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Dynamic inhomogeneous S-Boxes design for efficient AES masking mechanisms

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The Journal of China Universities of Posts and Telecommunications 2008年第2期15卷 72-76页

作者： chen yi-cheng ZOU Xue-cheng LIU Zheng-lin chen Xiao-fei HAN Yu Research Center for VLSI and Systems Huazhong University of Science andTechnology Wuhan 430074 China

It is an important challenge to implement a lowcost power analysis immune advanced encryption standard （AES） circuit. The previous study proves that substitution boxes （S-Boxes） in AES are prone to being attacked, and hard to mask for its non-linear characteristic. Besides, large amounts of circuit resources in chips and power consumption are spent in protecting S-Boxes against power analysis. Thus, a novel power analysis immune scheme is proposed, which divides the data-path of AES into two parts： inhomogeneous S-Boxes instead of fixed S-Boxes are selected randomly to disturb power and logic delay in the non-linear module; at the same time, the general masking strategy is applied in the linear part of AES. This improved AES circuit was synthesized with united microelectronics corporation （UMC） 0.25 μm 1.8 V complementary metal-oxide-semiconductor （CMOS） standard cell library, and correlation power analysis experiments were executed. The results demonstrate that this secure AES implementation has very low hardware cost and can enhance the AES security effectually against power analysis.

关键词： AES S-Boxes power analysis correlation poweranalysis (CPA)

A Novel Phase Transition Phenomenon in Bistable System

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Chinese Physics Letters 1997年第4期14卷 245-247页

作者： JIA Ya LI Jia-rong chen yi-cheng Institute of Particle Physics Huazhong Normal UniversityWuhan 430070 CCAST(World Laboratory) P.O.Box 8730Beijing 100080 Department of Physics Huazhong Normal UniversityWuhan 430070

A bistable system driven by additive noise and multiplicative noise is studied,when the correlation time of the correlations between two noises is *** is found that the system undergoes a succession of two phase trans... 详细信息

关键词： noise Transition system

Resistivity characteristics of red clay contaminated by Cu2+

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Yantu Lixue/Rock and Soil Mechanics 2020年 41卷 200-208页

作者： chen, yi-cheng Song, Yu chen, Xue-Jun Bi, Peng-Yan Huang, Xiang Liang, De-Xian Guilin University of Technology Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering Guilin 541004 China

The resistivity of red clay contaminated by Cu2+ was studied in the improved Miller Soil Box under the consideration of different moisture content, porosity and pollution concentration. The comparison of resistivity measurement results between two-electrode and four electrode methods is studied, and the influence of potential electrode penetrations in four electrode method is also investigated. The order of impact degree of three main factors (moisture content, porosity and pollution concentration) on the resistivity of soil polluted by heavy metals were qualitatively and quantitatively analyzed by the orthogonal tests. Besides, a resistivity prediction model for heavy metal contaminated red clay based on these three major impact factors was established. The results show that the four electrode method should be used and the ideal penetration depth of potential electrode is 3 cm in the measurement of soil resistivity. The order of impact degree is Cu2+ concentration > moisture content > porosity. The relationship between resistivity and these three factors can be expressed using a series of power functions. The resistivity of red clay contaminated by heavy metals decreases with the increase of Cu2+ concentration and moisture content, and increases with the increase of porosity. The calculated values based on the resistivity prediction model of heavy metal contaminated red clay under these three main factors show a good agreement with the measured values. The method can be effectively applied in the evaluation of heavy metal contaminated sites in red clay areas. © 2020, Science Press. All right reserved.

关键词： Heavy metals

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ILAS Ⅱ系统读者库的重建及数据导入

图书馆论坛 2008年第5期28卷 63-64页

作者：陈成义温州市图书馆浙江温州325000

结合实例,分析了ILAS Ⅱ系统读者库重建及数据导入的过程,彻底解决读者库冗余的问题,也可以作为读者数据批导入的方法。

关键词： ILAS Ⅱ 自动化系统读者数据

Synthesis of Fluorescent Conjugated Polymers with Pendant Carbohydrate Ligands and Their Applications in Biosensing

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Synthesis of Fluorescent Conjugated Polymers with Pendant Ca...

2009年全国高分子学术论文报告会

作者： Qi chen,Qian-yi cheng,yi Cui,Jie Cao,Bao-Hang Han 国家纳米科学中心中国科学院研究生院

＜正＞Fluorescent conjugated glycopolymers,possessing both fluorescent scaffolding and reporting carbohydrate ligands,are attractively used into carbohydrate-protein interaction studies and biosensor applications because of their intrinsic optical properties,high sensitivities to minor stimuli and good *** well-defined fluorescent conjugated polymers with pendant carbohydrate ligands were easily prepared through Cu（I）-catalyzed azide/alkyne"Click"ligation and Suzuki coupling *** the fluorescent multivalent model system of glyco-conjugates, the polymers were used for studies of carbohydrate-lectin interactions,metal ion-mediated carbohydrate-carbohydrate interactions,and polycations-DNA interactions based on fluorescence *** the presence of specific acceptors,these well-defined fluorescent glycopolymers will exhibit exceptional fluorescence quenching or energy transfer efficiencies,resulting in the amplification of optical signals for the transduction of carbohydrate-mediated biological recognizing events.

关键词： Biosensing carbohydrates carbohydrate-mediated interactions fluorescent conjugated polymers

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2209例妊娠期糖尿病筛查及干预结果分析

中国妇幼保健 2008年第4期23卷 471-473页

作者：陈益成浙江省宁波市江东区妇幼保健院 315040

目的：了解江东区妊娠期糖尿病发病情况及干预效果。方法：对2004年～2005年来该院建立围产保健卡册进行系统管理并已分娩的孕妇2209例，常规进行妊娠期糖尿病筛查，对筛查出糖耐量异常的孕妇及时进行干预。结果：糖筛查阳性479例，阳性... 详细信息

目的：了解江东区妊娠期糖尿病发病情况及干预效果。方法：对2004年～2005年来该院建立围产保健卡册进行系统管理并已分娩的孕妇2209例，常规进行妊娠期糖尿病筛查，对筛查出糖耐量异常的孕妇及时进行干预。结果：糖筛查阳性479例，阳性率21．68％；确诊妊娠期糖尿病（GDM）59例，检出率2．67％；糖耐量受损93例，检出率6．88％；糖耐量异常（GDM＋GIGT）152例，检出率4．21％。糖耐量异常孕妇饮食控制达到血糖控制值139例，占91．45％；加胰岛素治疗13例，占8．56％：孕产期母儿并发症发生率、新生儿出生体重与正常妊娠组比较，无统计学意义。结论：常规开展妊娠期糖尿病筛查，早期诊断、及时干预是降低围产期发病率的有效措施。

关键词：妊娠糖尿病筛查干预

基于分子力场的网联自主车辆跟驰安全特性及模型

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交通运输系统工程与信息 2023年第6期23卷 33-41页

作者：曲大义孟奕名王韬宋慧陈意成青岛理工大学机械与汽车工程学院山东青岛266520 青岛理工大学土木工程学院山东青岛266520 淄博职业学院人工智能与大数据学院山东淄博255314

为更精准地描述人车路复杂环境下网联异质车流多维感知与交互所呈现的动态特性,本文提出运用分子动力学势场函数定量描述车辆间相互作用关系的车辆跟驰行为模型,从分子力场角度剖析网联自主车辆的自驱动粒子特性和车车交互行为安全特性... 详细信息

为更精准地描述人车路复杂环境下网联异质车流多维感知与交互所呈现的动态特性,本文提出运用分子动力学势场函数定量描述车辆间相互作用关系的车辆跟驰行为模型,从分子力场角度剖析网联自主车辆的自驱动粒子特性和车车交互行为安全特性,独辟系统分析网联异质车群协同关系和安全态势演化规律的新思路。首先,类比复杂交通场景的网联自主车辆为自驱动粒子,基于分子动力学势场理论推导出网联自主车辆跟驰行为模型表达式,引入速度协同项,建立网联自主车辆跟驰行为的分子力场模型;其次,运用人工蜂群算法,采用High_D车辆轨迹数据对已有的跟驰模型和智能驾驶员模型进行参数标定,验证分析分子力场跟驰模型的合理性及安全性;设计数值仿真实验检验分子力场模型对真实车辆跟驰行为的拟合效果及稳定性表现。数值仿真结果表明,分子力场模型得出的车辆加速度结果与实际数据的平均值绝对误差与均方根误差更低,且受到扰动时波动更小,该模型提升了网联自主车辆跟随行驶的安全和效率,宏观车流运行具有更好的稳定性。网联自主车辆的分子力场跟驰模型可系统描述网联异质车群的动态特性、微观车辆跟驰行为和车车安全交互作用关系,为提高行车安全性及通行效率提供理论基础。

关键词：智能交通网联自主车辆跟驰行为模型分子力场稳定性分析

Magneto‑Dielectric Synergy and Multiscale Hierarchical Structure Design Enable Flexible Multipurpose Microwave Absorption and Infrared Stealth Compatibility

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Nano-Micro Letters 2025年第2期17卷 401-416页

作者： chen Li Leilei Liang Baoshan Zhang yi Yang Guangbin Ji School of Electronic Science and Engineering Nanjing UniversityNanjing 210093People’s Republic of China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Developing advanced stealth devices to cope with radar-infrared(IR)fusion detection and diverse application scenarios is increasingly demanded,which faces significant challenges due to conflicting microwave and IR cloaking mechanisms and functional integration ***,we propose a multiscale hierarchical structure design,integrating wrinkled MXene IR shielding layer and flexible Fe_(3)O_(4)@C/PDMS microwave absorption *** top wrinkled MXene layer induces the intensive diffuse reflection effect,shielding IR radiation signals while allowing microwave to pass ***,the permeable microwaves are assimilated into the bottom Fe_(3)O_(4)@C/PDMS layer via strong magneto-electric *** theoretical and experimental optimization,the assembled stealth devices realize a near-perfect stealth capability in both X-band(8–12 GHz)and long-wave infrared(8–14μm)wavelength ***,it delivers a radar cross-section reduction of−20 dB m^(2),a large apparent temperature modulation range(ΔT=70℃),and a low average IR emissivity of ***,the optimal device demonstrates exceptional curved surface conformability,self-cleaning capability(contact angle≈129°),and abrasion resistance(recovery time≈5 s).This design strategy promotes the development of multispectral stealth technology and reinforces its applicability and durability in complex and hostile environments.

关键词： Microwave absorption Radar-infrared compatible stealth Wrinkled MXene Magneto-dielectric synergy Multifunction

异步电机变频调速矢量控制系统的MATLAB仿真研究

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煤炭技术 2012年第2期31卷 40-42页

作者：陈承义柳州铁道职业技术学院广西柳州545007

在简述电压空间矢量脉宽调制技术(SVPWM)原理的基础上,利用MATLAB软件中的SIMULINK工具包进行仿真,完成了异步电动机变频调速矢量控制系统的仿真,并从高等教育的角度出发,介绍了一种新的教学实践的思路。

关键词：电动机变频空间电压矢量脉宽调制教育