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Delta Compression Correction Method for Covert Communication in IoT

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China Communications 2024年第9期21卷 60-74页

作者： hu zhijuan Liu Shuangyu Xu Fei Liu Liqiang Li Guiping School of Computer Science and Engineering Xi’an Technological UniversityXi’an 710021China

Covert communication can conceal the existence of wireless transmission and thus has the ability to address information security transfer issue in many applications of the booming Internet of Things(IoT).However,the proliferation of sensing devices has generated massive amounts of data,which has increased the burden of covert *** the spatiotemporal correlation of data collection causing redundancy between data,eliminating duplicate data before transmission is beneficial for shortening transmission time,reducing the average received signal power of warden,and ultimately realizing covert *** this paper,we propose to apply delta compression technology in the gateway to reduce the amount of data generated by IoT devices,and then sent it to the cloud *** this end,a cost model and evaluation method that is closer to the actual storage mode of computer systems is been *** on which,the delta version sequence obtained by existing delta compression algorithms is no longer compact,manifested by the still high *** this situation,we designed the correction scheme based on instructions merging(CSIM)correction to save costs by merging ***,the delta version sequence is divided into five categories and corresponding merge rules were ***,for any COPY/ADD class delta compression algorithm,merge according to strict to relaxed to selection rules while generating ***,a more cost-effective delta version sequence can be *** experimental results on random data show that the delta version sequences output by the CSIM corrected 1.5-pass and greedy algorithms have better performance in cost reducing.

关键词： correction method covert communica-tion delta compression Internet of Things(IoT)

Effect of Microstructure of Composite Powders on Microstructure and Properties of Microwave Sintered Alumina Matrix Ceramics

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Journal of Materials Science & Technology 2013年第5期29卷 429-433页

作者： Hanmin Bian Yong Yang You Wang Wei Tian Haifu Jiang zhijuan hu Weimin Yu Department of Materials Science Harbin Institute of Technology Tianjin Cement Industry Design & Research Institute Co. Ltd. School of Materials Science and Engineering Hebei University of Technology China Gas Turbine Establishment National Defense Science and Technology Key Lab for Reliability and Environment Engineering Technology Beijing Institute of Spacecraft Environment Engineering

Two kinds of different structured alumina-titania composite powders were used to prepare alumina matrix ceramics by microwave sintering. One was powder mixture of alumina and titania at a micron-submicron level, in which fused-and-crushed alumina particles （micrometers） was clad with submicron-sized titania. The other was powder mixture of alumina and titania at nanometer-nanometer level, in which nano-sized alumina and nano-sized titania particles were homogeneously mixed by ball-milling and spray dried to prepare spherical alumina-titania composite powders. The effect of the microstructure of composite powders on microstructure and properties of microwave sintered alumina matrix ceramics were investigated. Nano-sized composite （NC） powder showed enhanced sintering behavior compared with micro-sized composite （MC） powders. The as- prepared NC ceramic had much denser, finer and more homogenous microstructure than MC ceramic. The mechanical properties of NC ceramic were significantly higher than that of MC ceramic, e.g. the flexural strength, Vickers hardness and fracture toughness of NC ceramic were 85.3%, 130.3% and 25.7% higher than that of MC ceramic, respectively. The improved mechanical properties of NC ceramic compared with that of MC ceramic were attributed to the enhanced densification and the finer and more homogeneous microstructure through the use of the nanostructured composite powders.

关键词： Al2O3 Composites Microwave processing Mechanical properties

Short-form OPA1 is a molecular chaperone in mitochondrial intermembrane space

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Science China(Life Sciences) 2022年第2期65卷 227-235页

作者： Deyang Yao Yukun Li Sheng Zeng Zhifan Li Zahir Shah Bigui Song Jinglei Liu Yi Wu Liang Yang Qi Long Wenqian Wang zhijuan hu Haite Tang Xingguo Liu School of Life Sciences University of Science and Technology of ChinaHefei 230027China Bioland Laboratory(Guangzhou Regenerative Medicine and Health Guangdong Laboratory) CAS Key Laboratory of Regenerative BiologyJoint School of Life SciencesGuangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhou Medical UniversityGuangzhou 510530China Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine Institute for Stem Cell and RegenerationGuangzhou Institutes of Biomedicine and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesGuangzhou 510530China Centre for Regenerative Medicine and Health Hong Kong Institute of Science&InnovationChinese Academy of SciencesHong Kong SARChina

Mitochondria,double-membrane organelles,are known to participate in a variety of metabolic and signal transduction *** intermembrane space(IMS)of mitochondria is proposed to subject to multiple damages emanating from the respiratory *** optic atrophy 1(OPA1),an important protein for mitochondrial fusion,is cleaved into soluble short-form(S-OPA1)under *** we report that S-OPA1 could function as a molecular chaperone in *** purified the S-OPA1(amino acid sequence after OPA1 isoform 5 S1 site)protein and showed it protected substrate proteins from thermally and chemically induced aggregation and strengthened the thermotolerance of Escherichia coli(***).We also showed that S-OPA1 conferred thermotolerance on IMS proteins,e.g.,*** chaperone activity of S-OPA1 may be required for maintaining IMS homeostasis in mitochondria.

关键词： mitochondria OPA1 chaperone mitochondrial homeostasis heat shock

同方期刊数据库

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模拟分解炉中煤焦燃烧生成NO的特性

化工学报 2005年第3期56卷 545-550页

作者：胡芝娟刘志江王世杰天津水泥工业设计研究院天津300400 华中科技大学煤燃烧国家重点实验室湖北武汉430074

对国内水泥行业中几种煤焦在模拟的分解炉中 NO生成特性进行了研究, 考察了煤种、温度、生料对焦炭氮的释放特性的影响, 探讨了焦炭氮在工业分解炉中的释放机理. 研究结果表明, 不同煤种的 NO生成特性有较大的不同; 温度对NO的生成特性... 详细信息

对国内水泥行业中几种煤焦在模拟的分解炉中 NO生成特性进行了研究, 考察了煤种、温度、生料对焦炭氮的释放特性的影响, 探讨了焦炭氮在工业分解炉中的释放机理. 研究结果表明, 不同煤种的 NO生成特性有较大的不同; 温度对NO的生成特性也有明显的影响, 基本随温度的升高而加大, 但有时也有下降现象; 生料的加入大大加速了NO的生成速率和转化率, 表明生料对 NO生成有显著的催化作用. 工业分解炉中产生的NO主要来源于燃料NO, 焦炭氮转化为NO的概率主要有两个互相竞争的反应决定: 包括 N的氧化反应和 NO的还原反应.

关键词：分解炉焦炭燃烧 NO排放水泥生料

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煤焦还原NO的实验研究

华中科技大学学报（自然科学版） 2006年第1期34卷 21-23页

作者：王世杰陆继东胡芝娟黄来华中科技大学煤燃烧国家重点实验室湖北武汉430074 天津水泥工业设计研究院天津300400

利用高温气固悬浮反应实验台对水泥工业预分解炉中不同煤焦(烟煤和无烟煤)还原NO的反应进行了模拟实验研究,并对还原机理进行了深入的分析.研究结果表明,不同种类的煤焦由于自身物理化学特性的差异,其还原NO的能力有所不同;在生料存在下... 详细信息

利用高温气固悬浮反应实验台对水泥工业预分解炉中不同煤焦(烟煤和无烟煤)还原NO的反应进行了模拟实验研究,并对还原机理进行了深入的分析.研究结果表明,不同种类的煤焦由于自身物理化学特性的差异,其还原NO的能力有所不同;在生料存在下,生料明显地对煤焦还原NO的反应有正催化作用,大大加速了煤焦还原NO的能力.并且,生料主要是通过CaCO3煅烧分解生成的CaO起主要催化作用的,生料最终的催化作用决定于各氧化物催化作用的相对大小.

关键词：一氧化氮煤焦高温气固悬浮态实验台

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分解炉结构参数的优化设计研究

华中科技大学学报（自然科学版） 2005年第11期33卷 45-47页

作者：陆继东夏凡黄来胡芝娟华中科技大学煤燃烧国家重点实验室湖北武汉430074 天津水泥工业设计研究院天津300400

针对水泥生产中分解炉的结构参数优化设计问题,提出了一种利用分解炉虚拟样机结合神经网络、遗传算法及正交设计的方法,详细研究了它们之间的逻辑联系和在整体优化设计框架中的作用,同时以水泥生产中常见的双喷腾分解炉为例,对其结构参... 详细信息

针对水泥生产中分解炉的结构参数优化设计问题,提出了一种利用分解炉虚拟样机结合神经网络、遗传算法及正交设计的方法,详细研究了它们之间的逻辑联系和在整体优化设计框架中的作用,同时以水泥生产中常见的双喷腾分解炉为例,对其结构参数进行了优化设计研究,给出了优化结果.该方法不仅建立了一套较为完备的分解炉系统仿真和分析的理论体系,为分解炉进一步的开发和设计提供了有利的工具,同时也为工程设计人员提供了一种优化思路.

关键词：分解炉虚拟样机神经网络遗传算法正交设计方差分析优化设计

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正交试验设计法在水泥预分解炉设计中的应用

华中科技大学学报（自然科学版） 2005年第6期33卷 32-34,75页

作者：陆继东张振顶黄来胡芝娟华中科技大学煤燃烧国家重点实验室湖北武汉430074 天津水泥工业设计研究院天津300400

在分解炉计算机仿真试验平台进行仿真试验的基础上提出了正交试验设计方法,并以DD型分解炉为例进行了分解炉结构参数的优化设计,经过对试验结果的统计分析和方差分析,得到了影响显著性因子R1和优化结果:分解炉下喷口半径R1=0.66m,分解... 详细信息

在分解炉计算机仿真试验平台进行仿真试验的基础上提出了正交试验设计方法,并以DD型分解炉为例进行了分解炉结构参数的优化设计,经过对试验结果的统计分析和方差分析,得到了影响显著性因子R1和优化结果:分解炉下喷口半径R1=0.66m,分解炉的生料分解率平均提高1.3%.研究表明:分解炉的仿真试验与正交试验设计法相结合可有效地解决分解炉结构参数的优化设计问题.

关键词：分解炉正交试验设计优化设计方差分析

Impact of mtDNA-encoded proteins arising from cytosolic translation(mPACT)

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Science Bulletin 2024年第23期69卷 3648-3651页

作者： Liang Yang Yile huang Yingzhe Ding zhijuan hu Xian Sheng Zhang Ying hua Su Xingguo Liu Center for Development and Regeneration Guangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhou 510530China Centre for Regenerative Medicine and Health Hong Kong Institute of Science&InnovationChinese Academy of SciencesHong Kong 999077China Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative MedicineChina-New Zealand Joint Laboratory on Biomedicine and HealthCUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative MedicineGIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research CentreInstitute for Stem Cell and RegenerationGuangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhou 510000China State Key Laboratory of Wheat Improvement College of Life SciencesShandong Agricultural UniversityTai’an 271000China

Mitochondria are multifunctional organelles that regulate energy homeostasis,apoptosis,cell signaling and many biosynthetic *** have their own genomes that reportedly contain 37 well-known genes,including 13 proteincoding genes,2 genes encoding ribosomal RNAs(rRNAs)and 22 genes encoding transfer RNAs(tRNAs).RNA is essential for most biological functions which can act as a translation template for protein production or perform the function itself to directly regulate cellular *** addition to those functioning inside mitochondria,mitochondria can regulate many important biological processes through exporting RNAs including long non-coding mitochondrial RNAs(ncmtRNAs),circRNAs,rRNAs,tRNAs and mRNAs.

关键词： homeostasis template Impact

不同硫含量的煤对水泥熟料烧成和矿物组成的影响

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硅酸盐学报 2010年第11期38卷 2205-2211页

作者：李小燕胡芝娟叶旭初俞为民陶从喜南京工业大学材料科学与工程学院南京210009 天津水泥工业设计研究院有限公司天津300400

通过添加硫含量在2.10%～5.21%之间的高硫煤与原料混合,配制了具有相同石灰饱和系数、硅率和铝率的几种熟料,并在1200,1250,1300,1 350,1 400和1 450℃保温30min烧成熟料。应用差示扫描量热仪、X射线衍射仪和环境扫描电镜来研究熟料液... 详细信息

通过添加硫含量在2.10%～5.21%之间的高硫煤与原料混合,配制了具有相同石灰饱和系数、硅率和铝率的几种熟料,并在1200,1250,1300,1 350,1 400和1 450℃保温30min烧成熟料。应用差示扫描量热仪、X射线衍射仪和环境扫描电镜来研究熟料液相初析温度、熟料矿物、含硫矿物以及熟料形貌。结果显示:高硫煤的引入降低了液相初析温度(10～30℃),促进了阿利特晶体的生成和长大。硫的固溶改变了阿利特、贝利特的含量和铝酸盐的晶型。

关键词：高硫煤水泥熟料矿物组成晶型含硫物相