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Theoretical design of thermal spin molecular logic gates by using a combinational molecular junction

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Chinese Physics B 2022年第4期31卷 616-621页

作者： yi Guo Peng Zhao gang Chen School of Physics and Technology University of JinanJinan 250022China School of Physics and Electronics Shandong Normal UniversityJinan 250358China

Based on the density functional theory combined with the nonequilibrium Green function methodology,we have studied the thermally-driven spin-dependent transport properties of a combinational molecular junction consisting of a planar four-coordinate Fe molecule and a 15,16-dinitrile dihydropyrene/cyclophanediene molecule,with single-walled carbon nanotube bridge and *** results show that the magnetic field and light can effectively regulate the thermallydriven spin-dependent *** thermal spin-filtering effect and good thermal switching effect are *** results are explained by the Fermi-Dirac distribution function,the spin-resolved transmission spectra,the spatial distribution of molecular projected self-consistent Hamiltonian orbitals,and the spin-resolved current *** the basis of these thermally-driven spin-dependent transport properties,we have further designed three basic thermal spin molecular AND,OR,and NOT gates.

关键词： thermal molecular logic gate thermally-driven spin-dependent transport combinational molecular junction nonequilibrium Green's function

Separation of tungsten and molybdenum with solvent extraction using functionalized ionic liquid tricaprylmethylammonium bis(2,4,4-trimethylpentyl)phosphinate

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International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1769-1776页

作者： Fei cao Wei Wang De-zhou Wei Wen-gang Liu School of Resource and Civil Engineering Northeastern UniversityShenyang 110819China Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGSZhengzhou 450006China Key Laboratory for Polymetallic Ores’Evaluation and Utilization MNRZhengzhou 450006China

Functionalized ionic liquids(FILs)as extractants were employed for the separation of tungsten and molybdenum from a sulfate solution for the first *** effects of initial pH,extractant concentration,metal concentrations in the feed were comprehensively *** results showed that tricaprylmethylammonium bis(2,4,4-trimethylpentyl)phosphinate([A336][Cyanex272])could selectively extract W over Mo at an initial pH value of 5.5;the best separation factorβ_(W/Mo) of 25.61 was obtained for a solution with low metal concentrations(WO3:2.49 g/L,Mo:1.04 g/L).The[A336][Cyanex272]system performed effectively for solutions of different W/Mo molar ratios and different metal ion concentrations in the *** chemical reaction between[A336][Cyanex272]and W followed the ion association mechanism,which was further proved by the Fourier-transform infrared(FTIR)spectra of loaded[A336][Cyanex272]and the free *** stripping experiments indicated that 95.48%W and 100.00%Mo were stripped using a 0.20 mol/L sodium hydroxide ***,the selective extractions of W and Mo from two synthetic solutions of different high metal concentrations were obtained;the separation factorβW/Mo reached 23.24 and 17.59 for the first and second solutions,*** results suggest the feasibility of[A336][Cyanex272]as an extractant for the separation of tungsten and molybdenum.

关键词： tungsten molybdenum ionic liquid separation solvent extraction

TEMPO-Regulated Regio-and Stereoselective Cross-Dihalogenation with Dual Electrophilic X^(+) Reagents

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Chinese Journal of Chemistry 2021年第11期39卷 3004-3010页

作者： yi Kong Tongxiang cao Shifa Zhu Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouGuangdong510640 China

A TEMPO catalyzed cross-dihalogenation reaction was established via redox-regulation of the otherwise complex system of dual electrophilic X+***,the ICl,BrCl,I_(2) and Br_(2) were generated in-situ,which enabled high regio-or stereoselective access to a myriad of iodochlorination,bromochlorination and homo-dihalogenation products with a wide spectrum of *** its mild conditions and operational simplicity,this method could enable wide applications in organic synthesis,which was exemplified by divergent synthesis of two *** mechanistic investigations via radical clock reaction,pinacol ring expansion and Hammett experiments were conducted,which confirmed the intermediacy of halonium *** addition,a dynamic catalytic model based on the versatile catalytic role of TEMPO was proposed to explain the selective outcomes.

关键词： Halogenation Organocatalysis Electrophilic addition Redox-regulation Alkynes

Blockchain Meets Generative Behavior Steganography:A Novel Covert Communication Framework for Secure IoT Edge Computing

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Chinese Journal of Electronics 2024年第4期33卷 886-898页

作者： Yuanlong cao Junjie LI Kailin CHAO Jianmao XIAO gang LEI School of Computer Information Engineering Jiangxi Normal University Jiangxi Blockchain Data Security and Governance Engineering Research Center Jiangxi Normal University School of Software Jiangxi Normal University

The rapid development of Internet of things(Io T) and edge computing technologies has brought forth numerous possibilities for the intelligent and digital future. The frequent communication and interaction between devices inevitably generate a large amount of sensitive information. Deploying a blockchain network to store sensitive data is crucial for ensuring privacy and security. The openness and synchronicity of blockchain networks give rise to challenges such as transaction privacy and storage capacity issues, significantly impeding their development in the context of edge computing and Io T. This paper proposes a reliable fog computing service solution based on a blockchain fog architecture. This paper stores data files in the inter planetary file system(IPFS) and encrypts the file hash values used for retrieving data files with stream cipher encryption. It employs a steganographic transmission technique leveraging Alpha Zero's Gomoku algorithm to discretely transmit the stream cipher key across the blockchain network without a carrier, thus achieving dual encryption. This approach aims to mitigate the storage burden on the blockchain network while ensuring the security of transaction data. Experimental results demonstrate that the model enhances the transmission capacity of confidential information from kilobytes(KB) to megabytes(MB) and exhibits high levels of covert and security features.

关键词： Steganography Ciphers Privacy Data privacy Blockchains Encryption Internet of Things

Thermal stable and ultralow dielectric loss in(Gd_(0.5)Ta_(0.5))_(x)Ti_(1-x)O_(2)giant permittivity ceramics by defect engineering

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Journal of Materiomics 2023年第1期9卷 157-165页

作者： Jiangtao Fan gang He Zhenzhu cao Yongfan cao Zhen Long Zhanggui Hu Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional CrystalCollege of Material Science and EngineeringTianjin University of TechnologyTianjin300384China Chemical Engineering College of Inner Mongolia University of Technology Hohhot010051China

High dielectric loss and poor temperature stability are the current barriers to the application of dielectric *** present work,we synthesized a system of acceptor Gd^(3+)and donor Ta^(5+)co-doped(Gd_(0.5)Ta_(0.5))_(x)Ti_(1-x)O_(2)(GTTOx,x=0,0.01,0.02,0.04,0.06)ceramics to enhance dielectric *** was found that a colossal permittivity(CP,2.65×10^(4)@1 kHz,2.37×10^(4)@1 MHz),a very low dielectric loss(tanδ,0.007@1 kHz,0.03@1 MHz),good stability of frequency(20–10^(6)Hz)and temperature(RT–250°C,Δε′(T)/ε′30<±15%,at 1 kHz)were achieved simultaneously in GTTO0.01 *** impedance spectroscopy,XPS,SEM,and Raman spectroscopy were used to investigate the reasons for the improved dielectric *** result indicated that the main reasons for CP and low dielectric loss are the synergistic effect of the electron pinning defect-dipole(EPDD)model,the internal blocking layer capacitance(IBLC)mechanism,and electrode *** work provides a promising approach for the design of defect-related high-performance giant dielectric ceramics.

关键词： Colossal permittivity Activation energy Polarization Impedance spectroscopy

Active learning accelerated Monte-Carlo simulation based on the modified K-nearest neighbors algorithm and its application to reliability estimations

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Defence Technology（防务技术） 2023年第10期28卷 306-313页

作者： Zhifeng Xu Jiyin cao gang Zhang Xuyong Chen Yushun Wu School of Civil Engineering and Architecture Wuhan Institute of TechnologyWuhan430200PR China School of Mechanical and Electrical Engineering Wuhan Institute of TechnologyWuhan430200PR China Failure Mechanics&Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu610065PR China

This paper proposes an active learning accelerated Monte-Carlo simulation method based on the modified K-nearest neighbors *** core idea of the proposed method is to judge whether or not the output of a random input point can be postulated through a classifier implemented through the modified K-nearest neighbors *** to other active learning methods resorting to experimental designs,the proposed method is characterized by employing Monte-Carlo simulation for sampling inputs and saving a large portion of the actual evaluations of outputs through an accurate classification,which is applicable for most structural reliability estimation ***,the validity,efficiency,and accuracy of the proposed method are demonstrated *** addition,the optimal value of K that maximizes the computational efficiency is ***,the proposed method is applied to the reliability estimation of the carbon fiber reinforced silicon carbide composite specimens subjected to random displacements,which further validates its practicability.

关键词： Active learning Monte-carlo simulation K-nearest neighbors Reliability estimation Classification

CD176 single-chain variable antibody fragment inhibits the adhesion of cancer cells to endothelial cells and hepatocytes

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Frontiers of Medicine 2016年第2期10卷 204-211页

作者： Jiangnan Liu Bin yi Zhe Zhang yi cao Laboratory of Molecular and Experimental Pathology Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650223 China Kunming College of Life Science University of Chinese Academy of Sciences Kunming 650223 China

CD176 （Thomsen-Friedenreich antigen） is a tumor-associated carbohydrate epitope （glycotope） functionally involved in blood spread and fiver metastasis of cancer cells by mediating the adhesion of cancer cells to endothelial cells and hepatocytes, respectively. CD176 could be a promising target for antitumor immunotherapy. We applied B lymphocytes obtained from mice immunized with CD176 antigen and constructed a phage display library. A positive clone of CD176 single-chain variable antibody fragment （scFv） was successfully screened from this library. The CD176 scFv was expressed in Escherichia coli and purified. The purified scFv can bind to the natural CD176 expressed on the surface of cancer cells. Furthermore, the CD176 scFv inhibits the adhesion of CD176＋ cancer cells to endothelial cells and hepatocytes. This CD176 scFv provides a basis for future development of recombinant CD176-specific antibodies that can be used in therapeutic application.

关键词： CD 176 Thomsen-Friedenreich antigen scFv cancer therapy adhesion metastasis

Coalition Formation in Weighted Simple-majority Games under Proportional Payoff Allocation Rules

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International Journal of Automation and computing 2009年第3期6卷 217-222页

作者： Zhi-gang cao Xiao-Guang Yang Key Laboratory of Management Decision and Information SystemsAcademy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 PRC

In this paper, we introduce a simple coalition formation game in the environment of bidding, which is a special case of the weighted majority game （WMG）, and is named the weighted simple-majority game （WSMG）. In WSMG, payoff is allocated to the winners proportional to the players powers, which can be measured in various ways. We define a new kind of stability： the counteraction-stability （C-stability）, where any potential deviating players will confront counteractions of the other players. We show that C-stable coalition structures in WSMG always contains a minimal winning coalition of minimum total power. For the variant where powers are measured directly by their weights, we show that it is NP-hard to find a C-stable coalition structure and design a pseudo-polynomial time algorithm. Sensitivity analysis for this variant, which shows many interesting properties, is also done. We also prove that it is NP-hard to compute the Holler-Packel indices in WSMGs, and hence in WMGs as well.

关键词： Weighted majority games (WMG) coalition formation bidding C-stability NP-hard.

SOLUTION OF A KIND OF LINEAR INTERNAL WAVE EQUATION

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Journal of Hydrodynamics 2005年第5期17卷 636-640页

作者： WANG gang HOU yi-jun ZHENG Quan-an Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China Department of Meteorology University of Maryland Maryland 20742-2425 USA

Considering the effect of horizontal Coriolis parameter and the density compactness of seawater, which were often neglected in internal waves discussion, the governing equation of linear internal waves presented by vertical velocity only will be proposed. Under the assumption that the Brunt- Vaeisaelae frequency is exponential, an accurate analytic solution of it is obtained. Finally, the expressions of wave functions are also given.

关键词： internal wave Boussinesq approximation,Coriolis parameter Brunt-Vaeisaelae frequency