置换

For the Hopfield network in solving the traveling salesman problem offen getting unvalid and not optimal solution, this paper introduced a suitable radom initialization of the output values Vxi of permutation matrix to guarantee an effective solution, used the error produced by taking a larger step size and required new solution to be better than or equal to old solution so that the final result can jump out local minima to find the global optimal solution.

摘 要：针对Hopfield网络解旅行商问题经常出现无效解和局部优化解，本文给出置换矩阵的满足一定条件的元素Vxi作为初始值，以便得到有效解。此外，还利用较大的步长所产生的误差和对当前解必须优于或等于已有解的要求，使计算结果能从局部优化解达到全局最优解。

Objective:To study the effect of combine treatment with warfarin, low molecular weight heparin,clopidogrel and urokinase on throm in left atrium and machine valva.

目的：探讨华法令、低分子肝素钙、硫酸氯吡格雷和尿激酶联合治疗人工瓣膜置换术后血栓形成的疗效及安全性。

Methods:The 32 patients with throm in left atrium and machine valva were treated with warfarin,low molecular weight heparin,clopidogrel and urokinase.The therapeutic effect and safety were observed in these patients.

32例人工瓣膜置换术后血栓形成患者应用华法令、低分子肝素钙、硫酸氯吡格雷联合治疗，观察血压，心功能，凝血指标，血、尿常规及副作用。

Orange is short of calcic disease lamina advocate fade is green near arteries and veins and Xie Yuan, fade green place produces withered spot to fall off after, vimineous top is down withered dead.

当土壤偏酸，或土壤中氮。钾。镁偏多时，都轻易造成土壤中缺钙。所以应适当施用石灰，可中和土壤中酸，提高置换性钙的含量和肥沃度，能减少缺钙症发生。

Department of orthopaedics, Xiangya Hospital, Central-south University, Changsha, China3 Objectives: To study cervical adjacent zygapophyseal joint stress distribution following two level ADR and ACDF on, in order to provide biomechanical reference for clinical application of two level ADR. Methods: Eleven healthy adult fresh-frozen multi-segmental cervical spine segments were utilized in this study and biomechanically evaluated under the following C4/5, C5/6 cervical disc conditions:⑴intact spine;⑵he Bryan Disc prosthesis implantation;⑶the intervertebral fusion.

取11具新鲜完整的成人下颈段标本，按实验先后分别制成C4/5、C5/6椎间盘完整、椎间盘置换、椎间融合三个模型组，在标本上施加轴向分级载荷，将微型阻电式压力传感器置入C5/6、C6/7关节突关节内，测量合组各分级载荷下C5/6、C6/7关节突关节内的压力。

The results show that femoral head surface replacement is an effective method for young patients with avascular necrosis of the femoral head at the stage of ARCO III.

证实股骨头表面置换为比较年轻的ARCO Ⅲ期股骨头缺血性坏死的患者提供了一种比较好的治疗方法。

In addition to complex anion crowd carried by organic functional group, there were many kinds of mass point like aluminum, silicon, zinc and rare earth elements et al in composite elastic material, and there were replaceable cation as well as anion; besides, all cation kept rather distant each other. It was not easy to crystalize in composite elastomer because of the block of organic molecule.

在复合弹性体材料中，除了存在有机官能团所带有的络阴离子群之外，还同时存在铝、硅、锌和稀土元素等多种质点；存在可以置换的阳离子和阴离子，并且各种阳离子都保持相当远距离；由于有机分子的阻挡，复合弹性体内不易析晶。

In order to investigate whether the lysine 188 residue in the XRCC4 is chemically modified by the enzyme SIRT2 or not, I apply site-directed mutagenesis to alter this lysine to either arginine or glutamine, which mimicking the non-acetylating or fully acetylating of lysine residue.

为探讨具酵素功能之SIRT2是否对於XRCC4 188位置之离胺酸进行化学修饰作用，利用定位突变方式分别将该离胺酸置换成麸醯胺或精胺酸，试图模仿XRCC4离胺酸188乙醯化与去乙醯化，是否造成其对SIRT2之亲和力之改变。

Meantime, as life wears on, it proves a game of permission and combination of all possible positions of the parties, toem ploy all the resources of each, and acquaints each with the strength and weakness of the other. For it is the nature and end of this relation, that they should represent the human race to each other.

同时，随着生命的流逝，时间可以证实情感是一场游戏，相爱的人在这场游戏中进行所有可能的置换和结合，互相使用对方的一切，熟悉对方的长处和弱点，因为这种关系的实质和目的是向对方展示人类的本性。

Consequently the traditional allays, constructions and landscapes are changing, industrial facilities and function blocks are replacing, also the traditional way of life are disappearing.

传统的街巷、建筑和景观随之变迁，产业设施和功能区块随之置换，传统的居住生活方式随之改变。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。