查询词典 tracing point

Based on Fermat's principle, the paper uses full-path iterative algorithm to realize 3-D VSP two-point ray tracing in volume element model.

本文基于费马原理，利用全路径迭代算法实现体元模型中的三维VSP两点射线追踪。

According to evaluation of the thermal, hydraulic, environmental and mechanic characteristics and energy performance of building and VAV air-conditioning system, and evaluation of the control performance of local control loops using the simulator of VAV system, this paper presents five on-line supervisory control strategies for local control loops: on-line optimization of VAV supply air static pressure set-point, on-line optimization of AHU supply air temperature set-point, on-line optimization of on/off set of CAV sub-system, on-line optimization of outdoor air set-point and on-line optimization of chilled water secondary pump pressure set-point.

通过数字仿真器对建筑物及其变风量空调系统的热力、动力、环境和能耗等运行特性的模拟，以及对系统常规采用的下位机控制回路可控性和稳定性等控制特性的研究和分析，本文先从局部的角度开展了系统局部优化的研究。提出并在仿真器上分别实施了VAV送风静压设定的实时优化，AHU送风温度设定的实时优化，CAV子系统开／停的实时优化，新风量设定的实时优化以及二级泵冷媒水供水压差设定的实时优化。

In chapter three, the new concepts of the bifurcation point and asymptotic bifurcation point of compact continuous operators in Menger PN-spaces are introduced. Some sufficient conditions for the existence of the bifurcation point and asymptotic bifurcation point are obtained. And the problems on the intrinsic value and intrinsic element of compact continuous operators are studied in Menger PN-spaces. A series of theorems on the existence of the intrinsic value and intrinsic element are obtained.

第三章，在概率赋范线性空间中提出非线性算子的歧点和渐近歧点的新概念，获得了非线性算子存在歧点和渐近歧点的充分条件；讨论了Menger概率赋范线性空间中非线性算子的固有值和固有元问题，得到了非线性算子存在固有值和固有元的一系列充分条件。

During 3D seismic data acquisition in Berri Block of Saudi Arabia,GPS navigation system was used while shooting,and monitoring shot-point drift on the interface of GPS navigation system,to initially control shot point error. Then,the method was applied to control seismic data acquisition quality,to analyze and examine shot-point drift and receiver-point drift.

在沙特Berri工区三维地震数据采集过程中，首先在放炮时采用GPS导航系统，在导航系统监控软件界面上监测炮点偏移情况，初步控制炮点误差；然后利用基于最小偏移距分选方法对地震数据采集质量进行监控，并对炮点和检波点偏移误差进行分析和检查。

Traditional photogrammetry was based on forward intersection and resection using survey point, so collinear equation （object point, image point and center of projection lie in a line） was the kernel of the whole photogrammetry, and relative orientation and absolute orientation were based on ideology of coplanar corresponding image point.

传统摄影测量是基于测点的前方交会和后方交会，所以共线方程（即物点、像点与摄影中心位于一条直线上）是整个摄影测量的核心。

In the study of the relation of the tangent and the tangent point of conics,this paper will introduce a solution to the problem in seeking the tangent and the tangent point of conics,with mapping the tangent into tangent point or mapping the tangent point into tangent using mapping correspondence.

为了研究二次曲线的切线与其切点的关系，借助对射对应将切点映射成切线或将切线映射为切点，解决求二次曲线的切线和切点的问

The 1 point to 0 point is called to be constriction and 0 point to 1 point is called to be expansion.

这时候则叫排斥力。1点到0点叫收缩，0点到1点叫膨胀。

Manual part programming can be used for both point-to-point and contouring jobs It is most suited for point-to-point machining operations such as drilling.

手工编程的一部分，可用于双方点对点和轮廓就业机会，这是最适合点到点的机械操作，如钻井。

An improved algorithm of two dimensional convex hull based on included angle is proposed, and all the convex points are achieved through the maximal included angle by the increasing counter-clockwise direction. When more than one point satisfies the maximal included angle, the most distant point to the previous point is regarded as the next convex point.

提出了基于夹角的平面点集凸包改进算法，以最大夹角，按顺时针的方向可得到所有的凸点，当满足最大夹角的点不唯一时，以离当前凸点最远的点为凸点。

Diving in the Maldives are familiar with diving services, almost all from Germany and Switzerland to the DIVE MASTER, almost all types of diving BOAT DIVE, the day diving trip, from a fixed point in the morning and 9:00 pm 2 The main point of departure, regardless of which one-point dive, dive to sit with the "DHONI Anthony ship", in the range of about 10-30 minutes, going farther if the diving point, the range of about 60-90 minutes in between.

在马尔代夫熟悉潜水点与潜水服务的，几乎全是从德国与瑞士来的DIVE MASTER，潜水型态几乎全是BOAT DIVE，每天的潜水行程，固定从早上9点出发与下午2点出发为主，无论是哪一个潜水点，坐潜水用的「DHONI多尼船」，航程约在10到30分钟间，如果到比较远的潜水点，则航程约在60至90分钟间。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48