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Life Prediction Based on Transient Dynamics Analysis of Van Semi-trailer with Air Suspension System

Chinese Journal of Mechanical Engineering 2011年第3期24卷 372-379页

作者： LI Liang song Jian he lin ZHANG Mengjun LI Hongzhi State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China

The early fatigue damage in the van-body of the semi-trailer is often caused by the unique mechanical characteristics and the dynamic impact of the *** traditional finite element method with static strength analysis cannot support the fatigue design of van-body;thus,the dynamics analysis should be adopted for the endurance *** accurate dynamics model to describe the transient impacts of all kinds of uneven road and the proper system transfer functions to calculate the load transfer effects from tire to van-body are two critical factors for transient dynamics *** order to evaluate the dynamic performance,the dynamics model of the trailer with the air suspension is brought *** the analysis method of the power spectral density （PSD） is set up to study the transient responses of the road dynamic *** transient responses transferred from axles to van-body are calculated,such as dynamic stress,dynamic RMS acceleration,and dynamic load *** on the above dynamic responses,the fatigue life of van-body is predicted with the finite element analysis （FEA） *** the test parameters of the trailer with air suspension,the simulation system with Matlab/Simulink is constructed to describe the dynamic responses of the impacts of the tested PSD of the vehicle axles,and then the fatigue life is predicted with FEA *** simulated results show that the vibration level of the van-body with air suspension is reduced and the fatigue life is *** real vehicle tests on different roads are carried out,and the test results validate the accuracy of the simulation *** proposed fatigue life prediction method is effective for the virtual design of auto-body.

关键词： van-body air suspension system transient dynamics power spectral density (PSD) life prediction

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Prediction of hot-rolled strip crown based on Boruta and extremely randomized trees algorithms

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Journal of Iron and Steel Research International 2023年第5期30卷 1022-1031页

作者： Li Wang song-lin he Zhi-ting Zhao Xian-du Zhang School of Mechanical and Power Engineering Shenyang University of Chemical TechnologyShenyang 110142LiaoningChina

The quality of hot-rolled steel strip is directly affected by the strip *** machine learning models have shown limitations in accurately predicting the strip crown,particularly when dealing with imbalanced *** limitation results in poor production quality and efficiency,leading to increased production ***,a novel strip crown prediction model that uses the Boruta and extremely randomized trees(Boruta-ERT)algorithms to address this issue was *** improve the accuracy of our model,we utilized the synthetic minority over-sampling technique to balance the imbalance data *** Boruta-ERT prediction model was then used to select features and predict the strip *** the 2160 mm hot rolling production lines of a steel plant serving as the research object,the experimental results showed that 97.01% of prediction data have an absolute error of less than 8 *** level of accuracy met the control requirements for strip crown and demonstrated significant benefits for the improvement in production quality of steel strip.

关键词： Hot-rolled strip Data improvement Strip crown Feature selection Boruta algorithm Extremely randomized trees algorithm

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Field report:Research along the Yarlung Suture Zone in Southern Tibet,a persistent geological frontier

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Geoscience Frontiers 2018年第2期9卷 591-594页

作者： Andrew K.Laskowski lin Ding Fu-Long Cai Yao-Fei Chen song-lin he Department of Earth Sciences Montana State UniversityBozemanMTUSA Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau Researchand Center for Excellence in Tibetan Plateau Earth SciencesChinese Academy of SciencesBeijing 100101China

The Yarlung Suture Zone in Southern Tibet marks the boundary between India and Asia-formerly separated by an ocean basin-and is a critical record of the tectonic processes that created the Tibetan Plateau. The Yarlung Suture Zone is also a frontier research area, as difficulty of access has limited research activity, providing ample opportunities for new discoveries. This paper documents field research conducted by the authors along the Yarlung suture zone in eastern Xigaze(Shigatse, Rikaze)County, ~250 km west of the city of Lhasa, in July 2017. The goal of this research was to map the Suture Zone structure in detail, and more specifically to understand the branching relationships between two major fault systems-the Great Counter Thrust and Gangdese Thrust. A summary of early geological exploration is included to provide context for this research.

关键词： Tibetan Plateau Himalaya Field work Structural geology Suture zone HP metamorphism UHP metamorphism History of geology

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基于马氏距离与组距估计的复杂系统健康评估

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仪器仪表学报 2016年第9期37卷 2022-2028页

作者：林彬宋东和麟西北工业大学航空学院西安710072

为充分了解复杂系统在工作过程中的健康状态,保证系统安全的运行,依据健康监测参数对系统进行实时健康评估是非常必要的。针对系统健康状态的综合评估问题,提出一种基于距离度量来构建系统健康指数的复杂系统健康评估方法。通过监测多... 详细信息

为充分了解复杂系统在工作过程中的健康状态,保证系统安全的运行,依据健康监测参数对系统进行实时健康评估是非常必要的。针对系统健康状态的综合评估问题,提出一种基于距离度量来构建系统健康指数的复杂系统健康评估方法。通过监测多个性能参数的时间序列,利用距离度量来降维,转化为单一的数据来评判系统的健康状态;然后,为了更好地去除时间序列中的扰动,对数据的分布进行研究,以马氏距离与直方图法相结合的办法构建出系统健康指数;最后通过NASA提供的PHM08数据,对所给出的航空发动机的主要监测数据进行健康评估,其结果表明该方法能对复杂系统进行有效的综合健康评估。

关键词：马氏距离直方图法健康指数健康评估

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Prognostic value of preoperative weight loss-adjusted body mass index on survival after esophagectomy for esophageal squamous cell carcinoma

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World Journal of Gastroenterology 2020年第8期26卷 839-849页

作者： Han-Lu Zhang Yu-Shang Yang Jia-Nan Duan Qi-Xin Shang song-lin he Yi-Min Gu Wei-Peng Hu Wen-Ping Wang Yang Hu Yun Wang Yong Yuan Long-Qi Chen Department of Thoracic Surgery West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Ophthalmology West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Thoracic and Cardiovascular Surgery the Second People's Hospital of ChengduChengdu 610017Sichuan ProvinceChina

BACKGROUND The impact of body mass index(BMI)on survival in patients with esophageal squamous cell carcinoma(ESCC)undergoing surgery remains ***,a definition of clinically significant BMI in patients with ESCC is *** To explore the impact of preoperative weight loss(PWL)-adjusted BMI on overall survival(OS)in patients undergoing surgery for *** This retrospective study consisted of 1545 patients who underwent curative resection for ESCC at West China Hospital of Sichuan University between August 2005 and December *** relationship between PWL-adjusted BMI and OS was examined,and a multivariate analysis was performed and adjusted for age,sex,TNM stage and adjuvant *** Trends of poor survival were observed for patients with increasing PWL and decreasing *** with BMI≥20.0 kg/m2 and PWLhe longest median OS(45.3 mo).Patients with BMIhe three groups were associated with significantly different OS(Pherapy were identified as independent prognostic *** PWL-adjusted BMI has an independent prognostic impact on OS in patients with ESCC undergoing *** might be an indicator for patients with PWLher than≥8.8%.

关键词： Esophageal neoplasms Body mass index Body weight change Survival Surgery Nutrition status

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Constraints on holographic QCD phase transitions from PTA observations

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 71-78页

作者： song he Li Li Sai Wang Shao-Jiang Wang Center for Theoretical Physics and College of Physics Jilin University School of Physical Science and Technology Ningbo University Max Planck Institute for Gravitational Physics (Albert Einstein Institute) CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences (UCAS) School of Physical Sciences University of Chinese Academy of Sciences (UCAS) Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences

The underlying physics of QCD phase transition in the early Universe remains largely unknown due to its strong-coupling nature during the quark-gluon plasma/hadron gas transition, yet a holographic model has been proposed to quantitatively fit the lattice QCD data while with its duration of the first-order phase transition(FoPT) left undetermined. At specific baryon chemical potential, the first-order QCD phase transition agrees with the observational constraint of baryon asymmetry. It, therefore, provides a scenario for phase transition gravitational waves(GWs) within the standard model of particle physics. If these background GWs could contribute dominantly to the recently claimed common-spectrum red noise from pulsar timing array(PTA) observations, the duration of this FoPT can be well constrained, and the associated primordial black holes are still allowed by current observations.

关键词： pulsar timing array QCD phase transition gravitational waves primordial black holes

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Passive activity enhances residual control ability in patients with complete spinal cord injury

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Neural Regeneration Research 2025年第8期20卷 2337-2347页

作者： Yanqing Xiao Mingming Gao Zejia he Jia Zheng Hongming Bai Jia-Sheng Rao Guiyun song Wei song Xiaoguang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Rehabilitation Evaluation China Rehabilitation Research CenterBeijingChina Cardiac Center Beijing Children’s HospitalCapital Medical UniversityBeijingChina The State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijingChina Department of Rehabilitation Engineering China Rehabilitation Science InstituteBeijingChina

Patients with complete spinal cord injury retain the potential for volitional muscle activity in muscles located below the spinal injury ***,because of prolonged inactivity,initial attempts to activate these muscles may not effectively engage any of the remaining neurons in the descending pathway.A previous study unexpectedly found that a brief clinical round of passive activity significantly increased volitional muscle activation,as measured by surface *** this study,we further explored the effect of passive activity on surface electromyographic signals during volitional control tasks among individuals with complete spinal cord *** patients with chronic complete thoracic spinal cord injury were *** electromyography data from eight major leg muscles were acquired and compared before and after the passive activity *** results indicated that the passive activity led to an increased number of activated volitional muscles and an increased frequency of *** the cumulative root mean square of surface electromyography amplitude for volitional control of movement showed a slight increase after passive activity,the difference was not statistically *** findings suggest that brief passive activity may enhance the ability to initiate volitional muscle activity during surface electromyography tasks and underscore the potential of passive activity for improving residual motor control among patients with motor complete spinal cord injury.

关键词： complete spinal cord injury cycle training epidural electrical stimulation motor training passive activity physiological state spinal cord circuit surface electromyography volitional control task

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A Study of Siliceous Pneumoconiosis in a Desert Area of Sunan County,Gansu Province,China

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Biomedical and Environmental Sciences 1993年第3期6卷 217-222页

作者： XU XIU-ZheN’, CAT XI-GUANG, MEN XIAN-SEN, YANG PENG-YUN, YANG JING-FU, JING song-lin he JI-HUA, AND SI WEI-YIPeople’s Hospital of Gansu Province Sunan County Hospital of Gansu Province, Lanzhou730000, China People's Hospital of Gansu Province Lanzhou China.

Three hundred and ninety five residents in a desert area were examined with chest radiographs and 28 cases with siliceous pneumoconiosis were found. The prevalence of siliceous pneumoconiosis was 7.09%, and that over 40 years of age was 21%. The histological findings of lungs from a camel living in that area for 20 years also confirmed to have siliceous pneumoconiosis.

关键词： A Study of Siliceous Pneumoconiosis in a Desert Area of Sunan County Gansu Province China

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Can patients with mild non-neoplastic lesions diagnosed at baseline screening be safely exempt from surveillance: evidence from multicenter community-based cohorts

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Science China Life Sciences 2025年第1期 263-271页

作者： Siyi he Zhiyi Zhang Guohui song Zhenhai Wang Chunyun Dai Shipeng Yan Kun Jiang Bingbing song he Li Maomao Cao Dianqin Sun Fan Yang Xinxin Yan Shaoli Zhang Yi Teng Qianru Li Changfa Xia Wanqing Chen Office of Cancer Screening National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College Department of Gastroenterology Gansu Wuwei Tumor Hospital Cixian Cancer Institute linzhou Cancer Hospital Center for Disease Control and Prevention of Sheyang County Department of Cancer Prevention and Control Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of MedicineCentral South University Luoshan Center for Disease Control and Prevention Office for Cancer Control and Research Affiliated Cancer Hospital of Harbin Medical University

Surveillance recommendations for gastric cancer（GC） in current guidelines focused on advanced precancerous lesions and were based on precise diagnosis of severity/extent of baseline lesions. We aimed to develop a less endoscopy-related equipment-dependent risk-stratification tool, and assessed whether mild-precursor-lesion patients can be safely exempt from surveillance. In the multicenter communitybased cohort, 75,051 participants receiving baseline endoscopy were enrolled during 2015–2017 and followed-up until 2021. Cumulative incidence rates（CIRs） of GC for precancerous-conditions were calculated by Kaplan-Meier method and compared by Log-rank tests. Mixedeffects Cox regression models were used to detect potential factors for progression towards GC. A risk score was calculated as counts of selected factors. An independent cohort, including 26,586 participants was used for external validation. During a median follow-up of 6.25 years, CIRs of GC were 0.302%, 0.436%, and 4.756% for normal group, non-neoplastic（atrophic gastritis/intestinal metaplasia） and neoplastic lesions（low-grade/high-grade dysplasia）, respectively(Ptrendher GC risks（adjusted HR=7.73, 95%CI: 4.29–13.92）, and their four-year CIR reached the one-year CIR of neoplastic lesions. Further categorizing non-neoplastic lesions by histological grade, both patients with moderate-to-severe lesions（aHR=3.07, 95%CI: 1.67–5.64） and high-risk patients with mild lesions（aHR=7.29, 95%CI: 3.58–14.86） showed higher risks. Consistent trends were observed in validation cohort. High-risk mild-precursor-lesion patients should receive surveillance within 3–5 years after baseline screening. Our study provides evidence on supplementing current guideline recommendations.

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日光温室韭菜网纹瓜轮作栽培技术

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现代化农业 2008年第12期 23-24页

作者：宋合林刘萍辽宁省台安县高力房镇辽宁台安114108

辽宁省台安县高力房镇乔坨子村是远近闻名的网纹瓜生产基地,多年来采用韭菜、网纹瓜一年两茬轮作模式,上茬韭菜公顷产量48t ,下茬网纹瓜每公顷产量45t,获得了较好的经济效益.

关键词：栽培技术轮作模式网纹韭菜日光温室瓜生产基地一年两茬

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