检索结果-南通市图书馆

Reliability Design for Impact Vibration of Hydraulic Pressure Pipeline Systems

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2013年第5期26卷 1050-1055页

作者： zhang tianxiao LIU Xinhui College of Mechanical Science and Engineering Jilin University

The research of reliability design for impact vibration of hydraulic pressure pipeline systems is still in the primary stage,and the research of quantitative reliability of hydraulic components and system is still *** the condition of having obtained the numerical characteristics of basic random parameters,several techniques and methods including the probability statistical theory,hydraulic technique and stochastic perturbation method are employed to carry out the reliability design for impact vibration of the hydraulic pressure *** the instantaneous pressure pulse of hydraulic impact in pipeline,the reliability analysis model of hydraulic pipeline system is established,and the reliability-based optimization design method is *** proposed method can reflect the inherent reliability of hydraulic pipe system exactly,and the desired result is *** reliability design of hydraulic pipeline system is achieved by computer programs and the reliability design information of hydraulic pipeline system is *** research proposes a reliability design method,which can solve the problem of the reliability-based optimization design for the hydraulic pressure system with impact vibration practically and effectively,and enhance the quantitative research on the reliability design of hydraulic pipeline *** proposed method has generality for the reliability optimization design of hydraulic pipeline system.

关键词： hydraulic pressure impact vibration systems probability perturbation method reliability design

建筑底层架空对行人高度处风环境及污染物扩散影响的数值模拟

在线全文

学校读者我要写书评

暂无评论

能源研究与信息 2024年第3期40卷 125-133页

作者：谢海英杨怡张天霄上海理工大学环境与建筑学院上海200093

在规则建筑群内,考虑建筑底层的架空设计,利用realizable k-ε紊流模型数值模拟了6种工况下的风场和污染物浓度场,并采用时均风速比M_(VR)、风速面积占比A_(RSi)和无量纲浓度K等指标对行人高度处的风环境和污染物浓度进行了评价。建筑... 详细信息

在规则建筑群内,考虑建筑底层的架空设计,利用realizable k-ε紊流模型数值模拟了6种工况下的风场和污染物浓度场,并采用时均风速比M_(VR)、风速面积占比A_(RSi)和无量纲浓度K等指标对行人高度处的风环境和污染物浓度进行了评价。建筑底层的架空设计能有效增加行人高度处的M_(VR),上游建筑的架空对M_(VR)的增加效果更显著。架空设计能减小低风速ARSi,增加中风速和中高风速A_(RSi),当建筑群中有2列及以上的建筑采用架空设计时,A_(RSi)的改善效果更好。当污染源位于建筑群上游地面时,架空设计对行人高度处的K分布影响不大,架空导致的回流使得污染物难以扩散至建筑群内,还会因其架空导致紧邻污染源的建筑迎风面行人高度处的K显著变小。

关键词：底层架空行人高度风环境污染物数值模拟

Variations in EXD3 caused congenital cataracts in three Chinese families

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2023年第3期10卷 660-663页

作者： Lihua Cao Yunji Leng Xinmiao Nie Shuyang Zhao tianxiao zhang College of Kinesiology Shenyang Sport UniversityShenyangLiaoning 110102China The Research Center for Medical Genomics China Medical UniversityShenyangLiaoning 110122China Department of Ophthalmology The Fourth Affiliated Hospital of China Medical UniversityKey Laboratory of Lens Research Liaoning ProvinceEye Hospital of China Medical UniversityShenyangLiaoning 110033China

Congenital cataract is a clinically and genetically heterogeneous disease characterized by any opacity of the lens presenting at birth or in the first year of life,with an incidence of 1–6/10,000 live births in developed countries and 5–15/10,000 live births in developing *** cataract accounts for 7.4%–15.5%of all childhood blindness,and it occurs as either a syndromic disease or an isolated(nonsyndromic)disease with or without other ocular malformations,such as microcornea.

关键词： birth cataract incidence

发热儿童的高热惊厥发生现状及其高危因素分析

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

中外医疗 2024年第11期43卷 13-16页

作者：董芳芳张天晓刘燕青广东省东莞市长安医院发热门诊广东东莞523850

目的探讨发热儿童的高热惊厥发生现状及其高危因素。方法方便选取2021年1月—2023年2月就诊于广东省东莞市长安医院发热门诊的2995例发热患儿为研究对象,经查阅患儿电子病历档案或询问患儿家长收集资料,调查发热儿童的高热惊厥发生现状... 详细信息

目的探讨发热儿童的高热惊厥发生现状及其高危因素。方法方便选取2021年1月—2023年2月就诊于广东省东莞市长安医院发热门诊的2995例发热患儿为研究对象,经查阅患儿电子病历档案或询问患儿家长收集资料,调查发热儿童的高热惊厥发生现状,并分析其发生的相关危险因素。结果2995例发热患儿中,发生高热惊厥120例(4.01%),未发生高热惊厥2875例(95.99%)。单因素分析显示,高热惊厥组年龄0.05);经Logistic回归分析显示,年龄(OR=20.080,95%CI:12.524~32.192)、性别(OR=1.796,95%CI:1.195~2.700)、初发温度(OR=6.976,95%CI:4.793~10.153)、发病季节(OR=2.046,95%CI:1.250~3.349)是发热儿童高热惊厥发生的高危因素,差异有统计学意义(P均<0.05)。结论发热儿童高热惊厥发生率较高,其发生与患儿年龄、性别、发病季节和初发温度密切相关,应结合上述危险因素制定预防措施,以降低高热惊厥发生率。

关键词：高热惊厥发热影响因素发病季节预后

维普期刊数据库博看期刊

从《中华小子》看中国题材动画的海外发行——动画导演张天晓访谈

在线全文

学校读者我要写书评

暂无评论

当代动画 2024年第1期 48-53页

作者：张天晓 [法]阿莉亚娜·施孙锐张博伦(整理) 上海今日动画影视文化有限公司美国芝加哥艺术学院北京电影学院中国动画研究院不详

2004年,张天晓导演携《中华小子》的两部时长共五分钟的样片参加法国戛纳秋季国际电视节,在全球738部动画片样片中浏览量排名第五,最终预售成交价格为4000万元人民币。其全球电视播映权被迪士尼和福克斯竞相争夺;拿下法国的2006年全年... 详细信息

2004年,张天晓导演携《中华小子》的两部时长共五分钟的样片参加法国戛纳秋季国际电视节,在全球738部动画片样片中浏览量排名第五,最终预售成交价格为4000万元人民币。其全球电视播映权被迪士尼和福克斯竞相争夺;拿下法国的2006年全年的收视冠军,在欧洲几乎所有国家播出都取得了极高的收视率;2007年10月,《中华小子》第一季26集在中央电视台首播,收视率达到5.77;2022年8月,《中华小子》高清重制版在多家网络平台上线,其重映的消息在B站、抖音多日热搜排名第一,据不完全统计,在爱奇艺、优酷、腾讯平台浏览量均超过500万次;其重置版三分钟宣传片在抖音发布一周的浏览量就达7400万次……《中华小子》是成功进行中华文化国际传播的经典动画文本,其思考、论证、策划、制作、发行等多环节的探索经验为中国动画走出去带来诸多启示。

关键词：迪士尼浏览量成交价格网络平台海外发行收视率宣传片

Effect of End Shape on Flow and Heat Transfer Characteristics of Two Parallel Plates

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第3期33卷 815-832页

作者： zhang Guang HONG tianxiao WANG Dongrui XIN Jialin TAO Junyu LIN Zhe Key Laboratory of Fluid Transmission Technology of Zhejiang Province Zhejiang Sci-Tech UniversityHangzhou310018China

Flow around a pair of flat plates is a basic hydrodynamics *** this paper,the flow and heat transfer characteristics of two parallel plates with different edge shapes are numerically *** different inclined angles,the influence of chamfered and rounded structures with different sizes at the end-edge on unsteady flow and heat transfer characteristics of two parallel plates are *** is found that the instability and unsteadiness of flow decrease with the increase of end-edge size,and the non-uniformity of wake velocity of both rounded and chamfered plates decreases *** non-uniformity of wake temperature increases firstly and then decreases at a small inclined angle,and the amplitude becomes the largest when S_(rou)(S_(cha))=3,while it basically keeps monotonically increasing at a large inclined ***,the global heat transfer performance of the flat plate is obviously affected by the end-edge modification,especially the chamfered *** the increase of chamfered size,the global Nusselt number basically shows the decreasing *** study provides a theoretical basis for the application of plate-shape structure in engineering fields.

关键词： two parallel plates end shape flow characteristic heat transfer numerical simulation

836例尿路上皮癌人表皮生长因子受体2表达情况及临床病理学分析

在线全文

学校读者我要写书评

暂无评论

泌尿外科杂志(电子版) 2024年第2期16卷 1-6页

作者：黄世旺贾凯鹏张天晓沈冲韩静雯张哲赵罡健郭嘉宁胡海龙天津医科大学第二医院泌尿外科天津医科大学第二医院病理科

目的探讨尿路上皮癌患者人表皮生长因子受体2 (human epidermal growth factor receptor 2,HER2)表达情况与临床病理特征之间的关系。方法收集2019年1月至2023年1月天津医科大学第二医院接受手术治疗的836例尿路上皮癌患者资料,通过... 详细信息

目的探讨尿路上皮癌患者人表皮生长因子受体2 (human epidermal growth factor receptor 2,HER2)表达情况与临床病理特征之间的关系。方法收集2019年1月至2023年1月天津医科大学第二医院接受手术治疗的836例尿路上皮癌患者资料,通过免疫组化检测HER2、细胞角蛋白20 (cytokeratin 20,CK20)、肿瘤蛋白53 (tumor protein 53,P53)、肿瘤增殖抗原Ki67的表达情况。HER2判读标准参考《中国尿路上皮癌人表皮生长因子受体2检测临床病理专家共识》,HER2 (3+)定义为HER2阳性。分析HER2表达与临床病理特征之间的关系。结果本研究共纳入836例患者,中位年龄70 (48～96)岁,尿路上皮癌伴组织学变异率23.09%(193例),HER2总体阳性率30.98%(259例)。不同组织学变异类型间HER2表达差异有统计学意义(P<0.05)。其中,微乳头样变HER2阳性比例最高(19/31,61.29%),其余依次为浆细胞样变(3/5,60.00%)、透明细胞样变(1/2,50.00%)、伴腺样分化(16/39,41.03%),肉瘤样癌中无HER2阳性患者(0/4)。HER2表达与患者性别、肿瘤部位、肿瘤分级、组织学变异类型、Ki67表达水平、P53表达水平及CK20表达水平有关,差异有统计学意义(P<0.05)。二分类多因素logistic回归分析结果显示,肿瘤位于膀胱、肿瘤高级别、伴有原位癌、CK20异常是HER2阳性的独立危险因素(P<0.05)。结论尿路上皮癌HER2表达情况与肿瘤级别、肿瘤发生部位、CK20表达、伴有原位癌密切相关,但与肿瘤T分期、淋巴血管侵犯未见明显相关性。不同类型组织学变异之间HER2表达差异有统计学意义。

关键词：尿路上皮癌人表皮生长因子受体2 病理学

Towards an Artificial Intelligence Framework for Data-Driven Prediction of Coronavirus Clinical Severity

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2020年第4期63卷 537-551页

作者： Xiangao Jiang Megan Coffee Anasse Bari Junzhang Wang Xinyue Jiang Jianping Huang Jichan Shi Jianyi Dai Jing Cai tianxiao zhang Zhengxing Wu Guiqing He Yitong Huang Department of Infectious Diseases Wenzhou Central HospitalWenzhou325000China Division of Infectious Diseases and Immunology Department of MedicineNew York UniversityNew YorkUSA Department of Population and Family Health Mailman School of Public HealthColumbia UniversityNew YorkUSA Courant Institute of Mathematical Sciences Computer Science DepartmentNew York UniversityNew YorkUSA Columbia College Columbia UniversityNew YorkUSA Departments of Infectious Diseases Cangnan People’s HospitalWenzhou325800China Department of Gynaecology Wenzhou Central HospitalWenzhou325000China

The virus SARS-CoV2,which causes the Coronavirus disease COVID-19 has become a pandemic and has spread to every inhabited *** the increasing caseload,there is an urgent need to augment clinical skills in order to identify from among the many mild cases the few that will progress to critical *** present a first step towards building an artificial intelligence(AI)framework,with predictive analytics(PA)capabilities applied to real patient data,to provide rapid clinical decision-making ***-19 has presented a pressing need as a)clinicians are still developing clinical acumen given the disease’s novelty,and b)resource limitations in a rapidly expanding pandemic require difficult decisions relating to resource *** objectives of this research are:(1)to algorithmically identify the combinations of clinical characteristics of COVID-19 that predict outcomes,and(2)to develop a tool with AI capabilities that will predict patients at risk for more severe illness on initial *** predictive models learn from historical data to help predict specifically who will develop acute respiratory distress syndrome(ARDS),a severe outcome in *** experimental results based on two hospitals in Wenzhou,Zhejang,China identify features most predictive of ARDS in COVID-19 initial presentation which would not have stood out to clinicians.A mild increase in elevated alanine aminotransferase(ALT)(a liver enzyme)),a presence of myalgias(body aches),and an increase in hemoglobin,in this order,are the clinical features,on presentation,that are the most *** two centers’COVID-19 case series symptoms on initial presentation can help predict severe *** models that learned from historical data of patients from two Chinese hospitals achieved 70%to 80%accuracy in predicting severe cases.

关键词： SARS-CoV2 COVID-19 coronavirus infectious diseases artificial intelligence predictive analytics

Dynamic regulation of the irrigation-nitrogen-biochar nexus for the synergy of yield,quality,carbon emission and resource use efficiency in tomato

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

Journal of Integrative Agriculture 2024年第2期23卷 680-697页

作者： Ping’an zhang Mo Li Qiang Fu Vijay PSingh Changzheng Du Dong Liu tianxiao Li Aizheng Yang School of Water Conservancy&Civil Engineering Northeast Agricultural UniversityHarbin 150030China Key Laboratory of Effective Utilization of Agricultural Water Resources Ministry of Agriculture and Rural Affairs/Northeast Agricultural UniversityHarbin 150030China Department of Biological and Agricultural Engineering&Zachry Department of Civil&Environmental Engineering Texas A&M UniversityTX 77843-117USA National Water and Energy Center UAE UniversityAI Ain999041United Arab Emirates Heilongjiang Agricultural Engineering Vocational College Harbin 150030China

Integrated water and fertilizer management is important for promoting sustainable development of facility agriculture,and biochar plays an important role in guaranteeing food production,as well as alleviating water shortages and the overuse of *** field experiment had twelve treatments and a control(CK)trial including two irrigation amounts(I1,100%ETm;I2,60%ETm;where ETm is the maximum evapotranspiration),two nitrogen applications(N1,360 kg ha^(−1);N2,120 kg ha^(−1))and three biochar application levels(B1,60 t ha^(−1);B_(2),30 t ha^(−1)and B3,0 t ha^(−1)).A multi-objective synergistic irrigation-nitrogen-biochar application system for improving tomato yield,quality,water and nitrogen use efficiency,and greenhouse emissions was developed by integrating the techniques of experimentation and ***,a coupled irrigation-nitrogen-biochar plot experiment was ***,tomato yield and fruit quality parameters were determined experimentally to establish the response relationships between irrigation-nitrogen-biochar dosage and yield,comprehensive quality of tomatoes(TCQ),irrigation water use efficiency(IWUE),partial factor productivity of nitrogen(PFPN),and net greenhouse gas emissions(NGE).Finally,a multi-objective dynamic optimization regulation model of irrigation-nitrogen-biochar resource allocation at different growth stages of tomato was constructed which was solved by the fuzzy programming *** results showed that the application of irrigation and nitrogen to biochar promoted increase in yield,IWUE and PFPN,while it had an inhibitory effect on *** addition,the optimal allocation amounts of water and fertilizer were different under different *** yield of the S1 scenario increased by 8.31%compared to the B_(1)I_(1)N_(2) treatment;TCQ of the S2 scenario increased by 5.14%compared to the B_(2)I_(2)N_(1) treatment;IWUE of the S3 scenario increased by 10.01%compared to the B1I2N2 treatment;PFPN of the S4 scenario increased by

关键词： irrigation-nitrogen-biochar dynamic regulation multi-dimensional target collaboration tomato sustainability