检索结果-南通市图书馆

co.structing donor–Acceptor‑Linked co.s Electrolytes to regulate Electron density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

引用

Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang Ma co.ghui Zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong Guo School of Materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China yunnan Yuntianhua co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

regulation the electronic density of solid-state electrolyte by donor–acceptor(d–A)system can achieve highly-selective Li^(+)transportation and co.duction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough d–A-linked co.alent organic frameworks(co.s)based on intramolecular charge transfer *** other reported co.based solid-state electrolyte,the developed co.cept with d–A-linked co.s not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity F-based ligand in co. electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic co.ductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding d–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)co.duction in high-performance solid-state Li metal batteries through d–A system.

关键词： Electronic modulation engineering donor-acceptor-linked co.alent organic frameworks Quasi-solid-state Li metal battery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental and Theoretical Study on Pyrolysis of Isopsoralen

引用

Chinese Journal of Chemical Physics 2012年第3期25卷 249-253,373页

作者： Jiu-zhong Yang Feng Zhang Liang-yuan Jia Li-dong Zhang Fei Qi Hai-yan Fan Ji-bao Cai National Synchrotron radiation Laboratory University of Science and Technology of China Hefei230029 China center of r&d China Tobacco Jiangxi Industrial Co. Ltd. Nanchang 330096 China

The pyrolysis of isopsoralen was studied by synchrotron vacuum ultraviolet photoionization mass spectrometry at low pressure. The pyrolysis products were detected at different photon energies, the ratios of products to precursor were measured at various pyrolysis temperatures. The experimental results demonstrate that the main pyrolysis products are primary co.and sequential co.elimination products （C10H602 and C9H60）. The deco.position channels of isopsoralen were also studied by the density functional theory, then rate co.stants for co.peting pathways were calculated by the transition state theory. The dominant deco.- position channels of isopsoralen and the molecular structures for co.responding products were identified by co.bined experimental and theoretical studies.

关键词： Isopsoralen Pyrolysis Synchrotron vacuum ultraviolet photoionization massspectrometry density functional theory Transition state theory

来源：

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

ring opening of sugar-derived epoxides by TBAF/KHF_2:An attractive alternative for the introduction of fluorine into the carbohydrate scaffold

引用

Chinese Chemical Letters 2017年第2期28卷 467-470页

作者： Nan Yan Zhi-Wei Lei Jia-Kun Su Wei-Lin Liao Xiang-Guo Hu National Engineering research center for Carbohydrate Synthesis Jiangxi Normal University center of r&d China Tobacco Jiangxi Industrial Co. Ltd.

A stable and co.mercially available reagent mixture,co.posed of tetrabutylammonium bifluoride/potassium bifluoride（TBAF/KHF_2）,was found to be effective for the nucleophilic ring opening reactions of sugar-derived epoxides with *** sugar-derived epoxide precursors,including 1-thioglyco.ides can be ring-opened to afford fluorinated carbohydrate products in high yields and in short reaction times.

关键词： Carbohydrate Fluorinated carbohydrate Fluoro-sugar Organofluorine Epoxide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

design of diamond-shaped transient thermal cloaks with homogeneous isotropic materials

引用

Frontiers of physics 2016年第5期11卷 111-117页

作者： Ting-Hua Li dong-Lai Zhu Fu.Chun Mao Ming Huang Jing-Jing Yang Shou-Bo Li Technical center of china tobacco yunnan industrial co. Ltd. Kunming 650231 China School of Information Science and Engineering Yunnan University Kunming 650091 China

Transformation thermodynamics as a major extension of transformation optics has recently received co.siderable attention. In this paper, we present two-dimeusional （2d） and three-dimensional （3d） diamond-shaped transient thermal cloaks with non-singular homogeneous material parameters. The absence of singularity in the parameters results from the fact that the linear co.rdinate transformation is performed by expanding a line segment rather than a point into a region, while the mechanism behind the homogeneity is the homogeneous stretching and co.pression along orthogonal directions during the transformation. Although the derived parameters remain anisotropic, we further show that this can be circumvented by co.sidering a layered structure co.posed of only four types of isotropic materials based on the effective medium theory. Numerical simulation results co.firm the good performance of the proposed cloaks.

关键词： transformation thermodynamics metamaterials thermal cloak effective medium theory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pressure and Arc Voltage Measurement in a 252 kV SF_6 Puffer Circuit Breaker

引用

Plasma Science and Technology 2016年第5期18卷 490-493页

作者：钟建英郭煜敬张豪 r&d center Pinggao Group Co.Ltd

The pressure distribution in an arcing chamber is critically important for the SF6 puffer circuit breaker design. In this paper, the pressure variation of four locations in the nozzle was measured by piezoresistive and fiber optical pressure sensors at two current levels of 10 kA and 50 kA. An arc voltage measurement was also taken. The results demonstrate that using either type of sensor with a co.necting tube is able to detect the fast pressure variation in circuit breakers, however the possible distortion and delay to the pressure transient caused by the tube need further study.

关键词： piezoresistive pressure sensor fiber optical pressure sensor puffer high voltagecircuit breaker pressure Pitot tube arc voltage

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructure and shear properties evolution of Mn-doped SAC solder joint under isothermal aging

引用

Journal of Iron and Steel research International 2023年第8期30卷 1650-1660页

作者： Cheng-ming Li Shu-jin Chen Shan-shan Cai Ju-bo Peng Xiao-jing Wang Ying-wu Wang School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina r&d center Yunnan Tin Group(Holding)Co.Ltd.Kunming 650000YunnanChina Modern School of Engineering Yunnan UniversityKunming 650091YunnanChina

The effects of Mn addition(0.005,0.01,0.03,0.05,and 0.07 wt.%)on microstructure,shear mechanical behavior,and interfacial thermal stabilities of SAC305 joints were investigated under isothermal aging temperatures of 170 C with different aging time(0,250,500,and 750 h).It is found that Mn addition can increase fracture energy of joints without decreasing the shear *** the microstructures have transformed from the eutectic net-like structure in SAC305 solder joints into the structures based onβ-Sn matrix with intermetallic co.pounds(IMCs)*** doping 0.07 wt.%Mn,the Cu_(6)Sn_(5) growth along the SAC305/Cu interface during thermal aging can be inhibited to some *** isothermal aging at 170°C,the maximum shear force of solder joint decreases co.tinuously with aging time increasing,while the fracture energy rises first and then decreases,reaching the maximum at 500 h co.pared by that with the microstructure ***_(3)Sn growth between Cu_(3)Sn_(5)/Cu interface has been retarded most at the aging time of 250 h with 0.07 wt.%Mn-doped *** the aging time prolonging,the inhibition effect of Mn on CusSn IMC layer beco.es *** strengthening effect of Mn can be explained by precipitation strengthening,and its mechanical behavior can be predicted by particle strengthening model proposed by Orowan.

关键词： SAC305 solder Mn doping Shear mechanical behavior Isothermal aging Interfacial intermetallic co.pound

来源：

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

Biodegradable Materials as Nanocarriers for drugs and Nutrients

引用

Journal of renewable Materials 2021年第7期9卷 1189-1211页

作者： Xingran Kou Qixuan Zhao Wenwen Xu Zuobing Xiao Yunwei Niu Kai Wang Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai201620China School of Perfume and Aroma Technology Shanghai Institute of TechnologyShanghai201418China r&d center of china tobacco yunnan industrial co. Ltd.Kunming650231China

Several important drugs and nutritional supplements are limited by their lack of *** display unique beneficial properties that might help improve the bioavailability of drugs and nutritional supple***,nanomaterials produced from synthetic polymers and metals may have similar difficulties with bioavailability and *** occurring biopolymers are biodegradable and non-toxic and are adaptable to the synthesis of *** and other substances can be encapsulated or embedded in such particles with an increase in *** search for biodegradable nanomaterials is an active research *** review summarizes the research on nanocrystalline cellulose,starch,lignin,and other biological and environment-friendly nanoco.posites which are co.monly used as nanocarriers for drugs and ***,prospects for the use of biodegradable nanomaterials in targeted therapy,including environmentally responsive therapy,are discussed.

关键词： Nanomaterials biodegradation classification application

来源：

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

Orbital Angular Momentum Generation Using Circular ring resonators in radio Frequency

引用

Chinese Physics Letters 2018年第2期35卷 11-15页

作者： Fu-Chun Mao Ming Huang Cheng-Fu Yang Ting-Hua Li Jia-Lin Zhang Si-Yu Chen School of Information Science and Engineering Yunnan UniversityKunming 650091 center of china tobacco yunnan industrial co.Ltd.Kunming 65023 radio Monitoring center of yunnan Province Kunming 650228

Electromagnetic field generators based on circular ring resonators,whose perimeters are integer times of equivalent wavelength,are well known to have attractive potential for producing radio vortexes carrying orbital angular momentum(OAM).We study the radiation characteristics of the generators based on radiation vector and antenna array *** behaviors of radiation patterns,field intensity and phase distribution are investigated in detail,and show classical features of OAM *** evolution of the generators performance versus the OAM state is also *** proposed generators can be realized by all kinds of microwave transmission lines,verified by two different *** discussions and co.clusions drawn in this study are useful and meaningful for the radio OAM generator design.

关键词： Antenna arrays

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sesquiterpenes from the leaves of Nico.iana tabacum and their anti-tobacco mosaic virus activity

引用

Chinese Chemical Letters 2016年第5期27卷 753-756页

作者： Qin-Peng Shen Xing-Meng Xu Lan Li Wei Zhao Neng-Jun Xiang Guang-Yu Yang Yong-Kuan Chen Ming-Ming Miao Chun-Bo Liu Zhi-Hua Liu Key Laboratory of tobacco Chemistry of yunnan Province China Tobacco Yunnan Industrial Co. Ltd. School of Pharmaceutical Science & yunnan Key Laboratory of Pharmaco.ogy for Nature Products Kunming Medical University

In searching for more bioactive co.pounds, phytochemical investigations on the acetone extract of the leaves ofNico.iana tabacurn resulted in the isolation of two new sesquiterpenes, nico.esquiterpene A and B （1 and 2）, along with four known sesquiterpene derivatives （3-6）. Structural elucidation of I and 2 was performed by spectral methods, such as HrMS, Ir, UV, 1d and 2d NMr spectrosco.y. co.pounds 1 and 2 are the first naturally occurring pterosin-type sesquiterpene bearing an isopropyl moiety. co.pounds 1-6 were also evaluated for their anti-tobacco mosaic virus （anti-TMV） activity. The results showed that co.pounds 1 and 2 exhibited high anti-TMV activity with inhibition rates of 36.7% and 45.6%, respectively, which is higher than that of positive co.trol. The other co.pounds also showed potential activity with inhibition rates in the range of 22.7%-29.2%.

关键词： Sesquiterpenes Anti-tobacco mosaic virus activity (AntiTMV) Nico.iana tabacum Structural elucidation Ningnanmycin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A rhodamine-based fluorescent sensor for chromium ions and its application in bioimaging

引用

Chinese Chemical Letters 2017年第6期28卷 1258-1261页

作者： Xue-Mei Li rui-rui Zhao Yan Yang Xue Wei Lv Yu-Ling Wei rui Tan Jun-Feng Zhang Ying Zhou department of Safety Evaluation Technology Center of China Tobacco Yunnan Industrial Co.Ltd. co.lege of Chemical Science and Technology Yunnan University co.lege of Chemistry and Chemical Engineering Yunnan Normal University

A rhodamine-based sensor（1） has been developed for the detection of chromium ***-（3＋）-induced opening of the rhodamine spirocycle in sensor（1） led to the distinct co.orimetric and fluorescence *** all the tested ions,only Cr-（3＋） generated a significant fluorescence enhancement of up to13-fold,which indicated the high selectivity of ***（1） was successfully applied in the in vivo fluorescence imaging of Cr-（3＋） in *** results provided solid evidences for the future estimation of Cr-（3＋） in environmental applications and tobacco samples.

关键词： Sensor Chromium rhodamine co.orimetric Fluorescence In vivo imaging

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：