查询词典 difficult problem

In use process, two layer adhesive bonding material can overlap put, not only effectively resolve the traditional process cannot solve fold fabric off-line edge fabrics, avoid the problem with complicated side whipstitch or edge to solve the problem of annoyance, but also can solve such a big and heavy seam, avoid the problem of fabrics, enhanced comfort.

在使用粘合工艺时，两层面料可以重叠摆放粘合，不仅有效地解决了传统工艺中面料叠放却无法解决面料边缘脱线的问题，避免了以烦琐的锁边或包边来解决问题的烦恼，而且还可以解决缝份过大、沉重等问题，避免了面料上下的不和谐，增强了贴体服装的舒适度。

Most often we can not 'fix' an individual Member's tech problem because unless it effects many Members and unless there are a couple of good data points to find out the source of the problem, it is currently too expensive for AGLOCO to try to have a tech person work on a single problem at this point.

最常见的，我们不能'解决'个人会员的技术问题，因为除非它的影响，不少议员和除非有一对夫妇的良好的数据点，以找出问题的根源，这是目前太昂贵agloco尝试有一个科技人的工作，对一个单一的问题，在这一点上。

Traveling Salesman Problem is a classic NP problem, which is the main standard of measuring the efficiency of approximative algorithms. So the solution of the problem has has very important significance.

Traveling Salesman Problem问题是一个典型NP难题，是衡量近似算法效率的主要标准，因此设计TSP问题的近似算法具有非常重要的意义。

Firstly,the scenery characteristic of the riverside region is summarized,history retrospect,and the nature of this research field objectively and historically grasped. Secondly,an extensive analysis on the three major problems of the status of riverside environment,including the bioecological problem,the social problem and the economical,also sustainable developmental problem,is performed. Finally,the solution to these problems is derived from analysis,which consists of five major aspects,i.e. civil planning strategy,architectural scenery strategy,greenbelt scenery strategy,riverbank scenery strategy and roadway scenery strategy.

首先通过对滨江地带景观特色的总结、历史沿革的回顾，获得对研究领域的较客观的、历史的把握；其次重点分析当前滨江地带环境景观的现状问题，这些问题主要分为生态环境问题、社会问题与经济发展问题三个主要方面；最后以分析的结果总结出解决以上问题的景观设计策略，这些策略主要分为规划设计策略、建筑景观策略、绿地景观策略、河堤景观策略与道路景观策略五个主要方面。

Firstly, the scenery characteristic of the riverside region is summarized, history retrospect, and the nature of this research field objectively and historically grasped. Secondly, an extensive analysis on the three major problems of the status of riverside nightscape, including the bioecological problem, the social problem and the economical, also sustainable developmental problem, is performed. Finally, the solution to these problems is derived from analysis, which consists of six major aspects, i.e. civil planning strategy, architectural nightscape strategy, nightscape strategy on the square, nightscape strategy of the business street, roadway nightscape strategy and greenbelt scenery strategy.

首先通过对滨江地带景观特色的总结、历史沿革的回顾，获得对研究领域的较客观的、历史的把握；其次重点分析当前的滨江地带也就是汉口江滩地带夜景观的现状问题，这些问题主要分为生态环境问题、社会问题与经济发展问题三个主要方面；最后以分析的结果总结出解决以上问题的夜景观设计策略，这些策略主要分为滨江地带夜景观的规划设计策略、建筑物的夜景观策略、广场的夜景观策略、商业街的夜景观策略、道路和桥梁的夜景观策略与绿地的夜景观策略六个主要方面。

This thesis focuses on studying the matrix equa-tion problem systematically, and proposed an abstract algorithm of solving the matrixequation with constraints, and established a strict convergence theory. Using this algo-rithm, we can solve the sets of matrix equation satisfying some constraint conditions,such as symmetric, antisymmetric, centrosymmetric, centroskew symmetric, re?exive,antire?exive, bisymmetric, symmetric and antipersymmetric, symmetric orthogonalsymmetric, symmetric orthogonal antisymmetric, Hermite generalized Hamilton ma-trix;So we can solve the problem with this algorithm, if the set of constrain matrixcan make a subspace in matrix space, and this algorithm also can solve the optimalapproximation and least squares problem. So this abstract algorithm has universal andimportant practical value.

本篇硕士论文系统地研究了此类问题，并找到了求解约束矩阵问题的抽象算法，并建立严格的收敛性理论，利用这一算法可求解约束条件为对称矩阵、反对称矩阵、中心对称矩阵、中心反对称矩阵、自反矩阵、反自反矩阵，对称正交对称矩阵、对称正交反对称矩阵、双中心矩阵、Hermite广义Hamilton矩阵等；可以说只要约束矩阵集合在矩阵空间中构成子空间，都可以考虑用此算法求解，而且这一算法还能把矩阵方程解及其最佳逼近，最小二乘解及其最佳逼近统一处理，因此本文算法有普适性和重要的实用价值。

In chapter Ⅰ, a historial review of structure control is given; In chapter Ⅱ, A discussion of the controllability and observablity of flexible structures is given, Two kinds of controllability and observablity index are defined, and applied to actuator allocation; chapter Ⅲ considers the reduction of high order flexible structure mode; the content of chapter Ⅳ is about the basic problem of distributed parameter control system design. It is proved that a stable controllor in mode space may be unstable in real use in distributed paramater systems, also, by closed loop mode concept, a pole assignment method of flexible structure controllor design is given; chapter Ⅴ is about the low-authority controllor design, it is pointed out by use of high order eigenvalue/eigenvector perturbation, a better controllor can be designed; chapter Ⅳ considers flexible structure reduced order control; chapter Ⅶ disscusses the basic problem of flexible structure computer control, analyses discreate controllablity and observablity and its computing, the sample period and coefficient wordlength; chapter Ⅷ is on the problem of low flexibility compensation; chapter Ⅸ is a design example.

在第一章简要回顾了挠性结构控制的历史，并且指出控制中的一些问题；第二章讨论了挠性结构的能控性与能观性，定义了两类能控性程度和能观性程度指标，还将能控性程度概念应用于执行器位置的确定；第三章论述了高阶模型的降价问题，比较了适于挠性结构模型降阶的方法，指出其适用范围；第四章内容是分布参数系统设计的基本问题，首先证明在模态空间中设计的稳定的控制器在实际分布系统上可能是不稳定的，进而根据闭环模态的概念，获得挠性结构控制器设计的极点配置方法；第五章的内容是关于低权控制器的设计问题，指出利用特征值高价摄动和特征向量的摄动，可以设计出更加完善的低权控制器；第六章讨论挠性结构降阶控制问题；第七章讨论挠性结构计算机控制的基本问题，分析了时间离散化模型的能控性和能观性及其计算问题，讨论了采样周期选择和系数字长问题；第八章讨论低挠性结构的补偿问题；第九章的设计例子用来说明第二章和第四章的结果。

Ione problem.., another problem…,the most serious problem

A，B， A，B， A，B，结构（如内容较多，可逐点分析。

How to ensure this new structure to be in elastic state under frequent earthqu ake, be mendable under design earthquake and not collapse under infrequent earthquake, especially the last item, is the problem to be solved imminently in engineering field. Center around this problem, 5 aspects of investigation are carried out as following:(1) The experiment of seismic performance of ASCCs in this new frame structure has not been reported, in order to study this problem, 9 ASCC specimens with shear steel plate are tested subjected to the horizontal low cyclic loading, in which, the shear span ratio is 3 and axial compression ratio is different. The hysteretic curves of 9 specimens are obtained. The seismic performance indexes such as energy dissipation, stiffness degradation, strength degradation, skeleton curves and ductility of this kind of column are acquired, and the seismic fortification measures including ultimate values of axial compression ratio under different seismic degree are suggested.

1新型框架结构中所采用的角钢混凝土柱抗震性能的试验研究尚未见报道，针对这一问题，本文进行了9根剪跨比为3、不同轴压比、采用钢板箍的角钢混凝土柱在水平低周反复荷载作用下的试验研究，获得了9根试验柱的滞回曲线，考察了该类柱的耗能、刚度退化、抗力衰减、骨架曲线及延性等抗震性能指标，建议了角钢混凝土柱在不同抗震等级下的轴压比限值等抗震构造措施。

Think that the company manages the demand resolves three problems: Under the situation of ownership with controlling the power separation, the solution executive entrusts the agency problem with the shareholder, from but guarantee the shareholder benefits maximize; In gather medium-sized ownership of a share construction nextly, how moderate the problem of the proprietor a benefits, especially protect the small shareholder was not infringed upon by the big shareholder: Under the situation of the shareholder pursues the benefits to maximize, moderate the benefits related it the problem of a relation.

认为公司治理需要解决三个问题：在所有权和控制权分离的情况下，解决经营者和股东之间的委托代理问题，从而保证股东利益最大化；在集中型的股权结构下，如何协调所有者之间利益的问题，特别是保护中小股东不被大股东侵犯；在股东追求利益最大化的情况下，协调利益相关者之间关系的问题。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样