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A Practical Approach for Missing Wireless Sensor Networks Data Recovery

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China Communications 2024年第5期21卷 202-217页

作者： song Xiaoxiang Guo Yan Li Ning Ren bing The College of Communications Engineering Army Engineering University of PLANanjing 210007China The 63891 Unit of PLA Luoyang 471000China

In wireless sensor networks(WSNs),the performance of related applications is highly dependent on the quality of data ***,missing data is almost inevitable in the process of data acquisition and *** methods often rely on prior information such as low-rank characteristics or spatiotemporal correlation when recovering missing WSNs ***,in realistic application scenarios,it is very difficult to obtain these prior information from incomplete data ***,we aim to recover the missing WSNs data effectively while getting rid of the perplexity of prior *** designing the corresponding measurement matrix that can capture the position of missing data and sparse representation matrix,a compressive sensing(CS)based missing data recovery model is ***,we design a comparison standard to select the best sparse representation basis and introduce average cross-correlation to examine the rationality of the established ***,an improved fast matching pursuit algorithm is proposed to solve the *** results show that the proposed method can effectively recover the missing WSNs data.

关键词： average cross correlation matching pursuit missing data wireless sensor networks

Re-study of Nucleon Pole Contribution in J/ψ → NN^-π Decay

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Communications in Theoretical Physics 2006年第3X期46卷 507-513页

作者： ZONG Yuan-Yuan SHEN Peng-Nian ZOU bing-song LIU Ji-Feng LIANG Wei-Hong Institute of High Energy Physics the Chinese Academy of Sciences P.O. Box 918(4) Beijing 100049 China Department of Physics Guangxi Normal University Guilin 541004 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China

We re-study nucleon pole contribution in J/ψ → NN^-π decays by including the imaginary part for the propagator of the off-shell nucleon with energy above π N threshold. It is found that when including the imaginary part in the propagator, the branching ratio of the decay width will descend about 11% compared with the result without including the imaginary part, no matter whether including the off-shell form factors or not. It also leads to a phase of up to 25° for the off-shell nucleon propagator at invariant mass around 1400 MeV. This effect needs to be considered for detailed partial wave analysis of N^＊ resonances around this mass region.

关键词： J/ψ decay form factor

Human-Machine Shared Lateral Control Strategy for Intelligent Vehicles Based on Human Driver Risk Perception Reliability

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Automotive Innovation 2024年第1期7卷 102-120页

作者： Dongjian song bing Zhu Jian Zhao Jiayi Han State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130022China

Intelligent vehicle(Ⅳ)technology has developed rapidly in recent ***,achieving fully unmanned driving still presents numerous challenges,which means that human drivers will continue to play a vital role in vehicle operation for the foreseeable ***-machine shared driving,involving cooperation between a human driver and an automated driving system(AVS),has been widely regarded as a necessary stage for the development of *** onⅣdriving safety,this study proposed a human-machine shared lateral control strategy(HSLCS)based on the reliability of driver risk *** HSLCS starts by identifying the effective areas of driver risk perception based on eye *** establishes an anisotropic driving risk field,which serves as the foundation for the AVS to assess risk *** upon the cumulative and diminishing effects of risk perception,the proposed approach leverages the driver's risk perception effective area and converts the risk field into a representation aligned with the driver's ***,it quantifies the reliability of the driver's risk perception by using area-matching ***,based on the driver’s risk perception reliability and dif-ferences in lateral driving operation between the human driver and the AVS,the dynamic distribution of driving authority is achieved through a fuzzy rule-based system,and the human-machine shared lateral control is completed by using model predictive *** HSLCS was tested across various scenarios on a driver-in-the-loop test *** results show that the HSLCS can realize the synergy and complementarity of human and machine intelligence,effectively ensuring the safety ofⅣoperation.

关键词： Intelligent vehicle Human-machine shared driving Risk perception Driving authority distribution

阿伐曲泊帕与重组人血小板生成素治疗肝移植后严重血小板减少症的临床疗效

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肝胆外科杂志 2024年第3期32卷 178-182页

作者：刘松兵陈广厚戴清清赵红川安徽医科大学第一附属医院肝胆胰及移植外科一病区合肥230022

目的探究阿伐曲泊帕与重组人血小板生成素(rhTPO)治疗肝移植后严重血小板减少症的临床疗效。方法回顾性分析安徽医科大学第一附属医院2016年2月至2023年3月之间81例出现肝移植后严重血小板减少症患者的临床资料。81例患者中,38例接受阿... 详细信息

目的探究阿伐曲泊帕与重组人血小板生成素(rhTPO)治疗肝移植后严重血小板减少症的临床疗效。方法回顾性分析安徽医科大学第一附属医院2016年2月至2023年3月之间81例出现肝移植后严重血小板减少症患者的临床资料。81例患者中,38例接受阿伐曲泊帕治疗被分配到阿伐曲泊帕组,43例接受rhTPO治疗被分配到rhTPO组。监测指标包括用药后血小板变化、治疗有效率、术后并发症发生情况、用药后肝肾功能变化和短期生存率。结果用药后第3、5、7、10和15天阿伐曲泊帕组患者的血小板计数明显高于rhTPO组患者(P>0.05),第30天无差异(P0.05)。结论阿伐曲泊帕和rhTPO均能提升肝移植后严重血小板减少症患者的血小板水平,其中阿伐曲泊帕的临床疗效优于rhTPO。

关键词：阿伐曲泊帕重组人血小板生成素肝移植血小板减少

Distribution and geochemical significance of alkylbenzenes for crude oil with different depositional environments and thermal maturities

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Petroleum Science 2024年第2期21卷 777-790页

作者： bing-Kun Meng Dao-Fu song Yuan Chen Sheng-Bao Shi School of Petroleum Engineering and Environmental Engineering Yan'an UniversityYan'an716000ShaanxiChina State Key Laboratory of Petroleum Resources and Prospecting College of GeosciencesChina University of PetroleumBeijing102249China

A total of 45 alkylbenzenes were detected and identified in crude oils with different depositional environments and thermal maturities from the Tarim Basin,Beibuwan Basin,and songliao Basin using comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry(GC×GCTOFMS).By analyzing the distribution characteristics of C0-C5alkylbenzenes,it is found that the content of some alkylbenzenes varies greatly in crude *** on the distribution characteristics of 1,2,4,5-tetramethylbenzene(Te MB)and 1,2,3,4-Te MB,the ratio of 1,2,4,5-Te MB to 1,2,3,4-Te MB is proposed to indicate the organic matter origin and depositional environment of ancient *** samples originated mainly from lower hydrobiont,algae,bacteria and source rocks deposited under reducing/anoxic conditions have low 1,2,4,5-/1,2,3,4-Te MB values(less than 0.6),while oil samples originated mainly from terrestrial higher plants and source rocks deposited under oxic/sub-oxic conditions have higher 1,2,4,5-/1,2,3,4-Te MB values(greater than 1.0).The significant difference of 1,2,4,5-/1,2,3,4-Te MB values is controlled by 1,2,4,5-Te MB content.1,2,4,5-Te MB content in oils derived from source rocks deposited in oxidized sedimentary environment(greater than 1.0 mg/g whole oil)is higher than that in oils from source rocks deposited in reduced sedimentary environment(less than 1.0 mg/g whole oil).1,2,4,5-/1,2,3,4-Te MB ratio might not or slightly be affected by evaporative fractionation,biodegradation and thermal maturity.1,2,4,5-/1,2,3,4-Te MB ratio and 1,2,4,5-Te MB content can be used as supplementary parameter for the identification of sedimentary environment and organic matter *** should be noted that compared to the identification of organic matter sources,the 1,2,4,5-/1,2,3,4-Te MB parameter is more effective in identifying sedimentary environments.

关键词： 1 2 4 5-Tetramethylbenzene GC×GC-TOFMS Organic matter origin Depositional environment

萸蓉壮骨膏调控EZH2/Wnt3a/β-catenin通路促进绝经后骨质疏松大鼠成骨分化

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中国骨质疏松杂志 2024年第6期30卷 818-823,894页

作者：邢尚曼郭超宋冰白敏汪湛东汪可欣徐晓艳张延英汪永锋甘肃中医药大学甘肃兰州730000 甘肃省实验动物行业技术中心甘肃兰州730000 甘肃中医药大学附属医院甘肃兰州730000

目的基于EZH2/Wnt3a/β-catenin通路调控成骨分化探讨萸蓉壮骨膏对绝经后骨质疏松大鼠的治疗作用及机制。方法取SD大鼠复制绝经后骨质疏松模型,模型构建成功后随机分为模型组、阿仑膦酸钠片组[6.3 mg/(kg·周)]及萸蓉壮骨膏高[10.8 g/(k... 详细信息

目的基于EZH2/Wnt3a/β-catenin通路调控成骨分化探讨萸蓉壮骨膏对绝经后骨质疏松大鼠的治疗作用及机制。方法取SD大鼠复制绝经后骨质疏松模型,模型构建成功后随机分为模型组、阿仑膦酸钠片组[6.3 mg/(kg·周)]及萸蓉壮骨膏高[10.8 g/(kg·d)]、中[5.4 g/(kg·d)]、低剂量[2.7 g/(kg·d)]组,另选同龄大鼠作为假手术组。Micro CT检测骨微结构,HE染色观察股骨组织病理形态;IF法检测大鼠股骨组织中成骨相关蛋白(Runx2、OSX、OPG)表达水平。RT-qPCR及Western blot法检测大鼠胫骨组织中EZH2、Wnt3a、β-catenin mRNA和蛋白表达水平。结果与假手术组比较,模型组大鼠骨微结构(BMD、BV/TV、***、Tb.N和***)显著破坏(P<0.05),骨小梁排列稀疏松散,结构出现不连续间断,脂滴累积较多,骨组织中成骨蛋白表达显著降低(P<0.05),EZH2 mRNA和蛋白表达水平显著升高,Wnt3a、β-catenin mRNA和蛋白表达水平显著降低(P<0.05);与模型组比较,各给药组大鼠骨微结构显著改善(P<0.05),各给药组不同程度改善模型大鼠骨组织病理结构,各给药组大鼠骨组织中成骨蛋白表达不同程度增加(P<0.05),各给药组大鼠骨组织中EZH2 mRNA和蛋白表达水平显著降低,Wnt3a、β-catenin mRNA和蛋白表达水平显著增加(P<0.05)。结论萸蓉壮骨膏能够显著改善绝经后骨质疏松大鼠骨流失,其作用机制与萸蓉壮骨膏调控EZH2/Wnt3a/β-catenin通路促进成骨分化有关。

关键词：萸蓉壮骨膏绝经后骨质疏松症 EZH2/Wnt3a/β-catenin通路成骨分化

Isothermal reduction kinetics of Panzhihua ilmenite concentrate under 30vol% CO–70vol% N2 atmosphere

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International Journal of Minerals,Metallurgy and Materials 2017年第3期24卷 240-248页

作者： Ying-yi Zhang Wei Lü Xue-wei Lü Sheng-ping Li Chen-guang Bai bing song Ke-xi Han College of Materials Science and Engineering Chongqing University Chongqing 400044 China Panzhihua Iron and Steel Research Institute Panzhihua 617000 China

The reduction of ilmenite concentrate in 30vol% CO–70vol% N_2 atmosphere was characterized by thermogravimetric and differential thermogravimetric(TG–DTG) analysis methods at temperatures from 1073 to 1223 *** isothermal reduction results show that the reduction process comprised two stages;the corresponding apparent activation energy was obtained by the iso-conversional and model-fitting *** the first stage,the effect of temperature on the conversion degree was not obvious,the phase boundary chemical reaction was the controlling step,with an apparent activation energy of 15.55–40.71 k J·mol^(–1).For the second stage,when the temperatures was greater than 1123 K,the reaction rate and the conversion degree increased sharply with increasing temperature,and random nucleation and subsequent growth were the controlling steps,with an apparent activation energy ranging from 182.33 to 195.95 k J·mol^(–1).For the whole reduction process,the average activation energy and pre-exponential factor were 98.94^(–1)18.33 k J·mol^(–1) and 1.820^(–1).816 min^(–1),respectively.

关键词： ilmenite isothermal reduction kinetics carbon monoxide

Electrical Discharge Machining of Al2024-65 vol%SiC Composites

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Acta Metallurgica Sinica(English Letters) 2017年第5期30卷 447-455页

作者： Wen-Shu Yang Guo-Qin Chen Ping Wu Murid Hussain Jia-bing song Rong-Hua Dong Gao-Hui Wu Department of Materials Science and Engineering HarbinInstitute of TechnologyHarbin 150001China Northwest Institute of Nuclear Technology Xi'an 710024China Department of Chemical Engineering COMSATS Instituteof Information TechnologyM.A.Jinnah BuildingDefenceRoadOff Raiwind RoadLahore 54000Pakistan Beijing Institute of Aerospace Control Devices Beijing 100039China

In the present work, the wire electrical discharge machining（WEDM） process of the 65 vol% SiCp/2024 Al composite prepared by pressure infiltration methods has been investigated. The microstructure of the machined composite was characterized by scanning electron microscope, the average surface roughness（Ra）, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy（TEM） techniques. Three zones from the surface to the interior（melting zone, heat affected zone and un-affected zone） were found in the machined composites, while the face of SiC particles on the surface toward the outside was ‘‘cut＇＇ to be flat. Increase in Al and Si but decrease in C and O were observed in the core areas of the removed particles. Si phase, which was generated due to the decomposition of SiC, was detected after the WEDM process. The irregular and spherical particles were further observed by TEM. Based on the microstructure observation, it is suggested that the machining mechanism of 65 vol% SiCp/2024 Al composite was the combination of the melting of Al matrix and the decomposition of SiC particles.

关键词： Metal matrix composites SiCp/Al composite Metal infiltration Wire electrical discharge machining(WEDM) SiC decomposition Machining mechanism

Building up the spectrum of pentaquark states as hadronic molecules

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Science Bulletin 2021年第13期66卷 1258-1259页

作者： bing-song Zou CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Physics Central South UniversityChangsha 410083China

Following the observation of three narrow N^(*)pentaquark states with hidden charm,P_(c)(4312),P_(c)(4440)and P_(c)(4457)[1,2],very recently,the LHCb Collaboration reported the first evidence for their strangeΛ*coun... 详细信息

关键词：强子五夸克态谱学