检索结果-南通市图书馆

化工技术与开发 2011年第11期40卷 15-17页

作者：边珊珊冯翔傅慧云马静雯吴东方东南大学化学化工学院江苏南京211189

以堇青石蜂窝陶瓷整体载体为基体,以γ-Al2O3为涂层材料,以Cu-Mn复合氧化物为活性组分,制备了一系列的催化剂,并考察了其对邻二甲苯的完全催化氧化性能。

关键词： Cu-Mn复合氧化物邻二甲苯催化燃烧整体催化剂

在线全文

学校读者我要写书评

暂无评论

电容器绝缘检测技术的现状与发展

绝缘材料 2008年第1期41卷 67-70,73页

作者：彭倩吴广宁周力任边姗姗任志超西南交通大学电气工程学院成都610031

介绍了电力电容器的常见故障,概述了现有绝缘检测技术的最新成果;讨论了高压储能电容器局部放电检测技术的核心问题。重点介绍了局部放电检测技术的发展,并对未来电容器绝缘检测技术作出展望。

关键词：电力电容器储能电容器绝缘检测局部放电

在线全文

学校读者我要写书评

暂无评论

星载射频ADC的电路设计及性能分析

空间电子技术 2016年第5期13卷 21-25,38页

作者：邢炜刘文山边郎张立新中国空间技术研究院西安分院西安710000

由于影响射频电路性能的因素较多,首先从理论上分析了影响模数转换精度的各种因素,然后对射频转换芯片ADC08D1000进行了介绍,并结合射频理论分析,对应用电路及其走线进行了设计和仿真优化。最终测试结果表明,采用电路设计、PCB设计与射... 详细信息

由于影响射频电路性能的因素较多,首先从理论上分析了影响模数转换精度的各种因素,然后对射频转换芯片ADC08D1000进行了介绍,并结合射频理论分析,对应用电路及其走线进行了设计和仿真优化。最终测试结果表明,采用电路设计、PCB设计与射频仿真相结合的方法,能极大避免射频信号在传输过程中的幅频特性难以控制的问题,极大优化射频模数电路的各项电性能。

关键词： AD 射频采样 ADS

在线全文

学校读者我要写书评

暂无评论

遥感技术在地质找矿中的应用

地质学刊 2015年第2期39卷 263-276页

作者：余先川熊利平张立保胡丹卞珊珊张远飞北京师范大学信息科学与技术学院北京100875 有色金属矿产地质调查中心北京100012

遥感地质找矿方法随着遥感成像技术的发展而发展,传感器的发展使得探测波段不断细分,光谱分辨率不断提高,从而提高了遥感地质找矿的精度,使地质找矿从定性化到定量化转变。总结近几十年来多光谱与高光谱遥感成像技术的发展过程,并概括... 详细信息

遥感地质找矿方法随着遥感成像技术的发展而发展,传感器的发展使得探测波段不断细分,光谱分辨率不断提高,从而提高了遥感地质找矿的精度,使地质找矿从定性化到定量化转变。总结近几十年来多光谱与高光谱遥感成像技术的发展过程,并概括在此发展过程中相关找矿方法的发展,从多光谱成像与高光谱成像的发展2个方面介绍了相应的找矿方法与找矿应用,论述遥感技术在地质找矿中的应用趋势,并对目前遥感找矿领域中的相关难点进行了总结。

关键词：遥感技术高光谱地质找矿光谱解混矿产预测地物分类

在线全文

学校读者我要写书评

暂无评论

川中川南过渡带嘉二段成藏条件及主控因素

西南石油学院学报 2006年第6期28卷 9-12页

作者：赵永刚陈景山雷卞军李延钧杨金利西安石油大学油气资源学院陕西西安710065 西南石油大学资源与环境学院四川成都610500 中国石油西南油气田分公司川中油气矿四川遂宁629000

研究区嘉二段构造起伏平缓,断裂及裂缝相对较小,碳酸盐岩和蒸发岩发育,基本属于(半)局限-蒸发台地相,部分属于开阔台地相。台内滩、台内雏滩、(半)局限台地泻湖和(半)局限台地潮坪等亚相影响储层的形成和发育;蒸发台地泻湖、蒸发台地潮... 详细信息

研究区嘉二段构造起伏平缓,断裂及裂缝相对较小,碳酸盐岩和蒸发岩发育,基本属于(半)局限-蒸发台地相,部分属于开阔台地相。台内滩、台内雏滩、(半)局限台地泻湖和(半)局限台地潮坪等亚相影响储层的形成和发育;蒸发台地泻湖、蒸发台地潮坪和局限台地泻湖等亚相控制盖层的分布。通过对烃源条件、储盖组合、圈闭类型、天然气运聚特征和保存条件等方面的详细分析,认为川中川南过渡带嘉二气藏成藏条件优越,具有形成中型气藏的潜力,其中天然气的近源垂向运聚和理想的保存条件,是形成嘉二气藏的重要保障。有利的沉积亚相、建设性成岩作用、背斜构造、烃源断层和硬石膏岩层是该气藏的成藏主控因素。烃源断层和硬石膏岩层的分布,为油气聚集层位及有利成藏区块的确定提供了重要信息。

关键词：嘉二段成藏主控因素烃源断层硬石膏四川盆地

Network meta-analysis of combination strategies in metastatic hormone-sensitive prostate cancer

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2024年第4期26卷 402-408页

作者： shan-shan Wang Xiao-Jie bian Jun-Long Wu Bei-He Wang Sheng Zhang Ding-Wei Ye Department of Urology Fudan University Shanghai Cancer CenterShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China Department of Medical Oncology Fudan University Shanghai Cancer CenterShanghai 200032China.

This study compared different doublet and triplet therapies for efficacy and safety in metastatic hormone-sensitive prostate cancer(mHSPC).PubMed,EMBASE,and the Cochrane Library were comprehensively searched for eligible randomized controlled trials(RCTs)published from inception to October *** included abiraterone,apalutamide,enzalutamide,docetaxel,darolutamide,and androgen deprivation therapy(ADT),either as doublet or triplet *** outcomes examined were overall survival(OS),progression-free survival(PFS),castration-resistant prostate cancer(CRPC)-free survival,time to symptomatic skeletal event(SSE),and *** surface under the cumulative ranking curve(SUCRA)was determined to identify the preferred *** RCTs were *** combination of darolutamide,docetaxel,and ADT had the highest SUCRA of 84.3 for OS,followed by combined abiraterone,docetaxel,and ADT(SUCRA=71.6).The highest SUCRAs for PFS were observed for triplet therapies(abiraterone,docetaxel,and ADT[SUCRA=74.9],followed by enzalutamide,docetaxel,and ADT[SUCRA=74.3])and other androgen receptor axis-targeted therapy-based doublet therapies(SUCRAs:26.5–59.3).Darolutamide,docetaxel,and ADT had the highest SUCRAs,i.e.,80.8 and 84.0 regarding CRPC-free survival and time to SSE,*** Grade>3 adverse events(AEs),the SUCRAs of triplet therapies(SUCRAs:14.8–31.5)were similar to that of docetaxel and ADT(SUCRA=39.5).Three studies had a low risk of bias in all categories;the remaining studies had at least an unclear risk of bias in at least one *** therapy demonstrated potentially enhanced effectiveness than doublet therapy in mHSPC,with acceptable safety *** might be the optimal option for triplet therapy in combination with docetaxel and ADT.

关键词： androgen antagonist androgen receptor antagonist docetaxel meta-analysis prostatic neoplasm

Role of transport polarization in electrocatalysis:A case study of the Ni-cluster/Graphene interface

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 Materials Science & Technology 2021年第33期92卷 120-128页

作者： Fang bian Xin Ge Wu shan shan Li Gao Wu Qin Xiang Ying Meng Yin Wang Hong Wei Yang School of Materials Science and Engineering Northeastern UniversityShenyang 110819China College of Sciences Northeastern UniversityShenyang 110819China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China International Centre of Quantum and Molecular Structures and Department of Physics Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Kunming Precious Metals New Materials Technology Co.Ltd.Kunming 650106China

As cathodes,iron-series(Fe,Co,Ni)clusters supported by carbon materials exhibit outstanding electrocatalytic reduction activities in many electrocatalytic *** date,this general characteristic of ironseries clusters that should be related to the inherent attributes of these electrodes has not been fully understood from the perspectives of thermodynamics and electronic structure *** transport is a necessary process in electrocatalysis,and therefore,the study of the change of the electronic state in electron transport is beneficial for understanding this general characteristic of iron-series cluster *** this work,the electron transport properties,including the conductivity and transport spin-polarization at the Ni-cluster/graphene interface are carefully investigated as an example of carbon-supported iron-series *** first-principles calculations within the framework of the nonequilibrium Green’s function density functional theory(NEGF-DFT),we reveal that the electronic transport states of the coupled Ni-cluster/graphene are strongly changed compared to those of their isolated Ni-cluster and graphene *** is found that graphene dominates the overall conductivity of the interface,while the morphology of Ni-clusters controls the spin polarization *** spin polarization can lead to the self-excitation effect of the electrons that raises the energy of the electronic system,improves the thermodynamics of the reduction reaction and promotes catalytic *** work hints that iron-series elements(Fe,Co,Ni)based electrodes may generally show transport polarization that is likely to give rise to a high electrocatalytic reduction activity and such transport polarizability can be used as a new factor in the further exploration and design for electrocatalytic materials.

关键词： First-principles calculations electrocatalysis non-equilibrium electron injection transport polarization Ni-cluster/graphene

Inverse design of mechanical metamaterial achieving a prescribedconstitutive curve

在线全文

学校读者我要写书评

暂无评论

Theoretical & Applied Mechanics Letters 2024年第1期14卷 16-22页

作者： Zongliang Du Tanghuai bian Xiaoqiang Ren Yibo Jia shan Tang Tianchen Cui Xu Guo State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentDepartment of Engineering MechanicsDalian University of TechnologyDalian 116023China Ningbo Institute of Dalian University of Technology Ningbo 315016China

Besides exhibiting excellent capabilities such as energy absorption,phase-transforming metamaterials offer a vast design space for achieving nonlinear constitutive *** is facilitated by switching between different patterns under ***,the related inverse design problem is quite challenging,due to the lack of appropriate mathematical formulation and the convergence issue in the post-buckling analysis of intermediate *** this work,periodic unit cells are explicitly described by the moving morphable voids method and effectively analyzed by eliminating the degrees of freedom in void ***,by exploring the Pareto frontiers between error and cost,an inverse design formulation is proposed for unit *** formulation aims to achieve a prescribed constitutive curve and is validated through numerical examples and experimental *** design approach presented here can be extended to the inverse design of other types of mechanical metamaterials with prescribed nonlinear effective properties.

关键词： Metamaterial Pattern-transformation Constitutive curve Inverse design

Circulating circRNA expression profile and its potential role in late recurrence of paroxysmal atrial fibrillation post catheter ablation

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2023年第11期20卷 788-800页

作者： shan-shan LIU Hong-Yang GUO Jian ZHU Jin-Ling MA Sai-Zhe LIU Kun-Lun HE Su-Yan bian Department of Cardiology the Second Medical CenterNational Clinical Research Center of Geriatric DiseaseBeijing Key Laboratory of Chronic Heart Failure Precision MedicineChinese PLA General HospitalBeijingChina Department of Cardiology the Six Medical CenterChinese PLA General HospitalBeijingChina Medical Big Data Research Center Medical Innovation Research DepartmentBeijing Key Laboratory of Chronic Heart Failure Precision MedicineChinese PLA General HospitalBeijingChina

BACKGROUND Catheter-based pulmonary vein isolation(PVI) is an effective and well-established intervention for symptomatic paroxysmal atrial fibrillation(PAF). Nevertheless, late recurrences of atrial fibrillation(LRAF) occurring during 3 to 12months are common, and the underlying mechanisms remain elusive. Circular RNAs(circ RNAs) in atrial tissue have been linked to the pathophysiological mechanisms and progression of PAF in a few studies. However, their expression patterns in peripheral blood and regulatory function in LRAF are not *** In the present study, the expression profile of circulating circ RNAs in three paired nonvalvular PAF patients with or without LRAF was investigated by high-throughput sequencing and validated by quantitative real-time polymerase chain reaction(q RT-PCR). Bioinformatics analyses, including Gene Ontology(GO), Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis, and circ RNA/mi RNA regulatory network, were performed to predict the functions and potential regulatory roles of differentially expressed(DE) circ *** A total of 12,834 circ RNAs, comprising 5,491 down-regulated and 7,343 up-regulated circ RNAs, were found to be DE in blood smaples from the two groups in peripheral blood between LRAF and non-recurrence control individuals. The most enriched GO categories in terms of molecular function, biological process, and cellular component features were catalytic activity,cellular metabolic process, and intracellular part, respectively. The KEGG enrichment study revealed that the most important metabolic process controlled by DE circ RNAs is endocytosis. In the circ RNA/micro RNAs interaction network, four up-regulated circ RNAs(hsa_circ_0002665, hsa_circ_0001953, hsa_circ_0003831, and hsa_circ_0040533) and one down-regulated circ RNA(hsa_circ_0041103) were predicted to play potential regulatory roles in the pathogenesis of *** This investigation discovered the expression pattern of circulating c

关键词： atrial fibrillation paroxysmal

Poly(2-acetoxyethyl methacrylate)/polystyrene latex interpenetrating polymer networks with well-defined phase-separated structure

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第12期22卷 1505-1508页

作者： Tao Wang shan Shi Li Na bian Li Min Zhou Li Qun Zhao Key Laboratory of Applied Technology of Polymer Materials College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang 110142 China Department of Production Science and Technology Faculty of Engineering Gunma University Ota 373-0057 Japan

A series of poly（2-acetoxyethyl methacrylate）/polystyrene（PAEMA/PS） latex interpenetrating polymer networks（LIPNs） were prepared by seeded soap-free emulsion polymerization of styrene on the crosslinked PAEMA seed particles using an oil-soluble *** PAEMA/PS LIPNs showed a well-defined phase-separated structure with PS phase dispersing in continuous PAEMA *** domain size of PS phase was found to depend on the crosslinking degree of PAEMA seed particles and the amount of second-stage styrene monomer.

关键词： Phase-separation IPN Seeded soap-free emulsion polymerization Crosslinking Particle