检索结果-南通市图书馆

In-situ grown CuO_(x)nanowire forest on copper foam:A 3D hierarchical and freestanding electrocatalyst with enhanced carbonaceous product selectivity in CO_(2)reduction

引用

Nano Research Energy 2022年第3期1卷 44-51页

作者： wenjun Zhang Minghang Jiang Songyuan Yang Yi Hu Bin mu Zuoxiu Tie Zhong Jin MOE Key Laboratory of Mesoscopic Chemistry MOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Nanjing Tieming Energy Technology Co.Ltd. Nanjing 210093China Suzhou Tierui New Energy Technology Co.Ltd. Suzhou 215228China School for Engineering of Matter Transportand EnergyArizona State University501 East Tyler MallTempeAZ 85287USA

Electrocatalytic carbon dioxide(CO_(2))reduction is considered as an economical and environmentally friendly approach to neutralizing and recycling greenhouse gas CO_(2).However,the design of preeminent and robust electrocatalysts for CO_(2)electroreduction is still ***,we report the in-situ growth of dense CuO_(x)nanowire forest on 3D porous Cu foam(CuO_(x)-NWF@Cu-F),which can be directly applied as a freestanding and binder-free working electrode for highly effective electrocatalytic CO_(2)*** adjusting the surface morphology and chemical composition of CuO_(x)nanowires via surface reconstruction,large electrochemically active surface area and abundant Cu(+1)sites were generated,leading to remarkable activity for CO_(2)*** as-prepared hierarchical conductive electrode exhibited an enhanced Faradaic efficiency of 15.0%for ethanol formation(FE_(C_(2)H_(5)OH))and a total Faradaic efficiency of 69.4%for all carbonaceous compounds(FE_(C-total))at a mild applied potential of–0.45 V *** in 0.1 M KHCO_(3)*** achieved a 4-fold increase in FE_(C-total)than that of Cu nanowire forest supported on 3D porous Cu foam(Cu-NWF@Cu-F)obtained by in-situ reduction of the CuO_(x)-NWF@Cu-F via annealing at H_(2)atmosphere,and thereby effectively suppressed the hydrogen evolution side-reaction.

关键词： electrocatalytic CO_(2)reduction CuO_(x)nanowire forest 3D hierarchical nanostructure surface reconstruction enhanced carbonaceous product selectivity

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

Design and Implementation of a TDD-Based 128-Antenna Massive MIMO Prototype System

引用

China Communications 2017年第12期14卷 162-187页

作者： Xi Yang wenjun Lu Ning Wang Karl Nieman Chao-Kai Wen Chuan Zhang Shi Jin Xiaomin mu Ian Wong Yongming Huang Xiaohu You National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing 210003 China School of Information Engineering Zhengzhou University Zhengzhou 450001 China National Instruments Austin 78759 Texas USA Institute of Communications Engineering National Sun Yat-sen University Kaohsiung 804 Taiwan China

Owing to the dramatic mobile IP growth,the emerging Internet of Things,and cloud-based applications,wireless networking is witnessing a paradigm *** fully exploiting spatial degrees of freedom,massive multiple-input-multiple-output(MIMO) systems promise significant gains in data rates and link *** the research community has recognized the theoretical benefits of these systems,building the hardware of such complex systems is a challenge in *** paper presents a time division duplex(TDD)-based 128-antenna massive MIMO prototype system from theory to ***,an analytical signal model is provided to facilitate the setup of a feasible massive MIMO prototype ***,a link-level simulation consistent with practical TDDbased massive MIMO systems is conducted to guide and validate the massive MIMO system *** design and implement the TDDbased 128-antenna massive MIMO prototype system with the guidelines obtained from the link-level *** real-time video transmission and downlink data transmission under the configuration of multiple single-antenna users are *** withstate-of-the-art prototypes demonstrate the advantages of the proposed system in terms of antenna number,bandwidth,latency,and *** proposed system is also equipped with scalability,which makes the system applicable to a wide range of massive scenarios.

关键词： massive MIMO prototyping sys-tem software defined radio TDD

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

Distance-basedα-amylase biosensor fabricated with amylopectin-coated mesoporous membrane

引用

Chinese Chemical Letters 2024年第1期35卷 446-450页

作者： Binglu Zhao Mashooq Khan Yulin Liu wenjun Tai Chongyang mu Wenli Wu Mei Zhao Yaohong Ma Li Yu Jin-Ming Lin Qiongzheng Hu Qilu University of Technology(Shandong Academy of Sciences) Shandong Analysis and Test CenterJi’nan 250014China School of Pharmaceutical Sciences Qilu University of Technology(Shandong Academy of Sciences)Ji’nan 250014China Key Laboratory of Colloid and Interface Chemistry Shandong UniversityMinistry of EducationJi’nan 250100China Key Laboratory for Biosensors of Shandong Province Biology InstituteQilu University of Technology(Shandong Academy of Sciences)Ji’nan 250353China Beijing Key Laboratory of Microanalytical Methods and Instrumentation MOE Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical BiologyDepartment of ChemistryTsinghua UniversityBeijing 100084China

Paper-based biosensors are widely employed in point-of-care testing(POCT)due to their convenience,portability,low cost,and ease of *** study reports an integrated distance-based paper biosensor fabricated with a mesoporous membrane coated with stimuli-responsive *** detection ofα-amylase(AMY)using amylopectin-coated mesoporous membrane is demonstrated as an *** introducing the AMY solution,it is observed that the aqueous solution flows along the paper strip due to AMY-catalyzed hydrolysis of *** flow distance is proportional to the concentration of AMY with a detection limit as low as 4 mu/*** addition,the detection of AMY is demonstrated in human ***,the inhibitory effect of acarbose on AMY is *** reagent-free and disposable biosensor allows single-step rapid detection of the *** approach is very promising for the development of user-friendly,equipment-free,and cost-effective biosensors with remarkable sensitivity and excellent selectivity for disease diagnosis and hypoglycemic drug screening.

关键词： Paper biosensor α-Amylase Stimuli-responsive polymer Mesoporous membrane Distance Point-of-care testing

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

Enhanced Beta2-band Oscillations Denote Auditory Hallucination in Schizophrenia Patients and a Monkey Model of Psychosis

引用

Neuroscience Bulletin 2024年第3期40卷 325-338页

作者： Shuo Ma Tianzhen Chen wenjun Jia Jie Liu Shihan Ding Puzhe Li Hong Gan Dapeng Zhang Shuxin Shao mu-Ming Poo Min Zhao Bomin Sun Jian Jiang Department of Neurosurgery Ruijin HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200020China Shanghai Mental Health Center Shanghai Jiao Tong University School of MedicineShanghai200030China Shanghai Center for Brain Science and Brain-inspired Technology Lingang LaboratoryShanghai201602China University of California at Berkeley BerkeleyCA94720USA School of Life Science and Technology ShanghaiTech UniversityShanghai201210China Institute of Neuroscience CAS Center for Excellence in Brain Science and Intelligence TechnologyCAS Key Laboratory of Primate NeurobiologyState Key Laboratory of NeuroscienceChinese Academy of SciencesShanghai200031China Shanghai Center for Brain Science and Brain-Inspired Intelligence Technology Lingang LaboratoryShanghai201210China Fuyang Third People’s Hospital Fuyang Mental Health CenterFuyang236052China Shanghai Key Laboratory of Psychotic Disorders Shanghai200030China Institute of Psychological and Behavioral Science Shanghai Jiao Tong UniversityShanghai200030China Shanghai Quanlan Technology Co. LtdShanghai201602China

An electroencephalographic(EEG)signature of auditory hallucinations(AHs)is important for facilitating the diagnosis and treatment of AHs in *** recorded EEG from 25 schizophrenia patients with recurrent *** the period of AHs,EEG recordings exhibited significantly elevated beta2-band power in the temporal region,as compared to those recorded in the absence of AHs or during stimulation with verbal *** further generated methamphetamine-treated rhesus monkeys exhibiting psychosis-like behaviors,including repetitive sudden searching actions in the absence of external intrusion,suggesting the occurrence of *** EEG beta2-band power in the temporal region of these monkeys was enhanced immediately after methamphetamine treatment and positively correlated with the frequency of sudden searching ***,the enhancement of temporal beta2-band oscillations represents a signature for AHs in both patients and a monkey model of psychosis,and this monkey model can be used for developing closed-loop neuromodulation approaches for the treatment of refractory AHs in schizophrenia.

关键词： Schizophrenia Auditory hallucinations Non-human primate Methamphetamine Electroencephalography

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

男性强直性脊柱炎患者中医证型与骨密度关系及低骨密度危险因素分析

引用

中国中医药信息杂志 2020年第9期27卷 35-40页

作者：孙文婷郑丹妮杨爱娟胡丽芳穆闻君李孟霞罗静陶庆文阎小萍孔维萍北京中医药大学研究生院北京100029 中日友好医院北京100029 免疫炎性疾病北京市重点实验室北京100029

目的分析男性强直性脊柱炎(AS)中医证型与骨密度的关系及低骨密度发生的危险因素。方法收集2013年9月-2018年9月中日友好医院中医风湿科男性AS患者192例,其中肾虚督寒证106例、肾虚湿热证86例,分析不同证型、不同骨密度患者的临床资料,... 详细信息

目的分析男性强直性脊柱炎(AS)中医证型与骨密度的关系及低骨密度发生的危险因素。方法收集2013年9月-2018年9月中日友好医院中医风湿科男性AS患者192例,其中肾虚督寒证106例、肾虚湿热证86例,分析不同证型、不同骨密度患者的临床资料,采用Logistic回归模型分析患者低骨密度危险因素及不同中医证型患者低骨密度危险因素。结果肾虚湿热证患者全髋骨密度显著低于肾虚督寒证患者,肾虚湿热证患者病程、红细胞沉降率(ESR)、C-反应蛋白(CRP)、AS疾病活动评分(ASDAS-CRP)、Bath AS测量指数(BASMI)、改良Stoke AS脊柱评分(mSASSS)显著高于肾虚督寒证患者(P<0.05)。Logistic回归分析显示,肾虚湿热证型、病程、ESR、ASDAS-CRP、mSASSS、Bath AS功能指数(BASFI)、BASMI与全髋低骨密度的发生显著相关,肾虚督寒证患者疾病活动指标ESR、ASDAS-CRP是全髋低骨密度的危险因素,肾虚湿热证患者病程、ASDAS-CRP、mSASSS、BASFI是全髋低骨密度的危险因素(P<0.05)。结论肾虚湿热证患者全髋骨密度低于肾虚督寒证患者,肾虚湿热证型、病程、ESR、ASDAS-CRP、mSASSS、BASFI、BASMI是男性AS患者低骨密度发生危险因素。

关键词：强直性脊柱炎肾虚督寒证肾虚湿热证低骨密度

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

Q-switched fiber laser operating at 1.5 μm based on WTe_2

引用

Chinese Optics Letters 2019年第2期17卷 25-28页

作者： Mengli Liu Yuyi Ouyang Huanran Hou wenjun Liu Zhiyi Wei State Key Laboratory of Information Photonics and Optical Communications School of Science Beijing University of Posts and Telecommunications Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences

Compared with the extensively studied MoS2 and WS2, WTe_2 owns a smaller bandgap, which is applicable to a near-infrared system in photodetectors, communications, and ultrafast optics. In this work, the WTe_2 saturable absorber(SA) with the tapered fiber structure is prepared by the magnetron-sputtering technology, which enables the prepared SA to be low in cost and have strong nonlinearity. The modulation depth of the prepared WTe_2 SA is measured as 31.06%. The Q-switched fiber laser operating at 1.5 μm is successfully investigated by incorporating the proposed SA into the prepared ring cavity. To the best of our knowledge, this is the first attempt of WTe_2 in the Q-switched fiber laser at 1.5 μm.

关键词： Q-switched laser operating

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

基于注意力机制改进的SAB异步电机故障诊断

引用

振动．测试与诊断 2023年第3期43卷 603-608,626页

作者：令波杨咏穆旻皓张文俊武汉第二船舶设计研究所武汉430074 中国船舶集团第七〇四研究所上海200000

由于电机结构及其运行环境复杂,导致各类故障与故障特征存在较强的非线性关系,单一信号信息含量有限,无法满足诊断需求。针对此问题,以电流、磁场信号为监测信号,提出基于注意力机制改进的支持向量机-自适应提升算法(SVM-AdaBoost,简称S... 详细信息

由于电机结构及其运行环境复杂,导致各类故障与故障特征存在较强的非线性关系,单一信号信息含量有限,无法满足诊断需求。针对此问题,以电流、磁场信号为监测信号,提出基于注意力机制改进的支持向量机-自适应提升算法(SVM-AdaBoost,简称SAB)的故障诊断方法。首先,通过希尔伯特变换和快速傅里叶变换提取信号频域特征;其次,通过SAB分类器,对多源样本分别进行训练,获取各子分类器预测结果;最后,基于注意力机制调整权重矩阵参数,对电流、电磁信号进行信息融合,改进SAB分类器以提高故障诊断的准确率。研究结果表明:不同信号对各类故障的敏感程度不同;所提方法可以实现对转子断条故障、定子短路故障、轴承故障的诊断分类,与传统方法对比,该方法明显提高了故障诊断的鲁棒性和准确性。

关键词：异步电机故障诊断多传感器注意力机制支持向量机自适应提升算法

来源：

维普期刊数据库博看期刊

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

Interaction of Hepatitis B Virus X Protein with the Pregnane X Receptor Enhances the Synergistic Effects of Aflatoxin B1 and Hepatitis B Virus on Promoting Hepatocarcinogenesis

引用

Journal of Clinical and Translational Hepatology 2021年第4期9卷 466-476页

作者： Yongdong Niu Shaohua Fan Qin Luo Liming Chen Danmei Huang wenjun Chang Wenxin Qin Ganggang Shi Department of Pharmacology Shantou University Medical CollegeShantouGuangdongChina Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province School of Life ScienceJiangsu Normal UniversityXuzhouJiangsuChina State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer InstituteRenji HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Oncology First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdongChina Department of Environmental Hygiene Second Military Medical UniversityShanghaiChina

Background and Aims:Hepatitis B virus(HBV)infection has been found to increase hepatocellular sensitivity to carcinogenic xenobiotics,by unknown mechanisms,in the generation of hepatocellular *** pregnane X receptor(PXR)is a key regulator of the body’s defense against xenobiotics,including xenobiotic carcinogens and clinical *** this study,we aimed to investigate the molecular mechanisms of HBV X protein(HBx)-PXR signaling in the synergistic effects of chemical carcinogens in HBV-associated ***:The expression profile of PXR-cytochrome p4503A4(CYP3A4)signaling was determined by PCR,western blotting,and tissue *** viability and aflatoxin B1(AFB1)cytotoxicity were measured using the cell counting kit-8 *** gene expression was evaluated using transient transfection and real *** genotoxicity of AFB1 was assessed in newborn mice with a single dose of ***:HBx enhanced the hepatotoxicity of AFB1 by activating CYP3A4 and reducing glutathione Stransferase mu 1(GSTM1)in cell *** of PXR by pregnenolone 16α-carbonitrile increased AFB1-induced liver tumor incidence by up-regulating oncogenic KRAS to enhance interleukin(IL)-11:IL-11 receptor subunit alpha-1(IL11RA-1)-mediated inflammation in an HBx transgenic ***:Our finding regarding AFB1 toxicity enhancement by an HBx-PXR-CYP3A4/GSTM1-KRASIL11:IL11RA signaling axis provides a rational explanation for the synergistic effects of chemical carcinogens in HBV infection-associated hepatocarcinogenesis.

关键词： Liver cancer Hepatitis B virus X protein Pregnane X receptor Aflatoxin B1 Hepatotoxicity

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

C_(4)烃氧化制备甲基丙烯醛催化剂的研究进展

引用

石油炼制与化工 2023年第11期54卷 122-130页

作者：危长城蒋文军慕旭宏中国石化茂名分公司研究院广东茂名525000 中石化石油化工科学研究院有限公司

甲基丙烯酸甲酯(MMA)是一种重要的有机化工原料,被广泛用于制备表面涂层、合成树脂、油漆涂料和高分子材料等。随着我国石化工业的不断发展,特别是大型乙烯装置的建成,将会副产大量的C_(4)烃(异丁烷和异丁烯等),经C_(4)烃氧化法生产MMA... 详细信息

甲基丙烯酸甲酯(MMA)是一种重要的有机化工原料,被广泛用于制备表面涂层、合成树脂、油漆涂料和高分子材料等。随着我国石化工业的不断发展,特别是大型乙烯装置的建成,将会副产大量的C_(4)烃(异丁烷和异丁烯等),经C_(4)烃氧化法生产MMA清洁工艺表现出明显的经济和技术优势。其中,C_(4)烃氧化制备甲基丙烯醛(MAL)是C_(4)烃生产MMA的关键步骤。综述了C_(4)烃氧化制备MAL的催化剂(Mo-Bi系,Mo-Sb系,Mo-V-Te系,杂多酸系及V系等催化剂)的研究现状,并提出了未来催化剂的重点研究方向。

关键词： C_(4)烃氧化反应甲基丙烯醛催化剂 Mo-Bi氧化物

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

不同密度回转体高速倾斜入水空化数值模拟

引用

兵工学报 2020年第S1期41卷 116-121页

作者：穆青熊天红王康健易文俊管军南京理工大学瞬态物理国家重点实验室江苏南京210094

为探究回转体材料密度对其高速入水空化流动特性的影响,开展了回转体入水空化仿真研究。基于有限体积法和流体体积函数多相流模型、Schnerr-Sauer空化模型、SST k-ω湍流模型,结合动网格技术,对初速度为300 m/s的不同密度回转体倾斜入... 详细信息

为探究回转体材料密度对其高速入水空化流动特性的影响,开展了回转体入水空化仿真研究。基于有限体积法和流体体积函数多相流模型、Schnerr-Sauer空化模型、SST k-ω湍流模型,结合动网格技术,对初速度为300 m/s的不同密度回转体倾斜入水过程进行数值计算,分析不同密度回转体入水过程中的空泡形态发展规律、运动特性及流体动力特性的变化规律。结果表明:所提数值计算方法能够有效模拟回转体入水过程中的空泡形态变化过程,密度越大的回转体入水后产生的空泡轮廓直径越小,空泡越长,空泡开口处直径越小;不同密度回转体入水瞬间回转体表面压力峰值相当,但密度越大的回转体表面压力衰减越慢;密度较大的回转体入水瞬间加速度峰值越小,入水后速度衰减越慢,相同时间内入水深度越大。

关键词：回转体倾斜入水空化多相流数值模拟

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：