检索结果-南通市图书馆

Non-invasive respiratory support for patients with novel coronavirus pneumonia:clinical efficacy and reduction in risk of infection transmission

引用

Chinese Medical Journal 2020年第9期133卷 1109-1111页

作者： Jin-Gen Xia Jian-Ping Zhao zhen-shun cheng Yi Hu Jun Duan Qing-Yuan Zhan Department of Pulmonary and Critical Care Medicine National Clinical Research Center for Respiratory DiseasesChina-Japan Friendship HospitalBeijing 100029China Department of Pulmonary and Critical Care Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430030China Department of Pulmonary and Critical Care Medicine Zhongnan Hospital of Wuhan UniversityWuhanHubei 430071China Department of Pulmonary and Critical Care Medicine The Central Hospital of WuhanWuhanHubei 430030China Department of Surgical Intensive Care Unit China-Japan Friendship HospitalBeijing 100029China

Introduction Pneumonia caused by a novel coronavirus known as 2019 novel coronavirus disease(COVID-19)[1]appeared in Wuhan,China in December 2019,and approximately 15%to 30%of patients developed acute respiratory distress syndrome within a short period of time.[2,3]To reduce respiratory symptoms and improve prognosis,respiratory support is the most important means of life support,[1]and non-invasive respiratory support systems,[2]including various conventional oxygen therapies,non-invasive positive pressure ventilation(NPPV),and high-flow nasal cannula(HFNC),are most commonly ***,their efficacy and safety remain unclear,and whether they increase the risk of aerosol dispersion and disease transmission is particularly controversial.[4,5]Given that there are many similarities between COVID-19 pneumonia and severe acute respiratory syndrome(SARS)and Middle East respiratory syndrome(MERS),[6]this study primarily discusses clinical indications and provides details regarding the prevention of nosocomial infections during NPPV and HFNC treatment of COVID-19 pneumonia based on previous clinical data on the use of these two therapies for SARS and MERS and our experience with the treatment of COVID-19 pneumonia.

关键词： respiratory pneumonia clinical

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Time and risk factors of viral clearance in COVID-19 patients

引用

Chinese Medical Journal 2021年第17期134卷 2131-2133页

作者： Chao-Jie Wei Xing-Xing Hu Guang-Ming Ye Jian-Ming Yang zhen-shun cheng Xing-Huan Wang Department of Pulmonary and Critical Care Medicine Zhongnan Hospital of Wuhan UniversityWuhanHubei 430071China Wuhan Research Center for Infectious Diseases and Cancer Chinese Academy of Medical SciencesWuhanHubei 430071China Department of Laboratory Medicine Zhongnan Hospital of Wuhan UniversityWuhanHubei 430071China Department of Respiratory Medicine Wuxue No.1 People’s HospitalWuxueHubei435401China Department of Urology Zhongnan Hospital of Wuhan UniversityWuhanHubei 430071China

To the Editor:Coronavirus disease 2019(COVID-19)has become a global *** minimize the risk of viral transmission in the community,some countries require two negative results of reverse transcription polymerase chain reaction(RT-PCR)for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)RNA on nasopharyngeal swabs collected≥24 h apart for hospital discharge and discontinuation of ***,understanding the time of viral clearance is ***,there are limited data reporting the viral clearance time and its risk factors in COVID-19 patients.[1,2]Moreover,the numbers of patients were limited and the risk factors of viral clearance were inconsistent in these ***,we aim to determine the time and risk factors of viral clearance in throat swabs in COVID-19 patients.

关键词： patients acute respiratory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rational Schur Superalgebras

引用

Algebra Colloquium 2024年第2期31卷 209-220页

作者： Andrew Riesen shun-Jen cheng Department of Mathematical and Statistical Sciences University of Alberta 1132489 Ave NWEdmontonAlbertaCanada 不详

We develop and study the generalization of rational Schur algebras to the super *** to the classical case,this provides a new method for studying rational supermodules of the general linear supergroup GL(m|n).Furthermore,we establish a Schur-Weyl duality result for rational Schur superalgebras and conclude that under certain conditions these objects will be semisimple.

关键词： Schur algebra supermathematics general linear supergroup

来源：

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

Unified Classification and Rejection:A One-versus-all Framework

引用

Machine Intelligence Research 2024年第5期21卷 870-887页

作者： zhen cheng Xu-Yao Zhang cheng-Lin Liu State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing100049China

Classifying patterns of known classes and rejecting ambiguous and novel(also called as out-of-distribution(OOD))inputs are involved in open world pattern *** neural network models usually excel in closed-set classification while perform poorly in rejecting OOD *** tackle this problem,numerous methods have been designed to perform open set recognition(OSR)or OOD rejection/detection *** methods mostly take post-training score transformation or hybrid models to ensure low scores on OOD inputs while separating known *** this paper,we attempt to build a unified framework for building open set classifiers for both classification and OOD *** formulate the open set recognition of K-known-class as a(K+1)-class classification problem with model trained on known-class samples *** decomposing the K-class problem into K one-versus-all(OVA)binary classification tasks and binding some parameters,we show that combining the scores of OVA classifiers can give(K+1)-class posterior probabilities,which enables classification and OOD rejection in a unified *** maintain the closed-set classification accuracy of the OVA trained classifier,we propose a hybrid training strategy combining OVA loss and multi-class cross-entropy *** implement the OVA framework and hybrid training strategy on the recently proposed convolutional prototype network and prototype classifier on vision transformer(ViT)*** on popular OSR and OOD detection datasets demonstrate that the proposed framework,using a single multi-class classifier,yields competitive performance in closed-set classification,OOD detection,and misclassification *** code is available at https://***/zhen-cheng121/CPN_OVA_unified.

关键词： Open set recognition out-of-distribution detection misclassification detection convolutional prototype network oneversus-all Dempster-Shafer theory of evidence

来源：

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

Perceived infection transmission routes, infection control practices, psychosocial changes, and management of COVID-19 infected healthcare workers in a tertiary acute care hospital in Wuhan: a cross-sectional survey

引用

Military Medical Research 2020年第4期7卷 418-429页

作者： Ying-Hui Jin Qiao Huang Yun-Yun Wang Xian-Tao Zeng Li-Sha Luo zhen-Yu Pan Yu-Feng Yuan Zhi-Min Chen zhen-shun cheng Xing Huang Na Wang Bing-Hui Li Hao Zi Ming-Juan Zhao Lin-Lu Ma Tong Deng Ying Wang Xing-Huan Wang Center for Evidence-Based and Translational Medicine Zhongnan Hospital of Wuhan University169 Donghu RoadWuchang DistrictWuhan 430071HubeiChina Department of Evidence-Based Medicine and Clinical Epidemiology The Second Clinical CollegeWuhan UniversityWuhan 430071HubeiChina Division of Medical Affairs Zhongnan Hospital of Wuhan UniversityWuhan 430071HubeiChina Department of Hepatopancreatobiliary Surgery Zhongnan Hospital of Wuhan UniversityWuhan 430071HubeiChina Division of Social and Medical Development Zhongnan Hospital of Wuhan UniversityWuhan 430071HubeiChina Department of Respiratory Medicine Zhongnan Hospital of Wuhan UniversityWuhan 430071HubeiChina School of Nursing and Health Henan UniversityKaifeng 475000HenanChina Institute of Evidence-Based Medicine and Knowledge Translation Henan UniversityKaifeng 475000HenanChina Department of Infectious Diseases Zhongnan Hospital of Wuhan UniversityWuhan 430071HubeiChina Leishenshan Hospital in Wuhan Wuhan 430200HubeiChina

Background:Many healthcare workers were infected by coronavirus disease 2019(COVID-19)early in the epidemic posing a big challenge for epidemic ***,this study aims to explore perceived infection routes,influencing factors,psychosocial changes,and management procedures for COVID-19 infected healthcare ***:This is a cross-sectional,single hospital-based *** recruited all 105 confirmed COVID-19 healthcare workers in the Zhongnan Hospital of Wuhan University from February 15 to 29,*** participants completed a validated *** consent was obtained from all *** causes of infection,infection prevention,control knowledge and behaviour,psychological changes,symptoms and treatment were ***:Finally,103 professional staff with COVID-19 finished the questionnaire and was included(response rate:98.1%).Of them,87 cases(84.5%)thought they were infected in working environment in hospital,one(1.0%)thought their infection was due to the laboratory environment,and 5(4.9%)thought they were infected in daily life or community *** of throat collection and physical examination were the procedures perceived as most likely causing their infection by nurses and doctors ***-three(41.8%)thought their infection was related to protective equipment,utilization of common equipment(masks and gloves).The top three first symptoms displayed before diagnosis were fever(41.8%),lethargy(33.0%)and muscle aches(30.1%).After diagnosis,88.3%staff experienced psychological stress or emotional changes during their isolation period,only 11.7%had almost no emotional ***(Umifenovir;an anti-influza drug;69.2%)was the drug most commonly used to target infection in mild and moderate ***:The main perceived mode of transmission was not maintaining protection when working at a close distance and having intimate contact with infected *** psychological intervention is necessa

关键词： COVID-19 SARS-CoV-2,2019-nCoV Healthcare worker Healthcare professional Infection transmission route Psychosocial status

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Novel process for facile preparation of mesoporous silica-based materials with controllable pore structure from coal fly ash Author links open overlay panel

引用

Particuology 2024年第8期91卷 128-137页

作者： Jian-ming Gao zhen Li Shujia Ma Yuanyuan Zhang Fangqin cheng Institute of Resources and Environment Engineering State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste ResourcesShanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related WastesShanxi UniversityTaiyuan 030006China

Extraction of silica from fly ash to produce mesoporous silica materials is one of the most important utilization *** silica could not be synthesized on a large-scale by conventional sol-gel *** this paper,facile preparation of mesoporous silica with controllable pore structure from fly ash by the template-free process via two steps of mineral phase transformation and selective acid etching was *** influence of crystalline structure and acid etching degree on structure of as-synthesized mesoporous silica materials was revealed,as well as mechanism of crystalline structure transformation and pore structure *** results show that mullite and quartz could be transformed into acid-soluble kaliophilite when fly ash reacted with K_(2)CO_(3)at temperature of 800-1100℃.The hexagonal kaliophilite would be transformed into orthorhombic KAlSiO_(4)-O1 phase when the temperature is controlled at 1100℃.Mesoporous silica with specific surface area of 475.93 m^(2)/g and 642.57 m^(2)/g could be synthesized from activated fly ash with kaliophilite and KAlSiO_(4)-O1 phase crystalline *** controlling the degree of acid etching,mesoporous silica materials with different pore structures can be *** paper provides a cost-effective and large-scale process for the preparation of mesoporous silica materials with controllable pore structure from solid waste fly ash.

关键词： Fly ash Mesoporous silica Crystal transformation Acid etching Controllable pore structure

来源：

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

City Network Evolution Characteristics of Smart Industry: Evidence from Yangtze River Delta, China

引用

Chinese Geographical Science 2024年第5期34卷 829-848页

作者： SHEN Lizhen ZHONG Zhaocheng CHEN cheng ZHANG Shanqi zhen Feng School of Architecture and Urban Planning Nanjing UniversityNanjing 210093China Hefei Urban Planning&Design Institute Hefei 230041China

The dual-path model of industrial evolution and spatial progression has been widely acknowledged and incorporated into the strategic planning to promote the development of urban industries and regional ***,current research on inter-enter-prise city networks mainly focuses on the single sector of flows on all enterprise branches,such as product value chains and production factors,but neglects that of particular industry *** upon the new economic geography and city networks theory,this paper develops a methodological framework that focuses on the analysis of city network evolution characteristics of smart ***-larly,a conceptual model of smart industry enterprise-industry-city is proposed and then applied to a case study of smart industry in the Yangtze River Delta Region,*** enterprise supplier-customer data,a city network of smart industry is constructed and sub-sequently analyzed with the proposed *** indicate that the smart industry network in Yangtze River Delta Region exhibits a hierarchical structure and the expansion of the network presents a small-world network *** study not only makes a meth-odological contribution for revealing the industrial and spatial evolution path of the current smart industry,but also provides empirical support for the formulation of new economic development policies focused on smart industries,demonstrating the role of city clusters as carriers of regional synergistic development.

关键词： smart industry city networks social network analysis methodological framework Yangtze River Delta,China

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Conceptual design of a 714-MHz RFQ for compact proton injectors and development of a new tuning algorithm on its aluminium prototype

引用

Nuclear Science and Techniques 2024年第1期35卷 45-58页

作者： Yi-Xing Lu Wen-cheng Fang Yu-Sen Guo zhen-Tang Zhao Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800China University of Chinese Academy of Sciences Beijing 101408China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204China Shanghai Key Laboratory of Cryogenics&Superconducting RF Technology Shanghai 201800China ShanghaiTech University Shanghai 201210China

Radio frequency quadrupoles(RFQs),which are crucial components of proton injectors,significantly affect the performance of proton accelerator *** RFQ with a high frequency of 714 MHz dedicated to compact proton injectors for medi-cal applications is designed in this *** RFQ is designed to accelerate proton beams from 50 keV to 4 MeV within a short length of 2 m and can be matched closely with the downstream drift tube linac to capture more particles through a preliminary *** develop an advanced RFQ,challenging techniques,including fabrication and tuning method,must be evaluated and verified using a *** aluminium prototype is derived from the conceptual design of the RFQ and then redesigned to confirm the radio frequency performance,fabrication procedure,and feasibility of the tuning ***,a new tuning algorithm based on the response matrix and least-squares method is developed,which yields favorable results based on the prototype,i.e.,the errors of the dipole and quadrupole components reduced to a low level after several tuning *** from the conceptual design and techniques obtained from the prototype,the formal mechanical design of the 2-m RFQ is ready for the next manufacturing step.

关键词： Compact proton injector RFQ IH-DTL High gradient Tuning

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

One-year observation of the mixing states of oxygenated organics-containing single particles in Guangzhou,China

引用

Frontiers of Environmental Science & Engineering 2024年第5期18卷 155-169页

作者： Liyuan Mao Suxia Yang Xiaoya cheng Sulin Liu Duanying Chen zhen Zhou Mei Li chenglei Pei Chunlei cheng Institute of Mass Spectrometry and Atmospheric Environment Guangdong Provincial Engineering Research Center for the On-line Source Apportionment System of Air PollutionJinan UniversityGuangzhou510632China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou510632China Guangzhou Research Institute of Environment Protection Co. Ltd.Guangzhou510620China Guangzhou Ecological and Environmental Monitoring Center of Guangdong Province Guangzhou510030China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou570228China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy SciencesXi’an710061China

Oxygenated organic molecules(OOMs)play an important role in the formation of secondary organic aerosols(SOAs),but the mixing states of OOMs are still *** study investigates the mixing states of OOM-containing single particles from the measurements taken using a single particle aerosol mass spectrometer in Guangzhou,China in ***,the particle counts of OOM particles and the mass concentration of secondary organic carbon(SOC)exhibited similar temporal trends throughout the entire *** OOM particles were consistently enriched in secondary ions,including ^(16)O^(−),^(26)CN^(−),^(46)NO_(2)^(−),^(62)NO_(3)^(−),and ^(97)HSO_(4)^(−).In contrast,the number fractions and diurnal patterns of OOM particles among the total detected particles showed similar distributions in August and October;however,the SOC ratios in fine particulate matter were quite different,suggesting that there were different mixing states of single-particle oxygenated *** addition,further classification results indicated that the OOM particles were more aged in October than August,even though the SOC ratios were higher in ***,the distribution of hydrocarbon fragments exhibited a notable decrease from January to October,emphasizing the more aged state of the organics in *** addition,the sharp increase in elemental carbon(EC)-OOM particles in the afternoon in October suggests the potential role of EC in the aging process of ***,in contrast to the bulk analysis of SOC mass concentration,the mixing states of the OOM particles provide insights into the formation process of SOAs in field studies.

关键词： Oxygenated organics Single particles Mixing state Secondary formation Photochemistry

来源：

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

Mucosal immune responses to Ichthyophthirius multifiliis in the ocular mucosa of rainbow trout(Oncorhynchus mykiss,Walbaum),an ancient teleost fish

引用

Marine Life Science & Technology 2024年第2期6卷 266-279页

作者： Weiguang Kong Guangyi Ding Gaofeng cheng Peng Yang zhen Xu Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China Department of Aquatic Animal Medicine College of FisheriesHuazhong Agricultural UniversityWuhan 430070China

The eye,as a specialized visual organ,is directly exposed to the external environment,and,therefore,it faces constant chal-lenges from external pathogenic organisms and *** the ocular mucosa(OM)of mammals,mucosal-associated lymphoid tissues(MALTs)constitute the primary line of ***,the immune defense role of the OM remains unknown in aquatic *** gain insights into the immune processes within the OM of teleost fish,we developed an infection model of rainbow trout(Oncorhynchus mykiss)OM using a parasite,Ichthyophthirius multifiliis(Ich).Immunofluorescence,qPCR,and H&E staining revealed that Ich successfully infiltrates the OM of rainbow trout,leading to pathological struc-tural changes,as evidenced by A&B ***,the qPCR results indicate an up-regulation of immune-related genes following Ich infection in the ***,transcriptome analyses were conducted to detect immune responses and impairments in eye function within the OM of rainbow trout with Ich *** results of the transcriptome analysis that Ich infection can cause an extensive immune response in the OM,ultimately affecting ocular *** the best of our knowledge,our findings represent for the first time that the teleost OM could act as an invasion site for parasites and trigger a strong mucosal immune response to parasitic infection.

关键词： Ocular mucosa Mucosal immunity Transcriptome analysis Oncorhynchus mykiss Ichthyophthirius multifiliis

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：