can detect the size of an object explicitly by measuring the temperature distribution around it.If the temperature is the only signature we can obtain,we will give an incorrect judgmen... For thermal conduction cases,one can detect the size of an object explicitly by measuring the temperature distribution around it.If the temperature is the only signature we can obtain,we will give an incorrect judgment on the shape or size of the object by disturbing the distribution of it.According to this principle,in this article,we develop a transformation method and design a dual-functional thermal device,which can create a thermal illusion that the object inside it "seems" to appear bigger or smaller than its original size.This device can functionally switch among magnifier and miniGer at will The proposed device consists of two layers:the cloak and the complementary material.A thermal cloak can make the internal region thermally "invisible" while the complementary layer offsets this effect.The combination leads to the illusion of magnification and minification.As a result of finite element simulations,the performances of the illusions are confirmed. 展开更多
关键词 transformation thermotics thermal metamaterial thermal illusion complemenetuary laser
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