离散

Within the active periods, recurrence interval distribution has relatively large discretion, and can be well-fitted by a Weibull distribution. While the duration's distribution of the quiet periods has relatively small discretion, and can be described approximately by some distributions as the normal and so on.

其中，活跃期内地震复发间隔分布的离散性较大，可用Weibull分布近似描述；而平静期的持续时间分布的离散性较小，可用正态等分布近似描述。

In present paper a three-dimensional discrete vortex filament method is put forward to simulate the motion and bubble entrainment of an inviscid,incompressible vortex ring .

本文发展了三维离散涡模型用于模拟无粘不可压缩涡环的发展及其与气泡的相互作用，涡环被离散为平均分布在其中心线上的球形涡元，由Biot-Sarvart定律叠加每个涡元的诱导速度得到涡环的运动速度。

The Eddington scheme is slightly more accurate in thicker optical depth region, while the two-stream DISORT is more accurate in the thin optical depth region where the solar zenith angle is less than 60 degree. Second, we compare the two two-stream schemes in a realistic atmospheric profile with gaseous transmission considered.

对于单层大气，Eddington 近似在光学厚度大的时候比二流离散纵标法更精确一点；而二流离散纵标法在光学厚度小且太阳天顶角小于60 度的时候更准确。

An optimization design example of sleeve roller chain transmission was given ,and it show that the optimization result accords with practical production.

开发了混合离散变量优化的改进遗传算法程序，给出了套筒滚子链传动的混合离散变量优化设计的实例，所得优化参数符合实际生产的要求。

Two test pieces with satin surface and rib surface were designed under conditions of different distribution of heat flow density and different air flux.

流场计算中，采用同位网格上的SIMPLER算法和低雷诺数κ-ε湍流模型，对流扩散项采用SMART格式离散；温度场计算中采用整场离散，整场求解。

Finally, we establish rational spectral formation of discrete with regard to time and space, and gained the error estimate in the finite-time in the abstract.

最后，我们构造了同时关于时间空间方向离散的谱格式，并从理论上建立了在有限时间上的全离散格式近似解的误差估计。

The paper also study the variable control of uncertain system and the variable control of time lag system. At last adopt this discrete approach law in Series-wound Active Power Line Conditioner control.

同时对不确定性离散变结构系统和时间滞后不确定系统进行了分析；最后用离散变结构控制方法对串联型有源电网调节器进行控制。

The new calculation method of structural surfaces with different scales is given on the basis of block discrete element method in which contacts face to face. Moreover, a new discrete element model for simulating rock and soil blasting problem is built. The elements of new model can be split by itself in the program. There are small scale blocks around the charge, and large scale blocks are adopted in far zone.

在块体离散元面－面接触的基础上，给出不同尺度结构面的计算方法，建立离散元对岩土爆破模拟的计算模型，实现块体白分裂计算程序，在药包附近采用小尺度块体，远区采用大尺度块体，可以更为准确地描述爆破载荷下岩体结构面的尺寸效应。

The new circumstances that the discrete manufacturing enterprise is confronted with are analyzed; the function and configuration of production system is expounded; the research actuality and contents about production system capacity in the discrete manufacturing enterprise are summarized; the main research contents in this paper are developed.2. The calculating and analytical methods about production system capacity are studied systemically, a model to calculate rough-cut capacity instantly in "excel" table style is designed, the means to analyze production capacity in different production mode are brought forth, and the balance tactics of production capacity versus load are put forward.3. The application characteristics used in production system about the methods of Computer simulation and CRP in the MRPII/ERP are analyzed and compared; the advantages of Computer simulation method are pointed out; and the simulation researches aiming at production system capacity are implemented by Ithink simulation software.4. A simulation model is founded under the analysis of production system capacity in the production system background of a firm; the change instances of yield, output rate and WIP in the production system are simulated by the action of procurement cycle, machining time, setup time and so on. 5. The change instances of production capacity in the assembly stage are simulated , and rational employees are obtained.

本文主要进行了以下几个方面的研究：1、分析离散型制造企业面临的新情况，阐明生产系统的功能和结构，对离散型制造企业生产系统生产能力的研究内容和现状进行分析，提出本课题的主要研究内容。2、在系统地研究生产系统生产能力的计算和分析方法后，设计了用Excel表快速计算粗能力的方法；给出不同生产方式下的产能分析方法，并提出产能与负荷平衡的策略。3、比较和分析了MRPII/ERP的能力需求计划方法与计算机仿真方法在生产系统中的应用特点，指出计算机仿真方法的优势，并用Ithink仿真软件对企业生产系统生产能力进行了仿真研究。4、以A公司的生产系统为背景，在对生产系统生产能力分析的基础上建立了仿真模型，模拟了在采购周期、加工时间、调整时间以及返工率、废品率、机械开工率等因素作用下生产系统的产量、产出率和在制品数量的变化情况。5、研究在装配阶段生产能力的变化情况，通过仿真优化后确定合理作业人员数量。

The UV curable TiO2 sol is prepared to form TiO2 thin film with 3μm critical dimension TiO2 nanocrystal island array by mixing TiO2 powder, dispersant, emulsifier, alcohol and UV-curable resin.

混合TiO2粉体、分散剂、乳化剂、酒精和光固化树脂等，制备可紫外光固化的TiO2溶胶，并经步进压印形成宽度为3μm的具有离散纳米晶岛微结构的薄膜，经保压复型优化压印工艺后处理，保证了离散纳米晶岛微结构的高保真度。

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