置换的

If we study further the characteristic of this algebraic structure under the action of permutation group elements, it would provide a new approach to solve the problem about the renormalization of noncommutative scalar fields.

如果进一步考察该代数形式在置换群作用下的置换性质，就为我们提供了一种完全解决非对易标量场重整化问题的一种可能途径。

Objective To analyse the failed total hip arthroplasty and to improve its long-term results.

目的对人工髋关节置换术后失败的病例进行分析，总结经验，提高人工髋关节置换术的长期疗效。

BACKGROUND: Prosthesis selection for total hip replacement is determined by geometrical matching with femoral medullary cavity of patients and the optimal biodynamics. It is of great significance for elevating outcomes of total hip replacement.

背景：人工髋关节置换术前选择假体时，不仅要考虑在几何学上达到与患者股骨髓腔的匹配，而且还要在生物力学性能上达到最优，这对提高全髋关节置换术后疗效，具有较现实的意义。

As the displacer moves, the gas leaks around the gap between the displacer and the cylinder wall.

作为置换剂的举动，周围之间的置换剂和汽缸壁间隙气体泄漏。

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 addition, some patients chose to have a traditional total hip arthroplasty instead of a resurfacing arthroplasty.

此外，也有些患者愿意进行传统的全髋关节置换，而不是髋关节表面置换。

In addition, some patients chose to hae a traditional total hip arthroplasty instead of a resurfacing arthroplasty.

此外，也有些患者愿意进行传统的全髋关节置换，而不是髋关节表面置换。

BACKGROUND: Common complication of traditional joint replacement is hip joint dislocation and large head joint implant can effectively solve this problem.

背景：传统髋关节置换最常见的并发症是置换后髋关节脱位，而大头关节能有效地解决这一问题。

Hip replacement and knee replacement were used to ease hip or knee pain caused by bone arthritis.

髋关节置换术和膝关节置换术常用于缓解由于骨关节病导致髋或膝关节的疼痛。

OBJECTIVE: To summarize classification of knee joint, techniques of knee replacement surgery and complications following replacement.

目的：对膝关节假体的分类、膝关节置换手术技巧及其置换后并发症等方面进行归纳总结。

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。