充分条件

The author firstly combs the teachers sources of Shuyuan in Ming and Qing dynasties, points out that there are four main sources for it, and concludes that making full use of social resources is a valid path to solve the problem of teachers sources then.Secondly, the present research consults Shuyuan teachers employment way in Ming and Qing dynasties, combs its three ways and deeply inquires into the subjective and objective condition for them.Thirdly, the present research analyses Shuyuan teaching characteristics, management and promotion, sums up seven main teaching characteristics and analyses the advantage and disadvantage of them,Further more , the present research consults Shuyuan teachers management and promotion, makes an analysis on its historic courses why it"s informal.Finally, the present research analyses the Shuyuan teachers" economic treatment, social status and the influence and effect made to the politics, economy, military, social life and cultural education where they were situated in Ming and Qing dynasties, and concludes that the Shuyuan teachers in Ming and Qing dynasties actively participated in the local social activities in their peculiar upper class gentlemanship and greatly influenced and promoted the policy making and carrying out of the local public affairs, meanwhile, they promoted the communication and development of local learning and culture , and trained quite many men for profession for the locals.

作者首先对明清时期书院教师的来源进行了梳理，指出了明清书院教师的四种主要来源，认为充分利用社会资源是明清书院解决教师来源的有效途径；其次，对明清时期书院教师的聘用方式进行了历史考察，梳理出明清时期书院存在着三种教师聘用方式，深入探讨了这三种方式并存的主客观条件；再次，对明清时期书院教师的教学特点进行了分析，归纳出七个主要教学特点，并说明其利弊；此外，探讨了明清时期书院教师的管理及升迁问题，分析了其存在的不规范性的历史原因；最后，剖析了明清时期书院教师的经济待遇、社会地位及对书院所在地的政治、经济、军事及社会生活与文化教育所可能产生的作用与影响，得出明清书院教师以自己特有的上层绅士身份与地位积极地参与到当地社会生活之中，并在相当程度上影响与促进了地方公共事务的决策与实施；同时，他们促进了当地学术及文化的交流与发展，为当地培养出了大批的杰出人才。

About the existence of duadic codes, Ward and Zhu(1994) obtained necessary and sufficient conditions for existence of duadic abelian codes, Zhang(1997) gave the existent conditions for such codes by some parameters and obtained necessary and sufficient conditions for existence of central duadic group algebra codes.

对duadic群代数码的存在性问题，Ward和朱烈(1994)解决了域上duadic阿贝尔码存在性；张胜元(1997)年用参数形式给出更具体的判定条件和中心duadic群代数码存在的充分必要条件。

Company is located in Wuhan, Hubei Province Jianghan District Hongguang Road, No. 56 Industrial Park, treeconvenient transport and geographical location make full use of their advantage, relying on Chinese laborers of Electrical and Electronics Engineering College and postdoctorate powerful technical force and advanced research facilities, with modern a variety of advanced process equipment and complete Product certification bodies and electrical experimental conditions, products are in line with national standards and the International Electrotechnical Commission standard and Electrical and Mechanical Services Department "test transformer standards", and continuous improvement of the "Quartet Wuhan High-Test Electrical Engineering Co., Ltd. sets the standard."

公司位于湖北省武汉江汉区红光路56号姑嫂树工业园，交通便利，充分利用自身地理位置的优势，依托华工电气及电子工程学院和博士后流动站强大的技术力量和先进的科研设施，拥有现代化的各种先进工艺设备及完备的产品验证机构和电气实验条件，产品均符合国家标准和国际电工委员会标准及机电部《试验变压器标准》，并不断自我完善了《武汉四方高试电气成套工程有限公司企业标准》。

The host plant supplies the bacteria with food and a protected habitat and receives surplus ammonia in exchange.

寄主植物为细菌提供食物以及一个有充分保护的栖息处，而作为交换条件，将剩余的氨接收过来。

The analysis of hydrogen-producing nature was presented through the point of catalysis of hydrogenase, the production of energy and its transportation. From author's view, the course of de-hydrogen from pyruvic acid to acetyl-CoA was the chief determinant for hydrogen producing. And the balance and adjustment of NADH/NAD〓 was just the necessary condition, not the foundation reason.

本文从产氢反应的催化体系、能量产生和传递等不同角度对产氢本质进行了系统的理论分析，认为产氢发酵的第一判定条件（即产氢发酵的充分必要条件）是丙酮酸-乙酰CoA脱氢过程；而NADH／NAD〓的平衡调节机制只是必要条件，不是产氢发酵的根本动力。

The relationship between hydrophyte and water environment should be considered during the recovery of water ecological environment.

在恢复水域生态环境过程中，应充分考虑水生植物与环境的协同作用，根据环境条件和群落特性，合理配置水生植物群落，形成稳定可持续利用的生态系统。

There is the Cauchy problem of hyperbolic system with weak damping in Chapter4. In the space of dimension N=1,3, exploiting the semigroup method, the global existence and the decay behavior of the solution with small initial data to problem (about problem with small initial data) is put forward.

当空间维数N=1，3和初值充分小时，利用半群理论得到问题整体解的存在性，并对于整体解给出一致衰减估计；当空间维数N=1 时，利用试验函数方法讨论解在有限时刻爆破的条件。

The sufficient and necessary conditions of complete moment convergence for sequence of identically distributedρ-mixing random variables are obtained, which extent and generalize the well-known results.

获得了同分布ρ混合序列的矩完全收敛性成立的充分必要性条件，推广和改进了已有的结果。

The general requirement of labour force commodity should be distinct benefit principal part to factor of production have inadequately.

劳动力商品的一般条件应该是不同利益主体对生产要素的不充分占有。

We construct the model of the incorporative game to analyze the strategies of the generation and buyer, and conclude that the equilibrium in bilateral transaction reaches the Pareto optimality under the full competition.

其中，从非合作博弈角度出发，建立区域电力市场竞价交易中发电商与购电商的博弈模型，分析发电商与购电商的双边交易行为，说明在充分竞争条件下，双边交易中所达到的均衡一定为帕累托最优。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！