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Heterogeneous integration of 2D materials on Si charge-coupled devices as optical memory

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Science China(Information Sciences) 2024年第6期67卷 190-197页

作者： Zheng BIAN Feng TIAN Zongwen LI Xiangwei SU Tianjiao ZHANG jialei miao Bin YU Yang XU Yuda ZHAO College of Integrated Circuits Hangzhou Global Scientific and Technological Innovation CentreZhejiang University

Optical memory integrates the function of optical sensing in memory devices, remarkably promoting the interconnection between sensory and memory terminals. Silicon charge-coupled photodetectors and floating gate memory have been widely used in imaging and storage technologies, respectively. However,the heterogeneous integration of the two devices requires technological innovation and complex electrical connections. In this work, we adopt a three-dimensional layer stacking method to design a novel optical memory device. On the top of Si charge-coupled photodetectors, we successively deposit two-dimensional graphene,hexagonal boron nitride, and molybdenum disulfide as a floating gate layer, a tunneling layer, and a readout layer, respectively. By applying a gate bias on lightly doped Si, a deep depletion layer is formed with a high voltage potential drop. Under dark conditions, the depletion layer cannot be filled, and the electric field across the h-BN tunnel barrier is relatively small. Under light irradiation, the deep depletion layer is gradually filled, and the h-BN tunneling layer withstands the increasing electric field, resulting in charge storage in the floating gate layer. Based on this mechanism, the device exhibits a gate voltage-dependent operation mode, including an integrated optical sensing-memory mode and an electrically driven storage mode. Under moderate gate voltage, the device can effectively detect the optical information with varied intensity and store the optical information in the floating gate, displaying optically controlled memory characteristics. Our work demonstrates a compact device structure for optical memory and displays excellent optically controlled memory performance, which can be applied in artificial vision systems.

关键词： heterogeneous integration charge-coupled device floating gate optical memory molybdenum disulfide lightly doped silicon

基于绿色施工理念的港区道路软土地基处理技术探讨

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交通节能与环保 2024年第4期20卷 111-113页

作者：蔡江波张晗潘斌苗家磊王培森中建筑港集团有限公司山东青岛266000 山东建筑大学山东济南250000

随着经济与社会的进步,生态环境文明问题日益突出,对绿色施工的要求也越来越高。本文以黄河流域港区道路软基绿色施工为切入点,分析了国内外道路工程绿色施工的现状。通过探讨传统的地基处理方法的适应性以及现场软土的物理力学性能等,... 详细信息

随着经济与社会的进步,生态环境文明问题日益突出,对绿色施工的要求也越来越高。本文以黄河流域港区道路软基绿色施工为切入点,分析了国内外道路工程绿色施工的现状。通过探讨传统的地基处理方法的适应性以及现场软土的物理力学性能等,提出运用碱激发矿渣替代水泥的化学加固法对软土地基进行处理,结果发现有良好的固化效果,符合绿色施工要求且节能环保。

关键词：港区道路软基处理绿色施工矿渣

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Dynamic coefficients and stability analysis of a water-lubricated hydrostatic bearing by solving the uncoupled Reynolds equation

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Chinese Journal of Aeronautics 2020年第8期33卷 2110-2122页

作者： jialei DU Guozhu LIANG School of Astronautics Beihang UniversityBeijing 100083China

This paper concerns the dynamic characteristics of incompressible laminar flow hydrostatic bearings. An improved method based on the mathematical perturbation technique for calculating the stiffness and damping coefficients of hydrostatic bearings is presented;it raises the calculation efficiency by uncoupling the recess flow continuity equations from the solving of the Reynolds equation. The dynamic coefficients of a water-lubricated four-recess hydrostatic bearing are calculated with both the improved method and the conventional method. The comparisons between these two methods validate the effectiveness and correctness of the improved method. Furthermore, the dynamic response and stability characteristics of a rotor supported by the hydrostatic bearing are calculated and compared with experimental results. First, the dynamic responses calculated with the linear and nonlinear bearing dynamic coefficients models show that the linear model is inaccurate if the rotor whirls in a large eccentricity ratio range, owing to the nonlinearity of stiffness and damping. Second, according to the numerical and experimental results, the nonlinearity of bearing stiffness and damping coefficients could induce double rotational frequency component in the unbalance response frequency spectrum. Finally, the numerical results indicate that the stability threshold speed of the bearing increases with eccentricity ratio. The improved method proposed can be used to evaluate the dynamic performance of hydrostatic bearings efficiently, and the bearing characteristics presented could contribute to a better understanding of the performance of waterlubricated hydrostatic bearings.

关键词： Damping Hydrostatic bearing Laminar flow Stability Stiffness Water lubrication

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Ribbon Hopf Superalgebras and Drinfel＇d Double

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Chinese Annals of Mathematics,Series B 2018年第6期39卷 1047-1064页

作者： jialei CHEN Shilin YANG College of Applied Sciences Beijing University of Technology Beijing 100124 China

Finite dimensional ribbon Hopf （super） algebras play an important role in constructing invariants of 3-manifolds. In the present paper, the authors give a necessary and sufficient condition for the Drinfel＇d double of a finite dimensional Hopf superalgebra to have a ribbon element. The criterion can be seen as a generalization of Kauffman and Radford＇s result in the non-super situation to the Z2-graded situation, however, the derivation of the result in the Z2-graded case will be much more complicated.

关键词： Hopf superalgebras Drinfel'd double Ribbon element

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Quantum superalgebras uq（sl（m│n）） at roots of unity

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Frontiers of Mathematics in China 2012年第4期7卷 607-628页

作者： jialei CHEN Shilin YANG Department of Applied Mathematics Beijing University of TechnologyBeijing 100124China

Finite dimensional Hopf superalgebras Uq （sl（m│n）） corresponding to the Lie superalgebras s[（m│n） are constructed. The PBW type basis and the left and right integrals of uq（sl（m│n）） are obtained. Furtherm... 详细信息

关键词： Hopf superalgebra PBW basis automorphism group

Grothendieck rings of a class of Hopf algebras of Kac-Paljutkin type

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Frontiers of Mathematics in China 2021年第1期16卷 29-47页

作者： jialei CHEN Shilin YANG Dingguo WANG College of Mathematics Faculty of ScienceBeijing University of TechnologyBeijing100124China School of Mathematical Sciences Qufu Normal UniversityQufu273165China

We construct the Grothendieck rings of a class of 2n^(2)dimensional semisimple Hopf Algebras H_(2n)^(2),which can be viewed as a generalization of the 8 dimensional Kac-Paljutkin Hopf algebra *** irreducible H_(2n)^(2... 详细信息

关键词： Grothendieck ring Hopf algebra irreducible module

Understanding the interfacial properties of benzene alkylation with 1-dodecene catalyzed by immobilized chloroaluminate ionic liquids using molecular dynamics simulation

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Green Chemical Engineering 2023年第3期4卷 338-345页

作者： Weizhong Zheng jialei Sha Weizhen Sun Ling Zhao State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai200237China

Benzene alkylation catalyzed by immobilized ionic liquids(ILs)on solid carriers is considered as a heterogeneous reaction,in which the interfacial properties play an important ***,the interfacial characteristics between benzene/1-dodecene mixture and immobilized chloroaluminate ILs with different alkyl chain length on the silica substrate were investigated by molecular dynamics *** grafted ILs can obviously promote the enrichment of benzene near the interface,leading to a higher ratio of benzene to dodecene,and the interfacial width increases slightly with increased alkyl chain of grafted *** the same time,the grafted cations can also enhance the benzene diffusion and suppress the dodecene diffusion at the interface,which probably helps to inhibit the inactivation of *** work provides deeply insights into the rational design of novel immo-bilized ILs catalysts for the benzene alkylation.

关键词： Benzene alkylation Interfacial property Molecular dynamics simulation Immobilized ionic liquids

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SLA-driven container consolidation with usage prediction for green cloud computing

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Frontiers of Computer Science 2020年第1期14卷 42-52页

作者： jialei LIU Shangguang WANG Ao ZHOU Jinliang XU Fangchun YANG State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100029China School of Computer and Communication Engineering Zhengzhou University of Light IndustryZhengzhou 450002China

Since service level agreement(SLA)is essentially used to maintain reliable quality of service between cloud providers and clients in cloud environment,there has been a growing effort in reducing power consumption while complying with the SLA by maximizing physical machine(PM)-level utilization and load balancing techniques in infrastructure as a ***,with the recent introduction of container as a service by cloud providers,containers are increasingly popular and will become the major deployment model in the cloud environment and specifically in platform as a ***,reducing power consumption while complying with the SLA at virtual machine(VM)-level becomes *** this context,we exploit a container consolidation scheme with usage prediction to achieve the above *** obtain a reliable characterization of overutilized and underutilized PMs,our scheme jointly exploits the current and predicted CPU utilization based on local history of the considered PMs in the process of the container *** demonstrate our solution through simulations on real *** experimental results show that the container consolidation scheme with usage prediction reduces the power consumption,number of container migrations,and average number of active VMs while complying with the SLA.

关键词： container consolidation service level agreement power consumption usage prediction

ATI: Assemble topological interaction overcomes consistency– cohesion trade‐off in bird flocking

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IET Cyber-Systems and Robotics 2024年第2期6卷 67-80页

作者： jialei Huang Bo Zhu Tianjiang Hu School of Aeronautics and Astronautics Sun Yatsen UniversityGuangzhouChina School of Artificial Intelligence Sun Yat‐sen UniversityGuangzhouChina

In nature,various animal groups like bird flocks display proficient collective navigation achieved by maintaining high consistency and cohesion *** metric and topological interactions have been explored to ensure high consistency among *** topological interactions found in bird flocks are more cohesive than metric in-teractions against external perturbations,especially the spatially balanced topological interaction(SBTI).However,it is revealed that in complex environments,pursuing cohesion via existing interactions compromises *** authors introduce an innovative solution,assemble topological interaction,to address this ***-trasting with static interaction rules,the new interaction empowers individuals with self-awareness to adapt to the complex environment by switching between interactions through visual *** individuals employ high-consistency k-nearest topological interaction when not facing splitting *** the presence of such threats,some switch to the high-cohesion SBTI to avert *** assemble topological interaction thus transcends the limit of the trade-off between consistency and *** addition,by comparing groups with varying degrees of these two features,the authors demonstrate that group effects are vital for efficient navigation led by a minority of informed ***,the real-world drone-swarm experiments validate the applicability of the proposed interaction to artificial robotic collectives.

关键词： assemble topological interaction bio-inspired robotics collective navigation flying robots swarm intelligence