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Analysis of vibration and frequency transmission of high speed EMU with flexible model

Acta Mechanica Sinica 2014年第6期30卷 876-883页

作者： Zun-Song Ren Guang yang Shan-Shan wang Shou-Guang Sun School of Mechanical Electronic & Control EngineeringBeijing Jiaotong University

When the operation speed of the high-speed train increases and the weight of the carbody becomes lighter,not only does the sensitivity of the wheel/rail contact get higher,but also the vibration frequency range of the vehicle system gets enlarged and more frequencies are transmitted from the wheelset to the *** is important to investigate the vibration characteristics and the dynamic frequency transmission from the wheel/rail interface to the carbody of the high-speed electric multi-uint（EMU）.An elastic highspeed vehicle dynamics model is established in which the carbody,bogieframes,and wheelsets are all dealt with as flexible body.A rigid high-speed vehicle dynamics model is set up to compare with the simulation results of the elastic *** the rigid vehicle model,the carbody,bogieframes and wheelsets are treated as rigid component while the suspension and structure parameters are the same as used in the elastic *** dynamic characteristic of the elastic high speed vehicle is investigated in time and frequency domains and the di ff erence of the acceleration,frequency distribution and transmission of the two types of models are *** results show that the spectrum power density of the vehicle decreases from the wheelset to the carbody and the acceleration transmission ratio is approximately from 1%to 10%for each suspension *** frequency of the wheelset rotation is evident in the vibration of the flexible model and is transmitted from the wheelset to the bogieframe and to *** results of the flexible model are more reasonable than that of the rigid model.A field test data of the high speed train are presented to verify the simulation *** shows that the simulation results are coincident with the field test data.

关键词： High-speed EMU Vibration transmission Flexible model Acceleration Power spectrum density

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Silicon photonic network-on-chip and enabling components

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Science China Technological Sciences 2013年第3期56卷 543-553页

作者： HU Ting QIU Chen YU Ping yang LongZhi wang WanJun JIANG XiaoQing yang Mei ZHANG Lei yang JianYi Department of Information Science and Electronics Engineering and Cyrus Tang Center for Sensor Materials and Applications Zhejiang University Department of Electrical and Computer Engineering University of NevadaLas VegasNevada 89154USA Department of Engineering and Aviation Sciences University of Maryland Eastern Shore Princess AnneMD 21853USA

As the transistor’s feature scales down and the integration density of the monolithic circuit increases continuously,the traditional metal interconnects face significant performance limitation to meet the stringent demands of high-speed,low-power and low-latency data transmission for on-and off-chip *** technology is poised to resolve these *** to the complementary metal-oxide-semiconductor(CMOS) compatible process,silicon photonics is the leading candidate *** photonic devices and networks have been improved dramatically in recent years,with a notable increase in bandwidth from the megahertz to the multi-gigahertz regime in just over half a *** paper reviews the recent developments in silicon photonics for optical interconnects and summarizes the work of our laboratory in this research field.

关键词： interconnects optical technology complementary metal-oxide-semiconductor(CMOS) silicon photonics

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Emerging theory and phenomena in thermal conduction: A selective review

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Science China(Physics,Mechanics & Astronomy) 2022年第11期65卷 2-17页

作者： Jie Chen Jia He Dongkai Pan Xiaotian wang Nuo yang Jiaojiao Zhu Shengyuan A.yang Gang Zhang Center for Phononics and Thermal Energy Science China-EU Joint Lab for NanophononicsMOE Key Laboratory of Advanced Microstructured MaterialsSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China School of Energy and Power Engineering Huazhong University of Science and Technology(HUST)Wuhan 430074China School of Physical Science and Technology Southwest UniversityChongqing 400715China Research Laboratory for Quantum Materials Singapore University of Technology and DesignSingapore 487372Singapore Institute of High Performance Computing Agency for ScienceTechnology and Research(A*STAR)Singapore 138632Singapore

Recently, emerging phonon phenomena have been discovered and rapidly developed, which have become an active hot research topic. In this review article, we present state-of-the-art advances in several fascinating phonon transport phenomena. First, we summarize the recent progress on the wave nature of phonons, including phonon coherence and its effects on thermal conductivity and the topological properties of phonons. Then, we discuss the particle nature of phonons, including the weak coupling of phonons and the high-order phonon anharmonicity. Finally, we present the summary and a brief outlook. This review presents the advanced understanding of some emerging phonon phenomena in solid materials, which provides new opportunities for further advancement in a wide variety of applications.

关键词： phonon transport coherence topological phonon high-order phonon interaction

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Transcriptomic analysis on cucumber tendril reveals GLRs play important roles in thigmotropism and thigmomorphogenesis

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Horticultural Plant Journal 2024年第5期10卷 1177-1186页

作者： Mengzhuo Zhang Bowen wang Shenhao wang Tongxu Xin Keyi Ye Sanwen Huang Xueyong yang State Key Laboratory of Vegetable Biobreeding Institute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong 518120China College of Horticulture Northwest A&F UniversityYanglingShaanxi 712100China

Thigmotropism and thigmomorphogenesis are two related and pervasive processes that play crucial roles in plant adaptation to the ***,there have been few investigations into the molecular regulatory mechanisms of these ***(Cucumis sativus L.)tendrils are ideal material for studying thigmotropism and thigmomorphogenesis because they display a combination of the two ***,we generated the transcriptome profiles of cucumber tendrils at the young,stretch,and coiling *** related to receptor proteins,transmembrane transport,and ion transport were significantly enriched among those differentially expressed between *** assays illustrated that three GLUTAMATE RECEPTOR(GLR)genes might play a vital function in perceiving or transducing touch stimulation *** the transcriptomes of tendrils and roots after touch stimulation,we found that genes related to extracellular stimulus and xyloglucan metabolism might have conserved functions in the regulation of *** transcriptome atlas of thigmotropism and thigmomorphogenesis of cucumber tendrils constructed in this study will help further elucidate the molecular mechanisms behind these processes.

关键词： Cucumber Thigmotropism Thigmomorphogenesis Transcriptome Tendril GLUTAMATE RECEPTOR

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Effect of spinal manipulation on degenerative scoliosis

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Journal of Traditional Chinese Medicine 2020年第6期40卷 1033-1040页

作者： Sun Wu Gao Jinghua Zhu Liguo wang Baojian Xiao Wei wang Zhenzhong yang Kexin Spine Department 2 Wangjing Hospital of China Academy of Chinese Medical SciencesBeijing 100102China State Key Laboratory of Pharmaceutical New-Tech for Chinese Medicine Jiangsu Kanion Pharmaceutical Co.Ltdv Lianyungang 222001Jiangsu ProvinceChina

OBJECTIVE:To investigate the effect of spinal manipulation(SM)on degenerative scoliosis by evaluating patients’visual analog scale(VAS)scores,Cobb angles,sagittal vertical axis(SVA),and apical vertebral rotation(AVR)and to explore factors that influence treatment ***:A total of 55 patients with degenerative scoliosis received 4 weeks of *** treatment,patients were divided into two groups:the remission group(VAS score<40 mm)and the non-remission group(VAS score≥40 mm).Pre-versus post-treatment VAS scores,Cobb angles,SVA,and AVR were compared in each group and in the total *** data(sex,age,symptom characteristics,duration of symptoms,VAS score,Cobb angle,SVA,and AVR)were compared between *** influencing the post-treatment VAS score were explored with multiple linear regression ***:No changes were found in the Cobb angle(P=0.722)or AVR(P=0.424)after intervention in the overall ***,the SVA(P<0.001)and VAS score(P=0.000)changed significantly after *** changes were observed in the remission group(n=29).Multiple linear regression revealed that the only factors influencing treatment effect were symptom characteristics,SVA,and VAS ***:SM relieved pain and improved sagittal imbalance in patients with degenerative *** did not lessen the severity of coronal curvature or vertebral *** influencing the effect of SM included symptom characteristics,VAS score,and SVA.A larger randomized trial is needed to further confirm our results.

关键词： Manipulation spinal Scoliosis Cobb angle Sagittal vertical axis Apical vertebral rotation

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Synthesis and structure-insecticidal activity relationship of novel phenylpyrazole carboxylic acid derivatives containing fluorine moiety

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Chinese Chemical Letters 2020年第3期31卷 739-745页

作者： Baolei wang Hongxue wang Hang Liu Lixia Xiong Na yang Yan Zhang Zhengming Li State Key Laboratory of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin 300071China

A series of novel phenylpyrazole carboxylic acid derivatives containing fluorine moiety,i.e.,diamides 11,simple aryl-bearing amides 12 and acylthioureas 14 were successfully synthesized based on the key fluo ro-containing phe nylpyrazole acid *** new compounds were identified and confirmed by melting point,1H NMR,13C NMR and elemental analysis or *** bioassay results indicated that some of the compounds possessed excellent insecticidal activities towards oriental armyworm,diamondback moth and corn borer at low *** examples,compounds 11a,11e-g and 14b exhibited remarkable larvicidal activities with LC50 values of 0.13-0.39 mg/L and 0.0002-0.0014 mg/L against oriental armyworm and diamondback moth,respectively,were comparable with those of the control ***,lie were found superior to chlorantraniliprole in oriental armyworm tests(LC50:0.23 mg/L vs.0.26 mg/L);11a,lie,11f and 14c in diamondback moth tests with LC50 values of 0.0002 mg/L,0.0002 mg/L,0.0008 mg/L and 0.0005 mg/L,respectively,we re more effective than that of *** addition,12 a also showed a promising insecticidal potential and development/optimization *** 11a,lle-g,12a,14b and 14c could be considered as possible new leading structures for further *** SAR investigation indicated that the compounds with fluorine motif(e.g.,-F,-CF2H,-CF3)held apparently favorable insecticidal potentials,which provided useful guidance for further design/development of new phenylpyrazole-containing agrochemicals.

关键词： Phenylpyrazole carboxylic acid derivatives Fluorochemicals Synthesis Insecticidal activity Structure-activity relationship

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Therapeutic mechanisms of integrated traditional Chinese and conventional medicine underlying its treatment of precancerous lesions of gastric cancer

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Journal of Traditional Chinese Medicine 2022年第6期42卷 1023-1028页

作者： XU Qing wang yang LI Zhongyu YAN Jiaxing ZHAO Yingpan wang Ping WEN Yandong Institute of Digestive Diseases Xiyuan Hospital of China Academy of Chinese Medical SciencesBeijing 100091China Eye Hospital of China Academy of Chinese Medical Sciences Beijing 100040China

China has a high incidence of gastric cancer. Secondary prevention of gastric cancer is a major public health problem that must be solved urgently. Modern medicine focuses on the pathogenesis of precancerous lesions of gastric cancer(PLGC), and it has been found that there are a variety of abnormal gene expression patterns in PLGC. This study summarizes recent advances in our understanding of the therapeutic mechanisms of PLGC from various clinical studies;this will provide a reference for studying the therapeutic mechanisms of Traditional Chinese Medicine in the treatment of PLGC from the combined points of view of Traditional Chinese and Conventional medicine.

关键词： stomach neoplasms precancerous lesions mechanisms integrative medicine review

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A drawstring triboelectric nanogenerator with modular electrodes for harvesting wave energy

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Nano Research 2023年第8期16卷 10931-10937页

作者： Da Zhao Hengyu Li Jianlong wang Qi Gao yang Yu Jianming Wen Zhong Lin wang Tinghai Cheng School of Mechatronic Engineering Changchun University of TechnologyChangchun 130012China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China College of Engineering Zhejiang Normal UniversityJinhua 321004China Georgia Institute of Technology AtlantaGA 30332-0245USA

The development and utilization of marine blue energy has become the focus of current research.A drawstring triboelectric nanogenerator with modular electrodes(DS-TENG)is proposed to harvest wave *** displacement and water wave adaptability are improved by using the drawstring structure in the ***,the modular electrode design is applied to improve the durability and replaceability of the generation *** rationality of the structure is verified by theoretical analysis,and performance experiments on the fundamental output,displacement and frequency,durability and application are carried *** DS-TENG can achieve output performance of 98.03 nC,3.63μA,238.50 V and 923.92µW at 150 mm and 1.0 *** addition,the performance drops by 6.11%after 110,000 cycles for DS-TENG *** paper will provide reference for the design of TENG that adapts to a wide range of wave heights.

关键词： triboelectric nanogenerator wave energy harvesting drawstring modular electrodes motion displacement

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Quantified evaluation of particle shape effects from micro-to-macro scales for non-convex grains

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Particuology 2016年第2期14卷 23-35页

作者： Y. yang J.F. wang Y.M. Cheng Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hong Kong China Department of Civil and Architectural Engineering City University of Hong Kong Hong Kong China

Particle shape plays an important role in both the micro and macro scales responses of a granular assem- bly. This paper presents a systematic way to interpret the shape effects of granular material during quasi-static shearing. A more suitable shape descriptor is suggested for the quantitative analysis of the macroscale strength indexes and contact parameters for non-convex grains, with special consid- eration given to the peak state and critical state. Through a series of numerical simulations and related post-processing analysis, particle shape is found to directly influence the strain localisation patterns, microscale fabric distributions, microscale mobilisation indexes, and probability distribution of the nor- malised contact normal force. Additionally, the accuracy of the stress-force-fabric relationship can be influenced by the average normal force and the distribution of contact vectors. Moreover, particle shape plays a more important role than do the confining pressures in determining the friction angle. Strong force chains and the dilation effect are also found to be strongly influenced by the high confinin~ oressure.

关键词： Quantitative analysis Shape factor Statistical analysis Micro-macro indexes

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Genome-wide characterization of MATE family members in Cucumis melo *** their expression profiles in response to abiotic and biotic stress

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Horticultural Plant Journal 2022年第4期8卷 474-488页

作者： Shuoshuo wang Kun Chen Jiayu Zhang Jianquan wang Haosen Li Xiaoyu yang Qinghua Shi College of Horticulture Science and Engineering Shandong Agricultural UniversityTai’anShandong 271018China State Key Laboratory of Crop Biology Shandong Agricultural UniversityTai’anShandong 271018China Institute of Vegetables Shangqiu Academy of Agriculture and Forestry SciencesShangqiuHenan 476002China

The multidrug and toxic compound extrusion(MATE) family plays pivotal roles in the detoxification process in plants, while no information has been provided for this gene family in melon(Cucumis melo L.) thus far, limiting our understanding of its functions in melon acclimation to stressful environments. In this study, a total of 39 MATEs(CmMATE1–CmMATE39) were observed in the melon genome;these were unevenly distributed in all chromosomes, with the most on Chromosome 1. Based on their orthologous relationship with those from Arabidopsis, rice, and sorghum, melon MATEs were clustered into three subfamilies of Clades Ⅰ, Ⅱ, and Ⅲ, wherein 23, 9, and 7 members were included, *** exon number was observed in CmMATEs, and the most were harbored by CmMATE8. Gene ontology(GO) term and cis-regulatory element(CRE) analyses pointed to the potential roles of CmMATEs in both the regulation of melon development and acclimation to various abiotic and biotic stressors. The RNA-seq and qRT-PCR(quantitative real-time PCR) results demonstrated that under normal growth conditions, CmMATEs were expressed in a tissue-and development-specific manner, while their abundance apparently varied in a stress-dependent manner when melon plants were exposed to unfavorable environmental conditions. Altogether, these observations could expand our knowledge about the plant MATE family and benefit functional genomics analysis for CmMATEs in the future.

关键词： Melon MATE Orthologous relationship GO term Expression Stress

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