距离

The focusing beam radius' ratio between the telescope lens compound system and the single lens increases via length (70~400mm) increasing, and the maximum ratio is 30, meanwhile the ratio between the telescope-lens compound system and the single lens decreases via length (70-400 mm) shorting, but the maximum difference of the focusing beam radius' is 0.043μm.

结果表明，随着距离(70~400mm)的增加，两者的聚焦效果相差增大，最大为30倍；随着距离(70~400mm)的减小，两者的聚焦效果相差减小；经望远镜和薄聚焦透镜组合系统聚焦的高斯光束束腰处光斑半径随距离(70~400mm)变化的最大值为0.043μm。

To combine together, can examination arrive the car reverse the car medium, its stumbling block and car of distance, pass a LCD manifestation to hold a manifestation distance, and according to stumbling block and car tail distance far near solid hour send out to report to the police grade.

该系统将微计算机技术与超声波的测距技术、传感器技术等相结合，可检测到汽车倒车中，其障碍物与汽车的距离，通过液晶显示屏显示距离，并根据障碍物与车尾距离远近实时发出报警等级。

Chirp scaling algorithm is considered more efficient and widely applicable when the bistatic SAR system is in side-look or small squint angle mode,but in large squint angle case,the errors caused by Taylor expansion are so large that the algorithm could lose its precision.In such a case,an equivalent mono-static SAR range mode which has fewer errors than Taylor expansion with large squint angle is proposed to substitute the range history of bistatic SAR.Then bistatic SAR images with large squint angles are gotten by common Nonlinear CS algorithm.The effectivity of the method is verified by Matlab simulation.

在正侧视或小斜视情况下，CS算法具有较好的聚焦性能和广泛的适用性，但在斜视角较大的情况下，该算法将散焦而不能成像，因而提出了用等效的单基地距离模型来代替双基地距离历史的方法，解决了大斜视角情况下距离模型二阶近似误差较大的问题，并结合单基地非线性CS算法，实现了在大斜视角情况下的基于GPS反射信号的双基地SAR高精度成像，最后通过Matlab仿真进行了验证。

a system of along-track mode sar based on the gps is established.by seeing the gps signal as a chirp,chirp scaling algorithm of this mode with large squint angle is investigated.chirp scaling algorithm is considered more efficient and widely applicable when the bistatic sar system is in side-look or small squint angle mode,but in large squint angle case,the errors caused by taylor expansion are so large that the algorithm could lose its precision.in such a case,an equivalent mono-static sar range mode which has fewer errors than taylor expansion with large squint angle is proposed to substitute the range history of bistatic sar.then bistatic sar images with large squint angles are gotten by common nonlinear cs algorithm.the effectivity of the method is verified by matlab simulation.

摘 要：建立了基于gps的顺轨sar系统模型，通过将gps信号等效为chirp信号，研究了在该模式下的大斜视角chirp scaling算法。在正侧视或小斜视情况下，cs算法具有较好的聚焦性能和广泛的适用性，但在斜视角较大的情况下，该算法将散焦而不能成像，因而提出了用等效的单基地距离模型来代替双基地距离历史的方法，解决了大斜视角情况下距离模型二阶近似误差较大的问题，并结合单基地非线性cs算法，实现了在大斜视角情况下的基于gps反射信号的双基地sar高精度成像，最后通过matlab仿真进行了验证。

Shoulder joint angle and wrist joint angle changes have nothing to do with shooting distance; shoulder joint angle speed and wrist angle joint angle speed have nothing to do with shooting distance.

四、 不同距离投篮肩关节角度、腕关节角度变化与距离远近无关；肩关节角速度、腕关节角速度变化与距离远近无关。

Results:The anterior bundle of the UCL starts from anterior inferior part of the medial condyle,and ends on the sublimis tubercle in front of the coronoid process of ulna,locating in the deep layer of the flexor carpal ulnar muscle.The distance between ulnar nerve and UCL is (0.9±0.1)cm in the center of cubital tunnel,and (0.6±0.3)cm in the distal foramen of cubital tunnel.The distance from the point of ulnar nerve entering the flexor carpi ulnar muscle to the medial epicondyle is (3.7±0.8)cm.The distance between the closest branch innervated flexor muscle of the median nerve and the approach is (1.6±0.5)cm at the level of medial epicondyle,and (0.9±0.4)cm at the level of ulnar tubercle.

结果：UCL前束起于肱骨内侧髁的前下方，止于尺骨冠突内侧的小结节，UCL前束位于尺侧腕屈肌肱头、尺头之间的深层；尺神经在肘管中部与尺侧副韧带前束的平均距离为(0.9±0.1)cm，在肘管的远侧出口，距尺侧副韧带的尺骨止点(0.6±0.3)cm；尺神经至尺侧腕屈肌尺头肌支的入肌点距肱骨内侧髁的距离为(3.7±0.8)cm；正中神经最靠近切口的分支距切口的距离，在肱骨内侧髁和尺骨结节水平分别为(1.6±0.5)cm和(0.9±0.4)cm。

"The objects can be thought of as points in space, with the distance between points given by a distance formula, such that:(1) the distance from point A to point B is zero if and only if A and B are identical ,"

可以把这些对象想成是空间中的点，两点之间的距离由距离公式给定，于是：(1)只有当A和B是重合的时候，A到B的距离才为零

The new distance formula considers the density information of representative points, so the clustering result is more precise than those using the existing similar methods.

其中新的距离公式考虑到代表点的密度和它们之间的距离同样重要，故将密度信息加入到距离计算之中，从而使聚类结果更加精确。

The results showed that the muscle weight of botulinum toxin injection side decreased. The craniofacial morphology of the botulinum toxin injection side were smaller in distances of zygomatic arch to mandibular lower border and ramus height than that of the normal saline injection side.

结果发现实验组大白鼠施打肉毒杆菌神经毒素侧其咬肌重量较施打生理食盐水侧及对照组小，其颅颜骨型态在颧骨弓至下颚骨缘距离，冠状突切迹最前端至下颚骨角状突最下点距离，均小於生理食盐水侧距离，有统计上之差异。

In feature classification, mean- Euclidean distance performances better than general Euclidean distance and Mahalanobis distance.

在特征聚类方法中，均一化欧氏距离的聚类效果优于欧氏距离和马氏距离。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。