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中国科学技术大学学报 2016年第4期46卷 331-336页

作者：无 KOROL a.a. cmd-3和snd合作组布德克尔核物理研究所俄罗斯新西伯利亚630090 新西伯利亚州立大学俄罗斯新西伯利亚630090

利用正负电子对撞机VEPP-2000上SND和CMD-3探测器从2011至2012年获取的对撞数据,给出了从产生阈值到2GeV能区e^+e^-nn和e^+e^-→pp的实验结果.同时,讨论了核子的电磁形状因子,并对结果的改进进行了展望.

关键词：质子中子电磁形状因子正负电子淹没 SND CMD-3

Laminar Forced Convection in Curved Channel with Vortex Structures

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Journal of Thermal Science 2004年第2期13卷 143-149,162页

作者： a.a. AVRAMENKO S.G. KOBZAR I.V. SHEVCHUK A.V. KUZNETSOV B.I. BASOK Institute of Engineering Thermophysics National Academy of SciencesKievUkraine Center for Energy Research National University of MexicoAp.P.3462580TemixcoMor.Mexico Dept.of Mechanical and Aerospace Engineering North Carolina State UniversityCampus Box 7910RaleighNC 27606-7910USA

Theoretical and experimental investigations of heat transfer in flat curvilinear channel have been carried out. Linear and non-linear effects of Dean vortexes on intensity of heat transfer were taken into account. The linear effect, which describe harmonic (sinuous) variation of the heat transfer coefficient near the concave surface of the channel and the non-linear effect causes the general increase of the heat transfer coefficient due to augmentation of heat transfer engendered by the Dean vortexes. For both effects, mathematical relations were obtained in the form of quadratures. These numerical results were modified to the form convenient in engineering calculations. The investigations have shown that both linear and nonlinear components grow up with the Dean number. Nonlinear component Q0T increases more abruptly, while the linear one Q1T is more conservative. This is a confirmation of stability of vortex structures.

关键词： heat transfer Dean vortexes curvilinear channel quadrature.

Effects of small additions of Zn on the microstructure, mechanical properties and corrosion resistance of WE43B Mg alloys

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International Journal of Minerals,Metallurgy and Materials 2019年第7期26卷 858-868页

作者： A.V. Koltygin V.E. Bazhenov R.S. Khasenova.a.A. Komissarov A.I. Bazlov V.A. Bautin Foundry Department National University of Science and Technology “MISiS” Moscow 119049 Russia Laboratory of Hybrid Nanostructured Materials National University of Science and Technology “MISiS” Moscow 119049 Russia Laboratory of Advanced Green Materials National University of Science and Technology “MISiS” Moscow 119049 Russia Department of Metallurgy Steel New Production Technologies and Protection of Metals National University of Science and Technology “MISiS” Moscow 119049 Russia

Zn is a commonly used alloying element for Mg alloys owing to its beneficial effects on mechanical properties. To improve the mechanical and corrosion properties of WE43B Mg alloys, the effects of 0–0.7wt% Zn addition on the microstructure and properties of sample alloys were investigated. Addition of Zn to as-cast WE43B alloy promoted the formation of the Mg12Nd phase;by contrast, after T6 heat treatment, the phase composition of WE43B alloys with and without Zn addition remained mostly the same. A long-period stacking ordered phase was predicted by CALPHAD calculation, but this phase was not observed in either the as-cast or heat-treated Zn-containing WE43B alloys. The optimum temperature and duration of T6 heat treatment were obtained using CALPHAD calculations and hardness measurements. Addition of Zn resulted in a slight reduction in the average grain size of the as-cast and T6 heat-treated WE43B alloys and endowed them with increased corrosion resistance with little effect on their mechanical properties.

关键词： magnesium alloys corrosion resistance mechanical properties Zn addition

Expansion Plans for the Port of Durban： What Are the Issues for the City of Durban？

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Journal of Shipping and Ocean Engineering 2011年第1期1卷 30-45页

作者： a.a. Mather e Thekwini Municipality Durban 4000 South Africa Centre for Environmental Coastal and Hydrological Engineering School of Civil Engineering University of KwaZulu-NatalDurban 4000 South Africa

The Port of Durban is one of the largest ports in the Southern Hemisphere and is the main port for the Southern African region. However, the port is reaching its ca.a.ity limit and it is apparent that for South Africa＇s economic growth this port needs to expand. In order to expand the port needs to not only expand its waterside infrastructure but it would need to provide new logistics corridors though the city of Durban. The city of Durban has completely surrounded the port making expansion options difficult and intertwined with the planning of the city. This paper examines the various options and timelines for port expansion as well as the issues from the city perspective. Areas of possible conflict in this process revolve around traffic ca.a.ity and related road/rail infrastructure, environmental issues, social and economic impacts.

关键词： Port planning city planning containerization Durban shipbuilding.

MIDDLE PROTEROZOIC ACTIVITY (PROTOACTIVITY) AND THE RELATED STRUCTURES IN SIBERIAN AND CHINA-KOREA PLATFORMS

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Geotectonica et Metallogenia 1994年第Z2期18卷 6-7页

作者： BUKHAROV a.a. InstituteoftheEarth'sCrust RussianAcad.Sci.SiberianBranchIrkutsk664033Russin

Economic Dispatch with Convex and Non-Convex Fuel Cost Functions Including Line Losses Using Pattern Search

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Journal of Energy and Power Engineering 2011年第12期5卷 1187-1192页

作者： a.a. El-Fergany Department of Electrical Power and Machines Engineering Faculty of Engineering Zagazig University Zagazig 44519 Egypt

This article presents an application of generalized pattern search （PS） algorithm to solve economic load dispatch （ELD） problems with convex and non-convex fuel cost objective functions. Main objective of ELI） is to determine the most economic generating dispatch required to satisfy the predicted load demands including line losses. Relaxing various equality and inequality constraints are considered. The unit operation minhnum/maximum constraints, effects of valve-point and line losses are considered for the practical applications. Several case studies were tested and verified, which indicate an improvement in total fuel cost savings. The robustness of the proposed PS method have been assessed and investigated through intensive comparisons with reported results in recent researches. The results are very encouraging and suggesting that PS may be very useful tool in solving power system ELD problems.

关键词： Pattern search (PS) economic load dispatch valve-point effects optimal solution.

WO3 nanomaterials synthesized via.a.sol-gel method and calcination for use as a CO gas sensor

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Frontiers of Chemical Science and Engineering 2014年第2期8卷 179-187页

作者： Diah SUSANTI a.a. Gede Pradnya.a.DIPUTRA Lucky Ta.a.TA Hariyati PURWANINGSIH George Endri KUSUMA Chenhao WANG Shaoju SHIH Yingsheng HUANG Department of Materials and Metallurgical Engineering Institut Teknologi Sepuluh Nopember (ITS) Surabaya 60111 Indonesia Department of Mechanical Engineering Surabaya State Shipbuilding Polytechnic Institut Teknologi Sepuluh Nopember (ITS) Surabaya 60111 Indonesia Department of Materials Science and Engineering National Taiwan University of Science and Technology (NTUST) Taipei 10607 Taiwan China Department of Electronic Engineering National Taiwan University of Science and Technology (NTUST) Taipei 10607 Taiwan China

Carbon monoxide is a poisonous and ha.a.dous gas and sensitive sensor devices are needed to prevent humans from being poisoned by this gas. A CO gas sensor has been prepared from WO3 synthesized by a sol-gel method. The sensor chip was prepared by a spin-coating technique which deposited a thin film of WO3 on an alumina substrate. The chip samples were then calcined at 300, 400, 500 or 600 ℃ for 1 h. The sensitivities of the different sensor chips for CO gas were determined by comparing the changes in electrical resistance in the absence and presence of 50 ppm of CO gas at 200 ℃. The WO3 calcined at 500 ℃ had the highest sensitivity. The sensitivity of this sensor was also measured at CO concentrations of 100 ppm and 200 ppm and at operating temperatures of 30 and 100℃. Thermogravimetric a.a.ysis of the WO3 calcined at 500 ℃ indicated that this sample had the highest gas adsorption ca.a.ity. This preliminary research has shown that WO3 can serve as a CO gas sensor and that is should be further explored and developed.

关键词： WO3 nanomaterial sol-gel calcinations COgas sensor sensitivity

Prepa.a.ion of a spheroidized W-Cu pseudo-alloy micropowder with a sub-micrometer particle structure using plasma technology

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Transactions of Nonferrous Metals Society of China 2023年

作者： A.V. Samokhin N.V. Alekseev a.a. Dorofeev a.a. Fadeev M.A. Sinayskiy I.D. Zavertiaev Y.V. Grigoriev Institute of Metallurgy and Materials Science， Russian a.a.emy of Sciences 2. Federal Scientific Research Center "Crystallography and Photonics"， Russian a.a.emy of Sciences

The possibility for obtaining of composite micropowders of the W-Cu system with spherical particles having sub-microscale/nanoscale internal structure was confirmed and studied using the complex multistage approach. Composite W-Cu nanoparticles with core–shell structure (W cores and Cu shells) were produced in plasmochemical synthesis by the first stage. Further spray-drying of the aqueous suspension of the W-Cu nanopowder with sucrose enabled the formation of 25–63 μm microgranules with a yield of 50%. The last step was treatment of the nanopowder microgranules by a thermal plasma jet， which ensured the production of dense spherical W-Cu particles. The final powder had a 90%–95% spheroidization degree， up to 8.1 g/cm3bulk density and a flowability of ～12 s/50 g. The content of impurities in the resulting spherical micropowder did not exceed 0.7 wt.% [O]， 0.02–0.2 wt.% [C] and 0.03-0.05 wt.% [H].

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Synthesis and reactions of 4-aryl-1(2H) phtha.a.inones

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Chinese Journal of Chemistry 1991年第1期9卷 45-53页

作者： SAYED,M.A. ISLAM,I. MOHAMED,a.a. SOLIMAN,A.Y. BAKEER,H.M. Department of Chemistry Faculty of ScienceAin Shams and El-Azher UniversitiesEgypt Department of Chemistry Faculty of Education at FayoumCairo UniversityEgypt

The behavior of 4-aryl-1(2H)-phtha.a.inones (1a-c) toward some electrophilic and nucleophilic reagents has been described with the aim of preparing some new phtha.a.inone deriva- tives of the expected pharmacological ... 详细信息

关键词： Synthesis and reactions of 4-aryl-1 phtha.a.inones

Some reactions of 4-aryl-1 (2H)-phtha.a.inones

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Chinese Journal of Chemistry 1990年第6期8卷 549-554页

作者： SOLIMAN A.Y. BAKEER H.M. SAYED M.A. ISLAM I. MOHAMED a.a. Department of Chemistry Faculty of EducationFayoumEgypt Faculty of Science Ain Shams UniversityCairoEgypt Faculty of Science El-Azher UniversityCairoEgypt

The behayiors of 4-aryl-1 (2H)-phtha.a.inones (1a-c)toward carbon nucleophiles (Grignard reagents) and secondary amine under Mannich conditions as well as the nucleophilic substitution reaction on chlorophtha.a.ine de... 详细信息

关键词： OC Some reactions of 4-aryl-1 phtha.a.inones