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| 1 | Application of DVA theory in vibration reduction of carbody with suspended equipment for high-speed EMU显示文摘The theory of dynamic vibration absorber(DVA)was applied to restrain the vibration of carbody for high-speed electric multiple unit(EMU).The carbody was modeled as an Euler-Bernoulli beam with the equipment mounted on the chassis regarded as a DVA.Suspension parameters of the equipment were optimized based on the modal analysis of the beam and parameter optimization of the DVA.Vertical motion equations of the carbody and equipment were derived to study the effect of the suspension parameters on the vibration of carbody,which included the suspension frequency,damping ratio,mounting position and mass.Then a 3D rigid-flexible coupled vehicle system dynamics model was built to simulate the response of carbody and equipment to track excitation.The results show that the equipment mounted on the carbody chassis can be regarded as a DVA to reduce the flexible vibration of carbody,and the optimum suspension frequency can be calculated theoretically with the first-order vertical bending mode of carbody considered.Heavy equipment should be mounted to the carbody center as close as possible to obtain a significant vibration reduction,while light equipment has quite limited contribution to that.Also,a laboratory test was conducted on the full-scale test rig which shows a good agreement with the theoretical analysis and dynamic simulations.The faster the vehicle runs,the more significant are the advantages of the elastic suspension. | SHI HuaiLong LUO Ren WU PingBo ZENG Jing GUO JinYing | 2014 | Science China(Technological Sciences)2014，57，7： | 14 |
| 2 | Influence of equipment excitation on flexible carbody vibration of EMU显示文摘To study the vibration transmission characteristics of a flexible carbody and its suspended equipment, a vertical mathematical model of high-speed electric multiple unit was established with equipment excitation considered.And the dynamic unbalance and impact turbulence excitation from equipment were taken into account in a singlestage and two-stage vibration isolation system, respectively.Results show that the excitation transferred to carbody increases with suspension stiffness but decreases with the equipment mass increasing; the vibration transmission can be reduced by increasing the equipment mass or reduce the suspension stiffness. To avoid vibration resonance, the dynamic unbalance frequency of equipment should be out of the possible range of the carbody flexible modes, and a small stiffness should be applied to reduce the impact turbulence. A small stiffness, however, would result in a large movement of the equipment which is limited by the static deflection requirement, while a great stiffness will transfer high frequency vibration. Therefore, a preferred stiffness should make the suspension frequency of equipment a bit greater than the first bending mode of carbody. Additionally,a 3D rigid-flexible coupled dynamics model was built to verify the mathematical analysis, and they show good agreements. Results show that a two-stage isolation could reduce the excitation transmission and make the vibration of carbody and equipment acceptable. | Huailong Shi Ren Luo Pingbo Wu Jing Zeng Jinying Guo | 2014 | Journal of Modern Transportation2014，22，4： | 8 |
| 3 | Protective effects of acupuncture on brain tissue following ischemia/reperfusion injury显示文摘BACKGROUND: In patients with cerebrovascular disease, by means of the neuroendocrine system, acupuncture supports the transformation of a local pathological status into a physiological status. Recently, great progress has been made in studying the protective effects of acupuncture on brain ischemia/reperfusion injury. OBJECTIVE: To summarize research advances in the protective effects of acupuncture on brain ischemia/reperfusion injury. RETRIEVAL STRATEGY: Using the terms 'acupuncture, transcutaneous electrical acupoint stimulation, cerebral ischemia/reperfusion injury, and cerebral protection', we retrieved articles from the PubMed database published between January 1991 and June 1994. Meanwhile, we searched the China National Knowledge Infrastructure with the same terms. Altogether, 114 articles and their results were analyzed. Inclusive criteria: studies that were closely related to the protective effects of acupuncture on brain ischemia/reperfusion injury, or studies, whose contents were in the same study field and were published recently, or in the authorized journals. Exclusive criteria: repetitive studies. LITERATURE EVALUATION: Thirty articles that related to the protective effects of acupuncture on brain ischemia/reperfusion injury were included. Among them, 7 were clinical studies, and the remaining 23 articles were animal experimental studies. DATA SYNTHESIS: ① Animal experimental studies have demonstrated that acupuncture improves brain blood perfusion and brain electrical activity, influences pathomorphological and ultramicrostructural changes in ischemic brain tissue, is beneficial in maintaining the stability of intracellular and extracellular ions, resists free radical injury and lipid peroxidation, and influences cytokine, neurotransmitter, brain cell signal transduction, and apoptosis-regulating genes. ② Clinical studies have demonstrated that acupuncture not only promotes nutritional supply to local brain tissue in patients with cerebral infarction, but also increases brain blood flow and attenuates inflammatory reactions of injured brain tissue. ③ At present, the mechanisms underlying the protective effects of acupuncture on brain ischemia/reperfusion injury have been greatly studied. Some conclusions, however, are not sufficient or comprehensive, and remain as primarily isolated incidents. CONCLUSION: Studies that focused on mechanisms that influence the protective effects of acupuncture on brain ischemia/reperfusion injury have provided results; however, several mechanisms are still poorly understood. The goals for studying the mechanistic actions of acupuncture are to not only investigate the various protective effects of acupuncture on ischemic brain injury, but to also understand the internal associations between the various protective effects and their common mechanistic actions. | Mingshan Wang Fuguo Ma Huailong Chen | 2008 | Neural Regeneration Research2008，3，3： | 4 |
| 4 | Construction of oxygen vacancy on Bi_(12)O_(17)Cl_(2)nanosheets by heat-treatment in H_(2)O vapor for photocatalytic NO oxidation显示文摘Oxygen-vacancies(OVs)play significant roles in semiconductor-based photocatalysis,such as elevating light absorption property,photogenerated carries separation efficiency,molecular activation,and photocatalytic activity.However,heat-treatment of semiconductors in dangerous H_(2)atmosphere is usually indispensable for OVs formation.In this work,C-doped Bi_(12)O_(17)C_(12)nanosheets were facially heat-treated in H_(2)O vapor(~2.3 vol%)mixed with Ar at 300℃to in-situ introduce OVs by the proposed reactions of C(s)+H_(2)O(g)→CO(g)+H_(2)(g)and H_(2)(g)+O_(Lattice)→H_(2)O(g)+OV.The formation of OVs,which was confirmed by electron paramagnetic resonance(EPR),can narrow the band gap,and enhance the photogenerated e~-/h~+separation efficiency on Bi_(12)O_(17)C_(12).Moreover,OVs-rich Bi_(12)O_(17)C_(12)nanosheets can facilitate molecular O_(2)activation and produce more reactive oxygen species(ROS),especially~1 O_(2),which greatly improve the NO to NO_(3)~-conversion efficiency with NO removal rate of~63%and NO_(3)~-production selectivity of~92.6%.The present work will bring new insights into the construction and roles of OVs in semiconductor-based photocatalysis. | Yi Yang Yi Zeng Tongxin Jin Xiaohu Zhang Huailong Teng Shengyao Wang Hao Chen | 2022 | Journal of Materials Science & Technology2022，，28： | 1 |
| 5 | Improved lateral-dynamics-intended railway vehicle model involving nonlinear wheel/rail interaction and car body flexibility显示文摘To study the vehicle hunting behavior and its coupling with car body vibrations,a simplified lateral-dynamics-intended railway vehicle model is developed.A two-truck vehicle is modeled as a 17 degrees-of-freedom rigid system,into which the car body flexural vibrations of torsion and bending modes are further integrated.The wheel/rail interaction employs a real-time calculation for the Hertzian normal contact,in which the nonlinear curvatures of wheel and rail profiles are presented as functions of wheelset lateral movement and/or yaw rotation.Then the tangential/creep forces are analytically expressed as the Hertzian contact patch geometry,and lead to a continuous and fast calculation compared to a look-up table interpolation.It is shown that the hunting frequencies of the vehicle model and a truck model differ significantly,which verifies the necessity of the whole vehicle model.In the case of low wheel/rail conicity,the hunting frequency increases linearly with vehicle speed,whereas it rises slowly at high speed for a large conicity.Comparison of hunting frequency and damping ratio between various conicities shows that first hunting(car body hunting)may occur when the vehicle is operated at a low speed in a small conicity case,while a second hunting(truck hunting)appears when the vehicle is operated at a high speed in a large conicity case.Stability analysis of linear and nonlinear vehicle models was carried out through coast down method and constant speed simulations.Results tell that the linear one overestimates the lateral vibrating.Whereas the structural vibrations of car body can be ignored in the stability analysis.Compared to existing simplified models for hunting stability study,the proposed simplified vehicle model released limitations in the nonlinear geometries of wheel/rail profiles,and it is suitable for a frequency-domain analysis by deriving the analytical expressions of the normal and tangential wheel/rail contact forces. | Huailong Shi Ren Luo Jinying Guo | 2021 | Acta Mechanica Sinica2021，37，6： | 1 |
| 6 | Maternal urinary bisphenol A levels and infant low birth weight: A nested case–control study of the Health Baby Cohort in China显示文摘 | Wenqian Huo Wei Xia Yanjian Wan Bin Zhang Aifen Zhou Yiming Zhang Kai Huang Yingshuang Zhu Chuansha Wu Yang Peng Minmin Jiang Jie Hu Huailong Chang Bing Xu Yuanyuan Li Shunqing Xu | 2015 | Environment International2015，，： | 1 |
| 7 | Copper-catalyzed asymmetric 1,3-dipolar cycloaddition of azomethine ylides withβ-trifluoromethyl-substituted alkenyl heteroarenes显示文摘Copper-catalyzed asymmetric 1,3-dipolar cycloaddition of azomethine ylides andβ-trifluoromethyl-substituted alkenyl heteroarenes was developed for the first time.A wide range of enantioenriched pyrrolidines containing both heteroarenes and trifluoromethyl group with multiple stereogenic centers could be readily accessible by this method with good to high yields and excellent levels of both stereo-and regioselectivity(up to 99%yield,>20:1 rr,>20:1 dr,and up to 95%ee).Notably,substratecontrolled umpolung-type dipolar cycloaddition was also disclosed in this protocol to achieve regiodivergent synthesis withα-aryl substituted aldimine esters as the dipole precursors.Systematic DFT studies were conducted to explore the origin of the stereo-and regioselectivity of this 1,3-dipolar cycloaddition,and suggest that copper(Ⅱ)salt utilized in this catalytic system could be reduced in-situ to the active copper(Ⅰ)species and might be responsible for the observed high stereo-and regioselectivity. | Xiang Cheng Xin Chang Yuhong Yang Zongpeng Zhang Jing Li Yipu Li Wenxiao Zhao Lung Wa Chung Huailong Teng Xiu-Qin Dong Chun-Jiang Wang | 2023 | Science China Chemistry2023，66，11： | 0 |
| 8 | The Impact of the Pilot Free Trade Zone on Regional Financial Development显示文摘This paper focuses on the Shanghai pilot free trade zone(FTZ).It investigates the effect of the FTZ policy on regional financial development.The synthetic control method employs quarterly data from 2005 to 2019 at the provincial level to investigate counterfactual states before and after the pilot FTZ was set up.First,our results reveal that the Shanghai pilotFTZ had a positive influence on the following four variables proxied for regional financial development:(i)the scale of regional financial development;(i)the efficiency of indirect financial development;(ii)the efficiency of direct financial development;(iv)the structure of financial development.Second,our results found that the policy effects that began to emerge from 2014 onwards exhibited a steadily increasing trend.As a result,the four proxy variables have increased by(i)197 percent,(i)202 percent,(ii)9.4 percent,and(iv)15.2 percent,respectively.That is,the scale of regional financial development and the efficiency of indirect financial development have increased more than theother proxy variables. | Lihui Wang Zhihong Liu Huailong Shi | 2022 | China & World Economy2022，30，5： | 0 |
| 9 | Engineering critical assessment on welding flaws of the X65 UOE girth weld based on CRACKWISE显示文摘Focused on the girth weld of a Φ762 × 28. 6 mm( X65) offshore UOE pipe,the fracture toughness properties at different weld joint positions were tested. Meanwhile,the largest size of different cracks under service condition was calculated by using CRACKWISE. The service life of the UOE pipe with postulated crack-like flaws was calculated by considering various fatigue factors,such as vibrations caused by ocean current and fluctuations of inner pressure. The assessment process and results can be used to direct the repair of weld flaws laid in pipes or to assess the reliability of in-serving pipes. | WANG Huailong QIAN Weifang | 2017 | Baosteel Technical Research2017，11，3： | 0 |
| 10 | Late Miocene Environmental Crises and Their Impacts:Desiccation of the Mediterranean and Its bearing on World Desertification and Hominid Appearance显示文摘The ancient Mediterranean was once dried up around6~5.3million years ago.It is a landmark event,which had great impact on global environment and climate.However,few references are available in the literatures on this topic, | SONG Huailong | 2014 | Acta Geologica Sinica(English Edition)2014，88，S1： | 0 |
| 11 | Saline-Alkali(Mixed) Dust Storms and Their Main Generation Mechanism显示文摘The exposed surface of the dry salt lake basin contains a large number of extremely fine lightweight saline-alkali(mixed)dust and clay dust.It is extremely easy to dust and since saline-alkali lake is low-lying and its | SONG Huailong | 2014 | Acta Geologica Sinica(English Edition)2014，88，S1： | 0 |
| 12 | Salt Desert and Saline-Ackaline Mixed Dust Storms:An Ignored Issure for Global Climate Change显示文摘Salt desert,saline-alkaline dust storm and saline-alkaline mixed dust storm are significant but ignored problems for a long time.After many years of observations and researches,the author believes that salt desert,saline-alkaline | SONG Huailong | 2014 | Acta Geologica Sinica(English Edition)2014，88，S1： | 0 |
| 13 | Highly pathogenic coronavirus N protein aggravates inflammation by MASP-2-mediated lectin complement pathway overactivation显示文摘Excessive inflammatory responses contribute to the pathogenesis and lethality of highly pathogenic human coronaviruses,but the underlying mechanism remains unclear.In this study,the N proteins of highly pathogenic human coronaviruses,including severe acute respiratory syndrome coronavirus(SARS-CoV),middle east respiratory syndrome coronavirus(MERS-CoV)and severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),were found to bind MASP-2,a key serine protease in the lectin pathway of complement activation,resulting in excessive complement activation by potentiating MBL-dependent MASP-2 activation,and the deposition of MASP-2,C4b,activated C3 and C5b-9.Aggravated inflammatory lung injury was observed in mice infected with adenovirus expressing the N protein.Complement hyperactivation was also observed in SARS-CoV-2-infected patients.Either blocking the N protein:MASP-2 interaction,MASP-2 depletion or suppressing complement activation can significantly alleviate N protein-induced complement hyperactivation and lung injury in vitro and in vivo.Altogether,these data suggested that complement suppression may represent a novel therapeutic approach for pneumonia induced by these highly pathogenic coronaviruses. | Ting Gao Lin Zhu Hainan Liu Xiaopeng Zhang Tingting Wang Yangbo Fu Hongzhen Li Qincai Dong Yong Hu Zhang Zhang Jing Jin Zijing Liu Weihong Yang Yaoning Liu Yanwen Jin Kaitong Li Yongjiu Xiao Junli Liu Huailong Zhao Yue Liu Ping Li Jibo Song Lu Zhang Yuwei Gao Sisi Kang Shoudeng Chen Qingjun Ma Xiuwu Bian Wei Chen Xuan Liu Qing Mao Cheng Cao | 2022 | Signal Transduction and Targeted Therapy2022，7，10： | 0 |
| 14 | Application of a sintered flux in UOE pipe manufacturing显示文摘Submerged arc welding is one of the main processes used in the manufacture of UOE welded pipes.It determines directly the quality of the pipes.In the submerged arc welding process,flux plays a very important role;it not only affects the performance of the weld seam but also has a significant impact on the generation and prevention of weld defects.It is important to use a sintered flux for UOE pipe production.To meet the high-quality requirements on UOE welded pipes,the flux should be chosen such that it can resist high current and high speed,and help the weld achieve low H and O contents.At the same time,storage and management of a flux also require stringent monitoring.Domestic enterprises generally use sintered fluxes for the production of welded pipes. | QIAN Weifang CAO Neng LIU Shuo WANG Huailong | 2013 | Baosteel Technical Research2013，7，3： | 0 |
| 15 | Girth welding procedure and weldability evaluation of coal seam gas transmission UOE pipeline显示文摘According to the requirements of Queensland Gas Company Ltd.(QGC),the operator of the Queensland Curtis LNG(QCLNG)pipeline project in Australia,girth welding experiments and weldability evaluations have been carried out for three X70 UOE pipes from Baosteel based on API 1104 standards.Shielded metal arc welding(SMAW)and gas-shielded flux-cored wire arc welding(FCAW-G)have been applied,and the girth weld joint quality and mechanical performance were evaluated.It was found that the field girth weldability of Baosteel’s X70 UOE pipes was excellent under the conditions used here and satisfied the requirements of the QCLNG project for field girth welding construction.Furthermore,Baosteel has offered a solution to the QCLNG project for pipeline girth welding in which the girth welding joint design,selection of welding processes and consumables,welding procedures,techniques and joint inspections are included.Such research provides important guidance for the difficult tie-in welding applications for the construction of the QCLNG pipelines in the field. | LIU Shuo QIAN Weifang WANG Huailong CAO Neng | 2013 | Baosteel Technical Research2013，7，3： | 0 |
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