被使用

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。

Second, both occur as a free-standing item and suggest disaffiliation or topic curtailment.

第二、两者都可被使用成为所在话轮的唯一成份，暗示谈话者有意结束进行中的话题。

It may be because the file is in use or you are low on disk space.

可能是此文件正在被使用，或者没有足够的磁盘空间。

For statistical analysis data distribution curve evaluation studies and unpaired two-tailed student's t-test were used.

为统计分析数据发行曲线评估研究和无对手的two-tailed 学生的t 测试被使用了。

They built a lot of bridge and the diversion channel, but some of them still use.

他们建造了许多桥梁和引水渠，而且其中有一些至今仍被使用。

Even though Dojo is made up of many different packages, it's frequently used in very specific ways.

虽然dojo由许多不同的包组成，它经常以一种特定的方式被使用。

Away, down 或 off一起使用: rocks worn away by the sea; shoes worn down at the heels.

被海水冲刷的岩石；跟部磨损的鞋子

We have such experience, when trying to duplicate names to a file name, the system prompts you to this document is being used.

我们都有这样的经历，当试图给一个文件重名名时，系统提示你这个文件正在被使用。

At the end of each day, a layer of soil is scattered on top of it and some mechanism, usually an earth-moving equipment is used to compress the garbage, which now forms a cell.

在□天的结尾，土壤层数驱散在它顶部并且某一机制，设备通常被使用压缩垃圾，现在形成细胞。

Daylight Saving Time was introduced in 1916, during the First World War, to economise on the use of artificial light.

1916年，一战期间，Daylight Saving Time为了节省照明电力而被使用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。