检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

气相色谱法测定五加皮中7种掺伪香精

西北药学杂志 2024年第4期39卷 11-15页

作者：王锋崔艳华王冰洁顾璇邹子爵李灿西安交通大学医学部附属三二〇一医院汉中723000 湖南省产商品质量检验研究院长沙410007

目的建立气相色谱法测定五加皮中7种香精成分的分析方法。方法对提取溶剂、分流比及色谱柱型号等参数进行考察,利用氢火焰离子化检测器(flame ionization detector,FID)检测,采用外标法定量分析。结果将乙酸乙酯作为提取溶剂,CD624毛细... 详细信息

目的建立气相色谱法测定五加皮中7种香精成分的分析方法。方法对提取溶剂、分流比及色谱柱型号等参数进行考察,利用氢火焰离子化检测器(flame ionization detector,FID)检测,采用外标法定量分析。结果将乙酸乙酯作为提取溶剂,CD624毛细管色谱柱分离,分流比为5∶1条件最优,7种香精成分能实现完全分离,线性关系良好,相关系数r均大于0.999。平均加标回收率为87.33%~93.66%,相对标准偏差(n=6)均低于5%。结论该方法简单、快速、准确,可满足五加皮中7种香精成分的检测。

关键词：气相色谱法五加皮掺伪香精

北京市海淀区2012-2021年《出生医学证明》管理现状分析与探索

在线全文

学校读者我要写书评

暂无评论

医学信息 2024年第3期37卷 69-72页

作者：赵银珠邹晓璇胡美娜殷延敏北京市海淀区妇幼保健院保健部

目的进一步提高辖区《出生医学证明》管理水平，探索适宜的《出生医学证明》业务管理策略。方法数据来源于北京市妇幼网络信息系统中《出生医学证明》模块，对北京市海淀区2012-2021年《出生医学证明》签发业务进行统计和分析。结果 2... 详细信息

目的进一步提高辖区《出生医学证明》管理水平，探索适宜的《出生医学证明》业务管理策略。方法数据来源于北京市妇幼网络信息系统中《出生医学证明》模块，对北京市海淀区2012-2021年《出生医学证明》签发业务进行统计和分析。结果 2012-2021年，海淀区新生儿活产数总体呈下降趋势，《出生医学证明》当年首次签发率在90%～95%;2012-2021年海淀区《出生医学证明》换发量比较，差异有统计学意义（P<0.05）;10年间补发量比较，差异有统计学意义（P<0.05）;2012-2021年海淀区《出生医学证明》废证率持续走低。结论应不断加强业务和辖区管理，大力推进信息化建设，更好地服务群众，提高群众的满意度和幸福感。

关键词：《出生医学证明》签发管理妇幼保健辖区管理

Four COVID-19 Cases of New Variant B.1.351 First Emerging in South Africa in Chinese Passengers on Same Flight-Shenzhen,China,January 2021

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2021年第8期3卷 175-177页

作者： Cong Cheng Lei Wang Ziquan Lyu Bo Peng Yinghui Li Dongfeng Kong Le Zuo Xiaomin Zhang Chao Yang Weiwen Liu Jia Wan Yijun Tang Junjia He Ying Wen Shule Xu Weihua Wu Ying Chen Guangnan Liu Junjie Xia xuan zou Renli Zhang Qinghua Hu Shujiang Mei Tiejian Feng Department of Communicable Diseases Control and Prevention Shenzhen Center for Disease Control and PreventionShenzhenGuangdongChina Microbiology Laboratory Shenzhen Center for Disease Control and PreventionShenzhenGuangdongChina Key Laboratory of Molecular Epidemiology of Shenzhen Shenzhen Center for Disease Control and PreventionShenzhenGuangdongChina Institute of pathogenic biology Shenzhen Center for Disease Control and PreventionShenzhenGuangdongChina Shenzhen Center for Disease Control and Prevention ShenzhenGuangdongChina.

At 04∶50 on January 1,2021,a 36-year-old Chinese project manager(Case A),a 29-year-old Chinese worker(Case B),and a 53-year-old Chinese businessman(Case C)returned from Africa(Case A and B from South Africa and Case C from Lesotho)on the same flight and tested coronavirus disease 2019(COVID-19)RNA positive by real-time polymerase chain reaction(PCR)by Baoan District People’s Hospital.Shenzhen CDC received their oral nasopharyngeal swabs packages from the hospital and retested COVID-19 RNA positive at 09∶50.Meanwhile,Case D.

关键词： Africa COV worker

Labeled box-particle CPHD filter for multiple extended targets tracking

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 Systems Engineering and Electronics 2019年第1期30卷 57-67页

作者： zou Zhibin SONG Liping CHENG xuan School of Electronic Engineering Xidian University

In multiple extended targets tracking, replacing traditional multiple measurements with a rectangular region of the nonzero volume in the state space inspired by the box-particle idea is exactly suitable to deal with extended targets, without distinguishing the measurements originating from the true targets or clutter.Based on our recent work on extended box-particle probability hypothesis density(ET-BP-PHD) filter, we propose the extended labeled box-particle cardinalized probability hypothesis density(ET-LBP-CPHD) filter, which relaxes the Poisson assumptions of the extended target probability hypothesis density(PHD) filter in target numbers, and propagates not only the intensity function but also cardinality distribution. Moreover, it provides the identity of individual target by adding labels to box-particles. The proposed filter can improve the precision of estimating target number meanwhile achieve targets' tracks. The effectiveness and reliability of the proposed algorithm are verified by the simulation results.

关键词： extended target multiple targets tracking labled boxparticle cardinalized probability hypothesis density (CPHD).

Research on the Control Model of the Sub-Branch Corporations' Total Remunerations

在线全文

学校读者我要写书评

暂无评论

Research on the Control Model of the Sub-Branch Corporations...

光动力抗菌技术在鲜切菜加工除菌过程中的应用研究进展

2013年教育技术与管理科学国际会议

作者： Yiguo Jiang xuan zou Dept.China Electric Power Research Institute College of Economics and Management North China Electric Power University

Control and management of sub-branches’ total remunerations is always a great problem. The way to control the total remunerations within a reasonable range without affecting the employees’ enthusiasm and the way to reduce the labor cost while attracting talented people always confused the HR department and even the executives. From a macroscopic view of input-output analysis, this article declared a modified way to control the sub-branches’ total remunerations. This model was built based on benefit indicators, calculation methods, classification scheme, etc. Its goal is to solve the problem of the balance between the incentive and constraints in sub-branches, and to achieve an efficient way to control and manage the sub-branches’ total remunerations.

关键词： sub-branch total remunerations control model

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

食品安全质量检测学报 2024年第3期15卷 110-116页

作者：潘晓琴肖珊邹水洋王波蔡燕雪陈璇王际辉东莞理工学院生命健康技术学院东莞市预制菜创新发展与品质控制重点实验室中国轻工业健康食品开发与营养调控重点实验室东莞523808

微生物灭活作为鲜切菜加工过程中关键的步骤之一,关系着鲜切菜的保质期与食品安全问题。因此,研究和利用各种除菌技术以延长鲜切菜保鲜期、保证食品安全与质量十分重要。光动力抗菌技术(photodynamic antimicrobial technology,PDAT)是... 详细信息

微生物灭活作为鲜切菜加工过程中关键的步骤之一,关系着鲜切菜的保质期与食品安全问题。因此,研究和利用各种除菌技术以延长鲜切菜保鲜期、保证食品安全与质量十分重要。光动力抗菌技术(photodynamic antimicrobial technology,PDAT)是一种新兴的食品非热除菌技术手段,利用光生的活性氧自由基(reactive oxygen species,ROS)攻击微生物细胞的多个靶点,不易产生耐药性,在鲜切菜领域展现出了巨大的应用前景,为当前研究的前沿热点。考虑到鲜切菜本身具有的生理活性成分与光敏剂之间的相互作用,相比离体实验,PDAT在鲜切菜中的应用效果有限,应将其视为额外的除菌工具,而不是其他传统除菌技术的替代品。本文以鲜切菜的食品安全为出发点,综述了PDAT的原理、方法优势及劣势,鲜切菜的代谢生理变化与PDAT在鲜切菜领域上的应用研究进展与未来发展方向,以期为促进净菜产业的食品安全和PDAT的发展提供依据。

关键词：光动力抗菌技术鲜切菜光敏剂微生物灭活活性氧自由基代谢

Premorbid Steatohepatitis Increases the Seriousness of Dextran Sulfate Sodium-induced Ulcerative Colitis in Mice

在线全文

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2022年第5期10卷 847-859页

作者： Meng-Yu Wang Zi-xuan Wang Lei-Jie Huang Rui-Xu Yang Zi-Yuan zou Wen-Song Ge Tian-Yi Ren Jian-Gao Fan Department of Gastroenterology Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina Shanghai Key Lab of Pediatric Gastroenterology and Nutrition ShanghaiChina

Background and Aims:The concurrence of nonalcoholic steatohepatitis(NASH)and ulcerative colitis(UC)is increasingly seen in clinical practice,but the underlying mechanisms remain unclear.This study aimed to develop a mouse model of the phenomenon by combining high-fat high-cholesterol diet(HFHCD)-induced NASH and dextran sulfate sodium(DSS)-induced UC,that would support mechanistic studies.Methods:Male C57BL/6 mice were randomly assigned to two groups receiving either a chow diet or HFHCD for 12 weeks of NASH modeling.The mice were divided into four subgroups for UC modeling:(1)A control group given a chow diet with normal drinking water;(2)A colitis group given chow diet with 2%DSS in drinking water;(3)A steatohepatitis group given HFHCD with normal drinking water;and(4)A steatohepatitis+colitis group given HFHCD with 2%DSS in drinking water.Results:NASH plus UC had high mortality(58.3%).Neither NASH nor UC alone were fatal.Although DSS-induced colitis did not exacerbate histological liver injury in HFHCD-fed mice,premorbid NASH significantly increased UC-related gut injury compared with UC alone.It was characterized by a significantly shorter colon,more colonic congestion,and a higher histopathological score(p<0.05).Inflammatory(tumor necrosis factor-alpha,interleukin 1 beta,C-C motif chemokine ligand 2,and nuclear factor kappa B)and apoptotic(Bcl2,Bad,Bim,and Bax)signaling pathways were significantly altered in distal colon tissues collected from mice with steatohepatitis+colitis compared with the other experimental groups.Conclusions:Premorbid steatohepatitis significantly aggravated DSS-induced colitis and brought about a lethal phenotype.Potential links between NASH and UC pathogeneses can be investigated using this model.

关键词： Inflammatory bowel disease Ulcerative colitis Nonalcoholic fatty liver disease Mouse model Mortality

Coupled models of heat transfer and phase transformation for the run-out table in hot rolling

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 Zhejiang University-Science A(Applied Physics & Engineering) 2008年第7期9卷 932-939页

作者： Shui-xuan CHEN Jun zou Xin FU State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

Mathematical models are been proposed to simulate the thermal and metallurgical behaviors of the strip occurring on the run-out table(ROT) in a hot strip mill. A variational method is utilized for the discretization of the governing transient con-duction-convection equation,with heat transfer coefficients adaptively determined by the actual mill data. To consider the thermal effect of phase transformation during cooling,a constitutive equation for describing austenite decomposition kinetics of steel in air and water cooling zones is coupled with the heat transfer model. As the basic required inputs in the numerical simulations,thermal material properties are experimentally measured for three carbon steels and the least squares method is used to statistically derive regression models for the properties,including specific heat and thermal conductivity. The numerical simulation and experimental results show that the setup accuracy of the temperature prediction system of ROT is effectively improved.

关键词：传热相变冷却处理热轧

Effect of baffles on bubble behavior in a bubbling fluidized bed for chemical looping processes

在线全文

学校读者我要写书评

暂无评论

Particuology 2020年第6期18卷 154-167页

作者： Xiao Zhu xuan Feng Yuanyuan zou Laihong Shen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast UniversityNanjing 210096China

A bubbling fluidized bed is generally used as the fuel reactor in chemical looping processes.However,in sufficient gas-solid contact remains a steadfast problem.As such,we propose the use of in ternal baffles to split bubbles at a high gas velocity and to restrict the movement of large-scale solids in the fluidized bed.We investigated the effect of baffle arrangement on the bubble size and energy,pressure gradient,particle distribution,and particle velocity in a fluidized bed using a computational particle fluid dynamics simulation based on our experimental results.We discuss the main influenci ng factors,which in elude presence of caps,number of baffles,and the baffle opening ratio.The baffle structure with caps efficiently broke the large bubbles without creating jet flow.Three baffles were deemed suitable in the bed owing to the small bubble size and uniform gas-solid distribution in each compartment.We selected a baffle opening ratio of 20.5%,which improved the flow pattern without causing a significant increase in the pressure gradient and particle velocity through the baffles.We also discussed the potential for sea ling up this baffled fluidized bed for industrial applications.

关键词： Baffle Bubble behavior Fluidized bed Chemical looping CPFD simulations