检索结果-南通市图书馆

Directed segregation in compartmentalized bi-disperse granular gas

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第1期21卷 284-288页

作者： sajjad hussain shah Li Yin-Chang Cui Fei-Fei Zhang Qi Hou Mei-Ying Physics Department Beijing Institute of TechnologyBeijing 100081China Institute of Physics Chinese Academy of SciencesBeijing 100190China

A bi-disperse granular gas in an asymmetrical two-compartment system is studied experimentally. The presence of asymmetry within the range of our experimental parameters results in a directed segregated state and a directed clustering state. This deterministic system does not depend on the initial conditions. A modified flux model based on Lohse＇s flux model for bi-disperse granular gases is derived. The modified flux model explains qualitatively the experimental results.

关键词： granular matter segregation nonlinear dynamics

Irregular Oscillation of Bi-disperse Granular Gas in Cyclic Three Compartments

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第3期29卷 128-131页

作者： sajjad hussain shah LI Yin-Chang CUI Fei-Fei ZHANG Qi Pierre Evesque HOU Mei-Ying Department of Physics Beijing Institute of TechnologyBeijing 100081 Institute of Physics Chinese Academy of SciencesBeijing 100190 Lab MSSMat EcoleCentrale de Paris92295 Châtenay-MalabryFrance

A 3-D molecular dynamics simulation of a bi-disperse vibro-fluidized granular gas in a cyclic three-compartment cell is performed.A cluster of particles is randomly found in one of the ***'s flux model is modified to incorporate inelastic particle-boundary *** model predicts that periodically there is clustering in each *** is then found that if the model is further modified to incorporate Gaussian white noise,it correctly predicts the non-sequential clustering behavior confirming that there is no chaotic behavior.

关键词： behavior disperse incorporate

Effect of Number Density on Velocity Distribution in a Driven Quasi-2D Granular Gas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of Number Density on Velocity Distribution in a Drive...

Immunomodulatory Effect of Purified Exotoxins of <i>Staphylococcus aureus</i>in Association with Bird Flu Virus Vaccine in Broilers

第七届全国液体和软物质物理学术会议

作者： sajjad hussain shah Chinese Academy of sciences

＜正＞We have studied the motion of mono-disperse spherical steel particles in an experimental setup of a quasi two dimensional square *** effect of gravity has been eliminated by vibrating the cell *** increasing number density,the dilute fluid has been gradually alternated into dense *** velocity distributions,at the central portion of the

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

American Journal of Molecular Biology 2019年第1期9卷 1-15页

作者： Muhammad Usman Ghani Muhammad Danish Mehmood Amna Javed Farheen Ansari Huma Anwar Sana Noreen sajjad hussain shah Ottoman Pharma (Immuno Division) Lahore Pakistan Institute of Molecular Biology and Biotechnology University of Lahore Lahore Pakistan

Immunization is the most effective method still used against infectious agents. Although not always, vaccines ineffectiveness is reported enormously against many of the pathogens throughout the world in poultry, particularly in case of killed or sub unit vaccine. The current project is, therefore, carried out as a preliminary study on broiler chickens to investigate the modulation of immune system against avian influenza virus in association with purified Staphylococcus aureus toxoid. After isolation of Gram positive cocci bacteria on mannitol salt agar from raw milk, yogurt and chicken meat were subsequently biochemically characterized by using rapid diagnostic kit. Pure culture of S. aureus was inoculated into digitally controlled bio-fermentor containing mannitol salt broth for production of toxins. Enormous production of bacteria was passed through sequence of filtration system based on 0.45 μm followed by 0.22 μm size. The centrifugation of the filtrate was made at 10,000 rpm for 60 minutes at 5℃ followed by 56,100 rpm for 20 minutes and clear supernatant containing Staphylococcus enterotoxin (SEs) was obtained. Bradford estimation of proteins further provided 305 μg/ml of SEs toxoid. Four types of oil adjuvant avian influenza type H9N2 virus vaccines (without toxoid, 91.5 μg/0.3ml, 22.8 μg/0.3ml and 11.43 μg/0.3ml) were injected into healthy AI H9N2 susceptible broilers and anti-H9N2 HI antibody titers were measured in terms of hemagglutination inhibition test. It was observed that on the 8th day, post vaccination cumulative mean anti AIH9 HI antibody titer of G-1, G-2, G-3, G-4 and G-5 was 3.13 ± 0.406, 5.13 ± 0.246, 3.96 ± 0.159, 3.25 ± 0.237 and 0.78 ± 0.467 respectively. It was found that all the vaccines induced protective titers 18 days’ post vaccination, but vaccine containing 91.5 μg/dose of SEs toxoid showed significantly higher (P < 0.05) immune response as compared to vaccine containing 22.8 μg/dose and 11.43 μg/dose, whereas, vaccines containing SE

关键词： AIV H9N2 Staphylococcus aureus Toxoid Super Antigen Immunomodulation HI Assay

Melting Characteristics of a Phase Change Material Mixed with Nano Particles of Cobalt Oxide Bounded in a Trapezoidal Structure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2022年第1期130卷 255-268页

作者： Waris Ali Asif Ali Shaikh Feroz shah sajjad hussain Department of Basic Sciences and Related Studies Mehran University of Engineering and TechnologyJamshoroPakistan School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore Department of Mathematics Govt Postgraduate College LayyahPunjabPakistan

A novel trapezoidal design for storage of heat energy through melting of phase-change material(PCM)is *** heat thermal energy storage system(LHTES)is a promising option to diminish mis-match between energy consumption and *** this purpose,Paraffin:Rubitherm-35(RT35)material is successively melted in aluminum structure which is heated from one side and the other sides are kept *** of PCM is observed experimentally and melt fronts are photographed for various time *** fluid-solid module in COMSOL Multiphysics 5.4 has been *** transient heat conduction with enthalpy function is *** are carried out for enhancement of thermal conductivity through addition of nano-entities of cobalt oxide *** time is notably reduced with inclusion of nano-entities to enhance thermal *** time spans for melt start and total melt in case of pure PCM are 375 and 4500(s)respectively whereas for the nano mix case,these are 150 and 3000 *** 33%shorter time length is noticed for charging of the PCM trapezoidal matrix with nano entities of Co3O4 *** results fromsimulation and lab observations depict similar patterns and are in quite close comparison.

关键词： Trapezoidal enclosure nano entities heat transfer phase change material COMSOL multiphysics 5.4 numerical simulation

Hydrometallurgical leaching and kinetic modeling of low-grade manganese ore with banana peel in sulfuric acid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2021年第2期28卷 193-200页

作者： sajjad Ali Yaseen Iqbal Inamullah Khan Ansar Ullah Muhammad Sadiq Muhammad Fahad Khizar hussain shah Materials Research Laboratory Department of PhysicsUniversity of Peshawar25120 PeshawarPakistan Department of Electrical and Computer Engineering COMSATS University IslamabadAbbottabad CampusUniversity Road 22060 AbbottabadPakistan Department of Chemistry COMSATS University IslamabadAbbottabad CampusUniversity Road 22060 AbbottabadPakistan

Manganese was leached from a low-grade manganese ore(LGMO)using banana peel as the reductant in a dilute sulfuric acid *** effects of banana peel amount,H2SO4 concentration,reaction temperature,and time on Mn leaching from the complex LGMO were studied.A leaching efficiency of~98%was achieved at a leaching time of 2 h,banana peel amount of 4 g,leaching temperature of 120°C,manganese ore amount of 5 g,and sulfuric acid concentration of 15vol%.The phase,microstructural,and chemical analyses of LGMO samples before and after the leaching process confirmed the successful leaching of ***,the leaching process followed the shrinking core model and the leaching rate was controlled by a surface chemical reaction(1−(1−x)^1/3=kt)mechanism with an apparent activation energy of 40.19 kJ·mol^−1.

关键词： low-grade manganese ore glucose leaching kinetics activation energy

Quaternion Integers Based Higher Length Cyclic Codes and Their Decoding Algorithm

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第10期73卷 1177-1194页

作者： Muhammad sajjad Tariq shah Mohammad Mazyad Hazzazi Adel R.Alharbi Iqtadar hussain Department of Mathematics Quaid-I-Azam UniversityIslamabad45320Pakistan Department of Mathematics College of ScienceKing Khalid UniversityAbha61413Saudi Arabia College of Computing and Information Technology University of TabukTabuk71491Saudi Arabia Department of Mathematics Statistics and PhysicsQatar UniversityDoha2713Qatar

The decoding algorithm for the correction of errors of arbitrary Mannheim weight has discussed for Lattice constellations and codes from quadratic number *** these lines,the decoding algorithms for the correction of errors of n=p−12 length cyclic codes(C)over quaternion integers of Quaternion Mannheim(QM)weight one up to two coordinates have *** continuation,the case of cyclic codes of lengths n=p−12 and 2n−1=p−2 has studied to improve the error correction *** this study,we present the decoding of cyclic codes of length n=ϕ(p)=p−1 and length 2n−1=2ϕ(p)−1=2p−3(where p is prime integer andϕis Euler phi function)over Hamilton Quaternion integers of Quaternion Mannheim weight for the correction of ***,the error correction capability and code rate tradeoff of these codes are also ***,an increase in the length of the cyclic code is achieved along with its better code rate and an adequate error correction capability.

关键词： Mannheim distance monoid ring cyclic codes parity check matrix extension syndromes decoding code rate and error correction capability

Cooperative Subcarrier Sensing Using Antenna Diversity Based Weighted Virtual Sub Clustering

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2016年第10期13卷 44-57页

作者： Bushra Mughal sajjad hussain Abdul Ghafoor College of Signals National University of Sciences and Technology (NUST) School of Engineering University of Glasgow

The idea of cooperation and the clustering amongst cognitive radios(CRs) has recently been focus of attention of research community, owing to its potential to improve performance of spectrum sensing(SS) schemes. This focus has led to the paradigm of cluster based cooperative spectrum sensing(CBCSS). In perspective of high date rate 4th generation wireless systems, which are characterized by orthogonal frequency division multiplexing(OFDM) and spatial diversity, there is a need to devise effective SS strategies. A novel CBCSS scheme is proposed for OFDM subcarrier detection in order to enable the non-contiguous OFDM(NC-OFDM) at the physical layer of CRs for efficient utilization of spectrum holes. Proposed scheme is based on the energy detection in MIMO CR network, using equal gain combiner as diversity combining technique, hard combining(AND, OR and Majority) rule as data fusion technique and antenna diversity based weighted clustering as virtual sub clustering algorithm. Results of proposed CBCSS are compared with conventional CBCSS scheme for AND, OR and Majority data fusion rules. Moreover the effects of antenna diversity, cooperation and cooperating clusters are also discussed.

关键词： cooperative spectrum sensing MIMO based clustering OFDM subcarrier detection energy detection

Invariant of Enhanced AES Algorithm Implementations Against Power Analysis Attacks

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第7期72卷 1861-1875页

作者： Nadia Mustaqim Ansari Rashid hussain Sheeraz Arif Syed sajjad hussain Department of Electronic Engineering Dawood University of Engineering&TechnologyKarachiPakistan Faculty of Engineering Sciences and Technology Hamdard UniversityKarachiPakistan Faculty of Information Technology Salim Habib UniversityKarachiPakistan Faculty of Computer Sciences SZABISTKarachiPakistan

The security of Internet of Things(IoT)is a challenging task for researchers due to plethora of IoT *** Channel Attacks(SCA)are one of the major *** prime objective of SCA is to acquire the information by observing the power consumption,electromagnetic(EM)field,timing analysis,and acoustics of the ***,the attackers perform statistical functions to recover the *** Encryption Standard(AES)algorithm has proved to be a good security solution for constrained IoT *** paper implements a simulation model which is used to modify theAES algorithm using logicalmasking *** invariant of the AES algorithm hides the array of bits during substitution byte transformation of *** model is used against SCAand particularly Power Analysis Attacks(PAAs).Simulation model is designed on MATLAB *** will give better solution by hiding power profiles of the IoT devices against *** future,the lightweight AES algorithm with false key mechanisms and power reduction techniques such as wave dynamic differential logic(WDDL)will be used to safeguard IoT devices against side channel attacks by using Arduino and field programmable gate array(FPGA).

关键词： Side channel attacks power analysis attacks network security masking advance encryption standard