必要性

So,the necessity and feasibility in carrying out consultancy in information system engineering are studied in this paper.

为此，对在信息系统工程中实施监理的必要性和可行性进行了分析，并对信息系统工程监理的工作内容、管理模式等进行了研究。

Hence, it has no need for pest control, which can contaminate bee products.

因此，它并没有为虫害控制的必要性，它会污染蜂产品。

Chapter one is to research on the economical necessity of the continuance of national debts policy.

第一章研究国债政策可持续性的经济必要性。

On these foundations as to point out by comparable analysis:face to such a tend of Market competition and a new economic requirement;Huaxin only practice continuant developmental entirety. Pant necessity and reasonableness. Then raise strategical scheme and thought. At the end Huaxin should take the specific policy.

接着认真分析了可持续发展的涵义；我国水泥企业实施可持续发展的宏观和微观环境；以及华新实施可持续发展的必要性、可行性，以及实施可持续发展的战略意义；然后提出华新实施可持续发展的战略构想和思路；最后重点分析了华新要实现这一构想应采取的具体对策。

In the proof,sufficient conditions are proved mainly by properties of K function and continuity of Lyapunov function:in necessary proof,we separately structure Lyapunov functions which satisfy the conditions of the theorems, such that the results establish.

在定理的证明中充分性主要利用K类函数严格单调递增和Lyapunov函数的连续性；必要性的证明中，分别构造Lyapunov函数，满足定理的条件，使得定理的结论成立。

This article introduces a new contravariant bridge circuit in the power source of the medium friquency induction furnace,analyzes the necessity of using R-C for protecting the thyris-tors.

介绍一种新型晶闸管中频感应电炉的逆变电桥，分析了对该电桥逆变晶闸管采用阻容保护电路的必要性。

Then analyzed has compared the contravariant controller control strategy, in established in the SPWM inversion linearization model foundation to analyze the necessity which double-circle controlled, and in controlled in the link to introduce the PID adjustment, enhanced the control the dynamic response ability and the system stability, enhanced the power source the load compatibility and the output stability.

接着分析比较了逆变控制器的控制策略，在建立了SPWM逆变器的线性化模型基础上分析了双环控制的必要性，并在控制环节中引入PID调节，来提高控制的动态响应能力和系统的稳定性，以提高逆变电源的负载适应性和输出的稳定性。

Conversazione is held by legislative departmentincluding related branched and representatives to have an informaldiscussion on the necessity and feasibility of the law.

座谈会是在立法过程中，由立法机关或立法机关委托起草法律、法规的有关部门，邀请有关方面的代表，就法律、法规草案的必要性、可行性听取意见，进行座谈的制度。

The necessarity of using convex set theory in dealing with uncertainty in earthquake engineering is pointed out.

阐述了在地震工程中应用凸集理论处理不确定问题的必要性。

From the view-point of international law, the paper specializes international conventions and 《The Digital Millennium Copyright Act》 of the United States, which has great influence on the field of copyright protection in

通过介绍不同国家对信息网络传播权的认定和保护，结合数字图书馆本身的特点，说明了设立这一新的权利的必要性，同时提出这一新的权利对数字图书馆资源建

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。