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Efficient and robust missing key tag identification for large-scale RFID systems

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Digital Communications and Networks 2023年第6期9卷 1421-1433页

作者： chu chu Guangjun Wen Jianyu Niu School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu611731China Research Institute of Trustworthy Autonomous Systems Southern University of Science and TechnologyShenZhen518055China School of Engineering The University of British ColumbiaKelownaV1V 1V7BCCanada

Radio Frequency Identification(RFID)technology has been widely used to identify missing *** many applications,rapidly pinpointing key tags that are attached to favorable or valuable items is *** realize this goal,interference from ordinary tags should be avoided,while key tags should be efficiently *** many previous studies,how to rapidly and dynamically filter out ordinary tags when the ratio of ordinary tags changes has not been ***,how to efficiently verify missing key tags in groups rather than one by one has not been explored,especially with varying missing *** this paper,we propose an Efficient and Robust missing Key tag Identification(ERKI)protocol that consists of a filtering mechanism and a verification ***,the filtering mechanism adopts the Bloom filter to quickly filter out ordinary tags and uses the labeling vector to optimize the Bloom filter's performance when the key tag ratio is ***,the verification mechanism can dynamically verify key tags according to the missing rates,in which an appropriate number of key tags is mapped to a slot and verified at ***,we theoretically analyze the parameters of the ERKI protocol to minimize its execution *** numerical results show that ERKI can accelerate the execution time by more than 2.14compared with state-of-the-art solutions.

关键词： RFID Missing key tag identification Time efficiency Robust

基于Jeeves模式搜索理论地基参数的更新Bayes探测法（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第9期19卷 691-703页

作者： Jian ZHANG chao JIA chu-wei ZHOU Department of Mechanics and Structural Engineering Nanjing University of Aeronautics and Astronautics School of Civil Engineering Shandong University

目的:通过Jeeves模式搜索理论建立弹性地基参数的更新Bayes探测分析模型,以及获得地基参数的寻优搜索结果。创新点:1.根据Bayes统计理论,推导更新Bayes误差函数。2.结合最优步长的抛物线插值理论,推求地基参数的Jeeves模式搜索寻优方法... 详细信息

目的:通过Jeeves模式搜索理论建立弹性地基参数的更新Bayes探测分析模型,以及获得地基参数的寻优搜索结果。创新点:1.根据Bayes统计理论,推导更新Bayes误差函数。2.结合最优步长的抛物线插值理论,推求地基参数的Jeeves模式搜索寻优方法,建立地基参数的探测分析模型。方法:1.根据Bayes统计理论,推导更新Bayes误差函数(公式(4))及误差函数对地基参数的梯度表达式(公式(5))。2.根据中厚度弹性地基板理论,推求Winkler地基上板的控制微分方程(公式(19))和Fourier闭式解(公式(20))。3.提出最优步长的抛物线插值寻优方案,并结合Jeeves模式搜索理论建立弹性地基参数的更新Bayes探测分析模型。结论:1.基于更新Bayes理论,可研究地基参数的Jeeves模式搜索分析模型,且地基参数的探测迭代过程具有良好的稳定性与收敛性。2.更新Bayes误差函数能同时考虑不同量测次数和不同测点的位移实测信息,计算效率较高。3.与共轭梯度法和Kalman滤波方法不同的是,Jeeves模式搜索理论的迭代过程不涉及误差函数偏导数计算,避免了迭代过程的误差累积。

关键词： Jeeves模式搜索理论更新Bayes误差函数探测地基参数 Fourier闭式解

Extensional tectonics and North China Craton destruction:Insights from the magnetic susceptibility anisotropy(AMS)of granite and metamorphic core complex

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Science China Earth Sciences 2021年第9期64卷 1557-1589页

作者： Wei LIN Jipei ZENG Lingtong MENG Huabiao QIU Wei WEI Zhiheng REN Yang chu Shuangjian LI chao SONG Qincheng WANG State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsInnovation Academy for Earth ScienceChinese Academy of SciencesBeijing100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing100049China Sinopec Petroleum Exploration and Production Research Institute Beijing100083China SinoProbe Center Chinese Academy of Geological SciencesBeijing100037China

The craton is a long-lived stable geologic unit on the Earth’s ***,since the Mesozoic,the North China Craton(NCC)experienced large-scale lithospheric removal,the fundamental change of physical and chemical characteristics of the lithospheric mantle,widely distributed crustal deformation,and extensive *** complex evolution contrary to other cratons is called the NCC *** magmatism in the eastern NCC is an important response to the lithospheric removal at depth and crustal deformation on the *** plutons emplace under a tectonic context and therefore record the information of the tectonics;especially,the anisotropy magnetic susceptibility(AMS)pattern of the pluton was acquired with the influence of regional *** the past fifteen years,about 22 plutons intruding during the different periods from the Late Triassic to the late stage of the Early Cretaceous have been studied with *** emplacement mechanisms of plutons and the contemporary tectonic setting were discussed to constrain their relationship with the NCC destruction in different stages of *** a result,the Late Triassic,Early Jurassic,and Late Jurassic plutons exhibit consistent N(E)-S(W)trending magnetic *** early stage of Early Cretaceous plutons display NW-SE trending magnetic lineations,while the late stage of Early Cretaceous plutons show magnetic lineations with various *** with previous studies,it is concluded that the emplacements of the plutons intruding in these three stages were controlled by weak N(E)-S(W)trending extension,regional NW-SE trending extension,and weak extension in the shallow crustal level,*** transformation of regional extension from the N(E)-S(W)to the NW-SE direction was accompanied by a strain-increasing *** extensional tectonics in the eastern NCC was interpreted to represent the interaction between Mongol-Okhotsk belt,PaleoPacific plate,and eastern Eurasian continent

关键词： Mesozoic granite Anisotropy of magnetic susceptibility(AMS)of granite Eastern NCC Extensional tectonics NCC destruction

Hexagonal boron nitride:A metal-free catalyst for deep oxidative desulfurization of fuel oils

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Green Energy & Environment 2020年第2期5卷 166-172页

作者： Peiwen Wu Linjie Lu Jing He Linlin Chen Yanhong chao Minqiang He Fengxia Zhu Xiaozhong chu Huaming Li Wenshuai Zhu School of Chemistry and Chemical Engineering Insitute for Energy ResearchJiangsu UniversityZhenjiang212013China School of the Environment and Safety Engineering Jiangsu University212013China School of Chemistry and Chemical Engineering Huaiyin Normal UniversityHuaian223300China

Oxidative desulfurization(ODS)has been proved to be an efficient strategy for the production of clean fuel *** metal-based materials have been employed as excellent ODS catalysts,but being hindered by their high-cost and potential secondary *** this work,we employed graphene analogous hexagonal boron nitride(h-BN)as a metal-free catalyst for ODS with hydrogen peroxide(H2O2)as the *** h-BN catalyst was characterized and proved to be a few-layered structure with relatively high specific surface *** h-BN catalyst showed a 99.4%of sulfur removal in fuel oil under the optimized reaction ***,the h-BN can be recycled for 8 times without significant decrease in the catalytic *** mechanism analysis found that it is the boron radicals in h-BN activated H2O2 to generate·OH species,which can readily oxidize sulfides to corresponding sulfones for *** work would provide another choice in choosing metal-free catalysts for ODS.

关键词： Boron nitride Metal-free Oxidation Deep desulfurization Fuel oils

Two new species of the genus Sinopodisma(Orthoptera:Acridoidea:Catantopidae:Podisminae) from China

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Zoological Systematics 2015年第3期40卷 349-354页

作者： Xiang-chu Yin Yong-chao Zhi Zhan Yin College of Life Sciences Hebei University College of Plant Protection Shandong Agricultural University Northwest Plateau Institute of Biology Chinese Academy of Sciences

Two new species of the genus Sinopodisma Chang, 1940 from Guizhou, China are described in this paper. S. xiai sp. nov. is similar to S. keloggii （Chang, 1940）, but differs from the latter by the length of a segment in antennae 2.5 times width in the middle part, median keel ofpronotum distinct, cercus of male very wide at basal part, its maximum width 2.2 times width of middle part and ancorae of epiphallus oblique inward, lower margin straight. S. fanjingshana sp. nov. is similar to S. wulingshana Peng ＆ Fu, 1992, but differs from the latter in hind margin of pronotum with small hollow slightly in the middle, tegmina of male extending over the hind margin of first abdominal tergum distinctly, interspace of mesosternum narrow at the middle in male, ancorae of epiphallus lower than anterior projection, length of subgenital plate 1.5 times width in female. Type specimens are deposited in the Natural Museum of Hebei University, Baoding, Hebei, China.

关键词： Orthoptera Catantopidae Sinopodisma new species Guizhou.

主体结构荷载可控的新型组合式防护结构(Ⅱ):影响因素及设计理念

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爆炸与冲击 2025年第1期45卷 16-27页

作者：方秦高矗孔祥振杨亚陆军工程大学爆炸冲击防灾减灾国家重点实验室江苏南京210007 内蒙古财经大学财政税务学院内蒙古呼和浩特010070

为明确泡沫混凝土厚度和强度对组合式防护结构抗爆性能的影响,充分发挥和合理利用泡沫混凝土良好的消波特性,首先通过试验及数值模拟探讨不同泡沫混凝土厚度和强度对组合式防护结构抗爆性能的影响,并分析分层梯度泡沫混凝土在爆炸波作... 详细信息

为明确泡沫混凝土厚度和强度对组合式防护结构抗爆性能的影响,充分发挥和合理利用泡沫混凝土良好的消波特性,首先通过试验及数值模拟探讨不同泡沫混凝土厚度和强度对组合式防护结构抗爆性能的影响,并分析分层梯度泡沫混凝土在爆炸波作用下的消波特性。然后将组合式防护结构与采用中粗砂为分配层的传统成层式结构进行对比分析验证其优越性,在此基础上,总结凝练出组合式防护结构的主体结构荷载可控的设计理念。结果表明,利用泡沫混凝土材料较长的屈服平台和较低的波阻抗,以泡沫混凝土作为能量调控层,通过设计泡沫混凝土强度等级(密度等级)和厚度以及采用多层梯度泡沫混凝土,可使得作用于主体结构上的爆炸荷载峰值恰为泡沫混凝土屈服强度,实现对主体结构上荷载的可控设计,有效解决了中粗砂为分配层的传统成层式结构不易控制作用于主体结构上荷载的问题。研究结果可为抗新型钻地弹的防护设计提供重要参考。

关键词：泡沫混凝土组合式防护结构可控设计爆炸波消波

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电动拖拉机双电源并联控制研究

农机化研究 2025年第1期47卷 234-238页

作者：初香港王宝超陈叶青岛农业大学机电工程学院山东青岛266109

电动拖拉机具有结构简单和节能减排等优点,但现有电动拖拉机作业时采用单一动力电池能源,存在续航时间短的问题。为了提高电动拖拉机长续航供电能力,提出了一种基于下垂控制的直流双电源并联均流联合供电方案,利用MatLab/Simulink搭建... 详细信息

电动拖拉机具有结构简单和节能减排等优点,但现有电动拖拉机作业时采用单一动力电池能源,存在续航时间短的问题。为了提高电动拖拉机长续航供电能力,提出了一种基于下垂控制的直流双电源并联均流联合供电方案,利用MatLab/Simulink搭建了系统模型。仿真试验表明:单电源可以实现升压稳压控制;基于下垂控制的双电源并联均流能够实现双电源的电流均流;当切换不同功率负载时,系统电压随功率增加按比例下调,验证了该方案的可行性。

关键词：电动拖拉机双电源并联下垂控制动态仿真

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Analysis of effect factors-based stochastic network planning model

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Journal of Systems Engineering and Electronics 2008年第1期19卷 112-118页

作者： chu chunchao China Academy of Transportation Science Beijing 100029 P. R. China

Looking at all the indeterminate factors as a whole and regarding activity durations as independent random variables, the traditional stochastic network planning models ignore the inevitable relationship and dependence among activity durations when more than one activity is possibly affected by the same indeterminate factors. On this basis of analysis of indeterminate effect factors of durations, the effect factors-based stochastic network planning （EFBSNP） model is proposed, which emphasizes on the effects of not only logistic and organizational relationships, but also the dependent relationships, due to indeterminate factors among activity durations on the project period. By virtue of indeterminate factor analysis the model extracts and describes the quantitatively indeterminate effect factors, and then takes into account the indeterminate factors effect schedule by using the Monte Carlo simulation technique. The method is flexible enough to deal with effect factors and is coincident with practice. A software has been developed to simplify the model-based calculation, in *** language. Finally, a case study is included to demonstrate the applicability of the proposed model and comparison is made with some advantages over the existing models.

关键词： stochastic network planning activity duration effect factor

Tailoring surface roughness of LaMnO_(3) buffer layers for YBCO-coated conductors

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Rare Metals 2015年第12期34卷 859-863页

作者： chao Yang Yuan-Ying He Jun-Wei chu Yan Xue Fei Zhang Wang Hui Bo-Wan Tao Jie Xiong State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Applied Research Laboratory of Superconduction and New Material Institute of Electrical Engineering Chinese Academy of Sciences

LaMnO_(3)(LMO) cap layers with different surface roughness were prepared on epi-MgO/ion-beam-assisted deposition (IBAD) MgO/solution deposition planarized (SDP) Y2O3/Hastelloy tape. The effects of the surface roughness of LMO on the crystallization, texture and superconducting properties of Yba2Cu3O7?δ (YBCO) films were systematically investigated. The crystallization and epitaxial texture of resulting YBCO film are significantly improved with the surface roughness of LMO decreasing from 7.0 to 1.3nm. High-performance YBCO-coated conductors could be achieved if surface roughness of LMO cap layer is well controlled.

关键词： YBa_(2)Cu_(3)O_(7-δ)(YBCO) Coated conductors LaMnO_(3)cap Surface roughness Superconducting properties