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Acta Metallurgica Sinica(English Letters) 2005年第2期18卷 145-148页

作者： F.H.Li Z.G.Fan J.Wang C.S.Liu D.W.Soh y.J.Cho SchoolofMaterialandMetallurgy NortheasternUniversityShenyang110004China MyongjiUniversity Yongjin449-728SouthKorea

The melting temperature and critical transition temperature Tc of yBa2Cu3O7-δ with deferent content additives of PbO and BaPbO3 were studied. When PbO was doped in yBa2Cu3O7-δ, the melting temperature of yBa2Cu3O7-δ was reduced, however its superconductivity was weakened. From the XRD pattern of the sintered mixture of yBa2Cu3O7-δ and PbO, it was known that there was a reaction between yBa2Cu3O7-δ and PbO, and the product was BaPbO3. Hence different contents of BaPbO3 (10mass%, 20mass% and 30mass%) were added in yBa2Cu3O7-δ. It was proved that there were no reactions between yBa2Cu3O7-δ and BaPbO3. And the superconductivity of the mixtures was much better than that of the samples with PbO additive.

关键词： yBa2Cu3O7-δ PbO additive melting temperature superconductivity

[Na(DB18-C-6)(H2O)2][Na(DB18-C-6)(SCN)2]：Two-Di-mensional Network Complex Assembled by π-π Stacking Interactios,Hydrogen Bonds and Electrostatic Interactions

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Chinese Journal of Chemistry 2002年第5期20卷 424-426页

作者： Zhu D.-Z. Song X.-M. Dou J.-M. Liu y. Wang D.-Q. Department of Chemistry Liaocheng Teacher's College Liaocheng 252000 China

A novel two-dimensional network dibenzo-18-crown-6 (DB18-C-6) complex: [Na(DB18-C-6) (H2O)2] [Na(DB18-C-6) (SCN)2] has been isolated and characterized by elemental, IR and X-ray diffraction analysis. The crystal structure belongs to monoclinic, space group P2 1/c with cell dimensions a = 1.06178(7), b = 1.40243(8), c = 3.03496(19) nm, β = 90.4220(10)°, V = 4.5292(5) nm3, Z = 4, Dcalcd = 1.351 g/cm3, F(000) = 1936, R1 = 0.0369, wR2 = 0.0821. The most interesting feature in this structure is that complex cation and complex anion form a two-dimensional network via π-π stacking interactions, hydrogen bonds and electrostatic interactions.

关键词： Crown ether Crystal structure DB18-crown-6 Hydrogen bonds π-π stacking interactions

Study of Correlation Coefficient for Breast Tumor Detection in Microwave Tomography

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Open Journal of Antennas and Propagation 2015年第4期3卷 27-36页

作者： L. Mohamed N. Ozawa y. Ono T. Kamiya y. Kuwahara Graduate School of Engineering Shizuoka University Hamamatsu-shi Japan

In microwave tomography, it is necessary to increase the amount of diverse observation data for accurate image reconstruction of the dielectric properties of the imaging area. The multi-polarization method has been proposed as a suitable technique for the acquisition of a variety of observation data. While the effectiveness of employing multi-polarization to reconstruct images has been confirmed, the physical considerations related to image reconstruction have not been investigated. In this paper, a compact-sized imaging sensor using multi-polarization for breast cancer detection is presented. An analysis of the correlation coefficient of the received data of adjacent antennas was performed to interpret the imaging results. Numerical simulation results demonstrated that multi-polarization can reconstruct images better compared to single polarizations owing to its low correlation coefficient and condition number.

关键词： Microwave Tomography Inverse Scattering Distorted Born Iterative Method (DBIM) Breast Tumor Correlation Coefficient

Application of Supercritical CO2 Gas Turbine for the Fossil Fired Thermal Plant

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Journal of Energy and Power Engineering 2010年第9期4卷 7-15页

作者： y.Muto S. Ishiyama y. Kato T. Ishizuka M. Aritomi Research Laboratory for Nuclear Reactors Tokyo Institute of Technology Tokyo 152-8550 Japan Tokai Research Establishment Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan MCX Institute Meguro Tokyo 152-0033 Japan

A supercritical CO2 gas turbine cycle can produce power at high efficiency and the gas turbine is compact compared with the steam turbine. Therefore, it is very advantageous power cycle for the medium temperature range less than 650 ℃. The purpose of this paper is to show how it can be effectively applied not only to the nuclear power but also to the fossil fired power plant. A design of 300 MWe plant has been carried out, where thermal energy of flue gas leaving a CO2 heater is utilized effectively by means of economizer and a high cycle thermal efficiency of 43.4 % has been achieved. Since the temperature and the pressure difference of the CO2 heater are very high, the structural design becomes very difficult. It is revealed that this problem can be effectively solved by introducing a double expansion turbine cycle. The component designs of the CO2 heater, the economizer, supercritical CO2 turbines, compressors and the recuperators are given and it is shown that these components have good performances and compact sizes.

关键词： Supercritical CO2 cycle gas turbine heat exchanger thermal power plant thermal efficiency PCHE CO2 heater

The determination of Cl- in concrete materials by ion chromatography

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The determination of Cl- in concrete materials by ion chroma...

Condensate Polishing System for PWR Nuclear Power Plant

TEIM2015第六届无机材料结构、性能及测试表征技术研讨会

作者： H.y.Guan J.J.Ding M.y.Wang Z.B.Guo y.F.Mei 中国建材检验认证集团股份有限公司

The determination of chloride ions in concrete materials accurately is far and away crucial,since chloride ions can cause corrosion of steel and concrete cover *** conventional potential method and silver nitrate titration method usually show features of simple operation and short duration,nevertheless,they are not suitable for accurate analysis for concrete attributing to their low accuracy and detection *** this paper,an ionchromatography method was presented to detemiine chlorine in concrete *** samples were pre-processed and then extracted with distilled *** extraction solutions were purified on a 0.22μm filter membrane,an On Guard SPE-RP column and a SPE-H column sequentially for eliminating undissolved substance,organisms and metal ions before ion chromatographic *** chromatographic separation was performed on a Dionex ICS-1000 Chromatographic using 25.0 mmol/L KOH solutions as mobile phase at 1.0mL/*** show that the detection limit of the method was 0.004 mg/*** linear relationship of the external Clstandard solutions was 0.9994,and the RSD was 2.1%.

关键词： SPE The determination of Cl in concrete materials by ion chromatography

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Journal of Energy and Power Engineering 2011年第10期5卷 999-1004页

作者： A.L. Wang C.y. Zhang y.Q. yang L.L. yin Shandong Electric Power Engineering Consulting Institute Co. Ltd. Jinan Shandong 250013 China Jinan Power Electrical Facility Co. Ltd. Jinan Shandong 250013 China State Nuclear Electric Power Planning Design ＆ Research Institute Beijing 100094 China

In this paper, operation characteristic of condensate polishing system is studied during startup, based on generator blowdown limit, given limit ion concentration in condensate during condenser leakage. Further give conclusion about condensate polishing system configuration and operation requirement： full flow condensate polishing system （CPS） is necessary to the units cooled by sea water, and it is better that one or two series put in service during normal operation other than all of them in hot standby. While continuous condensate tube leakage is 256 L/h, the units cooled by fresh water will be shutdown immediately, for this level leakage, whichever condensate polishing system capacity is 50% （30%） or 100%, action level 2 will be preformed, so 50% （30%） is enough for fresh water cooled units.

关键词： Condensate polishing system water quality operation.

Neutralized solar energetic particles for SEP forecasting:Feasibility study of an innovative technique for space weather applications

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Earth and Planetary Physics 2022年第1期6卷 42-51页

作者： Xiao-Dong Wang B.Klecker G.Nicolaou S.Barabash M.Wieser P.Wurz A.Galli F.Cipriani y.Futaana Swedish Institute of Space Physics KirunaSweden Max-Planck Institute für extraterrestrische Physik GarchingGermany Physics Institute University of BernBernSwitzerland ESA/ESTEC Research and Scientific Support DepartmentNoordwijkThe Netherlands

Energetic neutral atoms(ENAs)are produced by the neutralization of energetic ions formed by shock-accelerated gradual solar energetic particle events(SEP).These high-energy ENAs(HENAs)can reach the Earth earlier than the associated SEPs and thus can provide information about the SEPs at the lower *** HENA properties observed at Earth depend on the properties of the coronal mass ejection(CME)-driven shocks that accelerate the *** a model of HENA production in a shock-accelerated SEP event,we semi-quantitatively investigate the energy-time spectrum of HENAs depending on the width,propagation speed,and direction of the shock,as well as the density and ion abundances of the lower *** to the baseline model parameters,the cases with a wider shock width angle or a higher coronal density would increase the HENA flux observed at the Earth,while the case with an Earthpropagating shock shows a softened HENA *** comparison of expected HENA fluxes in different cases with a flight-proven ENA instrument suggests that solar HENAs can feasibly be monitored with current technologies,which could provide a lead time of 2−3 hours for SEPs at a few *** propose that monitoring of solar HENAs could provide a new method to forecast shock-driven SEP events that are capable of significant space weather impacts on the near-Earth environment.

关键词： solar energetic particles energetic neutral atoms space weather numerical simulation

用MOVPE方法外延生长Si掺杂的立方相GaN(英文)

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发光学报 2001年第S1期22卷 1-4页

作者： WU Jun ZHAO F H Ito y yoshida S Onabe Shiraki y Graduate School of Frontier Science Graduate School of Frontier ScienceYokohama R&D LaboratoryYokohama R&D LaboratoryGraduate School of Frontier ScienceResearch Center for Advanced Science and Technology The University of Tokyo731 HongoBunkyokuToky

用MOVPE方法采取一种两步生长过程生长了未掺杂和Si掺杂的GaN。在生长了一个 2 0nm厚的缓冲层后 ,外延生长了 1 μm厚的立方GaN外延层。利用二次离子质谱测定了掺杂的程度。

关键词： Si掺杂GaN MOVPE 光致发光特性

SyNTHESIS OF TiN By MICROWAVE CARBOTHERMAL REDUCTION OF TiO_2

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Acta Metallurgica Sinica(English Letters) 1998年第4期11卷 291-295页

作者： B.H Liu y Zhang S.X. Ouyang and H.C. Gu (Research Institute of Technical Chemical Physics, East China University of Science and Technology,Shanghai 200237, China)(Department of Materials Physics, University of Science and Technology Beijing, Beijing 10 East China Univ of Science and Technology Shanghai China

Titanium nitride powder was synthesized by microwave carbothermal reduction of titanium oxide. The mechanism and thermal dynamics of the reaction process were studied. The results show that the microwave carbothermal reduction technology has unique advantages over the conventional reduction methods. It can not only lower the reaction temperature, shorten the synthesis cycle, but also refine the product particles,as well as improving the reactivity of the powder.

关键词： TiN microwave carbothermal reduction