可行

The projection gradient method will be a possible way to solve the problem that we just get. It has been shown that the projections of the every directions, of which is the boundary point in linear restraint problems, are the possible decent directions, and the projection of negative grads direction is a decent direction. In 1960, Rosen proposed the basic idea of projection gradient methods, and then lots of researchers have been tried to find the convergence of this method. But most of them get the convergence with the condition to amend the convergence itself.

在约束最优化问题的算法中怎样寻找有效的下降方向是构造算法的重要内容，在寻找下降方向方面可行方向法中的投影梯度法有效的解决了下降方向的寻找问题，利用线性约束问题边界点的任意方向在边界上的投影都是可行方向，而负梯度方向的投影就是一个下降方向。60年代初Rosen提出投影梯度法的基本思想，自从Rosen提出该方法以后，对它的收敛性问题不少人进行了研究，但一般都是对算法作出某些修正后才能证明其收敛的，直到最近对Rosen算法本身的收敛性的证明才予以解决。

Chapter 1 put forward several new concepts and methods,such as subfeasiblemethods and strongly subfeasible methods in Definition 1.2.9,two-step quadraticallysuperlinear convergence and strong two-step quadratically superlinear convergence in Definition 1.2.7 (5,6),and so on.

第一章提出几个新的概念和方法，如定义1.2.9的次可行方法和强次可行方法，定义1.2.7（5，6）的两步超二次及强两步超二次收敛等。

Methods According to the "Technical Guidelines for Pre-evaluation for Occupational Hazards in Construction Project", the evaluation contents were investigated and analyzed termwise, which included investigation of whole production process, identification of the occupational hazard factors type in the production process, analysis of the damage degree, feasibility evaluation of protective measures, and reasonable and feasible suggestions for improvement were given.

按照《建设项目职业病危害预评价技术导则》对评价内容进行逐项调查和分析，了解生产工艺的全过程，识别生产中存在的职业病危害因素的种类，分析其危害程度，评价采取的防护措施是否可行，并提出合理、可行的改进建议。

The synthesis techniques of sparfloxacin zinc was feasible, the quality of sparfloxacin zinc ointment could be controlled by effective standard procedure, and clinical effect was eminent.

司帕沙星锌合成工艺可行，软膏剂成品品质可控，疗效显著，该方法简单可行，适合于临床应用和推广。

On the basis of double attributes of land as resources and assets, this paper puts forward the significance of implementing the bank of land use right in our country. By means of comprehensive analysis and antitheses, it sets up the mode of urban and rural bank of land use right, analyzes the problems that might arise in the course of the bank establishment, and proposes the solutions, concluding that it is feasible to implement land use right bank in our country.

基于土地具有资源和资产双重属性的特点，阐明在我国实行土地使用权银行的意义，通过文献资料法、对比法、综合分析法，建立了农村和城市土地使用权银行模式，最终分析了建立土地使用权银行可能带来的问题，并提出了可行的解决方案，认为在我国实行土地使用权银行是可行的。

Samples are extracted using a mixture of acetonitrile/water/diethylamine and the analytes are subsequently converted to trimethylsilyl derivatives for analysis.

我没挑刺，食品俺确实不懂，我想说的是，虽然我也不相信奶农能把三聚氰胺加到饱和，但是在理论上确实可行，或者更严谨的说接近于可行。

It has been suggested to be feasible to differentiate normal and cancer or latent carcinoma cell by construction of specific gene bank by suppression reduction hybrid and gene chip technology,and to study on whether the incisal edge is complete or not.

研究证明，应用抑制性削减杂交和基因芯片技术构建肿瘤的特异性基因库，将正常细胞和癌变或潜在癌变的细胞鉴别开是可行的，从基因水平上研究肝癌手术切缘干净与否是可行的。

There exits several MDO algorithms. But they are in our opinion either nonefficient or complicated. So we devised an algorithm called Subspace Approximation Optimization . In the SAO algorithm, the whole system is decomposed into one system-level optimization and several disciplinary optimizations so that a large and complicated problem can be divided into several easy-solving sub-problems. The coupling relationships and the coordination among disciplines are presented by equality constraints and these equality constraints are assigned to relevant disciplines. The optimums of design variables in system level optimization are transferred to discipline level optimization. The optimums of design variables in discipline level correspond to the point that is the nearest to the optimums of design variables in system level. If the optimums of design variables in system level are out of feasible region of discipline 1eve1, linear constraints can be built in the system level optimization using the design variable optimums obtained by the discipline level optimization. The system level optimization would improve the design of the whole system with these linear constraints.

目前，国内外已经发展出了多种飞机多学科设计优化算法，本文的重点是针对协同优化算法的不足，提出了子空间近似优化算法(Subspace ApproximatingOptimization，SAO)，SAO算法中，整个系统的优化问题被分解成一个系统级优化和若干学科级优化，而各个学科之间的耦合与权衡关系则被当作等式约束，这些等式约束将被分配到各个学科级优化中去，系统级优化的任务是寻找整个系统的最优解，而学科级优化的目标函数是以系统级优化分配下来的设计点为圆心的超球半径的平方，因此，如果系统级优化分配下来的设计点在学科级优化可行域内，则学科级优化目标函数为0，反之，则学科级优化的最优点是系统级优化当前设计点距离可行域最近的点。

In low permeability boundary oil field, applying this technology can make the field development to be profitable. In Changyuan Oii field, this technology can save a great deal of natural gas, which has significant importance to the extension of field development life and increment of EOR.

在外围低渗透油田中采用常温和低温集油化学剂技术，可使低产区块的开发由经济上不可行变为可行；在长垣油田应用低温和常温集油化学剂技术，可节约大量的天然气，这对延长油田开发周期和提高原油采收率具有十分重要的意义。

A 2. 5～5. 5 MHz transducer was used according to the acoustic depth of the heart examined. Group B was used x-ray fluoroscopy (a Philip mono-rotatable C arm X-ray equipment) as image guide with routine method reported by american college of cardiology cardiovascular technology assessment committee. TTE guiding CSC in site: The guide wire was inserted into left subclavicular vein and inferior vena cava and it was displayed clearly by TTE. The sheath could be displayed clearly too by TTE. CSC was put through the sheath into right atrium in prone position and was thoroughly showed by TTE via untypical parasternal four-chamber view.

本研究对60例心内电生理检查患者，应用TTE作为影像学引导的可行性和临床应用的方法学进行了探讨，并对5只犬TEE引导射频导管消融术时大头电极导管到位的可行性进行了动物实验研究，具体为：(1)专用冠状窦电极导管置放时TTE引导的可行研究；(2)普通电极导管置放时TTE引导的可行研究；(3)专用冠状窦电极导管和普通冠状窦电极导管置放时TTE的对比研究：(4)TTE引导His束电极导管和右室电极导管到位的临床应用研究；(5)TTE在心内电生理检查中的应用研究；(6)TEE引导射频导管消融术大头电极导管到位的实验研究。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。