基本曲线

The main idea of the q-stack is to stack data along parabolas which are the least-squares approximation to normal moveout so that the computing time can be reduced.

它的基本思想是采用双曲时距曲线的最小平方逼近抛物线来提高速度迭加的计算效率。

For cutting the composite lock gear with unequal tooth thickness, a study is made on the design method of gear sharper cutter with nonstandard parameter involute tooth profile and noninvolute tooth profile. The cutter tooth arrangement, the choice of teeth number of the cutter and the basic method of cutter design are discussed; and a new method of choosing deflection factor by using limited area is presented.

研究加工不等齿厚的非标准参数渐开线齿形，与非渐开线齿形复合的锁闭齿轮插齿刀刀齿的排列、刀具齿数的选择以及刀具设计的基本方法，介绍用限制区域选择插齿刀变位系数的新方法，并给出刀具齿顶后角与侧螺旋角的关系曲线，为插齿刀参数的选择提供依据。

Graphics suitable for beginners who are basic drawing and filling and graphic transformation, Pui-page wire drawing curves.

适合初学图形学的人，都是基本的绘图与填充及图形变换，贝页丝曲线的绘制。

The processed results show that the new bond index curve is relatively smooth and the value is close to one in the well-bonded second interface, which can basically eliminate the influence of the formation velocity on the bond quality of second interface and can improve the evaluation quality of second interface.

评价结果表明，新的胶结指数曲线在固井Ⅱ界面胶结良好井段相对较平滑且数值接近于1，基本能够消除地层声速对Ⅱ界面胶结质量的影响，进而改进了固井Ⅱ界面的评价质量。

The results indicate that the stable temperature time is in accordance with the response time of actual temperature/EMF curve.

结果表明，模拟锆管达到稳定温度的时间与实测得的温度／电动势曲线的响应时间基本相符。

On the basis of the former researches and taking into account the practice of our country, this paper take the low period repeat loading experiment for three rigid conjunction node of steel beam and concrete wall, researching their load-bearing capacity and earthquake resistance performance under the low period repeat loading action, the main content concentrate on the following aspects:(1) Analyzing the three joint's damage shape、hysteretic curve、change of rigidity、yielding load、limit load、damage load、durability、energy dissipation capacity、the strain of the key position and the moment transferring mechanism.(2) Comparing the joint's load-bearing capacity and earthquake resistance performance among the joints with different stud bolt diameter and different connection plate thickness, researching some factor's influence on the work performance of the joint such as the high and strong stud bolt specification、connection plate thickness .

本文在前人研究的基础上，结合我国的实际情况，对3个钢梁-混凝土墙刚接节点试件进行了低周反复荷载试验，对其在低周反复荷载作用下的承载力和抗震性能进行了研究，内容主要集中在以下几个方面：(1)对3个节点试件在低周反复荷载作用下的破坏形态、滞回曲线特性、刚度变化、屈服荷载、极限荷载、破坏荷载、延性性能、耗能能力、关键部位的应变分布情况及节点核心区的受力情况进行了试验研究和理论分析；(2)比较了不同螺栓规格和不同连接板厚度的节点试件的承载力和抗震性能，研究了高强螺栓规格和连接板厚度这2个因素对节点工作性能的影响；(3)介绍了光纤光栅传感技术在土木工程领域中的应用研究现状及其基本原理；并通过对比试验，探讨了光纤光栅传感器用于土木工程检测的可行性及实现途径。

Then the flow regime in the wells is studied.Firstly, the energy dissipation engineerings are systematically concluded. Then circular stilling well hydraulic model is made.The paper presents guidelines to aid the designers in determining optimum well geometry for their specific needs. General design criteria have been established to determine well size based on design discharge, Q, and diameter of the standard sleeve valve, D.

本文首先较系统地总结了消能工的研究现状；设计制作圆形深筒式消力井水工模型，通过试验及数据分析建立了圆形深筒式消力井各变量间的函数关系式，得出圆形深筒式消力井水力设计的基本方法，即已知设计流量和进水管直径，由曲线可得到圆形深筒式消力井的最优尺寸，并运用工程算例进行验证。

Experiments were carried out to verify the static model. Experimental results show that the experimental curve matched well with the simulated curve, and there was certain error between them (maximal static error is 0.035 rad). The error cause was analyzed. Then the experiments were carried out to measure the dynamic performances of the side-sway joint. Experimental results show that the step response time of the joint was about 2 s steady value's tolerance zone ?

完成了侧摆关节静态特性试验，试验结果与仿真曲线基本吻合，验证了静态模型的正确性，但存在一定误差（最大静态误差为0.035 rad），分析了误差原因；对侧摆关节进行了动态特性试验，试验结果表明对于不同的期望值角度阶跃信号，侧摆关节开环阶跃响应时间大约是2 s

In this paper, taking nodal injection power and voltage operation curve of PV node as foundation, according to the basic property of numerical characteristics of random variables and relevant equations for probabilistic load flow calculation the expectations of nodal current, reactive power at PV node and power at balancing node as well as computing formula of covariances are derived by different methods; the computation accuracy of various algorithms are compared and analyzed.

文章以节点注入功率和PV节点电压运行曲线为基础，依据随机变量数字特征的基本性质和概率潮流计算的相关方程，分别采用不同的方法推导了节点电流、PV节点的无功功率及平衡节点功率的均值和协方差计算公式，比较和分析了各种算法的计算精度。

PCDSG displays basic observational data at Wushan station of Guangzhou,four stations nearly,Qingyuan rawinsonde station and Hengshan station.Time series curves of pressure,temperature,humidity and upper air physical values are also included.PCDSG has been used in routine service and appeared as a valuable tool for short - term weather forcast in Guangzhou.

系统可实时显示广州五山站、四个县级市、清远探空站、衡山站的基本资料，显示气压、温度、湿度等观测要素或清运探空站物理量的时间演变曲线。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。