次数

By using the techniques of an explicit criterion to determine the number of real roots of a univariate polynomial in ( [13] , [73] ); B-net form of bivariate splines function; discriminant sequence of polynomial (cf. [13] , [73] ) and the number of sign changes in the sequence of coefficients of the highest degree terms of sturm sequence, this paper determines the number of real intersection points two piecewise algebraic curves whose common points are finite.

3：利用杨路，张景中，侯晓荣在文献（[13]，[73]）中关于一元多项式实根的显式判准，以及二元样条函数的B-网形式，多项式的判别序列和Sturm序列的最高次数项系数序列的变号数，本文给出了两个分片代数曲线的实交点数的计算公式。

The algorithm avoids the test of point of intersection.

该算法不但避免了所有的交点测试，而且使得新加入点与凸壳边的平均比较次数不大于4，从而实现了高效的三角剖分。

Nutrient components of sweet potatoes with weed management in organic cultivation was better by intercropped soybean. Crude protein, reducing sugar and starch were better with thrice intertillage. Nutrient components of sweet potatoes with different mulch was better by peanut shell.

不同方式控制杂草对甘薯营养成分之影响试验中，四种不同绿肥间植，以绿肥大豆在各成分中表现较佳；四种耕犁次数控制杂草试验，三次耕犁对粗蛋白、还原醣及淀粉有较佳之表现；四种敷盖物以花生壳对各种成分有较佳之表现。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。

This paper introduces how to use PLC realize PID automation control system in constant liquid level system of waterworks though a instance project. It adjusts liquid level by control the valve though PID arithmetic and deals with outside program, makes the liquid level constant at the expectation value. The adjusting time is the same as manual control, but the water quality is better. Its advantages are reaction rapidness, auto-control disengage intervenor, quick protection of fault, more safety and stabili...

本文以一工程实例介绍了如何用PLC在水厂的滤池实现PID恒水位控制，它通过PID算法和外围的程序处理，通过控制阀门开度来调节水位，使水位基本恒定在期望值，并且阀门调节次数基本与手动调节一样，但水质却明显好很多，更重要的是对现场适应能力强，反应快，而且完全脱离人为干预进行全自动控制，对故障也有快速保护，更具安全稳定性。

This paper introduces how to use PLC realize PID automation control system in constant liquid level system of waterworks though a instance project. It adjusts liquid level by control the valve though PID arithmetic and deals with outside program, makes the liquid level constant at the expectation value. The adjusting time is the same as manual control, but the water quality is better. Its advantages are reaction rapidness, auto-control disengage intervenor, quick protection of fault, more safety and stabilization.

本文以一工程实例介绍了如何用PLC在水厂的滤池实现PID恒水位控制，它通过PID算法和外围的程序处理，通过控制阀门开度来调节水位，使水位基本恒定在期望值，并且阀门调节次数基本与手动调节一样，但水质却明显好很多，更重要的是对现场适应能力强，反应快，而且完全脱离人为干预进行全自动控制，对故障也有快速保护，更具安全稳定性。

The increase of intraocular pressure appeared in 34% of patients in the early part.

结果 激光切孔一次成功205眼（占89%），激光能量在11～17.1 mJ，67%病例在22～84 Mj，击射次数2～33次。

Indexes of sexual function such as mount latency ,mount frequency and intromission latency were observed and recorded and statistically analyzed .

在对雌鼠给予药物催情的情况下，分两组进行交配，观察两组雄鼠爬高潜伏期，爬高总次数，插入潜伏期等性功能相关指标，并进行统计学分析。

Then , two groups of male rats copulated with female rats philtred in advance . Indexes of sexual function such as mount latency ,mount frequency and intromission latency were observed and recorded .

在对雌鼠给予药物催情的情况下，分两组进行交配，观察两组雄鼠爬高潜伏期，爬高总次数，插入潜伏期等性功能相关指标，并进行统计学分析。

Time to intubation and failed intubation attempts were recorded.

插管的时间和失败的次数被记录下来。

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。