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Applied Mathematics and Mechanics(english edition) 2021年第1期42卷 39-52页

作者： A.e.ABOUeLReGAL Department of Mathematics College of Science and ArtsJouf UniversityAl-Qurayyat 77423Saudi Arabia Department of Mathematics Faculty of ScienceMansoura UniversityMansoura 35516Egypt

A mathematical model linking thermoelasticity to photothermal experiments is proposed with the consideration of the photothermal *** system equations for coupled plasma,heat conduction with phase-lags(PLs),and motion equations are introduced and solved by using the Laplace transform *** photothermal,thermal,and elastic waves in a rotating solid cylinder of semiconductor material are analyzed with the proposed *** cylinder surface is constrained and subjected to a time-dependent pulse heat *** sensitivity of the physical fields for the angular velocity,PLs,and thermal vibration parameters is *** addition,the effects of the effective parameters on the physical quantities are graphically illustrated and discussed in detail.

关键词： photothermal phase-lag(PL) solid cylinder rotation semiconductor carrier concentration

Four kinds of eNU-induced white spot mice and chromosome locations of the mutant genes

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Chinese Science Bulletin 2003年第24期48卷 2658-2664页

作者： WU Baojin1,2, MAO Huihua1, SHAO Yixiang1, XUe Zhengfeng1 & LI Houda1 1. Comparative Medicine Center of Yangzhou University, Yangzhou 225009, China 2. Medical College of Yangzhou University, Yangzhou 225001, China Correspondence should be addressed to Li Houda (e-mail: houdali @***) Comparative Medicine Center of Yangzhou University Yangzhou China Medical College of Yangzhou University Yangzhou China

Phenotype-driven is the name for an ap-proach used to study gene functions through mutagenesis, location and cloning of the mutant gene. In this study, 150 male C57BL/6J(B6) mice were treated with eNU and repro-duced a total offspring of 3860. Of these descendants, 210 exhibited mutation phenotypes by screening, and more than 10 of them are hereditable. Four kinds of mutant mice, named Wbct, W-1Bao, W-2Bao, and W-3Bao, showed dominant hereditary white spot mutation with partial albinism on their belly, distal limbs and tail terminal. To map these mutant genes, 39 microsatellites, equally distributed on the mouse genome and with difference between B6 and DBA/2J (D2), were selected to scan the genome after discrimination of the white spots in the F2 mice [(B6×D2)×D2]. It is found that, the log odds score (LODS) between W-1Bao and D5Mit168 is 0.56, and the LODS of W-1Bao and D5Mit352 is 4.47. With the gradual application of microsatellites D5Mit290, D5Mit312, D5Mit308 and D5Mit356 that are close to the mutant gene, and the number of F2 mice going up to 537, the mutant W-1Bao is located between D5Mit356 and D5Mit308 on chro-mosome 5, about 42.19 cM from the centromere. In the same way, W-2Bao and W-3Bao are mapped nearby W-1Bao, and Wbct is located on chromosome 1, about 41.6 cM from the centro-mere. After searching for the mouse genome database (MGD) and performing a one-by-one study of all genes located on chromosome subregion, it is believed that the kit gene is an excellent candidate for the white spot mutations of W-1Bao, W-2Bao and W-3Bao.

关键词：染色体突变基因基因工程 eNU

Size-dependent thermoelastic initially stressed micro-beam due to a varying temperature in the light of the modified couple stress theory

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Applied Mathematics and Mechanics(english edition) 2020年第12期41卷 1805-1820页

The bending of the euler-Bernoulli micro-beam has been extensively modeled based on the modified couple stress(MCS)*** many models have been incorporated into the literature,there is still room for introducing an improved model in this *** this work,we investigate the thermoelastic vibration of a micro-beam exposed to a varying temperature due to the application of the initial stress employing the MCS theory and generalized *** MCS theory is used to investigate the material length scale *** the Laplace transform,the temperature,deflection,displacement,flexure moment,and stress field variables of the micro-beam are *** effects of the temperature pulse and couple stress on the field distributions of the micro-beam are obtained numerically and graphically *** numerical results indicate that the temperature pulse and couple stress have a significant effect on all field variables.

关键词： thermoelectricity micro-beam initial stress temperature pulse modified couple stress(MCS)theory

Fuzzy c-means clustering with non local spatial information for noisy image segmentation

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Frontiers of Computer Science 2011年第1期5卷 45-56页

作者： Feng Zhao (1) add_zf1119@*** Licheng Jiao (1) Hanqiang Liu (1) Xidian Univ Key Lab Intelligent Percept & Image Understanding Minist Educ China Inst Intelligent Informat Proc Xian 710071 Peoples R China

As an effective image segmentation method, the standard fuzzy c-means （FCM） clustering algorithm is very sensitive to noise in images. Several modified FCM algorithms, using local spatial information, can overcome this problem to some degree. However, when the noise level in the image is high, these algorithms still cannot obtain satisfactory segmentation performance. In this paper, we introduce a non local spatial constraint term into the objective function of FCM and propose a fuzzy c- means clustering algorithm with non local spatial information （FCM_NLS）. FCM_NLS can deal more effectively with the image noise and preserve geometrical edges in the image. Performance evaluation experiments on synthetic and real images, especially magnetic resonance （MR） images, show that FCM NLS is more robust than both the standard FCM and the modified FCM algorithms using local spatial information for noisy image segmentation.

关键词： image segmentation fuzzy clustering algo-rithm non local spatial information magnetic resonance(MR) image

Database-Based Web Page

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Wuhan University Journal of Natural Sciences 2001年第Z1期6卷 443-447页

作者： Liang Dan xi 1, Liu Gang 1, Li en min 1,Peng Xue hua 2 1.Department of Computer Science and engineering, Tongji University, Shanghai 200092, China 2.e Commerce Application Development Architect, Professional Service Group, Sun MicroSystems Department of Computer Science and engineering Tongji University Shanghai China e-Commerce Application Development Architect Professional Service Group Sun MicroSystems and Netscape Alliance North York Canada

Database based web page which uses IIS4.0 + ASP + ADO + SQL7.0 is briefly introduced. It has been successfully used in e commerce, bulletin board system and chat room, and so on in the web site of Computer Center Hu... 详细信息

关键词： Internet information server active server page active data object SQL server

Study of OCDs Reliability estimation System Based on Bio-Immunology

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Journal of Bionic engineering 2009年第3期6卷 306-310页

作者： Dan-e Wu~1 Qiu-zhan Zhou~1 Ping-ping Liu~2 He-bin Zhang1.College of Communication engineering,Jilin University,Changehun 130022,P.R.China2.Department of Computer Science and Technology,Jilin University,Changchun 130012,P.R.China College of Communication engineering Jilin University Changchun P. R. China Department of Computer Science and Technology Jilin University Changchun P. R. China

We introduce the relationship between excess noise in Optoelectronic Coupled Devices (OCDs) and their interior defects and explain how low-fiequency noise can be used to estimate their *** concepts from the biological immune system and its process of identifying invaders,we present a system for estimation of the reliability of *** system has expressions for the antigen (excess noise),lymphocyte (criterion) and the role of the lymphocyte eliminating unreliable devices. A genetic algorithm was used to estimate the components parameters of the noise spectrum for estimating the reliability of *** experimental results demonstrated that this method is reliable,adaptable and practical.

关键词： low-frequency noise artificial immunity genetic algonthm device reliability

The sexually dimorphic expression of glutamate transporters and their implication in pain after spinal cord injury

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Neural Regeneration Research 2025年第11期20卷 3317-3329页

作者： Jennifer M.Colón-Mercado Aranza I.Torrado-Tapias Iris K.Salgado Jose M.Santiago Samuel e.Ocasio Rivera Dina P.Bracho-Rincon Luis H.Pagan Rivera Jorge D.Miranda Department of Physiology University of Puerto RicoMedical Sciences CampusSan JuanPRUSA National Institutes of Health National Human Genome Research InstituteBethesdaMDUSA Universidad Central del Caribe School of MedicineBayamónPRUSA University of Puerto Rico Carolina CampusCarolinaPRUSA Institute of Neurobiology San JuanPRUSA

In addition to the loss of motor function,~60% of patients develop pain after spinal cord *** cellular-molecular mechanisms are not well understood,but the data suggests that plasticity within the rostral,epicenter,and caudal penumbra of the injury site initiates a cellularmolecular interplay that acts as a rewiring mechanism leading to central neuropathic *** can lead to the formation of new connections triggering abnormal sensory *** excitatory glutamate transporters are responsible for the reuptake of extracellular glutamate which makes them a critical target to prevent neuronal hyperexcitability and *** previous studies showed a sexually dimorphic therapeutic window for spinal cord injury after treatment with the selective estrogen receptor modulator *** this study,we investigated the anti-allodynic effects of tamoxifen in male and female rats with spinal cord *** hypothesized that tamoxifen exerts anti-allodynic effects by increasing the expression of glutamate transporters,leading to reduced hyperexcitability of the secondary neuron or by decreasing aberrant *** and female rats received a moderate contusion to the thoracic spinal cord followed by subcutaneous slow-release treatment of tamoxifen or matrix pellets as a control(placebo).We used von Frey monofilaments and the“up-down method”to evaluate mechanical *** treatment decreased allodynia only in female rats with spinal cord injury revealing a sexdependent *** expression profile of glutamatergic transporters(excitatory amino acid transporter 1/glutamate aspartate transporter and excitatory amino acid transporter 2/glutamate transporter-1)revealed a sexual dimorphism in the rostral,epicenter,and caudal areas of the spinal cord with a pattern of expression primarily on *** rodents showed a significantly higher level of excitatory amino acid transporter-1 expression while male rodents showed increased

关键词： allodynia central neuropathic pain eAAT-1/GLAST eAAT-2/GLT-1 glutamate transporters selective estrogen receptor modulator sexual dimorphism spinal cord injury trauma

Collapse assessment of steel moment frames using endurance time method

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earthquake engineering and engineering Vibration 2015年第2期14卷 347-360页

作者： e.Rahimi H.e.estekanchi Department of Civil engineering Sharif University of Technology (SUT)

In endurance time(eT) method structures are subjected to a set of predesigned intensifying excitations. These excitations are produced in a way that their response spectrum, while complying with a specifi ed spectrum, intensifi es with time so they can be used approximately to simulate the average effects of several ground motions scaled to different intensities. In this paper applicability of the eT method for evaluating collapse potential of buildings is investigated. A set of four steel moment frames is used for collapse assessment. The process of using eT method in collapse evaluation is explained and the results are compared with incremental dynamic analysis(IDA) results. It is shown that although the computational effort using the eT method is much less than the IDA analysis, the results of both methods are consistent. Finally collapse fragility curves using eT and IDA methods are produced and it is shown that the probabilities of collapse in different hazard levels are also consistent.

关键词： endurance time method collapse analysis incrementa

Tuning the Fermi level in Bi2Se3 bulk materials and transport devices

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Frontiers of physics 2012年第2期7卷 160-164页

作者： Zhi-yong Wang (1) Peng Wei (1) Jing Shi (1) Department of Physics & Astronomy University of California Riverside USA

Bi2Se3 has been predicted to be a three-dimensional （3D） topological insulator （TI） with Dirac fermions residing on the two-dimensional （2D） surface. Unique transport properties such as high carrier mobility due to the suppressed backscattering are expected for the Dirac fermions. In order to eliminate the contribution of the bulk carriers, therefore, to place the Fermi level in the band gap of Bi2Se3, we first introduce various amounts of Ca dopants into the crystal to realize the bulk insulating state. Then by avoiding uncontrolled heating and electron beam irradiation in the nanofabrication process, we maintain the insulating state in thin devices. By sweeping the gate voltage, we have observed a conductivity minimum that is expected for the Dirac fermions in the band gap of 3D TIs.

关键词： topological insulators Bi2Se3 transport properties nano-devices

Theoretical analysis of some problems in the measurement of beam divergence angle for eAST neutral beam injector

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 300-304页

作者： YongJian Xu (1) ChunDong Hu (1) 1. Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

Beam angular divergence is one of the indicators to evaluate the beam quality. Operating parameters of the beam extraction system could be adjusted to gain better beam quality following the measurement results, which will be helpful not only to study the transmission characteristics of the beam and the power distribution on the heat load components, but also to understand the real-time working condition of the ion source and beam extraction system. This study includes: (1) the theoretical analysis of beam extraction pulse duration for measurement of beam angular divergence; (2) the theoretical analysis of beam intensity distribution during beam transmission for experimental Advanced Superconducting Tokomak (eAST) neutral beam injector. Those theoretical analyses could point the way to the measurement of beam divergence angle for eAST neutral beam injector.

关键词： neutral beam beam divergence angle beam intensity pulse duration