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RElIABIlITY ANAlYSIS FOR AN AERO ENGINE TURBINE DISK UNDER lOW CYClE FATIGUE CONDITION

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Acta Metallurgica Sinica(English letters) 2004年第4期17卷 514-520页

作者： C.l.liu Z.Z.lü Y.l.Xu School of Aviation Northwestern Polytechnical University Xi'an 710072 ChinaSchool of Aviation Northwestern Polytechnical University Xi'an 710072 ChinaChina Aviation Research Institute 608 Zhuzhou 412002 China

Reliability analysis methods based on the linear damage accumulation law (lDAl) and load-life interference model are studied in this paper. According to the equal probability rule, the equivalent loads are derived, and the reliability analysis method based on load-life interference model and recurrence formula is constructed. In conjunction with finite element analysis (FEA) program, the reliability of an aero engine turbine disk under low cycle fatigue (lCF) condition has been analyzed. The results show the turbine disk is safety and the above reliability analysis methods are feasible.

关键词： low cycle fatigue life reliability analysis load-life interference model recurrence method aero engine turbine disk

Utilization of α-olefins obtained by pyrolysis of waste high density polyethylene to synthesize α-olefin-succinic-anhydride based cold flow improvers

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燃料化学学报 2009年第3期37卷 302-310页

作者： Norbert MISKOlCZI Richard SAGI lászló BARTHA lívia FORCEK University of Pannonia Chemical Engineering and Process Engineering Institute Department of Hydrocarbon and Coal Processing Egyetem street 10 Veszprém H-8200 HUNGARY

浪费聚合物热分解获得的石蜡富人烃部分的利用的一条新线路被调查。-olefin-succinic-anhydride 基于中介倒点镇静剂添加剂因为柴油被综合，在哪个反应需要的石蜡被废物的热分解获得高密度的聚乙烯(HDPE ) 。石蜡的部分被塑料废物的de... 详细信息

浪费聚合物热分解获得的石蜡富人烃部分的利用的一条新线路被调查。-olefin-succinic-anhydride 基于中介倒点镇静剂添加剂因为柴油被综合，在哪个反应需要的石蜡被废物的热分解获得高密度的聚乙烯(HDPE ) 。石蜡的部分被塑料废物的de聚合在 500 滓鲥?在一个试管反应堆生产???????????????????????禧?????迋????骤??????吗鲥??????禧哉????嫪????滓?????篤?廯??????可??????????????裍??妢???????臙???????蚨?蚨？？

关键词：添加剂石油炼制成份燃料化学高温分解

Hölder,Sobolev,weak-type and BMO estimates in mixed-norm with weights for parabolic equations

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Science China Mathematics 2021年第1期64卷 129-154页

作者： Pablo Raúl Stinga José l.Torrea Department of Mathematics Iowa State UniversityAmesIA50011USA Departamento de Matemáticas Universidad Autónoma de MadridMadrid28049Spain

We prove weighted mixed-norm lqt(W2,px)and lqt(C2,αx)estimates for 10,x∈Rn.x∈Rn,The coefficients a(t)=(aij(t))are just bounded,measurable,symmetric and uniformly ***,we show strong,weak type and BMO-Sobolev estimat... 详细信息

We prove weighted mixed-norm lqt(W2,px)and lqt(C2,αx)estimates for 1l∞t(lpx)−BMOt(W2,px)and l∞t(Cαx)−BMOt(C2,xx),and *** formulas for derivatives,for the solutions u=u(t,x)to parabolic equations of the form∂tu−aij(t)∂iju+u=f,t∈,x∈n and for the Cauchy problem{∂tv−aij(t)∂ijv+v=fv(0,x)forfort>0,x∈Rn.x∈Rn,The coefficients a(t)=(aij(t))are just bounded,measurable,symmetric and uniformly ***,we show strong,weak type and BMO-Sobolev estimates with parabolic Muckenhoupt *** is quite remarkable that most of our results are new even for the classical heat equation∂tu−Δu+u=f.

关键词： Calderón-Zygmund parabolic singular integrals weak type and BMO estimates representation formulas parabolic equations mixed-norm Sobolev and Schauder estimates

INFlUENCE OF 2-BUTYNE-1,4-DIOl ON THE STRUCTURE AND PERFORMANCE OF THE Co-Ni AllOY PlATED BY ElECTRODEPOSITION

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Acta Metallurgica Sinica(English letters) 2008年第1期21卷 50-56页

作者： S.l. Wang l.l. Hong W.W. Yu Department of Applied Chemistry College of Materials Science and Engineering Huaqiao University Quanzhou 362021 China

The effect of 2-butyne-1, 4-diol （BD） on the deposition behavior of the Co-Ni alloy was investigated by linear sweep voltammetry. The results showed that BD could prevent the deposition of the Co-Ni alloy. The effect of BD concentration in the sulfate plating bath, on the structure of the Co-Ni deposit was studied by energy dispersive x-ray spectroscopy, scanning electron microscope, and X-ray diffraction, respectively. As a result, BD could smoothen the deposit surface and decrease the diameter of the grain, but too much of BD was not good for the size of the grain. In general, a hexagonal close-packed （hcp） phase of the Co-Ni alloy, with a preferentially oriented （110） plane, was prepared by electrodeposition in the presence of BD. The Co-Ni alloy as a catalyst for the electro-oxidation of ethanol in alkaline medium was investigated by cyclic voltammetry. The deposit plated from the bath containing BD possessed better electro-oxidation of ethanol performance compared with that of the deposit plated from only the sulfate plating bath, but too much of BD was not beneficial for catalytic activity. The Co-Ni film was suitable as a magnetic recording material.

关键词： Co-Ni 2-butyne-1, 4-diol (BD) Electrodeposition Electro-oxidation ethanol Magnetic property

Universal properties of relaxation and diffusion in condensed matter

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Chinese Physics B 2017年第1期26卷 70-85页

作者： K l Ngai State Key laboratory of Metastable Materials Science and Technology. Yanshan University Qinhuangdao 066004 China

By and large the research communities today are not fully aware of the remarkable universality in the dynamic properties of many-body relaxation/diffusion processes manifested in experiments and simulations on condensed matter with diverse chemical compositions and physical structures. I shall demonstrate the universality first from the dynamic processes in glass-forming systems. This is reinforced by strikingly similar properties of different processes in contrasting interacting systems all having nothing to do with glass transition. The examples given here include glass-forming systems of diverse chemical compositions and physical structures, conductivity relaxation of ionic conductors（liquid, glassy, and crystalline）,translation and orientation ordered phase of rigid molecule, and polymer chain dynamics. Universality is also found in the change of dynamics when dimension is reduced to nanometer size in widely different systems. The remarkable universality indicates that many-body relaxation/diffusion is governed by fundamental physics to be unveiled. One candidate is classical chaos on which the coupling model is based, Universal properties predicted by this model are in accord with diverse experiments and simulations.

关键词： many-body relaxation/diffusion universal dynamics coupling model classical chaos

From PAWP to ＂Pop＂： opening,up new pathways to fatherhood

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Asian Journal of Andrology 2015年第3期17卷 443-444页

作者： Melissa l Vadnais George l Gerton Center for Research on Reproduction and Women's Health Perelman School of Medicine University of Pennsylvania Philadelphia PA 19104-6160 USA

Infertility remains a significant problem for many couples. Approximately one in seven couples who attempt to conceive will fail to do so within 1 year. In about 65% of these cases, there is a male component of infertility.1 Despite normal semen parameters, the etiology of infertility remains uncertain in more than 50% of couples.2 Defects in sperm proteins and/ or structures may underlie certain cases of male infertility. Although many men would like to be called ＂Pop＂, ＂Dad＂, or ＂Papa＂, those who are classified with idiopathic male infertility have few options for becoming fathers. Recent studies by Aarabi et al.3 may open the door to new therapies.

关键词： @@

What′s new with the XYZ mesons?

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Chinese Physics C 2008年第6期32卷 455-462页

作者： S.l.Olsen Institute of High Energy Physics Chinese Academy of Sciences

I review some of the recent experimental results on the so-called XYZ mesons.

关键词： charmonium multiquark mesons quark-gluon hybrids

Azo Dye Doped Polymer Films for Nonlinear Optical Applications

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Chinese Journal of Polymer Science 2014年第5期32卷 650-657页

作者： l.Guru Prasad Department of Science & Humanities M.Kumarasamy College of Engineering

Azo dye doped polymer films were prepared on glass substrates using spin-coating technique. FTIR, UV-Vis spectra and Pl measurements were recorded to characterize the structure of the metanil yellow doped PVA films. Surface morphology and thickness of the films were studied using AFM and FESEM. The magnitude of both real and imaginary parts of third-order nonlinear susceptibility χ3 of metanil yellow were determined by the Z-scan technique. The nonlinear refractive index n2 and the nonlinear absorption coefficient β of the azo dye doped polymer films were calculated respectively. The real part of the third-order susceptibility χ3 is much larger than its imaginary part indicating that the third-order optical response of the metanil yellow doped PVA films is dominated by the optical nonlinear refractive behavior.

关键词： Azo dye PVA Nonlinear optical materials.

Detailed Analysis of Quantum Phase Transitions Within the u(2) Algebra

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Communications in Theoretical Physics 2010年第10期54卷 589-593页

作者： l.Fortunato l.Sartori Dipartimento di Fisica“G.Galilei”and INFN the ECT Europen Center for Theoretical Nuclear Physics CISAS G.Colombo

We analyze in detail the quantum phase transitions that arise in models based on the u(2) algebraicdescription for bosonic systems with two types of scalar *** we discuss the quantum phase transition thatoccurs in hamiltonians that admix the two dynamical symmetry chains u(2)  u(1) and u(2)  so(2) by diagonalizingthe problem exactly in the u(1) *** we apply the coherent state formalism to determine the energy *** we show that a quantum phase transition of a different nature, but displaying similar characteristics, may arisealso within a single chain just by including higher order terms in the hamiltonian.

关键词： algebraic models lie algebra quantum phase transitions lipkin model