检索结果-南通市图书馆

Electrocatalytic synthesis of C-N coupling compounds from CO_(2) and nitrogenous species

SusMat 2024年第2期4卷 51-74页

作者： Zheng Zhang Danyang Li Yunchuan Tu Jiao Deng Huiting Bi Yongchao Yao Yan Wang Tingshuai Li Yongsong Luo Shengjun Sun Dongdong Zheng Sónia A.C.Carabineiro Zhou Chen Junjiang zhu Xuping Sun Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing&Finishing College of Chemistry and Chemical EngineeringWuhan Textile UniversityWuhanHubeiChina School of Chemistry and Chemical Engineering Chongqing UniversityChongqingChina i-Lab Vacuum Interconnected NanotechWorkstation(Nano-X)Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhouJiangsuChina Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduSichuanChina College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinanShandongChina LAQV-REQUIMTE Department of ChemistryNOVA School of Science and TechnologyUniversidade NOVA de Lisboa2829-516 CaparicaPortugal College of Materials Xiamen UniversityXiamenFujianChina

The electrocatalytic synthesis of C-N coupling compounds from CO_(2) and nitrogenous species not only offers an effective avenue to achieve carbon neutral-ity and reduce environmental pollution,but also establishes a route to synthesize valuable chemicals,such as urea,amide,and *** innovative approach expands the application range and product categories beyond simple carbona-ceous species in electrocatalytic CO_(2) reduction,which is becoming a rapidly advancing *** review summarizes the research progress in electrocatalytic urea synthesis,using N_(2),NO_(2)^(-),and NO_(3)^(-)as nitrogenous species,and explores emerging trends in the electrosynthesis of amide and amine from CO_(2) and nitro-gen ***,the future opportunities in this field are highlighted,including electrosynthesis of amino acids and other compounds containing C-N bonds,anodic C-N coupling reactions beyond water oxidation,and the catalytic mechanism of corresponding *** critical review also captures the insights aimed at accelerating the development of electrochemical C-N coupling reactions,confirming the superiority of this electrochemical method over the traditional techniques.

关键词： C-N coupling CO_(2) reduction electrocatalysis nitrogenous species reaction mechanism

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

RIS-Assisted Over-the-Air Federated Learning in Millimeter Wave MIMO Networks

引用

Journal of Communications and Information Networks 2022年第2期7卷 145-156页

作者： lin Hu Zhibin Wang Hongbin zhu Yong Zhou School of Information Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China

In this paper,we propose a reconfigurable intelligent surface(RIS)assisted over-the-air federated learning(FL),where multiple antennas are deployed at each edge device to enable simultaneous multidimensional model transmission over a millimeter wave(mmWave)*** conduct rigorous convergence analysis for the proposed FL system,taking into account dynamic channel fading and analog *** by the convergence analysis,we propose to jointly optimize the receive digital and analog beamforming matrices at the access point,the RIS phase-shift matrix,as well as the transmit beamforming matrices at transmitting devices to minimize the transmission *** optimization variable coupling and non-convex constraints make the formulated problem challenging to be *** this end,we develop a low-complexity Riemannian conjugate gradient(RCG)-based algorithm to solve the unit modulus constraints and decouple the optimization *** show that the proposed RCG algorithm outperforms the successive convex approximation algorithm in terms of the learning performance.

关键词： reconfigurable intelligent surface federated learning Riemannian conjugate gradient over-the-air computation

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

Effects of Plant Types on Physico-chemical Properties of Reclaimed Mining Soil in Inner Mongolia,China

引用

Chinese Geographical Science 2010年第4期20卷 309-317页

作者： FU Yao lin Changcun MA Jianjun zhu Tingcheng Key Laboratory for Vegetation Ecology of Ministry of Education Institute of Grassland Science Northeast Normal University Changehun 130024 China College of Animal Science and Technology China Agricultural University Beijing 100193 China Chinese Research Academy of Environmental Sciences Beijing 100012 China Langfang Normal College Langfang 065000 China

A field experiment was conducted in Jungar Banner,Inner Mongolia,China to study the effects of plant types on the physical structure and chemical properties of open-cast mining soils reclaimed for 15 years,and to analyze the triggering factors of the soil *** indicate that plant types affect soil-forming process especially in the upper layer (0-20 cm),and the spatial structure of reclaimed plant is the main reason for variability of the soil-forming *** the upper soil layer at the site reclaimed with mixed plants,the concentrations of soil organic matter (SOM) and soil organic carbon (SOC) are the highest,and they were significantly higher at the sites reclaimed with Leymus chinensis,Caragana sinica,which is mainly due to a large amount of litter fall and root exudation in herbages and ***,the concentrations of SOM and SOC in the soils at the reclaimed sites are quite low comparing with those in local primary soil,which indicates the importance of using organic amendments during the ecological restoration in the study area.

关键词： open-cast coal mining mining reclamation soil physico-chemical property soil organic matter soil organic carbon

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

Quasi-shadowing Property on Random Partially Hyperbolic Sets

引用

Acta Mathematica Sinica,English Series 2018年第9期34卷 1429-1444页

作者： lin WANG Xin Sheng WANG Yu Jun zhu School of Applied Mathematics Shanxi University of Finance and Economics Taiyuan 030006 P. R. China College of Mathematics and Information Science Hebei Normal University Shijiazhuang 050024 P. R. China School of Mathematical Sciences Xiamen University Xiamen 361005 P. R. China

Abstract In this paper we investigate the quasi-shadowing property for C1 random dynamical sys-terns on their random partially hyperbolic sets. It is shown that for any pseudo orbit {xk}＋∞ -∞ on a random partially hyperbolic set there exists a ＂center＂ pseudo orbit {Yk}＋∞ -∞ shadowing it in the sense that yk＋l is obtained from the image of yk by a motion along the center direction. Moreover, when the random partially hyperbolic set has a local product structure, the above ＂center＂ pseudo orbit{yk}＋∞ -∞ can be chosen such that yk＋1 and the image of yk lie in their common center leaf.

关键词： Quasi-shadowing property random partially hyperbolic set local product structure

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

Evaluation of the Visible and Shortwave Infrared Drought Index in China

引用

International Journal of Disaster Risk Science 2013年第2期4卷 68-76页

作者： Ning Zhang Yang Hong Qiming Qin lin zhu Institute of Remote Sensing and GIS Peking UniversityBeijing 100871China School of Civil Engineering and Environmental Sciences University of OklahomaOK 73072USA National Satellite Meteorological Center of China Meteorological Administration Beijing 100081China

In this article, the performance of the Visible and Shortwave infrared Drought Index(VSDI), a drought index recently developed and validated in Oklahoma, United States, is further explored and validated in China. The in-situ measured soil moisture from 585 weather stations across China are used as ground-truth data, and five commonly used drought indices are compared with VSDI for surface drought monitoring. The results reveal that VSDI is robust and reliable in the estimation of surface dryness—it has the highest correlation with soil moisture among the six indices when computed using both the original and cloud removed data. All six indices show the highest correlation with soil moisture at the 10 cm layer and the averaged 10–50 cm layer. The spatiotemporal patterns of surface moisture indicated by the MODIS-based VSDI are further compared with the precipitation-based drought maps and the Global Land Data Assimilation System(GLDAS) simulated surface soil moisture maps over five provinces located in the Middle-Lower Yangtze Plain of China. The results indicate that despite the difference between the spatial and temporal resolutions of the three products, the VSDI maps still show good agreement with the other two drought products through the rapidly alternating drought and flood events in 2011 in this region. Therefore, VSDI can be used as an effective surface wetness indicator at both the provincial and the national scales in China.

关键词： China. drought moisture

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

基于内质网应激探讨越婢加术汤对糖尿病肾病患者的治疗机制

引用

广州中医药大学学报 2024年第2期41卷 299-305页

作者：黄赛娇林意卢艳朱叶琼海市中医院海南琼海571400

【目的】基于内质网应激(endoplasmic reticulum stress,ERS)探讨越婢加术汤对糖尿病肾病(diabetic kidney disease,DKD)的治疗机制。【方法】将114例脾肾阳虚型DKD患者随机分为观察组和对照组,每组各57例。对照组给予常规西医治疗,观... 详细信息

【目的】基于内质网应激(endoplasmic reticulum stress,ERS)探讨越婢加术汤对糖尿病肾病(diabetic kidney disease,DKD)的治疗机制。【方法】将114例脾肾阳虚型DKD患者随机分为观察组和对照组,每组各57例。对照组给予常规西医治疗,观察组在对照组的基础上联合越婢加术汤治疗,疗程为3个月。观察2组患者治疗前后中医证候积分(包括主症积分和次症积分)、血糖指标[空腹血糖(FPG)、糖化血红蛋白(HbA1c)]、肾功能指标[尿素氮(BUN)、24 h尿蛋白、肌酐(SCr)]、ERS相关指标[葡萄糖调节蛋白78(GRP78)、蛋白激酶R样内质网激酶(PERK)、C/EBP同源蛋白(CHOP)],并评价2组患者的临床疗效和安全性。【结果】(1)疗效方面,治疗3个月后,观察组的总有效率为91.23%(52/57),对照组为70.18%(40/57),组间比较,观察组的临床疗效明显优于对照组(P<0.01)。(2)中医证候积分方面,治疗后,2组患者的主症积分和次症积分均较治疗前明显降低(P<0.01),且观察组对主症积分和次症积分的降低作用均明显优于对照组(P<0.01)。(3)血糖和肾功能方面,治疗后,2组患者的FPG、HbA1c、SCr、24 h尿蛋白、BUN水平均较治疗前明显降低(P<0.05或P<0.01),且观察组对FPG、HbA1c、SCr、24 h尿蛋白、BUN水平的降低作用均明显优于对照组(P<0.01)。(4)ERS方面,治疗后,2组患者的GRP78、PERK、CHOP mRNA表达水平均较治疗前明显降低(P<0.01),且观察组对GRP78、PERK、CHOP mRNA表达水平的降低作用均明显优于对照组(P<0.05)。(5)安全性方面,治疗期间,2组患者均未发生严重不良反应,患者的血压、心电图、血常规、肝功能等均未见明显异常,具有较高的安全性。【结论】越婢加术汤治疗脾肾阳虚型DKD患者疗效确切,有助于缓解患者临床症状,改善患者肾功能和血糖水平,其疗效机制可能与抑制内质网应激有关。

关键词：越婢加术汤糖尿病肾病脾肾阳虚肾功能血糖内质网应激治疗机制

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

Neutralization of SARS-CoV-2 infection by antibodies targeting diverse epitopes

引用

Genes & Diseases 2024年第4期11卷 134-137页

作者： Shusheng Wang Yunji Liao Kaiyong Yang Hang Ma Zhangyi Song Haiqiu Huang Li Zhang Ailing Wang Lei Han Jiawei Zhang Hui Chen Haiyang Yin Yantin Bian Hua Jiang Xiaodong Xiao Yueqing Xie Yunsheng Yuan Jianwei zhu Engineering Research Center of Cell and Therapeutic Antibody Ministry of EducationSchool of PharmacyShanghai Jiao Tong UniversityShanghai 200240China Jecho Laboratories Inc.FrederickMD 21704USA Jecho Institute Co. Ltd.Shanghai 200240China

The CoVID-19 pandemic that started in late 2019 is sweeping through the world,posing historic challenges to global health,and disrupting social and economic *** and recent studies indicate that monoclonal antibodies can be efficacious in preventing and treating SARSCoV-1 and SARS-CoV-2 *** a phage display platform,we have identified dozens of monoclonal antibodies that bind to diverse epitope groups on the SARS-CoV-2 spike *** of them bound to the receptor binding domain(RBD)and inhibited ACE2-RBD interaction.

关键词： antibodies inhibited monoclonal

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

南海北部水合物区HD109站位沉积物及孔隙水特征对甲烷渗漏的响应:来自元素和钡同位素的记录

引用

地质学报 2024年第9期98卷 2607-2618页

作者：朱碧艾鑫宇葛璐杨涛河海大学地球科学与工程学院地球关键带研究所江苏南京211106 南京大学内生金属成矿机制研究国家重点实验室江苏南京210023

甲烷渗漏活动及甲烷厌氧氧化作用(AOM)不仅导致特定自生矿物的形成,更会引起沉积物-孔隙水体系中元素和同位素组成的变化。本研究对南海北部水合物赋存区HD109站位开展了沉积物-孔隙水的Ba同位素及微量元素特征研究,综合分析了沉积物-... 详细信息

甲烷渗漏活动及甲烷厌氧氧化作用(AOM)不仅导致特定自生矿物的形成,更会引起沉积物-孔隙水体系中元素和同位素组成的变化。本研究对南海北部水合物赋存区HD109站位开展了沉积物-孔隙水的Ba同位素及微量元素特征研究,综合分析了沉积物-孔隙水的氧化还原敏感元素(Mo、U)、Ba及Ba同位素特征对古今硫酸盐-甲烷转换带(SMTZ)及甲烷渗漏事件的指示。HD109站位孔隙水元素变化特征显示了清晰的地球化学分带,由上至下包括Fe-Mn还原带、硫酸盐还原带和硫酸盐-甲烷过渡带。沉积物Ba元素特征显示现今SMTZ上方有较为明显的钡峰(Ba/Al高值)发育,沉积物浅部Mo、U富集层位及相邻层位Ba/Al值特征综合指示了浅部古钡峰及古SMTZ的存在,代表沉积历史上甲烷渗漏通量较高事件。孔隙水δ^(138/134)Ba值普遍高于海洋颗粒钡及碎屑钡的δ^(138/134)Ba值,反映了沉积物中成岩重晶石溶解的贡献,其中,现代钡峰附近孔隙水具有明显的δ^(138/134)Ba峰值,显示孔隙水δ^(138/134)Ba对自生重晶石沉淀过程有较显著的响应。

关键词：甲烷渗漏 Ba同位素硫酸盐-甲烷转换带南海北部

来源：

维普期刊数据库

同方期刊数据库

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

可重构智能表面辅助双功能雷达通信系统的联合波束优化

引用

电子与信息学报 2024年第1期46卷 222-228页

作者：王华华孙宸朱鹏云重庆邮电大学通信与信息工程学院重庆400065

双功能雷达通信系统(DFRC)是有效解决未来网络频谱资源拥挤问题的理想技术之一,该文引入了可重构智能表面(RIS)技术,旨在提升用户的加权和速率和系统的探测性能。首先在雷达功率约束和可重构智能表面的恒定模约束以及通信的整体功率预算... 详细信息

双功能雷达通信系统(DFRC)是有效解决未来网络频谱资源拥挤问题的理想技术之一,该文引入了可重构智能表面(RIS)技术,旨在提升用户的加权和速率和系统的探测性能。首先在雷达功率约束和可重构智能表面的恒定模约束以及通信的整体功率预算下,构建了通信用户的加权和速率和系统探测性能最大化的优化模型。通过联合优化基站的主动波束和可重构智能表面的无源被动波束形成,该文设计了一种有效的基于加权最小均方误差、分式规划和流形优化的交替优化算法,将非凸优化问题转化为两个子问题并利用迭代进行求解。仿真结果表明,所提方案对解决该问题的有效性和对用户加权和速率在较低迭代次数下达到收敛,并且可使用户的加权和速率上限提升0.86 bit/(s·Hz)和使系统探测更具方向性。

关键词：双功能雷达通信可重构智能表面波束成形加权和速率

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

Evaluation of Ocean Data Assimilation in CAS-ESM-C:Constraining the SST Field

引用

Advances in Atmospheric Sciences 2016年第7期33卷 795-807页

作者： Xiao DONG Renping lin Jiang zhu Zeting LU International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 University of Chinese Academy of Sciences Beijing 100049 Troop 61741 PLABeijing 100094

A weakly coupled assimilation system, in which SST observations are assimilated into a coupled climate model （CAS- ESM-C） through an ensemble optimal interpolation scheme, was established. This system is a useful tool for historical climate simulation, showing substantial advantages, including maintaining the atmospheric feedback, and keeping the oceanic tields from drifting far away from the observation, among others. During the coupled model integration, the bias of both surface and subsurface oceanic fields in the analysis can be reduced compared to unassimilated fields. Based on 30 model years of *** fiom the system, the climatology and imerannual variability of the climate system were evaluated. The results showed that the system can reasonably reproduce the climatological global precipitation and SLP, bul it still sutters from the double ITCZ problem. Besides, the ENSO footprint, which is revealed by ENSO-related surface air temperature, geopotential height and precipitation during El Nifio evolution, is basically reproduced by the system. The system can also simulate the observed SST-rainfall relationships well on both interannual and intraseasonal timescales in the western North Pacific region, in which atmospheric feedback is crucial for climate simulation.

关键词： ocean data assimilation ensemble optimal interpolation CAS-ESM-C ENSO footprint atmospheric feedback,air-sea interaction western North Pacific

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：