检索结果-南通市图书馆

Side-Chain-Type Polyimide-Cu Complexes with Suppressed Activation Energy of Relaxation for Advanced High-Temperature Capacitor

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第8期42卷 1038-1048页

作者： Bai-Yang Zhou Ze-Tong Ma Shi-Long Zhong zhen-Jie Huang Qi Guo Deng-Chong feng Zhong-Ke Yuan Shao-Lin Lu Yu-Zhao Yang Cheng Wang Ding-Shan Yu Xu-Dong Chen Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Guangdong Engineering Technology Research Centre for High Performance Organic and Polymer Photoelectric Functional FilmsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Laboratory of Chemistry and Fine Chemical Industry Jieyang Centre Jieyang 515200China Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031China

The burgeoning growth of the new energy vehicles and aviation industry has escalated the need for energy storage capacitors capable of stable operation in harsh *** advent of metal-polyimide complexes has illuminated a novel approach for preparing tem perature-resistant ***,the general application of these metal-polyimide com plexes is impeded by the high dielectric loss and low breakdown strength,consequences of main-chain coordination and excessive metal ions ***,our study proposes a novel polyimideCu complex material(POP-Cu)predicated on side-chain-type pyridine-Cu coordination,utilizing the structural backbone PMDA-ODA of mature commercial PI(Kapton)with reliable *** to the high degree of freedom afforded by the side chain with suppressed relaxation activation energy and the long-range electron delocalization formed by d-πcoordination,the dielectric constant of this material containing merely 2.7 mol%Cu increases from 3.25(POPI)to 5.58,while maintaining a remarkably low dielectric loss of ***,this material exhibits a substantial DC breakdown strength of 436.2 MV·m^(-1)and a high energy density of 5.42 J·cm^(-3),coupled with superior mechanical and thermal *** at 150℃,it retains over 90%of its room-temperature energy density,demon strating notable dielectric stability under high *** attributes underscore its promising application for capacitors operating in harsh environments.

关键词： Dielectric performance Polyimide complexes Side-Chain-Type High-temperature capacitor

Cross section measurement for the^(232)Th(n,f)reaction in the 4.50−5.40 MeV region using a time projection chamber

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第10期48卷 157-167页

作者： Haofan Bai Han Yi Yankun Sun Yiwei Hu Jie Liu Zepeng Wu Cong Xia Wenkai Ren Wentian Cao Tieshuan fan Guohui Zhang Ruirui fan Yang Li Wei Jiang Yonghao Chen You Lv Changjun Ning Weihua Jia Zhiyong Zhang Haolei Chen zhen Chen Maoyuan Zhao Changqing feng Shubin Liu State Key Laboratory of Nuclear Physics and Technology Institute of Heavy Ion PhysicsPeking UniversityBeijing 100871China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China National Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi'an 710024China Department of Nuclear Science and Technology School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China

Accurate cross sections of neutron induced fission reactions are required in the design of advanced nuclear systems and the development of fission *** projection chambers(TPCs),with their track reconstruction and particle identification capabilities,are considered the best detectors for high-precision fission cross section *** TPC developed by the back-streaming white neutron source(Back-n)team of the China Spallation Neutron Source(CSNS)was used as the fission fragment detector in *** this study,the cross sections of the ^(232)Th(n,f)reaction at five neutron energies in the 4.50−5.40 MeV region were *** fission fragments and α particles were well identified using our TPC,which led to a higher detection efficiency of the fission fragments and smaller uncertainty of the measured cross *** is the first measurement of the ^(232)Th(n,f)reaction using a TPC for the detection of fission *** uncertainties less than 5%,our cross sections are consistent with the data in different evaluation libraries,including JENDL-4.0,ROSFOND-2010,CENDL-3.2,ENDF/B-VⅢ.0,and BROND-3.1,whose uncertainties can be reduced after future improvement of the measurement.

关键词： ^(232)Th(n,f)fission cross section time projection chamber(TPC) ^(232)Th

IbNIEL-mediated degradation of IbNAC087 regulates jasmonic acid-dependent salt and drought tolerance in sweet potato

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

Journal of Integrative Plant Biology 2024年第2期66卷 176-195页

作者： Xu Li zhen Wang Sifan Sun Zhuoru Dai Jun Zhang Wenbin Wang Kui Peng Wenhao Geng Shuanghong Xia Qingchang Liu Hong Zhai Shaopei Gao Ning Zhao feng Tian Huan Zhang Shaozhen He Key Laboratory of Sweet Potato Biology and Biotechnology Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis&Utilization and Joint Laboratory for International Cooperation in Crop Molecular BreedingMinistry of EducationCollege of Agronomy&BiotechnologyChina Agricultural UniversityBeijing 100193China Sanya Institute of China Agricultural University Sanya 572025China State Key Laboratory of Plant Physiology and Biochemistry National Maize Improvement CenterKey Laboratory of Biology and Genetic Improvement of MaizeBeijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China

Sweet potato(Ipomoea batatas[L.]Lam.)is a crucial staple and bioenergy *** abiotic stress tolerance holds significant importance in fully utilizing marginal *** processes regulate abiotic stress responses,yet the molecular regulatory mechanisms in sweet potato remain *** this study,a NAC(NAM,ATAF1/2,and CUC2)transcription factor,IbNAC087,was identified,which is commonly upregulated in salt-and drought-tolerant *** of IbNAC087 increased salt and drought tolerance by increasing jasmonic acid(JA)accumulation and activating reactive oxygen species(ROS)scavenging,whereas silencing this gene resulted in opposite ***-rich IbNAC087-OE(overexpression)plants exhibited more stomatal closure than wild-type(WT)and IbNAC087-Ri plants under NaCl,polyethylene glycol,and methyl jasmonate ***087 functions as a nuclear transcriptional activator and directly activates the expression of the key JA biosynthesisrelated genes lipoxygenase(IbLOX)and allene oxide synthase(IbAOS).Moreover,IbNAC087 physically interacted with a RING-type E3 ubiquitin ligase NAC087-INTERACTING E3 LIGASE(IbNIEL),negatively regulating salt and drought tolerance in sweet *** ubiquitinated IbNAC087 to promote 26S proteasome degradation,which weakened its activation on IbLOX and *** findings provide insights into the mechanism underlying the IbNIEL-IbNAC087 module regulation of JA-dependent salt and drought response in sweet potato and provide candidate genes for improving abiotic stress tolerance in crops.

关键词： abiotic tolerance IbNAC087 IbNIEL JA sweet potato

Discovery of a potent and highly selective inhibitor of SIRT6 against pancreatic cancer metastasis in vivo

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2024年第3期14卷 1302-1316页

作者： Xinyuan Xu Qian Zhang Xufeng Wang Jing Jin Chengwei Wu Li feng Xiuyan Yang Mingzhu Zhao Yingyi Chen Shaoyong Lu zhen zheng Xiaobing Lan Yi Wang Yan zheng Xuefeng Lu Qiufen Zhang Jian Zhang State Key Laboratory of Medical Genomics National Research Center for Translational Medicine at ShanghaiRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Medicinal Chemistry and BioinformaticsCenter Shanghai Jiao Tong University School of MedicineShanghai 200025China Department of General Surgery Huashan HospitalCancer Metastasis InstituteFudan UniversityShanghai 200040China Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease School of Basic Medicine and Medical CenterUniversity of Science and Technology of ChinaHefei 230026China Department of Assisted Reproduction Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China College of Pharmacy Ningxia Medical UniversityYinchuan 750004China Department of Pancreatic Surgery Shanghai General HospitalShanghai Key Laboratory of Pancreatic DiseaseInstitute of Pancreatic DiseaseShanghai Jiao Tong University School of MedicineShanghai 200080China

Pancreatic cancer,one of the most aggressive malignancies,has no effective treatment due to the lack of targets and drugs related to tumour ***6 can promote the migration of pancreatic cancer and could be a potential target for antimetastasis of pancreatic ***,highly selective and potency SIRT6 inhibitor that can be used in vivo is yet to be ***,we developed a noveSIRT6 allosteric inhibitor,compound 11e,with maximal inhibitory potency and an IC_(50) value of 0.98±0.13μmol/***,compound 11e exhibited significant selectivity against other histone deacetylases(HADC1-11 and SIRT1-3)at concentrations up to 100μmol/*** allosteric site and the molecular mechanism of inhibition were extensively elucidated by cocrystal complex structure and dynamic structural ***,we confirmed the antimetastatic function of such inhibitors in four pancreatic cancer cell lines as well as in two mouse models of pancreatic cancer liver *** our knowledge,this is the first study to reveal the in vivo effects of SIRT6 inhibitors on liver metastatic pancreatic *** not only provides a promising lead compound for subsequent inhibitor developmentargeting SIRT6 but also provides a potential approach to address the challenge of metastasis in pancreatic cancer.

关键词： SIRT6 Inhibitor Allosteric Selectivity Cocrystal Pancreatic cancer metastasis

NB-IoT终端长续航安全供电解决方案研究

在线全文

学校读者我要写书评

暂无评论

移动通信 2016年第24期40卷 67-71,77页

作者：宋丹范振锋曹蕾中国移动通信研究院北京100053

从现有终端安全供电解决方案出发,分析了现有方案的优劣势,并针对现有方案的不足,提出了NB-Io T终端长续航安全供电的解决方案,详细介绍了该方案在终端侧的硬件实现原理,以及该方案在网络侧的系统实现原理。使用本文所述的方案,既能够保... 详细信息

从现有终端安全供电解决方案出发,分析了现有方案的优劣势,并针对现有方案的不足,提出了NB-Io T终端长续航安全供电的解决方案,详细介绍了该方案在终端侧的硬件实现原理,以及该方案在网络侧的系统实现原理。使用本文所述的方案,既能够保证NB-Io T终端长时工作的可靠性,同时又能够保证终端长时供电的安全性,为实现NB-Io T终端长续航安全工作提供了技术保障。

关键词： NB-IoT 电源管理终端设备长续航通信模组

Unconventional Organic Low-Dimensional Crystals:Diversity and Potential Applications

在线全文

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第7期6卷 1628-1653页

作者： Jin feng Mao Sun Ying-Xin Ma zhen-Yu Geng Chuan-Zeng Wang Shu-Ping Zhuo Shu-Hai Chen Hong-Tao Lin Xue-Dong Wang School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000 School of Resources and Environmental Engineering Shandong University of TechnologyZibo 255000 Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123

Organic low-dimensional crystals have garnered escalating interests in the realms of miniaturized optoelectronics and integrated *** continual expansion of molecular systems and improvement in experimental conditions have given rise to unconventional organic low-dimensional crystals,which showcase a variety of appealing structure-dependent properties in the realm of organic semiconductors,owing to their adaptable physicochemical characteristics and exceptional optoelectronics ***,the development of unconventional low-dimensional crystals is filled with abundant possibilities due to their diverse application ***,we present a comprehensive overview of advancements in research on representative cases of unconventional low-dimensional organic crystals,using a systematic and rational structural ***,we have also discussed the existing challenges and future directions,aspiring to deepen understanding and encourage further research exploration in this field.

关键词： organic semiconductor crystal growth precise synthesis noncovalent interaction integrat-ed photonics

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

地理学视角下城市空间智能化研究进展与思考

地理科学 2024年第7期44卷 1166-1177页

作者：杨开先甄峰南京大学建筑与城市规划学院江苏南京210093 江苏省智慧城市规划与数字治理工程研究中心江苏南京210093

智能化是对城市未来发展方向的一种描述,城市研究需要地理学从空间角度对城市智能化发展进行把控,从而为解决城市问题提供更加有效的应对措施。本文从研究历程、内容和方法3个方面梳理了城市空间智能化研究进展。针对当前研究的不足,基... 详细信息

智能化是对城市未来发展方向的一种描述,城市研究需要地理学从空间角度对城市智能化发展进行把控,从而为解决城市问题提供更加有效的应对措施。本文从研究历程、内容和方法3个方面梳理了城市空间智能化研究进展。针对当前研究的不足,基于地理学视角对城市空间智能化研究进行思考。首先,本文探讨了城市空间智能化的地理内涵,即城市中的要素利用智能技术对城市中的客观事物和状态进行学习、分析、判断,并采取有目的性的行为从而有效地适应环境的过程。其次,本文提出了由人、机器和空间要素构成的城市空间智能化系统模型,对“人‒机‒空间”作用机制进行了解读,总结出自发交互、自主调节和双向选择3种机制,可对城市空间的形态、功能、结构等研究有所帮助。最后,构建了城市空间智能化研究框架,以城市空间智能化特征、功能结构、人与空间互动关系以及空间智能化模拟预测为重点内容,对城市空间智能化全过程进行剖析,以期为城市智能化发展提供科学、精准的空间资源配置方案,丰富智能时代城市空间的研究。

关键词：空间智能化城市空间地理学视角智能技术

在线全文

学校读者我要写书评

暂无评论

微震技术在崩塌落石监测预警应用的研究进展

工程地质学报 2024年第2期32卷 545-564页

作者：冯亮张振江西理工大学赣州341000 矿冶环境污染防控江西省重点实验室赣州341000 中国科学院、水利部成都山地灾害与环境研究所成都610041

崩塌与落石作为岩质边坡破坏与诱发的典型地质灾害,往往具有突发性、隐蔽性和缺乏明显直接的前兆信息,很难做到准确和及时的应急响应,存在巨大的安全隐患。微震技术依靠远程无接触、低成本、广覆盖和24 h高频率无间断监测能力正逐渐被... 详细信息

崩塌与落石作为岩质边坡破坏与诱发的典型地质灾害,往往具有突发性、隐蔽性和缺乏明显直接的前兆信息,很难做到准确和及时的应急响应,存在巨大的安全隐患。微震技术依靠远程无接触、低成本、广覆盖和24 h高频率无间断监测能力正逐渐被用于崩塌落石的监测预警中。通过监测和分析崩塌落石发生过程的动态振动信号,及时反馈振动信号的发生位置、时间、能量、以及崩塌落石的体积、质量等物理参数,微震技术最终可以做到对崩塌落石发生前的预测预报、发生时的监测预警和发生后的定位抢险。崩塌落石微震监测预警方法应用的难点主要体现在4个方面:(1)崩塌落石信号的识别和分类,通过对微震监测信号的降噪和特征提取,识别崩塌落石信号,并确定灾害发生和结束时刻;(2)崩塌落石的空间定位,确定崩塌落石发生的空间位置;(3)崩塌落石物理参数的反演,通过监测信号反演计算崩塌落石的速度、体积等物理参数;(4)崩塌落石的预警方法,提出崩塌落石预警模型,预测崩塌落石发生时间及地点。本文将从以上4个方面,结合本文作者最新研究成果,讨论微震技术在崩塌落石监测预警应用的最近研究进展,以及目前存在的缺陷。本文可为微震技术在地灾监测预警应用研究提供参考。

关键词：崩塌落石微震监测监测预警微震识别高陡边坡

The relationship between the high-frequency performance of supercapacitors and the type of doped nitrogen in the carbon electrode

在线全文

学校读者我要写书评

暂无评论

新型炭材料（中英文） 2024年第5期39卷 1015-1026页

作者： fan Ya-feng YI Zong-lin ZHOU Yi XIE Li-jing SUN Guo-hua WANG zhen-bing Huang Xian-hong SU fang-yuan CHEN Cheng-meng CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China University of Chinese Academy of Sciences Beijing 100049China College of Biomedical Engineering Taiyuan University of TechnologyTaiyuan 030024China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Nitrogen doping has been widely used to improve the performance of carbon electrodes in supercapacitors,particularly in terms of their high-frequency ***,the charge storage and electrolyte ion response mechanisms of different nitrogen dopants at high frequencies are still *** this study,melamine foam carbons with different configurations of surfacedoped N were formed by gradient carbonization,and the effects of the configurations on the high-frequency response behavior of the supercapacitors were *** a combination of experiments and first-principle calculations,we found that pyrrolic N,characterized by a higher adsorption energy,increases the charge storage capacity of the electrode at high *** the other hand,graphitic N,with a lower adsorption energy,increases the speed of ion *** propose the use of adsorption energy as a practical descriptor for electrode/electrolyte design in high-frequency applications,offering a more universal approach for improving the performance of N-doped carbon materials in supercapacitors.

关键词： High-frequency supercapacitors Carbon electrodes Doped nitrogen species Adsorption energy Descriptor