检索结果-南通市图书馆

ON A GENERALIZED GEOMETRIC CONSTANT AND SUFFICIENT CONDITIONS FOR NORMAL STRUCTURE IN bANACH SPACES

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2017年第5期37卷 1209-1220页

作者： mina DINARVAND Faculty of Mathematics K.N.ToosiUniversity of TechnologyP.O.Box 16315-1618TehranIran

In this paper, we introduce a new geometric constant C;（a, X） of a banach space X, which is closely related to the generalized von Neumann-Jordan constant and analyze some properties of the constant. Subsequently, we present several sufficient conditions for normal structure of a banach space in terms of this new constant, the generalized James constant, the generalized Garc′?a-Falset coefficient and the coefficient of weak orthogonality of Sims. Our main results of the paper generalize some known results in the recent literature.

关键词： uniform normal structure generalized Garc′?a-Falset coefficient coefficient of weak orthogonality constant CN Jp(a,X) generalized James constant

华北局地大暴雨过程中多个β中尺度对流系统发生发展对比分析

在线全文

学校读者我要写书评

暂无评论

气象 2024年第2期50卷 181-194页

作者：徐姝易笑园熊明明孙密娜林晓萌天津市气象台天津300074 中国气象局水文气象重点开放实验室南京210024 天津市气候中心天津300074

利用常规地面高空观测、多普勒雷达、风廓线、VDRAS(Variational Doppler Radar Analysis System)和NCEP再分析资料,对2018年8月5—6日副热带高压(以下简称副高)控制下华北一次局地大暴雨过程中多个β中尺度对流系统触发和发展机制进行... 详细信息

利用常规地面高空观测、多普勒雷达、风廓线、VDRAS(Variational Doppler Radar Analysis System)和NCEP再分析资料,对2018年8月5—6日副热带高压(以下简称副高)控制下华北一次局地大暴雨过程中多个β中尺度对流系统触发和发展机制进行了分析。结果表明:这次大暴雨发生在副高控制下,处于高温、高湿气团中,大气层结极不稳定。暴雨由多个相继发展的中尺度对流系统造成,分别是太行山迎风坡上西南—东北向、华北平原地区保定一带南北向、保定至霸州附近西南—东北向和以雄安新区为中心东西向原地生消的准静止MCS-Ⅰ、MCS-Ⅱ、MCS-Ⅲ和MCS-Ⅳ,均属于β中尺度。在相似的环境中,不同中尺度对流系统触发机制有较大差异,太行山迎风坡上的MCS-Ⅰ是由近地层偏东暖湿气流在迎风坡与山风形成的辐合抬升触发;由辐射差异和前期强降水形成的局地冷池受MCS-Ⅰ影响再次加强后,其出流与环境风形成的两条地面辐合线分别触发了MCS-Ⅱ和MCS-Ⅲ,并组织对流沿辐合线呈带状发展;而超低空偏东风增强叠加冷池出流在地形抬升作用下促使沿山暖湿气团进一步抬升,使得原本消亡的MCS-Ⅰ再次重建。MCS-Ⅳ发展最旺盛、持续时间最长,是大暴雨中心的直接制造者,一方面MCS-Ⅱ与MCS-Ⅲ、MCS-Ⅰ与MCS-Ⅳ的两次合并过程,是MCS-Ⅳ增强、持久的重要原因;另一方面边界层偏东风急流为MCS-Ⅳ的发展提供了水汽和不稳定能量等有利条件,同时推动其左前方中尺度涡旋的发展,导致MCS-Ⅳ所在地的气旋性涡度大大增加,加强了以急流轴为中心的垂直次级环流发展,造成MCS-Ⅳ的发展维持,形成华北平原地区以雄安新区为中心的东西向大暴雨带。

关键词：准静止中尺度对流系统对流单体合并冷池地面辐合线中尺度边界层急流中尺度涡旋

SOLUTION OF THE RAYLEIGH PRObLEM FOR A POWER-LAW NON-NEWTONIAN CONDUCTING FLUID VIA GROUP METHOD

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2002年第6期23卷 639-646页

作者： mina b.Abd-el-Malek Nagwa A.badran Hossam S.Hassan Department of Engineering Mathematics and Physics Faculty of Engineering Alexandria University 21544 Alexandria Egypt Department of basic and Applied Science Arab Academy for Science and Technology and Maritime Transport P O Box 1029 Alexandria Egypt

An investigation is made of the magnetic Rayleigh problem where a semi_infinite plate is given an impulsive motion and thereafter moves with constant velocity in a non_Newtonian power law fluid of infinite extent. The solution of this highly non_linear problem is obtained by means of the transformation group theoretic approach. The one_parameter group transformation reduces the number of independent variables by one and the governing partial differential equation with the boundary conditions reduce to an ordinary differential equation with the appropriate boundary conditions. Effect of the some parameters on the velocity u(y,t) has been studied and the results are plotted.

关键词： Rayleigh problem group method non_linearity conducting fluid non_Newtonian power law fluid

Fuzzy coloured petri nets‐based method to analyse and verify the functionality of software

在线全文

学校读者我要写书评

暂无评论

CAAI Transactions on Intelligence Technology 2023年第3期8卷 863-879页

作者： mina Chavoshi Seyed Morteza babamir Department of Software Engineering University of KashanKashanIran

Some types of software systems,like event‐based and non‐deterministic ones,are usually specified as rules so that we can analyse the system behaviour by drawing inferences from firing the ***,when the fuzzy rules are used for the specification of non‐deterministic behaviour and they contain a large number of variables,they constitute a complex form that is difficult to understand and infer.A solution is to visualise the system specification with the capability of automatic rule *** this study,by representing a high‐level system specification,the authors visualise rule representation and firing using fuzzy coloured Petri‐***,several fuzzy Petri‐nets‐based methods have been presented,but they either do not support a large number of rules and variables or do not consider significant cases like(a)the weight of the premise's propositions in the occurrence of the rule conclusion,(b)the weight of conclusion's proposition,(c)threshold values for premise and conclusion's propositions of the rule,and(d)the certainty factor(CF)for the rule or the conclusion's *** considering cases(a)-(d),a wider variety of fuzzy rules are *** authors applied their model to the analysis of attacks against a part of a real secure water treatment *** another real experiment,the authors applied the model to the two scenarios from their previous work and analysed the results.

关键词： fuzzy logic software engineering verification

On fundamental groups related to the Hirzebruch surface F_1

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 Mathematics 2008年第4期51卷 728-745页

作者： Michael FRIEDMAN mina TEICHER Department of Mathematics Bar-Ilan University

Given a projective surface and a generic projection to the plane,the braid monodromy factorization(and thus,the braid monodromy type)of the complement of its branch curve is one of the most important topological invariants,stable on *** this factorization,one can compute the fundamental group of the complement of the branch curve,either in C^2 or in CP^*** this article,we show that these groups,for the Hirzebruch surface F_1,(a,b),are *** is, they are an extension of a solvable group,which strengthen the conjecture on degeneratable surfaces.

关键词： Hirzebruch surfaces degeneration generic projection branch curve braid monodromy fundamental group classification of surfaces

Emerging curative-intent minimally-invasive therapies for hepatocellular carcinoma

在线全文

学校读者我要写书评

暂无评论

World Journal of Hepatology 2022年第5期14卷 885-895页

作者： Kylie E Zane Paul b Nagib Sajid Jalil Khalid Mumtaz mina S Makary College of Medicine The Ohio State UniversityColumbusOH 43210United States Division of Gastroenterology Hepatology and NutritionDepartment of Internal MedicineThe Ohio State University Wexner Medical CenterColumbusOH 43210United States Division of Vascular and Interventional Radiology Department of RadiologyThe Ohio State University Wexner Medical CenterColumbusOH 43210United States

Hepatocellular carcinoma(HCC)is the most common cause of liver malignancy and the fourth leading cause of cancer deaths *** can be achieved for early stage HCC,which is defined as 3 or fewer lesions less than or equal to 3 cm in the setting of Child-Pugh A or b and an ECOG of *** outside of these criteria who can be down-staged with loco-regional therapies to resection or liver transplantation(LT)also achieve curative ***,surgical resection,LT,and ablation are considered curative therapies for early ***,results from recently conducted LEGACY study and DOSISPHERE trial demonstrate that transarterial radio-embolization has curative outcomes for early HCC,leading to its recent incorporation into the barcelona clinic liver criteria guidelines for early *** review is based on current evidence for curativeintent loco-regional therapies including radioembolization for early-stage HCC.

关键词： Hepatocellular carcinoma Loco-regional therapy Radiation segmentectomy Transarterial radio-embolization Ablation Transarterial chemo-embolization Curative intent

Change in relative density of WC-Co cemented carbides in spark plasma sintering process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2008年第1期27卷 74-77页

作者： SUN Lan LIN Chenguang JIA Chengchang JIA Xian XIAN mina School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China School of Manufacturing Science and Engineering Sichuan University Chengdu 610065 China Powder Metallurgy and Special Materials Department General Research Institute for Nonferrous Metals Beijing 100088 China

The relative density of WC-Co cemented carbides during spark plasma sintering（SPS） was *** on the change in displacement of the ram in the SPS system,the relative densities in the sintering process can be achieved at different *** results indicated that densification of the samples started at near 900°C,the density rapidly reached its maximum at the increasing temperature stage,in which the temperature was lower than the sintering temperature of 1200°C,and most of the densification took place in the ***,the theoretical values were consistent with the experimental results.

关键词： spark plasma sintering relative density WC-Co cemented carbides

Establishing a child and adolescent mental health center in Herat,Afghanistan:a project description

在线全文

学校读者我要写书评

暂无评论

Global Health Journal 2023年第4期7卷 194-199页

作者： Abdul Fattah Najm Aziz-ur-Rahman Niazi mina Alekozay Emily b.Allan Kaaren Mathias Technical Director International Assistance MissionHerat 3001Afghanistan Department of Public Health and Infectious Diseases Faculty of MedicineHerat 3001Afghanistan Independent Consultant RedcarNorth YorkshireTS103JAUK Faculty of Health University of CanterburyChristchurch 8140New Zealand

Objective:Afghanistan has witnessed a long-lasting 4-decade armed conflict,which together with high levels of poverty and interpersonal violence,resulted in high incidence and prevalence of mental disorders in general population,including children and *** mid-2018,there was neither mental health care facility nor a child psychiatrist in ***,we report the establishment of the first children and adolescents'mental health center(CAMHC)in Herat province of ***:In July 2018,CAMHC was initiated at Mental Health Training *** was initially planned by the International Assistance Mission(IAM)and Herat Public Health Directorate;and financially supported by the Tearfund UK,the United Methodist Committee on Relief and Tearfund *** target population of CAMHC was children and adolescents in Herat and neighboring provinces,healthcare professionals,staff of government and non-governmental organizations,school teachers and community ***:A group of eight mental health professionals were trained and made the interdisciplinary board for diagnosis and management of mental disorders in children and *** the initial three-year period,2448 patients,including 1264(51.6%)boys and 1184(48.4%)girls,presented with mental disorders to *** and management of mental disorders were performed according to standard international *** awareness-raising seminars were held;2000 leaflets,10000 posters,and 30000 brochures were prepared and distributed;and two short video clips were produced and broadcast via IAM website,social media and local TV channels.A database was developed to house for project data,assessment of outcomes and reporting to ***:Establishment of CAMHC resulted in significant achievements in diagnosis and management of mental disorders among children and adolescents,healthcare staff capacity building,and awareness-raising about mental *** o

关键词： Child and adolescent Mental health Herat Afghanistan

Evaluation of immobilizing agents as soil quality conditioners in addition to their metal(loid) immobilizing effect

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2022年第2期32卷 307-316页

作者： Chaw Su LWIN mina LEE Young-Nam KIM Gary OWENS Kwon-Rae KIM Department of Soil and Water Science Yezin Agricultural UniversityYezinNaypyitaw 15013Myanmar Department of Smart-Agro Industry Gyeongsang National UniversityJinju 52725Korea Institute of Agriculture and Life Science(IALS) Gyeongsang National UniversityJinju 52828Korea Environmental Contaminants Group Future Industries InstituteUniversity of South AustralianMawson Lakes SA 5095Australia

In trace metal (TM)-contaminated agricultural soils,management of TM availability is important for safe crop *** addition,maintenance or improvement of soil quality is vital for sustainable crop *** TM phytoavailability and increased soil quality can be achieved by the application of various immobilizing agents to soil,which can supply both macronutrients and organic *** study investigated the long-term influences of four common immobilizing agents on soil biogeochemical properties and the phytoavailability of TMs in mixed metal-contaminated soil from a cultivated upland near an abandoned mining *** (L),gypsum (G),fly ash (F),and animal manure-based compost (C) were applied to pots containing contaminated soil,either individually or in *** incubation for three years under sequential cultivation of two crops and fallow,soil biogeochemical properties were determined,and brassica rapa plant bioassay was *** phytoavailability of all TMs (both cationic metals and anionic metalloids) remained significantly lower in soils treated with immobilizing agents even after three years,when compared with the no-agent control (CK) *** addition,the soil quality was significantly improved by treatment with immobilizing *** instance,the C and L+C treatments were the most effective in improving soil physical (bulk density,porosity,and water-resistant aggregate stability),chemical (pH,organic matter,total nitrogen,cation exchange capacity,and plant-available phosphorus,magnesium,and potassium),and biological (microbial biomass carbon and dehydrogenase activity) *** improvement of soil properties and lowering of TM bioavailability were also consistent with the most significant increase in *** biomass production observed in the C treatment,followed by the L+C,G+F,L,G,F,and L+G treatments,as compared with that in *** results indicate that the function of the TM-immobilizing agent as a soil qualit

关键词： crop production metal bioavailability metal immobilization metal phytoavailability soil amendments soil biogeochemical properties soil remediation trace metals