检索结果-南通市图书馆

Journal of Materials Science & Technology 2012年第2期28卷 177-183页

作者： Ensieh Ganji Babakhani Jafar Towfighi Laleh Shirazi ali Nakhaeipour akbar Zamaniyan Zahra Shafiei Gas Department Research Institute of Petroleum Industry (RIPI) Chemical Engineering Department Engineering FacultyUniversity of Tarbiat Modares

Perovskite-type a0.5Sr0.5Co0.8Fe0.1R0.1O3-δ （R=Al, Mn, Fe, Ce, Cr, Ni, Co） oxide membranes were ex- ploited and synthesized. Oxygen behavior, order-disorder transition and phase stability of these composite oxides were investigated by combined analysis of X-ray diffraction （XRD）, temperature programmed desorp- tion （TPD）, thermogravimetric-differential thermal analysis （TG-DTA）. Oxygen permeation through these membranes was studied by the gas chromatography （GC） method using a high-temperature permeation cell in a wide temperature range from 700 to 950℃. High permeation fluxes were observed for these materials. The high permeation flux was about 3.19 ***-2 under air/He gradients at 950℃, which was achieved for a0.5Sr0.5Co0.8Fe0.1R0.1O3-δ（BSCFNiO） membrane. The results of analysis showed no phase transition for BSCFNiO oxide with increasing temperature and XRD pattern of this material after O2-TPD indicated to sustain a pure perovskite structure after oxygen permeation process.

关键词： Perovskite Ceramic membrane Oxygen separation Phase stability

Cell therapy for the treatment of reproductive diseases and infertility:an overview from the mechanism to the clinic alongside diagnostic methods

在线全文

学校读者我要写书评

暂无评论

Frontiers of Medicine 2022年第6期16卷 827-858页

作者： Kosar Babaei Mohsen Aziminezhad Seyedeh Elham Norollahi Sogand Vahidi ali akbar Samadani Non-Communicable Disease Research Center Neyshabur University of Medical SciencesNeyshaburIran UMR INSERM U 1122 IGE-PCVInteractions Gène-Environment En Physiopathologie Cardiovascular UniversitéDe LorraineNancyFrance Cancer Research Center and Department of Immunology Semnan University of Medical SciencesSemnanIran Medical Biology Research Center Kermanshah University of Medical SciencesKermanshahIran Guilan Road Trauma Research Center Guilan University of Medical SciencesRashtIran

Infertility is experienced by 8%–12%of adults in their reproductive period globally and has become a prevalent *** routine therapeutic methods,stem cells are rapidly being examined as viable alternative therapies in regenerative medicine and translational *** progress has been made in understanding the biology and purpose of stem *** affected pluripotent stem cells(iPSCs)and mesenchymal stem cells(MSCs)are further studied for their possible use in reproductive medicine,particularly for infertility induced by premature ovarian insufficiency and ***,this study discusses current developments in the use of some kinds of MSCs such as adipose-derived stem cells,bone marrow stromal cells,umbilical cord MSCs,and menstrual blood *** methods have been used to manage ovarian and uterine disorders,and each technique presents a novel method for the therapy of infertility.

关键词： infertility stem cell therapy mesenchymal stem cells pluripotent stem cells

Behavioral effects of a four-wing attractor with circuit realization: a cryptographic perspective on immersion

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第12期72卷 35-70页

作者： Najeeb Alam Khan Muhammad ali Qureshi Tooba Hameed Saeed akbar Saif Ullah Department of Mathematics University of KarachiKarachi 75270Pakistan Department of Physics University of KarachiKarachi 75270Pakistan Department of Mathematics Government College UniversityLahore 54000Pakistan

In this paper,we propose an innovative chaotic system,combining fractional derivative and sinehyperbolic nonlinearity with circuit *** study of this system is conducted via an analog circuit simulator,using two anti-parallel semiconductor diodes to provide hyperbolic sine nonlinearity,and to function as operational *** multi-stability of the system is also enhanced with the help of multi-equilibrium points for distinct real orders of *** system explores the generation of a four-wing attractor in different phases,both numerically and *** changing the input parameters of the system,different graphs are generated for current flow in state,phase,and space,to confirm the precision of the fractional order derivatives.A reasonable simulation shows that the deliberate circuit provides effective chaos in terms of speed and accuracy,which is comensurate with the numerical *** nonlinear chaotic behavior is utilized to encrypt sound(.wav),images(.jpg),and animated(.gif)data which are a major requirement for the security of communication *** proposed circuit performs chaos and cryptographic tasks with high-effective analog computation,and constitutes a novel approach to this area of research.

关键词： multi-wing attractors hyperbolic sine circuit realization encryption

A Modified Peng-Robinson Equation State for Prediction of Gas Adsorption Isotherm

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2014年第6期22卷 628-633页

作者： ali akbar Amooey Department of Chemical Engineering University of Mazandaran

This research proposes a modified two-dimensional Peng-Robinson equation model to predict adsorption isotherm in adsorbate-adsorbent systems. The parameters of the proposed model are calculated by using the optimization of experimental data for the different single gas adsorption systems at various temperatures. The experimental adsorption equilibrium data of adsorbate-adsorbent systems was compared with the calculated results in our proposed model and the two-dimensional Hill-deBoer equation model. The proposed model as indicated in the results shows a better prediction of the experimental results compared with two others.

关键词： gas adsorption isotherm Peng-Robinson equation state

Study of abundant explicit wave solutions of the Drinfeld-Sokolov-Satsuma-Hirota(DSSH)equation and the shallow water wave equation

在线全文

学校读者我要写书评

暂无评论

Propulsion and Power Research 2018年第4期7卷 320-328页

作者： H.M.Shahadat ali M.Mamun Miah M.ali akbar Department of Applied Mathematics Noakhali Science and Technology UniversityNoakhali 3814Bangladesh Department of Mathematics Khulna University of Engineering&Technology.Khulna 9203Bangladesh Department of Applied Mathematics University of Rajshahi.Rajshahi 6205Bangladesh

In this article,the two variable(G'G,1/G)-expansion method is suggested to investigate new and further general multiple exact wave solutions to the Drinfeld-Sokolov-Satsuma-Hirota(DSSH)equation and the shallow water wave equation which arise in mathematical physics with the aid of computer algebra software,like *** functions and the rational functions solution are *** method demonstrates power,reliability and ***,the method is the generalization of the well-known(G/G)-expansion method established by Wang et *** the method also presents a wider applicability for conducting nonlinear wave equations.

关键词： Explicit wave solutions Computer algebra software Drinfeld-Sokolov-Satsuma-Hirota(DSSH)equation Shallow water wave equation Soliton

An Analysis of Quality Management Practices on the Construction Industry of Pakistan,DHA Valley Project

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

An Analysis of Quality Management Practices on the Construct...

作者： Muhammad ali akbar 山东大学

学位级别：硕士

建筑业的质量管理是指质量规划、控制和保证。通过对施工现场不同因素的控制,保证施工项目的质量管理。因此,本研究所评估的影响品质管理实施的因素各不相同。为了解本研究所考虑的各种因素的反应,作者编制了问卷。主要是从管理人员那... 详细信息

建筑业的质量管理是指质量规划、控制和保证。通过对施工现场不同因素的控制,保证施工项目的质量管理。因此,本研究所评估的影响品质管理实施的因素各不相同。为了解本研究所考虑的各种因素的反应,作者编制了问卷。主要是从管理人员那里收集的原始数据,然后使用了不同的分析技术进行分析。结果表明,受访者对影响因素的反应,包括员工(教育、技能、培训和质量管理知识)、专业人员能力、产品/材料质量、监控、设计和严格遵守质量标准。建议营造一个鼓励员工发展技能、加强沟通、严格执行和遵守国际标准组织(ISO)认可的质量标准的氛围。

关键词：建设项目的质量管理影响建设项目质量管理的因素 DHA山谷项目巴基斯坦质量管理

Electro-oxidation of paracetamol in the presence of malononitrile:Application for green,efficient,none-catalyst,simple and one-pot electro-synthesis of new paracetamols

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第6期26卷 681-684页

作者： alireza Asghari Mohsen Ameri ali akbar Ziarati Sepideh Radmannia ali Amoozadeh Behruz Barfi Leila Boutorabi Department of Chemistry Semnan University

Electrochemical oxidation of paracetamol has been studied in the presence of malononitrile as a nucleophile in a phosphate buffer solution （0.15 tool/L, pH 7）, using cyclic voltammetric techniques. The results indicated that the N-acetyl-p-benzoquinone-imine derived from paracetamol participates in a 1,4-Michael-ts, pe addition reaction with the malononitrile to form the corresponding paracetamol derivatives （6a, 7a）. The present study has led to the development of a simple, green, non-catalyst and one-pot electrochemical method with high atom economy under mild conditions.

关键词： Electro-oxidation Cyclic voltammetry Malononitrile Michael addition type Paracetamol

An Algorithm to Reduce Compression Ratio in Multimedia Applications

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第1期74卷 539-557页

作者： Dur-e-Jabeen Tahmina Khan Rumaisa Iftikhar ali akbar Siddique Samiya Asghar Department of Electronic Engineering Sir Syed University of Engineering&TechnologyKarachiPakistan Department of Information&Computer Science Sir Syed University of Engineering&TechnologyKarachiPakistan

In recent years,it has been evident that internet is the most effective means of transmitting information in the form of documents,photographs,or videos around the *** purpose of an image compression method is to encode a picture with fewer bits while retaining the decompressed image’s visual *** transmission,this massive data necessitates a lot of channel *** order to overcome this problem,an effective visual compression approach is required to resize this large amount of *** work is based on lossy image compression and is offered for static color *** quantization procedure determines the compressed data quality *** images are converted from RGB to International Commission on Illumination CIE La^(∗)b^(∗);and YCbCr color spaces before being *** the transform domain,the color planes are encoded using the proposed quantization *** improve the efficiency and quality of the compressed image,the standard quantization matrix is updated with the respective image *** used seven discrete orthogonal transforms,including five variations of the Complex Hadamard Transform,Discrete Fourier Transform and Discrete Cosine Transform,as well as thresholding,quantization,de-quantization and inverse discrete orthogonal transforms with CIE La^(∗)b^(∗);and YCbCr to RGB *** to signal noise ratio,signal to noise ratio,picture similarity index and compression ratio are all used to assess the quality of compressed *** the relevant transforms,the image size and bits per pixel are also *** the(n,n)block of transform,adaptive scanning is used to acquire the best feasible compression *** of these characteristics,multimedia systems and services have a wide range of possible applications.

关键词： Color image compression color spaces discrete orthogonal transforms(DOTs) peak-to-signal noise ratio(PSNR) similarity index

Standardization of proton-induced x-ray emission technique for analysis of thick samples

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

Chinese Physics B 2015年第9期24卷 171-176页

作者： Shad ali Johar Zeb Abdul Ahad Ishfaq Ahmad M.Haneef Jehan akbar Department of Physics Hazara University National Center of Physics (NCP)

This paper describes the standardization of the proton-induced x-ray emission（PIXE） technique for finding the elemental composition of thick samples. For the standardization, three different samples of standard reference materials（SRMs） were analyzed using this technique and the data were compared with the already known data of these certified SRMs. These samples were selected in order to cover the maximum range of elements in the periodic table. Each sample was irradiated for three different values of collected beam charges at three different times. A proton beam of 2.57 Me V obtained using 5UDH-II Pelletron accelerator was used for excitation of x-rays from the sample. The acquired experimental data were analyzed using the GUPIXWIN software. The results show that the SRM data and the data obtained using the PIXE technique are in good agreement.

关键词： standardization thick samples PIXE analysis

The new types of wave solutions of the Burger’s equation and the Benjamin-Bona-Mahony equation

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean Engineering and Science 2018年第1期3卷 1-10页

作者： Md.Azmol Huda M.ali akbar Shewli Shamim Shanta Mathematics Discipline Khulna UniversityBangladesh Department of Applied Mathematics University of RajshahiBangladesh Department of Mathematics University of RajshahiBangladesh

In this article,we suggest the two variable(G/G,1/G)-expansion method for extracting further general closed form wave solutions of two important nonlinear evolution equations(NLEEs)that model one-dimensional internal waves in deep water and the long surface gravity waves of small amplitude propagating *** method can be regarded as an extension of the(G/G)-expansion *** ansatz of this extension method to obtain the solution is based on homogeneous balance between the highest order dispersion terms and nonlinearity which is similar to the(G/G)method whereas the auxiliary linear ordinary differential equation(LODE)and polynomial solution *** applied this method to find explicit form solutions to the Burger’s and Benjamin-Bona-Mahony(BBM)equations to examine the effectiveness of the method and tested through mathematical computational software *** new exact travelling wave solutions in more general form of these two nonlinear equations are derived by this extended *** method introduced here appears to be easier and faster comparatively by means of symbolic computation system.

关键词： Travelling wave solution Soliton Burger’s equation Benjamin-Bona-Mahony equation.