查询词典 variations equation

One way is to regard them as the random variables submit to a certain distribution; another is to take them as a random process—— we derive random variables form any of its function's time development, and, the diffusion equation could be partially approached by a equation which is similar to the Ito stochastic integral equation so that the Ito stochastic integral equation is inter-related with the diffusion equation. Therefore, this process could basically reflect the uncertainty in different models.

PSFEM法是假定基本随机变量在均值点处产生微小摄动，利用Taylor级数把随机变量表示为确定部分和由摄动引起的随机部分，从而将有限元控制方程转化为一组线性的递推方程，求解得出位移的统计特性，进而求出应力的统计特性。

The non-isothermal kinetic data were analyzed with the Achar equation, Coats-Redfern equation, Kissinger equation, Flynn-Wall-Ozawa equation and Starink equation.The mechanism function and kinetic parameters of the thermal decomposition in the third step were obtained.The chemical reaction mechanism (F3) controlled the third thermal decomposition process.The apparent activation energy and the pre-exponential factor were 351 kJ·mol-1 and 2.57×10 30s-1 respectively.

采用Achar方程、Coats-Redfern方程、Kissinger方程、Flynn-Wall-Ozawa方程和Starink方程对非等温动力学数据进行了分析，得到了第3步热分解反应的机理函数、动力学参数和热分解反应动力学方程，其热分解反应过程受F3机理控制，表观活化能为351 kJ·mol-1，指前因子为2.57×

First the three-dimensional Hailmuhz equation of magnetotelluric field is split into two 2D equations which could be changed into 1D equation by Fourier transformation method. The two zootomic coefficients of the equation are found out by the derivation of vertical component of electromagnetic field being sufficient the equation and the boundary condition. The resolution of 1D equation can be confirmed.

首先将大地电磁场满足的三维亥姆霍兹方程降维分裂成两个二维响应方程，然后对每一个二维方程进行傅里叶变换，使二维方程变为一维方程，通过大地电磁场垂向方向的导数在地面上所满足的边界条件，确定外推方程中的两个待定系数，从而得到一维外推方程的解。

In modern physics research, the calculus of variations has a broad application of law. As a solid mechanics, structural mechanics and computational mechanics of the theoretical foundation, it has important value in theory and practice on the mechanics; Variation method ruled out the perturbation of the restrictions can be widely used in many state-level and the state function in the calculation in the optical; Calculus of variations can be calculated with the parameters, we can guarantee the reliability of the results, can effectively reduce the workload of calculation, It can be said that the applications of calculus of variations are very broad.

在现代的物理学研究中，变分法有着广泛的应用：在力学上，变分法作为固体力学、结构力学及计算力学的理论基础，在理论上和实践上都有重要的价值；在光学上，变分法排除了微扰法的限制，可以广泛应用于诸多定态能级和态函数的计算中；在量子力学的应用中，具有可算出系统的参数，既可以保证计算结果的可靠性，又能有效地减少计算的工作量等的优点，可以说变分法的应用领域十分广阔。

According to the characteristics that Trypanosome can produce different variations, 5 New Zealand rabbits were infected in sequence with a monoclonal strain of Trypanosome evansi isolated from Yunnan buffalo. 50 monoclonal strains were isolated and showed by indirect immune fluorescent test that the first parasitemia peak of variation in following 4 rabbits exist in 9 predominant variations of first rabbit. The 50 variations subordinate to 20 antigen types.

根据锥虫在兔体内可产生不同变异体的特性，将伊氏锥虫云南水牛单克隆株顺序感染五只新西兰大白兔，分离到 50 个单克隆群体，经间接免疫荧光实验证明：后四只兔子出现第一次虫血症高峰的变异体，均包含在第一只兔体内分离得到的 9个优势变异体之内；这 50 个变异体分属于 20 个抗原型，即共分离到 20 个优势变异体。

The results show that the variations of summer temperature and precipitation in Chongqing contain obvious staggered features. The variations of precipitation are more complex than that of temperature. Three\|year period\|oscillation of mean temperature variations is the strongest,...

结果表明，重庆市夏季气温及降水变化具有明显的阶段性，且降水变化较气温更复杂；重庆市夏季平均气温变化以3年周期振动最强，而降水变化则以10年周期振动最强。

The temporal and spatial distribution of SMP in tomato root zone and the correlation between tomato evaportranspiration and SMP variations were analyzed. The results showed that the variation of SMP among the soil profiles of 0, 15 and 30 cm from drip tape was insignificant, and the horizontal distance of tensiometers to drip tape had little effect on the correlation between tomato ETa and SMP variations. Lateral depths significantly influenced SMP from 20 to 70 cm soil layer and there were obvious effects of tensiometer depth on the correlation between tomato ETa and SMP variations.

对番茄根区土壤基质势时空分布和番茄耗水量与土壤基质势变化的相关性分析表明，水平距毛管0、15和30 cm 3个剖面间土壤基质势差异较小，负压计距毛管的水平距离对耗水量与土壤基质势变化的相关程度影响不大；毛管埋深对20～70 cm土层土壤基质势影响显著，负压计埋置深度对耗水量与土壤基质势变化的相关性影响显著，应依据毛管埋深确定负压计适宜埋置深度。

This article discusses the three tremendous cultural variations in Xiyu,analyses the main causes led to the variations and their substance,and argues that the substance of Xiyu culture's variations was the triumph of the Turki and Islamic culture ,the advanced culture keeping forging ahead and based on advanced economy,over the Yilan culture of weak quality, short of a subject ethnic consciousness and being reduced to a declining state;it was also the defeat met with by the Greek, Persi...

本文探讨了西域经历的三大文化巨变，剖析了其主要原因及实质，认为西域文化变异的实质，是以先进经济为基础的进取型先进文化———突厥文化和伊斯兰文化战胜了缺乏主体民族意识、处于沦落状态的伊兰弱质文化，也是具有悠久古文明传统的希腊、波斯、汉文化在西域文化经营的失败。文章最后揭示出一般不被人重视的文化与边疆稳定、文化兴衰与民族命运这类重大问题的关系，对结合现实与历史教训研究中华文化，特别是对建设中华边疆文化的内容与方针等问题提出了对策建议。

Well, the incidences of vessel and nerve related variations are higher in ancient Northern Asian group, but the frequency of hypostatic variations and hyperostotic variations made the major contributions to differentiate populations.

北亚谱系古代组中那些与血管和神经相关的变异的出现率都很高，而与骨化不全相关的性状出现率比较低。

Results showed diural variations of leaf Pn displayed bipeaked curve model, indicating the depression of photosynthesis at noon. Leaf Pn rate in June was higher than in September; Compared to leaf Pn, Cs had a similar changing curve, Cs in June was higher than in September. While diural variations of intercellular CO2 concentration were opposite to that of leaf Pn and Cs, decreased before 1200,increased after 1200, decreased again at 1600,after 1600 increased again; diural variations of climatic factors displayed single peaked curve model, peakedvalue occurred at 1400,and their influences on physiological factors were indirected and integrated.

结果表明，光合速率的日变化具有双峰型，存在光合午休现象，6月的光合速率高于9月；沙棘的气孔导度较低，其日变化与光合速率有相似的变化趋势，6月的气孔导度大于9月；细胞间CO2浓度的日变化与光合速率和气孔导度的日变化相反，1200之前下降，之后上升，1600下降，然后上升；气象因子的日变化具有单峰型，峰值1400出现，对生理因子的影响是间接且综合的。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。