查询词典 difference equation

In Chapter 3, the prior estimates about the 3-D difference solution and its difference quotients on time space and geometry space are made by means of discrete functional analysis, so that the stability and the convergence of the 3-D difference solution are obtained.

在第三章中，运用离散泛函分析的手段，对三维中子输运方程的差分解及其时间、空间差商进行了先验估计，从而得到了差分解的稳定性和收敛性，也为三维问题的应用研究打下了初步的理论基础。

objective to study the relationships between smoking,atherosclerosis and c-reactive protein.methods to detect the serum crp and serum lipid while in quiring the smoking status for278patients with cardio-vascular disease.then analyed the crp level among different groups.results crp level had significant difference between smoking and non-smoking groups,atherosclerosis and non-atherosclerosis groups;but it seems no relationˉship with high lipid.in differentsmoking amount groups,crp level had significant difference in atherosclerosis paˉtients,but no significant difference in non-atherosclerosis patients.conclusion smoking,high lipid and crp were all very good prognostic mark in atherogenesis.crp was a significant prognostic mark in atherosclerosis influenced by smoking.

目的 初步探讨c反应蛋白crp与吸烟和动脉粥样硬化三者之间的关系。方法通过对临床278例动脉粥样硬化和非动脉粥样硬化病人血清crp和血脂的检测及吸烟情况的调查，应用spss统计软件进行差异分析，比较不同组间crp水平。结果 crp在吸烟与不吸烟组、动脉粥样硬化和非动脉粥样硬化组差异有显著性。而在血脂正常组和高血脂组差异无显著性。在不同吸烟量组间：非动脉粥样硬化组间crp水平差异无显著性，而动脉粥样硬化组差异有极显著性。结论吸烟、血脂升高、crp升高是动脉粥样硬化较好的预示指标；在吸烟人群中crp升高者更易患动脉粥样硬化。

The results were as follows. In the insert mutation genotypes, there was significant difference between body weights of 2 weeks aged BB and AB genotype (P.05), while there was no significant difference between AA and other genotypes. In the mutation genotypes, there was no significant difference in body weight. Insert mutation loci had no significant effect on fossil bone length and shank length of 0-12 weeks aged chickens, only mutation loci had a significant effect on fossil bone length and shank length of 6 weeks aged chickens.

分析多态位点与0-12周龄鸡生长发育性状的关联性，结果表明：插入突变基因型中，2周龄鸡体重BB型与AB型差异显著(P.05)，但AA型与AB型和BB型差异均不显著，而突变各基因型间没有显著差异；插入突变位点对0-12周龄鸡的龙骨长、胫骨长均没有显著影响，而突变位点仅在鸡6周龄时表现出与龙骨长、胫骨长间的差异显著性。

Through the difference 显著性comparison, from Dan jade 6 to rich friend 1, along with the agechange, a change tends to more and more optimizes; Besides grainthick, during the ear of character change difference has all achievedthe extremely remarkable level; An ear of number of lines, hundredgrains heavy, the ear long, the ear thick and so on the main ear ofcharacter change difference is remarkable, and all approaches alongwith the age assumes the obvious trend of escalation.

通过差异显著性比较，从丹玉6号到富友1号，随着年代变化，株型的变化趋向于越来越优化；除了粒厚以外，穗部性状间的变化差异都达到了极显著水平；穗行数、百粒重、穗长、穗粗等主要穗部性状变化差异显著，并都随年代的靠近呈明显上升趋势。

We present a simple new algorithm for the inverse Laplace transform. The applications of this new algorithm to the signal processing, the Fuoss-Kirkwood formulas for relaxation spectra, the Abel integral equation, the Fermi and Bose integral equation are also given.

提出了处理Laplace逆变换的一种简单的新算法，以及这种新算法在信号处理、Fuoss-Kirkwood弛豫谱方程、Abel积分方程、Fermi型和Bose型积分方程等方面的应用。

Based on the sliding response theory of the free-standing equipment, the differential equation of motion of the free-standing equipment under seismic excitations is presented. The equation is solved by Runge-Kutta algorithm, therefore the absolute acceleration, relative velocity and relative displacement of the equipment can be obtained. The sequential coulomb friction model is applied to the analysis.

以前人研究建立的浮放设备滑移反应分析理论为基础，给出了浮放设备在水平和竖向地震输入下滑移反应运动微分方程，选取连续型的库仑摩擦力模型，采用Runge-Kutta法求解浮放设备地震滑移反应运动微分方程，可以得到浮放设备在地震作用下的绝对加速度、相对速度和相对位移反应时程。

Based on the Volume of Fluid Method, the wave damping absorber of the numerical wave flume for irregular waves has been investigated. Setting the Turbulence motion equation and the Renault equation as the governing equations and using the wall function technique in the near-wall region, an absorbing wave-maker is set at the left side of the flume.

本文对基于VOF方法的不规则波数值波浪水槽进行了阻尼消波研究，以湍流运动方程一雷诺方程为控制方程，在近壁区应用壁函数技术，在数值波浪水槽的左端设置了主动吸收式造波机。

Two different deductions of equation for the pH calculation of buffer solutions are compared,and a new deduction method based on proton balance equation in acid-base equilibrium is proposed.

比较了两种缓冲溶液 p H值计算公式的推导方法，从酸碱平衡的 PBE出发，提出一种新的推导方法。

Studies show that the acoustic wave equation can be derived from Its evolution equation at the macroscopic limit.

研究表明，这样一种离散粒子系统中的统计平均量随时间的变化具有波动规律。

The Steady-state model is based on the PENG-ROB equation, that is, the material balance equations, Phase equilibrium equations, component additivity and the enthalpy balance equation.

稳态模型建立的基础是 PENG-ROB 方程，即物料平衡方程、相平衡方程、组分加和方程和焓平衡方程。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。