合理值

On the basis of existing LBM models for micro-flows simulation,the velocity correction function for Knudsen layer was introduced into the model.

在已有滑移区微流动LBM模型中引入Knudsen层速度修正，选取合适的修正函数表达式并依据动理论确定了可调参数的合理取值。

A new mathematical model is put forward numerically to simulate the wheel ovalization.. In the numerical simulation, the dynamic model of a half railway vehicle coupled with a tangent track is employed. Using the new numerical method investigates vehicle-track coupling system dynamic responses including lateral and vertical displacement of wheelsets and the vehicle, lateral and vertical vibration acceleration of the track at different phase angle of the two side wheels of the same wheelset, which are compared with that of the traditional model. The numerical results show that the discipline and frequency of dynamic responses are accordant, amplitude and phase of lateral dynamic responses are different. It is concluded the traditional track geometric irregularity excitation model does not simulate the effect of periodic wheels ovalization on vehicle-track coupling system dynamic behavior truly, the new model is more accurate and reasonable.

本文研究了车轮二阶周期性非圆化—椭圆化，建立了一个新的模拟车轮椭圆化的数学模型，结合车辆－轨道空间耦合动力学模型，计算了同一轮对左右车轮不同相位和车轮椭圆度下轮对和车体的横、垂向位移，钢轨横、垂向振动加速度，并与传统模型计算结果作了对比，分析表明两种模型的动力响应变化规律和频率一致，但横向动力响应幅值和相位均存在不同程度不可忽略的差异，因此传统的轨道几何不平顺激励模型不能真实模拟车轮的周期性椭圆化对车辆－轨道耦合动态行为的影响，而本文模型更能反映实际椭圆车轮与钢轨接触情形，计算方法准确而合理。

And it is expected to replace the expensive organic polymer coagulants which were often suspected of being dangerous to human.The preparation technique of HSPSAS was introduced in this paper. The parameters of the process were discussed by the method of orthogonal design, such as molar ratio of Al/Si, the pH of polysilicate, the aging time of polysilicate, the pH of PSAS, the aging time of PSAS, intake of PSAS, and so on, and then an optical technology was obtained.

本文介绍了聚硅酸硫酸铝絮凝剂的制备工艺，并利用正交设计的方法，对其中Al/Si摩尔比、硅酸熟化pH值、聚硅酸熟化时间、药品熟化pH、药品熟化时间、投药量等制备参数进行了分析和讨论，得到优化的制备条件，确定了更为合理的制备工艺。

On the basis of analysis, the prestress number of cable is ascertained.

对它进行了非线性静力分析，在分析的基础上，合理确定了拉索的预应力值。

On the basis of the formation pressure,rational underbalance pressure and drilling fluid density are determined.

以最优的钻井成本，能实现最容易和最安全的钻井施工来衡量欠压值选得是否合理。

By means of the model, the one-dimensional distribution of gas temperature, heat flux density on the waterwall and the heat release rate of the coal for virous operating conditions could be computed reasonably.

应用此模型可以对在各种结构参数、各种运行负荷、各种煤质特性参数及风、粉配额等条件下的煤粉锅炉炉膛介质温度、水冷壁吸收热流密度和燃料释热率等热力参数的一维分布值进行合理计算。

After that, the author, based on the wasteless mining theories and his research experience, put forward creatively a new method to design and appraise for the wasteless mining, in which the modern applicable visualization technique are applied.

在采矿方案优选方面，发展应用模糊数学与层次分析法的组合决策优化方法对无废开采方案优选的指标体系、权值的分析处理与系统进行了综合评判，并建立了系统实用的方案优化选择数学模型，以获得最佳、合理的无废开采方案。

In this paper, the effects of the rigid body motions and low frequency surface errors on the image quality were analyzed. Quadratic equations were used to build the mathematical model of the Wolter type I and II X-ray telescopes and reduce the computational complexity of ray tracing. With the help of a self-developed optical surface analysis code, the effects of the perturbations of the mirrors on the image quality was analyzed and the growth of the image spot formed by deformed telescopes was calculated, this is important for giving the reasonable fabrication tolerance.

在本篇文章中，详细分析了刚体运动误差和低频表面误差对成像质量的影响；使用空间解析几何学的二次曲面方程建立Wolter I、II型X射线掠入射望远镜镜片的数学模型，降低光线追踪的计算复杂度；借助自主开发的光学仿真软件分析了国内研制的X射线成像望远镜的刚体运动误差和低频表面误差对成像质量的影响，计算出像点艾里斑半径均方根值随误差变化的增长率，对工程上提出合理的制造公差的误差容限有重要的指导意义。

For a higher yield, the multibranch well bore should be perpendicular to the direction of maximum principal permeability, b. for a given coalbed methane reservoir, there is an optimal interspace, by which a bigger control area and the interaction among the branches can be obtained, and c. with the extension of the branch, gas yield becomes obviously higher, while the branch length should be an appropriate value on account of the influence of coal bed boundary and wellbore pressure drop. The research results have guiding significance for well pattern optimization and efficient development of coalbed methane gas.

结果发现：为了获得较高的产能，多分支井的井筒应垂直于最大主渗透率方向；对于给定的煤层气藏，存在一个最优的分支间距，既能保证较大的控制面积，又能保证分支间的互相影响；随着分支长度的增高，产气量也显著增大，但是考虑到煤层边界和井筒压降的影响，分支长度也应该有一个比较合理的值。

according to the mechanism of bitter formation, the bitter taste masking technology is classified into different sorts from different taches that disturb the bitterness formation, include adding the taste correcting substance to confuse the cerebral taste; staving or preventing the drug releasing in mouth and segregating the contact between drug and taste buds; anesthetizing the taste cell to enhance the threshold of bitter taking; preventing bitter taste receptor combining with bitter blocker, cutting off the signal transduction pathways etc.summerize the methods of taste masking technology,besides,describe the method's advantages and disadvantages, and the technology of preparation.provide academic direction for the reasonable use of bitterness taste masking.

依据苦味形成机理，从干扰苦味形成的不同环节将中药苦味掩味技术分为添加矫味剂，混淆大脑味觉掩盖药物苦味；延缓或阻止药物在口腔释放，隔离药物和味蕾的接触；麻痹味觉细胞，提高苦味感受阈值；阻止苦味受体与苦味剂的结合，切断信号传导掩盖苦味等4类，综述掩盖中药苦味的方法，并简述各方法的优缺点和制备技术，为合理应用苦味掩味技术提供理论指导。

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。