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基于VMD和CNN的滚动轴承故障定量诊断方法

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中国科技论文 2020年第7期15卷 735-742页

作者：吕阳廖与禾王报祥薛久涛西安交通大学现代设计及转子轴承系统教育部重点实验室西安710049 西安交通大学陕西省机械产品质量保障与诊断重点实验室西安710049

针对滚动轴承故障尺寸难以定量诊断的问题,提出了变分模态分解(variational mode decomposition,VMD)和卷积神经网络(convolutional neural networks,CNN)相结合的诊断方法。首先对带有不同故障尺寸滚动轴承的运行进行监测,得到1个与滚... 详细信息

针对滚动轴承故障尺寸难以定量诊断的问题,提出了变分模态分解(variational mode decomposition,VMD)和卷积神经网络(convolutional neural networks,CNN)相结合的诊断方法。首先对带有不同故障尺寸滚动轴承的运行进行监测,得到1个与滚动轴承故障尺寸有关的数据库;然后对数据进行VMD,提取有效的训练模式分量,并去除噪声等的干扰;最后将训练模式分量置入CNN进行训练,得到能对滚动轴承故障尺寸进行预测的网络模型。实验结果表明,所提方法可有效实现对滚动轴承的定量诊断。

关键词：故障诊断滚动轴承变分模态分解卷积神经网络定量诊断

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儿童克罗恩病差异表达基因的生物信息学分析

中国现代应用药学 2020年第17期37卷 2148-2152页

作者：刘迎春梅红高源王宝香赵玉霞华中科技大学同济医学院附属武汉儿童医院(武汉市妇幼保健院)消化内科武汉430014

目的应用生物信息学方法探讨儿童克罗恩病的差异表达基因,为阐明儿童克罗恩病的发病机制及干预靶点提供新思路。方法从公共基因表达数据库(Gene Expression Omnibus,GEO)下载儿童克罗恩病相关的基因芯片数据集GSE9686,使用在线分析工具G... 详细信息

目的应用生物信息学方法探讨儿童克罗恩病的差异表达基因,为阐明儿童克罗恩病的发病机制及干预靶点提供新思路。方法从公共基因表达数据库(Gene Expression Omnibus,GEO)下载儿童克罗恩病相关的基因芯片数据集GSE9686,使用在线分析工具GEO2R筛选出儿童克罗恩病结肠组织与正常结肠组织的差异表达基因。使用数据库DAVID对差异表达基因进行GO功能注释和KEGG通路分析,使用STRING数据库进行蛋白互作网络(PPI)分析,使用Cytoscape筛选出儿童克罗恩病的关键基因。结果筛选出85个儿童克罗恩病差异表达基因,包括63个上调基因和22个下调基因。GO分析揭示差异表达基因主要富集于趋化因子活性、CXCR趋化因子受体结合、细胞外空间、细胞外区域、趋化因子介导的信号通路及炎症反应等过程,KEGG分析揭示差异表达基因主要富集于细胞因子-细胞因子受体相互作用、趋化因子信号通路、TNF信号通路等。Cytoscape筛选出了15个关键基因,所有关键基因在儿童克罗恩病结肠组织中表达均上调。结论采用生物信息学对儿童克罗恩病结肠组织与正常结肠组织的差异表达基因进行综合分析,可为儿童克罗恩病的早期诊断及靶向治疗提供新的理论依据。

关键词：生物信息学儿童克罗恩病差异表达基因

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帮助恐怖活动罪认定之初探

山西广播电视大学学报 2018年第1期23卷 54-57页

作者：魏瑾王宝香东北财经大学法学院辽宁大连116025 人民论坛杂志社北京100733

近年来,恐怖犯罪的范围有扩大的趋势,帮助恐怖活动犯罪表现形式不断变化。我们需要进一步在法治的层面上加以规制。联系帮助恐怖活动犯罪典型案例,深入分析刑法修正九的有关条款。重点研究帮助恐怖活动罪的犯罪构成、犯罪停止阶段、罪... 详细信息

近年来,恐怖犯罪的范围有扩大的趋势,帮助恐怖活动犯罪表现形式不断变化。我们需要进一步在法治的层面上加以规制。联系帮助恐怖活动犯罪典型案例,深入分析刑法修正九的有关条款。重点研究帮助恐怖活动罪的犯罪构成、犯罪停止阶段、罪数形态以及共同犯罪,探索了主观方面也存在间接故意的新情况和新问题。同时剖析"招募"行为与组织、领导、参加恐怖组织罪的"组织"行为的区别,进一步提出存在的问题及建议,做到早期介入、提前遏制恐怖犯罪势态的发生。

关键词：帮助恐怖活动罪帮助行为正犯化间接故意犯罪构成

Genomic survey, characterization and expression profile analysis of the 3-phosphoglycerate dehydrogenase family in rice（Oryza sativa L.）

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Genomic survey, characterization and expression profile anal...

江苏省遗传学会2019年学术研讨会

作者： baoxiang wang Tao Guo Haifeng wang Jingfang Li Zhiguang Sun Yan Liu Yungao Xing Bo Xu Bo Yang Jian Li Ming Chi Jinbo Liu Tingmu Chen Guanglong Zhu Dayong Xu Lianyungang Academy of Agricultural Science Shandong Rice Research Institute/Shandong Rice Engineering Technology Research Center Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China Yangzhou University

The synthesis of serine in rice is intangible, and little kinetic and structural information is available for most enzymes in the pathway. In this study, we carried out a comprehensive characteristic and phylogenetic analysis of three 3-phosphoglycerate dehydrogenase（PGDH） members in rice, as well as an analysis of their whole-life expression patterns. All of the OsPGDHs have three highly conserved motifs. The three genes were detected in all tissues and development stages in Nipponbare by qRT-PCR. Under abiotic stresses, such as salt（150 mM NaCl）, drought（20% PEG 4000 simulation）, oxidation（10 mM H2O2） and low temperature（4±1 ℃）, the expressions of all OsPGDHs are significantly different. These investigations improve our understanding of the importance of the OsPGDH family and provide useful information about the phosphorylated serine biosynthesis pathway in rice.

关键词： 3-phosphoglycerate dehydrogenase rice abiotic stresses Serine

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教育信息化背景下高校智慧实验室的构建研究

现代信息科技 2021年第9期5卷 175-178,184页

作者：王宝祥潘超河南开封科技传媒学院河南开封475004

实验室是锻炼学生动手能力,增强实践能力和科研能力的重要场所。智慧实验室是未来实验室发展的必然趋势,近年来引起各大高校的广泛关注。文章分析了传统高校实验室管理和使用过程中存在的问题,深入研究了智慧实验室的体系框架及构建的... 详细信息

实验室是锻炼学生动手能力,增强实践能力和科研能力的重要场所。智慧实验室是未来实验室发展的必然趋势,近年来引起各大高校的广泛关注。文章分析了传统高校实验室管理和使用过程中存在的问题,深入研究了智慧实验室的体系框架及构建的关键技术,基于新一代信息技术设计了一套智慧实验室的构建技术方案,以期为高校智慧实验室的建设和研究提供借鉴。

关键词：教育信息化高校智慧实验室实验室建设

Genetic variation of drought resistance of rice genotypes released in China

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Genetic variation of drought resistance of rice genotypes re...

Swarm intention identification via dynamic distribution probability image

2018中国遗传学会第十次全国会员代表大会暨学术讨论会

作者： baoxiang wang Bo Xu Yan Liu Xubing Chen Wenfang Zhi Yungao Xing Bo Yang Jian Li Ming Chi Jinbo Liu Tingmu Chen Dayong Xu Guanglong Zhu Lianyungang Academy of Agricultural Science Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China Yangzhou University

Drought is the most serious factor limiting rice production worldwide and it is becoming intensively with climate change in recent years. Therefore, to screen and breed drought tolerant rice genotype is essential to maintain yield gain and ensure food security under adversity environment. However, thus far, little attention has given to the temporal changes of drought resistance concomitant with the year of release in rice genetic breeding. Therefore, the objective of this study was to explore the variation of drought resistance of rice genotypes with year of release in field experiment. Sixteen rice(Oryza sativa L.) genotypes bred or widely cultivated from 1934 to 2007 were grown in paddy field(with normal water condition, CK) and upland field(drought stress, DT). Grain yield and daily grain yield were significantly increased with the year of release. The genetic improvements in the grain yield partially resulted from the significant increase in panicle, spikelets per panicle and filling percentage. In addition, various growth related characteristics like biomass, harvest index(HI), relative growth rate(RGR), grain density and growth duration increased with increase of genetic refinement of the genotypes through the years and they contributed to improvement of final rice yields. However, grain yield, yield components and these growth related traits sharply declined under drought stress. Furthermore, the drought resistance coefficients of K

关键词： Grain yield drought resistance drought resistance coefficient Genetic improvement Rice

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Chinese Journal of Aeronautics 2024年第10期37卷 380-392页

作者： Yinhan wang Jiang wang Shaoming HE Fei wang Qi wang School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China

In the realm of decision-making for defense and security applications,it is paramount to swiftly and accurately identify the intentions of incoming *** identification methods predominantly focus on single-target applications and overlook the perturbations introduced by measurement *** this study,we propose a novel concept:the Dynamic Distribution Probability(DDP)image,which is constructed using the estimated state and its covariance *** grayscale pixel value within the image signifies the probability of the presence of the agent within the *** proposed identification scheme integrates the use of Extended Kalman Filter(EKF),Convolutional Neural Network(CNN),Back Propagation(BP)network,and Gated Recurrent Unit(GRU)***,the DDP image is processed through a CNN to distill the formation characteristics,and the estimated swarm state from EKF is inputted into a BP network to deduce the kinematic *** outputs from both networks are summed and subsequently channeled into a GRU network to capture temporal *** numerical simulations and flight experiments are presented to demonstrate the robust anti-noise capability of the proposed scheme compared with conventional methods,as well as its superior training efficiency.

关键词： Intention Identification Kalman filters Convolutional neural networks Swarm intelligence

The reformation of catalyst:From a trial-and-error synthesis to rational design

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Nano Research 2024年第4期17卷 3261-3301页

作者： Ligang wang Jiabin Wu Shunwu wang Huan Liu Yao wang Dingsheng wang Department of Chemistry Tsinghua UniversityBeijing 100084China

The appropriate catalysts can accelerate the reaction rate and effectively boost the efficient conversion of various molecules,which is of great importance in the study of chemistry,chemical industry,energy,materials and environmental ***,efficient,environmentally friendly,and easy to operate synthesis methods have been used to prepare various types of *** previous studies have reported the synthesis and characterization of the aforementioned catalysts,more still remain in trial and error methods,without in-depth consideration and improvement of traditional synthesis ***,we comprehensively summarize and compare the preparation methods of the trial-and-error synthesis strategy,structure–activity relationships and density functional theory(DFT)guided catalysts rational design for nanomaterials and atomically dispersed *** also discuss in detail the utilization of the nanomaterials and single atom catalysts for converting small molecules(H_(2)O,O_(2),CO_(2),N_(2),etc.)into value-added products driven by electrocatalysis,photocatalysis,and ***,the challenges and outlooks of mass preparation and production of efficient and green catalysts through conventional trial and error synthesis and DFT theory are featured in accordance with its current development.

关键词： trial-and-error synthesis structure–activity relationships density functional theory(DFT)guidance nanomaterials atomically dispersed catalysts

Numerical Analysis of PRISM-PY Calculations for Hard-and Soft-Core Generic Polymer Models

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Chinese Journal of Polymer Science 2024年第4期42卷 532-543页

作者： Qiang wang Department of Chemical and Biological Engineering Colorado State University1370 Campus DeliveryFort CollinsCO80523-1370USA

Generic polymer models capturing the chain connectivity and excluded-volume interactions between polymer segments can be classified, according to whether or not the 3D integral of the latter diverges, into hard- and soft-core models. Taking homogeneous systems of compressible homopolymer melts (or equivalently homopolymer solutions in an implicit, good solvent) in the continuum as an example, we recently compared the correlation effects on the structural and thermodynamic properties of the hard- and soft-core models given by the polymer reference interaction site model (PRISM) theory with the Percus-Yevick (PY) closure (Polymers 2023, 15, 1180). Here we analyzed in detail the numerical errors and behavior of the interchain pair correlation functions (PCFs) given by the PRISM-PY calculations of these models using an efficient numerical approach that we proposed. Our numerical approach has the least number of independent variables to be iteratively solved, analytically treats the discontinuities caused by the non-bonded pair potential (such as that of the hard spheres) and takes only the inverse Fourier transform of the interchain indirect PCF between polymer segments (which is continuous and decays towards 0 with increasing wavenumber much faster than both the interchain direct and total PCFs), and is essential for us to accurately solve the PRISM-PY theory for chain length N as large as 106. To capture the correlation-hole effect, the real-space cut-off in the PRISM calculations should be proportional to the square root of N.

关键词： Generic polymer models Soft potentials Polymer reference interaction site model theory