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Among used machine learning methods, the gradient descent method is widely used to train various classifiers, such as Back-propagation neural network and linear text classifier. However, the gradient descent method is easily trapped into a local minimum and slowly converges. Thus, this study presents a gradient forecasting search method based on prediction methods to enhance the performance of the gradient descent method in order to develop a more efficient and precise machine learning method for Web mining.However, a prediction method with few sample data items and precise forecasting ability is a key issue to the gradient forecasting search method. Applying statistic-based prediction methods to implement GFSM is unsuitable because they require a large number of data items to model a prediction model. In the contrast with statistic-based prediction methods, GM(1,1) grey prediction model does not need a large number of data items to build a prediction model, and it has low computational load. However, the original GM(1,1) grey prediction model uses a mathematical hypothesis and approximation to transform a continuous differential equation into a discrete difference equation in order to model a forecasting model.

其中梯度法是一个最常被使用来实现机器学习的方法之一，然而梯度法具有学习速度慢以及容易陷入局部最佳解的缺点，因此，本研究提出一个梯度预测搜寻法则(gradient forecasting search method， GFSM)来改善传统梯度法的缺点，用来提升一些以梯度学习法则为基础的分类器在资讯探勘上的效率与正确性；而一个所需资料量少、计算复杂度低且精确的预测模型是梯度预测搜寻法能否有效进行最佳解搜寻之关键因素，传统统计为基础之预测方法的缺点是需要较大量的数据进行预测，因此计算复杂度高，灰色预测模型具有建模资料少且计算复杂度低等优点，然而灰色预测理论以连续之微分方程式为基础，并且透过一些数学上的假设与近似，将连续之微分方程式转换成离散之差分方程式来对离散型资料进行建模及预测，这样的作法不尽合理，且缺乏数学理论上的完备性，因为在转换过程中已经造成建模上的误差，且建模过程仅考虑相邻的两个资料点关系，无法正确反应数列未来的变化趋势。

When the increasing of the speed and loading of the freight train, the heat load of the wheel will certainly ...

随着车辆的重载化和高速化，车轮的热负荷进一步增加，对车轮的疲劳寿命带来重大影响。

A 3 kilojoule electrical impulse has the potential to lift several hundred kilograms, so in theory a track with several coils that were pulsed in a equence could lift and carry along a load, such as a train: MagLev technology without superconductors!

例如这样的火车：不用超导体的磁悬浮。

EMD is the global leader of railroad domain all the time, outstanding performance makes EMD engine can answer any environments leisurely, from beauty of north and south the mainland goes to thing Europe each country, arrive from Australia llano the Sahara, arrive from Siberia the Andes, arrive from bright phearl Hong Kong treasure island Taiwan, all howl of heavy-load train of EMD engine tractive has sailed.

EMD一直是铁路领域的全球领导者，卓越的性能使EMD机车能够从容应对任何环境，从南北美大陆到东西欧各国，从澳洲大草原到撒哈拉沙漠，从西伯利亚到安第斯山，从明珠香港到宝岛台湾，均有EMD机车牵引的重载列车呼啸驶过。

The man on the train tried to load me up with stories of his wealth.

火车上的那个男人向我大谈特谈有关他的财富的事情。

It was no light running now, nor record time, but heavy toil each day, with a heavy load behind; for this was the mail train, carrying word from the world to the men who sought gold under the shadow of the Pole.

现在既不再轻装上阵，也不需要刷新记录，可后面拖着沉重的负载，每天都是艰难的苦役。这是辆邮车，载着来自世界各地的信件，送给那些在北极的阴影下寻金的人们。

It means that the athletes live in the plateau or man-made hypoxic surroundings, so as to enhance the organisms hypoxic preadaptation and improve the anti-anoxia ability, while they train in the plain or lower plateau to achieve effective training load.

高住低训训练法就是让运动员居住在高原或人工低氧环境中，增强机体低氧预适应，提高机体抗低氧能力，而训练在平原或较低高原的地方以达到有效训练负荷的一种训练方法。

It means that the athletes live in the plateau or man-made hypoxic surroundings, so as to enhance the organism\'s hypoxic preadaptation and improve the anti-anoxia ability, while they train in the plain or lower plateau to achieve effective training load.

高住低训训练法就是让运动员居住在高原或人工低氧环境中，增强机体低氧预适应，提高机体抗低氧能力，而训练在平原或较低高原的地方以达到有效训练负荷的一种训练方法。

Regarded the rail as a continual Euler-Bernoulli beam in Winkler ground,the train-track-roadbed model is established,with the consideration of pseudo-static load of train and dynamic contact force between wheel and rail.

4视钢轨为Winkler地基上连续的Euler-Bernoulli梁，建立了列车-轨道-路基模型，同时考虑列车荷载的拟静力和轮轨动态接触力。

Initially, assuming that the contact between cam and tappet is"dry contart", a dynamics model of Hertzin contact stiffness and impact damping is established. Next, with dynamic load on cam—tappet pair from the model, an analysis is made both to unsteady EHD oil film in cam—tappet pair under condition of full and partial lubrtication and to wear characteristics of cam profile. then, according to the fact that the lubrication in cam—tappet contact surface is EHD lubrication, taking the interaction between stiffness and damping of unsteady EHD oil film and rigidity of solid object contact into account, a dynamics equation of valve train relating to the dynamic effect of EHD oil film is built up and solved. Consequently, a further study is made on the dynamic characteristics of valve train under interaction of EHD oil film dynamic behavior and the problem of EHD lubrication in cam—tappet pair. Finally, the dynamic effect of full and partial EHD oil film is studied accordingly.

首先，通过对凸轮—挺杆接触为&干接触&的假设，建立了考虑赫兹&接触刚度&和冲击&阻尼&的配气机构动力学模型，用由此求得的凸轮—挺杆表面动载荷对凸轮—挺杆进行了全膜状态和部分膜状态非稳态弹流润滑分析，并研究了凸轮轮廓的磨损规律；然后，是在凸轮挺杆表面存在弹流动压油膜这一事实的基础上，相当于在动力学方程中考虑非稳态弹流油膜的&刚度&、&阻尼&和固体接触&刚度&的耦合作用，建立并求解了考虑弹流润滑行为动力学效应的配气机构的动力学方程，从而深入地研究了弹流润滑行为与动力学行为耦合作用下的配气机构动力学特征以及凸轮挺杆弹流润滑问题；作为前面工作的对应部分，考虑弹流油膜动力学效应的研究工作也同样分为全膜状态和部分膜状态进行。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。