置换

The principle of digest is introduced in this paper and the method of calculation on the distance between two circle wire s has been given.

根据麦草制浆过程中蒸煮与洗涤特点，提出了一种适于麦草置换蒸煮与锅内置换洗涤的蒸煮锅结构，介绍了其工作原理，并给出了环形滤网间距计算公式。

The hospital can make very difficult operations such as resection of hepatic lobes, ablation of encephaloma, radiofrequency catheter ablation of preexcitation syndrome with atrical-ventricular tachycardia, installation and monitoring of permanent artificial pacemaker, artificial joint replacement of femoral necrosis, total hip revision arthro-replacement, posterior vitrectomy combined with autologous serum blocking macular hole, mouth floor jow and neck combined radical operation of oral carcinoma etc..

医院能开展肝叶切除术、脑瘤摘除术、射频消融治疗综合症合并室上性心动过速、永久性人工心脏起搏器安装与监测、股骨坏死人工关节置换术，全髋翻修置换术、后段玻璃体切除术、气液交换术、自身血清封闭黄斑裂孔，口腔癌口底颌劲联系根治术等高难度手术。

Lividans. Using pIJ903 bearing tsr gene as a vector, the two furthermost fragments of the cluster, 4. 0kb and 1. 5kb in size respectively, were inserted into it. To facilitate the detection of gene replacement, apr gene was placed in the middle of the two inserts. OriT from E coli plasmid RK2 was also incoporated into the vector, therefore, pIJ903 derivatives can be mobilized from E.

在具有硫链丝菌素抗性基因的pIJ903的单—BamHI位点，同向插入了FR-008生物合成基因簇两个最远端的4.0kb和1.5kb片段，并在二者之间插入了可在链霉菌FR-008和变铅青链霉菌中表达的阿泊拉霉素抗性基因，同时也插入了有助于将质粒引入链霉菌的oriT片段，从而构建出了置换整个基因簇的基因置换质粒pHZ691。

A retrospective study design was conducted by using chart reviews to choose patients who received unilateral primary total hip and knee replacement (International Classification of Diseases, Ninth Revision, Clinical Modification procedure code of 81.51 and 81.54) in two medical centers between 2001 and 2004. Patients were excluded from the study if they had had a bilateral in the same admission, fractures, previous arthroplasty surgery complication, bone cancer, pathological fractures, infection and hemophiliac.

采回溯性病历审查方式，选择台湾地区两家医学中心施行全人工髋及膝关节置换术的全部医师作为研究医师，以ICD-9-CM中之主手术码为81.51及81.54，排除符合同次住院施行双侧、骨折、先前手术的并发症、骨癌、病理性骨折、感染、血友病条件后，分别为716名及1，498名接受初次全人工髋及膝关节置换的病患。

OBJECTIVE To evaluate the clinical effect of total hip joint replacement and hemiarthroplasty in treatment of fracture of femoral neck in old patients.

目的 比较全髋关节置换术与半髋关节置换术治疗高龄股骨颈骨折的疗效和手术方式的选择。

In essence, stream cipher is such a pseudorandom generator that its chaos sequence of output and random sequence are computational indistinguishability; and the aim in designing block cipher materially is to design a pseudorandom permutation which is computationally indistinguishable from random permutations.

实际上，序列密码本质上就是一个伪随机生成器G，其输出的乱数序列和随机序列是计算不可分辨的；而分组密码的设计目标实质上就是设计一个伪随机置换，它与随机置换是计算不可分辨的。

If G is not of this form, H can be obtained by first performing a colunm permutation to put G into the form , and then performing the inverse permutation on .

如果G不具有这种形式，则可先通过列置换将G变换成形式，然后再对进行逆置换而得到H。

In terms of Latin squares, an isotopy is given by a permutation of rows α, a permutation of columns β, and a permutation on the underlying element set γ.

在拉丁方中，三元组由第α和第β列的一个置换以及其余集合上的一个置换γ给出。

This dissertation mainly investigated two frameworks of H-matrix, such as SPB framework consisting of integer Subscript matrix, Permutation matrix and Bidiagonal matrix and MSPT framework consisting of Masking matrix, sparse Subscript matrix, Permutation matrix and approximately lower Triangular array matrix.

本文主要研究了两种H矩阵的类随机框架结构模型，一是SPB框架，由整数下标矩阵、置换矩阵、双对角线矩阵构成；二是MSPT框架，由稀疏下标矩阵、模板矩阵、置换矩阵和近似下三角阵列矩阵构成。

The HIF-1αcDNA sequence was almost the same as formerly reported lowlander HIF-1αmRNA sequence, except for substitutions of T by A at 3360nt and T by A at 3383nt.

世居高原藏族人HIF-1αcDNA序列与以往报道的平原人HIF-1αmRNA序列相比，其3360位T被置换为A而3383位T则被A所置换。

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。