置换

A large number of hospitals in the region to fill gaps in the history of technology, such as in 1958 to carry out the chest tumor; in 1959 discovered the first case of leptospirosis in the region; in 1960 discovered the first case of scrub typhus in the region; in 1961 to carry out two rheumatic heart disease Closed mitral dilation and liver resection; in 1963 to carry out low-temperature under anesthesia for congenital pulmonary valve stenosis open heart surgery; in 1969 to carry out the tumor radiation therapy; implemented in 1975 brain tumor resection; in 1981 to carry out the second tip Valve replacement; in 1982 to carry out artificial joint replacement; in 1983 for the installation of a patient implantable artificial heart pacemaker .......

医院有着大量填补本地区技术空白的历史记录，如1958年开展胸腔肿瘤切除术；1959年发现本地区首例钩端螺旋体病；1960年发现本地区首例恙虫病；1961年开展风湿性心脏病二尖瓣闭式扩张术和肝叶切除术；1963年开展低温麻醉下先天性肺动脉瓣狭窄心脏切开直视手术；1969年开展肿瘤放射治疗；1975年施行脑瘤切除术；1981年开展二尖瓣置换术；1982年开展人工关节置换术；1983年为病人安装埋藏式人工心脏起搏器……。

2In the combination between one of the representations of Surrealism "space exchange" and stereography, reflection hologram can produce the best spatial sense and it also conforms to the Surrealistic style of "space exchange".

2在超现实表现手法「时空置换」结合立体影像媒材中，经过实验后发现反射式全像媒材表现空间感最佳，也是较符合「时空置换」超现实风格。

In addition, the longest common subsequence method can well define the distances between different permutations.

另外，采用最长公共子序法度量置换距离可以比较准确的反映不同置换之间的差异性。

Chapter II of the Seventh String Quartet in general on the background, with pitch-class set theory analysis of three replacement sound relationship between the unified group of pitch throughout the whole idea of music, as well as the theme of fragment replacement pitch twelve-tone theme with a free form.

第二章大致阐述第七弦乐四重奏创作背景，用音级集合理论分析出三音组音高置换关系统一贯穿全曲的思路，以及主题片段音高置换与自由十二音主题形态。

Objective To compare the variability of adverse effects between BD closed tightly type detaining venepuncture and ordinary scalp venepuncture,and investigate the clinical effects applying BD closed tightly type detaining venepuncture in plasmapheresis.

目的 比较血浆置换术中采用BD密闭式静脉留置针技术与常规静脉穿刺出现不良反应的差异性，探讨BD密闭式静脉留置针技术在血浆置换术中应用的临床效果。

It is an important consideration in purification circuits that removal cadmium completely prior to cobalt cementation, because cadmium can inhibit basic zinc sulphate to adsorb on the surface of zinc dust.

镉可以起到阻止碱式硫酸锌或氢氧化锌吸附在锌粉表面的作用。欲加速钴的置换和提高置换效率，必须形成锌-钴合金或锌-镉合金。

A thermodynamic analysis of cementation of Ag with Cu in ammoniacal solution has been carried out. The calculated results indicated that this cementation reaction is possible thermodynamically.

进行了氨性溶液中Cu置换Ag的热力学分析，计算结果表明，该置换反应在热力学上是可能的。

Methylpyridine-coordinated ruthenium benzylidene complex 62 shows thehighest catalytic activity. TOF=960 h~(-1) is achieved during RCM reaction of 50, TOF=4 h~(-1)is obtained during the CM reaction of acrylonitrile with 1-decene.

其中，2-甲基吡啶配位的钌卡宾配合物62的催化活性最高，在催化烯烃50闭环交互置换反应时TOF可达960 h~(-1)；催化丙烯腈与1-癸烯交叉交互置换反应时TOF达到4 h~(-1)。

Based on studies of RCM reaction of 50 and CM reaction ofacrylonitrile with 1-octene or 1-decene catalyzed by pyridine derivative-coordinatedruthenium benzylidene complexes, it can be concluded that ruthenium benzylidene complexwith the more labile dissociating ligand exhibits the higher initial activity and better catalyticperformance.

吡啶衍生物配位的钌卡宾配合物催化含氰基烯烃50闭环交互置换反应和丙烯腈与1-辛烯、1-癸烯交叉交互置换反应表明，催化剂中吡啶衍生物配体越易解离，其初活性越高，催化活性越好。

Objective To compare the effects of hip arthroplasty and AO compressive cannular in treatment of the displaced fracture of femoral neck in elderly.Methods From 1995.5 to 2004.11, 78 elderly patients of over 65 years old with displaced femoral neck fracture were operated with hip arthroplasty and AO compressive cannular.

目的 比较人工关节置换术与AO加压空心螺钉术治疗老年人有移位股骨颈骨折的疗效方法将1995年5月～2004年11月我院收治的78例年龄在65周岁以上的有移位的新鲜股骨颈骨折患者进行回顾性研究，将病例分 A、B两组，A组为人工关节置换组，B组为AO加压空心螺钉治疗组。

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。