最佳性

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。

Through the introduction of three key related concepts of variability,negotiability and adaptability,we are better equipped to explain the pr...

通过引入变异性、协商性和适应性等三个处于不同层次而又相互联系的关键概念，我们可以更好地阐释隐喻的生成及理解：隐喻的生成是发话人以相似性为原则寻求源域，并从最佳个体关联角度对源域进行适应性评价的过程；隐喻的理解也同样充满了变异、协商和适应，释话人需要在可能的范围内选择具有最佳语境适应性的语义解释。

For finding the best work function of SCC, SCC is requested to have favorable filling performance, rebar clearance passing performance and cohesiveness, and prevented from bleeding and segregation under the premise of assure that SCC"s flowing property due to by dint of rheology theory and analyse mechanism on concrete"s vibrationless moulding and compact.

为了得到自密实高性能混凝土的最佳工作性能，在研究中借助流变学理论，分析研究了混凝土拌合物免振捣成型和密实的机理，在保证自密实混凝土流动性的前提下，要求混凝土具有良好的填充性、钢筋间隙通过性和粘聚性，防止泌水、离析，解决了流动能力与抗离析能力的矛盾。

Water stress is one of the most important abiological stress to maize seedling .In this study, we arm to identify the sensitive stage of maize seedling to water stress and select the material which tolerance to flooding. And we use waterlogging tolerance index to identify the sensitive stage of maize seedling. we have studied 20 inbred lines of maize which seedlings under water stress in three stage. The result show that the three leave stage is the most obvious stage to flood stress. In addition, we have analyzed ten of the inbred lines to re-act the waterlogging tolerance index. The result show good re-action. And the result also show that waterlogging tolerance index is a credible index to select waterlogging tolerance materials in seedling.

涝渍是玉米苗期主要的非生物逆境胁迫之一；本试验通过对20份玉米自交系进行苗期的淹水对照试验，采用了三个处理时期，并利用耐渍系数作为指标进行敏感时期的鉴定，结果表明三叶一心期是淹水的相对最佳时期；同时利用其中10份自交系对耐渍系数的重演性进行了分析，结果表明其重演性很好；同时结果还表明耐渍系数是耐渍性鉴定的一个可靠指标。

ECG is the best way to monitor cardiac inotropism and chronotropism, but it is helpless to estimate dromotropism.

心电分析是心脏变时性和变传导性的最佳监测方法，但不能用来检测心脏的变力性。

For example, electrocardiogram, which is the optimal method for analyzing chronotropism and dromotropism, but it can not be used to measure myocardial inotropism.

例如，目前，心电图检查是心脏变时性和变传导性的最佳监测方法，但不能用来监测心脏的变力性。

With the increase of feeding frequency, the specific growth rate in wet weight for juvenile gibel carp increased significantly, and the apparent digestibility of protein and energy increased significantly while the apparent digestibility of dry matter showed no obvious variation.

随着投喂频率增加，异育银鲫幼鱼的湿重特定生长率显著增加，饲料蛋白质和能量的表观消化率显著性增加，而干物质的表观消化率没有显著性变化；投喂频率对异育银鲫幼鱼的生长分化、存活率没有显著性影响；异育银鲫幼鱼的最佳投喂频率为24m/d

Results: among 69 cases, 15 cases stageⅰ, 40 cases stage ⅱand 14 cases stage ⅲ. mr can display abnormal signal of tuberculous meningitis in each stage, particularlymr enhancement scan, which present obviously miliary nodus in the brain and the thickened leptomeninges. miliary nodus of the brain was located mostly frequently at the junctional area of white and gray matter, and the thickened leptomeninges were mostly at the bottom of the brain.

结果：69例中，ⅰ期15例，ⅱ期40例，ⅲ期14例，磁共振对各期结核性脑膜炎均能显示病变，尤其是mr增强扫描，对脑内粟粒性结节及脑膜炎性病变显示最佳，粟粒性结节常位于皮髓交界区，脑膜炎性病变则以脑底部明显。

Methods:building up properties, solubility and resistance to humidity were used as the judgement criteria, the kinds and ratio of the excipients and preparative process were sieved out.

以成型性、溶解性及抗湿性为评价指标，筛选出处方中辅料的品种、配比及最佳成型工艺。

This article confects plastic gravure printing ink through changing the ingredients of ink, such as resin, pigment and additives, and so on.

本论文通过改变油墨的树脂、颜料以及助剂等组成成分，配制塑料凹印油墨，研究油墨的组成成分对干燥性、附着力等印刷适性的影响，从而筛选出使油墨印刷适性达到最佳的各种成分。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。