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State estimation with quantized innovations in wireless sensor networks: Gaussian mixture estimator and posterior Cramér–Rao lower bound

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Chinese Journal of Aeronautics 2015年第6期28卷 1735-1746页

作者： Zhang Zhi Li Jianxun liu liu liu zhaolei Han Shan Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Nanjing Research Institute of Electronics Technology Engineering Research Center of Wideband Wireless Communication Technology Ministry of EducationNanjing University of Posts and Telecommunications

Since the features of low energy consumption and limited power supply are very impor- tant for wireless sensor networks （WSNs）, the problems of distributed state estimation with quan- tized innovations are investigated in this paper. In the first place, the assumptions of prior and posterior probability density function （PDF） with quantized innovations in the previous papers are analyzed. After that, an innovative Gaussian mixture estimator is proposed. On this basis, this paper presents a Gaussian mixture state estimation algorithm based on quantized innovations for WSNs. In order to evaluate and compare the performance of this kind of state estimation algo- rithms for WSNs, the posterior Cram6r-Rao lower bound （CRLB） with quantized innovations is put forward. Performance analysis and simulations show that the proposed Gaussian mixture state estimation algorithm is efficient than the others under the same number of quantization levels and the performance of these algorithms can be benchmarked by the theoretical lower bound.

关键词： Posterior Cramer-Rao lower bounds Quantiation State estimation Target tracking Wireless sensor network

Multiple model particle flter track-before-detect for range ambiguous radar

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Chinese Journal of Aeronautics 2013年第6期26卷 1477-1487页

作者： Wang Guohong Tan Shuncheng Guan Chengbin Wang Na liu zhaolei Institute of Information Fusion Naval Aeronautical and Astronautical University No.92941 Unit 93 Element Nanjing Research Institute of Electronics Technology

The middle pulse repetition frequency（MPRF）and high pulse repetition frequency（HPRF）modes are widely adopted in airborne pulse Doppler（PD）radar systems,which results in the problem that the range measurement of targets is *** existing data processing based range ambiguity resolving methods work well on the condition that the signal-to-noise ratio（SNR）is high *** this paper,a multiple model particle flter（MMPF）based track-beforedetect（TBD）method is proposed to address the problem of target detection and tracking with range ambiguous radar in low-SNR *** introducing a discrete variable that denotes whether a target is present or not and the discrete pulse interval number（PIN）as components of the target state vector,and modeling the incremental variable of the PIN as a three-state Markov chain,the proposed algorithm converts the problem of range ambiguity resolving into a hybrid state fltering *** last,the hybrid fltering problem is implemented by a MMPF-based TBD method in the Bayesian *** results demonstrate that the proposed Bayesian approach can estimate target state as well as the PIN simultaneously,and succeeds in detecting and tracking weak targets with the range ambiguous *** results also show that the performance of the proposed method is superior to that of the multiple hypothesis（MH）method in low-SNR environment.

关键词： Bayesian framework Particle flter Pulse repetition frequency Range ambiguity Signal-to-noise ratio Track-before-detect

Acetate-assistant efficient cation-exchange of halide perovskite nanocrystals to boost the photocatalytic CO_(2) reduction

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Nano Research 2022年第3期15卷 1845-1852页

作者： Jialin Cheng Yanfei Mu Liyuan Wu zhaolei liu Ke Su Guangxing Dong Min Zhang Tongbu Lu MOE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China

The judicious implantation of active metal cations into the surface of semiconductor nanocrystal(NC)through cation-exchange is one of the facile and viable strategies to enhance the activity of catalysts for photocatalytic CO_(2)reduction,by shortening the transfer pathway of photogenerated carriers and increasing the active sites ***,cation-exchange is hard to achieve for halide perovskite NCs owing to the stable octahedron of[PbX6]4−with strong interaction between halogen and ***,we report a facile method to overcome this obstacle by replacing partial Br−with acetate(Ac−)to generate CsPbBr_(3) NC(coded as CsPbBr_(3−x)Ac_(x)).A small amount of Ac−instead of Br−does not change the crystal structure of halide *** to the weaker interaction between acetate and lead in comparison with bromide,the corresponding octahedron structure containing acetate in CsPbBr_(3−x)Ac_(x) can be easily opened to realize efficient cation-exchange with Ni^(2+) *** resulting high loading amount of Ni^(2+) as active site endows CsPbBr_(3−x)Ac_(x) with an improved performance for photocatalytic CO_(2)reduction under visible light irradiation,exhibiting a significantly increased CO yield of 44.09μmol·g^(−1)·h^(−1),which is over 8 and 3 times higher than those of traditional pristine CsPbBr_(3) and nickel doped CsPbBr_(3) NC,*** work provides a critical solution for the efficient metal doping of low-cost halide perovskite NCs to enhance their photocatalytic activity,promoting their practical applications in the field of photocatalysis.

关键词： CO_(2)reduction halide perovskite nanocrystal cation-exchange photocatalysis surface doping

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研究生教育校院二级管理的实施与模式创新

学位与研究生教育 2006年第2期 37-40页

作者：刘兆磊南京农业大学研究生院培养处

实施研究生教育校院二级管理是学校研究生规模发展和质量保证的需要,二级管理的实施需要学校层面为学院提供必要的支撑条件,并且注重在管理观念、实施途径、管理机制和校园文化上的不断创新。

关键词：研究生教育二级管理模式创新

m^(6)A modification of plant virus enables host recognition by NMD factors in plants

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Science China(Life Sciences) 2024年第1期67卷 161-174页

作者： Hao He Linhao Ge Yalin Chen Siwen Zhao zhaolei Li Xueping Zhou Fangfang Li State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China State Key Laboratory of Rice Biology Institute of BiotechnologyZhejiang UniversityHangzhou 310029China

N^(6)-methyladenosine(m^(6)A)is the most abundant eukaryotic mRNA modification and is involved in various biological *** evidence has implicated that m^(6)Amodification is an important anti-viral defense mechanism in mammals and plants,but it is largely unknown how m^(6)Aregulates viral infection in *** we report the dynamic changes and functional anatomy of m^(6)Ain Nicotiana benthamiana and Solanum lycopersicum during Pepino mosaic virus(PepMV)infection.m^(6)Amodification in the PepMV RNA genome is conserved in these two *** of the m^(6)Awriters,mRNA adenosine methylase A(MTA),and HAKAI inhibit the PepMV RNA accumulation accompanied by increased viral m^(6)Amodifications,whereas deficiency of these writers decreases the viral RNA m^(6)Alevels but enhances virus *** study reveals that the cytoplasmic YTH-domain family protein NbECT2A/2B/2C as m^(6)Areaders are involved in anti-viral ***-protein interactions indicate that NbECT2A/2B/2C interact with nonsense-mediated mRNA decay(NMD)-related proteins,including NbUPF3 and NbSMG7,but not with NbUPF1.m^(6)Amodification-mediated restriction to PepMV infection is dependent on NMD-related *** findings provide new insights into the functionality of m^(6)Aanti-viral activity and reveal a distinct immune response that NMD factors recognize the m^(6)Areaders-viral m^(6)ARNA complex for viral RNA degradation to limit virus infection in plants.

关键词： m^(6)A Pepino mosaic virus plant defense m^(6)A readers NMD factors

大学生锻炼意向与行为关系——执行功能的解释作用

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福建师范大学学报（哲学社会科学版） 2020年第3期 131-141,171,172页

作者：杨剑刘赵磊季泰华东师范大学青少年健康评价与运动干预教育部重点实验室上海200241 华东师范大学体育与健康学院上海200241 上海交通大学体育系上海200240

目的:考察计划行为理论模型在大学生群体中的适用性,探究执行功能在锻炼意向与行为联系中的作用,进而为大学生锻炼促进提供理论和实证支撑。方法:采用《计划行为理论量表》《体育活动等级量表》以及Flanker、2-back、More-odd shifting... 详细信息

目的:考察计划行为理论模型在大学生群体中的适用性,探究执行功能在锻炼意向与行为联系中的作用,进而为大学生锻炼促进提供理论和实证支撑。方法:采用《计划行为理论量表》《体育活动等级量表》以及Flanker、2-back、More-odd shifting任务对160名大学生进行调查研究。结果:(1)计划行为理论对锻炼意向和锻炼行为的解释力分别为0.74和0.54。锻炼意向是预测大学生锻炼行为的首要因素。锻炼意向受行为控制感影响最强,其次是锻炼态度,最后是主观规范。(2)执行功能在锻炼意向与锻炼行为之间的调节作用显著,但中介作用不显著,这种调节作用主要是由于执行功能中的抑制功能引起的。结论:计划行为理论在大学生群体中具有较好的适用性;加入执行功能变量后,意向能够更好地预测大学生的锻炼行为。未来研究可基于认知神经科学进一步挖掘其他影响锻炼行为的因素,进而更全面地分析锻炼行为形成和发生机制。

关键词：大学生执行功能计划行为理论锻炼意向锻炼行为

技术进步对玉米生产加工产业耦合协调度的影响研究

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农业经济与管理 2023年第3期 11-24页

作者：刘照磊武卉昕东北农业大学马克思主义学院哈尔滨150030

产业融合发展是农业产业可持续发展的关键,而技术进步是实现产业融合的重要驱动力。基于30个省份2002~2015年面板数据,利用双向固定效应模型,实证分析技术进步对玉米生产加工耦合协调度的影响。结果表明,各省玉米生产加工技术进步对玉... 详细信息

产业融合发展是农业产业可持续发展的关键,而技术进步是实现产业融合的重要驱动力。基于30个省份2002~2015年面板数据,利用双向固定效应模型,实证分析技术进步对玉米生产加工耦合协调度的影响。结果表明,各省玉米生产加工技术进步对玉米生产加工产业耦合协调度产生正向影响;在三大粮食功能区即主产区、主销区和产销平衡区中技术进步水平对玉米生产加工耦合协调度均具有显著正向影响,但存在明显的区域性差异,相对于主产区和产销平衡区,主销区的玉米生产加工技术进步效应更强。为促进玉米生产加工融合发展,提出建立技术推广机制、提升农村基础设施水平、发展规模化的农业社会化服务的政策建议。

关键词：玉米生产加工融合技术进步产业融合

Exploration of the Cultural Connotation of “Traditional Festivals” Eco-Curriculum in Primary Schools

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Journal of Contemporary Educational Research 2024年第6期8卷 274-279页

作者： zhaolei Zhou Xiao Guo Chen Liang Xinyi Street Primary School Hongqi DistrictXinxiang 453000Henan ProvinceChina

Chinese traditional festivals with rich historical and cultural connotations fully reflect Chinese children’s national cultural emotions and *** is of great significance to explore the cultural connotations behind traditional festivals in primary school’s civics and political curriculum,and to cultivate primary school students’traditional cultural identity and increase their cultural self-confidence and patriotism through multi-channel and multi-form innovative educational strategies and curriculum design.

关键词： Traditional festivals eco-curriculum Chinese excellent traditional culture Educational strategy Cultural connotation National self-confidence

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中兽医整体平衡观与猪高热症

畜牧兽医科学（电子版） 2022年第15期 60-61,70页

作者：刘照雷山东省沂水县动物疫病预防控制中心山东临沂276400

随着社会发展水平的不断提升,我国养猪行业的规模逐渐地扩大,同时,各种传染性疾病也开始增多。现阶段在猪场中最常见的病症就是猪高热病,这类疾病具有很强的传染性,主要是由于饲养管理不当导致的,像饲养结构不合理、消毒清理不及时,加... 详细信息

随着社会发展水平的不断提升,我国养猪行业的规模逐渐地扩大,同时,各种传染性疾病也开始增多。现阶段在猪场中最常见的病症就是猪高热病,这类疾病具有很强的传染性,主要是由于饲养管理不当导致的,像饲养结构不合理、消毒清理不及时,加之气候差异引发猪的应激反应,或者致病菌发生变异等都会导致猪群患病。该文从中兽医整体平衡观的角度对猪高热症进行深入的分析,希望可以帮助养猪户更好防治该病。

关键词：猪高热整体平衡观中兽医