检索结果-南通市图书馆

Cancer Biology & Medicine 2024年第2期21卷 132-138页

作者： Xiumei wang jun Chen Guangshuai Jia Department of Immunology and Microbiology Zhongshan School of MedicineSun Yat-sen UniversityGuangzhou 510080China Jinfeng Laboratory Chongqing 401329China GMU-GIBH Joint School of Life Sciences Guangzhou Medical UniversityGuangzhou 510182China

Macrophages are innate immune cells that are ubiquitously distributed throughout the vertebrate *** orchestrate sophisticated processes in development,homeostasis,immunity,and *** residing in tumor tissues are commonly known as tumor-associated macrophages(TAMs)and promote or inhibit tumor growth depending on the activation state2.

关键词： immunity homeostasis tumor

A novel small-signal equivalent circuit model for GaN HEMTs incorporating a dual-field-plate

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2024年第5期45卷 61-68页

作者： Jinye wang jun Liu Zhenxin Zhao School of Integrated Circuit Science and Engineering Hangzhou Dianzi UniversityHangzhou 310018China

An accurate and novel small-signal equivalent circuit model for GaN high-electron-mobility transistors(HEMTs)is proposed,which considers a dual-field-plate(FP)made up of a gate-FP and a *** equivalent circuit of the overall model is composed of parasitic elements,intrinsic transistors,gate-FP,and source-FP *** equivalent circuit of the gate-FP is identical to that of the intrinsic *** order to simplify the complexity of the model,a series combination of a resistor and a capacitor is employed to represent the *** analytical extraction procedure of the model parameters is presented based on the proposed equivalent *** verification is carried out on a 4×250μm GaN HEMT device with a gate-FP and a source-FP in a 0.45μm *** with the classic model,the proposed novel small-signal model shows closer agreement with measured S-parameters in the range of 1.0 to 18.0 GHz.

关键词： small-signal model dual field-plate(FP) GaN high-electron-mobility transistors(HEMT) parameter extraction

在线全文

学校读者我要写书评

暂无评论

堤防渗流场参数敏感性三维随机有限元分析

水利学报 2008年第3期39卷 272-279页

作者：王亚军张我华王沙义浙江大学软弱土与环境土工教育部重点实验室浙江杭州310027

采用随机有限元分析方法,研究了长江荆南干堤的三维各向异性非均质稳定随机渗流场中的随机参数和随机边界条件对渗流场模拟结果的影响,并进行敏感性分析。通过统计模拟和假设检验,建立并验证了该干堤渗流场内服从独立正态分布的渗透系... 详细信息

采用随机有限元分析方法,研究了长江荆南干堤的三维各向异性非均质稳定随机渗流场中的随机参数和随机边界条件对渗流场模拟结果的影响,并进行敏感性分析。通过统计模拟和假设检验,建立并验证了该干堤渗流场内服从独立正态分布的渗透系数张量;讨论了堤防土层的地质结构特性、堤防渗透变形及破坏的特征、堤防渗透参数的敏感性;研究了上、下游水头随机边界条件、垂直防渗边界条件以及减压(导渗)沟随机特性的敏感性。实现了对渗流场的全面随机模拟和分析,得到的结论通过统计检验,并根据实测工程数据对照证明是可靠的。

关键词：三维随机有限元非均质随机渗流场各向异性随机渗透系数随机边界条件随机敏感性分析

Small-signal Stability Constrained Optimal Power Flow Considering Eigenvalue Distribution

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1052-1062页

作者： Zheng Huang Kewen wang Yi wang Jing Han jun Liang the School of Electrical and Information Engineering Zhengzhou UniversityZhengzhou 450001China Cardiff University Cardiff CF243AAU.K.

In the existing small-signal stability constrained op-timal power flow(SSSC-OPF)algorithms,only the rightmost ei-genvalue or eigenvalues that do not satisfy a given threshold,e.g.,damping ratio threshold and real-part threshold of eigen-value,are considered in the small-signal stability *** effect of steady-state,i.e.,operating point,changes on eigen-values is not fully taken into *** this paper,the small-signal stability constraint that can fully reflect the eigenvalue change and system dynamic performance requirement is formed by analyzing the eigenvalue distribution on the complex *** small-signal stability constraint is embedded into the standard optimal power flow model for generation *** simultaneous solution formula of the SSSC-OPF is es-tablished and solved by the quasi-Newton approach,while pen-alty factors corresponding to the eigenvalue constraints are de-termined by the stabilization degree of constrained *** improve the computation speed,a hybrid algorithm for ei-genvalue computation in the optimization process is proposed,which includes variable selection for eigenvalue estimation and strategy selection for eigenvalue *** effectiveness of the proposed algorithm is tested and validated on the New England 10-machine 39-bus system and a modified practical 68-machine 2395-bus system.

关键词： Damping ratio eigenvalue optimal power flow quasi-Newton approach sensitivity small-signal stability

基于Nyberg-Rueppel签名体制的盲代理多重签名方案

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

通信学报 2007年第3期28卷 115-119页

作者：康莉蔡勉王亚军北京工业大学电子信息与控制工程学院北京100022

为了实现一个盲代理签名能够同时代表多个原始签名人签名,在对盲代理签名研究的基础上,首次提出了盲代理多重签名这一概念,该签名克服了一个盲代理签名只能代表一个原始签名人签名的局限性。此外,在Nyberg-Rueppel盲代理签名和代理多重... 详细信息

为了实现一个盲代理签名能够同时代表多个原始签名人签名,在对盲代理签名研究的基础上,首次提出了盲代理多重签名这一概念,该签名克服了一个盲代理签名只能代表一个原始签名人签名的局限性。此外,在Nyberg-Rueppel盲代理签名和代理多重签名2种体制研究的基础上,基于离散对数,分别提出了具有盲代理签名和代理多重签名双重性质的第一类盲代理多重签名方案和第二类盲代理多重签名方案,并对2方案的安全性进行了论证。

关键词：数据安全盲代理多重签名离散对数代理多重签名盲代理签名

Investigation of granite failure precursor under axial load using modified LSTM framework

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2024年第8期31卷 2930-2943页

作者： wang, ya-lei Xu, Jin-ming Department of Civil Engineering Shanghai University Shanghai China

Granite is usually composed of quartz, biotite, feldspar, and cracks, and the variation characteristics of these components could reflect the deformation and failure process of rock well. Taking granite as an example, the video camera was used to record the deformation and failure process of rock. The distribution of meso-components in video images was then identified. The meso-components of rock failure precursors were also discussed. Moreover, a modified LSTM (long short-term memory method) based on SSA (sparrow search algorithm) was proposed to estimate the change of meso-components of rock failure precursor. It shows that the initiation and expansion of cracks are mainly caused by feldspar and quartz fracture, and when the quartz and feldspar exit the stress framework, rock failure occurs; the second large increase of crack area and the second large decrease of quartz or feldspar area may be used as a precursor of rock failure; the precursor time of rock failure based on meso-scopic components is about 4 s earlier than that observed by the naked eye; the modified LSTM network has the strongest estimation ability for quartz area change, followed by feldspar and biotite, and has the worst estimation ability for cracks; when using the modified LSTM network to predict the precursors of rock instability and failure, quartz and feldspar could be given priority. The results presented herein may provide reference in the investigation of rock failure mechanism.

关键词： axial load failure precursor granite modified long short-term memory method

An ultra-porous g-C_(3)N_(4) micro-tube coupled with MXene(Ti_(3)C_(2)TX)nanosheets for efficient degradation of organics under natural sunlight

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 Environmental Sciences 2024年第3期137卷 258-270页

作者： Zongyang ya Qiyou wang Jingjin Cai Peng wang Xinyu Jiang Zhiyin Cai Shanglin Xiang Tingwei wang Dongyu Cai College of Materials Science&Engineering Nanjing Tech University30 South PuZhu RoadNanjing 211816China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University30 South PuZhu RoadNanjing 211816China

It remains as a challenge for realizing efficient photo-responsive catalysts towards largescale degradation of organic pollutants under natural *** work reports a new pore engineering strategy for creating ultra-porous g-C_(3)N_(4) micro-tubes with an unprecedentedly high specific surface area of 152.96 m^(2)/*** is mainly associated with releasing internal vapor pressure in the autoclave where the hydrothermal treatment of the urea/melamine mixture is *** by microscopic observation,porosity measurement and spectroscopic characterization,it is found that releasing the pressure at halfway of hydrothermal process is vital for forming exfoliated rod-like precursors and the de-aggregation of these rods presents substantial benefits on the production of mesopores on g-C_(3)N_(4) microtubes during the calcination of *** offers a large number of reactive sites required by photocatalytic *** these micro-tubes with Ti_(3)C_(2)T_(X) nanosheets via electrostatic interaction yields a 1D/2D heterojunction with a close interfacial *** addition of metallically conductive Ti_(3)C_(2)T_(X) nanosheets accelerates the separation between electrons and holes,and also enhances the light *** these merits of structural design lead to forming a group of highly efficient catalysts demonstrating an excellent photocatalytic degradation rate of k=0.0560 min^(-1)for RhB dyes under 100 mW/cm~2 visible light radiation that micks sunlight *** laboratory valuation is further supported by an outdoor test that shows a fast degradation rate of 0.0744 min^(-1)under natural sunlight.

关键词： Carbon nitride MXene Heterojunction Photocatalysis

Shuxuening Injection Inhibits Apoptosis and Reduces Myocardial Ischemia-Reperfusion Injury in Rats through PI3K/AKT Pathway

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2024年第5期30卷 421-432页

作者： YUE Tong-tong CAO Ying-jie CAO ya-xuan LI Wei-xia wang Xiao-yan SI Chun-ying XIA Han ZHU Ming-jun TANG Jin-fa wang He The First Clinical Medical College of Henan University of Chinese Medicine Zhengzhou 450046China Department of Pharmacy the First Affiliated Hospital of Henan University of Chinese MedicineZhengzhou 451200China Department of Cardiovascular Diseases the First Affiliated Hospital of Henan University of Chinese MedicineZhengzhou 451200China

Objective: To investigate the main components and potential mechanism of Shuxuening Injection(SXNI) in the treatment of myocardial ischemia-reperfusion injury(MIRI) through network pharmacology and in vivo research. Methods: The Traditional Chinese Medicine Systems Pharmacology(TCMSP) and Pharm Mapper databases were used to extract and evaluate the effective components of Ginkgo biloba leaves, the main component of SXNI. The Online Mendelian Inheritance in Man(OMIM) and Gene Cards databases were searched for disease targets and obtain the drug target and disease target intersections. The active ingredient-target network was built using Cytoscape 3.9.1 software. The STRING database, Metascape online platform, and R language were used to obtain the key targets and signaling pathways of the anti-MIRI effects of SXNI. In order to verify the therapeutic effect of different concentrations of SXNI on MIRI in rats, 60 rats were first divided into 5 groups according to random number table method: the sham operation group, the model group, SXNI low-dose(3.68 mg/kg), medium-dose(7.35 mg/kg), and high-dose(14.7 mg/kg) groups, with 12 rats in each group. Then, another 60 rats were randomly divided into 5 groups: the sham operation group, the model group, SXNI group(14.7 mg/kg), SXNI+LY294002 group,and LY294002 group, with 12 rats in each group. The drug was then administered intraperitoneally at body weight for 14 days. The main biological processes were validated using in vivo testing. Evans blue/triphenyltetrazolium chloride(TTC) double staining, hematoxylin-eosin(HE) staining, terminal deoxynucleotidyl transferase d UTP nick end labeling(TUNEL) assay, enzyme-linked immunosorbent assay(ELISA), and Western blot analysis were used to investigate the efficacy and mechanism of SXNI in MIRI rats. Results: Eleven core targets and 30 Kyoto Encyclopedia of Genes and Genomes(KEGG) pathways were selected. Among these, the phosphoinositide 3-kinase(PI3K)/protein kinase B(AKT) pathway was

关键词： myocardial ischemia reperfusion injury PI3K/AKT signaling pathway Shuxuening Injection apoptosis Ginkgo biloba leaves

在线全文

学校读者我要写书评

暂无评论

α-酮酯和α-酮酰胺的Henry反应

有机化学 2006年第9期26卷 1291-1294页

作者：王亚军沈宗旋张雅文苏州大学化学化工学院江苏省有机合成重点实验室苏州215006

用三乙胺催化环状α-酮酯和α-酮酰胺同硝基甲烷的Henry反应,首次合成了12个多官能团的β-硝基醇,它们的结构用元素分析、红外光谱和核磁共振进行了表征.这一反应速度较快,室温下进行,条件温和,产率较好,是合成多官能团硝基醇的有效方法.

关键词： Henry反应三乙胺 α-酮酯 α-酮酰胺 β-硝基醇

A New Industrial Intrusion Detection Method Based on CNN-BiLSTM

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第6期79卷 4297-4318页

作者： jun wang Changfu Si Zhen wang Qiang Fu College of Computer Science and Technology Shenyang University of Chemical TechnologyShenyang110142China

Nowadays,with the rapid development of industrial Internet technology,on the one hand,advanced industrial control systems(ICS)have improved industrial production ***,there are more and more cyber-attacks targeting industrial control *** ensure the security of industrial networks,intrusion detection systems have been widely used in industrial control systems,and deep neural networks have always been an effective method for identifying cyber *** intrusion detection methods still suffer from low accuracy and a high false alarm ***,it is important to build a more efficient intrusion detection *** paper proposes a hybrid deep learning intrusion detection method based on convolutional neural networks and bidirectional long short-term memory neural networks(CNN-BiLSTM).To address the issue of imbalanced data within the dataset and improve the model’s detection capabilities,the Synthetic Minority Over-sampling Technique-Edited Nearest Neighbors(SMOTE-ENN)algorithm is applied in the preprocessing *** algorithm is employed to generate synthetic instances for the minority class,simultaneously mitigating the impact of noise in the majority *** approach aims to create a more equitable distribution of classes,thereby enhancing the model’s ability to effectively identify patterns in both minority and majority *** the experimental phase,the detection performance of the method is verified using two data *** results show that the accuracy rate on the CICIDS-2017 data set reaches 97.7%.On the natural gas pipeline dataset collected by Lan Turnipseed from Mississippi State University in the United States,the accuracy rate also reaches 85.5%.

关键词： Intrusion detection convolutional neural network bidirectional long short-term memory neural network multi-head self-attention mechanism