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方寸之间,引领未来

厦门航空 2008年第2期 148-150,152+154页

作者： l.p

在燃油价格高企,泊车地皮成本越来越高的情况下,耗油低,占地小的微型车越来越受到欧洲和日本消费者的欢迎,厂商不断推出新颖的微型车也就顺理成章了。城市运动其设计初衷是让更多的年轻人了解都市生活,对都市品味有全新感受。从以下几... 详细信息

在燃油价格高企,泊车地皮成本越来越高的情况下,耗油低,占地小的微型车越来越受到欧洲和日本消费者的欢迎,厂商不断推出新颖的微型车也就顺理成章了。城市运动其设计初衷是让更多的年轻人了解都市生活,对都市品味有全新感受。从以下几款概念车我们可以窥视到今后微型车的发展方向,就是小尺寸、大空间、多用途、高科技,给予人们既可节省,又可享受的一种运输工具。

关键词：微型车发动机后置概念车设计风格丰田公司汽车公司电子显示屏空间欧洲方向盘

On the functions of astrocyte-mediated neuronal slow inward currents

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Neural Regeneration Research 2024年第12期19卷 2602-2612页

作者： Balázs pál Department of physiology Faculty of MedicineUniversity of DebrecenDebrecenHungary

Slow inward currents are known as neuronal excitatory currents mediated by glutamate release and activation of neuronal extra synaptic N-met hyl-D-aspartate receptors with the contribution of *** events are significantly slower than the excitatory postsynaptic *** of slow inward currents are determined by seve ral factors including the mechanisms of astrocytic activation and glutamate release,as well as the diffusion pathways from the release site towards the extra synaptic recepto *** are stimulated by neuronal network activity,which in turn excite neurons,forming an astrocyte-neuron feedback *** as a consequence of brain edema,astrocytic swelling can also induce slow inward currents under pathological *** is a growing body of evidence on the roles of slow inward currents on a single neuron or local network *** events often occur in synchro ny on neurons located in the same astrocytic *** synchronization of neuronal excitability,slow inward currents also set synaptic strength via eliciting timing-dependent synaptic *** addition,slow inward currents are also subject to non-synaptic plasticity triggered by long-la sting stimulation of the excitatory *** note,there might be important regionspecific differences in the roles and actions triggering slow inward *** greater networks,the pathophysiological roles of slow inward currents can be better understood than physiological *** inward currents are identified in the pathophysiological background of autism,as slow inward currents drive early hypersynchrony of the neural *** inward currents are significant contributors to paroxysmal depolarizational shifts/interictal *** events are related to epil.psy,but also found in Alzheimer's disease,parkinson's disease,and stroke,leading to the decline of cognitive *** with features overl.pping with slow inward currents(excitatory,N-methyl-Dasp

关键词： astrocyte cortical spreading depolarization gliotransmission glutamate neural synchronization NMDA receptor paroxysmal depolarizational shift slow inward current

DIpOlE pOlARIZATION RElAXATION AND MOlECUlAR STRUCTURE OF MAIN-AND SIDE-CHAIN lIQUID-CRYSTAllINE pOlYMERS

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Chinese Journal of polymer Science 1996年第1期14卷 1-18页

作者： T.p.Stepanova l.l.Burshtein Institute of Macromolecular Compounds of Russian Academy of Sciences Bolshoy pr. 31 St. Petersburg 199004 RussiaInstitute of Macromolecular Compounds of Russian Academy of Sciences Bolshoy pr. 31 St. Petersburg 199004 Russia

Molecular mobility in thermotropic polyesters and side-chain polymers with different struc-ture of mesogens and spacers has been studied by dielectrical method in dilutesolutions. The results made it possible to establish the multiplicity of dielectric relaxationtransitions which reflects the small- and large-scale types of molecular motion. It was shownthat dielectric relaxation processes occurring in accordance with local mechanism (relaxationtimes 10^(-9)--10^(-7)s. and the activation energy 10--50kJ/mol) are due to the mobility of kineticchain elements of different length within a monomer units. It was found that the dielectricrelaxation process connected with a large-scale form of molecular motion (relaxation times10^(-5)--10^(-6)s. and the activation energy 100kJ/mol) did not depend on the molecular massbut was infiuenced by factors changing the conformational state of the macromolecule. It isestablished tha the cooperative reorientation mobility of associated mesogenic fragments isthe source of the large-scale process.

关键词： liquid crystal.polymers Dielectric polarization Relaxation transitions Dilute solution Aggregation

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胃肠病学与肝病学

美国医学会杂志（中文版） 1998年第1期17卷 11-13页

作者： Walt,l.p Will.M.l

Advances in Microgeophysics for Engineering and Cultural Heritage

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Journal of China University of Geosciences 2009年第3期20卷 626-639页

作者： p l Cosentino p Capizzi G Fiandaca R Martorana p Messina Department of Chemistry and physics of the Earth and Applications to Geo-Resources and Natural Risks Geophysical Section University of PalermoPalermo Italy

A large number of unconventional investigations have been implemented, tested, and validated in the field of microgeophysics, with the aim being to solve specific diagnostic and/or monitoring problems regarding civil engineering and cultural heritage studies. The investigations were carried out using different tomographic 2D and 3D approaches as well as different energy sources, namely sonic, ultrasonic and electromagnetic （radar） waves, electric potential fields, and infrared thermography. Many efforts have been made to modify instruments and procedures in order to improve the resolution of the surveys as well as to greatly reduce the time of the measurements without any loss of information. The main new methodologies here discussed are the sonic imprint, the global tomographic traveltime, the electrical resistivity tomography, and the control of external films （patinas） grown on stone monuments. The results seem to be very promising and suggest that it is the moment to dedicate time and effort to this new branch of geophysics, so that these methodologies can be used even more to diagnose, monitor, and safeguard not only engineering buildings and large structures but also ancient monuments and cultural artifacts, like pottery, statues, etc..

关键词： microgeophysics engineering cultural heritage tomography electrical sonic ultrasonic ground penetrating radar (GpR).

On the Optimization of performance of Hg_xCd_(1-x)S Based Electrochemical.photosensing Cell

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稀有金属材料与工程 2012年第S1期41卷 43-46页

作者： lendave S Al.p pingale p Cl.p Deshmukh l.p Thin Film and Solar Studies Research laboratory Department of Physics(Appli.Elect.)Solapur UniversitySolapur-413255M.S.India

Chemical growth process that favours deposition of semiconductor materials from a liquid phase was used to obtain CdS and HgxCd1-xS(0≤x≤0.25)photosensitive thin film electrodes on the stainless steel *** deposition of these series of thin films was carried out under the optimized conditions of temperature(60℃),time(90 min)and pH(10.8±0.2).These films were then employed as photosensitive electrode in an electrochemical.photosensing cell consisting of sulphide/polysulphide redox electrolyte and a graphite counter *** cells were illuminated by an input illumination intensity of 13 mW/cm 2 and the cell characteristic parameters namely photocurrent(Iph),photo voltage(Vph),the quantum conversion efficiency(η%)and fill factor(ff %)have been *** Vph and Iph have been found to be boosted as the electrode composition is *** conversion efficiency and fill factor enhanced from 0.52%to 1.30%and 31.8%to 37.8%,respectively for the change of electrode composition from 0 to *** of junction ideality factor(nd)showed recombination mechanism at the electrode-electrolyte *** height measurements gave pool-Frenkel type conduction *** flat band potentials(Vfb)were determined for all the cells and found to be enhanced with x up to 0.08 and then decreased for further increase in *** lighted junction quality factor(nl)is increased from 1.49 to 2.94 as the photoelectrode composition(x)was varied from 0 to *** barrier heights(B)at the electrode/electrolyte interfaces were also *** is found that B is higher for a cell of electrode composition equal to *** spectral studies on these cells showed the cut off wavelength(λc)shifted from 530 nm to 800 *** transient response studies showed presence of surface states at the interface that causes Fermi-level ***,performance of the electrochemical.photosensing cell is found to be improved after Hg-corboration in CdS and is optimum at x= 0.0

关键词： electrochemical cell photosensing fill factor interface states photovoltage photocurrent

On The Role of preparative parameters in Growing Nanocrystalline pbS Thin Films by liquid phase Chemical Bath Deposition

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稀有金属材料与工程 2012年第S1期41卷 28-32页

作者： Chattarki A N Deshmukh l.p Thin Film&Solar Studies Research laboratory Department of Physics&ElectronicsSolapur UniversitySolapur-413255M.SIndia

A liquid phase chemical bath deposition(lpCBD)method for deposition of pbS thin films is *** growth kinetics and reaction mechanism have been *** the deposition,triethanolamine complex of lead acetate was allowed to react with aqueous thiourea *** micro-slides were used as the *** deposition of pbS films was carried out under different growth parameters such as temperature,time,and reaction *** growth rate,under different conditions,was measured in terms of a terminal layer thickness and the possible reaction kinetics and mechanism is *** optimum values of the parameters to produce good quality films are 60 min,80℃and 10.5±*** EDS analysis showed that the film stoichiometry is dependent on the reaction pH and the films tend to be almost stoichiometric in high alkaline environment(>10.5).The pbS deposits appeared smooth,tightly adherent,uniform and reflecting with blackish-grey *** XRD studies showed crystalline cubic type of structure with preferred orientation along(200)*** calculated d-values,intensities of reflections and lattice parameter have excellent match with that of the JCpD *** crystallite size is found to be few tens of *** surface morphology revealed by SEM showed that the crystallites are randomly oriented and are of different shapes and *** of the crystallites appeared smaller and spherical in shape whereas,growth of some elongated irregular crystallites;bit larger in size and differing in shapes,have also been favoured.

关键词： lpCBD preparative parameters XRD SEM nanocrystals surface morphology

Tensile and cyclic deformation response of friction-stir-welded dissimilar aluminum alloy joints:Strain localization effect

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Journal of Materials Science & Technology 2021年第14期73卷 91-100页

作者： p.l.Niu W.Y.li D.l.Chen State Key laboratory of Solidification processing Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi'an710072.China Department of Mechanical and Industrial Engineering Ryerson University350 Victoria StreetTorontoOntarioM5B2K3Canada

Cyclic deformation behavior of friction-stir-welded dissimilar AA2024-T351 to AA7075-T65 aluminum alloy joints was evaluated via stepwise tests at different strain rates,along with transmission electron microscopy examinations to characterize the precipitates required to assess internal *** backscatter diffraction was employed to observe the inhomogeneous microstructures of the FSWed *** localization appeared in the heat affected zone(HAZ)of AA2024 *** cyclic deformation of 500 cycles at a total strain amplitude of 0.5%,the strength of the dissimilar joints resumed basically to that of AA2024 base *** the AA2024 HAZ was obviously hardened,which should be attributed to the introduced dislocations during cyclic deformation *** hardening capacity of the joints increased with decreasing strain rate.

关键词： Friction stir welding Dissimilar aluminum alloys Strain localization Cyclic hardening Sl.p irreversibility

long-Time Shoreline Monitoring of the Vellar Estuarine Complex,Southeast Coast of India:Using Multispectral Satellite Data

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Journal of Earth Science 2012年第6期23卷 900-907页

作者： l Senthilnathan E p Nobi T Thangaradjou l Kannan Centre of Advanced Study in Marine Biology Faculty of Marine SciencesAnnamalai UniversityParangipettai-608502TamilnaduIndia

The present study was carried out to track the path of Vellar estuary over a period of 38 years （1970-2008） and also to detect the impact of tsunami on estuarine complex of the Vellar estuary. Visual interpretation techniques were employed by using muitispectral data of landsat TM （1991） and IRS-p6 lISS III （2004, 2006, and 2008） to delineate shoreline changes in the VeUar estuarine complex. Results clearly revealed the changes that occurred along the estuarine path over the period, and severe erosion was noticed in the seaward side of the MGR Thittu and accretion, along the estuarine mouth. It is also visible that there is clear river path shift in the river course. Although the sandbar formation was seen with only little morphologic modification up to 2004, the Indian Ocean tsunami that struck this coast （26 December, 2004） distorted the sandbar of the Vellar estuarine mouth; however, the 2006 satel- lite images confirmed that the sandbar was formed again to its original structure as that of before the tsunami.

关键词： estuary geomorphology IRS-p6 lISS III shoreline tsunami India.