组合方法

The total cell number, the isolating time and the cell livability were evaluated in this experiment.

结果三种分离方法中以组合酶法得到的细胞总数最多、活细胞率最高、分离所需时间最短(P＜0.05)。

By utilizing the principle and method of the high-resolution sequence stratigraphy and fully collecting core and well log information, this paper systemmaticaly analyzes genetic facies and divides the depositional system of Carboniferous-Permian coal-bearing strata in Wenshang-Ningyang coalfield.

运用高分辨率层序地层学理论和方法，充分收集和整理钻孔岩心、测井曲线资料，对汶宁煤田的石炭—二叠系含煤地层进行了系统的成因相组合分析和沉积体系划分。

Phage display of recombinant human lymphotoxin mutation librariesand receptor affinity screeningContraction of conformable large molecule mutation library is pivotal for molecular evolution study in vitro. In order to extend the range of the screening region of amino acid in LT gene, several receptor binding sites of LT were mutated randomly by overlap PCR amplification with the random nucleotide primers, the R46, S106, L130 combined site-directed random mutation library and R46~A52, S106~F110, R46~A52 + S106~F110 region random mutation libraries of rhLT were constructed successfully.

二。重组人淋巴毒素噬菌体库的构建及受体亲和筛选构建适合的大容量生物大分子变异体文库是进行体外分子进化研究的关键，为了扩大LT基因序列中被筛选的氨基酸范围，我们采用含随机核苷酸序列的引物，通过Overlap PCR的方法对LT的受体结合区域进行多点随机突变，分别构建了rhLT R46+S106+L130三点随机突变组合文库和R46～A52、S106～F110、R46～A52+S106～F110区域随机突变体库。

Martingale approach is introduced to solve the problem of optimal portfolio in complete markets.

介绍了在完备市场下用鞅方法解决最优投资组合的问题。

The Boston consultation group matrix is a useful tool in enterprise product combination making process.

波士顿咨询集团矩阵是由波士顿咨询集团首创的一种规划企业产品组合的方法。

The matrix representation of GLKC is given on the basis of topological characteristics of GLKC, so the problem of the mathematical description is solved successfully for the type synthesis of GLKC.

进而分析了GLKC的结构不变量，根据这些结构不变量，给出了GLKC同构判定的一般方法，即利用组合矩阵的幂序列成功地解决了GLKC的同构判定问题。

The theoretical maximum reductions under the condition of all combinations of the parameters are obtained,which is verified by the experiments,based on the maximum reduction criterion and the optimism method.

提出了极限变形程度的判别准则，借助优化方法得到各参数组合下的理论极限变形程度，并进行了实验验证。

In this new model, the fuzzy-Markov theory is applied to analyze and predict the state transition of the uncertain factor in SPA model. By this way, the precision can obtained a significant improvement. Based on the correlation coefficient and mean square deviation of eigenvalue, two verify methods for fuzzy-Markov fitting in multidimensional space are suggested.

针对fuzzy-Markov子系统，分别提出了基于相关系数和特征值方差的多维空间模糊马尔可夫链拟合效果检验的两个新方法，并据此定量考察fuzzy-Markov子系统对参数响应的敏感性，用以确定最佳的模型参数组合。

There are many types of filtering methods, such as the limit speed filter and limit amplitude filter used in the program determination method, mean value filter, arithmetic average filter, sliding average filter, etc. This research adopts the combined average filter method that can eliminate the pulse interference.

有许多种过滤方法，如极限速度滤波和限幅滤波程序测定，均值滤波器算术平均滤波，滑动平均滤波等本研究采用了组合平均滤波法，能有效消除脉冲干扰。

In Chapter 2,I consider a queuing system in which there are two exponential servers, each having his own queue, and arriving customers will join the two queues separately, and analyze the two-dimensional Markov process representing the numbers of jobs in the two stations. A functional equation for the generating function of the stationary distribution of this two-dimensional process is derived and solved through the theory of Riemann-Hilbert boundary value problems. In Chapter 3, I consider the system with two parallel queues, in which arrivals join the shorter queue.I describe the problem of coupling and show that the generating function Fcan be continued as a meromorphic function to the whole complex plane.

全文包括三大部分：第一章介绍了基本的背景、研究进展和文章主要采用的方法；第二章研究的是有两个服务员共享的简单的排队方式的模型，即每个服务员有各自的队列，两队队长互不相关，分析了代表两个队长的二维马尔柯夫过程，推导出了二维过程的平稳分布的母函数的方程，并运用Riemann—Hilbert边值问题理论解出了母函数的表达式；第三章研究的是JSQ-PS模型(the joining the shortest queue model with processor sharing)，模型是组合了加入最短队模型和处理器共享模型而成的有用排队模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。