充分条件

Our results improve the former results. For periodic Jacobi matrix, some new spectral properties of periodic Jacobi matrix are given by studying the relationship of the eigenvalues of periodic Jacobi matrix and its n—1 principal submatrix. Applying these spectral properties, we present a necessary and sufficient condition for the solvability of an inverse problem of periodic Jacobi matrices and discuss the number and the relationship of its solutions. Furthermore, we propose a new algorithm to construct its solution and compare it with the former algorithms. As this inverse problem of periodic Jacobi matrix usually has multiple solutions as many other eigenvalue inverse problems, we study the uniqueness of this problem. And a necessary and sufficient condition is given to ensure its uniqueness, under which an algorithm is presented and the stability analysis is also given. Finally, we put forward a new inverse problem for periodic Jacobi matrix which has not been solved.

对周期Jacobi矩阵特征值反问题，通过研究周期Jacobi矩阵与其n-1阶主子阵特征值的关系，给出了周期Jacobi矩阵的一些新的谱性质；利用这些谱性质，研究了一类周期Jacobi矩阵特征值反问题，用新的方法推导出了该类特征值反问题有解的充分必要条件，并讨论了解的个数以及解与解之间的关系；此外，提出了一种新的构造周期Jacobi矩阵反问题解的数值算法，并与前人的算法做了一定比较；由于周期Jacobi矩阵特征值反问题和其他很多特征值反问题一样往往存在多个解，本论文给出了周期Jacobi矩阵反问题解唯一的充要条件，并发现周期Jacobi矩阵特征值反问题的解唯一当且仅当构造的矩阵满足一定的条件；在解唯一的情况下，给出了构造唯一解的数值算法，并做了相应的稳定性分析；最后，提出了一类新的有待于解决的周期Jacobi矩阵特征值反问题。

Research on Korean adverbs of degree made before is mainly focused on category, subordinate and classification, with little notice on syntactic and semantic features of some adverbs, especially semantic difference, co-occurrence, syntactic constraints of synonyms.

前人对韩国语程度副词的研究焦点大部分集中在程度副词的范畴、下位分类、程度的等级化等方面，而对个别副词的句法、语义特性研究很不充分，尤其是研究类义词的语义差异、共现制约、句法条件等方面的研究更是微乎其微。

Economic growth may be necessary but is not a sufficient condition for the development of modern freedom.

经济增长可能是现代自由发展的一个必要而不充分的条件。

Comparatively sundried flowers are more suitable to be extracted as an industrial material although the concrete yield of fresh flowers is a little more. At the same time the experiment process fully proves the selectivity of SFE-CO2. Low temperature and low pressure are suitable to extract concrete from natural flavor and fragrance;(2) The materials prepared to extract rutin are the flowers that are gotten rid of concrete by SFE-CO2. The extraction methods include the SFE-CO2 modified by alcohol, the method of hot alkali-precipitate with acid, and alkaly dissolving and acid subsiding combined with microwave or ultrasonic.

66%；产品运用GC-MS做了鉴定；虽然鲜花浸膏产率较高，但干槐花的物料状态更适合工业生产；同时实验过程充分体现了SFE-CO2的选择性，低温低压条件适合香料的SFE-CO2；(2)以超临界CO2(Supercritical CO2，简称SC-CO2)萃取过浸膏的干槐花为原料，运用夹带剂修饰的SFE-CO2、超声或微波或直接加热的碱溶酸沉法提取中药--芸香甙，相比之下，夹带剂修饰的SFE-CO2和超声辅助的碱溶酸沉法提取效果较好，芸香甙提取率分别为2。

A genuine Calvinist ought to be a supralapsarian; in other terms, the Fall was decreed as means to an end; it did not first appear in God's sight to be the sufficient cause why, if He chose, He might select some from the "massa damnata," leaving others to their decreed doom.

一个真正的calvinist应是一个supralapsarian ，在其他条件，属於被命令作为达到目的的手段，它并不首先出现在妆饰将有充分的理由为何，如果他选择，他可能会选择一些从"马萨damnata "，留下其他人，他们颁布的灭亡。

Due to the influence factors including geological conditions, the pressure of water curtain, air pressure in surge chamber and properties of rock masses and so on are taken into account, the water-air two-phase flow model proposed in this paper may provide a new idea for the design and remediation of the air-cushioned surge chamber.

由于水-气二相流模型可以充分考虑调压室地质条件，水幕的压力，气室气压及围岩性质等因素的影响，为空气损失评估、水幕设计及对漏气严重的调压室进行修补提供了新的研究思路。

In our results, the sweetsop flowering time was during the last third of May to the early July in Beijing greenhouses. 6.9 to 6.23 was the very stage which had more flowers and high set rate. We could use this period for artificial pollination to enhance the output.

结果表明：在北方日光温室环境条件下，番荔枝自然开花集中时间为5月下旬到7月上旬，6月9~23日，是番荔枝开花数量多并且坐果率较高的时期，生产中可充分利用这一时期的人工授粉提高坐果量。

We also point out that optical fiber sensor is the optimum sensor that fits for intelligent bridge structure, and intelligent bridge structure should take priority of embedded objects.

桥梁结构健康监测系统应充分利用计算机资源，在最少人工参与的条件下，考虑系统的目的、功能、投资额度和关键部位，注重监测的实时性和长期性。

In recent years, set-valued optimization make much progress. In Chapter 5, based on Clarke tangent cone, we establish epiderivative of a class of set-valued maps and its properties. And furthermore, sufficiency optimization conditions of set-valued optimization are also obtained.

在第5章中，针对近几年发展起来的集值优化，基于Clarke切锥利用Epigraph建立了一类集值映射的Epi-导数并讨论它的一些性质，同时给出集值优化的充分的最优性条件。

The relationships between sub- and super-derivatives and Penot diferentials are dicussed as well.4. In recent years, set-valued optimization make much progress. In Chapter 5, based on Clarke tangent cone, we establish epiderivative of a class of set-valued maps and its properties.

在第5章中，针对近几年发展起来的集值优化，基于Clarke切锥利用Epigraph建立了一类集值映射的Epi-导数并讨论它的一些性质，同时给出集值优化的充分的最优性条件。

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！