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

远程电话自动抄表系统在热网监测中的应用

计量技术 2000年第9期 44-45页

作者：张蔚琳济南明湖热电厂济南250033

一、引言目前,就我厂而言,蒸汽用户的流量计量存在两个问题:一是不能及时反馈用户蒸汽的压力、温度、瞬时流量等参数数据;二是不能及时发现仪表停电和仪表故障.因此,既影响了流量计量的准确性,也影响了经济效益.为此,在外网监测中,应用... 详细信息

一、引言目前,就我厂而言,蒸汽用户的流量计量存在两个问题:一是不能及时反馈用户蒸汽的压力、温度、瞬时流量等参数数据;二是不能及时发现仪表停电和仪表故障.因此,既影响了流量计量的准确性,也影响了经济效益.为此,在外网监测中,应用远程电话自动抄表系统,利用现有的电话网络,对有关数据进行采集,及时反馈信息,可解决以上问题.

关键词：远程电话自动抄表系统热网监测流量仪表

当代图书馆的媒介形象建构——以《人民日报》2009-2018年报道为例

在线全文

学校读者我要写书评

暂无评论

图书馆论坛 2020年第1期40卷 96-104页

作者：张蔚林陈幼华上海交通大学图书馆

文章以《人民日报》的图书馆报道为研究对象,以话语分析和框架理论为支撑,运用内容分析法分析新闻的篇幅、版面、体裁、基调、报道议题、图书馆地域分布等,归纳当代图书馆的六大媒介形象:心灵避风港和知识天堂、边缘化的阅读场所、内忧... 详细信息

文章以《人民日报》的图书馆报道为研究对象,以话语分析和框架理论为支撑,运用内容分析法分析新闻的篇幅、版面、体裁、基调、报道议题、图书馆地域分布等,归纳当代图书馆的六大媒介形象:心灵避风港和知识天堂、边缘化的阅读场所、内忧外患的组织机构、融合共享的文化服务平台、在数字化浪潮中生长的有机体、工作生活相融合的第三空间。建议图书馆优化媒介形象:打造特色服务,树立品牌形象;开展系列活动,与媒体常规互动;紧跟国家政策,定位发展目标。

关键词：图书馆媒介形象人民日报新闻报道

Intensified tectonic deformation and uplift of the Altyn Tagh range recorded by rock magnetism and growth strata studies of the western Qaidam Basin, NE Tibetan Plateau

在线全文

学校读者我要写书评

暂无评论

Intensified tectonic deformation and uplift of the Altyn Tag...

PriChain: Efficient Privacy-preserving Finegrained Redactable Blockchains in Decentralized Settings

2015中国地球科学联合学术年会

作者： Tao zhang Wenxia Han Xiaomin Fang weilin zhang Chunhui Song Maodu Yan Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau Research CAS Key Laboratory of Salt Lake Resources and Chemistry Qinghai Institute of Salt Lakes Chinese Academy of Sciences CAS Center for Excellence in Tibetan Plateau Earth Sciences School of Earth Sciences & Key Laboratory of Western China’s Mineral Resources of Gansu Province

The Altyn Tagh range is the tectonically and geographically northern edge of the Tibetan Plateau,precise dating of its activities is essential for understanding the possible mechanisms of the Tibetan Plateau uplift and its effects on climate *** the framework of basin-mountain coupling,both magnetic susceptibility and rock magnetic research were carried out on the Late Cenozoic sediments of the Honggouzi section（7-5 Ma）in the western Qaidam *** study attempts to find out the evolution history of tectonic and climatic changes and to detect their interactions in the Altyn Tagh *** results showed that magnetic susceptibility records kept relatively low and stable values before0Ma,and rapidly increased since0 *** rock magnetic results revealed that paramagnetic minerals,maghemite and hematite have been dominated during the early periods（>10 Ma）in the Honggouzi section,and were replaced by magnetite and maghemite after that time.A detailed comparison of magnetic susceptibility records in the Honggouzi section with tectonic and climate records from the study areas and surrounding regions were also carried *** with sedimentary facies,lithology and angular unconformity in the sequence,as well as seismostratigraphy data,paleocurrent study,provenance and conceptual models analyses,we argue that the0 Ma shift in the HGZ section might be caused by the uplift of the Altyn Tagh range during that time.

关键词： Rock magnetism growth strata tectonic uplift Altyn Tagh range Qaidam Basin

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2024年

作者： Hongchen GUO weilin GAN Mingyang ZHAO Chuan zhang Tong WU Liehuang ZHU Jingfeng XUE School of Computer Science and Technology Beijing Institute of Technology School of Cyberspace Science and Technology Beijing Institute of Technology School of Computer and Communication Engineering University of Science and Technology Beijing

Recently, redactable blockchain has been proposed and leveraged in a wide range of real systems for its unique properties of decentralization, traceability, and transparency while ensuring controllable on-chain data redaction. However, the development of redactable blockchain is now obstructed by three limitations, which are data privacy breaches, high communication overhead, and low searching efficiency, respectively. In this paper, we propose PriC hain, the first efficient privacy-preserving fine-grained redactable blockchain in decentralized settings. PriChain provides data owners with rights to control who can read and redact on-chain data while maintaining downward compatibility, ensuring the one who can redact will be able to read. Specifically, inspired by the concept of multi-authority attribute-based encryption, we utilize the isomorphism of the access control tree, realizing fine-grained redaction mechanism, downward compatibility, and collusion resistance. With the newly designed structure, PriChain can realize O（n） communication and storage overhead compared to prior O（n2） schemes. Furthermore, we integrate multiple access trees into a tree-based dictionary, optimizing searching efficiency. Theoretical analysis proves that PriC hain is secure against the chosen-plaintext attack and has competitive complexity. The experimental evaluations show that PriChain realizes 10× efficiency improvement of searching and 100× lower communication and storage overhead on average compared with existing schemes.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

柴北缘早新生代旋转变形特征及其构造意义

地学前缘 2022年第4期29卷 249-264页

作者：栗兵帅颜茂都张伟林东华理工大学地球科学学院江西南昌330013 中国科学院青藏高原研究所青藏高原地球系统与资源环境国家重点实验室北京100101

青藏高原东北部作为高原北东向扩展的前缘地带,新生代以来变形十分强烈,是研究青藏高原隆升变形过程和生长模式的关键地区之一。然而高原东北部何时卷入印度-欧亚大陆碰撞挤压变形系统以及高原扩展的运动学、动力学过程和机制等仍存在... 详细信息

青藏高原东北部作为高原北东向扩展的前缘地带,新生代以来变形十分强烈,是研究青藏高原隆升变形过程和生长模式的关键地区之一。然而高原东北部何时卷入印度-欧亚大陆碰撞挤压变形系统以及高原扩展的运动学、动力学过程和机制等仍存在很大争议。大陆碰撞及持续挤压过程往往会伴随块体及其内部的旋转变形,而古地磁磁偏角可以定量恢复块体绕垂直轴发生的旋转变形,在研究块体旋转变形方面具有其独特优势。高原东北部,尤其是柴达木盆地,缺乏早新生代的细致旋转变形研究,制约了我们对高原东北部地区早新生代的旋转变形特征及其对印度-欧亚大陆碰撞远程响应的理解。柴北缘地区出露有近乎连续完整的早新生代路乐河组-下干柴沟组地层,为研究青藏高原东北部早新生代旋转变形提供了理想场所。本文对柴北缘逆冲带北中部的驼南和高泉两剖面早新生代路乐河组和下干柴沟组地层开展精细古地磁旋转变形研究:包括在驼南剖面布设4个时间节点、24个采点260个古地磁岩心样品,高泉剖面布设2个时间节点、14个采点150个古地磁岩心样品。通过系统岩石磁学和热退磁实验分析,揭示两剖面早新生代样品的载磁矿物主要是赤铁矿,并含有少量磁铁矿;所获得31个有效采点的高温特征剩磁方向通过褶皱检验和倒转检验,指示可能是岩石沉积时期记录的原生剩磁方向。结合柴北缘中部红柳沟剖面已有古地磁数据,三剖面古地磁结果一致表明柴北缘地区在45~35 Ma期间发生了显著(约20°)逆时针旋转变形。结合东部陇中盆地同时期古地磁旋转变形记录,发现二者具有反向的共轭旋转变形关系。综合青藏高原东部早新生代(52~46 Ma)旋转变形和渐新世以来走滑断裂活动等证据,我们认为:(1)高原东北部的共轭旋转变形是该地区对印度-欧亚碰撞的远程响应,其时间不晚于中始新世(约45 Ma);(2)早新生代自喜马拉雅东构造结至高原东北部,其两侧系统的共轭旋转变形很可能是该时期喜马拉雅东构造结北北东向压入欧亚大陆引起的右旋和左旋剪切作用导致,且剪切应力及相关的地壳缩短和旋转变形等呈现自东构造结地区沿北北东向逐步向高原东北部传递的特征;(3)古新世—始新世时期高原构造变形可能主要通过南北向挤压-地壳增厚模式、渐新世以来主要以沿主要断裂带的侧向挤出模式来调整。

关键词：青藏高原东北部古地磁旋转变形早新生代柴北缘喜马拉雅东构造结

Transcriptomic and bioinformatics analysis of the mechanism by which erythropoietin promotes recovery from traumatic brain injury in mice

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第1期19卷 171-179页

作者： weilin Tan Jun Ma Jiayuanyuan Fu Biying Wu Ziyu Zhu Xuekang Huang Mengran Du Chenrui Wu Ehab Balawi Qiang Zhou Jie zhang Zhengbu Liao Department of Neurosurgery The First Affiliated Hospital of Chongqing Medical UniversityChongqingChina

Recent studies have found that erythropoietin promotes the recovery of neurological function after traumatic brain ***,the precise mechanism of action remains unclea *** this study,we induced moderate traumatic brain injury in mice by intrape ritoneal injection of erythro poietin for 3 consecutive *** sequencing detected a total of 4065 differentially expressed RNAs,including 1059 mRNAs,92 microRNAs,799 long non-coding RNAs,and 2115circular *** Encyclopedia of Genes and Genomes and Gene Ontology analyses revealed that the coding and non-coding RNAs that were differentially expressed after traumatic brain injury and treatment with erythropoietin play roles in the axon guidance pathway,Wnt pathway,and MAPK *** competing endogenous RNA networks showed that regulatory relationship between the differentially expressed non-coding RNAs and *** the axon guidance pathway was repeatedly enriched,the expression of Wnt5a and Ephb6,key factors in the axonal guidance pathway,was ***6 expression decreased and Wnt5a expression increased after traumatic brain injury,and these effects were reversed by treatment with erythro *** findings suggest that erythro poietin can promote recove ry of nerve function after traumatic brain injury through the axon guidance pathway.

关键词： axon guidance bioinformatics analysis competing endogenous RNA erythropoietin Gene Ontology Kyoto Encyclopedia of Genes and Genomes non-coding RNA RNA sequencing transcriptomics traumatic brain injury

Paleogeography control of Indian monsoon intensification and expansion at 41 Ma

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2021年第22期66卷 2320-2328,M0004页

作者： Xiaomin Fang Maodu Yan weilin zhang Junsheng Nie Wenxia Han Fuli Wu Chunhui Song Tao zhang Jinbo Zan Yongpeng Yang State Key Laboratory of Tibetan Plateau Earth System Resources and EnvironmentInstitute of Tibetan Plateau Research(TPESRE)Chinese Academy of SciencesBeijing 100101China Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Western China’s Environments of Ministry of Education Lanzhou UniversityLanzhou 730000China Shandong Provincial Key Laboratory of Water and Soil Conservation&Environmental Protection School of Resource and Environmental SciencesLinyi UniversityLinyi 276000China School of Earth Sciences&Key Laboratory of Western China’s Mineral Resources of Gansu Province Lanzhou UniversityLanzhou 730000China

As a crucial part of the Asian monsoon stretching from tropical India to temperate East Asia, the Indian monsoon(IM) contributes predominant precipitation over Asian continent. However, our understanding of IM’s onset, development and the underlying driving mechanisms is limited. Increasing evidence indicates that the IM began in the Eocene or even the Paleocene and was unexceptionally linked to the early rise of the Tibetan Plateau(TP). These were challenged by the heterogeneous and diachronous uplift of the TP and all the reported records were confined to tropical zone under tropical monsoon driven by the Intertropical Convergence Zone(ITCZ) that is irrelevant to the TP. Therefore, reliable paleoclimatic records from the extra-tropical IM region is crucial to reveal how the tropical IM expanded to subtropical and temperate zones and what driving factors might be related to it. Here we present robust Eocene paleoenvironmental records from central Yunnan(~26°N) in subtropical East Asia. The multiproxy results of two sites demonstrate a consistent sudden switch from a dry environment in the early Eocene to a seasonally wet one at 41 Ma, suggesting a jump of the tropical IM to the southern subtropical zone at 41 *** full collision of India with Asia, and the resulting changes in paleogeography at 41 Ma(closure of the Neotethys sea, retreat of the Paratethys seas, fast northward movement of the southern margin of the TP and rise of the central TP), aided by synchronous Antarctic cooling, might have worked together to drive the IM enhancement and northward expansion.

关键词： Asia paleogeography Indian tropical monsoon Eocene paleoenvironment Subtropical monsoon onset Driven factors and forcings

在线全文

学校读者我要写书评

暂无评论

样条函数线法分析壳体非线性问题

中国矿业大学学报 1999年第2期28卷 152-154页

作者：张伟林牛忠荣安徽建筑工业学院计算中心合肥工业大学应用数学力学系

采用样条函数线法分析了圆柱壳及具有封闭截面壳体的几何非线性问题．用样条函数插值将二维非线性偏微分问题化为一组用径向结线位移增量表示的非线性常微分方程，然后用常微分方程求解器迭代求解；还导出了用于非线性分析的样条函数线... 详细信息

采用样条函数线法分析了圆柱壳及具有封闭截面壳体的几何非线性问题．用样条函数插值将二维非线性偏微分问题化为一组用径向结线位移增量表示的非线性常微分方程，然后用常微分方程求解器迭代求解；还导出了用于非线性分析的样条函数线法增量方程；最后给出了算例．

关键词：样条函数线法几何非线性增量方程壳体

蛋白质O-GlcNAc修饰与肿瘤糖代谢关系的研究进展

在线全文

学校读者我要写书评

暂无评论

中国药科大学学报 2019年第2期50卷 127-134页

作者：张炜琳王鑫怡严方中国药科大学药物分析教研室南京210009

蛋白质O-GlcNAc糖基化是指单个N-乙酰葡萄糖胺(N-acetylglucosamine,GlcNAc)分子连接在蛋白质丝氨酸或苏氨酸的羟基氧原子上的一种翻译后修饰。O-GlcNAc糖基化广泛存在于转录因子、代谢通路上的激酶以及细胞质的部分酶中,影响细胞的转... 详细信息

蛋白质O-GlcNAc糖基化是指单个N-乙酰葡萄糖胺(N-acetylglucosamine,GlcNAc)分子连接在蛋白质丝氨酸或苏氨酸的羟基氧原子上的一种翻译后修饰。O-GlcNAc糖基化广泛存在于转录因子、代谢通路上的激酶以及细胞质的部分酶中,影响细胞的转录、信号的传导和细胞的代谢等生命进程。肿瘤的异常糖代谢是近年来肿瘤发病机制和治疗靶点研究领域的热点。O-GlcNAc糖基化通过影响代谢通路上激酶的活性进而调控肿瘤细胞的糖代谢,与肿瘤的糖代谢密切相关,被认为是肿瘤产生发展的潜在原因之一。本文就O-GlcNAc修饰在肿瘤葡萄糖摄取、糖酵解、戊糖磷酸途径及三羧酸循环等研究中的进展进行综述,为研发靶向O-GlcNAc修饰的抗肿瘤靶点及药物提供理论参考。

关键词： O-GlcNAc修饰抗肿瘤糖代谢葡萄糖摄取糖酵解戊糖磷酸途径三羧酸循环谷氨酰胺代谢