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高纤果冻盖膜研制
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作者 江继忠 章卫东 《包装工程》 CAS CSCD 北大核心 2002年第1期55-57,共3页
简要介绍了高纤果冻盖膜的研制着重分析了不满充填高纤果冻杯盖的封合原理 ,并了盖膜的易剥热封与密合层次设计思想。
关键词 高纤果冻 盖膜 易剥热封 密合层 包装 设计 封合原理
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MICROSTRUCTURE AND MAGNETISM OF Co/Ti and Co/Cu(Ni) MULTILAYERS
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作者 吴萍 姜恩永 +1 位作者 崔屾 王怡 《Transactions of Tianjin University》 EI CAS 1999年第2期69-72,共4页
The multilayers in the forms of glass/Cu(Ni)(5.0 nm)/[Co(2.0 nm)/Cu(Ni)(0.5~3.7 nm)] 30 and glass/Ti(5.0 nm)/[Co(2.0 nm)/Ti(0.4~3.5 nm)] 30 ,prepared by dual facing target sputtering at room temperature,exh... The multilayers in the forms of glass/Cu(Ni)(5.0 nm)/[Co(2.0 nm)/Cu(Ni)(0.5~3.7 nm)] 30 and glass/Ti(5.0 nm)/[Co(2.0 nm)/Ti(0.4~3.5 nm)] 30 ,prepared by dual facing target sputtering at room temperature,exhibit a soft magnetic property.The structural and magnetic properties of Co/Cu(Ni) and Co/Ti multilayers were examined as a function of the spacer layer thickness (d Ti and d Cu(Ni) ) by low angle X ray diffraction (LAXRD) and VSM measurements.The saturation magnetization M s of the Co/Ti multilayers was found to decrease with d Ti and approached to a constant value when d Ti was thick enough.But in the Co/Cu(Ni) multilayers,the M s was found to oscillate with d Cu(Ni) when d Cu(Ni) was less than 3.0 nm,and the oscillation period was about 1.0 nm.This arose from the different interlayer magnetic coupling effects.We interpret these two different kinds of interlayer magnetic couplings as the consequence of the competition between the RKKY like and superexchange couplings. 展开更多
关键词 magnetic multilayer interlayer magnetic coupling density of states
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Study of the Influence of the Electrolysis Parameters on Mn-Zn, Mn-Cu and Mn-Cu-Zn Alloys Coatings from Electrolytes Containing Complexing Ligands
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作者 Gigla Tsurtsumia Nana Koiava +4 位作者 David Gogoli Izolda Kakhniashvili Tinatin Lejava Nunu Jokhadze Ermi Kemoklidze 《Journal of Chemistry and Chemical Engineering》 2016年第1期13-27,共15页
The process of obtaining of high quality Mn-Zn, Mn-Cu and Mn-Cu-Zn alloy coatings from complexing ligands--citrate, EDTA (ethylene diaminetetra acetic acid) and nitrilotriacetic acid solutions was studied. Factors a... The process of obtaining of high quality Mn-Zn, Mn-Cu and Mn-Cu-Zn alloy coatings from complexing ligands--citrate, EDTA (ethylene diaminetetra acetic acid) and nitrilotriacetic acid solutions was studied. Factors affecting stability of solutions containing ligand or ligands and influence of electrolysis parameters: electrolyte composition, pH, cathodic current density on chemical composition of the obtained coatings, on their current efficiency, morphology and structure were investigated. 展开更多
关键词 MN-ZN Mn-Cu Mn-Cu-Zn electrodeposition complexing ligands chemical composition current density current efficiency SEM XRD.
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Electrodeposition and characterization of nanocrystalline Fe-Ni-Cr alloy coatings synthesized via pulse current method 被引量:5
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作者 Ebrahim YOUSEFI Ahmad IRANNEJAD Shahriar SHARAFI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第12期2591-2603,共13页
The nanocrystalline Fe-Ni-Cr coatings were electrodeposited by using the pulse current technique.The SEM results showed that the coatings had a mixed morphology of small nodules and fine cauliflower structures at low ... The nanocrystalline Fe-Ni-Cr coatings were electrodeposited by using the pulse current technique.The SEM results showed that the coatings had a mixed morphology of small nodules and fine cauliflower structures at low current densities.Also,the Cr content was increased at expense of Fe and Ni contents at high current densities.XRD patterns confirmed that the pulse current density had a positive effect on the grain refinement.The results of vibrating sample magnetometer(VSM)measurements demonstrated that by increasing the current density,the saturation magnetization was decreased and the coercivity was increased due to the enhancement of Cr content and the reduction of the grain size.The friction coefficient and wear rate values were decreased by increasing the pulse current density.Also,both the adhesive and abrasive wear mechanisms were observed on the worn surfaces.The abrasive grooves and the amount of wear debris were decreased by increasing the pulse current density. 展开更多
关键词 pulse electrodeposition current density nanocrystalline Fe-Ni-Cr coatings magnetic behavior tribological properties
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Study of the Jet-Induced Mixing of Two-Layer Density-Stratified Fluid in a Rectangular Tank
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作者 Shogo Shakouchi Shota Fukue Tomomi Uchiyama 《Journal of Energy and Power Engineering》 2015年第2期117-127,共11页
The mixing phenomena of a two-layer density-stratified fluid induced by a jet in a tank are experimentally investigated. The upper and lower fluids are water and a NaCl-water solution, respectively, with the lower flu... The mixing phenomena of a two-layer density-stratified fluid induced by a jet in a tank are experimentally investigated. The upper and lower fluids are water and a NaCl-water solution, respectively, with the lower fluid issued vertically upward from a nozzle at the bottom of the tank. The jet Reynolds number Re, defined by the jet velocity and the water kinematic viscosity, ranges from 90 to 4,200. The mass concentration of the NaCl-water solution Co is less than 0.08. The flow visualization makes clear the jet behavior relative to the density interface between the upper and lower fluids. The measurement of the concentration distribution of the water paint issued with the jet highlights the effects of Re and Co on the mixing between the jet and the ambient fluid. The measurement of the fluid velocity distribution with a PIV (particle image velocimetry) system successfully elucidates the relationship between the velocity field and the resultant mixing. 展开更多
关键词 JET density-stratified fluid MIXING INTRUSION CONCENTRATION PIV.
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Influence of Neighboring Layers on Interfacial Energy of Adjacent Layers
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作者 Lei-lei Li Shuo Feng 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2019年第6期693-700,I0002,I0009-I0012,共13页
The binding energy and generalized stacking-fault energy (GSFE) are two critical interface properties of two dimensional layered materials, and it is still unclear how neighboring layers affect the interface energy of... The binding energy and generalized stacking-fault energy (GSFE) are two critical interface properties of two dimensional layered materials, and it is still unclear how neighboring layers affect the interface energy of adjacent layers. Here, we investigate the effect of neighboring layers by comparing the differences of binding energy and GSFE between trilayer heterostructures (graphene/graphene/graphene, graphene/graphene/boron nitride,boron nitride/graphene/boron nitride) and bilayer heterostructures (graphene/graphene,graphene/boron nitride) using density functional theory. The binding energy of the adjacent layers changes from -2.3% to 22.55% due to the effect of neighboring layer, with a very small change of the interlayer distance. Neighboring layers also make a change from -2% to 10% change the GSFE, depending on the property of the interface between adjacent layers. In addition, a new simple expression is proven to describe the GSFE landscape of graphene-like structure with high accuracy. 展开更多
关键词 Generalized stacking-fault energy Binding energy Neighboring layers Adjacent layers Density functional theory
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A Few Expanding Integrable Models, Hamiltonian Structures and Constrained Flows 被引量:1
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作者 张玉峰 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第2期273-290,共18页
Two kinds of higher-dimensional Lie algebras and their loop algebras are introduced, for which a few expanding integrable models including the coupling integrable couplings of the Broer-Kaup (BK) hierarchy and the d... Two kinds of higher-dimensional Lie algebras and their loop algebras are introduced, for which a few expanding integrable models including the coupling integrable couplings of the Broer-Kaup (BK) hierarchy and the dispersive long wave (DLW) hierarchy as well as the TB hierarchy are obtained. From the reductions of the coupling integrable couplings, the corresponding coupled integrable couplings of the BK equation, the DLW equation, and the TB equation are obtained, respectively. Especiaily, the coupling integrable coupling of the TB equation reduces to a few integrable couplings of the well-known mKdV equation. The Hamiltonian structures of the coupling integrable couplings of the three kinds of soliton hierarchies are worked out, respectively, by employing the variationai identity. Finally, we decompose the BK hierarchy of evolution equations into x-constrained flows and tn-eonstrained flows whose adjoint representations and the Lax pairs are given. 展开更多
关键词 Lie algebras Broer-Kaup hierarchy dispersive long wave hierarchy constrained flow
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Numerical Study of the Mixing of Density-Stratified Fluid with a Jet
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作者 Shogo Shakouchi Seiji Shimada Tomomi Uchiyama 《Journal of Mechanics Engineering and Automation》 2014年第10期789-798,共10页
Density stratification of LNG (liquefied natural gas) is produced in a storage tank when one LNG is loaded on top of another LNG in the same tank. Mixing LNG by a jet issued from a nozzle on the tank wall is conside... Density stratification of LNG (liquefied natural gas) is produced in a storage tank when one LNG is loaded on top of another LNG in the same tank. Mixing LNG by a jet issued from a nozzle on the tank wall is considered to a promising technique to prevent and eliminate stratification in LNG storage tanks. This study is concerned with the numerical simulation of a jet flow issued into a two-layer density-stratified fluid in a tank and the resultant mixing phenomena. The jet behavior was investigated with the laboratory-based experiment of the authors' previous study. A numerical method proposed by the authors is employed for the simulation. The upper and lower fluids are water and a NaCl-water solution, respectively, and the lower fluid is issued vertically upward from a nozzle on the bottom of the tank. The Reynolds number (Re) defined by the jet velocity and the nozzle diameter ranges from 95 to 2,378, and the mass concentration of the NaCl-water solution Co is set at 0.02 and 0.04. The simulation highlights the jet-induced mixing between the upper and lower fluids. It also clarifies the effects of Re and C0 on the height and horizontal spread of the jet. 展开更多
关键词 MIXING density-stratified fluid JET CFD (computational fluid dynamics) internal density current.
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Ergodic secrecy capacity of MRC/SC in single-input multiple-output wiretap systems with imperfect channel state information 被引量:2
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作者 Hui ZHAO You-yu TAN +1 位作者 Gao-feng PAN Yun-fei CHEN 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2017年第4期578-590,共13页
This paper investigates the secrecy performance of maximal ratio combining (MRC) and selection combining (SC) with imperfect channel state information (CSI) in the physical layer. In a single-input multiple- out... This paper investigates the secrecy performance of maximal ratio combining (MRC) and selection combining (SC) with imperfect channel state information (CSI) in the physical layer. In a single-input multiple- output (SIMO) wiretap channel, a source transmits confidential messages to the destination equipped with M antennas using the MRC/SC scheme to process the received multiple signals. An eavesdropper equipped with N antennas also adopts the MRC/SC scheme to promote successful eavesdropping. We derive the exact and asymptotic closed-form expressions for the ergodic secrecy capacity (ESC) in two cases: (1) MRC with weighting errors, and (2) SC with outdated CSI. Moreover, two important indicators, namely high signal-to-noise ratio (SNR) slope and high SNR power offset, which govern ESC at the high SNR region, are derived. Finally, simulations are conducted to validate the accuracy of our proposed analytical models. Results indicate that ESC rises with the increase of the number of antennas and the received SNR at the destination, and fades with the increase of those at the eavesdropper. Another finding is that the high SNR slope is constant, while the high SNR power offset is correlated with the number of antennas at both the destination and the eavesdropper. 展开更多
关键词 Ergodic secrecy capacity (ESC) Mmximal ratio combining (MRC) Weighting errors Physical layer security Selection combining (SC) Single-input multiple-output (SIMO)
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Dynamics of dense spin ensemble excited in a barrier layer and detected in a well 被引量:1
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作者 SHEN Chao WANG LiGuo +1 位作者 ZHU Hui ZHENG HouZhi 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第6期1108-1111,共4页
Photoluminescence (PL) polarization of a spin ensemble was examined over a wide excitation wavelength range from 520 nm to 700 nm and a temperature range from 3.5 K to 300 K after it transfers from a (AlGa)As barrier ... Photoluminescence (PL) polarization of a spin ensemble was examined over a wide excitation wavelength range from 520 nm to 700 nm and a temperature range from 3.5 K to 300 K after it transfers from a (AlGa)As barrier layer and eventually quenches irradiatively in a GaAs quantum well (QW).A highest PL circular polarization of 30% can be kept at temperatures up to 120 K,while its room temperature value reaches about 17%.It is found that the main features of the optical spin orientation in bulk Al 0.27 Ga 0.73 As materials can be reproduced in terms of the wavelength dependence of PL polarization degree,as the spin polarized ensemble transfers and relaxes into GaAs QW.The transient of PL polarization degree also indicates that a dense spin ensemble collected from the barrier region is in favor of conserving its polarization in GaAs QW as evidenced by a rising temporal response. 展开更多
关键词 spin polarized transport optical orientation dense spin relaxation quantum well
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Effects of Density and Thickness of Interlayer on RT Instability of Interfaces 被引量:1
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作者 程涛 刘升贵 +3 位作者 刘晓旸 郝耐 滕爱萍 李英骏 《Communications in Theoretical Physics》 SCIE CAS CSCD 2014年第5期649-653,共5页
This work focuses on the characteristics of the Rayleigh-Taylor Instability (RTI) of the interfaces formed by two semi-infinitely distributed fluids and one interlayer. In consideration of the coupling effects betwe... This work focuses on the characteristics of the Rayleigh-Taylor Instability (RTI) of the interfaces formed by two semi-infinitely distributed fluids and one interlayer. In consideration of the coupling effects between the interfaces, the expression of the growth rate is obtained. The result reveals that the instability growth rate depends on the density and thickness of the interlayer. It is found that /f the interlayer thickness is less than 0.6 times of the disturbing wavelength, the coupling effects should be considered. 展开更多
关键词 plasma INSTABILITY interface coupling
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Simultaneously enhanced oxidation resistance and mechanical properties in a novel lightweight Ti_(2)VZrNb_(0.5)-Al_(0.5)high-entropy alloy 被引量:3
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作者 Zibing An Shengcheng Mao +8 位作者 Tao Yang Yinong Liu Yanhui Chen Xiaomeng Yang Shanshan Liu Xin Wang Qingsong Deng Ze Zhang Xiaodong Han 《Science China Materials》 SCIE EI CAS CSCD 2022年第10期2842-2849,共8页
Enhanced oxidation resistance is a primary demand for the application of refractory high-entropy alloys(RHEAs)at elevated temperatures.In this study,Al was added to a Ti_(2)VZrNb RHEA to partially substitute Nb to imp... Enhanced oxidation resistance is a primary demand for the application of refractory high-entropy alloys(RHEAs)at elevated temperatures.In this study,Al was added to a Ti_(2)VZrNb RHEA to partially substitute Nb to improve its oxidation resistance and mechanical properties.The alloy was found to have an increased oxidation resistance by forming a continuous Al_(2)O_(3)+ZrO_(2)oxide protective surface.At the same time,the room-temperature yield strength was also increased by 66%to 1273 MPa via solid solution strengthening.The low atomic mass of Al also helped to reduce the density of the alloy by 8.2%to 5.44 g cm^(−3).This resulted in a high specific yield strength of 234 MPa cm3 g^(−1) for the alloy.Meanwhile,the Ti_(2)VZrNb_(0.5)-Al_(0.5)alloy also exhibited a high compressive plasticity of>50%.These values are among the best reported so far for RHEAs. 展开更多
关键词 high-entropy alloy mechanical property oxidation resistance STRENGTH PLASTICITY
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