检索结果-南通市图书馆

Structure and properties of indium-doped ZnO films prepared by RF magnetron sputtering under different pressures

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第9期41卷 3239-3243页

作者： Li-Ping peng A-Ling He Liang fang Xiao-fei Yang Research Center of Laser Fusion Chinese Academy of Engineering PhysicsMianyang621900China Department of Applied Physics Chongqing UniversityChongqing400030China Science and Technology Information Center Chinese Academy of Engineering PhysicsMianyang621900China

High conductive and transparent In-doped ZnO thin films were deposited on glass substrates by radio-frequency(RF)magnetron sputtering at 250℃.Argon gas was used as the sputtering gas,and its pressure varies from 0.1 to 4.0 *** influences of deposition pressure on the structural,electrical and optical properties of the films were investigated by means of X-ray diffraction(XRD),scanning electron microscope(SEM)and Hall and transmittance *** optical constant of the films was estimated from transmittance data using a nonlinear programming *** is found that the deposition pressure affects the properties of the films *** film deposited at 2.0 Pa shows the optimal crystal quality with a high transmittance of 85%in the visible range and a low resistivity of 2.4×10^(−3)Ω·cm and can thus be used as a transparent electrode.

关键词： ZnO thin films Transparent conductive oxide Optical constant Magnetron sputtering

在线全文

学校读者我要写书评

暂无评论

菜鸟网络运营模式及其影响因素分析

物流工程与管理 2018年第10期40卷 24-25页

作者：彭芳菲贾雨桐郭思佳杲宇南京工程学院经济与管理学院江苏南京210000

快递配送从之前需要花费四、五天甚至一周的时间到现在的当日或次日达,取包裹从之前等快递员电话到现在深入各个学校、社区的菜鸟驿站,无不让人感叹当下物流行业的发展迅速。为了研究菜鸟网络运营模式及其影响因素,采取实地考察、任务... 详细信息

快递配送从之前需要花费四、五天甚至一周的时间到现在的当日或次日达,取包裹从之前等快递员电话到现在深入各个学校、社区的菜鸟驿站,无不让人感叹当下物流行业的发展迅速。为了研究菜鸟网络运营模式及其影响因素,采取实地考察、任务访谈、调查问卷等多种方式,深入剖析了菜鸟网络的运营模式,从三个方面总结了菜鸟网络运营模式的影响因素。

关键词：菜鸟网络运营模式影响因素

在线全文

学校读者我要写书评

暂无评论

东濮凹陷濮卫洼陷油气聚集条件

西北地质 2011年第4期44卷 113-121页

作者：方鹏飞寇韩生秦文龙张文选吕勇帅李向洋张晨陕西省神木县矿业地质测量管理站陕西神木719300 中国石油长庆石油勘探局培训中心甘肃庆阳745217 西北大学地质系西北大学大陆动力学国家重点实验室陕西西安710069

为加快东濮凹陷濮卫洼陷滚动勘探开发,分析本区沙三中亚段油气聚集条件特征,结合沉积相与砂体展布预测了洼陷有利油气聚集区。东濮凹陷濮卫洼陷发育巨厚的砂体展布,具有断陷湖盆分布体系多物源、多期次演化密切相关的特点,为油气聚集条... 详细信息

为加快东濮凹陷濮卫洼陷滚动勘探开发,分析本区沙三中亚段油气聚集条件特征,结合沉积相与砂体展布预测了洼陷有利油气聚集区。东濮凹陷濮卫洼陷发育巨厚的砂体展布,具有断陷湖盆分布体系多物源、多期次演化密切相关的特点,为油气聚集条件打下了良好的物质基础。通过对构造的研究,钻井岩心和测井的综合分析,认为濮卫洼陷具有多种有利的油气聚集条件。即广布的成熟烃源岩是油气生成的物质基础,不同类型砂体展布提供了重要储集空间,多套盐岩的沉积形成了良好的盖层分布,多种成因类型的圈闭是油气藏聚集的主要场所。通过对沙三中亚段8、4、3砂层组的初步分析,评价结果认为4砂层组情况最好,洼陷西翼中部和西北部为最有利区块。

关键词：油气聚集濮卫洼陷东濮凹陷

A cellulose-based lithium-ion battery separator with regulated ionic transport and high thermal stability for extreme environments

在线全文

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 315-322页

作者： Kun-peng Yang Song Xie Zi-Meng Han Hao-Cheng Liu Chong-Han Yin Wen-Bin Sun Zhang-Chi Ling Huai-Bin Yang De-Han Li Qing-fang Guan Shu-Hong Yu Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

Separators play a critical role in lithium-ion ***,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh ***,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and *** an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion *** addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.

关键词： lithium-ion batteries bio-inspired materials battery separators cellulose nanofiber ultrahigh ionic conductivity high safety

A Parametric Survey of the CME Triggering Process by Numerical Simulations

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

Chinese Journal of Astronomy and Astrophysics 2005年第6期5卷 636-644页

作者： Xiao-Yan Xu peng-fei Chen Cheng fang Department of Astronomy Nanjing University Nanjing 210093

Observations indicate that solar coronal mass ejections （CMEs） are closely associated with reconnection-favored flux emergence, which was explained in the emerging flux trigger mechanism for CMEs by Chen ＆ Shibata based on numerical simulations. We present a parametric survey of the triggering agent： its polarity orientation, position, and the amount of the unsigned flux. The results suggest that whether a CME can be triggered depends on both the amount and location of the emerging flux, in addition to its polarity orientation. A diagram is presented to show the eruption and non-eruption regimes in the parameter space. The work is aimed at providing useful information for the space weather forecast.

关键词： Sun coronal mass ejections (CMEs)-Sun filaments

在线全文

学校读者我要写书评

暂无评论

西安市城市地上地下土地权利调查研究

国土资源科技管理 2011年第3期28卷 46-51页

作者：袁旭东武泽江高蓝杜艳琴房鹏飞陕西华地房地产估价咨询有限公司西安710065

目前,我国正处于城市地上地下空间建设的快速发展阶段,然而由于立法滞后,地上地下空间开发利用中土地权属管理面临越来越多的新问题。根据原有的土地管理法律法规、政策文件来管理城市地上地下土地权利,已不能满足现阶段经济社会发展对... 详细信息

目前,我国正处于城市地上地下空间建设的快速发展阶段,然而由于立法滞后,地上地下空间开发利用中土地权属管理面临越来越多的新问题。根据原有的土地管理法律法规、政策文件来管理城市地上地下土地权利,已不能满足现阶段经济社会发展对城市土地利用和管理提出的新要求。通过对西安市城市地上地下土地权属的调查和对城市地上地下土地权属管理相关问题的思考,全面分析了西安市城市地上地下土地权属管理现状特点及土地权属管理中普遍存在的问题,最后提出了一些对策建议,供有关部门决策参考。

关键词：地上地下空间建设用地建设用地使用权西安市

Design and Analysis of a Novel 2T2R Parallel Mechanism with the Closed-loop Limbs

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2021年第4期18卷 654-666页

作者： Hai-Rong fang peng-fei Liu Hui Yang Bing-Shan Jiang School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China

This paper presents a novel four degrees of freedom(DOF) parallel mechanism with the closed-loop limbs, which includes two translational(2 T) DOF and two rotational(2 R) DOF. By connecting the proposed parallel mechanism with the guide rail in series,the 5-DOF hybrid robot system is obtained, which can be applied for the composite material tape laying in aerospace industry. The analysis in this paper mainly focuses on the parallel module of the hybrid robot system. First, the freedom of the proposed parallel mechanism is calculated based on the screw theory. Then, according to the closed-loop vector equation, the inverse kinematics and Jacobian matrix of the parallel mechanism are carried out. Next, the workspace stiffness and dexterity analysis of the parallel mechanism are investigated based on the constraint equations, static stiffness matrix and Jacobian condition number. Finally, the correctness of the inverse kinematics and the high stiffness of the parallel mechanism are verified by the kinematics and stiffness simulation analysis, which lays a foundation for the automatic composite material tape laying.

关键词： 2T2R parallel mechanism close loop structure high stiffness kinematics analysis workspace

Experimental and first-principles calculation of TiN growth mechanism on CeAlO_(3) surface in steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第2期31卷 452-463页

作者： fei-hu He Jun peng fang Zhang Yong-bin Wang Hong-tao Chang School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina

Regular TiN is harmful to the toughness of steel,and its shape and size need to be *** the behavior of TiN precipitation on CeAlO_(3) surfaces is critical for controlling the morphology and formation process of CeAlO_(3)–TiN composite inclusions in the *** results showed that TiN had a square morphology on the CeAlO3 surface,and electron backscatter diffraction phase identification results revealed the orientation relationship between CeAlO_(3) and TiN as follows:(001)_(CeAlO_(3))//(110)_(TiN),(100)_(CeAlO_(3))/(001)_(TiN),and[010]_(CeAlO_(3))/[110]_(TiN).The CeAlO3 crystal structure was studied using the first-principles calculation method,and the adsorption and growth process of TiN on the CeAlO_(3) surface were investigated from the atomic *** calculation results indicate that there is no metallic bonding present in the CeAlO_(3) *** the low-index crystal planes of CeAlO_(3),the(110)planes terminated with O and CeAlO have the highest and lowest surface energies,respectively,with values of 0.373 and 0.051 eV/Å^(2).On the high surface energy plane of CeAlO_(3),the TiN atomic permutation structure is consistent with the arrangement of Ti and N atoms in TiN(100)or(110).For the low surface energy plane of CeAlO_(3),the Ti and N atoms are arranged in a ring-like structure.

关键词： CeAlO_(3)-TiN inclusion Orientation relationship Crystal structure First principle Surface energy

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

丙泊酚致过敏性休克死亡1例

医药导报 2025年第1期44卷 131-133页

作者：李晓东彭芳杨丹安宁市第一人民医院药学部昆明650300 昆明市药品不良反应与药物滥用监测中心昆明650000

患者,女,48岁,因子宫内节育器取出手术麻醉给予丙泊酚乳状注射液100 mg,静脉注射,发生过敏性休克死亡。采用诺氏评分法判断怀疑药品致过敏性休克死亡相关性,结合相关文献分析丙泊酚导致过敏的作用机制,警戒临床关注丙泊酚的安全性,并为... 详细信息

患者,女,48岁,因子宫内节育器取出手术麻醉给予丙泊酚乳状注射液100 mg,静脉注射,发生过敏性休克死亡。采用诺氏评分法判断怀疑药品致过敏性休克死亡相关性,结合相关文献分析丙泊酚导致过敏的作用机制,警戒临床关注丙泊酚的安全性,并为避免使用丙泊酚出现过敏性休克提出了可行建议。

关键词：丙泊酚过敏性休克死亡药品不良反应