Research on the Architectural Design Positioning of University Halls

University hall is an important carrier of information exchange and sharing in higher education campuses,and the correct architectural design positioning can improve the value of university halls.There are many different features in the design and use of university halls and urban theaters.This paper investigates the feasibility study report and indexes of university hall projects,analyzes the indexes,construction scale and functional positioning of university halls in the pre-design period,summarizes some design suggestions,and believes that the use efficiency of university halls should be improved through intensive and compound construction to meet the needs of the rapid development of Chinas Universitys and universities.

Positioning and design by computed tomography imaging in neuroendoscopic surgery of patients with chronic subdural hematoma

BACKGROUND Neuroendoscopy is a very useful technique to Chronic Subdural Hematoma(CSH).But how to achieve the goal of treatment more minimally invasive?AIM To develop a simple,fast and accurate preoperative planning method in our way for endoscopic surgery of patients with CSH.METHODS From June 2018 to May 2020,forty-two patients with CSH,admitted to our hospital,were performed endoscopic minimally invasive surgery;computed tomography(CT)imaging was employed to locate the intracerebral hematoma and select the appropriate endoscopic approach before the endoscopic surgery.The clinical data and treatment efficacy were analyzed.RESULTS According to the learning of CT scanning images,the surgeon can accurately design the best minimally invasive neuroendoscopic surgical approach and realize the precise positioning and design of the drilling site of the skull and the size of the bone window,so as to provide the most effective operation space with the smallest bone window.In this group,the average operation time was only about 1 h,and the clearance rate of hematoma was about 95%.CONCLUSION Patients with CSH can achieve good therapeutic effect by using our way to positioning and design to assist the operation of CSH according to CT scan and image,and our way is very useful and necessary.

Beam Position and Beam Hopping Design for LEO Satellite Communications

The numbers of beam positions(BPs)and time slots for beam hopping(BH)dominate the latency of LEO satellite communications.Aiming at minimizing the number of BPs subject to a predefined requirement on the radius of BP,a low-complexity user density-based BP design scheme is proposed,where the original problem is decomposed into two subproblems,with the first one to find the sparsest user and the second one to determine the corresponding best BP.In particular,for the second subproblem,a user selection and smallest BP radius algorithm is proposed,where the nearby users are sequentially selected until the constraint of the given BP radius is no longer satisfied.These two subproblems are iteratively solved until all the users are selected.To further reduce the BP radius,a duplicated user removal algorithm is proposed to decrease the number of the users covered by two or more BPs.Aiming at minimizing the number of time slots subject to the no co-channel interference(CCI)constraint and the traffic demand constraint,a low-complexity CCI-free BH design scheme is proposed,where the BPs having difficulty in satisfying the constraints are considered to be illuminated in priory.Simulation results verify the effectiveness of the proposed schemes.

双目定位多功能机械臂系统设计

准确性、快速性与鲁棒性是机械臂系统设计的要求,经过研究提出一套新形式的机器人视觉系统,利用非接触式测量,对所操控单元进行位姿计算,完成操控单元的三维信息与机械臂执行单元进行命令交互。设计采用双目CMOS工业相机,通过Matlab进行相机标定并得到内外参数,然后进行立体校正,结合SGBM立体匹配算法解算出位置深度信息,进而对应帧的二维图像,利用OpenCV视觉算法获取操控器下端标志物的三维坐标,传递执行指令给机械部控制单元。由实验结果分析,在白光环境下该机器人系统同步现实功能展现出良好的跟随准确性,精度误差始终保持在4.5%以内,命令响应时间短,鲁棒性好。