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Random vibration of hysteretic systems under Poisson white noise excitations

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Applied Mathematics and Mechanics(English Edition) 2023年第2期44卷 207-220页

作者： Lincong chen zi YUAN Jiamin QIAN J.Q.SUN College of Civil Engineering Huaqiao UniversityXiamen 361021Fujian ProvinceChina Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province Xiamen 361021Fujian ProvinceChina Department of Mechanical Engineering School of EngineeringUniversity of CaliforniaMercedCA 95343U.S.A.

Hysteresis widely exists in civil structures,and dissipates the mechanical energy of *** on the random vibration of hysteretic systems,however,is still insufficient,particularly when the excitation is *** this paper,the radial basis function(RBF)neural network(RBF-NN)method is adopted as a numerical method to investigate the random vibration of the Bouc-Wen hysteretic system under the Poisson white noise *** solution to the reduced generalized Fokker-PlanckKolmogorov(GFPK)equation is expressed in terms of the RBF-NNs with the Gaussian activation functions,whose weights are determined by minimizing the loss function of the reduced GFPK equation residual and constraint associated with the normalization condition.A steel fiber reinforced ceramsite concrete(SFRCC)column loaded by the Poisson white noise is studied as an example to illustrate the solution *** effects of several important parameters of both the system and the excitation on the stochastic response are evaluated,and the obtained results are compared with those obtained by the Monte Carlo simulations(MCSs).The numerical results show that the RBF-NN method can accurately predict the stationary response with a considerable high computational efficiency.

关键词： random vibration Bouc-Wen hysteresis system non-Gaussian excitation Poisson white noise excitation radial basis function(RBF)neural network(RBF-NN)

Method for maneuvering target video frequency tracking based on inductive factor of posture information

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Journal of Systems Engineering and Electronics 2010年第2期21卷 261-267页

作者： Xun chen Lihua Dou juan Zhang Department of Automatic Control School of Information Science and Technology Beijing Institute of Technology Beijing 100081 P. R. China

A method for maneuvering target tracking based on in- ductive factor of posture information is proposed. A distinguished charactedstic of video frequency tracking is that it can capture the target posture changes from its picture easily, and the posture change means the motive model of the target will change. This information is very important to predict the trace of maneuvering target. Based on this idea, the quantified values of the target pos- ture change are obtained using Hough algorithm, this key values are defined as inductive factor of posture information, and then, the multiple grey trace predict models are established and the degrees of fuzzy subordinate values for every model are calculated with the inductive factor, the maneuvering extent values are determined by a new analysis method of stochastic differential equations for each model used to modify the degree of fuzzy subordinate values, these constitute the weighted values for every grey predict collec- tion. Finally, the synthesis predicting weighted result is obtained. The experimental results show that the new method is superior to the conventional algorithm.

关键词： target posture grey prediction hough algodthm de- gree of fuzzy subordinate.

Construction of adaptive redundant multiwavelet packet and its application to compound faults detection of rotating machinery

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Science China(Technological Sciences) 2012年第8期55卷 2083-2090页

作者： chen JingLong zi YanYang HE ZhengJia WANG XiaoDong State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong UniversityXi'an 710049China Technology Center CNPC Logging Co.Xi'an 710077China

It is significant to detect the fault type and assess the fault level as early as possible for avoiding catastrophic *** to diversity and complexity,the compound faults detection of rotating machinery under non-stationary operation turns to be a challenging *** with two or more base functions may match two or more features of compound faults,which may supply a possible solution to compound faults ***,the fixed basis functions of multiwavelet transform,which are not related with the vibration signal,may reduce the accuracy of compound faults ***,the decomposition results of multiwavelet transform not being own time-invariant is harmful to extract the features of periodical ***,multiwavelet transform only focuses on the multi-resolution analysis in the low frequency band,and may leave out the useful features of compound *** overcome these shortcomings,a novel method called adaptive redundant multiwavelet packet(ARMP) is proposed based on the two-scale similarity ***,the relative energy ratio at the characteristic frequency of the concerned component is computed to select the sensitive frequency bands of multiwavelet packet *** proposed method was used to analyze the compound faults of rolling element *** results showed that the proposed method could enhance the ability of compound faults detection of rotating machinery.

关键词： adaptive redundant multiwavelet packet compound faults detection feature extraction rolling element bearing

Predicting CircRNA-Disease Associations Based on Improved Weighted Biased Meta-Structure

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Journal of Computer Science & Technology 2021年第2期36卷 288-298页

作者： Xiu-juan Lei chen Bian Yi Pan School of Computer Science Shaanxi Normal UniversityXi'an 710119China School of Computer Science and Control Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Computer Science Georgia State UniversityAtlantaGA 30302U.S.A

Circular RNAs(circRNAs)are RNAs with a special closed loop structure,which play important roles in tumors and other *** to the time consumption of biological experiments,computational methods for predicting associations between circRNAs and diseases become a better *** the limited number of verified circRNA-disease associations into account,we propose a method named CDWBMS,which integrates a small number of verified circRNA-disease associations with a plenty of circRNA information to discover the novel circRNA-disease *** adopts an improved weighted biased meta-structure search algorithm on a heterogeneous network to predict associations between circRNAs and *** terms of leave-one-out-cross-validation(LOOCV),10-fold cross-validation and 5-fold cross-validation,CDWBMS yields the area under the receiver operating characteristic curve(AUC)values of 0.9216,0.9172 and 0.9005,***,case studies show that CDWBMS can predict unknow circRNA-disease *** conclusion,CDWBMS is an effective method for exploring disease-related circRNAs.

关键词： circular RNA(circRNA) circRNA-disease association meta-structure heterogeneous network

Bilateral lung transplantation,a new option for pulmonary metastasis from hepatocellular carcinoma?

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Hepatobiliary & Pancreatic Diseases International 2023年第1期22卷 96-98页

作者： zi-Tao Wang Jing-Yu chen Department of Thoracic Surgery Wuxi Lung Transplant CenterWuxi People’s Hospital Affiliated to Nanjing Medical UniversityWuxi 214023China Department of Lung Transplant the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China

To the Editor:The lung is the most frequent site of extrahepatic hepatocellular carcinoma(HCC)recurrence after liver transplantation(LT).Pulmonary metastasis from hepatocellular carcinoma(PM-HCC)carries a poor prognosis as the patient could finally die of pulmonary failure secondary to the tumor despite maintaining ideal liver function.

关键词： metastasis hepatocellular lung

Perioperative Risk Factors for Post-operative Pneumonia after Type A Acute Aortic Dissection Surgery

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Current Medical Science 2023年第1期43卷 69-79页

作者： Li-juan HUA Lu-xia KONG Jian-nan HU Qian LIU chen BAO Chao LIU zi-ling LI Jun chen Shu-yun XU Department of Respiratory and Critical Care Medicine Key Laboratory of Pulmonary Diseases of Health MinistryTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Department of Respiratory and Critical Care Medicine Taikang Tongji(Wuhan)HospitalWuhan430050China Department of Cardiovascular Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

Objective Type A acute aortic dissection(TAAAD)is a dangerous and complicated condition with a high death rate before hospital *** who are fortunate to receive prompt surgical treatment still face high in-hospital mortality.A series of post-operative complications further affects the ***-operative pneumonia(POP)also leads to great morbidity and *** study aimed to identify the prevalence as well as the risk factors for POP in TAAAD patients and offer references for clinical decisions to further improve the prognosis of patients who survived the surgical *** The study enrolled 89 TAAAD patients who underwent surgical treatment in Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan,Hubei province,China from December 2020 to July 2021 and analyzed the perioperative data and outcomes of these *** regression analyses were used to identify the risk factors for *** In the study,31.5%of patients developed *** with POP had higher proportions of severe oxygenation damage,pneumothorax,reintubation,tracheotomy,renal replacement therapy,arrhythmia,gastrointestinal bleeding,and longer duration of mechanical ventilation,fever,ICU stay,and length of stay(all with P<0.05).The in-hospital mortality was 2.3%.Smoking,preoperative white blood cells,and intraoperative transfusion were the independent risk factors for POP in *** Patients who underwent TAAAD surgery suffered poorer outcomes when they developed ***,patients with risk factors should be treated with caution.

关键词： cardiovascular surgery type A acute aortic dissection post-operative pneumonia risk factors

Anaplastic lymphoma kinase-negative anaplastic large cell lymphoma masquerading as Behcet’s disease: A case report and review of literature

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World Journal of Clinical Cases 2019年第20期7卷 3377-3383页

作者： juan Luo Ying-Han Jiang zi Lei Ying-Lei Miao Department of Gastroenterology the First Affiliated Hospital of Kunming Medical UniversityInstitute of Digestive DiseaseKunming 650000Yunnan ProvinceChina Department of Pathology the First People’s Hospital of Yunnan ProvinceKunming 650000Yunnan ProvinceChina Department of Pathology the First Affiliated Hospital of Kunming Medical UniversityKunming 650000Yunnan ProvinceChina

BACKGROUND Anaplastic large cell lymphoma(ALCL)is a CD30-positive T cell lymphoma,a rare type of non-Hodgkin *** current World Health Organization classification system divides ALCLs into anaplastic lymphoma kinase(ALK)-positive and ALK-negative *** rarely presents in the gastrointestinal *** SUMMARY A 54-year-old male was admitted to the department of gastroenterology for abdominal *** presented with lower abdominal pain,diarrhea and recurrent oral and penile *** was misdiagnosed with Behcet's disease and treated with *** after one month,he was hospitalized in another hospital for *** time,the lesion on the penis was biopsied for histological *** final pathological diagnosis was ALCL,*** patient was treated with cyclophosphamide,doxorubicin,vincristine,prednisolone ***,he died within one *** Gastrointestinal ALCL needs to be considered in the differential diagnosis to avoid delaying *** biopsy is the most important for early diagnosis and treatment.

关键词： Anaplastic large cell lymphoma Anaplastic lymphoma kinase Behcet's disease Colon ulcer Penis ulcer Case report

One-pot synthesis and optical properties of In- and Sn-doped ZnO nanoparticles

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International Journal of Minerals,Metallurgy and Materials 2017年第4期24卷 455-461页

作者： Li-ping Wang Fu Zhang Shuai chen zi-heng Bai Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Colloidal indium-doped zinc oxide (IZO) and tin-doped zinc oxide (ZTO) nanoparticles were successfully prepared in organic solution, with metal acetylacetonate as the precursor and oleylamine as the solvent. The crystal and optical properties were characterized by X-ray diffraction, UV−visible spectrophotometry, and fluorescence spectroscopy, respectively; the surface and structure morphologies were observed by scanning electron microscopy and transmission electron microscopy. The XRD patterns of the IZO and ZTO nanoparticles all exhibited similar diffraction peaks consistent with the standard XRD pattern of ZnO, although the diffraction peaks of the IZO and ZTO nanoparticles were slightly shifted with increasing dopant concentration. With increasing dopant concentration, the fluorescent emission peaks of the IZO nanoparticles exhibited an obvious red shift because of the difference in atomic radii of indium and zinc, whereas those of the ZTO nanoparticles exhibited almost no shift because of the similarity in atomic radii of tin and zinc. Furthermore, the sizes of the IZO and ZTO nanoparticles distributed in the ranges 20–40 and 20–25 nm, respectively, which is attributed to the difference in ionic radii of indium and tin. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.

关键词： Crystal structure Doping (additives) Electron microscopy Fluorescence Fluorescence spectroscopy High resolution transmission electron microscopy Indium Metal nanoparticles Nanoparticles Optical properties Scanning electron microscopy Semiconductor doping Tin Tin oxides Transmission electron microscopy X ray diffraction zinc zinc oxide

How to rectify the misuse of scientific names in bioscience?

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Chinese Science Bulletin 2014年第13期59卷 1479-1481页

作者： zi-Min Hu Lopez-Bautista juan De-Lin Duan Institute of Oceanology Chinese Academy of Sciences Department of Biological Sciences The University of Alabama

The misuse of scientific names for species of organisms is a widespread and long-standing academic phenomenon;however,its negative impacts to scientific community and the public have been largely overlooked all *** we exemplified two research cases in seaweeds to highlight the extent and dimension of misused scientific names of species in bioscience,and present a few feasible measurements to rectify such a *** ultimate goal is to create a discussion platform and to draw deserved attention of scientific name to taxonomy-related scientists.

关键词：生物科学名称误用纠正生物物种科学家分类学海藻