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sTUDy ON THE REAR CAPACITy OF DEPOsITs UsING ELECTROLEss NICKEL DEPOsITION AND ELECTROPLATE CHROMIUM

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Acta Metallurgica sinica(English Letters) 1999年第5期12卷 777-781页

作者： s.y.hu Collge of Mechanical Engineering, China Agriculture University (East Campus), Beijing 100083, China

The comparison study of the relations between the hardness, wear capacity and heat treatment temperature of the electroless nickel deposition with the electroplating deposits of chromium were conducted .The results showed that the hardness and wear capacity of the electroplate technology were superior than that of electroless in general cases, but with the raising of the heat treatment temperature, the hardness and wear capacity of the samples treated by electroless deposition technology were superior obviously than that of electroplate.

关键词： electroless nickel deposition electroplating chromium wear capacity

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The generation of high-order-Bessel beam in hot atomic Rb sample

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The generation of high-order-Bessel beam in hot atomic Rb sa...

Optimization of chemistry and process parameters for control of intermetallic formation in Mg sludges

第十八届全国量子光学学术会议

作者：胡华杰 s.y.hu D.J.Luo D.Wei 西安交通大学 shaanxi Key Laboratory of Quantum Information and Quantum Optoelectronic Devices Xi'an Jiaotong University

In this work, we generate the high-order-Bessel-like beam using self-phase modulation in hot atomic Rb sample. The hot rubidium atomic sample would make up a diffraction aperture when the sample is illuminated with the Gaussian beam with high power tuned close to the atomic resonances. We demonstrated when a gaussian beam pass through the aperture with approximated gaussian beam size, the diffraction aperture can vary the Gaussian beam into a zero-order Bessel like beam in the far-field with the Fraunhofer diffraction formula. That means we also can get a zero-order Bessel like beam through this method in hot atomic Rb sample. when we change the Gaussian beam with high order Laguerre-gauss beam, the diffraction aperture shaped in the sample transform into a circle which would change its size with the intensity of the beam, then we can get a high-order Bessel like beam through self-phase modulation. We also find this effect has no relationship with the polarization of the beam by using the radial, angular and generalized mixed vector beam to illuminate the sample, we get the corresponding polarization high-order-Bessel beam.

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Journal of Magnesium and Alloys 2024年第4期12卷 1431-1448页

作者： y.Fu G.G.Wang A.hu y.Li K.B.Thacker J.P.Weiler H.hu Department of Mechanical Automotive and Materials EngineeringUniversity of Windsor401 Sunset AveWindsorOntario N9B 3P4Canada Global Technology Centre Meridian Lightweight Technologies25 MacNab AveStrathroyOntario N7G 4H6Canada

Intermetallic formation in sludge during magnesium(Mg)melting,holding and high pressure die casting practices is a very important ***,very often it is overlooked by academia,original equipment manufacturers(OEM),metal ingot producers and even die *** aim of this study was to minimize the intermetallic formation in Mg sludge via the optimization of the chemistry and process *** Al8Mn5 intermetallic particles were identified by the microstructure analysis based on the Al and Mn *** design of experiment(DOE)technique,Taguchi method,was employed to minimize the intermetallic formation in the sludge of Mg alloys with various chemical compositions of Al,Mn,Fe,and different process parameters,holding temperature and holding *** sludge yield(sy)and intermetallic size(Is)was selected as two *** optimum combination of the levels in terms of minimizing the intermetallic formation were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,690℃ for the holding temperature and holding at 30 mins for the holding time,*** best combination for smallest intermetallic size were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,630℃ for the holding temperature and holding at 60 mins for the holding time,*** groups of sludge factors,Chemical sludge(CsF),Physical sludge(PsF)and Comprehensive sludge Factors(and CPsF)were established for prediction of sludge yields and intermetallic sizes in Al-containing Mg *** CPsF with five independent variables including both chemical elements and process parameters gave high accuracy in prediction,as the prediction of the PsF with only the two processing parameters of the melt holding temperature and time showed a relatively large deviation from the experimental *** Chemical sludge Factor was primarily designed for small ingot producers and die casters with a limited melting and holding capacity,of which process parameters could be fixed *** Physical sludge Factor could be used f

关键词： Magnesium sludge Al-Mn intermetallic Optimization Taguchi method sludge factor Chemical composition Process parameter

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Ren-integrable and ren-symmetric integrable systems

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Communications in Theoretical Physics 2024年第3期76卷 62-69页

作者： s y Lou school of Physical science and Technology Ningbo UniversityNingbo315211China

A new type of symmetry,ren-symmetry,describing anyon physics and corresponding topological physics,is ***-symmetry is a generalization of super-symmetry which is widely applied in super-symmetric physics such as super-symmetric quantum mechanics,super-symmetric gravity,super-symmetric string theory,super-symmetric integrable systems and so *** and Grassmann numbers are,in some sense,dual conceptions,and it turns out that these conceptions coincide for the ren situation,that is,a similar conception of ren-number(R-number)is devised for *** particular,some basic results of the R-number and ren-symmetry are exposed which allow one to derive,in principle,some new types of integrable systems including ren-integrable models and ren-symmetric integrable *** examples of ren-integrable KdV-type systems and ren-symmetric KdV equations are explicitly given.

关键词： symmetries integrable systems anyon physics extended supersymmetry ren-symmetry

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采用体素内不相干运动扩散加权成像鉴别强直性脊柱炎与活动性骶髂关节炎

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国际医学放射学杂志 2015年第6期 600-601页

作者： y.H.Zhao s.L.Li Z.y.Liu X.Chen X.C.Zhao s.y.hu 屈瑾 Department of Radiology Guangdong General HospitalGuangdong Academy of Medical Sciences

摘要目的评估体素内不相干运动(IVIM)扩散加权成像鉴别活动性骶髂关节炎及强直性脊柱炎(As)的可行性及价值。方法 41例病人按照As疾病活动指数(BAsDAI)评分

关键词：体素内不相干运动强直性脊柱炎脊椎炎活动性骶髂关节炎加权成像

Effect of Eu3+,Bi3+,and Li+ doping on luminescent property of GdNbO4

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Journal of Rare Earths 2024年第1期42卷 66-75页

作者： s.W.Wi y.s.Lee Department of Physics and Integrative Institute of Basic sciences Soongsil University

We investigated the emission properties of Eu3+-doped GdNbO4-based oxide phosphors,aiming at improving the Eu3+emission by codoping of Bi3+and Li+.Eu3+singly doped,Eu3+and Bi3+doubly doped,and Eu3+,Bi3+,and Li+triply doped GdNbO4were prepared using a high-temperature solid-state reaction *** red-orange emissions from Eu3+in the singly doped samples are significantly improved by the codoping of Bi3+,mainly due to the energy transfer from Bi3+to Eu3+.The additional codoping of Li+is found to increase the Eu3+emission *** improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu3+in GdNbO4does not change significantly with the codoping of Bi3+and Li+.Our results indicate that Li+doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO4phosphors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photoluminescence sensitizer Rare earths

Increasing polymer scission rate by tying an overhand knot

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science China Chemistry 2024年第11期67卷 3498-3499页

作者： yuheng hu Jennifer T.Ou Jim y.huang yuanning Feng Department of Chemistry and Biochemistry The University of Oklahoma

similar to the phenomenon of knotted ropes in life, knotted climbing ropes will reduce their strength due to knots. Although computer simulations [1], theoretical speculation[2,3], and intuition [3] suggest that similar processes may occur at the nanoscale, this hypothesis has not been experimentally proven before. With the increasing maturity of molecular recognition and self-assembly, a research communication by Leigh et al. [4] published in Nature Chemistry introduced a molecular overhand knot into a polymer to study its effect on the scission rate of the polymer chain under tension.

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Decomposition solutions and Bäcklund transformations of the B-type and C-type Kadomtsev-Petviashvili equations

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Communications in Theoretical Physics 2024年第6期76卷 34-44页

作者： Xiazhi Hao s y Lou College of science Zhejiang University of TechnologyHangzhou 310014China school of Physical science and Technology Ningbo UniversityNingbo 315211China

This paper introduces a modified formal variable separation approach,showcasing a systematic and notably straightforward methodology for analyzing the B-type Kadomtsev-Petviashvili(BKP)*** the application of this approach,we successfully ascertain decomposition solutions,Bäcklund transformations,the Lax pair,and the linear superposition solution associated with the aforementioned ***,we expand the utilization of this technique to the C-type Kadomtsev-Petviashvili(CKP)equation,leading to the derivation of decomposition solutions,Bäcklund transformations,and the Lax pair specific to this *** results obtained not only underscore the efficacy of the proposed approach,but also highlight its potential in offering a profound comprehension of integrable behaviors in nonlinear ***,this approach demonstrates an efficient framework for establishing interrelations between diverse systems.

关键词： decomposition solution Backlund transformation Lax pair linear superposition solution

Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/Cds heterojunction with photothermal effect for efficient photocatalytic hydrogen production

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Journal of Materials science & Technology 2024年第4期171卷 1-9页

作者： T.y.huang Z.yang s.y.yang Z.H.Dai y.J.Liu J.H.Liao G.y.Zhong Z.J.Xie y.P.Fang s.s.Zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China school of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China school of Chemical Engineering and Energy Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/Cds heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2D)Cds nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of Cds *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocatalyst Hydrogen evolution