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Effect of trace yttrium on the microstructure,mechanical property and corrosion behavior of homogenized Mg-2Zn-0.1Mn-0.3Ca-xY biological magnesium alloy

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International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1746-1754页

作者： Mingfan Qi Liangyu Wei Yuzhao Xu Jin wang Aisen Liu Bing Hao jicheng wang Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Center International Group Co. Ltd.Beijing 100176China Zhuhai Runxingtai Electric Co. Ltd.Zhuhai 591000China

The effects of trace yttrium(Y)element on the microstructure,mechanical properties,and corrosion resistance of Mg-2Zn-0.1Mn-0.3Ca-xY(x=0,0.1,0.2,0.3)biological magnesium alloys are *** show that grain size decreases from 310 to 144µm when Y content increases from 0wt%to 0.3wt%.At the same time,volume fraction of the second phase increases from 0.4%to 6.0%,yield strength of the alloy continues to increase,and ultimate tensile strength and elongation decrease initially and then *** the Y content increases to 0.3wt%,Mg_(3)Zn_(6)Y phase begins to precipitate in the alloy;thus,the alloy exhibits the most excellent mechanical *** this time,its ultimate tensile strength,yield strength,and elongation are 119 MPa,69 MPa,and 9.1%,*** addition,when the Y content is 0.3wt%,the alloy shows the best corrosion resistance in the simulated body fluid(SBF).This investigation has revealed that the improvement of mechanical properties and corrosion resistance is mainly attributed to the grain refinement and the precipitated Mg_(3)Zn_(6)Y phase.

关键词： trace yttrium biological magnesium alloy Mg_(3)Zn_(6)Y microstructure mechanical property corrosion behavior

Hydrogen sulfide (H_(2)S) signaling in plant development and stress responses

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aBIOTECH 2021年第1期2卷 32-63页

作者： Hai Liu jicheng wang Jianhao Liu Tong Liu Shaowu Xue College of Life Science and Technology Huazhong Agricultural UniversityWuhan 430070China

Hydrogen sulfide(H_(2)S)was initially recognized as a toxic gas and its biological functions in mammalian cells have been gradually discovered during the past *** the latest decade,numerous studies have revealed that H_(2)S has versatile functions in plants as *** this review,we summarize H_(2)Smediated sulfur metabolic pathways,as well as the progress in the recognition of its biological functions in plant growth and development,particularly its physiological functions in biotic and abiotic stress *** direct chemical reactions,nitric oxide(NO)and hydrogen peroxide(H_(2)O2)have complex relationships with H_(2)S in plant signaling,both of which mediate protein post-translational modification(PTM)to attack the cysteine *** also discuss recent progress in the research on the three types of PTMs and their biological functions in ***,we propose the relevant issues that need to be addressed in the future research.

关键词： stress sulfide versatile

Qubit-qubit quantum coherence mediated by an epsilon-near-zero waveguide

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Communications in Theoretical Physics 2024年第12期76卷 52-61页

作者： Zhenhua Yin jicheng wang Yueke wang Yun Zhu Mengmeng Li Sergei Khakhomov Zheng-Da Hu School of Science Jiangnan University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Department of Communication Engineering Nanjing University of Science and Technology Departments of Optics and General Physics Francisk Skorina Gomel State University

Quantum coherence, as a more general quantum resource compared to quantum entanglement,has attracted increasing attention over recent years. Establishing stable quantum coherence is crucial for implementing reliable quantum information tasks. In this study, we propose a scheme to generate stable quantum coherence of two qubits via an epsilon-near-zero（ENZ） *** find that employing Si3N4rather than SiO2results in stronger qubit-qubit coupling and maximal quantum coherence in a certain range. We derive analytical expressions for both quantum coherence and quantum entanglement, allowing for direct comparison within a unified framework. To achieve stable quantum coherence, classical field driving is introduced. We find that stable coherence is much larger and easier mediated than that of stable entanglement. Our work contributes to the creation of a new stable quantum resource via an ENZ waveguide.

关键词： dyadic Green’s function epsilon-near-zero waveguide metamaterial quantum coherence quantum entanglement

Synchronously Improving the Thermal Conductivity and Mechanical Properties of Al–Si–Fe–Mg–Cu–Zn Alloy Die Castings Through Ultrasonic-Assisted Rheoforming

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Acta Metallurgica Sinica(English Letters) 2021年第10期34卷 1331-1344页

作者： Mingfan Qi Yonglin Kang Jingyuan Li Yuzhao Xu jicheng wang Gunan Li Aisen Liu Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Zhuhai Runxingtai Electric Co. LtdZhuhai 591000China Center International Group Co. LtdBeijing 100176China

An ultrasonic vibration-assisted air-cooled stirring rod process(ACSR+UV)was used to efficiently prepare a large-volume semisolid slurry with a mass of more than 40 kg.A low-cost Al–Si–Fe–Mg–Cu–Zn die-casted alloy with high thermal conductivity,high plasticity and medium strength was *** alloy was used to manufacture large,thin-walled parts for 5 G base stations by using the ACSR+UV rheological die-casting(ACSR+UV R-DC)*** were performed on the microstructure,porosity,mechanical properties,fracture behaviour and thermal conductivity of the ACSR+UV R-DC alloy,which was then compared to traditionally die-casted(T-DC)and ACSR R-DC *** mechanisms for the microstructural refinement and enhancement of the mechanical and thermal conductivity performances of the ACSR+UV R-DC alloy were also *** results showed that the ACSR+UV process increased the nucleation rate of the melt due to the increase in the nucleation area and the generation of cavitation bubbles.A radial-and an axial-forced convection was also generated inside the melt under the combined effects of acoustic flow and mechanical stirring,thereby homogenising the melt composition field and the temperature ***,the ACSR+UV R-DC process not only refined the primaryα-Al(α_(1)-Al),the eutectic silicon and the secondaryα-Al(α_(2)-Al),but also greatly improved the morphology and the distribution of the β-Al5FeSi *** mechanical properties of the ACSR+UV R-DC alloy were higher than those of the T-DC and the ACSR R-DC *** to the T-DC alloy,the ultimate tensile strength,elongation and yield strength of the ACSR+UV R-DC alloy were increased by 34%,122%and 19%,*** was because the ACSR+UV R-DC technique gave the alloy the characteristics of high density,fine sphericalα1-Al grain and a fine and uniform β-phase,which improved the fracture behaviour of the *** thermal conductivity of the ACSR+UV R-DC alloy was 184 W/(m K),which was 10.2%a

关键词： Rheological die-casting Ultrasonic vibration Al–Si–Fe–Mg–Cu–Zn alloy Mechanical properties Thermal conductivity

Impacts of low-order aberrations on capacity of orbital-angular-momentum quantum states

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Communications in Theoretical Physics 2023年第5期75卷 97-103页

作者： Zheng-Da Hu jicheng wang Yun Zhu Mengmeng Li Sergei Khakhomov Igor Semchenko Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology School of ScienceJiangnan UniversityWuxi 214122China Department of Communication Engineering Nanjing University of Science and TechnologyNanjing 210000China Departments of Optics and General Physics Francisk Skorina Gomel State UniversitySovetskaya Str.104Gomel 246019Belarus

We use Hypergeometric Gaussian-II(HyGG-II)modes to investigate the impacts of non-Kolmogorov atmospheric turbulence on the Holevo channel capacity of a quantum communication *** capacity of HyGG-II modes can be higher than that of Laguerre-Gaussian modes via modulating the hollowness *** influences of low-order turbulence aberrations including tilt,defocus,astigmatism,and coma on the capacity are also ***,tilt aberration dominates among all low-order aberrations and defocus and astigmatism aberrations are always *** contrast,the effect of coma aberration can be enhanced to be non-negligible when the turbulence strength or the channel zenith angle is *** also show that only the total and tilt aberrations are sensitive to the non-Kolmogorov power-law *** results may contribute to the quantum optical communication as well as aberration compensation in turbulent channels utilizing the novel family of vortex beams.

关键词： atmospheric turbulence orbital angular momentum hypergeometric-Gaussian-II beam Holevo channel capacity

Early development of Chondrus ocellatus Holm(Gigartinaceae,Rhodophyta)

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Chinese Journal of Oceanology and Limnology 2006年第2期24卷 129-133页

作者： wang Aihua wang jicheng DUAN Delin Institute of Oceanology The Chinese Academy of Sciences Qingdao 266071China The Graduate School of the Chinese Academy of Sciences Beijing 100039China

Chondrus is an economically important red algae widely used for food and biochemical *** early development is crucial for the culture and seedling *** chose tetraspores and carpospores of Chondrus ocellatus as examples for experiment of the culture,induction and release in laboratory condition,aiming to understand early development of *** and to apply in seedling *** *** were collected in Qingdao,China,from *** *** the gametophyte and tetrasporophyte were brushed and washed with sterilized seawater,the algal materials were treated in 1.5%KI for 20 min,then were dried for lh to stimulate the releasing of *** the spores released overnight,it were cultured in PES medium,incubated at 18℃,10±2μmol/(m^(2).s^(1))in 12:12h(light:dark).The observation and recording under microscope were carried *** observation of the early development showed that both tetraspore and carpospore are similar to each *** general,three stages of the early development were shown being division,discoid crust and seedling *** the division stage,the most obvious feature was the increasing of cell number;during the discoid crust stage,the discoid crust had a three-dimensional axis,and it began to differentiate into two types of cells:the basal cells and the apical cells;and to the seedling stage,several protuberances-like appeared on the discoid crusts and formed juvenile *** and tetraspores exhibited a similar development process that included division stage,discoid crust stage and seedling stage.

关键词： Chondrus ocellatus early development carpospore tetraspore discoid crust seedlings

Giant Broadband One Way Transmission Based on Directional Mie Scattering and Asymmetric Grating Diffraction Effects

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Chinese Physics Letters 2020年第4期37卷 57-61页

作者： Xuannan Wu Guanwen Yuan Rui Zhu jicheng wang Fuhua Gao Feiliang Chen Yidong Hou College of Physics Sichuan UniversityChengdu 610064 Microsystem and Terahertz Research Center China Academy of Engineering PhysicsChengdu 610299 School of Science Jiangnan UniversityWuxi 214122 Key Laboratory of High Energy Density Physics(Ministry of Education) Sichuan UniversityChengdu 610064

High performance optical diode-like devices are highly desired in future practical nano-photonic devices with strong directional *** demonstrate a kind of giant broadband reciprocity optical diode-like devices by simultaneously using the directional Mie scattering effect and the asymmetric grating diffraction *** maximum asymmetric subtraction and the asymmetric transmission ratio can reach nearly 100%and 40dB at specified wavelength,*** a wide waveband from 500nm to 800nm,the asymmetric subtraction and the ratio keep larger than 80%and 3.5 dB,respectively,even under oblique *** the best of our knowledge,this is the best one-way-transmission effect observed in the reciprocity optical diode-like *** addition,we further demonstrate that this one-way-transmission effect can bring an effective absorption enhancement on gold *** giant,broadband and angle-insensitive one-way-transmission effect demonstrated here is far beyond the well-known anti-reflection effect in the light-trapping devices and will bring new design philosophy for nano-photonic devices.

关键词： scattering effect directional

Information Service Model with Mobile Agent Supported

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Journal of Computer Science & Technology 2000年第2期15卷 150-157页

作者：邹涛王继成张福炎 Department of Computer Science and Technology Nanjing P.R. China

Mobile Agent is a kind of novel agent technology characterized by mobile, intelligent, parallel and asynchronous computing. In this paper, a new information service model that adopts mobile agent technology is introduced first, and then an experimental system DOLTRIA system that is implemented based on the model is described. The DOLTRIA system implemented by WWW framework and Java can search for relevant HTML documents on a set of Web servers. The result of experiments shows that performance implemented can be achieved by this model, and both the elapsed time and network traffic are reduced significantly.

关键词： agent mobile agent information service client/server Java

High-Performance Quality Factor Based Sensor With Diagonal Cylinder Metasurface of the Bound State in the Continuum

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Photonic Sensors 2023年第2期13卷 89-98页

作者： Yuxuan CHEN Yuke LI Zhengda HU Zexiang wang Zhenxing LI jicheng wang School of Science Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and TechnologyJiangnan UniversityWuxi 214122China State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China

High-quality-factor(high-Q-factor)electromagnetic resonance plays an important role in sensor *** proposed gas refractive index sensors are often limited by the large cavity length or microscale fabrication process in practical ***,ultra-high Q factor resonance based on the bound state in the continuum(BIC)has provided a feasible approach to solve these *** this paper,we propose a metasurface structure consisting of a single size tetramer *** supports dual band toroidal dipole(TD)resonances driven by *** physical mechanism of double TD resonances is clarified by the multipole decomposition of the metasurface band structure and far-field scattering *** sensor structure based on this achieves a sensitivity of 518.3 MHz/RIU,and the maximum line width does not exceed *** high-Q-factor electromagnetic resonance has the advantages of polarization independence and simplicity to *** findings will open up an avenue to develop the ultrasensitive sensor in the gigahertz regime.

关键词： Metasurfaces bound state in the continuum toroidal dipole