检索结果-南通市图书馆

Instability of parasitic capacitance in T-shape-gate enhancementmode AlGaN/GaN MIS-HEMTs

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2022年第3期43卷 74-77页

作者： lan Bi Yixu Yao Qimeng Jiang Sen Huang Xinhua Wang hao Jin Xinyue Dai Zhengyuan xu Jie Fan Haibo Yin Ke Wei Xinyu Liu High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Institute of Microelectronics University of Chinese Academy of SciencesBeijing 100049China

Parasitic capacitances associated with overhangs of the T-shape-gate enhancement-mode(E-mode)GaN-based power device,were investigated by frequency/voltage-dependent capacitance-voltage and inductive-load switching *** overhang capacitances induce a pinch-off voltage distinguished from that of the E-mode channel capacitance in the gate capacitance and the gatedrain capacitance characteristic ***-and voltage-dependent tests confirm the instability caused by the trapping of interface/bulk states in the LPCVD-SiNx passivation ***-level double pulse measurement also reveals its impact on switching transition for power switching applications.

关键词： AlGaN/GaN MIS-HEMTs enhancement-mode T-shape gate parasitic capacitance trapping/de-trapping capacitancevoltage hysteresis

Facile synthesis of high capacity P2-type Na_(2/3)Fe_(1/2)Mn_(1/2)O_(2) cathode material for sodium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2021年第7期31卷 2074-2080页

作者： Mu-lan QIN Chang-yu YIN Wen xu Yang LIU Jun-hao WEN Bin SHEN Wei-gang WANG Wan-min LIU Hunan Provincial Key Laboratory of Environmental Catalysis&Waste Recycling College of Materials and Chemical EngineeringHunan Institute of EngineeringXiangtan 411104China

P2-type Na_(2/3)Fe_(1/2)Mn_(1/2)O_(2) was synthesized by a facile sol−gel method,and the effect of calcination temperature on the structure,morphology and electrochemical performance of samples was *** results show that the sample obtained at 900℃ is pure P2-type Na_(2/3)Fe_(1/2)Mn_(1/2)O_(2) phase with good crystallization,which consists of hexagon plate-shaped particles with the size and thickness of 2−4μm and 200−400 nm,*** sample exhibits an initial specific discharge capacity of 243 mA·h/g at a current density of 26 mA/g with good cycling *** high specific capacity indicates that P2-type Na_(2/3)Fe_(1/2)Mn_(1/2)O_(2) is a promising cathode material for sodiumion batteries.

关键词： sodium-ion battery cathode material Na_(2/3)Fe_(1/2)Mn_(1/2)O_(2) electrochemical performance sol−gel method

p38丝裂原活化蛋白激酶在不可分型流感嗜血杆菌致人单核细胞炎症反应中的作用

在线全文

学校读者我要写书评

暂无评论

中华结核和呼吸杂志 2008年第5期31卷 348-351页

作者：徐志豪徐峰沈华浩李兰娟浙江大学医学院附属第二医院呼吸科杭州310009 附属第一医院感染科

目的通过不可分型流感嗜血杆菌（NTHi）与单核细胞相互作用，研究丝裂原活化蛋白激酶（MAPK）信号传导通路在NTHi致人体免疫细胞炎症反应中的作用。方法NTHi为临床分离株，经血清学方法和16SrRNA测序证实。外周血单核细胞来自健康成年... 详细信息

目的通过不可分型流感嗜血杆菌（NTHi）与单核细胞相互作用，研究丝裂原活化蛋白激酶（MAPK）信号传导通路在NTHi致人体免疫细胞炎症反应中的作用。方法NTHi为临床分离株，经血清学方法和16SrRNA测序证实。外周血单核细胞来自健康成年人静脉血，分为4组：培养基组、NTHi刺激组、SB203580（p38MAPK抑制剂）干预组和U0126（p44／42MAPK抑制剂）干预组。NTHi与单核细胞共培养1h、4h后收集细胞，用Western blot法检测p38、p44／42 MAPK的磷酸化程度；16h后用流式细胞仪检测细胞表面Toll样受体（TLR）4的表达。预先用SB203580或U0126与单核细胞共孵育1h，然后加入NTHi（感染复数为200），分别在4h、16h后收集上清，用酶联免疫吸附法检测肿瘤坏死因子α（TNF-α）的水平。采用SPSS11．5统计软件，组间比较用t检验，单核细胞TNF-俚的表达用单因素方差分析，组间比较用LSD检验。结果NTHi可迅速诱导p38、p44／42 MAPK通路的磷酸化，并至少持续到刺激后4h。与培养基组比较，NTHi刺激16h后单核细胞表面TLR4的表达明显增加（11．8±1．6，4．8±0．6），差异具有统计学意义（t=4．08，P〈0．05）。NTHi刺激4h和16h后上清液中的TNF-α（16．4±5．3，30．2±10．7）较培养基组（0．6±0．6，1．4±1．1）显著增加，差异具有统计学意义（4h时I-J值为15．78，16h时I-J值为28．82，P均〈0．01）。与细菌组比较，SB203580干预组单核细胞TNF-α水平显著降低（4h时I—J值为11．26，16h时I—J值为21．32，P均〈0．05），而U0126干预组TNF-α水平无明显变化（4h时I-J值为6．32，16h时I-J值为12．57，P均〉0．05）。结论 TLR4可能参与了NTHi诱导的单核细胞反应，p38 MAPK是该反应的关键信号分子。

关键词：嗜血菌流感 p38丝裂原活化蛋白激酶类 Toll样受体单核细胞

同方期刊数据库

Experimental Study of Microalgae Cultivation under Selective Illumination by Ag/CoSO_(4)for Bioelectrode Materials Preparation

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2023年第6期11卷 2849-2864页

作者： Kai Zhu hao Chen Shuang Wang Chuan Yuan Bin Cao Jun Ni Lujiang xu Anqing Zheng Arman Amani Babadi School of Energy and Power Engineering Jiangsu UniversityZhenjiang212013China School of Agricultural Engineering Jiangsu UniversityZhenjiang212013China Research Center of Fluid Machinery Engineering and Technology Jiangsu UniversityZhenjiang212013China Biomass Group College of EngineeringNanjing Agricultural UniversityNanjing210031China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhouChina

Microalgae biomass is an ideal precursor to prepare renewable carbon materials,which has broad *** bioaccumulation efficiency(lipids,proteins,carbohydrates)and biomass productivity of microalgae are influenced by spectroscopy during the culture *** this study,a bilayer plate-type photobioreactor was designed to cultivate Chlorella protothecoides with spectral selectivity by *** to culture without spectral selectivity,the spectral selectivity of Ag/CoSO_(4)nanofluids increased microalgae biomass by 5.76%,and the spectral selectivity of CoSO_(4)solution increased by 17.14%.In addition,the spectral selectivity of Ag/CoSO_(4)nanofluids was more conducive to the accumulation of nutrients(29.46%lipids,50.66%proteins,and 17.86%carbohydrates)in *** cultured chlorella was utilized to prepare bioelectrode materials,it was found that algal based biochar had a good pore structure(micro specific surface area:1627.5314 m^(2)/g,average pore size:0.21294 nm).As the current density was 1 A/g,the specific capacitance reached 230 F/g,appearing good electrochemical performance.

关键词： Bioelectrode materials Ag/CoSO_(4)nanofluids spectral selectivity microalgae cultivation pore structure

多主体参与和产品创新绩效：知识共创的复合中介机制

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

科学学与科学技术管理 2020年第7期41卷 22-37页

作者：蒋海萍许皓叶岚安徽大学商学院安徽大学外语学院

在开放式创新背景下,从知识共创视角,探索多主体参与对产品创新绩效的影响是实践发展和理论演进的必然结果。将多主体参与、知识共创分别划分为参与主体数、参与总人数,以及嵌入型知识共创、联盟型知识共创的具体维度,从而基于维度层面... 详细信息

在开放式创新背景下,从知识共创视角,探索多主体参与对产品创新绩效的影响是实践发展和理论演进的必然结果。将多主体参与、知识共创分别划分为参与主体数、参与总人数,以及嵌入型知识共创、联盟型知识共创的具体维度,从而基于维度层面,构建出多主体参与通过知识共创的单一中介效应和连续中介效应影响产品创新绩效的复合中介机制。以高新技术企业为调查对象的实证结果显示,参与主体数、参与总人数对产品创新绩效具有直接的正向影响;嵌入型知识共创、联盟型知识共创在多主体参与影响产品创新绩效关系中的单一中介效应、连续中介效应均显著。

关键词：多主体参与知识共创产品创新绩效机制

全双工终端的收发I/Q不平衡估计与补偿算法

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

通信学报 2017年第1期38卷 141-148页

作者：吴皓威赵俊波徐浩然欧静兰重庆大学通信与测控中心重庆400044 重庆大学通信工程学院重庆400044

针对直接变换收发结构的全双工通信终端中存在的I/Q不平衡问题,提出基于直接自干扰信号的收发I/Q不平衡参数估计与补偿算法。该算法无需外接标准的发射机或接收机进行参数估计,利用全双工结构中发射端泄露到接收端的直接自干扰信号,进... 详细信息

针对直接变换收发结构的全双工通信终端中存在的I/Q不平衡问题,提出基于直接自干扰信号的收发I/Q不平衡参数估计与补偿算法。该算法无需外接标准的发射机或接收机进行参数估计,利用全双工结构中发射端泄露到接收端的直接自干扰信号,进行估计与分离,可分别获得收发I/Q不平衡参数,再进行发射前的预补偿和接收后的校正,使从外部来看该全双工终端的I/Q支路是平衡的,无需对其进行参数估计,从而降低整个系统信号处理的复杂度。仿真结果表明,所提算法不仅能够有效估计全双工终端的I/Q不平衡参数,还能对终端的收发I/Q不平衡分别进行补偿,从而提升系统整体性能。

关键词：全双工自干扰信号 I/Q不平衡估计补偿

在线全文

学校读者我要写书评

暂无评论

基于紫外脉冲的污秽绝缘子电晕放电监测系统

高电压技术 2009年第4期35卷 844-848页

作者：姚树友熊兰王皓宇徐郁重庆大学输配电装备及系统安全与新技术国家重点实验室重庆400044 重庆电力公司重庆402260

为了预防污闪,电力部门制定了定期清洗绝缘子的计划,但定期清洗需耗费大量的人力物力。实现绝缘子的实时状态监测,提高绝缘子污秽闪络的预警能力,使输电线路由计划清洗向状态清洗转变,是目前输电线路安全运行需迫切解决的问题。基于此... 详细信息

为了预防污闪,电力部门制定了定期清洗绝缘子的计划,但定期清洗需耗费大量的人力物力。实现绝缘子的实时状态监测,提高绝缘子污秽闪络的预警能力,使输电线路由计划清洗向状态清洗转变,是目前输电线路安全运行需迫切解决的问题。基于此提出了利用特定的传感器检测污秽绝缘子电晕放电时发出紫外光的方法,研制了绝缘子污秽紫外检测仪,并利用短消息系统(SMS)平台构建了一个4对1的星型网络,实现了一种新型的污秽绝缘子的在线远程监测系统。该装置已经在壁山供电局110kV线路投入使用,通过对现场数据进行初步分析,得出当温湿度较高且脉冲数集中在4000左右时绝缘子污秽等级较为严重,需要清洗。试验结果证明,该系统具有成本低、灵敏度高、响应速度快和提前预测等优点。

关键词：紫外脉冲 LabVIEW 污秽绝缘子电晕放电在线检测短消息系统

Association of tumor morphology with long-term prognosis after liver resection for patients with a solitary huge hepatocellular carcinoma-a multicenter propensity score matching analysis

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2023年第3期12卷 314-327,I0006,I0007页

作者： Xin-Fei xu Han Wu Ju-Dong Li lan-Qing Yao Bin Huang Yong-Kang Diao Ting-hao Chen Wei-Min Gu Zhong Chen Jie Li Yao-Ming Zhang Hong Wang Ying-Jian Liang Ya-hao Zhou Chao Li Ming-Da Wang Cheng-Wu Zhang Timothy MPawlik Wan Yee Lau Feng Shen Tian Yang Department of Hepatobiliary Surgery Eastern Hepatobiliary Surgery HospitalNaval Medical University(Second Military Medical University)ShanghaiChina Department of General Surgery Changzheng HospitalNaval Medical University(Second Military Medical University)ShanghaiChina Department of Radiology Eastern Hepatobiliary Surgery HospitalNaval Medical University(Second Military Medical University)ShanghaiChina Division of Hepatobiliary and Pancreatic Surgery Department of General SurgeryCancer CenterZhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhouChina Department of General Surgery Ziyang First People’s HospitalZiyangChina The First Department of General Surgery the Fourth Hospital of HarbinHarbinChina Department of Hepatobiliary Surgery Affiliated Hospital of Nantong UniversityNantongChina Department of Hepatobiliary Surgery Fuyang People’s HospitalFuyangChina The Second Department of Hepatobiliary Surgery Meizhou People’s HospitalMeizhouChina Department of General Surgery Liuyang People’s HospitalChangshaChina Department of Hepatobiliary Surgery the First Affiliated Hospital of Harbin Medical UniversityHarbinChina Department of Hepatobiliary Surgery Pu’er People’s HospitalPu’erChina Department of Surgery Ohio State UniversityWexner Medical CenterColumbusOHUSA Faculty of Medicine the Chinese University of Hong KongHong KongChina

Background:A solitary hepatocellular carcinoma(HCC)without macrovascular invasion and distant metastasis,regardless of tumor size,is currently classified as early-stage disease by the latest Barcelona Clinic Liver Cancer(BCLC)staging *** the preferred treatment is surgical resection,the association of tumor morphology with long-term survival outcomes after liver resection for a solitary huge HCC of≥10 cm has not been ***:Patients who underwent curative liver resection for a solitary huge HCC were identified from a multicenter *** imaging findings were used to define spherical-or ellipsoidal-shaped lesions with smooth edges as balloon-shaped HCCs(BS-HCCs);out-of-shape lesions or lesions of any shape with matt edges were defined as non-balloon-shaped HCCs(NBS-HCCs).The two groups of patients with BS-HCCs and NBS-HCCs were matched in a 1:1 ratio using propensity score matching(PSM).Clinicopathologic characteristics,long-term overall survival(OS)and recurrence-free survival(RFS)were ***:Among patients with a solitary huge HCC,74 pairs of patients with BS-HCC and NBS-HCC were *** pathological features including proportions of microvascular invasion,satellite nodules,and incomplete tumor encapsulation in the BS-HCC group were lower than the NBS-HCC *** a median follow-up of 50.7 months,median OS and RFS of all patients with a solitary huge HCC after PSM were 27.8 and 10.1 months,*** BS-HCC group had better median OS and RFS than the NBS-HCC group(31.9 vs.21.0 months,P=0.01;and 19.7 vs.6.4 months,P=0.015).Multivariate analyses identified BS-HCC as independently associated with better OS(HR=0.592,P=0.009)and RFS(HR=0.633,P=0.013).Conclusions:For a solitary huge HCC,preoperative imaging on tumor morphology was associated with prognosis following *** particular,patients with BS-HCCs had better long-term survival following liver resection versus patients with large NBS-HCCs.

关键词： Hepatocellular carcinoma(HCC) survival recurrence tumor morphology hepatectomy

Advance in Research on Anti-tumor Pharmacological Mechanism of Cryptotanshinone

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

Medicinal Plant 2018年第6期9卷 11-14页

作者： Jiaru WANG Lingqi MENG Yi ZHANG hao WANG Wanting xu Yang LIU Yu ZHANG Tong ZHANG Shinong WANG yuqing ZHAI Yinghua LUO Chenghao JIN College of Life Science & Technology Heilongjiang Bayi Agricultural University

Cryptotanshinone is a natural active ingredient extracted from traditional Chinese medicine Radix Salviae *** has a variety of pharmacological effects,in addition to preventing and treating ischemic diseases,coronary artery disease Alzheimer's disease and fighting *** anti-tumor effects are exerted through inhibiting tumor cell proliferation,inducing tumor cell apoptosis,inhibiting tumor metastasis and invasion,inhibiting angiogenesis and regulating reactive oxygen species *** studies on the anti-tumor activity and action mechanism of cryptotanshinone in recent years are reviewed in this article.

关键词： Cryptotanshinone Anti-tumor Cell proliferation Apoptosis