置换

The generalized Walsh spectral characteristics and the generalized auto-correlation function characteristics of orthormophic permutations are studied by using of knowledge about the relation between orthomorphic permutations and vector Boolean functions.

运用向量布尔函数的知识研究了正形置换的广义一阶Walsh谱特征和广义自相关函数的特征，通过正形置换的广义一阶Walsh谱特征给出了正形置换的几种构造方法。

The orbits of the point stabilizer of a finite permutation group are called the suborbits of the permutation group. The determination of the suborbits of a permutation group is one of the basic problems in the permutation group theory. It plays an important role in the study of combinatorial structures.

一个有限传递置换群的点稳定子群的轨道称为该群的次轨道，决定一个置换群的次轨道结构是置换群理论的基本问题之一，它在组合结构的研究中有着重要的应用。

MAIN OUTCOME MEASURES: The pre and postoperative Harris scores for the hip, range of motion, periprosthetic radiolucency, leg-length inequality and complications were recorded and compared.

主要观察指标：记录并比较两组置换前/置换后髋关节Harris评分，髋关节活动范围，X射线假体周围透亮带，双下肢不等长及置换后并发症等指标。

In order to recover maximally the shoulder joint functions for post-artificial humeral head replacement, we must try our best to avoid soft tissue damage, reserve the bone of the tuberosity, select appropriate humerus head prosthesis, perform early post-operative staging rehabilitation, as well as maintain a normal retroversion of the prosthesis.

要最大限度恢复人工肱骨头置换后肩关节的功能，置换过程中要尽可能减少软组织损伤，尽量保留大结节部位的骨质，选择与关节盂大小匹配的肱骨头假体，早期分阶段功能锻炼，维持正常的肱骨头后倾角。关键词：肱骨近端骨折；人工肱骨头；置换

It is proved that two matrix tensor operation can be exchange at permuted similar and this kind permutation matrix is portrayed.

分析了分块矩阵张量积的相关数学特性，证明了在置换相抵意义下两个矩阵的张量积运算可以交换，特别刻画了这类置换矩阵，并由此证明了在置换相抵条件下分块矩阵可以分块地进行张量积运算。

Infections of 3 cases were controled after treatment with the wound dressing and compression bandaging after local inflammation organic resection, oral Xinhuang Tablets of proprietary Chinese medicines and antibiotics; 9 cases were treated with arthroscopic joint clean-up washing , 2 case of them were treated with incision debridement combined by synovectomy arthroscopic due to inability to complete debridement ; 3 case of them were treated with temporary prosthesis replacement surgery on the infection after total knee debridement due to recurring knee swelling and rupture , filling bone cement containing sensitive antibiotics, convection to wash on the articular cavity, and second phase renovation in stable condition, finally they recoveried postoperatively and discharged.

结果：对22例出现炎症性反应的TKA术后患者，经抗感染、关节腔对流冲洗、清创和Ⅱ期再置换并配合口服中成药新癀片等处理。10例轻微肿痛病人经单纯药物治疗，症状改善。12例患者应用外科干预， 3例行局部炎症组织切除后伤口换药并加压包扎，口服中成药新癀片及抗生素治疗后控制感染；9例在关节镜下行关节清理冲洗，其中2例在行关节镜下手术时因无法彻底清创行切开清创合并滑膜切除； 3例因反复出现膝关节红肿、疼痛、甚至破溃予全膝置换术后感染清创临时假体置换术，用含敏感抗生素骨水泥填充，对关节腔进行对流冲洗，待关节情况稳定后行Ⅱ期翻修，术后痊愈出院。

There were 3231 patients with isolated mitral valve replacement , 917 patients with isolated aortic valve replacement , and 48 patients with tricuspid valve replacement .

其中二尖瓣置换术3231例，主动脉瓣置换917例，三尖瓣置换48例，二尖瓣和主动脉瓣置换1296例，其他14例。

METHODS: A total of 22 patients with complex fracture of proximal humerus, managed by humeral head replacement in Changhai Hospital of The Second Military Medical University from June 2006 to December 2008 were collected, including 12 males and 10 females, with average age of 67 years (52-86 years). During the procedure, soft tissue damage was minimized, the bone of the tuberosity was reserved as much as possible, appropriate matching size of humerus head prosthesis was selected, and early staging functional rehabilitation was performed. Neer's scoring system was used to evaluate the treatment results after replacement.

回顾性分析2006-06/2008-12解放军第二军医大学长海医院骨科收治的肱骨近端粉碎骨折患者22例，男12例，女10例，年龄52~86岁，平均67岁；全部患者均采用人工肱骨头置换，置换过程中尽量减少软组织损伤，保留大结节部位的骨质，选择与关节盂大小匹配的肱骨头假体，早期分阶段功能锻炼，置换后采用Neer评分标准评价人工关节功能。

Objective: To explore the value of different surgicalmethods in the treatment of the displaced femoral neck fracture of the elderly.analyse joint function, complications, reversion factors Methods: An follow up study was done on 71 cases older than 60years who were treated with internal fixation, femoral head arthrop lasty and total hip joint replacement between 2000 and 2005 to compare the difference upon operation time, blood loss, duration of hospi-talization , joint function evaluation one and two years after operation , complications and reversionrate.

目的：探讨加压空心螺钉内固定术、人工股骨头置换术和人工全髋关节置换术在治疗老年人移位性股骨颈骨折中的临床价值。分析术后髋关节功能、并发症、二次手术或翻修率等相关因素。方法：对2000—2005年于长春中医药大学第一附属医院骨科收治的71例60岁以上移位性股骨颈骨折患者进行了随访研究，比较AO加压空心螺钉内固定术、人工股骨头置换术和人工全髋关节置换术在手术时间、出血量、住院时间、术后下地时间、术后12个月和24个月的髋关节功能评价、并发症以及二次手术率方面的差异。

Spinel is a compound of magnesia and alumina(Al2O3) and is thus a magnesium aluminate(MgAl2O4), found as accessories in igneous rocks, in metamorphosed aluminous schists, in contact metamorphosed limestones and sometimes in high temperature iore veins.

尖晶石主要成分是氧化镁和氧化铝，结晶习性是等轴晶系漂亮的正八面体。镁被铁置换就是铁尖晶石，被锌置换就是锌尖晶石，铁完全置换镁形成磁铁矿，铬置换铁尖晶石形成铬铁矿，这些类质同相的等轴晶系都是八面体结晶的尖晶石族矿物。

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。