检索结果-南通市图书馆

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

建筑蓄热原理及其设计参数

科学通报 2024年第11期69卷 1475-1490页

作者：刘衍毕冰藤乔宇豪杨柳刘加平绿色建筑全国重点实验室西安710055 西安建筑科技大学建筑学院西安710055 西安建筑科技大学交叉创新研究院西安710055

建筑蓄热是解决建筑热流作用不稳定的核心,通过建筑设计的方式,将建筑部件的“削峰填谷”效应与其他因素耦合,使建筑对热流的调控作用最大化,实现对室内热环境的优化.本文对建筑蓄热相关概念做了辨析,将“建筑蓄热”与“围护结构蓄热”... 详细信息

建筑蓄热是解决建筑热流作用不稳定的核心,通过建筑设计的方式,将建筑部件的“削峰填谷”效应与其他因素耦合,使建筑对热流的调控作用最大化,实现对室内热环境的优化.本文对建筑蓄热相关概念做了辨析,将“建筑蓄热”与“围护结构蓄热”,“保温”与“隔热”,“热惰性”、“热质量”以及“热惰性指标”等相似概念进行区分,总结了建筑蓄热的作用原理和基础模型,揭示了各向异性太阳辐射多过程传输与转化形成的“双高波谷温度波”效应,和部件蓄热、自然通风与长波辐射降温多种热作用形成的“双低波峰温度波”效应,提出了能够表征建筑系统蓄热能力的指标参数.通过对蓄热问题历史发展背景的挖掘和对相关研究现状的梳理,总结了我国在建筑蓄热研究中存在的问题.建筑蓄热在不同气候条件下的应用潜力差异显著,将相关气候指标应用到建筑热工设计分区之中是当务之急;建筑热工设计过度追求构件高指标,实际则是建筑整体低性能,亟需构建以建筑蓄热为代表的热工设计综合指标体系;亟需加强建筑蓄热基础理论研究,强化建筑蓄热与建筑设计之间的联系.

关键词：建筑节能建筑蓄热建筑热工建筑热流围护结构

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

基于区块链的用户自定义位置共享方案

浙江大学学报（工学版） 2024年第4期58卷 655-663页

作者：申自浩刘梦珂王辉刘沛骞刘琨河南理工大学计算机科学与技术学院河南焦作454000 河南理工大学软件学院河南焦作454000

针对移动社交网络位置共享服务存在的隐私泄漏问题,提出基于区块链的用户自定义位置共享(BUDLS)方案.基于区块链实现位置信息分布式管理,防止中央服务器收集大量用户隐私,增强用户位置信息的可控性.设计基于公钥数字签名和同态加密相结... 详细信息

针对移动社交网络位置共享服务存在的隐私泄漏问题,提出基于区块链的用户自定义位置共享(BUDLS)方案.基于区块链实现位置信息分布式管理,防止中央服务器收集大量用户隐私,增强用户位置信息的可控性.设计基于公钥数字签名和同态加密相结合的加密机制,防止位置信息被攻击者非法获取.定义灵活的访问控制策略,根据用户需要提供可靠的服务.安全分析验证结果显示,BUDLS方案满足隐私安全目标.仿真实验结果表明,相比传统方案,BUDLS方案降低了时间成本,提高了位置查询的准确性,有效保护了移动社交网络平台用户的位置隐私.

关键词：移动社交网络区块链位置共享位置隐私同态加密

同方期刊数据库

Activation of biomass-derived porous carbon for supercapacitors:A review

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第7期35卷 121-138页

作者： Zixuan guo Xiaoshuai Han Chunmei Zhang Shuijian He Kunming liu Jiapeng Hu Weisen Yang Shaoju Jian Shaohua Jiang gaigai Duan Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China Institute of Materials Science and Devices Suzhou University of Science and TechnologySuzhou 215009China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China Fujian Provincial Key Laboratory of Eco-Industrial green Technology Key Laboratory of Green Chemical Technology of Fujian Province UniversityCollege of Ecological and Resources EngineeringWuyi UniversityWuyishan 354300China

Due to the advantages of renewable,low pollution and wide distribution of biomass resources,it is selected as the electrode material for *** carbon-based electrode materials,specific surface area and pore structure have a great *** and summarizing the influence of activation on pore structure will greatly broaden this *** on the activation mechanism of activator,this paper summarizes the latest progress of biomass activation applied to supercapacitors,including traditional physical and chemical activation methods and non-traditional methods such as biological activation method,self-activation method,template assisted activation method and green activator ***,the challenges,strategies and prospects for the future development of biomass-derived carbon material activation are pointed *** summary,this review will help researchers choose appropriate strategies to design biomass-derived carbon electrode materials for supercapacitors,thereby promoting the application of biomass materials.

关键词： Biomass-derived Activation Pore structure Electrochemistry Supercapacitor

Potentials of ribosomopathy gene as pharmaceutical targets for cancer treatment

在线全文

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2024年第3期14卷 308-320页

作者： Mengxin Wang Stephen Vulcano Changlu Xu Renjian Xie Weijie Peng Jie Wang Qiaojun liu Lee Jia Zhi Li Yumei Li Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province Gannan Medical UniversityGanzhouJiangxi341000China School of Rehabilitation Medicine Gannan Medical UniversityGanzhouJiangxi341000China Autoimmunity and Inflammation Program HSS Research InstituteHospital for Special Surgery New YorkNew YorkNY10021USA Division of Oral and Systemic Health Sciences School of DentistryUniversity of CaliforniaLos AngelesCA90095USA School of Medical Information Engineering Gannan Medical UniversityGanzhouJiangxi341000China Inflammation and Immune Mediated Diseases Laboratory of Anhui Province Anhui Institute of Innovative DrugsInstitute for Liver Diseases of Anhui Medical UniversitySchool of PharmacyAnhui Medical UniversityHefei230032China School of Basic Medicine Gannan Medical UniversityGanzhouJiangxi341000China Institute of Oceanography Minjiang UniversityFuzhou350108China

Ribosomopathies encompass a spectrum of disorders arising from impaired ribosome biogenesis and reduced *** or dysexpression of the genes that disturb any finely regulated steps of ribosome biogenesis can result in different types of ribosomopathies in clinic,collectively known as ribosomopathy *** data suggest that ribosomopathy patients exhibit a significantly heightened susceptibility to *** ribosome biogenesis and dysregulation of some ribosomopathy genes have also been found to be intimately associated with cancer *** correlation between ribosome biogenesis or ribosomopathy and the development of malignancies has been well *** work aims to review the recent advances in the research of ribosomopathy genes among human cancers and meanwhile,to excavate the potential role of these genes,which have not or rarely been reported in cancer,in the disease development across *** plan to establish a theoretical framework between the ribosomopathy gene and cancer development,to further facilitate the potential of these genes as diagnostic biomarker as well as pharmaceutical targets for cancer treatment.

关键词： Ribosome biogenesis Ribosomopathy gene Cancer treatment target Pharmaceutical target

炭黑负载增加活性炭缺陷位点催化甲烷裂解制氢机理研究

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

煤炭科学技术 2024年第3期52卷 300-310页

作者：杨丽刘帅辛春梅刘鲁曾星扬刘方中国矿业大学低碳能源与动力工程学院江苏徐州221116

在“双碳”目标时代背景下,甲烷催化裂解制氢因无CO_(2)排放被认为是一种很有前途的高纯制氢技术。其中针对碳基催化剂改性的研究是一大关注热点。为提高活性炭(Activated Carbon,AC)催化剂的稳定性,提出了以椰壳活性炭负载科琴黑炭黑(C... 详细信息

在“双碳”目标时代背景下,甲烷催化裂解制氢因无CO_(2)排放被认为是一种很有前途的高纯制氢技术。其中针对碳基催化剂改性的研究是一大关注热点。为提高活性炭(Activated Carbon,AC)催化剂的稳定性,提出了以椰壳活性炭负载科琴黑炭黑(Carbon Black,CB)制备的新型催化剂,并对其进行了表征测试分析、催化甲烷裂解实验以及分子模拟计算。实验结果表明:分散剂使用1 g、AC和CB质量配比8∶2时制备的催化剂具有较好的催化性能,反应温度在1000℃时初始活性高达85%以上,延缓失活15 min,反应中期甲烷转化率比AC最高提升8%左右。这是因为CB负载在AC表面经反应生成具有缺陷位点的沉积碳。分子模拟计算结果显示,主要是拓扑缺陷的存在使得其s、p轨道非局域性增大,提高其甲烷吸附性能,促进反应进行。同时,AC表面的微孔以及羧基、羰基、羟基等含氧官能团也对甲烷分子的吸附有不同程度的促进作用。孔径为0.8 nm时吸附热最大,这意味着微孔的存在有利于甲烷在AC上吸附,特别是小微孔;3种官能团均可以促进甲烷在AC表面的吸附,其中羧基促进作用更好,羰基和羟基效果相差不大。

关键词：甲烷催化裂解活性炭炭黑缺陷结构

基于模型定义的光学遥感卫星星上处理系统设计

在线全文

学校读者我要写书评

暂无评论

测绘学报 2024年第4期53卷 689-699页

作者：刘薇刘松林郭子博刘凯张荔哲智慧地球重点实验室北京100029 西安测绘研究所陕西西安710054 西安电子科技大学陕西西安710071 中国空间技术研究院西安分院陕西西安710000

本文提出了一种基于模型定义的光学遥感卫星星上处理系统设计方法,构建了“硬件资源-算子模块-通用处理核-典型应用”的星上处理任务行为模型范式。在硬件层面,采用星上异构嵌入式计算平台,将多处理器一体化设计,通过标准化高速数据互连... 详细信息

本文提出了一种基于模型定义的光学遥感卫星星上处理系统设计方法,构建了“硬件资源-算子模块-通用处理核-典型应用”的星上处理任务行为模型范式。在硬件层面,采用星上异构嵌入式计算平台,将多处理器一体化设计,通过标准化高速数据互连,完成高速信号传输和数据处理;通过网络拓扑实现良好的扩展性,支持设备规模及数据处理复杂性的变化;在软件层面,针对星上智能处理任务中频繁数据读写操作、大量重复计算操作、卷积神经网络的通用计算与加速等需求,设计了星上平台指令集、星上算法通用算子和星上智能网络组件组成的可配置算子模块,并基于该模块可快速实现特定算法的硬件IP核。经仿真试验验证,本文方法可根据卫星平台和星上处理任务需求,按需适配最佳软硬件解决方案,并有效提高了计算资源利用率;提出的结合云检测的实时流水压缩编码方案,显著提升了压缩性能;设计的轻量化目标检测识别方法,计算资源效率达到91.5%;以高分一号、高分七号原始数据率为例进行分析,相比常规方案整体计算资源利用率分别提高了16.51%、17.77%。实现了星上处理系统研制过程模型化、工作模式可定义、逻辑资源共享化,是适应卫星小型化、快速部署的一种合理优化选择。

关键词：遥感卫星星上处理模型定义按需适配异构计算

维普期刊数据库博看期刊

同方期刊数据库

Autophagy plays a pro-apoptotic role in arsenic trioxide-induced cell death of liver cancer

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Medicine 2024年第3期22卷 295-302页

作者： Zhengting Deng Shufang Liang guokai Huang Yuqian Wang Xiaoyu Tu Yani Zhang Shu Li Tao liu Binbin Cheng Taizhou Hospital of Traditional Chinese Medicine Nanjing University of Chinese MedicineTaizhou 225300Jiangsu ProvinceChina Oncology Department of Traditional Chinese Medicine The First Affiliated Hospital of Naval Medical UniversityShanghai 200433China School of Traditional Chinese Medicine Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Department of gastroenterology Baoshan Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 201900China

Objective: The effects of arsenic trioxide(As2O3) on hepatocellular carcinoma have been documented widely. Autophagy plays dual roles in the survival and death of cancer cells. Therefore, we investigated the exact role of autophagy in As2O3-induced apoptosis in liver cancer ***: The viability of hepatoma cells was determined using the MTT assay with or without fetal bovine serum. The rate of apoptosis in liver cancer cells treated with As2O3was evaluated using flow cytometry, Hoechst 33258 staining, and TUNEL assays. The rate of autophagy among liver cancer cells treated with As2O3was detected using immunofluorescence, Western blot assay and transmission electron ***: Upon treatment with As2O3, the viability of Hepg2 and SMMC-7721 cells was decreased in a time-and dose-dependent manner. The apoptosis rates of both liver cancer cell lines increased with the concentration of As2O3, as shown by flow cytometry. Apoptosis in liver cancer cells treated with As2O3was also shown by the activation of the caspase cascade and the regulation of Bcl-2/Bax ***, As2O3treatment induced autophagy in liver cancer cells;this finding was supported by Western blot, immunofluorescence of LC3-II and beclin 1, and transmission electron microscopy. In liver cancer cells, As2O3inhibited the phosphoinositide 3-kinase/protein kinase B/mammalian target of rapamycin(PI3K/AKT/mTOR) signal pathway that plays a vital role in both apoptosis and autophagy. The PI3K activator SC-79 partially reversed As2O3-induced autophagy and apoptosis. Furthermore, inhibiting autophagy with 3-methyladenine partially reversed the negative effects of As2O3on cell *** starvation increased autophagy and amplified the effect of As2O3on cell ***: As2O3induces apoptosis and autophagy in liver cancer cells. Autophagy induced by As2O3may have a proapoptotic effect that helps to reduce the viability of liver cancer cells. This study provides novel insights

关键词： Apoptosis Arsenic trioxide Autophagy Primary liver cancer

在线全文

学校读者我要写书评

暂无评论

空间站组合臂安装载荷的自主安全操控策略

宇航学报 2024年第2期45卷 303-313页

作者：刘冬雨刘宏刘业超谢宗武高升北京空间飞行器总体设计部北京100094 哈尔滨工业大学机器人技术与系统全国重点实验室哈尔滨150001

针对空间站暴露载荷操作任务,提出一种组合臂安装载荷的自主安全操控策略。该策略由机械臂末端视觉伺服进行安装操作的精细初定位,克服天地差异、舱体充压变形、组合臂大范围开环运动等误差影响,为机械臂安装载荷提供准确的初始条件;由... 详细信息

针对空间站暴露载荷操作任务,提出一种组合臂安装载荷的自主安全操控策略。该策略由机械臂末端视觉伺服进行安装操作的精细初定位,克服天地差异、舱体充压变形、组合臂大范围开环运动等误差影响,为机械臂安装载荷提供准确的初始条件;由力控制和自主交互流程进行载荷对接安装,适应载荷对接前残余位姿偏差,减少天地、机械臂与载荷交互时间、力控制持续时间,降低宏微机械臂间动力学耦合影响,自主柔顺和安全完成载荷插拔操作。该操控策略经过地面仿真和试验验证,并成功应用在组合臂操作舱外暴露载荷任务中,确保空间站载荷安装任务圆满成功。

关键词：空间站空间载荷安装空间机械臂精细操作力控制

miR-378a-3p responds to physical activity by modulating insulin-mediated glucose uptake and tricarboxylic acid cycle in skeletal muscle

在线全文

学校读者我要写书评

暂无评论

genes & Diseases 2024年第3期11卷 98-101页

作者： Zishuai Wang Yilong Yao Xinhua Hou Danyang Fan Yanwen liu Adeyinka Abiola Adetula Yalan Yang kui Li Zhonglin Tang Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong518000China Kunpeng Institute of Modern Agriculiture at Foshan Chinese Academy of Agricultural SciencesFoshanGuangdong528226China guangXi Engineering Centre for Resource Development of Bama Xiang Pig BamaGuangxi 547500China Institute of Animal Science Chinese Academy of Agricultural SciencesBeijing100193China

Aerobic exercise training alters gene expression in skeletal muscle,and miRNAs significantly contribute to motion ***,the molecular mechanisms by which miRNAs regulate the response to exercise training are not well ***,we found that the abundance of miR-378a-3p in skeletal muscle significantly decreased after exercise ***-378a-3p knockout mice showed increased insulin sensitivity,insulin-mediated glucose uptake.

关键词： skeletal miR uptake