检索结果-南通市图书馆

Acta Metallurgica sinica(English Letters) 2005年第6期18卷 707-713页

作者： C.C. Zhang C.s. Yang G.F. Ding s. Q. Qian j.s. wu National Key Laboratory of Nano/Micro Fabrication Technology Key Laboratory for Thin Film and Microfabrication of Ministry of Education Institute of Micro and Nano Science and Technology Shanghai Jiaotong University Shanghai 200030 China school of Material science and Engineering Shanghai Jiaotong University Shanghai 200030 China

Microstructure and phase transformation behaviors of the film annealed at different temperatures were studied by X-ray diffractometry （XRD）, transmission electron microscopy and differential scanning calorimeter （DsC）. Also tensile tests were examined. For increasing annealed temperature, multiple phase transformations, transformations via a B19-phase or direct martensite/austenite transformtion are observed. The TiNiPd thin film annealed at 750℃ had relatively uniform martensite/austenite transformtion and shape memory effect. Martensite/austenite transformtion was also found in strain-temperature curves. subsequent annealing at 450℃ had minor effect on transformation temperatures of Ti-Ni-Pd thin films but resulted in more uniform transformation and improved shape memory effect.

关键词： Ti-Ni-Pd thin films microstructure martensitic phase transformation,shape memory effect

PHAsE TRANsFORMATION BEHAVIOR IN THE sPUTTER DEPOsITED Ti-Pd-Ni THIN FILMs

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica sinica(English Letters) 2001年第5期14卷 319-322页

作者： Q. C. Tian and j.s. wu Key Laboratory of the Ministry of Education for High Temperature Materials and Tests, school of Materials science and Engineering, shanghai jiao Tong University, shanghai 200030, China Key Laboratory of the Ministry of Education for High Temperature Materials and Tests School of Materials Science and Engineering Shanghai Jiao Tong University

Ti-Pd-Ni thin films were prepared by sputter deposition at room temperature. The as-deposited thin films were crystallized at 750°C followed by various cooling conditions, and the structural change emerging in the films was characterized by means of both X-ray diffraction (XRD) and differential scanning calorimetry (DsC). It was found that the phase transformation temperatures of Ti50.6Pd30Ni19.4 ingot we much higher than those of its thin film. The B19' and B19 phases coexisted, together with the Ti2Ni type and Ti2Pd type of precipitates at the room temperature. Both the B19-B2 one-stage and the B19'-B19-B2 two-stage phase transformations took place when the films experienced thermal change across the region of phase transformation temperatures.

关键词： Nickel Palladium sputter deposition Thin films Titanium

sTOICHIOMETRIC AND OFF sTOICHIOMETRIC ALLOYING IN Ti 5si 3 BY Nb OR Cr ADDITION

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1999年第S1期9卷 340-345页

作者： L.T. Zhang and j.s. wu Open Lab of state Education Commission for High Temperature Materials and Testing, shanghai jiao Tong University, shanghai 200030, China

Titanium silicide Ti 5si 3 whose melting temperature is 2 130 ℃ bears the potential for very high temperature application. Results on Nb or Cr addition to this compound with emphasis on its alloying behaviour were reported. Previous theoretical calculation shows that substitution of Ti by Nb or Cr atoms in Ti 5si 3 crystal will enhance the bonding between atoms. By experiment, two means of alloying were considered: stoichiometric and off stoichiometric alloying. stoichiometric alloying in Ti 5si 3 results in compounds consisting of single Ti 5si 3 phase while off stoichiometric alloying yields hypereutectic microstructure with Ti 5si 3 being the primary phase. The Ti 5si 3 phase in both cases dissolves certain amount of Nb or Cr alloying element and its composition agrees with the stoichiometric composition of (Ti,Nb) 5si 3 or (Ti,Cr) 5si 3. The moduli of the stoichiometric alloys increase with alloying element addition, indicating an enhancement in Ti 5si 3 crystal.

关键词： Ti 5si 3 Nb addition Cr addition stoichiometric alloying off stoichiometric alloying

A mild, configurable, flexible CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

在线全文

学校读者我要写书评

暂无评论

journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： Xinyue Cheng Dingsheng wu Hao Gao Qingqing Wang Pengfei Lv sam s.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University school of Mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 M ZnsO4electrolyte （pH=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

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 Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan Chen Xiu-Qing Qiao Guo Hui Bojing sun Dongfang Hou Meidi Wang Xueqian wu Tao wu Dong-sheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Hubei Three Gorges Laboratory College of Chemistry and Materials science and Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry Jinan University

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-Cds/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the Cds photocatalyst via the synergistic strategy of phase junction,schottky junction,and photothermal *** difference in atomic configuration between cubic-Cds （c-Cds） and hexagonal-Cds （h-Cds） leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic schottky junction further extracts the electrons in the hc-Cds phase junction to realize gradient charge ***,the photothermal effect of Mo2C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H2production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of Cds by constructing plasmonic tandem heterogeneous junctions.

关键词： Heterojunctions LsPR Photocatalyst Phase junction schottky junction Photothermal effect

Women in visual neural regeneration research

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 489-490页

作者： Tonia s.Rex David j.Calkins Vanderbilt Eye Institute Vanderbilt University Medical CenterNashvilleTNUSA

The year 2024 marks the 60^(th)anniversary of Title IX and 25 years since the New York Times revealed bias against female faculty members at the Massachusetts Institute of *** take an opportunity here to examine the state of gender bias in a relatively new yet already prominent field,neural regeneration in the visual system,for which there is a well-defined context useful for this *** National Eye Institute(NEI)provided the first round of research funding for its Audacious Goals Initiative(AGI)on visual neural regeneration in 2013 and the last round in ***,we focus on this *** sources included PubMed,the National science Foundation(NsF),the NEI,the Blue Ridge Institute for Medical Research and data from the major professional organization for eye and vision research,the Association for Research in Vision and Ophthalmology(ARVO).

关键词： neural visual Times

Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

在线全文

学校读者我要写书评

暂无评论

journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming Zhang Hanyu wu Qi Chen jiaxin Yang Bonan Liu school of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1s）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

BEsT WEIGHT PATTERN EVALUATION BAsED sECURITY CONsTRAINED POWER DIsPATCH ALGORITHM

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 systems science and systems Engineering 2007年第3期16卷 287-307页

作者： Lakhwinder sINGH j.s. DHILLON Baba Banda singh Bahadur Engineering College Fatehgarh Sahib- 140407 Punjab India sant Longowal Institute of Engineering & Technology Longowa1-148 106 Punjab India

This paper presents a methodology which determines the allocation of power demand among the committed generating units while minimizes number of objectives as well as meets physical and technological system constraints. The procedure considers two decoupled problems based upon the dependency of their goals on either active power or reactive power generation. Both the problems have been solved sequentially to achieve optimal allocation of active and reactive power generation while minimizes operating cost, gaseous pollutants emission objectives and active power transmission loss with consideration of system operating constraints along with generators prohibited operating zones and transmission line flow limits. The active and reactive power line flows are obtained with the help of generalized generation shift distribution factors （GGDF） and generalized Z-bus distribution factors （GZBDF）, respectively. First problem is solved in multi-objective framework in which the best weights assigned to objectives are determined while employing weighting method and in second problem, active power loss of the system is minimized subject to system constraints. The validity of the proposed method is demonstrated on 30-bus IEEE power system.

关键词： Multi-objective optimization best weight pattern evaluation fuzzy decision making membership function generalized generation shift distribution factors generalised Z-bus distribution factors

FUZZY sATIsFYING INTERACTIVE MULTIOBjECTIVE THERMAL POWER DIsPATCH： sWT APPROACH

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

journal of systems science and systems Engineering 2007年第1期16卷 88-106页

In multiobjective optimization, trade-off analysis plays an important role in determining most preferred solution. This paper presents an explicit interactive trade-off analysis based on the surrogate worth trade-off function to determine the best compromised solution. In the multiobjective framework thermal power dispatch problem is undertaken in which four objectives viz. cost, NOx emission, sOx emission and COx emission are minimized simultaneously. The interactive process is implemented using a weighting method by regulating the relative weights of objectives in systematic manner. Hence the weighting method facilitates to simulate the trade-offrelation between the conflicting objectives in non-inferior domain. Exploiting fuzzy decision making theory to access the indifference band, interaction with the decision maker is obtained via surrogate worth trade-off （sWT） functions of the objectives. The surrogate worth trade-off functions are constructed in the functional space and then transformed into the decision space, so the surrogate worth trade-off functions of objectives relate the decision maker＇s preferences to non-inferior solutions through optimal weight patterns. The optimal solution of thermal power dispatch problem is obtained by considering real and reactive power losses. Decoupled load flow analysis is performed to find the transmission losses. The validity of the proposed method is demonstrated on 11-bus, 17-lines IEEE system, comprising of three generators.

关键词： Multiobjective thermal power dispatch weighting method fuzzy membership function non-inferior solutions sWT functions

Transient parameter analysis of pneumatic conveying of fine particles for predicting the change of mode of flow

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

Particuology 2017年第3期15卷 82-88页

作者： shijo j.s. Niranjana Behera school of Mechanical & Building sciences VIT University Vellore Tamilnadu 632014 India

During the process of pneumatic conveying of fine particles, the flow mode may change from dense to dilute. In studying this mode change, we evaluate three parameters （Hurst exponent, shannon entropy, and phase-space attractor size） used in signal analysis. Experimental data of pneumatic conveying of fly ash at three locations along a 173-m-long pipeline were used for this analysis. Variations in magnitude of the Hurst exponent, shannon entropy, and size of the phase space attractor exhibit different trends in their variations for dense and dilute mode of flow. From these trends it is possible to predict the change from dense to dilute mode and the location along the length of the pipeline of this change in mode of flow.

关键词： Fluidized denseHurst exponent shannon entropy Phase space