查询词典 initial approximation

The results show:(1) that the dynamical properties in the system depend on the degree of entanglement of the initial two identical two-level entangled atoms and the intensity of the coherent optical field, and the atomic dipole moment can be completely squeezed via choosing optimal degree of entanglement of the initial atoms in the feeblish optical field;(2) that the quantum properties of the system also depend on the degree of entanglement of the initial two identical two-level entangled atoms and the intensity of the coherent optical field, and the radiation field can be effectively squeezed via choosing optimal degree of entanglement of the initial atoms in the feeblish optical field.

结果表明：(1)相干态光场的强度和两原子的初始纠缠度对原子的动力学行为有很大的影响。原子布居的振荡频率及幅度和原子偶极压缩的演化规律与光场强弱和两原子初始纠缠度相关联。在弱光场下，选择合适的两原子初始纠缠态，原子偶极矩可以完全被压缩。(2)相干态光场的强度和两原子的初始纠缠度对光场的量子特性也有很大的影响。光场的二阶相干性质和光场的压缩效应均与光场强度和两原子纠缠度相关联。在弱光场中，选择合适的两原子初始纠缠度，光场压缩深度和时间可达到最大。

When initial NO3--N was leached, the correlation coefficients between soil initial NO3--N and mineral N extracted by CaCl2 before aerobic incubation with raygrass nitrogen uptake were decreased to 0.613 and 0.607, respectively, and both reached 5% significantly level. However, the correlation coefficients between mineralizable N extracted by aerobic incubation, soil initial mineral N and mineralizable N extracted by aerobic incubation, N0 and soil initial mineral N and N0 with raygrass nitrogen uptake were raised obviously, and all reached 5% and 1% significant level.

以不包括土壤起始NO3--N盆栽试验植物吸氮量为参比，通气培养前CaCl2淋洗起始NO3--N和起始矿质氮与五期黑麦草地上部氮素累积量间的相关性尽管有所降低，但相关性仍达5%显著水平，相关系数分别为0.613和0.607；而通气培养30周矿化氮素、土壤起始矿质氮+通气培养30周矿化氮素、N0及N0+起始矿质氮与五期黑麦草地上部吸氮量的相关系数却明显提高，相关系数分别为0.718，0.782，0.688 和0.640，均达5%或1%显著水平。

A it is predominantly derived from the initial variety or from a variety which itself was predominantly derived from the initial variety, while retaining the expression of essential characteristics that result from the genotype or combination of genotypes of the initial variety; an essentially derived variety may have been obtained by the selection of a natural or induced mutant or of a somaclonal variant, by the selection of a variant individual from plants of the initial variety, by backcrossing, by a transformation by genetic engineering, or by any other similar method

一个品种主要由原始品种演化而来，或主要由原始品种的实质性派生品种演化而来，同时保留了来自原始品种基因型或基因型组合的基本特征的表达；一个实质性派生品种可能通过选择自然变异或诱变或体细胞无性变异、原始品种植株的个体变异的选择、回交、基因工程的改造或任何其它类似方法而获得。

A method of processing a series of input audio signals representing a series of virtual audio sound sources placed at predetermined positions around a listener to produce a reduced set of audio output signals for playback over speaker devices placed around a listener, the method comprising the steps of: for each of the input audio signals and for each of the audio output signals: convolving the input audio signals with an initial head portion of a corresponding impulse response mapping substantially the initial sound and early reflections for an impulse response of a corresponding virtual audio source to a corresponding speaker device so as to form a series of initial responses; for each of the input audio signals and for each of the audio output signals: forming a combined mix from the audio input signals; and forming a combined convolution tail from the tails of the corresponding impulse responses; convolving the combined mix with the combined convolution tail to form a combined tail response;for each of the audio output signals: combining a corresponding series of initial responses and a corresponding combined tail response to form the audio output signal.

提供了一种处理一系列输入音频信号的方法，所述输入音频信号代表放置在收听者周围预定位置的一系列虚拟的音频声源，该方法可以产生一组精简的用于在收听者周围的扬声器装置上进行播放的音频输出信号，该方法包括以下步骤：对每个输入音频信号和每个输出音频信号进行以下步骤：用相应的脉冲响应最初的头部对输入音频信号进行卷积以形成一系列初始响应，其中的脉冲响应充分映射了相应的虚拟声源到相应的扬声器装置的脉冲响应的初始声音和早期反射；对每个输入音频信号和每个输出音频信号进行以下步骤：形成音频输入信号的混音；并根据对应脉冲响应的多个尾部形成复合的卷积尾；用复合的卷积尾对音频信号的混音进行卷积以形成复合尾部响应；对每个音频输入信号进行以下步骤：把相应系列的初始响应与相应的复合尾部响应进行复合以形成音频输出信号。

In this thesis, several optimization design problem in mechanical engineering are solved based on the best uniform approximation theory, and some initial work in the basic theory of the best uniform approximation is done.

本文应用最佳一致逼近理论，解决了机械工程中一些优化设计问题，并在最佳一致逼近问题的基础理论方面做了一些开创性的工作。

First the approximation problems are obtained by approximation to the initial datum.

第三部分研究基本半导体方程混合初边值问题解的整体性质。

The effects of the initial values and the network approximation error using neural network model composed of feedforward neural net and delayed output feedback in the approximation of NARMAX system are studied, and a conclusion is drawn that under some weak conditions the output of the network model has little difference from that of the actual system.

研究了用带有延迟环节的前馈网组成的网络模型逼近NARMAX系统时网络逼近误差及运行初始误差对网络模型输出的影响，指出在一些弱的条件下网络模型输出与实际系统输出间相差不大。

The difference schema of the initial boundary value problem was converted to the step-by-step form,which was similar to the difference schema of the initial value problem.It is concluded that the difference schema satisfying the Von Neumann condition is a stable schema,and that,under the consistency condition,such stable schema is convergent.Moreover,with error estimate expression for the difference approximation to the classical solution,the linearity condition is unnecessary.

引入反投影算子将发展方程初边值问题的差分格式转化为与初值问题差分格式类似的逐步推进的形式，从而得出：满足Von Neumann条件的差分格式是稳定的格式；在相容条件下，差分格式若稳定(或满足VonNeumann条件)则格式收敛，且对古典解的差分逼近有误差估计式，不再需要线性的条件。

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℃。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。