转换函数

An important thing to note here is that ALL doesn't cause an aggregate function to consider NULL values.

使用All不会使聚集函数在执行时将空值包含在结果集中，只能使用NVL函数间接将空值转换成某个固定值，以使其能被包含在结果集中。

Based on the method of multi-objective fuzzy optimization and the overhead traveling crane design, a mathematical model of fuzzy optimization for main box beam section is established. A fuzzy goal anthology is constructed. The fuzziness of multi-objective function and constraints is defined. The transformation of the fuzzy constraints set to normal constraints set in real number domain is realized by applying optimal level cut set method. The optimal solution and optimal constraint value of sub-objective function in the feasible field are found using the genetic algorithms.

应用多目标模糊优化方法，以工程设计中桥式起重机箱形主梁设计为实例，建立了桥式起重机箱形主梁多目标模糊优化设计的数学模型，构造了模糊目标集，确定了多目标函数的模糊性和约束的模糊性，并应用最优水平截集法实现了模糊约束到实数论域上的集合转换，从而用遗传算法寻求到子目标函数在可行域空间的最优解和约束最优值。

At present, the basic idea of exact approaches to solve the fuzzy linear programming problems is: firstly, they are transformed into parametric programming problems, then an unique exact optimal solution with highest membership degree can be achieved via the simplex method for the crisp linear programming.

目前已有的一些求解模糊线性规划问题一般为精确解法，它的基本思想是：将模糊线性规划问题通过对隶属函数的转换化为精确的参数规划问题，然后利用单纯形方法求解出唯一的极大化隶属函数的最优解。

Moreover, online measurement system can be obtained after a fitting formula about water vapour saturated pressure in the gas pipeline at different temperatures is established by using the function chain neural network, which can greatly simplify the software of measurement of gas flux in the pipeline and quickly and truly realize measurement of gas flux in the pipeline in real time and on line in the design range of flowmeter.

在管道煤气计量系统测量中引入管道煤气相对湿度修正，并采用湿度传感器转换相对湿度信号，利用函数链神经网络对管道煤气工况温度下所对应的水蒸汽饱和压力进行拟合，得到基于函数链神经网络的管道煤气流量计量模型和在线计量系统，从而大大简化管道煤气流量计量软件，在流量计设计范围内实现管道煤气流量实时在线计量。

Its outputs include the sigmoidal function to realize I-V nonlinear transfer and its derivative using the forward differential method.

它不仅产生S型函数，完成非线性I -V转换；还利用前向差分法，产生S型函数的导数。

According to analyzing the characteristic of the logic of "and" and "or" gates, this paper derives a conversion rule between the logic of fault tree and the step function. Using this conversion, we can convert fault tree to step function which is easy to calculate by programming in the computer.

通过对故障树中逻辑"与"门和"或"门的特点进行分析，推导出故障树逻辑关系与阶跃函数之间的转换规则，利用该规则可将故障树转化为便于编程求解的函数表达式。

As you have probably guessed, the unquote* functions do the exact opposite of the quote* functions—they convert all characters encoded

也许和你猜到的一样，unquote*函数与quote*函数的功能安全相反—它将所有编码为"%xx"式的字母都转换成它们的ASCII码值。

On the basis of engine idiocratic mathematical model, using the origin underway accelerate time and the oil consumption at the cycle of multi-working conditions as the objective functions of the power performance and the economy performance respectively, and then transform it to a single objective function by using the linear adding.

在建立发动机特性数学模型的基础上，以原地起步连续换档加速时间和多工况循环使用油耗作为衡量动力性和燃油经济的2个分目标，采用线性加权组合的方法将其转换成单一目标函数，建立了汽车动力传动系优化数学模型，利用惩罚函数法对此模型进行了优化，实例计算表明，应用该方法对汽车动力传动系进行优化匹配分析时，整车综合性能均有显著改善。

Direct volume rendering of scalar fields uses a transfer function to map the measured data to the colors and opacities.

在体绘制中传递函数将体数据转换成光学参数，因此体绘制的效果直接由传递函数决定。

We reconverted the result from int back to a float so that you can visu- alize the results more clearly when compared to the output of the other two functions.

下面的例子用四个正数和四个负数作为这三个函数的参数，将返回结果列在一起做个比较。（为了便于比较，我们将int函数的返回值也转换成了浮点数）。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。