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考虑非线性因素的气缸盖刚强度分析与评估

车用发动机 2011年第6期 20-23,27页

作者：徐岩田小飞王艳霞中国兵器科学研究院北京100089 北京理工大学机械与车辆学院北京100081

对不同工况下气缸盖的强度和变形情况进行了研究,建立了气缸盖—气缸垫—气缸套—机体的组合体三维实体模型,进行了网格划分及仿真分析。考虑了气缸盖与气缸垫之间接触非线性因素以及气缸垫的材料非线性因素对气缸盖刚强度的影响,在进... 详细信息

对不同工况下气缸盖的强度和变形情况进行了研究,建立了气缸盖—气缸垫—气缸套—机体的组合体三维实体模型,进行了网格划分及仿真分析。考虑了气缸盖与气缸垫之间接触非线性因素以及气缸垫的材料非线性因素对气缸盖刚强度的影响,在进行正常工况机械强度计算的基础上,缸内最高燃烧压力增加为18MPa和20MPa工况下,对气缸盖的强化潜力进行了对比分析,分析了强化前后工程中比较关注部位的应力分布以及气缸盖底板火力面的变形分布情况。

关键词：气缸盖强度刚度有限元法非线性

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FPGA被动并行配置控制器的研究与实现

合肥工业大学学报（自然科学版） 2008年第4期31卷 531-533页

作者：葛飞何辅云夏玉宝合肥工业大学计算机与信息学院安徽合肥230009

为了快速方便地配置FPGA,文章提出了使用Flash存储FPGA的配置数据,再由CPLD控制Flash将存储的数据采用并行方式下载到FPGA的方法。由于Flash掉电后数据不会丢失,这样就解决了FPGA掉电易失的问题。该文给出了具体的硬件电路和软件模块的... 详细信息

为了快速方便地配置FPGA,文章提出了使用Flash存储FPGA的配置数据,再由CPLD控制Flash将存储的数据采用并行方式下载到FPGA的方法。由于Flash掉电后数据不会丢失,这样就解决了FPGA掉电易失的问题。该文给出了具体的硬件电路和软件模块的编程思路,通过仿真测试表明本设计的可行性。

关键词：现场可编程门阵列复杂可编程逻辑器件配置

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多复变数的抛物星形映射

数学学报（中文版） 2011年第3期54卷 467-482页

作者：冯淑霞张晓飞陈慧勇河南大学现代数学研究所开封475004 河南大学数学与信息科学学院开封475004

本文给出了抛物星形映射,ρ次的抛物星形映射,抛物形β型螺形映射和ρ次的抛物形β型螺形映射的定义.证明了推广的Rope-Suffridge算子保持这些映射的几何性质不变.

关键词：抛物星形映射抛物形β型螺形映射推广的Rope-Suffridge算子

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大学生网络成瘾者心理健康水平的研究

通化师范学院学报 2009年第5期30卷 59-61页

作者：李飞孙侠通化师范学院教育科学系吉林通化134002

研究采用杨文娇等编制的大学生网络成瘾问卷及SCL-90症状自评量表对266名在校大学生进行测验,测验表明大学生网络成瘾倾向存在性别差异,网络成瘾对大学生心理健康状况的影响较大。结论:高网络成瘾倾向者与低网络成瘾倾向者心理健康水平... 详细信息

研究采用杨文娇等编制的大学生网络成瘾问卷及SCL-90症状自评量表对266名在校大学生进行测验,测验表明大学生网络成瘾倾向存在性别差异,网络成瘾对大学生心理健康状况的影响较大。结论:高网络成瘾倾向者与低网络成瘾倾向者心理健康水平存在显著差异,不同类型网络成瘾对心理健康水平影响不同。

关键词：大学生网络成瘾心理健康

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职业教育开展校企合作的重要性分析

传奇.传记文学选刊(教学研究) 2010年第6期 83-84页

作者：江旭夏菲同济大学职业技术教育学院

从宏观、中观、微观的层面来分析职业教育开展校企合作的重要性。职业教育开展校企合作顺应了国家社会经济发展的需求,实现了学校与企业的双赢,使教师、学生与企业员工共同获利。

关键词：职业教育校企合作重要性

Comparison and Correlation of Magnetic Resonance Imaging and Clinical Severity in Nonhuman Immunodeficiency Virus Patients with Cryptococcal Infection of Central Nervous System

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Chinese Medical Journal 2018年第24期131卷 2930-2937页

作者： Xue-Qin Li Shuang xia Jian-Song Ji Yong-Hua Tang Mei-Zhu Zheng Yong-Mei Li fei Shan Zhi-Yan Lu Jian Wang Jin-Kang Liu Hui-Juan zhang Yu-Xin Shi Hong-Jun Li Department of Radiology Beijing Youan Hospital Affiliated to Capital Medical UniversityBeijing 100069China Department of Radiology Shengli Clinical Medical College of Fujian Medical UniversityFuJian Provincial Hospital South BranthFuzhouFujian 350004China Department of Radiology Tianjin First Central HospitalTianjin 300192China Department of Radiology Lishui Municipal Central HospitalThe Fifth Affiliated Hospital of Wenzhou Medical UniversityZhejiang University Lishui Hospital LishuiZhejiang 323000China Department of Radiology Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200020China Department of Radiology Tianjin Third Central HospitalTianjin 300170China Department of Radiology The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400042China Department of Radiology Zhongnan Hospital of Wuhan UniversityWuhanHubei 430071China Department of Imaging Center First Affiliated Hospital of Xinjiang Medical UniversityUrumqiXinjiang 830054China Department of Radiology Xiangya Hospital Affiliated of Central South UniversityChangshaHunan 410013China

Background:The incidence of cryptococcal meningitis among immunocompetent patients increases,especially in China and imaging plays an important *** current study was to find the correlation between magnetic resonance imaging (MRI)manifestation and clinical severity in nonhuman immunodeficiency virus patients with cryptococcal infection of central nervous system (CNS). Methods:A total of 65 patients with CNS cryptococcal infection from August 2014 to October 2016 were retrospectively included in this *** the patients had MRI data and clinical *** patients were divided into two groups according to whether the patients were confirmed with identifiable underlying *** and correlation of MRI and clinical data in both groups were investigated using independent sample t-test,Chi-square test,Mann-Whitney test and Spearman rank correlation analysis. Results:In all 65 patients,41 cases (41/65,63.1%;Group 1)had normal immunity and 24 cases (24/65,36.9%;Group 2)had at least one identifiable underlying ***,higher percentage of neutrophil (NEUT)in white blood cell (WBC),and increased cell number of cerebral spinal fluid (CSF)were much common in patients with underlying disease (Group 1 *** 2:Fever:21/41 vs.21/24,x^2 =8.715,P =0.003;NEUT in WBC:73.15%vs.79.60%,Z=-2.370,P =0.018;cell number of CSF:19 vs.200,Z=-4.298,P <0.001;respectively).Compared to the patients with normal immunity,the lesions are more common in the basal ganglia among patients with identifiable underlying disease (Group 1 *** 2:20/41 vs.20/24,x^2 =7.636,P =0.006).The number of the involved brain areas in patients with identifiable underlying disease were well correlated with the number of cells and pressure of CSF (r =-0.472,P =0.031,r =0.779,P =0.039;respectively). Conclusions:With the increased number of the involved brain areas in patients with identifiable underlying disease,the body has lower immunity against the organism which might result in higher intracr

关键词： Central Nervous System Clinical Status Cryptococcal Meningitis Immunity Magnetic Resonance Imaging

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圆果化香叶构件种群动态生命表

贵州农业科学 2009年第9期37卷 169-173页

作者：唐丽霞喻理飞贵州大学喀斯特森林生态研究中心贵州贵阳550025

以构件种群理论为基础,应用种群动态生命表的分析方法,对喀斯特森林顶极群落中的主要建群种圆果化香不同生境下一年中叶构件种群的数量动态进行测定分析。结果表明:圆果化香的现叶方式属于爆发型,出生率曲线呈现出双峰和三峰型,有2次爆... 详细信息

以构件种群理论为基础,应用种群动态生命表的分析方法,对喀斯特森林顶极群落中的主要建群种圆果化香不同生境下一年中叶构件种群的数量动态进行测定分析。结果表明:圆果化香的现叶方式属于爆发型,出生率曲线呈现出双峰和三峰型,有2次爆芽高峰(第1次为正常萌发,第2次为恶劣环境变化激发了叶芽的萌发);落叶曲线呈DeeveyⅡ型存活曲线,3种生境下死亡率曲线不同,林中和孤立2种生境是双峰型,林缘生境为三峰型。讨论了叶种群生命表分析对乔木树种的意义,叶种群的净生殖率R0,世代历期T,内禀增长率rm,周限增长率λ的意义和应用叶种群生命表分析法解释喀斯特特殊环境下,树种叶构件种群对环境的生长对策和更新对策。

关键词：圆果化香叶构件种群动态生命表喀斯特

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医药卫生科技期刊融媒体建设与传播策略

中国医药导报 2022年第18期19卷 194-196,F0003页

作者：王霞詹洪春《中国当代医药》杂志社编辑部北京100124 玉林师范学院商学院广西玉林537000

融媒体作为一类新型的媒体形式,实现了传播载体的创新,医药卫生科技期刊应顺应时代的发展潮流,迈入融合发展的新阶段。融媒体时代下,医药卫生科技期刊需要在信息承载内容与形式、信息传播的宗旨、信息传播形式等方面进行变革。本文结合... 详细信息

融媒体作为一类新型的媒体形式,实现了传播载体的创新,医药卫生科技期刊应顺应时代的发展潮流,迈入融合发展的新阶段。融媒体时代下,医药卫生科技期刊需要在信息承载内容与形式、信息传播的宗旨、信息传播形式等方面进行变革。本文结合医药卫生科技期刊融媒体建设与传播现状,提出了医药卫生科技期刊融媒体建设与传播策略:加强期刊融媒体顶层设计,向数字集约化发展;创新医药卫生科技期刊运营模式,实现流量价值最大化;提供精准化服务,满足客户个性化需求;运用多媒体手段,拓宽数字化传播渠道;加强融媒体人才建设,提高办刊队伍整体素质。

关键词：医药卫生科技期刊融媒体建设传播策略融合发展

Impact of LDB3 gene polymorphisms on clinical presentation and implantable cardioverter defibrillator(ICD) implantation in Chinese patients with idiopathic dilated cardiomyopathy

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2019年第9期20卷 766-775页

作者： Dong-fei WANG Jia-lan LYU Juan FANG Jian CHEN Wan-wan CHEN Jia-qi HUANG Shu-dong xia Jian-mei JIN Fang-hong DONG Hong-qiang CHENG Ying-ke XU xiao-gang GUO Department of Cardiology the First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310003China Department of Cardiology the Second Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310009China Department of Cardiology Pujiang Branch of the First Affiliated HospitalSchool of MedicineZhejiang UniversityJinhua 322200China Department of Pathology and Pathophysiology School of MedicineZhejiang UniversityHangzhou 310058China Department of Cardiology the Forth Affiliated HospitalSchool of MedicineZhejiang UniversityYiwu 322000China Key Laboratory of Biomedical Engineering of Ministry of Education Department of Biomedical EngineeringZhejiang UniversityHangzhou 310027China

Objective:Mutations in LIM domain binding 3(LDB3)gene cause idiopathic dilated cardiomyopathy(IDCM),a structural heart disease with a complicated genetic ***,the association of polymorphisms in the LDB3 gene with susceptibility to IDCM in Chinese populations remains unexplored as dose the impact on clinical ***:We sequenced all exons and the adjacent part of introns of the LDB3 gene in 159 Chinese Han IDCM patients and 247 healthy *** we detected the distribution of polymorphisms in the LDB3 gene in all participants and assessed their associations with risk of ***,we conducted a stratified genotype–phenotype correlation ***:The A allele of rs4468255 was significantly associated with IDCM(P<0.01).The rs4468255,rs11812601,rs56165849,and rs3740346 were also associated with diastolic blood pressure(DBP)and left ventricular ejection fraction(LVEF)(P<0.05).Notably,a higher frequency of rs4468255 polymorphism was observed in implantable cardioverter defibrillator(ICD)recipients under a recessive model(P<0.01),whereas the significant association disappeared after adjusting for potential ***,in the dominant model,notable correlations could only be observed after adjusting for multi ***:The rs4468255 was significantly correlated with IDCM of Chinese Han population.A allele of rs4468255 is higher in IDCM patients with ICD implantation,suggesting the influence of genetic background in the generation of this *** addition,rs11812601,rs56165849,and rs3740346 in LDB3 show association with brain natriuretic peptide,DBP,and LVEF levels in patients with IDCM but did not show any association with IDCM susceptibility.

关键词： Idiopathic dilated cardiomyopathy Implantable cardioverter defibrillator(ICD) LIM domain binding 3(LDB3) Polymorphism Han Chinese