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Fitting boxes to Manhattan scenes using linear integer programming

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International Journal of Digital Earth 2016年第8期9卷 806-817页

作者： minglei li liangliang Nan Shaochuang liu Integrated Spatial Information Lab Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijingPeople’s Republic of China Visual Computing Center King Abdullah University of Science and TechnologyThuwalSaudi Arabia

We propose an approach for automatic generation of building models by assembling a set of boxes using a Manhattan-world *** method first aligns the point cloud with a per-building local coordinate system,and then fits axis-aligned planes to the point cloud through an iterative regularization *** refined planes partition the space of the data into a series of compact cubic cells(candidate boxes)spanning the entire 3D space of the input *** then choose to approximate the target building by the assembly of a subset of these candidate boxes using a binary linear programming *** objective function is designed to maximize the point cloud coverage and the compactness of the final ***,all selected boxes are merged into a lightweight polygonal mesh model,which is suitable for interactive visualization of large scale urban *** results and a comparison with state-of-the-art methods demonstrate the effectiveness of the proposed framework.

关键词： Urban building models aerial point cloud Manhattan scenes linear integer programming

FPGA-based plasma sterilization device for wound-edge recognition

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Nanotechnology and Precision Engineering 2024年第3期7卷 56-70页

作者： Huijuan Lu Xiaorong Tang minglei li Xueping Jiang Wenxiang Xiao Hua li School of life and Environmental Sciences Guilin University of Electronic TechnologyGuilin 541004People’s Republic of China Guilin URIT MEDICAL Electronic Sales Co. Ltd.Guilin 541004People’s Republic of China

There is a currently a lack of large-area plasma sterilization devices that can intelligently identify the shape of a wound for automatic *** this reason,in this work,a plasma sterilization device with wound-edge recognition was developed using aﬁeld-programmable gate array(FPGA)and a high-performance image-processing platform to realize intelligent and precise sterilization of *** was used to design the mechanical structure of the device,and it was manufactured using 3D *** device used an improvement of the traditional Sobel detection algorithm,which extends the detection of edges in only the x and y directions to eight directions(0○,45○,90○,135○,180○,225○,270○,and 315○),completing the wound-edge detection by adaptive *** device can be controlled according to different shapes of sterilization area to adjust the positioning of a single plasma-jet tube in the horizontal plane for two-dimensional move-ment;the distance between the plasma-jet tube and the surface of the object to be sterilized can be also adjusted in the vertical *** this way,motors are used to move the plasma jet and achieve automatic,efﬁcient,and accurate plasma *** was found that a good sterilization effect could be achieved at both the culture-medium level and the biological-tissue *** ideal sterilization parameters at the culture-medium level were a speed of 2 mm/s and aﬂow rate of 0.6 slm,while at the biological-tissue level,these values were 1 mm/s and 0.6 slm,respectively.

关键词： FPGA Wound-edge recognition Improvement of the Sobel algorithm Plasma Automatic and precise sterilization

Realizing high efficiency and large-area sterilization by a rotating plasma jet device

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Plasma Science and Technology 2022年第4期24卷 133-146页

作者： Hua li minglei li Hongcheng ZHU Yuhan ZHANG Xiaoxia DU Zhencheng CHEN Wenxiang XIAO Kun liU School of life and Environmental Sciences Guilin University of Electronic TechnologyGuilin 541004People's Republic of China The State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044People's Republic of China

By tilting a plasma jet and rotating 360°,a large-area can be scanned and sterilized in a short *** with the previous array device,this pipe has the significant advantages of high sterilization uniformity and low gas ***,a rotatable plasma jet device,which can control the swing and rotation of a jet pipe,is designed,and a corresponding theoretical model is established to guide the ***,with Staphylococcus aureus(***)and Escherichia coli(***)as the target bacteria,the device achieves a short sterilization time of 158 s—the minimum sterilization flow of *** and *** is 0.8 slm and 0.6 slm,*** device is compared with an array plasma sterilization device in terms of sterilization speed and gas *** results show that the device is not only better than an array plasma sterilization device with respect to scanning uniformity,but also far less than the array plasma sterilization device in gas consumption of 5 ***,the device has great potential in applications involving efficient,large-area sterilization.

关键词： low-temperature plasma sterilization rotate large area applications

Research on the Application-oriented Art Academy Studio System based on Computer Technology

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International Journal of Technology Management 2013年第5期 26-31页

作者： Wenjun DAI Dingyu WU minglei XU Wenwen li Advertising College Beijing Union University

Application-oriented art academies are professional institutions in which high importance is attached to the training of skills, and play a great help in the improvement of art majors＇ ability to apply professional knowledge. The establishment of a practice-oriented educational plan is an educational demand on the skills training of art majors. Studio system is one of the very important systems in the educational management of the application-oriented colleges and universities. In this paper, new ideas about the construction of studio system are first elaborated, and then the functional characteristics of computer applied to studio system and the innovation flow of studio system based on computer technology are analyzed. It is hoped that this paper can be helpful for the follow-up studies.

关键词： Computer Technology Application-oriented Art Academies Studio System Research

Study on water stability and photodegradation of organic compounds with vanadium doped NH2-MIL-125

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Study on water stability and photodegradation of organic com...

Immediate or delayed repair of pelvic fracture urethral disruption defects in young boys： twenty years of comparative experience

2018年中西部地区无机化学化工学术研讨会

作者： li minglei Ren Guochang Deng Yuheng Department of chemistry Capital Normal University

The Ti-based MOFs [NH-MIL-125(Ti)] is a kind of porous material with optical response capability, but its application is restricted to the characteristics of easy hydrolysis and composition of photolytic carriers. According to the relevant literatures, the doping of transition metal can effectively separate the photogenic carriers, thus improving the light responsiveness. In this work, V-doped NH-MIL-125(Ti) was prepared and characterized by XRD, XPS, EDX and its stability in the water, and applied in Photocatalytic degradation of Rhodamine B. The results show that the doping of Vanadium not only enhances the photocatalytic degradation, but also improves the stability of the water.

关键词： NH2-MIL-125(Ti) Vanadium doped Water stability Photocatalytic degradation

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Chinese Medical Journal 2014年第19期127卷 3418-3422页

作者： Qu Yanchao Zhang Weiping Sun Ning Huang Chengru Tian Jun li minglei, Song Hongcheng li Ning Department of Urology Beijing Children's Hospital Capital MedicalUniversity Beijing 100045 China

Background The treatment of the patient with pelvic fracture urethral disruption defects （PFUDD） remains controversial especially in pediatric urology. Debate continues in regarding the advisability of immediate repair versus delayed repair. The aim of this study was to analyze our experience in the outcomes of immediate and delayed repair of pelvic fracture urethral distraction defects in young boys. Methods We retrospectively reviewed the records of 210 boys with posterior urethral disruption after pelvic injury between 1992 and 2012. Exclude partial urethral injury, a total of 177 cases acquired follow-up. All patients were evaluated by plain radiography, ultrasonography, or a computed tomography scan to assess the conditions of the upper urinary tract and to exclude other severe injuries. Data on 35 patients who underwent immediate repair were compared to those on 142 treated with delayed urethroplasty. After the diagnosis of a complete urethral injury, the immediate repair group underwent urethroplasty via the perineal approach if the patient＇s condition was stable, and serious complications were treated. The delayed repair group patients with the delayed urethroplasty average 6 months after injury. All patients were evaluated postoperatively for urethral strictures, incontinence and impotence. The patients were assessed by uroflowmetry and renal ultrasonography with evaluation of the postmictional residue every 3 months during the first year of follow-up. We assessed incontinence and erectile function by questioning the parents or the children themselves. Statistical analysis with the chi-square test was performed using SPSS software. Results One hundred and seventy-seven patients were followed up with an average 58 months （range 6 to 192 months）. Strictures developed in 3 （9%） patients in immediate repair group; two recluired direct visual internal urethrotomy （DVIU）, the other patient required dilatation. Strictures developed in 11.9% of the delayed repair g

关键词： injury urethral anastomosis children

公共治理理论视野的高等教育管办评分离模型与框架

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中国高教研究 2021年第11期 49-56页

作者：李明磊北京理工大学人文与社会科学学院北京100081

管办评分离是新时代高等教育管理体制深化综合改革的核心部署。从背景与动因看,管办评分离是高等教育管理体制的新常态,是管办分离改革政策的深化,为高等教育治理体系和治理能力现代化奠定基础。在公共治理理论视野观照下,解析高等教育... 详细信息

管办评分离是新时代高等教育管理体制深化综合改革的核心部署。从背景与动因看,管办评分离是高等教育管理体制的新常态,是管办分离改革政策的深化,为高等教育治理体系和治理能力现代化奠定基础。在公共治理理论视野观照下,解析高等教育领域"管办评""分离"的学理含义、权力性质,基于此从改革逻辑出发构建管办评分离的三角权力模型。最后从治理主体、权力基础、治理目标、治理方式等方面阐释高等教育管办评分离的公共治理框架及其要义,进而论述了管办评分离的公共治理实践变革基本条件和路径。

关键词：高等教育管办评分离公共治理

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激光扫描点云法矢精确计算与表面光顺方法

计算机辅助设计与图形学学报 2015年第7期27卷 1153-1161页

作者：李明磊张蕊李广云信息工程大学导航与空天目标工程学院郑州450001 华北水利水电大学软件学院郑州450001

为在光顺的同时保持特征,在精确计算点云表面法矢的基础上,提出附加约束的双边滤波器光顺方法.首先考虑激光扫描点云分布特点对其进行预采样处理,提高法矢估算初值的精度;然后利用抗差最小二乘拟合提高法矢估算精度,并基于拟合中误差和... 详细信息

为在光顺的同时保持特征,在精确计算点云表面法矢的基础上,提出附加约束的双边滤波器光顺方法.首先考虑激光扫描点云分布特点对其进行预采样处理,提高法矢估算初值的精度;然后利用抗差最小二乘拟合提高法矢估算精度,并基于拟合中误差和点间距离构造双边滤波器对法矢进行进一步修正,得到较为精确的法矢估算结果;最后通过分析传统双边滤波器存在的问题,引入"噪声度"概念,基于噪声度和点间距离构造双边滤波器,并附加法矢和预测距离以区分拐角特征.实验结果表明了方法的特征保持能力和高效性.

关键词：激光点云法矢估算双边滤波器抗差估计表面光顺

新时代我国高等教育评估监测的治理机制及责任网络构建

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中国考试 2023年第2期 25-32页

作者：李明磊北京理工大学人文与社会科学学院北京100081

建立高等教育评估监测治理机制是深化新时代教育督导制度改革的重要支撑。我国高等教育评估监测面临着统归教育督导体制、深入推进管办评分离的宏观制度变革。在改革进程中,高等教育评估监测应完善政府分级治理,健全社会组织参与机制,... 详细信息

建立高等教育评估监测治理机制是深化新时代教育督导制度改革的重要支撑。我国高等教育评估监测面临着统归教育督导体制、深入推进管办评分离的宏观制度变革。在改革进程中,高等教育评估监测应完善政府分级治理,健全社会组织参与机制,建立专业机构跨区域运作机制,构建服务准市场机制。为应对潜在的治理失灵,高等教育评估监测应深入推进改革,规范并明晰各相关主体的治理责任,构建更加全面的责任网络。政府、高校与社会应协同发挥治理效能,共同推进高等教育评估监测治理体系和治理能力现代化。

关键词：教育评价改革高等教育治理高等教育评估高等教育改革