查询词典 number field
- 与 number field 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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Variation laws of electron movement with emergence angle and microwave electromagnetic parameters are also derived. The emergence angle of electron has significant effect on the movement of electron, and there is an emergence angle in which the electron has the maximum trajectory length and impact energy, Impact energy will increase and return time will reduce as increasing the amplitude of electric field, and both parameter would oscillate with the phase of electric field, which can essentially explain that multipactoring electron number oscillates in twice the frequency with the increase of microwave frequency, electron trajectory will change from parabolic-like movement to complex oscillation.
研究发现:电子出射角度对其运动状态有显著影响,电子存在运动轨迹最大的某一出射角度,该角度下电子拥有最大的撞击能量;微波电场幅值的增加将使电子撞击能量增加,返回时间减小,微波电场相位的变化使电子的撞击能量和返回时间呈周期振荡,这从本质上解释了电子数量在二次电子倍增过程中以微波频率两倍周期振荡的原因;随着微波频率的增加电子将由简单的类抛物线运动转变为复杂的振荡运动。
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In a 4700 Assembler Language instruction, a method of addressing a field by specifying the segment number, displacement, and field length in an instruction.
在ibm系统4700汇编语言指令中,通过在指令中指明段号、位移量和字段长度以对某一字段进行编址或寻址的方法。
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Using the directional field information,Poincare index can detect the discontinuous point in the directional field——singularities.According to the number of singularities,their position and structural character of fingerprint's ridge lines,the basic category of fingerprint is classified.
利用指纹图像的方向场信息,用Poincare索引值检测出方向场中不连续的点——奇异点,根据奇异点的数目和相互位置关系以及指纹脊线的结构特征确定指纹的基本类型。
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Based on Wilson\'s lemma on evenly distributed differences, elementary number theory and fundamental theory of finite field, the finite field construction for strict optimal OOCs is proposed and the basic idea of this construction is investigated. The main steps and flow chart of assistance design by computer are obtained.
3基于Wilson均匀分布差引理、初等数论及有限域的基本理论,提出一种严格最佳光正交码的有限域构造法,对该构造法的基本设计思想进行深入的理论分析,得到该构造法计算机辅助设计的主要步骤及流程。
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I hope that the majority of companies the user's help and support in high-tech field, with the vast number of users in the field hand in hand, create brilliance.
我公司希望在广大用户的帮助与支持下在高新科技领域中,与广大用户在领域中携手共进,共创辉煌。
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The results show that the flow-field boundary augments with increase of flight altitude at the same flight Mach number and the same mass flow rate, and augments with the increase of mass flow rate at the same flight. At the same time, the combustion gas injection flow-field structures change greatly with the variety of flight status parameters.
结果表明,在发动机排气质量流率相同的情况下,高空时燃气射流流场的边界比低空大;相同飞行高度时,随着发动机排气质量流率的增加,燃气射流流场边界随之增大,同时射流流场的结构也有很大的不同。
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Both the departure field of the mean atmospheric circula tion in summer in flood years and the correlation field between the summer mean atmospheric circulation in East Asia and the number of summer equivalent torre ntial rain days in the Beijing area possess the main characteristics of the mean circulation pattern for the torrential rain process in North China.
吴广仁等[2 ]根据降水距平场相似程度,给出了我国东部雨带的 4种分布型,并指出西太平洋副高位置对雨带分型有决定性作用,北京夏季降水正常或偏多时,是属于其中的黄淮东型和黄河河套型。
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Magnetic induction intensity's signal which the removable Hall probe head will examine using the monolithic integrated circuit technology demonstrated on the lattice screen, moves the Hall probe head in the magnetic field then the magnetic field distribution rule demonstrates the Helmholtz coil axis on by the curve and the number form obviously.
利用单片机技术将可更换的霍耳探头所检测到的磁感应强度的信号显示到点阵屏上,在磁场中移动霍耳探头即可将亥姆霍兹线圈轴线上磁场分布规律以曲线和数显的形式显示出来。
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Height of the field, in number of rows default to 1 for all field except
高度的领域,行数
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。