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Bismuth-based halide double perovskite Cs_(2)KBiCl_(6): Disorder and luminescence

Chinese Chemical Letters 2024年第5期35卷 504-508页

作者： Pan Liu Yanming Sun Alberto J.Fernández-Carrión Bowen Zhang Hui Fu Lunhua He Xing Ming Congling yin Xiaojun Kuang MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials Guangxi Key Laboratory of Optic and Electronic Materials and DevicesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China Analytical Instrumentation Center College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Spallation Neutron Source Science Center Dongguan 523803China Chinese Academic of Science Institute of PhysicsBeijing National Laboratory for Condensed Matter PhysicsBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China College of Science Guilin University of TechnologyGuilin 541004China College of Chemistry and Bioengineering Guilin University of TechnologyGuilin 541004China

A new bismuth-based halide double perovskite Cs_(2)KBiCl_(6) was isolated successfully through solid-state reactions and investigated using X-ray and neutron *** than an ordered structure,the crystal structure consists of shifted Cs,K,Bi,and Cl sites from the ideal positions with fractional occupancy in compensation,leading to variable local coordination of Cs^(+)ions,as revealed by^(133)Cs solid-state nuclear magnetic resonance ***_(2)KBiCl_(6) displays volume hysteresis at 5-298 K range upon heating and *** Cs_(2)KBiCl_(6) has a direct bandgap of 3.35(2)eV and red-shift luminescence of around 600 nm upon Mn doping compared with the Na *** stabilization of disordered structure in Cs_(2)KBiCl_(6) is related to two factors including the large-sized K^(+)cation which prefers to coordinate with more than six Cl^(-),and the Bi^(3+)with 6s^(2) lone pair which has a preference for a local asymmetric *** findings could have general application and help to understand the structure and property of halide perovskites.

关键词： Halide perovskite Double perovskite Luminescence Disordered structure Direct bandgap

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Layered coordination polymer with two-dimensional covalent bismuth-organic networks:Semiconductor and lithium ion storage

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Nano Research 2024年第3期17卷 2181-2185页

作者： Mu-Qing Li Yulin Cao Lei Qin Hua Cheng Weimin yang Zhouguang Lu School of Materials Science and Environmental Engineering Shenzhen Polytechnic UniversityShenzhen 518055China Industrial Training Center Shenzhen Polytechnic UniversityShenzhen 518055China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China

Single crystals of a bismuth-based coordination polymer(CP)with carboxyl-thiol ligands,[Bi(C_(8)H_(2)O_(4)S_(2))(C2H8N)]n(Bi-DSBDC-DMA,DMBDC=2,5-disulfur-1,4-dicarboxylate,DMA=dimethylamine),have been successfully synthesized.X-ray diffraction analysis reveals that Bi-DSBDC-DMA possesses a layered structure,with two-dimensional(2D)Bi-DSBDC networks alternating with layers composed of dimethylamine *** material demonstrates semiconducting properties,featuring an optical bandgap of 2.2 eV and an electrical conductivity of 2×10^(-8) S/***,electrodes based on this material exhibit a capacity of 250 mAh/g after 200 cycles for lithium-ion storage.

关键词： bismuth layer coordination polymer(CP) semiconductor lithium ion storage

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Traffic anomaly detection algorithm for CAN bus using similarity analysis Chao Wang,Xueqiao Xu∗,Ke Xiao,Yunhua He,Guangcan yang School of Information Science and Technology,Traffic anomaly detection algorithm for CAN bus using similarity analysis

High-Confidence Computing

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High-Confidence Computing 2024年第3期4卷 64-74页

作者： Chao Wang Xueqiao Xu Ke Xiao Yunhua He Guangcan yang School of Information Science and Technology North China University of TechnologyBeijing 100144North China University of TechnologyBeijing 100144

Recently,vehicles have experienced a rise in networking and informatization,leading to increased security *** the most widely used automotive bus network,the Controller Area Network(CAN)bus is vulnerable to attacks,as security was not considered in its original *** paper proposes SIDuBzip2,a traffic anomaly detection method for the CAN bus based on the bzip2 compression *** proposed method utilizes the pseudo-periodic characteristics of CAN bus traffic,constructing time series of CAN IDs and calculating the similarity between adjacent time series to identify abnormal *** method consists of three parts:the conversion of CAN ID values to characters,the calculation of similarity based on bzip2 compression,and the optimal solution of model *** experimental results demonstrate that the proposed SIDuBzip2 method effectively detects various attacks,including Denial of Service,replay,basic injection,mixed injection,and suppression *** addition,existing CAN bus traffic anomaly detection methods are compared with the proposed method in terms of performance and delay,demonstrating the feasibility of the proposed method.

关键词： Automotive safety CAN bus Anomaly detection

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CAGCN:Centrality-Aware Graph Convolution Network for Anomaly Detection in Industrial Control Systems

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Journal of Computer Science & Technology 2024年第4期39卷 967-983页

作者： Jun yang Yi-Qiang Sheng Jin-Lin Wang Hong Ni National Network New Media Engineering Research Center Institute of AcousticsChinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

In industrial control systems,the utilization of deep learning based methods achieves improvements for anomaly ***,most current methods ignore the association of inner components in industrial control *** industrial control systems,an anomaly component may affect the neighboring components;therefore,the connective relationship can help us to detect anomalies *** this paper,we propose a centrality-aware graph convolution network(CAGCN)for anomaly detection in industrial control *** the traditional graph convolution network(GCN)model,we utilize the concept of centrality to enhance the ability of graph convolution networks to deal with the inner relationship in industrial control *** experiments show that compared with GCN,our CAGCN has a better ability to utilize this relationship between components in industrial control *** performances of the model are evaluated on the Secure Water Treatment(SWaT)dataset and the Water Distribution(WADI)dataset,the two most common industrial control systems datasets in the field of industrial anomaly *** experimental results show that our CAGCN achieves better results on precision,recall,and F1 score than the state-of-the-art methods.

关键词： graph convolution network(GCN) data mining network centrality anomaly detection industrial control system

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Adaptive PID Control for Hydraulic Turbine Regulation Systems Based on INGWO and BPNN

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Protection and Control of Modern Power Systems 2024年第4期9卷 126-146页

作者： Jinbao Chen Gang He Yunhe Wang yang Zheng Zhihuai Xiao the China yangtze River Electric Power Co. Ltd.Wuhan 430000China the School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China the Hebei Fengning Pumped Storage Co. Ltd.Chengde 050300China

To ensure system stability,the fixed-PID(F-PID)controller with small parameters is usually adopted in hydropower *** involves a slow setting speed and it is difficult to realize optimal control for full working *** address the problem,this paper designs a variable-PID(V-PID)controller for a hydraulic turbine regulation system(HTRS)based on the improved grey wolf optimizer(INGWO)and back propagation neural networks(BPNN).These can achieve excellent regulation under full working ***,the nonlinear HTRS model containing the nonlinear hydroturbine model is constructed and the stable domain is obtained using Hopf bifurcation theory to determine the available range of PID *** optimal PID parameters in typical working conditions are then calculated by the INGWO,and the optimal PID parameters are generalized through training the V-PID neural networks which take the optimal PID parameters as sample *** V-PID neural networks with different structures are compared to determine the optimal structure of the variable-PID controller *** V-PID controller-based nonlinear HTRS model shows that the PID parameters can be automatically adjusted online according to the working condition changes,realizing optimal control of hydropower units in full working conditions.

关键词： Hydraulic turbine regulation system back propagation neural networks Hopf bifurcation grey wolf optimizer variable-PID controller

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Optimization of Center of Gravity Position and Anti-Wave Plate Angle of Amphibious Unmanned Vehicle Based on Orthogonal Experimental Method

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 2027-2041页

作者： Deyong Shang Xi Zhang Fengqi Liang Chunde Zhai Hang yang Yanqi Niu School of Mechanical Electronic&Information EngineeringChina University of Mining and Technology(Beijing)Beijing100083China Institute of Intelligent Mining&Robotics China University of Mining and Technology(Beijing)Beijing100083China

When the amphibious vehicle navigates in water,the angle of the anti-wave plate and the position of the center of gravity greatly influence the navigation *** the relevant research on reducing the navigation resistance of amphibious vehicles by adjusting the angle of the anti-wave plate,there is a lack of scientific selection of parameters and reasonable research of simulation results by using mathematical methods,and the influence of the center of gravity position on navigation characteristics is not considered at the same *** study the influence of the combinations of the angle of the anti-wave plate and the position of the center of gravity on the resistance reduction characteristics,a numerical calculation model of the amphibious unmanned vehicle was established by using the theory of computational fluid dynamics,and the experimental data verified the correctness of the numerical *** on this numerical model,the navigation characteristics of the amphibious unmanned vehicle were studied when the center of gravity was located at different positions,and the orthogonal experimental design method was used to optimize the parameters of the angle of the anti-wave plate and the position of the center of *** results show that through the parameter optimization analysis based on the orthogonal experimental method,the combination of the optimal angle of the anti-wave plate and the position of the center of gravity is *** the numerical simulation result of resistance is consistent with the predicted optimal *** with the maximum navigational resistance,the parameter optimization reduces the navigational resistance of the amphibious unmanned vehicle by 24%.

关键词： Amphibious unmanned vehicle orthogonal experimental design anti-wave plate center of gravity resistance characteristic

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胰腺癌临床研究回顾与展望

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中国实用外科杂志 2020年第1期40卷 48-52页

作者：杨尹默田孝东许静涌赵旭东北京大学第一医院外科北京100034 国家老年医学中心北京医院普通外科北京100730

胰腺癌发病率呈上升趋势,临床诊治极具挑战性。近20年来,我国胰腺外科发展迅速,与国际接轨,与世界同步,学术水平和地位不断提升。胰腺癌治疗模式已从传统"surgery first"过渡至多学科综合治疗协作组(MDT);腹腔镜及机器人胰腺手术日益普... 详细信息

胰腺癌发病率呈上升趋势,临床诊治极具挑战性。近20年来,我国胰腺外科发展迅速,与国际接轨,与世界同步,学术水平和地位不断提升。胰腺癌治疗模式已从传统"surgery first"过渡至多学科综合治疗协作组(MDT);腹腔镜及机器人胰腺手术日益普及,但仍须开展随机对照试验(RCT)研究进行肿瘤学评价;手术切除范围、切缘标准日趋规范;新辅助治疗有助于改善交界可切除胰腺癌的预后。从经验性治疗到个体化施治、从极限性手术到极致性手术、从解剖学切除到生物学治愈,是胰腺癌外科治疗未来的发展方向。

关键词：胰腺癌多学科综合治疗协作组手术新辅助治疗

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逆境条件下糯玉米水分利用效率和水通道蛋白表达差异研究

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中国生态农业学报 2011年第3期19卷 607-613页

作者：郑小亚张正斌徐萍杨引福西北农林科技大学农学院杨凌712100 中国科学院遗传与发育生物学研究所农业资源研究中心石家庄050022

水肥耦合是作物水分和养分高效利用的重要机制,其中水通道蛋白(AQP)发挥重要作用。本文研究了逆境条件下3个糯玉米品种水分利用效率(WUE)和水通道蛋白(AQP)表达差异及其关系。在低氮(0.5N,其中培养液的氮元素含量减半)、高氮(1.5N,其中... 详细信息

水肥耦合是作物水分和养分高效利用的重要机制,其中水通道蛋白(AQP)发挥重要作用。本文研究了逆境条件下3个糯玉米品种水分利用效率(WUE)和水通道蛋白(AQP)表达差异及其关系。在低氮(0.5N,其中培养液的氮元素含量减半)、高氮(1.5N,其中培养液的氮元素含量增加1/2)、干旱(10%PEG即-0.1 MPa)和盐(200 mmol.L-1 NaCl)胁迫处理下测定了叶片水分利用效率(WUEL),并采用半定量逆转录聚合酶链式反应(RT-PCR)体系检测3个AQP基因在糯玉米根系中的表达情况。结果表明:(1)0.5N处理下,3个品种的WUEL多低于CK;1.5N和PEG处理下,3个品种的WUEL多高于CK。(2)TIP3.1、TIP2a、TIP2b 3个基因在0.5N处理下表现为不表达或表达下调,1.5N处理下6 h和PEG处理下9 h多表现表达上调,说明TIPs基因家族表达受营养、干旱和盐胁迫诱导。(3)TIPs的上述3个基因的表达和WUEL都在0.5N处理下低于CK,在1.5N和PEG处理下不同程度地高于CK,说明TIPs基因表达与WUEL的变化有密切响应关系。以上结果说明WUE与TIPs基因转录水平的调控有一定关系,且品种间存在较大差异。

关键词：糯玉米水分利用效率水通道蛋白逆境

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Electrocatalytic stability of two-dimensional materials

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Journal of Energy Chemistry 2024年第10期97卷 302-320,I0006页

作者： Huijie Zhu Youchao Liu Yongsen Wu Yushan He yang Cao Sheng Hu State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005FujianChina

In electrocatalysis,two-dimensional(2D)materials have attracted extensive interests due to their unique electronic structure and physical *** recent years,many efforts have been devoted to improving the catalytic activity of 2D ***,the stability of 2D materials under catalytic conditions,as a critical issue,requires better understanding for any practical *** review summarizes recent progress in electrocatalytic stability of 2D materials,including four intrinsic factors that affect the stability of 2D materials:*** interactions between 2D catalyst and substrate;2,delamination of 2D catalyst layers;*** phase of 2D materials;*** and environmental instability of 2D ***,some corresponding solutions are summarized for each *** addition,this review proposes potential routes for developing 2D catalytic materials with both high activity and stability.

关键词： 2D materials Electrocatalyst Stability

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Robust Information Hiding Based on Neural Style Transfer with Artificial Intelligence

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Computers, Materials & Continua 2024年第5期79卷 1925-1938页

作者： Xiong Zhang Minqing Zhang Xu AnWang Wen Jiang Chao Jiang Pan yang College of Cryptography Engineering Engineering University of People’s Armed PoliceXi’an710086China Key Laboratory of People’s Armed Police for Cryptology and Information Security Xi’an710086China Key Laboratory of CTC&Information Engineering(Engineering University of People’s Armed Police) Ministry of EducationXi’an710086China Staff Department of People’s Armed Police Ningxia Corps Yinchuan750000China

This paper proposes an artificial intelligence-based robust information hiding algorithm to address the issue of confidential information being susceptible to noise attacks during *** algorithm we designed aims to mitigate the impact of various noise attacks on the integrity of secret information during *** method we propose involves encoding secret images into stylized encrypted images and applies adversarial transfer to both the style and content features of the original and embedded *** process effectively enhances the concealment and imperceptibility of confidential information,thereby improving the security of such information during transmission and reducing security ***,we have designed a specialized attack layer to simulate real-world attacks and common noise scenarios encountered in practical *** adversarial training,the algorithm is strengthened to enhance its resilience against attacks and overall robustness,ensuring better protection against potential *** results demonstrate that our proposed algorithm successfully enhances the concealment and unknowability of secret information while maintaining embedding ***,it ensures the quality and fidelity of the stego *** method we propose not only improves the security and robustness of information hiding technology but also holds practical application value in protecting sensitive data and ensuring the invisibility of confidential information.

关键词： Information hiding neural style transfer robustness

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