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Analysis on running safety of train on the bridge considering sudden change of wind load caused by wind

Tian ZHANG, He XIA, Weiwei GUO

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 558-567 doi: 10.1007/s11709-017-0455-1

Abstract: The calculation formulae for change of wind load acting on the car-body are derived when a train movesanalysis model of wind-vehicle-bridge system with wind barrier is established, and the influence of suddenchange of wind load on the running safety of the train is analyzed.It is shown that the sudden change of wind load caused by wind barrier has significant influence on the

Keywords： wind barrier     sudden change of wind load     dynamic response     running safety     comfort    

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multi-functional dynamic state estimator for error validation: measurement and parameter errors and suddenload changes Article

Mehdi AHMADI JIRDEHI,Reza HEMMATI,Vahid ABBASI,Hedayat SABOORI

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 11,   Pages 1218-1227 doi: 10.1631/FITEE.1500301

Abstract: The proposed algorithm also successfully detects and identifies sudden load changes in power systems.

Keywords： Dynamic state estimation     Kalman filter     Measurement errors     Branch parameter errors     Sudden load changes    

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Numerical simulation of sudden-expansion two-phase flows with two-scale second-order moment particle

ZENG Zhuoxiong, HAN Shoulei, ZHOU Lixing

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 202-206 doi: 10.1007/s11708-007-0026-6

Abstract: The model is employed to simulate gas-particle flows in a sudden-expansion chamber.

Keywords： gas-particle     single-scale second-order     large-scale fluctuation     second-order     sudden-expansion    

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Lagrangian simulation of deposition of CO gas-solid sudden expansion flow

HUANG Dongping, DING Guoliang, QUACK Hans

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 216-221 doi: 10.1007/s11708-008-0032-3

Abstract: Freezing and blockage resulting from the deposition of solid CO formed because of sudden expansion ofTo overcome this problem, the characteristics of the CO gas-solid sudden expansion flow are studied by

Keywords： comparison     gas-solid     downstream     blockage     Lagrangian    

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Local resistance of fluid flow across sudden contraction in small channels

Hang GUO, Ling WANG, Jian YU, Fang YE, Chongfang MA, Zhuo LI,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 149-154 doi: 10.1007/s11708-009-0060-7

Abstract: The pressure drop caused by flow area contraction in microchannels has been experimentally studied in this paper using the tiny gap pressure measurement method. The working fluid was deionized water at room temperature at near-atmospheric pressure. Three test sections with area ratios of 0.284 and 0.274 and at different tube diameter sizes were used. The experimental results show that the abrupt contraction coefficient decreases with the Reynolds number increasing, and it is much higher than that of conventional tubes in laminar flow. The widely-applied correlation =0.5(1−) could not predict the contraction coefficient of turbulent flow in the micro tubes. The decreases as the tube diameter increases. The transition from laminar to turbulent flow is not obvious when the diameter of the small tube is 0.32mm.

Keywords： microchannels     pressure drop     abrupt contraction     loss coefficients    

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Progressive collapse of 2D reinforced concrete structures under sudden column removal

El Houcine MOURID, Said MAMOURI, Adnan IBRAHIMBEGOVIC

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1387-1402 doi: 10.1007/s11709-020-0645-0

Abstract: strategy to model and simulate the progressive collapse of multi-story reinforced concrete structure under suddencontribution pertains to a very thorough investigation of progressive collapse of the structure under sudden

Keywords： failure mechanism     MBS dynamic analysis     gravity loads     structure-ground contact     structure-structure contact     energy conserving/decaying scheme    

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Cellular changes in bronchoalveolar lavage fluid in hyperoxia-induced lung injury

HE Xinbiao, ZHAO Wei

Frontiers of Medicine 2008, Volume 2, Issue 4,   Pages 370-373 doi: 10.1007/s11684-008-0071-5

Abstract: It is well known that high concentration oxygen exposure is a model of acute lung injury (ALI). However, controversy exists over the mechanism. This study was designed to clarify the cellular characteristics in bronchoalveolar lavage fluid (BALF) and body weight loss of rats exposed to oxygen(> 90%). Young male Wistar rats, aged 6 weeks, were divided into three groups: (1) room air group (exposed to room air, = 22); (2) hyperoxia < 48 h group (exposed to over 90% oxygen for less than 48 h, = 18); (3) hyperoxia 66–72 h group (exposed to over 90% oxygen for 66–72 h group, = 7). Compared to the room air group, the total cell counts in the hyperoxia 66–72 h group decreased, whereas the neutrophils increased significantly. The body weights of the rats exposed to room air continued to increase. However, the body weights of oxygen-exposed rats increased slightly on the first day and weight loss was seen from the second day. All rats were noted to have bilateral pleural effusion in the hyperoxia 66–72 h group. The data suggests that (1) an increase in neutrophil count is an evident feature of hyperoxia-induced lung injury; (2) high concentration oxygen exposure can give rise to anorexia and malnutrition, which may play a role in hyperoxia-induced lung injury. Blocking neutrophil influx into lung tissue in the early phase and improving malnutrition are two effective methods to reduce hyperoxic lung injury.
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Elucidate long-term changes of ozone in Shanghai based on an integrated machine learning method

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1738-5

Abstract: List>

● A novel integrated machine learning method to analyze O3 changes

Keywords： Ozone     Integrated method     Machine learning    

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From gut changes to type 2 diabetes remission after gastric bypass surgeries

Bing Li, Xinrong Zhou, Jiarui Wu, Huarong Zhou

Frontiers of Medicine 2013, Volume 7, Issue 2,   Pages 191-200 doi: 10.1007/s11684-013-0258-2

Abstract: potential mechanisms underlying the above relationship: gut anatomical rearrangement, microbial composition changesHowever, the exact changes and their relative importance in the metabolic improvements after gastric

Keywords： gastric bypass     T2DM     gut    

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Study on microbial protein and the mechanism of solid-state fermentation with periodical dynamic changes

FU Xiaoguo, CHEN Hongzhang, LI Hongqiang, MA Runyu

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 113-117 doi: 10.1007/s11705-007-0021-9

Abstract: microbial protein obtained from solid-state fermentation (SSF) and the effect of periodical dynamic changesThe mechanism of solid-state fermentation with periodical dynamic changes of air is also discussed.Compared with static solid-state fermentation, periodical dynamic changes of air afford a higher proteinactivity of the microbial extracellular protein in solid-state fermentation with periodical dynamic changesof air on the fifth day is nearly equal to that on the sixth day without periodical dynamic changes
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Estimation of composite load model with aggregate induction motor dynamic load for an isolated hybrid

Nitin Kumar SAXENA,Ashwani Kumar SHARMA

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 472-485 doi: 10.1007/s11708-015-0373-7

Abstract: The composite load is a combination of the static and dynamic load model.To develop this composite load model, the exponential load is used as a static load model and inductionmotors (IMs) are used as a dynamic load model.This aggregate model is used as a dynamic load model.exponential model of static load and for the fifth and third order IM dynamic load model using state

Keywords： isolated hybrid power system (IHPS)     composite load model     static load     dynamic load     induction motor loadmodel     aggregate load    

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Innate immune responses in RNA viral infection

Qian Xu, Yuting Tang, Gang Huang

Frontiers of Medicine 2021, Volume 15, Issue 3,   Pages 333-346 doi: 10.1007/s11684-020-0776-7

Abstract: RNA viruses cause a multitude of human diseases, including several pandemic events in the past century. Upon viral invasion, the innate immune system responds rapidly and plays a key role in activating the adaptive immune system. In the innate immune system, the interactions between pathogen-associated molecular patterns and host pattern recognition receptors activate multiple signaling pathways in immune cells and induce the production of pro-inflammatory cytokines and interferons to elicit antiviral responses. Macrophages, dendritic cells, and natural killer cells are the principal innate immune components that exert antiviral activities. In this review, the current understanding of innate immunity contributing to the restriction of RNA viral infections was briefly summarized. Besides the main role of immune cells in combating viral infection, the intercellular transfer of pathogen and host-derived materials and their epigenetic and metabolic interactions associated with innate immunity was discussed. This knowledge provides an enhanced understanding of the innate immune response to RNA viral infections in general and aids in the preparation for the existing and next emerging viral infections.

Keywords： innate immune     viral infection     intercellular signaling     metabolic changes     epigenetic changes    

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The temporal changes of the concentration level of typical toxic organics in the river sediments around

Qiang Li, Xiong Xu, Yaoyao Fang, Ruiyang Xiao, Donghong Wang, Wenjue Zhong

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 6, doi: 10.1007/s11783-018-1054-7

Abstract:

The current situation of typical organics in the sediments around Beijing was unclear.

56 kinds of typical toxic organics were detected in this article.

Historical data was compared with the data in this study.

The change of different organics in the sediments around Beijing was concluded.

Keywords： Organic compounds     Endocrine disrupters     Sediments     Concentration     Temporal changes    

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Sudden death due to arrhythmogenic right ventricular cardiomyopathy: Two case reports

CHEN Xinshan, ZHANG Yigu, RAO Guangxun, HUANG Guangzhao

Frontiers of Medicine 2007, Volume 1, Issue 3,   Pages 338-342 doi: 10.1007/s11684-007-0065-8

Abstract: The ARVC, usually presenting with different clinical manifestations and pathological changes, were mainlyseen in young men and is one of the main causes of sudden death in the young.One of the victims had extensive and severe pathological changes in his heart involving the left ventricularIt is believed that there are no marked differences in the pathological changes of ARVC between Chinese

Keywords： sarcoplasmic coagulation     acquired     ventricular myocardium     sino-atrial     autopsied    

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Calculation method of load distribution on pipe threaded connections under tension load

Shoujun CHEN, Lianxin GAO, Qi AN

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 241-248 doi: 10.1007/s11465-011-0219-x

Abstract:

This paper presents a new calculation method that can calculate the load distribution on pipe threadedconnections under tension load.the new method on the sample of P-110S pipe threaded connection, the obtained results show that the loadThe model offers a new way to calculate the loads carried on the thread teeth under tension load.

Keywords： load distribution     calculation method     pipe threaded connections     tension load    

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Title Author Date Type Operation

Analysis on running safety of train on the bridge considering sudden change of wind load caused by wind

Tian ZHANG, He XIA, Weiwei GUO

Journal Article

multi-functional dynamic state estimator for error validation: measurement and parameter errors and suddenload changes

Mehdi AHMADI JIRDEHI,Reza HEMMATI,Vahid ABBASI,Hedayat SABOORI

Journal Article

Numerical simulation of sudden-expansion two-phase flows with two-scale second-order moment particle

ZENG Zhuoxiong, HAN Shoulei, ZHOU Lixing

Journal Article

Lagrangian simulation of deposition of CO gas-solid sudden expansion flow

HUANG Dongping, DING Guoliang, QUACK Hans

Journal Article

Local resistance of fluid flow across sudden contraction in small channels

Hang GUO, Ling WANG, Jian YU, Fang YE, Chongfang MA, Zhuo LI,

Journal Article

Progressive collapse of 2D reinforced concrete structures under sudden column removal

El Houcine MOURID, Said MAMOURI, Adnan IBRAHIMBEGOVIC

Journal Article

Cellular changes in bronchoalveolar lavage fluid in hyperoxia-induced lung injury

HE Xinbiao, ZHAO Wei

Journal Article

Elucidate long-term changes of ozone in Shanghai based on an integrated machine learning method

Journal Article

From gut changes to type 2 diabetes remission after gastric bypass surgeries

Bing Li, Xinrong Zhou, Jiarui Wu, Huarong Zhou

Journal Article

Study on microbial protein and the mechanism of solid-state fermentation with periodical dynamic changes

FU Xiaoguo, CHEN Hongzhang, LI Hongqiang, MA Runyu

Journal Article

Estimation of composite load model with aggregate induction motor dynamic load for an isolated hybrid

Nitin Kumar SAXENA,Ashwani Kumar SHARMA

Journal Article

Innate immune responses in RNA viral infection

Qian Xu, Yuting Tang, Gang Huang

Journal Article

The temporal changes of the concentration level of typical toxic organics in the river sediments around

Qiang Li, Xiong Xu, Yaoyao Fang, Ruiyang Xiao, Donghong Wang, Wenjue Zhong

Journal Article

Sudden death due to arrhythmogenic right ventricular cardiomyopathy: Two case reports

CHEN Xinshan, ZHANG Yigu, RAO Guangxun, HUANG Guangzhao

Journal Article

Calculation method of load distribution on pipe threaded connections under tension load

Shoujun CHEN, Lianxin GAO, Qi AN

Journal Article