检索结果-南通市图书馆

Minimum-Modified Debye-Hückel Theory for Size-Asymmetric Electrolyte Solutions with Moderate Concentrations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2023年第5期36卷 553-560,I0001,I0002页

作者： Tiejun Xiao yun zhou Guizhou Provincial Key Laboratory of Computational Nano-Material Science Guizhou Synergetic Innovation Center of Scientific Big Data for Advanced Manufacturing TechnologyGuizhou Education UniversityGuiyang 550018China

A minimum-modified Debye-Hückel(DH)theory for electrolytes with size asymmetry is ***-pared with the conventional DH theory,the minimum-modified DH theory only introduces an extra surface charge density to capture the electrostatic effect of the size asymmetry of the electrolytes and hence facilitates a boundary element method for electrostatic potential *** theory can distinguish the electrostat-ic energies and excess chemical potentials of ions with the same sizes but opposite charges,and is applied to a binary primitive electrolyte solution with moderate electrostatic *** with the hyper-netted chain theory,the validity of this modified DH theory demonstrates significant improvement over the conventional DH theory.

关键词： Electrolyte solution Size-asymmetry Debye-Hückel theory Electrostatic ener-gy Chemical potential

Convergence Theorems for λ-strict Pseudo-contractions in q-uniformly Smooth Banach Spaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2010年第4期26卷 743-758页

作者： Hai yun zhou College of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016 P. R. China Department of Mathematics Shijiazhuang Mechanical Engineering College Shijiazhuang 050003 P. R. China

In this paper, we continue to discuss the properties of iterates generated by a strict pseudo- contraction or a finite family of strict pseudo-contractions in a real q-uniformly smooth Banach space. The results presented in this paper are interesting extensions and improvements upon those known ones of Marino and Xu [Marino, G., Xu, H. K.： Weak and strong convergence theorems for strict pseudo-contractions in Hilbert spaces. J. Math. Anal. Appl., 324, 336-349 （2007）]. In order to get a strong convergence theorem, we modify the normal Mann＇s iterative algorithm by using a suitable convex combination of a fixed vector and a sequence in C. This result extends a recent result of Kim and Xu [Kim, T. H., Xu, H. K.： Strong convergence of modified Mann iterations. Nonl. Anal., 61, 51- 60 （2005）] both from nonexpansive mappings to λ-strict pseudo-contractions and from Hilbert spaces to q-uniformly smooth Banach spaces.

关键词： convergence theorem λ-strict pseudo-contraction the normal Mann iteration the Ishika- wa-like iteration q-uniformly smooth Banach spaces

Weak Convergence Theorems for Strict Pseudo-contractions in Banach Spaces

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2014年第5期30卷 755-766页

作者： Hai yun zhou Department of Mathematics Shijiazhuang Mechanical Engineering College

In this paper, it is shown that there is a gap in the paper [Chidume, C. E., Shahzad, N.： Weak convergence theorems for a finite family of strict pseudo-contractions. Nonlinear Anal., 72, 1257–1265（2010）], consequently, the main results of the paper do not hold in uniformly smooth Banach spaces. Meanwhile, it is also shown that the main results（Lemma 3.4, Theorems 3.5–3.6, 3.8–3.9） in the paper [Cholamjiak, P., Suantai, S.： Weak convergence theorems for a countable family of strict pseudo-contractions in Banach spaces. Fixed Point Theory Appl., 2010, Article ID 632137, 16 pages（2010）] do not hold in Lpfor p 〉 3. Finally, some modified results are presented in the setting of uniformly smooth and uniformly convex Banach spaces which include Lpfor p ≥ 2 as special cases. Furthermore, our arguments are also different from the ones given by the authors above.

关键词： Fr′echet differentiable Banach spaces Reich's inequality a countable family of λ-strict pseudo-contractions normal Mann iteration algorithm weak convergence theorems

线粒体分裂抑制剂Mdivi-1对星形胶质细胞NLRP3炎症小体及A1活化的影响

在线全文

学校读者我要写书评

暂无评论

中国药理学通报 2025年第1期41卷 43-49页

作者：刘书芬陈旭青张亚运姚敏周龙云上海中医药大学附属龙华医院上海200032 南京中医药大学附属医院江苏南京210029 扬州大学附属医院江苏扬州225000 南京医科大学第一附属医院江苏南京210029

目的观察线粒体分裂抑制剂1(Mdivi-1)对星形胶质细胞A1型活化及其相关信号分子的影响。方法根据CCK-8法筛选浓度,将CTX-TNA2星形胶质细胞分为对照组、ACM组、Mdivi-1低、中、高剂量组。ACM为含预设浓度IL-1α、TNF-α及补体C1q的DMEM高... 详细信息

目的观察线粒体分裂抑制剂1(Mdivi-1)对星形胶质细胞A1型活化及其相关信号分子的影响。方法根据CCK-8法筛选浓度,将CTX-TNA2星形胶质细胞分为对照组、ACM组、Mdivi-1低、中、高剂量组。ACM为含预设浓度IL-1α、TNF-α及补体C1q的DMEM高糖培养基。ACM组以ACM刺激24 h,诱导A1型活化。Mdivi-1组分别以相应浓度Mdivi-1预处理2 h,而后以ACM刺激24 h。采用实时荧光定量PCR及免疫印迹检测各组细胞A1型活化相关指标IL-1β、C3及iNOSmRNA水平与蛋白表达;联合免疫荧光及免疫印迹测定各组细胞NLRP3、caspase-1、凋亡相关斑点样蛋白ASC等信号分子表达;以二氢乙锭染色流式细胞分析检测各组干预后细胞ROS水平。结果CCK-8结果示,5、10、25μmol·L^(-1)为Mdivi-1干预CTX-TNA2细胞的适宜浓度。实时荧光定量PCR及免疫印迹结果表明,与对照组比较,ACM组IL^(-1)β、C3及iNOS mRNA水平与蛋白表达均明显升高,差异有统计学意义(P<0.05);与ACM组比较,10、25μmol·L^(-1) Mdivi-1组上述指标基因及蛋白表达水平均有所降低,差异有统计学意义(P<0.05)。免疫荧光及免疫印迹结果均证实,ACM刺激下,星形胶质细胞NLRP3炎症小体明显激活;而Mdivi-1干预则能有效逆转ACM刺激下NLRP3、caspase-1、ASC等表达的升高。DHE染色结果表明,5、10、25μmol·L^(-1) Mdivi-1干预均能一定程度上逆转ACM刺激下细胞ROS水平的升高,且该效应与药物剂量呈正相关。结论线粒体分裂抑制剂Mdivi-1可有效抑制星形胶质细胞A1型活化,该效应可能与其对ROS及NLRP3炎症小体的调节作用相关。

关键词：线粒体分裂抑制剂 Mdivi-1 星形胶质细胞 A1 活性氧 NLRP3炎症小体

Multi-time Collaborative Restoration for Integrated Electrical-gas Distribution Systems Based on Rolling Optimization

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2024年第2期10卷 660-671页

作者： Jingyang yun Zheng Yan yun zhou Peichao Zhang Weidong Hu Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education Department of Electrical EngineeringShanghai Jiao Tong University

This paper proposes a multi-time collaborative restoration model for integrated electricity-gas distribution sys-tems(IEGDSs)considering multiple resources after extreme weather *** on the linearized power flow constraints of the unbalanced electrical distribution system(EDS)and gas distribution system(GDS),this problem can be formulated as a mixed-integer linear programming(MILP)*** improve the efficiency and veracity of the solution,a rolling optimiza-tion based two-stage method is developed with the first stage solved by a linear approximation model,and the second stage solved by real-time updated rolling *** solving the MILP problem using rolling optimization,the proposed model and solution method achieve efficient and reliable collaborative restoration of IEGDS considering multiple resources and unbal-anced operation characteristics of *** effectiveness of the proposed model and method is validated by using an IEGDS made of a 37-bus unbalanced EDS and 11-node *** Terms-Electricity-gas system,mix-integer linear programming,power system restoration.

关键词： Electricity-gas system mix-integer linear programming power system restoration

Castleman disease and TAFRO syndrome:To improve the diagnostic consciousness is the key

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第5期10卷 1536-1547页

作者： Qian-yun zhou Department of Critical Care Medicine Peking University Shougang HospitalBeijing 100144China

BACKGROUND Castleman disease(CD)and TAFRO syndrome are very rare in clinical *** clinicians,especially non-hematological clinicians,do not know enough about the two diseases,so it often leads to misdiagnosis or missed *** To explore the clinical features and diagnosis of CD and TAFRO *** We retrospectively collected the clinical and laboratory data of 39 patients who were diagnosed with CD from a single medical *** Clinical classification identified 18 patients(46.15%)with unicentric Castleman disease(UCD)and 21 patients(53.85%)with multicentric Castleman disease(MCD),the latter is further divided into 13 patients(33.33%)with idiopathic multicentric Castleman disease-not otherwise specified(iMCD-NOS)and 8 patients(20.51%)with TAFRO *** and iMCD are significantly different in clinical manifestations,treatment,and ***,a few patients with MCD were diagnosed as UCD in their early *** was a correlation between two of Thrombocytopenia,anasarca and elevated creatinine,which were important components of TAFRO *** UCD group,the pathologies of lymph modes were mostly hyaline vascular type(13/18,72.22%),however plasma cell type or mixed type could also *** iMCD-NOS group and TAFRO syndrome group,the pathologies of lymph mode shown polarity of plasma cell type and hyaline vascular type *** with patients with TAFRO syndrome,patients with iMCD-NOS were diagnosed more *** The clinical and pathological types of CD are not completely separate,there is an intermediate situation or mixed characteristics between two ends of clinical and pathological *** clinical manifestations of patients with CD are determined by their pathological *** syndrome is a special subtype of iMCD with unique clinical manifestations.

关键词： Castleman disease Diagnosis Lymph node biopsy TAFRO syndrome

Fabrication and magnetic properties of NiFe-ZnO nano-granular films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2013年第3期32卷 269-272页

作者： Xue-yun zhou Dong-Sheng Yao Faculty of Science Jiujiang University Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology Tianjin University

Excellent soft magnetic and high frequency prop- erties were obtained successfully in the （Ni75Fe25）x（ZnO）1-x granular films fabricated on the glass substrate by RF magnetron oblique sputtering. The microstructure, mag- netic and high frequency properties were investigated systematically. High resolution transmission electron micrographs show that the film consists of fcc Ni75Fe25 particles uniformly embedded in an amorphous insulating matrix ZnO with particle size a few nanometers. The （Ni75Fe25）x（ZnO）1-x films exhibit excellent soft magnetic properties in a widex range from 0.50 to 0.80 with coer- civity not exceeding 5 × 10^-4 T, which is ascribed to the exchange coupling between magnetic particles. Especially for the sample with x = 0.64, coercivities in hard and easy axes are 5.0 ×10^-5 and 3.6 × 10^-4 T, respectively, and the electric resistivity ρ reaches 1,790 μΩ.cm. The dependence of complex permeability u = u′- ju″on frequency f shows that the real part u′ is more than 130 below 500 MHz, and the ferromagnetic resonance fre- quency fr reaches 1.32 GHz, implying the promising for high frequency application.

关键词： Soft magnetic property Nano-granular thinfilms High frequency application

Field measurements for calibration of simplified models of the stiffening effect of infill masonry walls in high-rise RC framed and shear-wall buildings

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2020年第1期19卷 87-104页

作者： zhou yun Pei Yilin zhou Yi Hyeon-Jong Hwang Yi Weijian College of Civil Engineering Hunan UniversityChangsha 410082China Hunan Provincial Key Lab on Damage Diagnosis for Engineering Structures Hunan UniversityChangsha 410082China Key Laboratory for Green&Advanced Civil Engineering Materials and Application Technology of Hunan Province Hunan UniversityChangsha 410082China

As a type of nonstructural component, infill walls play a significant role in the seismic behavior of high-rise buildings. However, the stiffness of the infill wall is generally either ignored or considered by simplified empirical criteria that lead to a period shortening. The difference can be greatly decreased by using a structural identification methodology. In this study, an ambient vibration test was performed on four on-site reinforced concrete high-rise buildings, and the design results were compared with the PKPM models using corresponding finite element(FE) models. A diagonal strut model was used to simulate the behavior of the infill wall, and the identified modal parameters measured from the on-site test were employed to calibrate the parameters of the diagonal strut in the FE models. The SAP2000 models with calibrated elastic modulus were used to evaluate the seismic response in the elastic state. Based on the load-displacement relationship of the infill wall, nonlinear dynamic analysis models were built in PERFORM-3 D and calibrated using the measured modal periods. The analysis results revealed that the structural performance under small/large earthquake records were both strengthened by infill walls, and the contribution of infill walls should be considered for better accuracy in the design process.

关键词： high-rise building ambient vibration test model calibration infi ll wall seismic performance nonlinear dynamic analysis

The Anhydride-Amic Acid-Imide Forms of Maleinized Soybean Oil

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2023年第12期41卷 1829-1835,I0005页

作者： yun zhou Yan-Bin Huang Wan-Tai Yang Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

Vegetable oil is one of the most promising renewable feedstocks as an alternative to fossil resources,but there are few studies aiming to transform it into hydrophilic *** proposed a facile method to prepare water-soluble derivatives from soybean oil,which could become water resistant again after simple heat *** model vegetable oil,soybean oil(SO),was first reacted with maleic anhydride(MA)by the Alder ene reaction to obtain maleinized soybean oil(SOMA),and SOMA was further reacted with gaseous ammonia to obtain the maleamic acid form(SOMA-Amic acid),which was very soluble in water(solubility>100 mg/mL).The obtained water-soluble product was converted to the water-resistant maleimide form(SOMA-Imide)by a simple heat *** potential application of these vegetable oil derived materials was demonstrated in paper sizing as an ***-Amic acid was demonstrated to be a novel green material,which can be used in an aqueous process and then heat-treated to become water-resistant in the final product.

关键词： Soybean oil Anhydride-amic acid-imide forms Maleinization