置换的

A fast algorithm for calculating the inverse and Moore-Penrose inverse of the permutation factor circulant matrix is presented. Then, a fast algorithm for the product of the permutation factor circulant matrix is given. Finally, The least-square solutions of inverse problems and the optimal approximation problems for the permutation factor circulant matrix are discussed.

首先给出了一种求n阶置换因子循环矩阵的逆阵、自反g-逆、群逆、Moore-Penrose逆的快速算法，然后给出了计算两n阶置换因子循环矩阵之乘积阵的一种快速算法，最后给出了其反问题的最小二乘解的存在性定理及它的一般表示，并证明了逼近矩阵的存在唯一性且给出它的具体表达式。

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。

In inorganic chemistry experiment teaching material,"the Measurement of the Molar Gas Constant by Displacement method" uses the magnesium method of substitution or the aluminum method of substitution.

摩尔气体常数的测定方法很多，在无机化学实验中，常采用置换法来测定。其方法为：取一定质量的活泼金属，与一定体积的已知浓度的酸反应，在一定的温度和压强下，测得置换出氢气的体积。

the hip knee joint replaces the technique the deep phlebothrombosis, are cause the fibrin, the red blood cell under each kind of factor function as well as not the isometric blood platelet and the white blood cell in the vein the clustering process, after is the hip knee joint replaces the technique, most common complication.

髋膝关节置换术后的深静脉血栓形成，是在各种因素作用下导致纤维蛋白、红细胞以及不等量的血小板和白细胞在静脉内形成凝块的过程，是髋膝关节置换术后最常见的并发症。

Estimating calculation method of consistencycan be used to calculate bleach agent consistency in the saturation water of fiber cell wall.. The main cause of the reaction rate of displacement bleaching being faster than that of conventional bleaching is that the bleaching agent consistency in the saturation water of fiber cell wall, when bleach liquor mix with pulp by displacement way, is bigger than that of by conventional way.

浓度估算法可用于估算漂剂在纤维细胞壁饱和水分中的浓度，置换漂白比常规漂白反应速度快的主要原因在于漂液以置换方法与纸浆接触混合后纤维细胞壁饱和水分中漂剂的浓度比常规方法的高。

Result］four of 9 patients successfully retained their component at most recent follow up, without ongoing infection (mean 18 months, range 10～25 months).we have not draw the statistically significant factors that related to successful and failure,but the factors such as acute infection, surfacing replacement, immediate debrided after onset of symptoms, and the bacteria sensitive to antibiotic were relate to success.

由于病例数较少，本研究针对可能影响清创成功的因素未能得出有意义的统计学结果，但从结果看：急性感染清创容易成功，而慢性感染则很难获得成功；表皮葡萄球菌成功率较高，金黄色葡萄球菌均失败；表面膝置换成功率较高，而铰链膝置换则难以获得成功；出现症状后应该抓紧时间进行清创，延误的时间越长，成功的可能性越低。

During the displacement, the low adsorption methane was always first to be desorbed and the high adsorption CO2 was late to be desorbed. The displacement results under the high pressure is always better than the low pressure.

在置换过程中总是吸附能力弱的甲烷首先解吸，而吸附能力强的二氧化碳最后解吸，而且较高压力下的置换效果总比低压下的好。

The dopings by Al and V had significant effects on the thermoelectric transport performances and could increase the thermoelectric properties of the CrSi_2 single crystal greatly.

Al或V置换掺杂对CrSi_2单晶的热电传输性能有重要的影响，在研究的温度范围内，Al或V置换掺杂会提高CrSi_2单晶的热电性能。

Computer-assisted TKA is a useful alternative to conventional TKA for knee arthritis with extra-articular deformity where accurate restoration of limb alignment may be challenging because of the presence of a deformed tibia or femur or in the presence of hardware.

计算机辅助全膝置换术是对伴有关节外畸形的关节炎常规的全膝关节置换术治疗的一种有效的替代治疗方法，由于胫骨或股骨畸形的存在或金属的存在，肢体对准线准确恢复也许是会面临挑战。

Many different prostheses have emerged, some with exceptional long-term results.Long-term prospective analyses will be critical in determining the role of UKA as a mainstay in the treatment of single compartment knee degenerative joint disease.

膝关节单髁置换术早期随访报告结果令人失望，但随着外科技术的进步、适应证的严格掌握、假体设计和手术器械的发展，现代膝关节单髁置换术的优良疗效国外已有大量报道，单髁系统临床效果大大提高，UKA的应用趋于增多。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐