查询词典 numerical system

The mechanism of instability wrinkling in the process based on minimum energy principle is revealed, uniform mathematic description of the wrinkling wave on the strip of in-plane bending is established, the internal and external energy is deduced by energy method, and a uniform criteria of internal and external wrinkling is established; then how to combine the criteria with the FEM simulation system to make the numerical prediction of wrinkling into reality is also resolved in the paper. The effects of the forming parameters on the deforming result are analyzed by the uniform predict criteria. The results show as follows: as the compress width increase, external wrinkling first come into being, then internal winkling do, and finally in-plane bend occur; the loading wedge angle increase, internal winkling first come into being, thenin-plane bend do, and finally external wrinkling occur; in-plane bend is possible to occur with a increase of the strain-hardening exponent and the strength coefficient; and the effect of the friction factor may be ignored.

2揭示了板带不均匀压下面内弯曲成形过程基于能量原理的失稳起皱机理，提出了统一的描述内外缘起皱波形的函数，采用变分法推导了服从该波形函数的内外缘起皱能，建立了统一的起皱预测准则；将新建立的统一的起皱预测准则引入到数值模拟系统IBS中，数值预测结果与实验结果的吻合较好；分析了成形过程各参数对起皱的影响规律：随着接触变形区宽度的逐渐增大，先是发生外缘起皱，然后发生内缘起皱，进而才出现稳定成形；随着实际加载楔角的增大，先是发生内缘起皱，然后发生稳定成形，进而出现外缘起皱；硬化指数和强化系数增大，易于稳定成形；摩擦因子对起皱的影响不明显；而且接触变形区宽度对起皱的影响最大。

Three-dimensional numerical simulation of the combustion process in an alcohol engine, with a new type of spark-ignited direct-injection circularly stratified-charge combustion system, is carried Out. The computed pressure and heat release data coincide with the experimental results well.

利用混合燃烧模型对一台采用火花点火、缸内直喷、周向分层燃烧系统的醇类燃料发动机的燃烧过程进行了三维数值模拟，计算所得的缸内压力和燃烧放热速率与实验结果吻合良好。

The mechanical design and the study of controlling system part of the upright metal band-sawing machine enhance the saw cutting precision,it can operate without supervision while reduced the labor intensity and raise the working efficiency,it meet the needs of the total numerical control and network trend as well as possessed highly application and dissemination value.

立式金属带锯床的机械设计和控制系统的研究提高了锯切精度，实现了无人监控操作，降低了劳动强度，提高了工作效率，适应锯床全数控化、网络化的需要，具有很好推广应用价值。

The methods numerical simulation and design in this paper present a guidance to the design and application of large-scale solar chimney power plant system.

该文数值方法和设计方案为大规模太阳能热气流发电系统的设计和应用提供参考。

This paper develops a kind of quality control and data acquisition system which can feed the numerical value measured by the digital display dial gauge into the computer directly.

本文开发了一个微机数据采集与质量控制系统，可以将数显测微仪测量的数据直接送入计算机。

In order to perfect the theoretical system of "tectonic control of hazard", this thesis researches the control function of stratum inclination of monoclinic structure, fold shape and angle between two limbs of fold, normal fault direction of dip and fault inclination, forms of faults combination over coal-mining-induced subsidence by means of theoretical analysis and numerical testing.

为了进一步完善&构造控灾&理论体系，本文从典型煤矿区的地质条件和开采实际出发，在以往研究成果的基础上，通过理论分析和计算机数值试验，重点研究单斜构造的地层倾角、褶皱构造形态及其翼间角、正断层倾向和倾角及断层组合对采煤沉陷的控制作用。

The numerical analysis method of temperature field in rare earth electrolysis cell of fluoride system was studied in this paper.

研究了氟化体系稀土电解槽温度场问题的数值模拟分析方法，采用有限元法计算了新的电解槽温度场，其分析结果，为新槽体的开发设计提供了参考依据。

Study on temperature field in rare earth electrolysis cell by finite element method;2. The numerical analysis method of temperature field in rare earth electrolysis cell of fluoride system was studied in this paper.

研究了氟化体系稀土电解槽温度场问题的数值模拟分析方法，采用有限元法计算了新的电解槽温度场，其分析结果，为新槽体的开发设计提供了参考依据。

Effects of energy storage on the operation of cogeneration system areexamined through a numerical study on a gas engine-driven cogenerationsystem installed in a hotel and office building.

建立了带蓄能装置的热电冷系统的运行模型并给出相应算法，分别以办公楼和旅馆为例，对热电冷联产系统运行方式进行优化。

The study of it has been a hot topic in the field of numerical algebra in recent years. Actually, it is widely used in many fields such as structural design, system identification, automatics control theory, vibration theory.

它是近年来数值代数领域中研究的重要课题之一，在结构设计，系统识别，自动控制理论，振动理论等领域有着广泛的应用。

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