检索结果-南通市图书馆

NiCoO2/NiCoP@Ni nanowire arrays:tunable composition and unique structure design for high-performance winding asymmetric hybrid supercapacitors

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2020年第9期39卷 1034-1044页

作者： wei-wei ning Li-Bao Chen wei-Feng wei Yue-Jiao Chen Xiao-Yong Zhang State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Transition metal phosphides(TMPs)are recognized as such promising supercapacitor materials for the practical application,due to their superior electrical conductivity and excellent redox ***,self-supported three-dimensional NiCoP nanoparticles embedded in NiCoO2 nano wires(NiCoO2/NiCoP)electrode consisting of nickel cobalt phosphides(NiCoP)with high activity and nickel cobalt oxides(NiCoO2)with good stability were fabricated by a hydrothermal and phosphorization *** electrode integrates the advantages of nanowire arrays for fast ion transport and foam Ni for effective charge transport and *** the proper composition control of the nanohybrid and unique structure design,the optimized NiCoO2/NiCoP-20 exhibits a high specific capacitance of 3204 F·g-1 at 1 A·g-1 in 3 mol·L-1 KOH aqueous electrolyte in a three-electrode ***,the asymmetric supercapacitor assembled with the prepared NiCoO2/NiCoP-20 and activated carbon achieves a specific capacitance of 116 F·g-1 with a high energy density of 40.32 Wh·kg-1 at the power density of 800.18 W·*** practical application is further demonstrated with all-solid-state winding supercapacitor devices,with decent flexibility,in series to light the Central South University(CSU)logo consisting of 21 red LED indicators.

关键词： Transition metal phosphides Tunable composition All-solid-state Flexibility Winding supercapacitor

The protective effects against noise trauma by sound conditioning in rats

在线全文

学校读者我要写书评

暂无评论

Journal of Otology 2009年第1期4卷 59-60页

作者： ZHAI Suo-qiang,GUO wei-wei,YU ning Institute of Otorhinolaryngology,General Hospital of PLA,Beijing 100853 Institute of Otorhinolaryngology General Hospital of PLA Beijing 100853

Objective To investigate the protective effects of sound conditioning against subsequent high -level noise trauma in *** Rats were exposed to a 4 kHz octave band noise at 95 dB SPL for 10 hours,then to a traumatic exposure dose(105 dB SPL for 13 hours) delivered 12h *** animals were exposured to the traumatic dose *** thresholds were obtained before and after noise *** Animals that had been sound conditioned demonstrated less ABR threshold shift compared to those that had *** Moderate level sound exposure appears to have a toughening effect on the rat cochlea(or'conditioning') leading to decreased hearing loss from subsequent traumatic exposure.

关键词： sound conditioning noise trauma rat

Central Place Theory and Distribution of Post Offices in Cities

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2000年第Z1期 89-93页

作者： WANG wei-min, WANG wei-ning (1 Department of Postal Communication Management Shijiazhuang Postal College, Shijiazhuang 050021, P.R.China 2 The Management and Humanities Institute, Beijing University of Posts and Telecommunications, Beijing 100876, P.R.

The feasibility of application of the Central Place Theory in the distribution of post offices in cities is analysed, the grade scale structure and space distribution structure Shijiazhauang of post offices in city are studied, the research results prove the actual value of the Central Place Theory, and the suggestion of adjustment in the space distribution Shijiazhuang of post offices in city is put forward.

关键词： post office, center grade scale structure space distribution structure service district central place theory

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

面向云存储的多维球面门限秘密共享方案

软件学报 2016年第11期27卷 2912-2928页

作者：谭振华杨广明王兴伟程维宁婧宇东北大学软件学院辽宁沈阳110819

近年来,云存储所提供的"数据存储即服务"为租户实现廉价高效共享资源.由于租户缺乏对云端数据的绝对控制,数据安全,尤其是机密数据的安全存储成为一大问题,这也是近年来云存储安全的研究热点.针对机密数据的云存储问题,提出了一种基于... 详细信息

近年来,云存储所提供的"数据存储即服务"为租户实现廉价高效共享资源.由于租户缺乏对云端数据的绝对控制,数据安全,尤其是机密数据的安全存储成为一大问题,这也是近年来云存储安全的研究热点.针对机密数据的云存储问题,提出了一种基于多维球面原理的分布式秘密共享方案.在分发阶段,结合分发者、云存储容器信息,将原始秘密转换为m维球心坐标,进而生成同球面的n个影子秘密坐标,并将这些影子秘密作为机密数据分布式存储在n个云存储容器中.在恢复阶段,通过证明任意k(k=m+1)个线性不相关的坐标可确定唯一球心,完成原始秘密的恢复.算法性能分析和仿真分析表明,该方案具备假数据攻击、共谋攻击防御能力,且密钥不需要额外的管理开销,租户对密钥有绝对控制权,加强了租户对云数据的控制,在运算性能、存储性能方面正确、有效.

关键词：云存储安全可验证秘密共享数据保护数据存储即服务

在线全文

学校读者我要写书评

暂无评论

CNG储气井井壁腐蚀检测系统

四川大学学报（工程科学版） 2011年第6期43卷 243-247页

作者：王珩苏真伟卫攸宁刘小平四川大学制造科学与工程学院四川成都610065

高压天然气地下储气井是实现节能减排的重要途径。针对其特点,提出了一种基于超声波和视频检测的人机交互式的井壁腐蚀检测系统。系统由地面部分和井下部分组成。检测时井下超声波探头和摄像头在获取信号的同时,以可调的速度旋转上升;... 详细信息

高压天然气地下储气井是实现节能减排的重要途径。针对其特点,提出了一种基于超声波和视频检测的人机交互式的井壁腐蚀检测系统。系统由地面部分和井下部分组成。检测时井下超声波探头和摄像头在获取信号的同时,以可调的速度旋转上升;用户通过地面计算机可以观察、分析、记录和实时控制井壁厚度超声波检测和井内壁视频检测。重点介绍了系统结构和工作原理,超声波信号的检测、传输和处理方法,以及井下成像检测的硬件设计和软件设计。实验室和现场实验表明:系统的检测速度和精度均达到了预定要求。这一技术为CNG储气井的安全运行提供了新的保证。

关键词： CNG储气井腐蚀检测系统超声检测井下成像人机交互

Müller cells are activated in response to retinal outer nuclear layer degeneration in rats subjected to simulated weightlessness conditions

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 2116-2128页

作者： Yuxue Mu ning Zhang Dongyu wei Guoqing Yang Lilingxuan Yao Xinyue Xu Yang Li Junhui Xue Zuoming Zhang Tao Chen Aerospace Clinical Medical Center School of Aerospace MedicineAir Force Medical UniversityXi’anShaanxi ProvinceChina Department of Aviation Medicine Xijing HospitalAir Force Medical UniversityXi’anShaanxi ProvinceChina Department of Emergency Medicine Wuhan No.1 HospitalWuhanHubei ProvinceChina Third Regiment School of Basic MedicineAir Force Medical UniversityXi’anShaanxi ProvinceChina Fourth Regiment School of Basic MedicineAir Force Medical UniversityXi’anShaanxi ProvinceChina

A microgravity environment has been shown to cause ocular damage and affect visual acuity,but the underlying mechanisms remain ***,we established an animal model of weightlessness via tail suspension to examine the pathological changes and molecular mechanisms of retinal damage under *** 4 weeks of tail suspension,there were no notable alterations in retinal function and morphology,while after 8 weeks of tail suspension,significant reductions in retinal function were observed,and the outer nuclear layer was thinner,with abundant apoptotic *** investigate the mechanism underlying the degenerative changes that occurred in the outer nuclear layer of the retina,proteomics was used to analyze differentially expressed proteins in rat retinas after 8 weeks of tail *** results showed that the expression levels of fibroblast growth factor 2(also known as basic fibroblast growth factor)and glial fibrillary acidic protein,which are closely related to Müller cell activation,were significantly *** addition,Müller cell regeneration and Müller cell gliosis were observed after 4 and 8 weeks,respectively,of simulated *** findings indicate that Müller cells play an important regulatory role in retinal outer nuclear layer degeneration during weightlessness.

关键词： glial fibrous acidic protein gliosis Müller cells nerve growth factor neural differentiation neurodegeneration proteomic retinal degeneration retinal outer nuclear layer simulated weightlessness

Loss-of-function mutations of microRNA-142-3p promote ASH1L expression to induce immune evasion and hepatocellular carcinoma progression

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2025年第1期31卷 126-145页

作者： Xing-Hui Yu Yan Xie Jian Yu Kun-ning Zhang Zhou-Bo Guo Di Wang Zhao-Xian Li wei-Qi Zhang Yu-Ying Tan Li Zhang Wen-Tao Jiang School of Medicine Nankai UniversityTianjin 300192China Tianjin Key Laboratory of Molecular Diagnosis and Treatment of Liver Cancer Tianjin First Center HospitalTianjin 300192China Department of Liver Transplantation Tianjin First Center HospitalTianjin 300192China First Central Clinical School Tianjin Medical UniversityTianjin 300192China

BACKGROUND Hepatocellular carcinoma(HCC)has been a pervasive malignancy throughout the world with elevated *** therapeutic targets are beneficial to treat and predict the ***,the exact molecular mechanisms leading to the progression of HCC are still *** has shown that the microRNA-142-3p level decreases in HCC,whereas bioinformatics analysis of the cancer genome atlas database shows the ASH1L expression increased among liver tumor *** this paper,we will explore the effects and mechanisms of microRNA-142-3p and ASH1L affect the prognosis of HCC patients and HCC cell bioactivity,and the association between *** To investigate the effects and mechanisms of microRNA-142-3p and ASH1L on the HCC cell bioactivity and prognosis of HCC *** In this study,we grouped HCC patients according to their immunohistochemistry results of ASH1L with pathological tissues,and retrospectively analyzed the prognosis of HCC ***,explored the roles and mechanisms of microRNA-142-3p and ASH1L by cellular and animal experiments,which involved the following experimental methods:Immunohistochemical staining,western blot,quantitative real-time-polymerase chain reaction,flow cytometric analysis,tumor xenografts in nude mice,*** statistical methods involved in this study contained t-test,one-way analysis of variance,theχ^(2)test,the Kaplan-Meier approach and the log-rank *** In this study,we found that HCC patients with high expression of ASH1L possess a more recurrence rate as well as a decreased overall survival ***1L promotes the tumorigenicity of HCC and microRNA-142-3p exhibits reduced expression in HCC tissues and interacts with ASH1L through targeting the ASH1L 3′untranslated ***,microRNA-142-3p promotes apoptosis and inhibits proliferation,invasion,and migration of HCC cell lines in vitro via *** the exploration mechanism,we found ASH1L may promote an immunosuppressive mi

关键词： Hepatocellular carcinoma MicroRNA-142-3p ASH1L Immune evasion Tumor immune microenvironment Apoptosis

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

地铁路基段噪音治理方案研究

江苏建筑 2017年第4期 113-115,120页

作者：邢崴崴王宁南京地铁建设有限责任公司江苏南京210017

城市轨道交通引起的环境振动和噪声污染问题日益突出,对周边居民生活起居会造成一定影响,在工程建设中应予以高度重视。文章依托某城市地铁路基段噪音实例,根据现场噪音实测数据,对噪音源进行数据模拟分析,并对目前直立声屏障及顶端降... 详细信息

城市轨道交通引起的环境振动和噪声污染问题日益突出,对周边居民生活起居会造成一定影响,在工程建设中应予以高度重视。文章依托某城市地铁路基段噪音实例,根据现场噪音实测数据,对噪音源进行数据模拟分析,并对目前直立声屏障及顶端降噪器、自动顶面润滑系统、约束阻尼轮轨降噪板、可动心轨道岔等措施的降噪效果进行综合比较,最终确定本工程实施方案。通过研究,对各种降噪措施的适用范围、降噪效果均有了较深入的理解,对今后类似工程具有参考价值。

关键词：地铁噪音声屏障轨道减振降噪

过表达TaPK-R1基因增强了小麦对纹枯病的抗性和耐冻性

在线全文

学校读者我要写书评

暂无评论

作物学报 2016年第11期42卷 1601-1608页

作者：罗美英荣玮魏学宁杨坤徐惠君禤维言张增艳广西大学农学院广西南宁530004 中国农业科学院作物科学研究所/农作物基因资源与基因改良国家重大科学工程/农业部麦类生物学与遗传育种重点实验室北京100081

小麦纹枯病菌（Rhizoctonia cerealis）和倒春寒是小麦生产中重要的生物和非生物胁迫因子,本研究目的是利用转基因技术改良小麦的纹枯病抗性和耐冷性。利用构建的转基因载体pAHC25-MYC-Ta PK-R1,通过基因枪介导法,将小麦AGC蛋白激酶基因... 详细信息

小麦纹枯病菌（Rhizoctonia cerealis）和倒春寒是小麦生产中重要的生物和非生物胁迫因子,本研究目的是利用转基因技术改良小麦的纹枯病抗性和耐冷性。利用构建的转基因载体pAHC25-MYC-Ta PK-R1,通过基因枪介导法,将小麦AGC蛋白激酶基因TaPK-R1导入春小麦品种扬麦20,获得TaPK-R1过表达的转基因小麦。对T1至T4代植株进行PCR、RT-PCR、qRT-PCR、Westernblot分析,筛选到3个转基因小麦株系,外源TaPK-R1基因能够在其植物体内遗传和超量转录,并翻译成蛋白质。利用致病力不同的***菌株R0301和WK207,分别对3个转基因株系T_1至T_2代和T_3至T_4代进行纹枯病抗性鉴定,发现TaPK-R1过量表达提高了转基因小麦的纹枯病抗性,3个转基因株系各世代的纹枯病平均病级为1.16~2.11,病情指数为23.20~42.10,而对照扬麦20的纹枯病病级为2.55~3.60,病情指数为51.00~72.00。用-9℃低温处理三叶一心期小麦幼苗24 h,对照扬麦20的存活率为17%,3个转基因小麦株系的存活率分别为52%、79%和96%。上述结果表明,TaPK-R1过量表达能显著增强小麦对纹枯病的抗性及对冻害的耐受性,所获得的3个转基因小麦株系可作为潜在的抗源材料。

关键词：小麦纹枯病蛋白激酶 TaPK-R1 冻害