查询词典 prediction

Practicability of Surface Evolver in evolving prediction of SMT solder joint is reviewed and validated. Chapter five: finite element analysis method based on minimal energy principle with application of Surface Evolver is firstly used in evolving prediction of the kind of BGA solder joint shape.

基于最小能量原理的有限元数值分析方法与边界值积分数学分析方法相比，能更有效地求解各类SMT焊点三维形态成形预测问题，并具有很好的热应力分析延续性和良好的分析精度。

In this paper the structure principle of GM(1, 1) was analyzed and the defect was pointed out that the traditional model only adapt to the data with exponential law, and only can fit for the monotonic data. The prediction is defected when there are two consecutive data unchanged, and 'a' is equal to 0.5 in prediction formula.

从传统GM(1，1)预测模型构造原理出发分析其存在的理论缺陷，此模型适用于具有较强指数规律的序列，只能描述单调变化过程，而且预测数据序列中出现连续两个相等值时将使得a等于0，会使预测数列发散致使预测失效。

Second order incident boundary condition on fixed incident boundary is derived for numerical simulations, based on the cnoidal or sinusoidal motions of wave maker paddle, which shows that the prediction with second order incident boundary condition is more accurate than the prediction with first order incident boundary condition. 2 The analytical solution for higher-order Boussinesq equations is derived and its applicable range is discussed. 3 A 2-D fully non-linear numerical model using boundary element method is developed to obtain wave forces acting on rectangular obstacle. 4 The three-dimensional fully non-linear waves are studied in a numerical wave tank using finite element method.The studies on the coupled numerical model combined Boussinesq equations with Laplace equation are following.

非耦合非线性波浪计算模型：1 根据造波板做椭圆余弦运动或正弦运动速度，推导出数值模拟波浪水槽时固定入射边界上的二阶波浪入射边界条件，数值计算结果和实验结果的对比表明采用二阶入射边界条件对波面升高的预报比采用一阶入射边界条件对波面升高的预报更为精确；2 推导了波浪水槽造波板做正弦运动所产生波浪的高阶Boussinesq方程摄动展开解析解，讨论了该解析解的适用范围；3 对整个波浪水槽应用边界元方法数值模拟了波浪对物体的非线性作用；4 用有限元法求解三维Laplace方程模拟了三维完全非线性波浪水槽。

Based on actual working, the application results and knowledge of robust statistics has been provided in the mining subsidence prediction,the geological mining condition evaluation and the product targets prediction,the space estimation and the mineral geometrization .

认为矿山开采是一个复杂的动态过程，获取的数据分布往往较复杂且质量较差，稳健统计学具有广阔的应用前景。

The results show that the prediction of secondary structure of the membrane protein is consist with the experiment data, as it dose with the prediction of globular protein.

本文利用已建立的模式识别方法预测了三个典型的膜蛋白RC，BR和RH的二级结构，预测结果与实验资料的符合率与该方法用于球蛋白时的结果相仿，是成功的。

Recently, bas ed on Spitz's work, Porsani(1999) presented a half-step prediction filtering te chnique which simplified the two original prolix complex linear equation systems for calculating coefficients of prediction filter as a more simplex one so as t o reduce computational cost greatly.

最近，在Spitz工作的基础上， Porsani(1999年)提出了一种半步长预测滤波技术，它可以将原来用于求解预测滤波器系数的两组复杂的复线性系统方程简化为一组更为简单的复线性系统方程，从而大大降低了运算工作量。

The numerical tide prediction in hydrography is investigated and the Prediction and Application System of Tides in Hydrography is developed.

研究了应用于海道测量的潮汐数值预报方法，研制了海道测量潮汐计算与应用软件系统，介绍了该系统的组成与主要功能以及有关数学模型的建立与计算方法。

Identification and topology prediction of membrane proteins are significant in helping function annotation, function analysis and three-dimensional structure prediction, and guiding the protein research.

跨膜蛋白的识别和拓扑预测有助于基因组的功能注释、功能分析、蛋白的三维结构预测及指导蛋白的研究，具有重要意义。

There are four main topics in this paper:(1) improvement of BP networks algorithm;(2) improvement of BP networks structure, and applying the improved BP networks to the prediction of the time series with certain increasing or decreasing tendency;(3) using the BP networks to diagnose the vibration faults of steam turbines;(4) prediction on the cleanliness rate of steam condenser and the fuzzy diagnosis for condenser based on BP networks.

本文主要研究了四个问题：(1)完善和改进了BP网络的训练算法；(2)BP网络结构的改进研究，并将其应用于汽轮机故障这类有确定性递增趋势的时间序列的预测中；(3)BP网络应用于汽轮机的振动故障诊断研究；(4)基于BP网络的凝汽器清洁率的预测方法及模糊诊断研究。

From the angle of engineering application, this article analysed the corrosion characteristics and damage causes of the current structural used concrete in the region of Hangzhou gulf, on the basis of on-site survey of all the Marine concrete projects in that area. Taking HPC used in Marine as research objective, this article put great emphasis on the influence of the composition cementing material system to concrete performance, and make a preliminary probe into the action mechanism of the composite effects of various mineral materials in improving the performance of concrete by laser measuring size machine and EMPA. Through experiments, the article discussed how chloride ingression in concrete will be effected by such factors as exposure time, chloride binding, environment temperature, stress and cracks conditions; and also analysed the symptoms of these factors in the model of concrete service life prediction by conference to all related research reports both home and aboard. On the foundation of abovementioned research, this paper brought up an engineering model of service life prediction of marine concrete, which is based on chloride-induced corrosion.

本文从工程应用的角度，在对杭州湾地区既有海工混凝土工程作实地调研的基础上，研究分析杭州湾地区既有海工混凝土结构的腐蚀特点和破坏原因；以海工高性能混凝土为研究对象，着重研究复合胶凝材料体系对混凝土性能的影响，并应用激光粒度仪、EMPA等分析手段，就复合胶凝材料的作用机理进行初步探讨；试验研究混凝土暴露时间、胶凝材料对氯离子的吸附、环境温度、应力和裂缝状态等因素对混凝土中氯离子迁移运动的影响，并结合国内外相关研究报导，探讨这些因素在混凝土使用寿命预测模型中的表征；在上述研究基础上，提出以氯离子侵蚀为基础的海工混凝土使用寿命预测的工程应用模型。

The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.

该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性，而切还赋予它以新的意义。

If he thought that he could buy me off, he would be wrong.

如果他认为他可以收买我，那他就大错特错了。