广州黄沙某深基坑由于周边环境复杂，地质条件差，且采用非对称支撑结构，基坑工程实行信息化施工，监测并分析了其水平位移、侧向变形、沉降、地下水位、锚索拉力、支撑轴力的变化情况，及时解决发生的险情，确保了基坑安全。

Due to the complex surrounding environment, poor geological conditions and the asymmetric supporting structure, the information construction of foundation pit in Guangzhou is implemented. Engineers monitor and analyse the variation of the horizontal displacement, lateral deformation, settlement, water level,pulling force of anchor wire, axial force of support of foundation pit, and solve the dangers timely, Which ensure the safety of foundation pit.

RFQ(射频四极透镜)是直线加速器中最重要的前级聚焦加速结构,其工作模式下束流孔中的电场四极对称性是保证束流品质及加速效率的关键。为了解决其各自存在的工作模式下四极场的不对称问题,分别对四杆型RFQ和四翼型RFQ的结构和模式谐振特性做了研究。针对四翼型RFQ,模拟显示双端口对称耦合的方式从抵消二极模式和提高结构对称性两方面来达到削弱工作模式下的场分布中二极量的目的,对一个1 m段四翼RFQ模型腔的测量证实了双端口对称耦合抵消腔内二极模式的有效性;针对四杆型RFQ的二极场,以SSC-Linac项目的RFQ为原型,利用三维模拟计算软件CST-MWS进行模拟,通过改进支撑板的结构并调整参数,完全地消除了工作模式下的极间二极场,且理论上此种改进方法对支撑板结构的四杆型RFQ均有效。

Radio Frequency Quadruple(RFQ) is the most important front-end acceleration structure in linear acceler-ators. It can focus and accelerate beam in longitudinal and transversal direction, simultaneously. Symmetric of electric field in acceleration aperture is very important for the beam dynamics. To an idea RFQ, there is only quadruple electric field in the acceleration aperture. The dipole field in aperture is harmful and need be as small as possible. The methods to reduce it are studied in a four-rod RFQ and a four-vane RFQ in the article independently. To a four-vane RFQ, the symmetrical double-port couplers are employed to counteract the neighboring dipole modes. The availability is confirmed by the simulation with the 3-D Finite Element tool, CST-MWS. And it is also observed by measuring a model-cavity with a symmetrical double-port couplers. To a four-rod RFQ, a new structure of stems is proposed to reduce the dipole mode. Taking the RFQ for the SSC-LINAC project as example, the d

室内场景,连同建筑和植物,是构成人类生存环境的三大重要因素。但是,目前可获取的三维室内场景并不像人们期望的那样是经过了合理性语义层面上的分割,而是存在着大量的拓扑结构上的错误。这些拓扑错误是由模型重用产生的碎片以及模型转换中导致的信息缺失等因素造成的。本文通过考虑拓扑结构关系(支撑关系和主次关系)以及几何关系(对称、对齐、相交、连接等),循环迭代地利用图割方法,构建了一个具有层次结构的场景树。该层次结构树对场景进行了层级的重整,用户可以根据需要得到不同细节层次上的有意义的语义分割,从而纠正了原有模型拓扑结构上的错误,为进一步的场景编辑提供了便利。

Indoor scene plays an important role in human living environment which constitutes the urban landscape together with building and flora reconstruction. However, the accessible 3D indoor scene data are usually not as semantic and reasonable as expected. They may contain a multitude of topological errors and omissions. This easily results in fragments production during model reusing and incompatible transform during format conversion. We creatively build a scene hierarchy using“Graph Cuts”method iteratively by considering the topological relation (“support&non-support”and“primary&non-primary”) and geometry relation (symmetry, alignment, intersection and connectivity). The hierarchy reorganizes the scene in different levels and users could select the required level of detail which contains semantic segmentation. It corrects the topological errors and offer convenience for further scene edit.

针对两种目前常用于椰子采摘的采摘方法—人工攀爬采摘和采摘机刀具切割采摘出现的劳动强度大、作业危险及效率低等问题设计了一种抓取采摘机械手。采摘机械手底座固定在椰子采摘机上，通过旋转功能组件实现采摘手抓的左右摆动，依靠气压升降、摆臂功能组件实现采摘手抓的升降和俯仰，利用机械手外手抓抓住果蒂，内手抓抓住椰子旋转采摘。为此，介绍了采摘机械手总体结构设计及工作原理，对其关键结构进行了建模，并进行了工作空间仿真分析。仿真结果表明：所设计的椰子采摘机械手工作点分布密集对称，满足工况需求，为进一步实际采摘实验提供了理论支撑。

Aimed at problems such as labor-intensive , operating hazards , low efficiency which appear on currently two methods used commonly in coconut picking-manpower climbing picking and picking machine tool cutting picking , de-signed a robot arm to crawl picking .The pedestal of robot arm is fixed on the coconut picker ,by rotating functional com-ponents to achieve picking hands''s swing , relying on pneumatic lift and arm grasping picking functional components to a-chieve lift and pitch , using the robot arm ’ s outer hand claw to catch the base of fruit , and using the internal hand to catch the coconut for rotating picking .The article firstly describes the picking robot hand''s overall structure designing and working principle ,then its key structures are established into a model , finally conducts a simulation analysis to its work space .Simulation results show that coconut picking manipulator operating point designed by the paper is densely distribu -ted symmetrically ,and