查询词典 sufficient condition

The development target, development software, function, main characteristi-cs and work flow of diagnosis system for health condition of highway tunnel areintroduced, and the development process of highway tunnel disease database isdetailed introduced. Finally, through the application of the system to a case, thevalidity of diagnosis method for health condition of highway tunnel and thepracticability of diagnosis system for health condition of highway tunnel are verified.

6介绍了公路隧道健康状态诊断系统的开发目标、开发环境、功能、主要特点和工作流程，详细介绍了公路隧道病害数据库的实现过程，最后用实例介绍了系统的应用，验证了公路隧道健康状态诊断方法的有效性和公路隧道健康状态诊断系统的实用性。

The results showed that (1) compared with conventional N treatment, the N loss of economic N treatment reduced while NUE and N residue in soil improved under water-saving condition;(2) Use efficiency of fertilizer applied as basal fertilizer was higher than that as top-dressing fertilizer under water-saving condition;(3) The fertilizer N residue rate was from 29% to 41%, and 60% of N residue, which distributed in 1m depth soil concentrated in 0～20cm surface layer;(4) In whole growing stage of wheat, fertilizer N hadn't leach to 130cm depth;(5) NUE of economic N treatment under conventional irrigation decreased by 16.6% compared with the same N treatment under water-saving condition.

结果表明，与常规施氮量处理相比，节水灌溉条件下节肥施氮量处理的氮肥损失率降低，氮肥当季利用率和土壤残留率提高；基施氮肥的利用率高于追施氮肥；土壤肥料氮的残留率在 2 9%～ 41 %之间，分布于 1m土层中，其中60 %以上集中在 0～ 2 0cm土层；在整个小麦生长季内，肥料氮并没有淋洗到 1 30m以下。节肥施氮量在常规灌溉下的当季利用率比在节水灌溉下降低 1 6 6%。

Objective: In this parper, we studied the key problems of resolution and determination,which haven,t been solved by HPLC in Cordyceps sinensis.,such as chromatography condition and extraction condition. Using the condition we studied out, we analysed the nucleosides in Cordyceps sinensis . and in its adulterations and counterfeits by HPLC. The purpose is to find the difference between Cordyceps sinensis . and its adulterations, and also to provide a effective method for quality assess of Cordyceps sinensis .

目的：本课题采用高效液相色谱法，通过对冬虫夏草中核苷类成分分离测定中的关键性问题进行考察，解决利用高效液相色谱分析冬虫夏草存在的问题，并利用该条件对冬虫夏草及其混淆品与伪品中核苷类成分进行分析研究，找出冬虫夏草与混淆品及其伪品在成分及含量上的差异，完善冬虫夏草质量评定标准。

Because of the complexity of the condition of groundwater dynamic force, aiming at the specific hydrologic geology condition, dynamic force condition, the pollutant migration instance of groundwater, establishing reasonable groundwater solute migration model, using computer languages, numerical simulating and visualizing the distributing State, is a cheap and effective method for predicting and preventing groundwater pollution.

由于地下水动力条件的复杂性，针对地下水特定的水文地质条件、水动力条件、污染物质运移情况，建立合理的地下水溶质运移模型，利用计算机语言，数值模拟并可视化地下水污染溶质的实时分布状态，是预测、防治地下水污染的廉价而又行之有效的方法。

At first,as weintroduce the concept of gauge function for stochastic to discuss the local time ofadditive Lévy process,so we get a necessary and sufficient condition for theexistence of the local time for a class of additive Levy processes.

本文主要在以下几个方面有所创新：第一，由于引入了规范函数来讨论可加Lévy过程的局部时，因而取得了比其它同类文章更好的结果：对一类可加Lévy过程得到了其局部时存在的充要条件。

Additivity of average mutual communication is proved, based on this, inequality for general correlation coefficients is derived, and the necessary and sufficient condition is obtained for equality.

证明了平均互信息的可加性，在此基础上得到了广义相关系数不等式，并给出了等式成立的充要条件。

Based on these results,a sufficient and necessary condition for systems to be admissible was derived.

近年来，很多的研究者正试图将这种方法推广到广义系统中。

Based on which, a necessary and sufficient condition for the existence of controllers is derived and the analytic expression of expected controllers is proposed.

汽约束下具有鲁棒稳定性的充要条件，在此基础上，得到了Delta算子系统状态反馈控制器存在的充要条件和解析表达式。

Compensation by Willis circle is the most sufficient type but Leptomeningeal anastomose is the most frequent. The type and prognosis of cerebral infarction are mainly affected by duty arteries as well as collateral circulation condition.

侧支循环代偿以Willis环最充分，软脑膜支吻合最常见；脑梗死的类型和预后受血管病变和侧支循环状态的综合影响。

In the last section, we obtain a sufficient and necessary condition for an antichain to be the set of all circuits of a combinatorial scheme.

在最后一节，我们得到了组合概型的一个反链是其所有圈集的充分必要条件。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。