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Answer: It is absolutely effective. However, dietetics is the key factor for a radical cure.

答：绝对有效，但若要根治还需要注意饮食，此乃为病源。

Based on finite difference method and stereolithography file schema, the key techniques of mesh generation in foundry computer aided engineering system have been studied, including the technique for fast generating outlines of cross-section, the technique for handling error tolerance and the technique for rapidly generating mesh from cross-section.

基于有限差分法和标准模板库，研究铸造计算机辅助工程系统中的网格剖分关键技术，具体包括STL实体截面轮廓快速生成、容错处理，以及截面网格信息的快速提取等技术。

Key words: SMS4; differential analysis; differential fault attack; fault model; difference distri bution table

因为实际中故障发生的字节位置是不可能完全平均的，所以实际攻击所需错误密文数将略大于理论值；文中的实验结果也验证了这一事实，恢复SMS4的128bit种子密钥平均大约需要47个错误密文。

In the study, the core conception is exchange; the key point is the efficiency of the exchange,and attention should be paid to the specific character and differentia.

本文认为，营销学是一门研究交换的科学，也是一门不断创新的科学，其核心概念是交换，研究重点是交换的有效性，强调的是个性与差异化。

Key elements of differential equations and linear algebra are introduced early and are consistently referenced, all theorems are proved using elementary methods, and numerous worked-out examples appear throughout.

使用基本的方法，介绍微分方程和线性代数的关键知识，定理证明，并且许多可以解决的例子始终出现。

The differential calculus of the pluralistic function is both the key and difficult point in higher mathematics.

多元函数微分学是高等数学教学的重点和难点之一。

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。

Key words two-dimensional wave equation; parameter inversion; differential evolution algorithm; finite element

利用微分进化算法进行二维波动方程参数反演的研究。

The circuit topology of the differential Forward DC-DC converter mode inverter with high frequency link was proposed. Circuit topology, transient voltage control strategy, steady principle characteristic and design criteria for the key circuit parameters were deeply investigated.

提出差动正激直流变换器型高频环节逆变器电路拓扑，并对该变换器的电路拓扑、瞬时电压控制策略、稳态原理特性、关键电路参数设计准则等进行了深入地分析研究。

The key point of the theme product planning is on how to make product differentiated.

通过分析明确主题产品建设成功的关键在于实现产品的差异化。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48