检索结果-南通市图书馆

An Antimony Oxide pH Electrode for Tissue Culture Medium

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2006年第A03期35卷 261-263页

作者： Yang Ha min wang Department of Chemistry Zhejiang University Hangzhou 310028 China

A new approach named“caterpillar melt method”was developed to prepare wire type antimony oxide electrode for pH measurement in agar medium for tissue culture.A micro antimony wire was prepared from melt of the metal with the help of a glass capillary and the surface of the wire was oxidized in nitrate melt to obtain an antimony oxide electrode. Characterization results showed that the oxide layer is dense and uniform,with high physical and chemical *** electrode has a fast and stable response toward pH change for aqueous *** potential of the antimony electrode has a linear relationship with the pH of the solution (R^2=1.00) with a sensitivity of 54.1mV/*** electrode works well and is more stable in agar medium during tissue culture for pH monitoring.

关键词： pH measurement antimony oxide pH electrode tissue culture media

A wavelet approach for active-passive vibration control of laminated plates

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2012年第2期28卷 520-531页

作者： Ji-Zeng wang Xiao-min wang You-He Zhou Key Laboratory of Mechanics on Disaster and Environment in Western China the Ministry of Education of Chinaand Department of Mechanics and Engineering SciencesSchool of Civil Engineering and MechanicsLanzhou University730000 LanzhouChina

As an extension of the wavelet approach to vi- bration control of piezoelectric beam-type plates developed earlier by the authors, this paper proposes a hybrid active- passive control strategy for suppressing vibrations of lami- nated rectangular plates bonded with distributed piezoelec- tric sensors and actuators via thin viscoelastic bonding lay- ers. Owing to the low-pass filtering property of scaling func- tion transform in orthogonal wavelet theory, this wavelet- based control method has the ability to automatically filter out noise-like signal in the feedback control loop, hence re- ducing the risk of residual coupling effects which are usu- ally the source of spillover instability. Moreover, the exis- tence of thin viscoelastic bonding layers can further improve robustness and reliability of the system through dissipating the energy of any other possible noise induced partially by numerical errors during the control process. A simulation procedure based on an advanced wavelet-Galerkin technique is suggested to realize the hybrid active-passive control pro- cess. Numerical results demonstrate the efficiency of the pro- posed approach.

关键词： Wavelets Piezoelectric structures Hybridactive-passive control Rectangular plate Viscoelastic ma-terial ~ Numerical simulation

Phase transition of Ni_(55-x)Co_(x)Mn_(20)Ga_(25)(8.5≤x≤11.0)alloys with different compositions and magnetic fields

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第2期42卷 572-578页

作者： Xiao wang Jing-min wang Hui Hua Cheng-Bao Jiang Key Laboratory of Aerospace Materials and Performance(ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing100191China

Studies on Co-doped Ni–Mn–Ga ferromagnetic shape memory alloys(FSMAs)have been quite active topics in recent *** previous reports where the amount of Co doping was generally less than 8 at%,in this work Ni_(55-x)Co_(x)Mn_(20)Ga_(25)(8.5≤x≤11.0)alloys were studied with high Co *** effects of both composition and magnetic field on phase transitions were *** the increase in substitution of Co for Ni,the magnetic transition temperatures increase gradually but the martensitic transformation temperature decreases quite *** particular,the average decrease in the martensitic transformation temperatures is up to 100 K which is nearly twice that in the case of Co content of less than 8 at%.Further,under an applied magnetic field ranging from 0.03 to 0.60 T,abnormal stabilization of a martensite phase with lower magnetization was *** entropy change of 1.6 J·kg^(−1)·K^(−1)was induced at the martensitic transformation of Ni46.5Co8.5Mn20Ga25 alloy by an applied field of 1 *** magnetic contributions,including the magnetocrystalline anisotropy and the Zeeman energy,to the thermodynamics of the martensitic transformation are considered to understand the observed unusual *** work results in new insights into the understanding of Co-doped Ni–Mn-based ferromagnetic shape memory alloys.

关键词： Ni-Mn-Ga Ferromagnetic shape memory alloys Martensitic transformation Magnetic properties Magnetocaloric effect

Fault Diagnosis for Service Composition by Spiking Neural P Systems with Colored Spikes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2019年第5期28卷 1033-1040页

作者： PANG Shanchen wang min QIAO Sibo wang Xun CHEN Hongqi College of Computer and Communication Engineering China University of Petroleum

A variety of web services have emerged with the rapid development of the Internet. These services are often of a single function. The value-added services can be achieved by combing with multiple *** processing speed and stability of existing methods in service composition were not very well and seldom consider the fault diagnosis and handling methods for the service, which results in a greater probability of the service composition failure at run time. We use spiking neural P systems with colored spikes to model the fault of available service, component, and connector in the service composition. The proposed model can be used to locate a fault and handle it correctly when the service combination fails, the advantage of efficiency and stability of proposed method has been proved by comparing with the method of Petri net.

关键词： Spiking neural P system with colored spikes Service composition Fault handling

Simulation and Prediction of Alkalinity in Sintering Process Based on Grey Least Squares Support Vector Machine

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2009年第5期16卷 1-6页

作者： SONG Qiang wang Ai-min Mechanical Engineering Department Anyang Institute of Technology Anyang 455000 Henan China Computer and Information Engineering College Anyang Normal University Anyang 455000 Henan China

The prediction of the alkalinity is difficult during the sintering process. Whether or not the level of the alkalinity of sintering process is successful is directly related to the quality of sinter. There is no very good method for predicting the alkalinity by now owing to the high complexity, high nonlinearity, strong coupling, high time delay, and etc. Therefore, a new technique, the grey squares support machine, was introduced. The grey support vector machine model of the alkalinity enabled the development of new equation and algorithm to predict the alkalinity. During modelling, the fluctuation of data sequence was weakened by the grey theory and the support vector machine was capable of processing nonlinear adaptable information, and the grey support vector machine has a combination of those advantages. The results revealed that the alkalinity of sinter could be accurately predicted using this model by reference to small sample and information. The experimental results showed that the grey support vector machine model was effective and practical owing to the advantages of high precision, less samples required, and simple calculation.

关键词： alkalinity sinter grey least squares support vector machine prediction sintering process grey model

Stable Recovery of Low Rank Matrices From Nuclear Norm minimization

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2015年第1期31卷 247-260页

作者： Hui-min wang Song LI Department of Mathematics Shaoxing University Department of Mathematics Zhejiang University

Low rank matrix recovery is a new topic drawing the attention of many researchers which addresses the problem of recovering an unknown low rank matrix from few linear measurements. The matrix Dantzig selector and the matrix Lasso are two important algorithms based on nuclear norm minimization. In this paper, we first prove some decay properties of restricted isometry constants, then we discuss the recovery errors of these two algorithms and give a new bound of restricted isometry constant to guarantee stable recovery, which improves the results of [11].

关键词： restricted isometry constants nuclear norm minimization low rank matrices

CFM-UNet:A Joint CNN and Transformer Network via Cross Feature Modulation for Remote Sensing Images Segmentation

在线全文

学校读者我要写书评

暂无评论

Journal of Geodesy and Geoinformation Science 2023年第4期6卷 40-47页

作者： min wang Peidong wang School of Urban Construction Engineering Guangzhou City PolytechnicGuangzhou 510800China Guangdong Mechanical&Electrical Polytechnic Guangzhou 510515China

The semantic segmentation methods based on CNN have made great progress,but there are still some shortcomings in the application of remote sensing images segmentation,such as the small receptive field can not effectively capture global *** order to solve this problem,this paper proposes a hybrid model based on ResNet50 and swin transformer to directly capture long-range dependence,which fuses features through Cross Feature Modulation Module(CFMM).Experimental results on two publicly available datasets,Vaihingen and Potsdam,are mIoU of 70.27%and 76.63%,***,CFM-UNet can maintain a high segmentation performance compared with other competitive networks.

关键词： remote sensing images semantic segmentation swin transformer feature modulation module

A New 1D Iodoargentate Chain Based on Heptameric Ag7I13 Building Units Templated by Transition-metalcomplex Cation: Structure, Fluorescence and Visible Light Responding Photocatalytic Property

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2019年第8期38卷 1320-1328页

作者： wang min ZHAO Hua School of Science Beijing Technology and Business UniversityBeijing 100048China

Using transition-metal-complex cation as the structure-directing agent, a novel one-dimensional(1D) iodoargentate-based hybrid, namely, {[Co(2,2’-bipy)3]2(Ag7I11)·3H2O}n(1) has been synthesized and structurally characterized. The interesting 1D(Ag7I11)n4n- chain of 1 is constructed from a heptameric Ag7I13 secondary building unit, in which abundant argentophilic interactions can be observed. Intermolecular C–H···π among [Co(2,2’-bipy)3]2+ cations and C–H···I interactions between [Co(2,2’-bipy)3]2+ cations and(Ag7I11)n4n- chains contribute to the formation of a 3D network. The optical gap(2.58 eV) based on UV-Vis diffuse-reflectance measurement suggests the semiconductor nature of 1, which implies an efficient photocatalytic degradation activity on organic pollutants under visible light irradiation. As expected, 1 exhibits photocatalytic activity for the degradation of rhodamine B. The luminescence property was also studied.

关键词： organic-inorganic hybrid iodoargentate photocatalytic degradation

Optimum Detecting Arrays for Independent Interaction Faults

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2016年第2期32卷 199-212页

作者： Ce SHI Cheng min wang School of Mathematics and Information Science Shanghai Lixin University of Commerce School of Science Jiangnan University

The use of detecting arrays （DTAs） is motivated by the need to locate and detect interaction faults arising between the factors in a component-based system in software testing. The optimality and construction of DTAs have been investigated in depth for the case in which all the interaction faults are assumed to have the same strength; however, as a practical concern, the strengths of these faults are not always identical. For real world applications, it would be desirable for a DTA to be able to identify and detect faulty interactions of a strength equal to or less than a specified value under the assumption that the faulty interactions are independent from one another. To the best of our knowledge, the optimality and construction of DTAs for independent interaction faults have not been studied systematically before, In this paper, we establish a general lower bound on the size of DTAs for independent interaction faults and explore the combinatorial feature that enable these DTAs to meet the lower bound. Taking advantage of this combinatorial characterization, several classes of optimum DTAs meeting the lower bound are presented.

关键词： Detecting arrays super-simple independent interaction faults optimum