检索结果-南通市图书馆

On the selection of solutions for mutation in differential evolution

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2018年第2期12卷 297-315页

作者： Yong WANG Zhi-Zhong LIU Jianbin LI Han-Xiong LI jiahai WANG School of Information Science and Engineering Central South University Changsha 410083 China School of Computer Science and Informatics De Montfort University Leicester LE1 9BH UK Institute of Information Security and Big Data Central South University Changsha 410083 China Department of Systems Engineering and Engineering Management City University of Hong Kong Hong Kong China State Key Laboratory of High Performance Complex Manufacturing Central South University Changsha 410083 China School of Data and Computer Science Sun Yat-sen University Guangzhou 510006 China

Differential evolution （DE） is a kind of evolutionary algorithms, which is suitable for solving complex optimization problems. Mutation is a crucial step in DE that generates new solutions from old ones. It was argued and has been commonly adopted in DE that the solutions selected for mutation should have mutually different indices. This restrained condition, however, has not been verified either theoretically or empirically yet. In this paper, we empirically investigate the selection of solutions for mutation in DE. From the observation of the extensive experiments, we suggest that the restrained condition could be relaxed for some classical DE versions as well as some advanced DE variants. Moreover, relaxing the restrained condition may also be useful in designing better future DE algorithms.

关键词： differential evolution mutation the selection of solutions for mutation evolutionary algorithms

Supported noble metal nanoparticles as photo/sono-catalysts for synthesis of chemicals and degradation of pollutants

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2011年第6期54卷 887-897页

作者： WEN Bo MA jiahai CHEN ChunCheng MA WanHong ZHU HuaiYong ZHAO JinCai Beijing National Laboratory for Molecular Sciences Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China College of Chemistry and Chemical Engineering Graduate UniversiO of Chinese Academy of Sciences Beijing 100049 China Chemistry Discipline Queensland University of Technology Brisbane Qld 4001 Australia

This review summarizes the utilization of supported noble metal nanoparticles (such as Au/TiO2, Au/ZrO2, Ag/AgCl) as efficient photo/sono-catalysts for the selective synthesis of chemicals and degradation of environmental pollutants. Supported noble metal nanoparticles could efficiently catalyze the conversion of solar energy into chemical energy. Under UV/visible light irradiation, important chemical transformations such as the oxidation of alcohols to carbonyl compounds, the oxidation of thiol to disulfide, the oxidation of benzene to phenol, and the reduction of nitroaromatic compounds to form aromatic azo compounds, are effectively achieved by supported noble metal nanoparticles. Under ultrasound irradiation, supported noble metal nanoparticles could efficiently catalyze the production of hydrogen from water. Moreover, various pollutants, including aldehydes, alcohols, acids, phenolic compounds, and dyes, can be effectively decomposed over supported noble metal nanoparticles under UV/visible light irradiation. Under ultrasound irradiation, pollutant molecules can also be completely degraded with supported noble metal nanoparticles as catalysts.

关键词： noble metal nanoparticles photocatalyst sonocatalyst

MobileNetV3-CenterNet:A Target Recognition Method for Avoiding Missed Detection Effectively Based on a Lightweight Network

在线全文

学校读者我要写书评

暂无评论

Journal of Beijing Institute of Technology 2023年第1期32卷 82-94页

作者： Yajing Li Xiaoyan Xiong Wenbin Xin jiahai Huang Huimin Hao School of Taiyuan University of Technology Taiyuan 030000China

To solve the problems in online target detection on the embedded platform,such as high missed detection rate,low accuracy,and slow speed,a lightweight target recognition method of MobileNetV3-CenterNet is *** method combines the anchor-free Centernet network with the MobileNetV3 small network and is trained on the University at Albany Detection and Tracking(UA-DETRAC)and the Pattern Analysis,Statical Modeling and Computational Learn-ing Visual Object Classes(PASCAL VOC)07+12 standard *** reducing the scale of the network model,the MobileNetV3-CenterNet model shows a good balance in the accuracy and speed of target recognition and effectively solves the problems of missing detection of dense and small targets in online *** verify the recognition performance of the model,it is tested on 2683 images of the UA-DETRAC and PASCAL VOC 07+12 datasets,and compared with the analysis results of CenterNet-Deep Layer Aggregation(DLA)34,CenterNet-Residual Network(ResNet)18,CenterNet-MobileNetV3-large,You Only Look Once vision 3(YOLOv3),MobileNetV2-YOLOv3,Single Shot Multibox Detector(SSD),MobileNetV2-SSD and Faster region convolutional neural network(RCNN)*** results show that the MobileNetV3-CenterNet model accurately rec-ognized the dense targets and small targets missed by other methods,and obtained a recognition accuracy of 99.4%with a running speed at 53(on a server)and 14(on an ipad)frame/s,*** MobileNetV3-CenterNet lightweight target recognition method will provide effective technical support for the target recognition of deep learning networks in embedded platforms and online detection.

关键词： target detection MobileNetV3 CenterNet lightweight

在线全文

学校读者我要写书评

暂无评论

山西省秋季降水的时空变化特征及成因分析

高原气象 2024年第5期43卷 1207-1215页

作者：王晓琼张冬峰王大勇张国宏闫加海陈颖山西省气候中心山西太原030006

利用山西省1961-2021年秋季降水资料、NCEP/NCAR再分析资料和海温资料,分析山西省秋季降水的时空变化特征。结果表明:山西省秋季降水在20世纪70年代中期前偏多,之后减少,21世纪00年代中期又开始增多。进一步从大气环流角度探讨这种年代... 详细信息

利用山西省1961-2021年秋季降水资料、NCEP/NCAR再分析资料和海温资料,分析山西省秋季降水的时空变化特征。结果表明:山西省秋季降水在20世纪70年代中期前偏多,之后减少,21世纪00年代中期又开始增多。进一步从大气环流角度探讨这种年代际变化的成因可知,在降水偏多时期,200 hPa纬向风场东亚西风急流位置偏北,有利于山西地区上升运动增强;500 hPa位势高度场上欧亚大陆上空呈现出显著的正-负-正异常分布,有利于高纬冷空气向南爆发;850 hPa风场有利于低纬水汽向山西输送,在这样的高低空环流配置下,有利于山西省降水增加。同时山西省秋季降水量与海温异常存在密切关系,当前期3-5月北太平洋中部海温偏高,热带中东太平洋海温偏低时,山西省南部秋季降水易偏多。

关键词：秋季降水时空变化特征大气环流海温异常山西省

张量成像在丁苯酞氯化钠治疗脑梗死患者认知功能评估中的应用价值

在线全文

学校读者我要写书评

暂无评论

河北医药 2024年第11期46卷 1682-1685页

作者：李娟吴艳峰薛嘉海段凯强河北省张家口市第一医院急诊科 075000 河北省张家口市第一医院放射医学科 075000

目的探讨磁共振弥散张量成像(DTI)在丁苯酞氯化钠治疗脑梗死患者认知功能评估中的临床应用效果。方法选择2021年1月至2022年12月收治的40例脑梗死患者,根据随机数表法将其分为甲组和乙组,每组20例。2组均予以常规对症治疗,甲组在此基础... 详细信息

目的探讨磁共振弥散张量成像(DTI)在丁苯酞氯化钠治疗脑梗死患者认知功能评估中的临床应用效果。方法选择2021年1月至2022年12月收治的40例脑梗死患者,根据随机数表法将其分为甲组和乙组,每组20例。2组均予以常规对症治疗,甲组在此基础上予以重组组织型纤溶酶原激活物(rt-PA)静脉溶栓治疗,乙组在甲组基础上行丁苯酞氯化钠治疗。2组治疗前、后均对其开展DTI检查。观察2组疗效、纤溶指标、神经功能缺损情况、认知功能水平及DTI检查结果。结果乙组临床疗效优于甲组,差异有统计学意义(P<0.05);2组治疗后血清D-二聚体(D-D)水平、血浆1型纤维蛋白溶解酶原激活抑制剂(PAI-1)水平及血浆纤维蛋白原(FIB)水平均较治疗前下降,且乙组低于甲组,差异有统计学意义(P<0.05);2组治疗后美国国立卫生研究院卒中量表(NIHSS)评分均低于治疗前,蒙特利尔认知评估量表(MoCA)评分均高于治疗前,且乙组NIHSS评分低于甲组,MoCA评分高于甲组,差异有统计学意义(P<0.05);2组治疗后DTI检查各向异性(FA)值均较治疗前提高,且乙组高于甲组,差异有统计学意义(P<0.05)。结论rt-PA静脉溶栓联合丁苯酞氯化钠辅助治疗脑梗死疗效确切,有助于改善患者神经功能及认知功能,通过DTI检查可有效评估患者认知功能变化,对预测患者预后有积极作用。

关键词：磁共振弥散张量成像丁苯酞氯化钠脑梗死认知功能

钠-葡萄糖协同转运蛋白2抑制剂辅助治疗急性冠状动脉综合征临床观察

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

中国药业 2024年第15期33卷 87-91页

作者：李家海石林曾凡鹏吴杨武广西壮族自治区钦州市第一人民医院广西钦州535000

目的探讨钠-葡萄糖协同转运蛋白2(SGLT2)抑制剂辅助治疗急性冠状动脉综合征(ACS)的临床疗效。方法选取医院2020年8月至2021年8月收治的ACS患者120例,按随机数字表法分为观察组和对照组,各60例。两组患者均予常规治疗,观察组患者加用SG... 详细信息

目的探讨钠-葡萄糖协同转运蛋白2(SGLT2)抑制剂辅助治疗急性冠状动脉综合征(ACS)的临床疗效。方法选取医院2020年8月至2021年8月收治的ACS患者120例,按随机数字表法分为观察组和对照组,各60例。两组患者均予常规治疗,观察组患者加用SGLT2抑制剂恩格列净或达格列净,均连续治疗12个月。结果观察组总有效率为91.67%,显著高于对照组的78.33%(P <0.05)。治疗1个月、6个月后,两组患者的心功能指标左室舒张末期容积、左室收缩末期容积均显著降低(P <0.05),左室射血分数显著升高(P <0.05),且观察组上述指标改善程度均显著优于对照组(P <0.05);两组患者的炎性因子超敏C反应蛋白、白细胞介素6、肿瘤坏死因子-α水平均显著降低(P <0.05),且观察组均显著低于对照组(P <0.05);观察组患者的左室重构指标可溶性生长刺激表达基因2蛋白、Ⅰ型前胶原羧基端肽、Ⅰ型C端胶原前肽均显著低于对照组(P <0.05)。治疗1个月后,两组患者的心肌酶谱乳酸脱氢酶、肌酸激酶同工酶、肌酸激酶水平均显著降低(P <0.05),且观察组均显著低于对照组(P <0.05)。观察组患者的主要心血管不良事件(MACE)发生率为6.67%,显著低于对照组的20.00%(P <0.05)。结论 SGLT2抑制剂辅助治疗ACS的临床疗效良好,可有效改善患者的心功能,减轻心肌损伤及机体炎症,逆转心室重构,降低MACE发生率。

关键词：钠-葡萄糖协同转运蛋白2抑制剂急性冠状动脉综合征心功能左室重构临床疗效

A One Health strategy for emerging infectious diseases based on the COVID-19 outbreak

在线全文

学校读者我要写书评

暂无评论

Journal of Biosafety and Biosecurity 2022年第1期4卷 5-11页

作者： Qin Wu Qianlin Li jiahai Lu School of Public Health Sun Yat-sen UniversityGuangzhouChina Key Laboratory for Tropical Disease Control Sun Yat-sen UniversityMinistry of EducationGuangzhouChina One Health Center of Excellence for Research and Training GuangzhouChina State Key Laboratory for Surveillance and Evaluation of Vaccines and Biological Products GuangzhouChina

Coronavirus disease 2019(COVID-19)is as an emerging infectious disease(EID)that has caused the worst public health catastrophe of the 21st century thus *** terms of impact,the COVID-19 pandemic is second only to the Spanish Flu pandemic of 1918 in modern world *** of 7 September 2021,there have been 220 million confirmed cases of COVID-19 and more than 4.5 million *** pose serious public health and socio-economic risks,and 70%of EIDs originate from *** development of EIDs such as COVID-19 is a pressing ***,taking the COVID-19 pandemic as an example,we illustrate the disastrous effects of EIDs and assess their emergence and evolution from a One Health *** propose a One Health strategy,centered on‘moving the gates forward’,for EID prevention and control at the human-animal-environment *** strategy may be instructive and provide early warnings of EIDs in the future.

关键词： COVID-19 Emerging infectious diseases Zoonotic One Health Human-animal-environment interface Early warning

Structural insight into EV-A713A protein and its interaction with a peptide inhibitor

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Virologica Sinica 2023年第6期38卷 975-979页

作者： Yahui Liu Panjing Lv Wei Wang jiahai Zhang Xi Zhou yang Qiu Kun Cai Haoran Zhang Yuan Fang Yan Li Department of Pathogen Biology School of Basic MedicineTongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious DiseasesHuazhong University of Science and TechnologyWuhan430030China Medical Subcenter of HUST Analytical&Testing Center Huazhong University of Science and TechnologyWuhan430030China MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics School of Life SciencesDivision of Life Sciences and MedicineUniversity of Science and Technology of Chin1Hefei230027China State Key Laboratory of Virology Wuhan Institute of VirologyChinese Academy of SciencesWuhan430071China Institute of Health Inspection and Testing Hubei Provincial Center for Disease Control and Prevention(Hubei CDC)Wuhan430079China Department of Pediatrics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

Dear Editor,Hand,foot,and mouth disease(HFMD)is a common illness among children that is usually mild and ***,in some severe cases,patients may rapidly develop neurological and systemic complications that can be fatal(Ooi et al.,2010).HFMD is caused by a few serotypes of human enterovirus A(HEV-A)species(Yu and Cowling,2019),with enterovirus A71(EV-A71)and coxsackievirus A16(CV-A16)being the most typical causative agents(Yu and Cowling,2019).Furthermore,severe neurological sequelae are more common in cases with EV-A71 serotype infection than other serotypes(Ooi et al.,2010;Yu and Cowling,2019).There has been a significant increase in EV-A71 epidemic activity throughout the Asia–Pacific region(McMinn,2002)since EV-A71 was first isolated from a patient with central nervous system(CNS)disease in 1969(Schmidt et al.,1974).EV-A71 is a small non-enveloped virus belonging to HEV-A species of the genus Enterovirus in the family Picornaviridae(Nasri et al.,2007).Its genome is a single-stranded positive-sense RNA of approximately 7400 bp in length and contains only one complete open reading frame(ORF),which encodes a large polyprotein(Solomon et al.,2010).

关键词： enterovirus insight

利用工业固废料制备低密度多孔陶瓷及其性能研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

陶瓷 2024年第8期 35-39,82页

作者：张国涛董诚白佳海李媛媛山东理工大学材料科学与工程学院山东淄博255049 广东金意陶陶瓷集团有限公司广东佛山528031 广东金绿能科技有限公司广东佛山528031 景德镇金绿能新材料科技有限公司江西景德镇333400 武汉科技大学分析测试中心武汉430080

笔者以煤矸石、陶瓷抛光渣和建筑基坑土渣为主要原料,碳化硅为发泡剂,锂辉石尾矿、镁质土渣和微晶玻璃尾料为外加料,采用高温发泡法成功制备了高强、低体积密度的多孔陶瓷,探索了最佳烧成工艺。通过TG-DSC、XRD、SEM等检测对多孔陶瓷进... 详细信息

笔者以煤矸石、陶瓷抛光渣和建筑基坑土渣为主要原料,碳化硅为发泡剂,锂辉石尾矿、镁质土渣和微晶玻璃尾料为外加料,采用高温发泡法成功制备了高强、低体积密度的多孔陶瓷,探索了最佳烧成工艺。通过TG-DSC、XRD、SEM等检测对多孔陶瓷进行了表征,并测试其体积密度和抗压强度。结果表明:试样的最佳烧成温度为1150℃,最佳保温时间为50 min,在最佳温度制度条件下,样品的体积密度为416 kg/m^(3),抗压强度为5.5 MPa,多孔陶瓷的主晶相为石英、堇青石和莫来石。

关键词：多孔陶瓷工业固废粉煤灰抗压强度

维普期刊数据库博看期刊