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IsIs so lves the currently existed practical bondage and reduces the time spent in making circuit board and waste of bank roll and time resulted from the inaccuracy design, playing an important role in improving product development efficiency and decrease of development cost.

它解决了一些实际存在的束缚，节省了大量的制作电路板的时间并减少了因设计错误导致的资金、时间的浪费，对提高产品的开发效率，降低开发成本等有重要作用。

In new situation, the study of the problem is of profound theoretical and practical significance.The paper analysis the theory , starts with land banking, draw urban land banking, get to the principle and the operation system.

因此，这一研究对新形势下上海城市土地储备运作机制的完善与发展具有实际指导意义，并对城市土地开发和利用的实践具有较好的参考价值。

A simple and practical bar code recognition software, has a very high reference value.

详细说明：一款简单实用的条形码识别软件，有很高的参考价值。

To give the definition of the mass concrete and to concrete\'s cracks together with practical meanings of control ,and give a brief review on the research in the field at home and abroad, at last, methods to control temperature crack of the mass concrete from several aspects such as design measures,concrets material, construction schedules.etc are summed up; To explain the physical mechanics of the concrete and computing methods-Difference Method and Finite Element Method, and illustrate the application of their specific methods repectively;Several temperature factors that can influence the temperature stress of mass concrete baseplate are analyzed. The influence degree of temperature factor can be got through the ANSYS simulation computation the control of temperature can control the temperature stress, consequently control the temperature crack of mass concert baseplate; through the influence of the crack resistance ability of mass concrete baseplate which takes the reinforcement as a part is analyzed. By ANSYS simulation, the best suited volume ratio of reinforcement is found out, at same time the layout of reinforcement with the same volume ratio can also affect the resistance ability of mass concrete baseplate. Sum up of above analysis, anti-crack function of steel bar in early mass concrete baseplate is obvious, so it\'s necessary to consider beneficial effect of construction steel bar in research of temperature control on mass concrete baseplate.

本文先容了大体积混凝土及混凝土裂缝的基本概念，对国内外在这个领域里的研究现状作了扼要叙述，并从结构设计、混凝土材质、施工措施等方面总结了大体积混凝土温度裂缝控制的方法及防止措施；阐述了混凝土的基本物理力学性能，总结了大体积混凝土温度计算的方法——差分法和有限元法，并分别举例说明其具体应用的方法；分析了影响大体积混凝土底板温度应力的几种温度因素，利用ANSYS模拟计算，得出了每种因素的影响程度，通过分析提出了在这几种温度影响因素下如何通过控制温度以达到控制温度应力从而来控制裂缝的具体建议；针对大体积混凝土基础底板中配筋的不同对混凝土底板抗裂能力的影响不同，利用ANSYS进行模拟分析，得出底板中最合适的体积配筋率，同时分析了在相同体积配筋率下钢筋的具体布置对大体积混凝土基础底板抗裂能力的影响，分析表明，配置钢筋对混凝土结构的开裂阻止作用明显，在研究大体积混凝土温度裂缝题目时，要考虑钢筋在其中的有利作用。

This paper describes a simple practical Excel 2003 drawing method for electronic circuit diagram,including how to build circuit diagram tool bar ,how to establish document icon,custom-made elements tools,and how to finish circuit diagram drawing,which has in certain extent solved the problem of electronic circuit diagram drawing in the text input process,and thus raised the.

文中从如何创电子线路图工具栏、设置元件图标、定制元件工具、绘制电子线路图等方面，为读者介绍了一种简单实用的Excel 2003绘电子线路的方法，基本解决了非专业人员绘制电子线路图的难题，从而提高了工作效率。

The paper is based on the practical application of certain armed helicopter's barbette tracking system, which has discussed the model of AC servo system, the testing and modeling of certain micro-machined velocity gyro. The article also studied the tracking quality in which the system has used the motor encoder and the velocity gyro as the velocity loop feedback respectively.

以某武装直升机炮塔随动系统实际应用为背景，讨论了交流伺服系统的数学模型、微机械速率陀螺的测试与建模；研究了分别以电机编码器和速率陀螺输出信号作为速度环反馈时，系统输出的跟踪特性。

Many practical problems of trade and coordination of bargaining theory by ...

而许多现实的交易和协调问题也可通过讨价还价理论来。。。

All of the results obtained provided practical and theoretical basis for further synthetic applications of barium in metallurgical industry.

文中还对钡对夹杂物变性及微合金化作用进行了研究，所获结果为在冶金工业中综合应用钡合金提供了实践及理论依据。

Generally,to solve the practical problem of bark beetle quarantine in imported timber and wooden packing material,we carried out the research of semiochemicals-trap application,morphological and molecular identification of bark beetle in this project,and the results would contribute to improving the whole level of bark beetle quarantine.

本研究从解决进境木材及木质包装材料携带小蠹虫检疫的实际问题出发，进行了信息化合物引诱技术在小蠹虫检疫中的应用，以及检疫性小蠹科昆虫形态与分子鉴定等一系列研究，为小蠹虫整体检疫水平的提高奠定了理论与实践基础。

This article deals with the development of the marine insurance laws and the theoretical and practical problems associated with marine insuran ce, such as the risks (perils of the sea, jettison and barratry), additional risks (theft, pilferage and non-delivery, T. P. N. D., rain fresh water damager, risk of shortage, risk of odour), special additional risks (war risk, strikes, riots and civil commotions risks, S. R. C. C.) and excluded perils, as well as losses and charges insured, i. e. total los...

本文主要论述海上保险法的发展及其有关的理论和实际问题，如承保的风险(海难、投弃和船长与船员的不法行为)、附加险(偷盗、提货不着、淡水雨淋、缺量、串味)、特别附加险(战争险、罢工、骚乱和民变险)和除外风险，及承保的损失与费用，即全部损失和部分损失，以及委付与代位权等，使读者对保险法可以得到概括的理解，有助于他们更好地从事国际商事活动和法律活动。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。