借助于...

First,the determinant is regarded as a function of or- der n and denoted by D;Second,the determinant is expanded by row or by column,then the relation in both of Dand subdeterminants will be examined in details to set up certain a recursion,generally speaking,it must be a homogenous or a non homogenous recursion;fi- nally the coefficients of the general solution are found out with the aid.

给出了用递归关系方法求任意 n 阶行列式的值的一般方法：首先，把已知的 n 阶行列式看作为阶数 n 的一个函数，记为 D；其次，按行或按列展开这个行列式，并仔细观察存在于余子式及 D里的关系，建立关于 D的某一递归关系，此关系总为一个齐次的或非齐次的递归关系；最后，借助于 D(0)、D(1)和D(2)等求出递归关系的通解的系数。

By means of names, designations, and deictic expressions, we refer to individual objects, whereas sentences in which such singular terms occupy the subject position usually express a proposition or report a state of affairs.

借助于名字，称号和指示性表达，我们指称摸个对象，这些东西在句子当中的占据了主要的位置，他们经常表达一种主题或者一种事态。

With the technique of simulation, experiments can be done difficultly in real system.

摘 要：借助于仿真技术可进行真实系统难以进行的各种实验。

Some new conceptions are presented about the dissipativity theory of Ito stochastic differential systems as follows:dissipativity in module,equi-dissipativity in module and uniform dissipativity in module.

提出了有关Ito型随机微分系统耗散性理论的新概念：按模耗散、按模等度耗散和按模一致耗散，并利用Lyapunov方法，借助于Ito微分公式沿着Ito型随机微分系统的解对所构造的Lyapunov函数求导数，给出了Ito型随机微分系统有关按模耗散理论的一些代数判据，获得了与确定性常微分系统耗散性理论相对应的结论，最后的算例证明了该方法的有效性和可行性。

Doctrinalism advocates discovering, understanding and creating constitutional meanings according to constitutional principles and spirit by studying the doctrines reflected in constitution.

学说解释方法强调通过体现在宪法文本中的宪法学说，来发现、理解和创造符合于宪法学说原则、精神的宪法含义；历史解释方法则认为在解释宪法时，应当把宪法的基本原则、精神和价值体系，与社会的发展变化情况有机结合起来；而先例解释方法常适用于单独的文本分析不能充分理解宪法条文时，借助于宪法解释机关过去做出的解释案例，以解释先例为基础来探究答案。

The controllers has considered all sorts of imperceptible factors affecting the servo performances in a LPMSM servo system, which include the parametric uncertainties brought by the changes of the mobile mass, the dynamitic performance of the system and the size of input.

针对非线性控制器设计参数较多这个问题，本文将参数设计问题转化为一种优化设计问题，借助于寻优方法中最为有效的遗传算法，可以比较方便的找出符合设计要求的一组调节参数，来解决模型摄动和参数不确定性给系统带来的扰动，以保证系统的稳定性及鲁棒性。

Due to PDLC electrooptical properties, this grating can cause scattering or diffraction of an incident light dependent upon the applied voltage.

借助于聚合物分散液晶膜的电光特性，这种栅对入射光的散射或衍射取决于对其施加的电压，即它是电场可调的。

Traditionally it is through the exogenic power by the mould to realize curving formed craft. Because the cycle of mould design and manufacture is long, and the processing charge is high, so it is comparatively suitable for the mass production.

传统的弯曲成形工艺是在外力作用下借助于模具来实现的，由于模具的设计、制造周期长，加工费用高，较适用于大批量生产。

This thesis deeply researches the J2EE security strategy on the application tier of enterprise system. The security strategy predigests the information security model and meets the security requirements expediently. But there are some disadvantages when the security requirements become more complex. The expositive security on the Web-Tier can not offer more information for authentication; there is no authentication for EJB-Tier to use, make the EJB-Tier depend on the Web-Tier; J2EE uses database or application server to manage the role information. Use database to manage the role information will increase the complex of enterprise application, and the way of application server will reduce the ability of migrate other J2EE platform. To solve these problems, the thesis designs an improved security strategy model.

本文从企业级系统应用层安全的角度出发，深入研究J2EE多层体系结构的安全策略模型。J2EE提供的安全策略简化了系统的信息安全模型，能够很方便地满足基于J2EE的分布式应用系统的安全需求，但是在面对更加复杂的安全需求时，J2EE安全策略在验证授权和角色管理中还存在不足之处：其在Web层的声明式验证机制无法为用户提供更多验证信息，可扩展性较差；在EJB层缺少业务逻辑层可供采用的验证机制，而是借助于Web层的验证机制，其耦合程度较高有悖于业务逻辑分离于表现逻辑的原则；在角色管理方面，J2EE采用数据库或者应用服务器来管理角色信息，其中，数据库管理角色的方式增加了应用开发的复杂度，应用服务器管理角色降低了系统的可移植性，两者都具有片面性。

It has the and of shape world, showing as voice, image, data and information, existing in the form of sound, light, electric, magnetism forms of particle. It is vivid, formative, audio visional; it is actual, reliable and objective. Wielding modern science and technological means recording suits; independent from subject; it can reappear the process of criminal, having more accuracy and forgeable.

它是借助于有形物质而存在的无形物质，表现为声音、图象、数据、信息等的视听资料是以声、光、电、磁以及其他粒子形式存在的；视听资料生动、形象、直观，它望之有形、闻之有声、查之有据；视听资料准确、可靠、客观，它是运用现代科技手段记录案件的观客事实，不受主观意识制约；视听资料可以原声原貌地再现犯罪过程；视听资料还具有信息量大、科技含量大、精密度高、易于作假等特征。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。