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The effect of Bi composition on the electrical properties of InP1-xBix

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Science China(Physics,Mechanics & Astronomy) 2017年第4期60卷 82-85页

作者： guannan wei Xing Dai Qi Feng WenGang Luo YiYang Li Kai Wang LiYao Zhang WenWu Pan ShuMin Wang ShenYuan Yang KaiYou Wang State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China State Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China State Key Laboratory of Functional Materials for lnformatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

III-V Semiconductors containing a small amount of Bi, known as dilute bismides, have attracted great interest in recent years, due to the large band-gap reduction and other unique properties [1,2]. Previous studies have been pri- marily focused on the growth and optical properties of the GaAs-based bismuthides [3], while the properties of other dilute bismides are less well understood. Berding et al. [4] theoretically predicted that InPBi is expected to be an attractive candidate for narrow-gap applications. Experimentally, the InPBi alloy with good single crystal quality has been successfully synthesized recently and exhibits strong and broad photoluminescence at room temperature [5,6]. However, the electric transport characteristics of the InPBi alloy are poorly understood. In this work, we systematically investigate the effect of Bi incorporation on electric transport properties of the InP1-xBix alloys.

关键词： In Bi Ta The effect of Bi composition on the electrical properties of InP x)Bi_x

Cobalamin-dependent radical S-adenosyl-L-methionine protein functions with a partner to successively methylate tricyclic indole alkaloid for chuangxinmycin maturation and derivatization

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Science China Chemistry 2025年第1期 308-316页

作者： Sili Wang Jiancheng Huang Yanan Du wei Huang Yufeng Xue Xiaokun Xu guannan Zhong Yuanyuan Shi Bin Hong Xiaoying Bian Wen Liu State Key Laboratory of Chemical Biology Shanghai Institute of Organic Chemistry University of Chinese Academy of SciencesChinese Academy of Sciences State Key Laboratory of Microbial Technology Shandong University National Health Commission (NHC) Key Laboratory of Biotechnology for Microbial Drugs Institute of Medicinal BiotechnologyChinese Academy of Medical Science & Peking Union Medical College

Cobalamin(Cbl)-dependent radical S-adenosyl-L-methionine(SAM) proteins constitute the largest collection of the radical SAM superfamily that has hundreds of thousands of individual members. Many of these proteins are involved in the biosynthesis of pharmaceutically important natural products to catalyze chemically demanding reactions. In the biosynthetic pathway of chuangxinmycin(CXM), a unique indole alkaloid antibiotic with potent anti-infective activity, functionalization of the characteristic thiopyrano[4,3,2-cd]indole scaffold by regio-and stereoselective C3-methylation is believed to rely on a Cbl-dependent radical process, which, however, remained to be reconstituted biochemically. We here report the dissection of this enzymatic process, which requires the incorporation of Cxm8, a Cbl-dependent radical SAM protein, with Cxm9, a DUF5825family protein that shares no homology to any proteins of known functions. Cxm8 and Cxm9 function together by forming an unexpected heterodimeric complex that selectively catalyzes C3-methylation of the tricyclic indole-S-hetero ring system in a successive manner, achieving CXM and a recently identified, C3-dimethylated congener. Detailed biochemical characterization,isotope labeling, structural simulation and bioinformatics analysis rationalized the catalysis of the Cxm8/Cxm9 complex and particularly the necessity of the DUF5825 protein for C3-methylase activity. This is the first example that a Cbl-dependent protein acts with a partner to exhibit radical SAM activity.

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同方期刊数据库

基于支持向量机和决策树CART的个人信用评估

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成都工业学院学报 2016年第4期19卷 60-62,71页

作者：魏冠男安徽财经大学安徽蚌埠233030

为了更好地控制借款人的信用风险,利用支持向量机对个人信用进行预测与分析,在支持向量机对个人信用评估产生缺陷的基础上提出基于代价敏感学的CART决策树预测个人信用的方法。实证分析表明:该方法能够较好地对借款人信用状况进行预测,... 详细信息

为了更好地控制借款人的信用风险,利用支持向量机对个人信用进行预测与分析,在支持向量机对个人信用评估产生缺陷的基础上提出基于代价敏感学的CART决策树预测个人信用的方法。实证分析表明:该方法能够较好地对借款人信用状况进行预测,为互联网金融机构进行相关风险管理提供理论依据。

关键词：支持向量机个人信用互联网金融机构 CART决策树风险管理

Erratum to： The effect of Bi composition on the electrical properties of InP1-xBix [Sci. China-Phys. Mech. Astron. 60, 047022 (2017)]

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Science China(Physics,Mechanics & Astronomy) 2018年第5期61卷 86-86页

作者： guannan wei Xing Dai Qi Feng WenGang Luo YiYang Li Kai Wang LiYao Zhang WenWu Pan ShuMin Wang ShenYuan Yang KaiYou Wang State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China State Key Laboratory of Semiconductor Materials Science Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China State Key Laboratory of Functional Materials for lnformatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China

In the original publication [ 1 ] of this paper, the last supported grant number＂ 11474247＂ should be ＂11474274＂.G. N. wei, X. Dai, Q. Feng, W. G. Luo, Y. Y. Li, K. Wang, L. Y. Zhang, W. W. Pan, S. M. Wang, S. Y.... 详细信息

关键词：书写印刷性质平底锅 Sci 奶

益阴活血明目汤治疗糖尿病性视网膜病变52例总结

维普期刊数据库评论

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维普期刊数据库

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湖南中医杂志 2007年第1期23卷 7-8页

作者：魏冠男刘仁波刘炯湖南省中医药研究院附属医院 410006 湖南省湘潭市仁和医院

目的:观察益阴活血明目汤治疗糖尿病视网膜病变(单纯型)的疗效。方法:将86例患者随机分为两组,治疗组52例采用益阴活血明目汤治疗,对照组34例采用达美康和沃丽汀治疗,疗程均为3个月。结果:治疗组总有效率为94%,对照组总有效率为68%,两... 详细信息

目的:观察益阴活血明目汤治疗糖尿病视网膜病变(单纯型)的疗效。方法:将86例患者随机分为两组,治疗组52例采用益阴活血明目汤治疗,对照组34例采用达美康和沃丽汀治疗,疗程均为3个月。结果:治疗组总有效率为94%,对照组总有效率为68%,两组比较,P<0.01。结论:益阴活血明目汤治疗糖尿病视网膜病变(单纯型)有明显疗效。

关键词：糖尿病视网膜病变中医药疗法益阴活血明目汤

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三相CSR非线性和有源阻尼复合控制研究

电气传动 2019年第2期49卷 45-48页

作者：张强臧越王雷董砚魏冠男周先杰河北工业大学控制科学与工程学院天津300131 天津电气科学研究院有限公司天津300301

三相电流型PWM整流器(CSR)可以实现直流侧的调压调功,而且能够实现网侧电压电流同相位,减少网侧谐波含量。针对三相CSR的非线性耦合系统进行输入输出精确线性化,为了提高电流跟踪特性和鲁棒性并且抑制网侧LC滤波器的谐振尖峰,设计了非... 详细信息

三相电流型PWM整流器(CSR)可以实现直流侧的调压调功,而且能够实现网侧电压电流同相位,减少网侧谐波含量。针对三相CSR的非线性耦合系统进行输入输出精确线性化,为了提高电流跟踪特性和鲁棒性并且抑制网侧LC滤波器的谐振尖峰,设计了非线性和有源阻尼复合控制器。通过Matlab/Simulink进行仿真,并且搭建了基于三相CSR的感应加热电源的实验样机对以上控制策略进行验证,结果证明该控制算法的有效性和合理性。

关键词：电流型PWM整流器感应加热电源变结构控制有源阻尼

基于最小二乘原理的移动测量传感器集成检校技术研究

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工程勘察 2018年第2期46卷 53-57,70页

作者：石若明魏冠楠郭明杨昊北京建筑大学北京100044 济宁市勘测院山东济宁272100

移动激光雷达测量系统由多个传感器集合而成,各传感器采集数据相对独立,集成安装后获取点云精度质量通常难以控制。针对这一问题,提出了一种基于最小二乘平差原理的特征点检校方法,结合空间配准算法构建推导平差模型,求解误差参数。通... 详细信息

移动激光雷达测量系统由多个传感器集合而成,各传感器采集数据相对独立,集成安装后获取点云精度质量通常难以控制。针对这一问题,提出了一种基于最小二乘平差原理的特征点检校方法,结合空间配准算法构建推导平差模型,求解误差参数。通过多源传感器数据融合配准,对加入误差改正数后的成果点云质量比较分析。实验结果表明,这种检校方法能够达到提升点云模型精度的目的。

关键词：移动激光雷达精度最小二乘平差检校误差模型

Flutter analyses of complete aircraft based on hybrid grids and parallel computing

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Science China(Technological Sciences) 2013年第2期56卷 398-404页

作者： ZHENG guannan YANG Guowei QIAN wei Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of Mechanics Chinese Academy of Sciences Shenyang Aircraft Design and Research Institute

A tightly coupled method was developed to analyse aeroelasticity by constructing subiterative schemes for fluid and structural equations of motion,*** MPI partition parallel computing,the fluid was solved by Navier-Stokes equations based on hybrid grids.A new unstructured background grid deformtion method was used for the CFD grid *** transonic flutter wind tunnel model of a complete aircraft was simulated to validate the developed *** flutter characteristics of the aircraft was analysed and compared with the test *** indicates that the devoloped method has a relatively higher precision and can be used for aeronautical engineering application.

关键词： CFD CSD aeroelasticity coupled method flutter MPI

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煤矿副井矿车装载物智能识别方法

工矿自动化 2022年第4期48卷 14-19,30页

作者：靳舒凯魏冠楠王春明王统海吴忠伦杨克虎中国矿业大学(北京)机电与信息工程学院北京100083 临沂矿业集团菏泽煤电有限公司山东菏泽274700 临沂矿业集团菏泽煤电有限公司郭屯煤矿山东菏泽274700 中国矿业大学(北京)煤矿智能化与机器人创新应用应急管理部重点实验室北京100083

基于卷积神经网络实现煤矿副井矿车装载物自动分类在实际应用中因触发条件简易导致误判与漏判情况,且非矿车物体经过检测区域时会引起司控道岔误动作。针对该问题,提出了基于目标检测模型的煤矿副井矿车装载物智能识别方法。在煤矿副井... 详细信息

基于卷积神经网络实现煤矿副井矿车装载物自动分类在实际应用中因触发条件简易导致误判与漏判情况,且非矿车物体经过检测区域时会引起司控道岔误动作。针对该问题,提出了基于目标检测模型的煤矿副井矿车装载物智能识别方法。在煤矿副井井口安装工业相机采集矿车装载物图像并进行人工标注,构建矿车识别数据集,对Faster R-CNN,YOLOv4,SSD 3种目标检测模型的识别准确率与实时性进行评估,根据评估结果,得出YOLOv4模型更适用于矿车装载物识别任务的结论;为降低模型大小,提高识别速度,对YOLOv4模型进行改进,采用轻量级网络MobileNet替换原有主干特征提取网络CSPDarknet53,构建MobileNetv3-YOLOv4模型,测试结果表明MobileNetv3-YOLOv4模型的平均精度均值(mAP)为95.03%,识别速度为44帧/s,较YOLOv4模型分别提高了0.77%,27帧/s;为方便现场应用和部署,提高矿车装载物识别模型在嵌入式平台上的性能,提出了基于层间融合和模型量化的模型加速方法,并将加速前后的MobileNetv3-YOLOv4模型移植到Jetson TX2进行矿车装载物识别现场试验,结果表明识别速度由MobileNetv3-YOLOv4模型加速前的18.3帧/s提升至35.42帧/s,mAP为94.68%,满足现场实时、精确检测需求,且仅在矿车经过检测区域时启动检测任务,避免了因其他物体引起的司控道岔误动作现象。

关键词：煤矿智能化副井轨道分运矿车装载物识别目标检测模型 YOLOv4 模型加速