查询词典 trilateration

After concretely analyzing three triangles which are Sino-Indian-US relations, Sino-Indian-Russian relations, and Sino-Indian-Pakistan relations, the author thinks that all these trilateration relations appear benign interaction direction since the end of Cold War, the influence of external factors on Sino-Indian relations become weak but its passive influence is still severe.

通过具体分析中印美、中印俄和中印巴这三个三角关系，认为冷战结束以来，各三边关系出现了良性互动的趋势，外部因素对中印关系的影响有所减弱，但是外部因素对中印关系的消极影响仍然严重。

Furthermore, they continuously transmit radio signals of low power and ultra high frequency. They are also equipped with atomic clocks. When GPS receivers intend to calculate its GPS position on the earth, they will receive the signals from satellites, calculate transmission time with a pre-stored ephemeri, and then calculate the distances between themselves and at least four GPS satellites with the method of trilateration.

所有的卫星架有原子钟，当GPS接收器要找出自己目前在地球表面上的位置时，会接收各卫星的讯号，并依储存的星历表计算传送时间，再利用三边测量法订出自己与至少四颗GPS卫星之间的精确距离，即可算出所在位置。

Develops an emulator for single target tracking of acoustic wireless sensor networks in Visual C++ 6.0 and MATLAB 6.5, and extensive simulations have been conducted to characterize performance of the node self-organizing algorithm, weighted-centroid target localization algorithm and trilateration.

在Windows操作系统平台上，使用Visual C++6.0和MATLAB 6.5开发了一个基于声音的无线传感器网络单目标跟踪仿真实验平台WinWSNSim，并在该平台上，对基于声音能量的传感器网络节点自组织策略、加权质心定位算法以及三边测量定位算法进行了仿真实验。

In this algorithm, the Received Signal Strength Indicator ranging technique is employed to replace the distance measurement of one hop away from the anchor node in DV-Hop algorithm. Also a 2-D Hyperbolic algorithm is used to replace the trilateration algorithm in DV-Hop.

该算法引入接收信号强度指示器测距技术代替DV-Hop算法中到锚节点一跳距离测量并采用2-D Hyperbolic算法代替DV-Hop算法中三边测量法。

node location is one of the key technologies in wireless sensor network.rssi－based location is a hotspot in nowadays.for resolving biggish error in rssi－based location,the paper presents a new method of location,rssi－based triangle and centroid location,using triangle and centroid method to reduce the error of rssi measurement.simulation experiments prove that this algorithm can obviously improve the location accuracy compared to trilateration.

摘 要：节点定位是无线传感器网络中的关键技术之一。基于rssi的定位技术是现阶段研究的热点，为解决rssi测量方法定位误差较大的问题，提出一种将rssi测量方法与三角形质心算法相结合的新型定位算法，该算法用三角形质心算法减小rssi的测量误差。仿真表明该算法比基于rssi的三边测量法定位算法的定位精度有较大提高。

The practice of the project indicates that the sur-veying method of trilateration network or triangulateration network for large-sized bridge can fulfil the accuracy requirements for construction control network.

根据实践成果得出大型桥梁控制网测量采用测边网或边角网方案可以达到精密施工控制网的精度要求，边角网平差计算采用验后定权法较合理。

The equal distance 3-improved-coverage number of beacon sending position is presented according the acreage of ROI.Then a simple method is put forward to calculate the coordinates of the sending positions in rectangular ROI.Aiming at the shortage of the existent sequence algorithm,when beacon moves according to the path and emits RF signals at every position,the ant colony algorithm is applied to the position sequence so as to get the beacon sending position.Further,in this algorithm the sensors could work out their position with trilateration.

根据ROI面积给出了等距三重优化覆盖此ROI所需要的信标发射位置数量计算方法；随后对矩形ROI提出了一种简单的信标发射位置确定方法；针对现有的遍历发射位置点的路径遍历算法的不足，提出了一种新的应用蚁群算法的信标发射位置点的遍历算法，并利用该算法对基于三边测量方法进行传感器节点定位。

The algorithm uses the RF packet only to obtain the distance differences between unknown node and beacon nodes. Then the algorithm figure out the node"s coordinates by the improved trilateration to implement the long distance, controllable accuracy, low-cost localization. Second, this paper proposes a distributed Kalman algorithm to optimize the TDOA"s error.

算法的基本思路是直接利用无线通信模块的射频分组求得未知节点到各个信标节点的距离之差，然后利用改进型的三边定位法计算出节点的坐标，对节点实施远距离、精度可控、低成本的定位。

Without measuring the relative angles between objects, the validity of traffic accident on-site sketch is often challenged. In Taiwan, two common measuring methods for drawing a traffic accident on-site sketch: one is trilateration method, and another one is offset method. Both methods have their limits.

现行，常用於绘制交通事故现场图的量测方法有二：一为三定点法，此法常因测线间夹角过大或过小时，使得当测线彼此间的夹角有微小误差时，即造成颇大的位置偏移误差；另一方法为直角坐标法，此法应用在交通事故现场绘制的测量，假设目测标定於基准线与基准线外之测量点的连线成直角，若不为直角时，易造成绘制结果的偏差。

North-frontal Qilianshan ; fault zone ; Recent tectonic movement ; Precise levelling ; Trilateration

祁连山北缘断裂带；现代构造运动；地形变

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。