检索结果-南通市图书馆

维普期刊数据库博看期刊

Simultaneous optimization of conduction and polarization losses in CNT@NiCo compounds for superior electromagnetic wave absorption

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第35期166卷 34-46页

作者： Yongpeng Zhao Zhicheng Lin Li Huang Zitong Meng Hao Yu Xin Kou Zhiyong Zou Peng Huang Yuchao Wang Ding Xi Pengfei Yin Gehong su Zhiqiang Fan zhiping su Dongbei Xu Lujun Pan Lijia Xu College of Mechanical and Electrical Engineering Sichuan Agricultural UniversityYa’an 625000China School of Education Northwest Normal UniversityLanzhou 730000China College of Graduate Sichuan Agricultural UniversityChengdu 610000China College of Science Sichuan Agricultural UniversityYa’an 625000China College of Agriculture Sichuan Agricultural UniversityChengdu 610000China School of Physics Dalian University of TechnologyDalian 116024China

Polarization and conduction losses are the two most crucial dielectric loss mechanisms for carbon-based composites,but their synergistic effects in different frequency bands need to be further *** importantly,for polarization and conduction losses,the strengthening of one party always comes at the expense of the other,which inevitably limits the overall performance of the ***,we have developed a composite of CNT and NiCo hybrid particles via a scalable wet chemical process and an-nealing *** the adjustment of the precursor and the annealing temperature,the conduction and polarization losses of the composite are optimized *** optimized samples achieved the full absorption of the X and Ku bands under conditions of low filling rate and thin *** theoretical and experimental studies have revealed conduction loss and polarization loss laws at different frequency *** synergistic effect of conductive loss and magnetic loss in the low-frequency region ensures that the sample exhibits high microwave dissipation ***,in the medium and high-frequency part,the magnetic loss can be almost ignored and the timely replenishment of polar-ization loss keeps the wave-absorbing performance at a high *** excellent multi-band absorption characteristics make the as-obtained absorbers meet the needs of future applications.

关键词： CNT@NiCo compounds Conduction loss Polarization loss Electromagnetic wave absorption

Phase separation of Nur77 mediates XS561-induced apoptosis by promoting the formation of Nur77/Bcl-2 condensates

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

Acta Pharmaceutica Sinica B 2024年第3期14卷 1204-1221页

作者： Xiaohui Chen Meichun Gao Yongzhen Xia Xin Wang Jingbo Qin Hongying He Weirong Liu Xiaowei Zhang Shuangzhou Peng zhiping Zeng Ying su Xiaokun Zhang School of Pharmaceutical Science Fujian Provincial Key Laboratory of Innovative Drug Target ResearchXiamen UniversityXiamen 361002China NucMito Pharmaceuticals Co. Ltd.Xiamen 361000China Department of Clinical Laboratory the Fifth Affiliated Hospital of Sun Yat-sen UniversityZhuhai 519000China

The orphan nuclear receptor Nur77 is a critical regulator of the survival and death of tumor *** pro-death effect of Nur77 can be regulated by its interaction with Bcl-2,resulting in conversion of Bcl-2 from a survival to *** Bcl-2 is overexpressed in various cancers preventing them from apoptosis and promoting their resistance to chemotherapy,targeting the apoptotic pathway of Nur77/Bcl-2 may lead to new cancer ***,we report our identification of XS561 as a novel Nur77 ligand that induces apoptosis of tumor cells by activating the Nur77/Bcl-2 *** vitro and animal studies revealed an apoptotic effect of XS561 in a range of tumor cell lines including MDA-MB-231 triple-negative breast cancer(TNBC)and MCF-7/LCC2 tamoxifen-resistant breast cancer(TAMR)in a Nur77-dependent *** studies showed XS561 potently induced the translocation of Nur77 from the nucleus to mitochondria,resulting in mitochondria-related ***,XS561-induced accumulation of Nur77 at mitochondria was associated with XS561 induction of Nur77 phase separation and the formation of Nur77/Bcl-2 ***,our studies identify XS561 as a new activator of the Nur77/Bcl-2 apoptotic pathway and reveal a role of phase separation in mediating the apoptotic effect of Nur77 at mitochondria.

关键词： XS561 Nur77 Bcl-2 Apoptosis Mitochondria Phase separation TNBC TAMR

Pulmonary toxicity induced by three forms of titanium dioxide nanoparticles via intra-tracheal instillation in rats

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2009年第5期19卷 573-579页

作者： Ran Liu, Lihong Yin, Yuepu Pu, Geyu Liang, Juan Zhang, Yaoyao su, zhiping Xiao, Bing YeSchool of Public Health, Southeast University, Nanjing 210009, China School of Public Health Southeast University Nanjing 210009 China

Titanium dioxide (TiO2) nanoparticles are in wide commercial use worldwide. To evaluate if acute pulmonary toxicity can be induced by nano-TiO2 particles, rats were intra-tracheally instilled with 0.5, 5, or 50 mg/kg of 5, 21, and 50 nm TiO2 primary particles. Toxic effects were determined with the coefficients of lung tissues to body weight, histopathology, biochemical parameters of blood, activity of lactate dehydrogenase (LDH), alkaline phosphatase (ALP) and acid phosphatase (ACP) in tissues, and the phagocytotic ability of alveolar macrophages (AMs). All the indicators were observed in sacrificed rats one week post-exposure. There was a significant difference of coefficients of pulmonary tissues between the high-dose group and the low-or moderate-dose groups with an exposure of 5 nm TiO2. At the same time, 5 nm TiO2 primary particles increased the activity of LDH and ALP when exposure dose was >5 mg/kg. A significant difference in LDH and ALP activity was observed between the 50 mg/kg group and 0.5 or 5 mg/kg group with exposure of 5 nm TiO2. Lung tissues showed increased ALP activity only if treated with 5 and 50 mg/kg of 21 nm TiO2 particles. There was no significant difference in LDH and ALP activity in the 50 nm TiO2 group and control group. Histo-pathologic examination of lung tissues indicated that the pulmonary response to exposure to TiO2 particles in rats manifested as dose-dependent inflammatory lesions, which mainly consisted of inflltration of inflammatory cells and interstitial thickening. Analysis of uptake of neutral red dye showed that 50 nm TiO2 particles significantly increased phagocytotic ability of AMs compared with controls (Psure with 5 nm TiO2 reduced the phagocytotic ability of AMs when the exposure dose was 50 mg/kg. These results suggest that particle size and exposure dose may have important roles in pulmonary toxicity. The toxic effect of TiO2 nanopar-ticles in lung tissue exhibited a dose-response relationship. A

关键词： Titanium dioxide particles Nanoparticles Pulmonary toxicity Intra-tracheal instillation

基于三维大场景的铁路线路方案优化技术研究及应用

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

铁道标准设计 2023年第10期67卷 15-19页

作者：宿志平明杰宣承吾中铁工程设计咨询集团有限公司北京100055

随着正射影像采集、无人机倾斜摄影、点云激光扫描等技术的发展,在GIS平台中构建三维场景的方法日趋成熟,现有的数字化选线软件多为图形、数据分离的二维设计软件,在GIS平台下开发的具备符合线路设计业务且勘察设计流程的软件较为欠缺,... 详细信息

随着正射影像采集、无人机倾斜摄影、点云激光扫描等技术的发展,在GIS平台中构建三维场景的方法日趋成熟,现有的数字化选线软件多为图形、数据分离的二维设计软件,在GIS平台下开发的具备符合线路设计业务且勘察设计流程的软件较为欠缺,因此,从统筹规划、数据筛选和利用服务进行铁路选线的角度出发,开发GIS平台下的人机交互线路方案优化功能势在必行。将目前三维GIS领域的新技术应用于系统开发中,结合铁路选线的常规调整优化作业流程,提出基于GIS三维大场景中的线路方案优化流程、三维单一及二、三维组合场景下的线路方案优化方法。通过集成线路表达参数、平面交点、断链、纵断面等线路走向控制数据,对优化区域内的线路方案进行空间变换及同步调整,为线路设计提供更加直观、全面的环境信息,以及与之契合的线路空间实体。在铁路大场景系统中开发线路方案优化模块,通过对2.3 km线路方案进行功能应用,验证了本文所提方法的科学性和实用性。

关键词：铁路选线地理信息系统三维大场景倾斜摄影线路方案优化

在线全文

学校读者我要写书评

暂无评论

盘扣式脚手架在模板支架施工中的应用

江苏建材 2023年第5期 86-87页

作者：苏志平厦门中宸集团有限公司福建厦门353100

在当前我国城市化发展水平不断提升背景下,以高层建筑为代表的一系列大型建筑工程涌现并逐渐成为城市建筑的主流形式,而盘扣式脚手架在其中发挥着重要作用,文章介绍了其在模板支架施工中的具体应用。

关键词：盘扣式脚手架模板支架施工应用

维普期刊数据库博看期刊

数字赋能农村公共服务高质量:发展视域、内在逻辑与实践路径

在线全文

学校读者我要写书评

暂无评论

西北农林科技大学学报（社会科学版） 2024年第1期24卷 62-70页

作者：胡志平苏子涵华东政法大学政府管理学院上海201620

数字赋能农村公共服务高质量发展,是中国式现代化的应有之义和重要途径。作为一个发展视域性命题,数字赋能农村公共服务,超越微观服务质量管理逻辑。数字技术突破时空、资源限制,赋能农村公共服务,让农业农村农民提升人力资本、享有数... 详细信息

数字赋能农村公共服务高质量发展,是中国式现代化的应有之义和重要途径。作为一个发展视域性命题,数字赋能农村公共服务,超越微观服务质量管理逻辑。数字技术突破时空、资源限制,赋能农村公共服务,让农业农村农民提升人力资本、享有数字红利与共享公共服务资源,促进微观农民个体的全面发展、中观农业农村现代化与宏观城乡融合发展。公共服务数字化是数字赋能农村公共服务高质量的重要机制,然而现实中存在数字人才、数字基础设施、数字资源配置等三大限度。超越农村公共服务数字化现实限度,要从农民数字素养培养、农村数字基础设施投资、城乡数字公共资源体制改革等方面着力,以更好发挥数字赋能农村公共服务高质量发展的价值作用。

关键词：发展阶段数字赋能农村公共服务高质量发展

维普期刊数据库博看期刊

六艺:从共同资源到一家垄断——孔子与儒家经典之成立

在线全文

学校读者我要写书评

暂无评论

上海交通大学学报（哲学社会科学版） 2024年第7期32卷 1-11页

作者：余治平上海交通大学上海200240

按章太炎的划分,礼乐射御书数为“小六艺”,为王公贵族子弟在小学阶段的必修技能;被孔子删订的《诗》《书》《礼》《乐》《易》《春秋》则为“大六艺”,属于成人教育的“大学之道”,是官员任职前必须学习的待人接物、处事礼仪与一般道... 详细信息

按章太炎的划分,礼乐射御书数为“小六艺”,为王公贵族子弟在小学阶段的必修技能;被孔子删订的《诗》《书》《礼》《乐》《易》《春秋》则为“大六艺”,属于成人教育的“大学之道”,是官员任职前必须学习的待人接物、处事礼仪与一般道理。孔子晚年集中精力编辑、注解、诠释六艺,因“有德无位”而称“述而不作”,渗透思想价值和道义灵魂,总结三代而又超越三代,寄托《春秋》而行“素王”褒贬赏罚之权柄,最终把作为上古道术的六艺演绎为儒家学派独有而专用的文本载体。

关键词：六艺道术儒家经典孔子

基于C^2R和C^2GS^2模型的省域旅游业绩效评价

在线全文

学校读者我要写书评

暂无评论

江苏科技大学学报（自然科学版） 2011年第3期25卷 288-293页

作者：苏志平顾平江苏科技大学南徐学院江苏镇江212004

通过将旅游业的发展视为一个投入产出系统,运用数据包络分析方法中的C2R模型和C2GS2模型对旅游业进行研究,从综合效率、规模效率、技术效率、规模收益等方面对我国省域旅游业进行比较评价,进而提出寻求提升旅游业经营绩效的途径,为旅游... 详细信息

通过将旅游业的发展视为一个投入产出系统,运用数据包络分析方法中的C2R模型和C2GS2模型对旅游业进行研究,从综合效率、规模效率、技术效率、规模收益等方面对我国省域旅游业进行比较评价,进而提出寻求提升旅游业经营绩效的途径,为旅游业决策提供指导.

关键词： C2R模型 C2GS2模型旅游业绩效

磷酸改性对对位芳纶纤维力学性能的影响和破坏机理

在线全文

学校读者我要写书评

暂无评论

材料研究学报 2017年第8期31卷 597-602页

作者：陆赵情苏治平张美云郝杨陕西科技大学轻工科学与工程学院西安710021

研究了磷酸改性对对位芳纶(PPTA)纤维力学性能的影响和破坏机理。测量了PPTA纤维的单丝拉伸强度和力-位移曲线来评价其力学性能,用扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)和X射线衍射(XRD)等手段表征了PPTA纤维改性前后的表面形貌... 详细信息

研究了磷酸改性对对位芳纶(PPTA)纤维力学性能的影响和破坏机理。测量了PPTA纤维的单丝拉伸强度和力-位移曲线来评价其力学性能,用扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)和X射线衍射(XRD)等手段表征了PPTA纤维改性前后的表面形貌、化学结构和结晶度。结果表明,磷酸改性破坏PPTA纤维中韧性较高的皮层结构,使改性后纤维的力-位移曲线的最大断裂载荷点向低位移点偏移,拉伸强度降低。在磷酸改性过程中PPTA分子链中的酰胺键因发生水解反应而断裂,导致PPTA纤维的拉伸强度下降。磷酸改性使结晶不完善的皮层从纤维表面剥离,从而使纤维的结晶度升高,韧性降低;而过高的磷酸改性浓度(40%,质量分数)使纤维的结晶度降低,导致PPTA纤维的拉伸强度显著降低。

关键词：有机高分子材料对位芳纶纤维磷酸改性力学性能破坏机理