优值

The effects of the water dosage, pH value and alkalify mode in the preparation process on the photocatalytic activity of TiO2 were examined, and the optimum preparation conditions were also determined by orthogonal design.

制备过程中的加水量、pH值和加碱方式对TiO2光催化活性有影响，通过正交实验确定了TiO2的最优的制备条件。

A matching graph of class-buck and class-stack is obtained by a simplifying rule to guarantee the correctness of curriculum schedule. Employing the matching graph as the initial solution, Tabu search is introduced, the index of which is the weighted summation of the principle of categoricalness, rationality, and humanization.

在此基础上，引入禁忌搜索算法，以排课的完备性原则、合理性原则和人性化原则的加权和为目标函数，以随机二维权值矩阵生成的匹配偶图为初始解，对二维权值矩阵进行扰动构成搜索邻域，以生成的匹配偶图为禁忌对象，采用全局藐视准则，获得最优的排课方案。

MethodsBy means of orthogonally rotational combination design, microwave extraction mathematical simulation model was concluded by the linear regression analysis.

响应面法是采用多元二次回归方程来拟合因素与响应值之间的函数关系，通过对函数响应面和等高线的分析，能够精确地研究各因子与响应值之间的关系，寻求最优工艺参数，解决多变量问题的一种统计方法［3］。

By usingthe dynamica l programming method, the optima l investment portfolio andconsumption policies for one kind of typica l utility function case areobtained,then we make numerica l simulation for it and get the numerica lsolution.

然后运用动态规划方法，对于一类特殊的效用函数情形，求出了最优投资组合及消费选择的显性解，并进行数值试验，得出了值函数的近似解，最后将值函数的解析解和数值解进行比较，得到了相对误差示意图。

This paper brings forward a approach for textile flaw automatic detection based on optimal Gabor filters. At first the niche genetic algorithm is employed to attain the parameters of the optimal Gabor filters and segmentation threshold based on the feature of the unflawed textile,and then apply the optimal Gabor filter and threshold on the fabric image to achieve the resnlts.

为了对织物缺陷进行快速准确的自动检测，建立了一种基于Gabor滤波器的织物缺陷自动检测方法，即首先根据无缺陷织物的结构特征，应用小生境遗传算法寻找最优的Gabor滤波器参数和分割阈值；然后将待检图像通过滤波和分割来得到检测结果，同时根据响应矩阵的极小值点来计算缺陷的形状特征。

Methods 224 patients with liver biopsy and a positive HBsAg were included in this study. The AUROC of AST、ALT、AST/ALT and APRI were identified by using receiver operating characteristic curves. Sensitivity, specificity, positive and negative predictive values, and Youden Index of APRI at optima cut-off were calculated.

调查224名乙肝表面抗原阳性的乙肝患者，利用ROC曲线分析AST、ALT、AST/ALT和APRI的面积，判断APRI的最优截断点并计算不同标准的灵敏度、特异度、阳性预测值、阴性预测值、Youden指数。

The advan tages and disadvantages of using the normal equations to fit a hyperbola were an alyzed. The hyperbola fitted by SVD was used to express the change of the laser beam's width, and the rules for estimating the goodnessoffit were offered. The fitting precisions of hyperbolas fit with the normal equations and the SVD were compared.

通过分析激光光束质量参数测量中应用正规方程组拟合双曲线的优缺点，给出采用奇异值分解拟合激光光束束宽变化双曲线的拟合优度判断方法，并对比了奇异值分解和正规方程组两种双曲线拟合方法的拟合精度。

The crossover operation in the traditional GA operating is that choose two chromosome cross only at random also you can cross a bit, match and cross partly, cross order and cross cycle etc.

传统GA算法中的交叉操作，是随机选取两个染色体进行单点交叉(也可以多点交叉、部分匹配交叉、顺序交叉和周期交叉等等)，但是不管是采用何种交叉操作，新的子代染色体某一基因位上的值都是由两个父代染色体中相应基因位值经过一定交叉运算(直接交换或经算术运算等)所得到的，采用这种交叉算子操作使群体经过多次迭代后群体中的个体开始出现极大的相似性，因此照此下去就会出现早期收敛现象，使得算法的收敛速度非常慢甚至只能求到问题的局部最优解。

The crossover operation in the traditional GA operating is that choose two chromosome cross only at random also you can cross a bit, match and cross partly, cross order and cross cycle etc.

传统GA算法中的交*操作，是随机选取两个染色体进行单点交*(也可以多点交*、部分匹配交*、顺序交*和周期交*等等)，但是不管是采用何种交*操作，新的子代染色体某一基因位上的值都是由两个父代染色体中相应基因位值经过一定交*运算(直接交换或经算术运算等)所得到的，采用这种交*算子操作使群体经过多次迭代后群体中的个体开始出现极大的相似性，因此照此下去就会出现早期收敛现象，使得算法的收敛速度非常慢甚至只能求到问题的局部最优解。

The iodine sorption value and methylene blue sorption value are over the national high quality standard.

碘吸附值和亚甲基蓝吸附值超过了国家优级品的标准。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。