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Events that cannot be staged because of their danger, cost, or inaccessibility are everyday computer simulator subjects.

由于危险性大,成本高,或者因不可接近性不能实物演示的事情都是计算机模拟装置的日常模拟对象。

The authors make basic research for the numerical calculation of cooling waters flow in the engines, on the bases of research results obtained with numerical method of incompressible fluid.

本文在作者已完成的不可压缩流体三维流动数值模拟研究的基础上,对发动机冷却水三维流动的数值模拟方法进行了基础性研究。

Optimal algorithm of combined nonlinear Hopfield network appears powerful validity in solving nonlinear planning, which includes nonlinear objective function, linear constrains and high-demension of decision-making variants, for its ability of nonlinear parallel computation. It is prominent among optimal algorithms because of its function of simply implement with electrocircuit hardware. Genetic algorithm is expressly suitable for optimal calculation regarding the planning of massive, highly nonlinear, inconsecutively differentiable and multiobjective function as well as objective function without analytical expression. However, it inclines to prematurity, as well as its limitation in ability of partial optimal search. Introducing the optimal algorithm of niche genetic simulated annealing to standard Genetic algorithm, can therefore improve the full-scale or partial search ability of Genetic algorithm effectively. It has a far-flung perspective in the field of systemic planning of water pollution control.

组合式非线性Hopfield网络优化算法所具有的非线性大规模并行计算能力在求解具有非线性目标函数、线性约束条件及高维决策变量的非线性规划问题方面显示出了强大的生命力,它易于电路硬件实现的功能更是在优化算法中独树一帜;遗传算法采用概率搜索技术,不受目标函数与约束条件的限制,特别适合大规模、高度非线性的不连续可微的多峰目标函数及无解析表达式的目标函数的规划问题的优化计算,但其存在容易早熟、局部寻优能力较差等缺点,本文在标准遗传算法中引入小生境技术及模拟退火算法有效地改善遗传算法的全局和局部搜索性能,提高了全局最优解的寻优质量,小生境遗传退火模拟优化算法在水污染控制系统规划中的应用前景极为广阔。

The combination methods of serializer for SA and Powell algorithms and incrustation for SA and simplex algorithms are given in this paper, and their combined steps elaborated for easy programme.

给出了模拟退火算法与单纯形法的镶嵌式结合方式以及模拟退火算法与鲍威尔法的串行式结合方式,并对其结合步骤进行了详细的阐述,以便于编程实现。

Finite element method was used to explore the nanoindentation process of several materials under Berkovich indenter. The simulated nanoindentation results with different tip radii were compared with experiments.

采用有限元方法模拟了纳米压痕中不同曲率半径针尖的压头压入不同材料的加、卸载过程,并对计算结果与实验进行了对比以验证模拟的可靠性。

10 Multifunction Intelligent DAQ using LabVIEW FPGA, 8 analog inputs, independent sampling rates up to 200 kHz, 16-bit resolution,±10 V,8 analog outputs, independent update rates up to 1.0 MHz, 16-bit resolution,±10 V,96 digital lines configurable as inputs, outputs, counters, or custom logic atrates up to 40 MHz,User-defined triggering, timing, and onboard decision making with 25 ns resolution,1M gate reconfigurable I/O FPGA for parallel processing power

2.10 使用LabVIEW FPGA模块的可重新配置多功能I/O,8路模拟输入、200 kHz同步采样率、16位分辨率、±10 V,8路模拟输出、1 kHz同步采样率、16位分辨率、±10 V,96条可配置的数字线,具有40 MHz输入、输出、计时器或自定义功能,25 ns分辨率的可配置触发、定时、板载决策,1百万门可重新配置I/OFPGA,带有82 kB嵌入式RAM

In consideration of the indeterminateness in spacetime distribution and pollution sources of sudden water pollution and on the basis of the time effectiveness of pollution control and remediation and the principle of decrease of pollution losses to a minimum, an analysis was made of the present situation of pollution accidents by flexible description of the pollution information, realizing a highly efficient simulation of the impacts of sudden pollution in rivers.

根据水污染事故发生、发展具有诸多时空和污染源类型不确定性的特点,以及污染事故控制与处理的时效性和最大限度减少损失的原则,采用弹性组织出事现场信息的方法,分析污染事故的基本状况,实现河流水污染突发事故影响状况的高效模拟。将GIS与水污染模型技术相结合,开发了适合长江三峡水环境决策管理的水污染事故模拟子系统。

Altogether, the paper contains four major parts:In part one, the character of digital channel is discussed, especially analyse and research the index of error bit, jetter and .

论文具体分为以下几部分:第一部分主要是对数字信道的特点进行研究,重点对数字网传输损伤中的误码、抖动和漂移等度量指标进行理论研究和分析,提出一种和以往的信道模拟思路完全不同的方法,即把数字信道的主要特性映射到基带来模拟

To inequality constraint s, a check procedure and a penalty function procedure are proposed, and equality constraints are dealt with by a procedure of solving equations in which tear equations may be converged by an iterating way or a penalty function way.

在无约束非线性规划问题全局优化的模拟退火算法基础上,进行有约束问题求解的进一步探讨,对不等式约束条件提出了检验法和罚函数法的处理方法,对等式约束条件开发了罚函数法和解方程法的求解步骤,并进行了分析比较,从而形成了完整的求取非线性规划问题全局优化的模拟退火算法。

Therefore, the stress and strain of a half infinite plane indented by a sliding spheric tip were calculated based on an elastic-linear strengthened plastic deformation model, making use of a commercial software.

选用20#钢、45#钢、T8钢3种材料作为研究对象,利用三维有限元法动态模拟刚性球形磨粒在弹-线塑性平板上的压入-划动过程,所用磨粒半径为0.15mm,试样尺寸为1.2mm×1.2mm×3.0mm,划动距离1.2mm;采用ANSYS/LS-DYNA软件对每种材料在压入深度0.01~0.10mm范围内进行10次动态模拟

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。