检索结果-南通市图书馆

Effect of Environmental Gradients on the Quantity and Quality of Fallen Logs in Tsuga longibracteata Forest in Tianbaoyan National Nature Reserve, Fujian Province,China

引用

Journal of Mountain Science 2013年第6期10卷 1118-1124页

作者： YOU Hui-ming HE Dong-jin YOU Wei-bin LIU Jin-shan cai chang-tang Fujian Agriculture and Forestry University Fujian Academy of Forestry Science Tianbaoyan National Nature Reserve

We investigated the quantity and quality 0f fallen l0gs in different Tsuga l0ngibracteata f0rest c0mmunities in the Tianba0yan Nati0nal Nature Reserve. We used redundancy analysis t0 determine the spatial distributi0n 0f fallen l0gs in the different f0rest c0mmunities and t0 analyze the relati0nships am0ng stand structure, t0p0graphic fact0rs and human disturbance. The v0lume, c0vered area, mean l0g length and number 0f fallen l0gs differed significantly am0ng f0rest types （P 〈 0.05）, but mean diameter at breast height sh0wed n0 significant difference （P 〉 0.05）. The l0g v0lume and c0vered area in different f0rest types sh0wed the f0ll0wing trend： T. l0ngibracteata pure f0rest 〈 T. l0ngibracteata ＋ Olig0staehyum scabrifl0rur 〈 T. l0ngibraeteata ＋ hardw00d 〈 Rh0d0dendr0n simiarum ＋ T. l0ngibraeteata 〈 T. l0ngibraeteata ＋ Phyll0stachys heter0cycla pubescens. The spatial distributi0n patterns 0f l0gs quantity and quality indicated that l0g v0lume and c0vered area were str0ngly affected by envir0nmental fact0rs in the f0ll0wing 0rder： human disturbance 〉 elevati0n 〉 sl0pe p0siti0n 〉 b0le height 〉 tree height 〉 sl0pe aspect 〉 density 〉 basal area 〉 sl0pe gradient. The relative c0ntributi0n 0f envir0nmental variables 0n the t0tal variance was t0p0graphy （76%）〉 disturbance （42%）〉 stand structure （35%）. T0p0graphy and disturbance c0mbined explained 8.2% 0f the variance. Fallen l0~s auantitv and aualitvwere negatively related t0 elevati0n and sl0pe p0siti0n, and p0sitively ass0ciated t0 human disturbance. The l0g v0lume decreased fr0m n0rthern t0 s0uthern sl0pes. Envir0nmental fact0rs had the highest impact 0n class I （slightly decayed）, and l0west impact 0n class V （highly decayed）.

关键词： Fallen logs Distribution patterns Topography Human disturbance TianbaoyanNational Nature Reserve

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

Abrasive Wear Behaviors of Light-weight Austenitic Fe-24Mn-7Al-1C Steel and Mn13Cr2 Steel

引用

Journal of Iron and Steel Research International 2016年第8期23卷 857-866页

作者： Shi-guang PENG Ren-bo SONG Zhi-dong TAN chang-hong cai Ke GUO Zhong-hong WANG School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083China School of Materials Science and Engineering University of Science and Technology Liaoning Anshan 117022 Liaoning China Angang Group Mining Design and Research Institute Anshan 114004 Liaoning China

The impact abrasive wear behaviors of light-weight austenitic Fe-24Mn-7Al-1Csteel with increasing impact wear conditions were studied by comparing with the modified Hadfield（Mn13Cr2）*** tests were performed with the MLD-10 abrasive wear testing *** parameters such as impact energy,impacting frequency and wear time were *** explore the abrasive wear behaviors under different impact energies,the parameters including mass loss,wear resistance and hardness were evaluated in *** microstructures of the steels were further analyzed using optical microscopy（OM）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）and X-ray diffraction（XRD）.Results showed that the light-weight austenitic Fe-24Mn-7Al-1Csteel had a better wear resistance than Mn13Cr2 steel under the impact energy *** wear resistance of light-weight austenitic Fe-24Mn-7Al-1Csteel was about 1.09-1.17 times as high as that of Mn13Cr2 steel under low and medium impact energy（0.5-2.0J）conditions,and 1.41 times under high impact energy（4.0J）*** Mn13Cr2 steel,the evolution of dislocation substructure with increasing impact energy showed typical stacking fault,interaction of twins and dislocations,as well as mechanical *** high work-hardening rate in Fe-24Mn-7Al-1Csteel was caused by Taylor lattice and high density of dislocation tangles.

关键词： twins dislocation hardness abrasive steels hardening stacking refinement austenite stainless

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

Endoscopic submucosal dissection for early signet ring cell gastric cancer:A systematic review and meta-analysis

引用

World Journal of Clinical Cases 2022年第20期10卷 6915-6926页

作者： Chun-Yan Weng Shao-Peng Sun chang cai Jing-Li Xu Bin Lv Department of Gastroenterology The First Clinical Medical College of Zhejiang Chinese Medical UniversityHangzhou 310000Zhejiang ProvinceChina Department of Gastrointestinal Surgery The First Clinical Medical University of Zhejiang Chinese Medical UniversityHangzhou 310000Zhejiang ProvinceChina Department of Gastroenterology The First Affiliated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310006Zhejiang ProvinceChina

BACKGROUND The use of endoscopic submucosal dissection(ESD)for treating early signet ring cell carcinoma(SRC)is controversial due to the risk of lymph node *** To carry out a meta-analysis to evaluate ESD for therapeutic efficacy and safety in early signet ring cell gastric *** The PubMed,Web of Science,Cochrane Library,and EMBASE databases were used to search for relevant studies evaluating the therapeutic efficacy and safety of ESD in *** rates of recurrence,complete resection,incomplete resection,curative resection,en bloc resection,and adverse events were extracted and *** methodological quality of the enrolled studies was assessed using the Newcastle-Ottawa *** bias was evaluated by the Egger’s *** review board approval and written consent were not needed for this *** This meta-analysis enrolled seven studies with 653 participants undergoing ESD treatment for early *** overall recurrence rate was 0.010[95%confidence interval(CI):0.000-0.040,Z=1.422,P=0.155].The total lymph-ovascular invasion rate was 0.038(95%CI:0.007-0.088,Z=3.026,P=0.002).The total en bloc resection rate was estimated at 0.984(95%CI:0.925-1.000,Z=19.463,P=0.000).The total complete and incomplete resection rates were estimated at 0.785(95%CI:0.596-0.928,Z=9.789,P=0.000)and 0.188(95%CI:0.016-0.468,Z=2.531,P=0.011),*** total procedureassociated gastric hemorrhage and perforation rates were estimated at 0.026(95%CI:0.005-0.061,Z=3.006 P=0.003)and 0.004(95%CI:0.000-0.028,Z=0.938,P=0.348),*** curative resection,vertical margin invasion,and lateral margin invasion rates were 72.1%(145/341),2.3%(8/348),and 34.45%(41/119),*** ESD constitutes a promising therapeutic approach for early undifferentiated SRC gastric ***,further improvements are required for increasing its treatment efficacy and reducing adverse outcomes.

关键词： Endoscopic submucosal dissection Endoscopy Early gastric cancer Signet ring cell Metaanalysis

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

Characteristics of the HIV/AIDS Epidemic among People Aged≥50 Years in China during 2018–2021

引用

Biomedical and Environmental Sciences 2024年第4期37卷 399-405页

作者： HOU Yu Shan JIN Yi Chen cai chang TANG Hou Lin QIN Qian Qian LYU Fan National Center for AIDS/STD Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China

Objective This study aimed to determine the current epidemiological status of PLWHA aged≥50 years in China from 2018 to *** also aimed to recommend targeted interventions for the prevention and treatment of HIV/AIDS in elderly *** Data on newly reported cases of PLWHA,aged≥50 years in China from 2018 to 2021,were collected using the *** tests and spatial analyses were also *** Between 2018 and 2021,237,724 HIV/AIDS cases were reported among patients aged≥50 years in *** main transmission route was heterosexual transmission(91.24%).Commercial heterosexual transmission(CHC)was the primary mode of transmission among males,while non-marital non-CHC([NMNCHC];60.59%)was the prevalent route in *** proportion of patients with CHC decreased over time(Z=67.716,P<0.01),while that of patients with NMNCHC increased(Z=153.05,P<0.01).The sex ratio varied among the different modes of infection,and it peaked at 17.65 for *** spatial analysis indicated spatial clustering,and the high-high clustering areas were mainly distributed in the southwestern and central-southern *** In China,PLWHA,aged≥50 years,were predominantly infected through heterosexual *** primary modes of infection were CHC and *** were variations in the sex ratio among different age groups,infected through various sexual ***/AIDS cases exhibited spatial *** on these results,the expansion of HIV testing,treatment,and integrated behavioral interventions in high-risk populations is recommended to enhance disease detection in key regions.

关键词： HIV/AIDS Aged≥50 years 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

Sensor configuration for distributed passive localization system in ocean acoustic field

引用

Chinese Journal of Acoustics 2021年第2期40卷 209-223页

作者： ZHOU Rongyan CHEN Jianfeng YAN Qingli cai chang School of Marine Science and Technology Northwest Polytechnic UniversityXi'an 710072 Nanyang Institute of Technology Nanyang 473000 Xi’an Tianhe Maritime Technologies Co.Ltd. Xi’an 710119

In order to improve the localization accuracy of the distributed passive location system in the ocean acoustic field,a sensor configuration method is proposed based on an adaptive genetic ***,the Cramer-Rao lower bound(CRLB)of location error is deduced based on the time of arrival(TOA)localization algorithm in the uniform field and the ocean acoustic ***,the ocean acoustic field is simulated by the BELLHOP *** transfer function between the arbitrary target and the received signal of any sensor can be attained via this ***,the concept of the equivalent acoustic velocity is *** the target is uniformly distributed in the ocean acoustic field,the adaptive genetic algorithm is adopted to obtain the optimal sensor configuration by minimizing the average *** results show that the optimal sensor configuration can effectively reduce the localization ***,the nonlinear decreasing trend of localization error with the increasing number of sensors is given,which provides the theoretical guidance for engineering applications.

关键词： configuration passive field

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

Biomimetic nanoparticles drive the mechanism understanding of shear-wave elasticity stiffness in triple negative breast cancers to predict clinical treatment

引用

Bioactive Materials 2023年第4期22卷 567-587页

作者： Dongdong Zheng Jin Zhou Lang Qian XueJiao Liu cai chang Shuang Tang Hongbo Zhang Shichong Zhou Department of Ultrasound Fudan University Shanghai Cancer CenterShanghai200032PR China Pharmaceutical Sciences Laboratory Åbo Akademi UniversityFI-00520TurkuFinland Cancer Institute Fudan University Shanghai Cancer CenterShanghai200032PR China Institutes of Biomedical Sciences and Department of Chemistry Fudan UniversityShanghai200032PR China Department of Nuclear Medicine Fudan University Shanghai Cancer CenterShanghai200032PR China Turku Bioscience Center University of Turku andÅbo Akademi UniversityFI-00520TurkuFinland The First Affiliated Hospital of Wenzhou Medical University Wenzhou325000PR China

In clinical practice,we noticed that triple negative breast cancer(TNBC)patients had higher shear-wave elasticity(SWE)stiffness than non-TNBC patients and a higherα-SMA expression was found in TNBC tissues than the non-TNBC ***,SWE stiffness also shows a clear correlation to neoadjuvant response *** elaborate this phenomenon,TNBC cell membrane-modified polylactide acid-glycolic acid(PLGA)nanoparticle was fabricated to specifically deliver artesunate to regulate SWE stiffness through inhibiting CAFs functional *** tested in MDA-MB-231 and E0771 orthotopic tumor models,CAFs functional status inhibited by 231M-ARS@PLGA nanoparticles(231M-AP NPs)had reduced the SWE stiffness as well as attenuated hypoxia of tumor as tumor soil loosening agent which amplified the antitumor effects of paclitaxel and PD1 ***-cell sequencing indicated that the two main CAFs(extracellular matrix and wound healing CAFs)that produces extracellular matrix could influence the tumor SWE stiffness as well as the antitumor effect of ***,biomimetic nanoparticles inhibited CAFs function could attenuate tumor hypoxia by increasing proportion of inflammatory blood vessels and oxygen transport ***,our finding is fundamental for understanding the role of CAFs on affecting SWE stiffness and drugs antitumor effects,which can be further implied in the potential clinical theranostic predicting in neoadjuvant therapy efficacy through non-invasive analyzing of SWE imaging.

关键词： Cancer-associated fibroblasts Biomimetic nanoparticles Shear-wave elasticity imaging Theranostic prediction

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

Disproportionate Increase of New Diagnosis of HIV/AIDS Infection by Sex and Age--China, 2007−2018

引用

China CDC weekly 2020年第5期2卷 69-74页

作者： Yewu Zhang chang cai Xiaofeng Wang Yanfei Li Houlin Tang Jiaqi Ma National Center for Public Health Surveillance and Information Service Chinese Center for Disease Control and PreventionBeijingChina National Center for AIDS/STD Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina.&Joint first authors.

What is already known about this topic?The annual rates of newly diagnosed HIV/AIDS among total population is increasing in China,yet HIV/AIDS in older adults has received little *** is added by this report?The overall rates of new diagnosis of HIV/AIDS per 100,000 populations increased 3.26 and 2.18 times among male and female in all ages from 2007 to 2018,*** adults aged≥60 years,the rate increased 10.41 times(1.35 to 14.06 per 100,000)from 2007 to *** adults aged 60–69 and 70–79 years and female aged 50–59 and 60–69 years had the highest increasing rates among all *** are the implications for public health practice?This study highlights the need to strengthen HIV/AIDS prevention among older *** education and other effective measurements might be used to prevent HIV/AIDS among this group.

关键词： HIV/AIDS prevention diagnosis female

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

Verification of SEU resistance in 65 nm high-performance SRAM with dual DICE interleaving and EDAC mitigation strategies

引用

Nuclear Science and Techniques 2021年第12期32卷 64-76页

作者： Ze He Shi-Wei Zhao Tian-Qi Liu chang cai Xiao-Yu Yan Shuai Gao Yu-Zhu Liu Jie Liu Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

A dual double interlocked storage cell(DICE)interleaving layout static random-access memory(SRAM)is designed and manufactured based on 65 nm bulk complementary metal oxide semiconductor *** single event upset(SEU)cross sections of this memory are obtained via heavy ion irradiation with a linear energy transfer(LET)value ranging from 1.7 to 83.4 MeV/(mg/cm^(2)).Experimental results show that the upset threshold(LETth)of a 4 KB block is approximately 6 MeV/(mg/cm^(2)),which is much better than that of a standard unhardened SRAM with an identical technology node.A 1 KB block has a higher LETth of 25 MeV/(mg/cm^(2))owing to the use of the error detection and correction(EDAC)*** a Ta ion irradiation test with the highest LET value(83.4 MeV/(mg/cm^(2))),the benefit of the EDAC code is reduced significantly because the multi-bit upset proportion in the SEU is increased *** with normal incident ions,the memory exhibits a higher SEU sensitivity in the tilt angle irradiation ***,the SEU cross section indicates a significant dependence on the data *** comprehensively considering HSPICE simulation results and the sensitive area distributions of the DICE cell,it is shown that the data pattern dependence is primarily associated with the arrangement of sensitive transistor pairs in the ***,some suggestions are provided to further improve the radiation resistance of the *** implementing a particular design at the layout level,the SEU tolerance of the memory is improved significantly at a low area ***,the designed 65 nm SRAM is suitable for electronic systems operating in serious radiation environments.

关键词： Double interlocked storage cell(DICE) Error detection and correction(EDAC)code Heavy ion Radiation hardening technology Single event upset(SEU) Static random-access memory(SRAM)

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

基于STEP/XML的集成化工艺信息描述方法研究

引用

计算机集成制造系统 2008年第5期14卷 912-917页

作者：蔡长韬西华大学机械工程与自动化学院四川成都610039

针对计算机辅助工艺设计系统复杂的工艺信息描述问题,提出了一种基于可扩展标记语言的数据描述方法,设计了一种类似"Native-XML数据库"的存储方式,把工艺设计中的大部分信息以可扩展标记语言原始格式存储,将关键信息抽取出来以字段的形... 详细信息

针对计算机辅助工艺设计系统复杂的工艺信息描述问题,提出了一种基于可扩展标记语言的数据描述方法,设计了一种类似"Native-XML数据库"的存储方式,把工艺设计中的大部分信息以可扩展标记语言原始格式存储,将关键信息抽取出来以字段的形式存储,减少了存储实现的难度。探讨了如何通过产品模型数据交换标准中性文件转换器,把计算机辅助设计系统输出的AP203文件转换成AP224文件,计算机辅助工艺设计系统通过AP224中性文件来获取零件的几何和工艺信息,并进行相应的工艺设计。利用STEP AP28所制定的转换规则,将产品模型数据交换标准文件转换为相应的可扩展标记语言中性文件,建立XML schema库,以实现制造信息的数据交换和共享。

关键词：工艺信息模型产品数据交换标准可扩展标记语言应用协议

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

IMAGGS: a radiogenomic framework for identifying multi-way associations in breast cancer subtypes

引用

Journal of Genetics and Genomics 2024年第4期51卷 443-453页

作者： Shuyu Liang Sicheng Xu Shichong Zhou cai chang Zhiming Shao Yuanyuan Wang Sheng Chen Yunxia Huang Yi Guo Department of Electronic Engineering School of Information Science and TechnologyFudan UniversityShanghai 200433China The Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention(MICcai)of Shanghai Shanghai 200032China Shanghai Key Laboratory of Metabolic Remodeling and Health Institute of Metabolism and Integrative BiologyFudan UniversityShanghai 200433China Department of Ultrasound Fudan University Shanghai Cancer CenterDepartment of OncologyShanghai Medical CollegeFudan UniversityShanghai 200032China Department of Breast Surgery Fudan University Shanghai Cancer CenterDepartment of OncologyShanghai Medical CollegeFudan UniversityShanghai 200032China

Investigating correlations between radiomic and genomic profiling in breast cancer(BC)molecular subtypes is crucial for understanding disease mechanisms and providing personalized *** present a well-designed radiogenomic framework image–gene–gene set(IMAGGS),which detects multi-way associations in BC subtypes by integrating radiomic and genomic *** dataset consists of 721 patients,each of whom has 12 ultrasound(US)images captured from different angles and gene mutation *** better characterize tumor traits,12 multi-angle US images are fused using two distinct ***,we analyze complex many-to-many associations between phenotypic and genotypic features using a machine learning algorithm,deviating from the prevalent one-to-one relationship pattern observed in previous *** radiomic and genomic features are screened using these *** addition,gene set enrichment analysis is performed to investigate the joint effects of gene sets and delve deeper into the biological functions of BC *** further validate the feasibility of IMAGGS in a glioblastoma multiforme dataset to demonstrate the scalability of IMAGGS across different modalities and *** together,IMAGGS provides a comprehensive characterization for diseases by associating imaging,genes,and gene sets,paving the way for biological interpretation of radiomics and development of targeted therapy.

关键词： IMAGGS Radiogenomic framework "lmage-gene-geneset"associations Molecular subtypes Breast cancer

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

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：