求解过程
- 与 求解过程 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The Frechet derivative of the cost function is determined via the solution of an adjoint partial differential equation, and the boundary shape is then modified in a direction of descent. This process is repeated until an optimum solution is approached. The advantage is that the cost function variation is independent of the flow field variation, with the result that the gradient of cost function with respect to arbitrary number of design variables can be determined without the need for additional flow-field evaluations. So each design cycle requires the numerical solution of both the flow and the adjoint equations leading to a computational cost roughly equal to the cost of two flow solutions.
虽然他们的研究成果大多数都可以在公开性文献上看到,但是其中一些具体的细节问题的处理方法却没有透露,比如:伴随方程如何离散求解才能减小最终梯度计算中的误差,使得设计过程有效地进行;伴随方程与流动方程的边界条件是不同的,如何合理地处理伴随方程的边界条件,才能推动设计过程朝着设计目标而发展;在减阻问题中目标函数如何定义,求解梯度的具体数学公式如何推导,如何通过数值方法来实现它们等。
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Four basic processes are analyzed in detail in network security decision,which are the base of NSDSS security decision. Then, developing strategies and methods are analyzed according to the objective and task of the system. Antetype method with RAD speciality is chosen to lead the developing process of the system. The structure of "Four-Base and Seven-System" of NSDSS is decided, based on which, the Function and Structure of Man-Machine Conversation system, General Management system, Data Base system, Model and Method Base system, knowledge base system, Causing and solving problems system are discussed. The basic theories and methods of each part are discussed. In the designing process of Model Base System, detailed analysis is given to the models of prediction, evaluation and management in the course of security decision. Moreover, basic process and method are discussed on question generation and solution. Then, detailed explanation is provided on the integration and implement of the system. After that, it is suggested that implement of the system should be carried through the process of the system.
论文首先对NSDSS涉及到的相关知识进行了讨论,详细分析了网络安全决策中的四个基本过程,这是NSDSS进行安全决策的基础;随后依据系统的目标和任务,对系统的开发策略和方法进行了分析,选择具有RAD能力的原型法指导整个系统的开发过程;确定了NSDSS"四库七系统"的整体结构;在此基础上,分别探讨了人机对话系统、通用管理系统、数据库系统、模型库和方法库系统、知识库系统、问题生成和求解系统的功能和结构,对各部件的基本原理和实现方法进行了论述;在模型库系统的设计过程中,对安全决策过程中运用到的安全预测、安全评估、安全管理等模型进行了详细的分析;仔细探讨了问题生成和求解的基本过程和方法;较为详细地阐述了系统集成和实施的有关问题,面向系统的成功实现,提出了将系统实施贯串于整个系统开发过程中的思想。
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The sensitivity analysis which is based on the calculus of variations is used in the shape optimization. The design velocity field is solved by Herrmann method. An example shows that both the quality of the FEM mesh and the efficiency of the computing of the design velocity field are improved by Herrmann method.
算例表明优化过程中采用Herrmann网格均匀化法求解设计速度场,可以提高优化过程中网格的质量,速度场的求解效率也得到极大的提高从而优化的效果和效率都有明显提高。
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So the effect and the efficiency of the shape optimization are guaranteed. If using sensitivity analysis which is based on the calculus of variations in the shape optimization, the sensitivity analysis can be a relatively independent module. The efficiency of computing the design velocity field and the quality of mesh will be improved by using Herrmann method.
在形状优化过程中,采用基于变分法的敏度分析,可以使敏度分析成为单独模块,在进行设计速度场求解时采用Herrmann法,使速度场求解的效率和优化过程的质量得到保证。
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The Computation Fluid Dynamics solute a group of differential coefficient equation on mass,energy,momentum,user-defined scalar quantity by numerical value method ,and the solution can predict the detail of the flowing process.It have been the tool to optimize the process set or magnify the fix quantity design .
计算流体力学的原理是用数值方法求解非线性联立的质量、能量、动量和自定义的标量的微分方程组,求解结果能预报流动过程的细节,并成为过程装置优化和放大定量设计的有力工具。
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In specific applications expression : in compressed natural language describes various examples of the basic algorithm, using MATLAB as a programming language, a series of the combined limit, the bonus points will be combined, one graphics area and the length of the horizontal curve equations, and curve tangent process, the rotary body size and shape combined several process issues.
在具体应用中的体现:以简练的自然语言描述了各实例的基本算法,运用MATLAB作为编程语言,实现了数列极限的求解、定积分的求解、平面图形面积及平面曲线长度的求解、求曲线切线的过程、旋转体体积的求解及其形成过程等几个问题。
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Firstly, several kinds of schemes were proposed according to the design demand. The best scheme was chosen after analyzing and comparing the schemes. The robot's structure was designed with Pro/Engineer and AutoCAD software. Secondly, the kinematics analysis conducted, coordinate transformation matrix using D-H method was set up, and the kinematics equation direct solution and inverse solution was deduced. The manipulative interface about the kinematics equation direct solution and inverse solution was completed with VC++ and the velocity Jacobian of displacement matrix was constructed using differential transform method. In the process of the trajectory planning based on robot's kinematics analysis, I propone a method by which we can get middle nodal point with normalizing factor in order to simplify our searching for these middle nodal points. In addition, I give these middle nodal points with actual physics signification. For eliminating contradiction between real-time and accuracy, I bring forward separately limit of error and reversal interpolation method. For decreasing calculation quantity, we resort to tri-spline interpolation in the articulation space.We analyse the work range of the robot by resorting to graphic means.
首先,作者针对机器人的设计要求提出了多个方案,对其进行分析比较后,选择其中最优的方案后用Pro/Engineer和AutoCAD软件进行了机器人模型结构设计;其次,进行了运动学分析,用D-H方法建立了坐标变换矩阵,推算了运动方程的正、逆解,运用VC++制作了正、逆运动学求解的求解界面;并且用微分变换法推导了速度雅可比矩阵;在基于机器人的运动学的轨迹规划中,通过在操作空间的规划,提出了归一化因子来求解中间结点,通过它可以使求解中间结点变得更简单,并且赋予这些中间结点实际的物理含义,对于规划中精确性和实时性的矛盾,提出了以误差极限法和反向插值法来解决的方法;为了减少规划过程中计算量,在关节空间进行三次样条插值;然后借助图解法进行工作空间分析,作出了实际工作空间的轴剖图。
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Based on the properties of miniature PSA oxygen production and a linear driving force approximation, a mathematical model for PSA processes of a Special Miniature Oxygen Concentrator is developed in this paper. The boundary and initial conditions for the model are analyzed and determined, and the finite difference method is applied to solve the partial differential equations.
基于微型变压吸附氧氮分离过程的特点和线性推动力模型,建立了描述该过程的数学模型,给出了求解的边界条件和初始条件,采用有限差分法对模型进行了求解。
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There is mutual contradiction between direction estimation of user's signal and power allocation among all users in the beamforming algorithm. A twice game beamforming algorithm based on game theory is proposed to deal with it. Beamforming game algorithm mathematics model is constructed. During the first game, direction of signal and power allocation are mapped the game theory as "player", which are modeled as the problem of maximin function and obtain direction estimation first. Then during the second game, power allocations of different users are described as a multi-user game. Power updated algorithm is designed. The existence and uniqueness of the Nash equilibrium in the twice game beamforming algorithm based on game theory are proved by mathematics derivation.
摘要针对波束成形算法中,用户的信号方向估计值和用户之间的功率分配存在着相互矛盾,本文提出了一种基于博弈论的二次博弈波束成形算法,构建了波束成形博弈算法数学模型,首先在第一次博弈的时候,将波束成形算法中的信号方向和功率分配映射为博弈论数学模型中的"局中人",将其建模为函数的极大极小值求解问题,先求解出信号方向;然后在第二次博弈的时候,将不同用户的功率分配过程描述为一个多用户的博弈过程,设计了功率分配更新算法,通过数学推导论证了纳什平衡点的存在性和唯一性。
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In general, the major results are:(1) Established the geometrical model for the enwinding of the wire rope in the roller, such as the inclination of the wire rope and the climbing equation of roller in the commutation process;(2) Established the tensile force kinetic model for the enwinding wire rope used the Lagrange kinetic equation and the continual kinetic theory in the start up and retard moment. Solved the equations by the method of modal analysis and separation of variables(3) Based on the analysis on the enwinding mechanism of the wire rope, we did the research on the mechanics behavior of the wire ropes enwinding process.(4) According to the research above, we made the computer program to solve the mechanics models. And after parametric analysis, we made the suggestion for the improving of the current wire rope enwinding system.
主要研究工作有:(1)建立了钢丝绳在滚筒缠绕几何模型,研究了钢丝绳缠绕过程极限偏角及换向过程在滚筒爬坡机理及几何模型;(2)依据LAGRANGE系统广义动力学方程、连续体动力学理论分别建立起升系统启动及制动过程钢丝绳缠绕快绳拉力的动力学模型,并分别采用模态分析法及分离变量法求解;(3)结合对钢丝绳在钻机滚筒缠绕机理分析的基础上,研究了钢丝绳在滚筒缠绕过程力学行为;(4)编制计算机仿真程序对上述模型进行求解,在参数分析的基础上提出对目前钢丝绳缠绕系统结构改进建议。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力