查询词典 initial data

There is the Cauchy problem of hyperbolic system with weak damping in Chapter4. In the space of dimension N=1,3, exploiting the semigroup method, the global existence and the decay behavior of the solution with small initial data to problem (about problem with small initial data) is put forward.

当空间维数N=1，3和初值充分小时，利用半群理论得到问题整体解的存在性，并对于整体解给出一致衰减估计；当空间维数N=1 时，利用试验函数方法讨论解在有限时刻爆破的条件。

Initial data : Initial data are needed for the application to work.

初始化数据：是应用程序正常运行所必须的数据。

According to the method, an initial classification was firstly performed by use of the conventional transitive closure method, and then an initial division matrix was constructed. With the weighted fuzzy ISODATA method for iterative computation of the related data, the data were classified effectively.

该方法首先利用传统的传递闭包方法得到1个初始分类，并在此基础上提出初始分划矩阵，根据考虑权重因子的模糊ISODATA方法对相关数据进行迭代计算，从而对数据进行有效分类。

Then we prove that if the initial data enter into the unstable set, then the solution of the aforementioned Cauchy problem blows up in finite time, and if the initial data enter into the stable set, then the solution of the aforementioned Cauchy problem globally exists.

其次证明了如果初值进入不稳定集，该柯西问题的解在有限时间内爆破；如果初值进入稳定集，该柯西问题的整体解存在。

A series of simplified mathematics models for analyzing the precision of the firing initial data and assessing the firing efficiency under the condition of computer are established to the accompaniment of software application which could be used in the determination of firing initial data, real-time precision analyzing and aided decision making.

建立了计算机条件下射击开始诸元精度分析和射击效率评定的一系列简化数学模型。建立了决定火炮射击开始诸元、实时精度分析和辅助决策的应用软件。

It includes as follows:(1) That the right acceptance probability to decide the initial value temperature should be 0.6 are presented by experiment. For the first time, crossover and mutation operator are used in populations to calculate the initial value of temperature. At least the initial value of temperature is 〓.(2) Replacing random change operator with crossover and mutation operators.

2使用遗传算法中交配与突变代替模拟退火算法中随机扰动操作，对两种操作方法进行定性分析，得到突变和交配操作与随机扰动方法在本质上的一致性；同时首次提出在不同温度条件下，使用不同的比例因子，控制参与交配与突变的基因位数，实现了二次使用模拟退火算法的过程。

Under the conditions of stir speeds 400 r·min~(-1) and distance between anode and cathode 1 mm, by using the orthogonal design, the optimum technological conditions were found that the current density was 0.3 A·cm~(-2), initial NaOH concentration in catholyte was 50 g·L~(-1), reaction times of two steps were all theoretical electrochemical reaction times. In the first electrosynthesis, initial Na_2CrO_4 concentration in anolyte was 650 g·L~(-1), and reaction temperature was 80℃. In the second electrosynthesis, initial Na_2Cr_2O_7 concentration in anolyte was 700 g·L~(-1), and reaction temperature was 85℃.

324全氟磺酸增强复合阳离子交换膜、阴阳极液中搅拌速度均为400r·min~(-1)条件下，通过正交实验得到优化工艺条件为：电流密度0.3A·cm~(-2)，阴极液氢氧化钠初始浓度50g·L~(-1)，两步反应时间均为理论电催化反应时间，第一步阳极液铬酸钠初始浓度650g·L~(-1)，反应温度80℃，第二步阳极液重铬酸钠初始浓度700g·L~(-1)，反应温度85℃。

To reduce the sensitivity of conjugate initial values, the initial values of control variables are used to replace the initial values of conjugate variables based on the transformation between conjugation variables and control variables.

为了降低共轭变量初值选取的敏感性，引入共轭变量与控制变量之间的变换，用控制变量初值代替了共轭变量初值。

Based on the theory of large eddy simulation and the method of VOF , the initial breakup process of fuel liquid jet, which eject from the nozzle exit at the time scale of micro-second level, is investigated. The mechanism of primary atomization is analyzed, and the initial breakup model of liquid jet is presented. By modeling and numerical simulation of atomization for a diesel nozzle under the given conditions, the initial umbrella-like spray shapes are obtained, which fits better with the experimental results. Meanwhile, the droplets secondary breakup process, such as leeward RT breakup, dumbbell-like breakup and droplets coalescence, etc. are exhibited visually.

基于大涡模拟LES理论和VOF方法，考察了燃油喷雾初始时刻即时间尺度为微秒级的液柱破碎过程，分析了初始破碎的机理，给出了该时间尺度下液柱初始破碎过程的模型；通过对一特定条件下的柴油机喷油器的建模和喷雾过程的大涡数值模拟，获得了液柱初始时刻"伞状头部"的喷雾形态，所得计算结果与相应的试验数据符合较好；数值模拟还直观地展现了液滴背风RT破碎、哑铃型破碎以及液滴的聚集融合等液滴的二次雾化过程。

Select steam initial temperature from 535℃to 660℃, and initial pressure form16 MPa to 34 MPa, We choose 494 sets of different steam properties in the selected sphere. Making the 494 sets of parameters basing points, We program and analyze how ideal cycle efficiency and relative cycle efficiency and absolute cycle efficiency vary with steam initial properties .

选定蒸汽初温从535℃到660℃，蒸汽初压从16MPa到34MPa范围内的494组不同的蒸汽初参数组，以这些初参数组为基点，编制程序，研究分析了机组理想循环热效率，汽轮机相对内效率，绝对内效率随初参数变化的规律。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。