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Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

Chinese Journal of Mechanical Engineering 2022年第3期35卷 236-249页

作者： Cheng liu Meng guo Qingdong yan Wei Wei School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Chongqing Innovation Center Beijing Institute of TechnologyChongqing 401122China Advanced Technology Research Institute Beijing Institute of TechnologyJinan 250307China

Cavitation inside a torque converter induces noise,vibration and even failure,and these effects have been disregarded in previous torque converter design ***,modern torque converter applications require attention to this issue because of its high-speed and high-capacity ***,this study investigated the cavitation effect on a torque converter using both numerical and experimental methods with an emphasis on the influence of the charging oil feed location and charge *** fluid dynamics(CFD)models were established to simulate the transient cavitation behaviour in the torque converter using different charging oil pressures and inlet arrangements and testing against a base case to validate the *** CFD results suggested that cavitating bubbles mainly takes place in the stator of the torque *** transient cavitation CFD model yielded good agreement with the experimental data,with an error of 7.6%in the capacity constant and 7.4%in the torque *** the experimental and numerical studies showed that cavitation induced severe capacity degradation,and that the charge pressure and charging oil configuration significantly affects both the overall hydrodynamic performance and the fluid behaviour inside the torque converter because of *** the charge pressure and charging the oil from the turbine-stator clearance were found to suppress cavitation development and reduce performance degradation,especially in terms of the capacity *** study revealed the fluid field mechanism behind the influence of charging oil conditions on torque converter cavitation behaviour,providing practical guidelines for suppressing cavitation in torque converter.

关键词： Torque converter Cavitation CFD Transient flow

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“驺虞”考辨

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西北大学学报（哲学社会科学版） 2004年第6期34卷 148-152页

作者：严国荣刘昌安陕西师范大学文学院陕西西安710061 陕西理工学院中文系陕西汉中723000

《诗经·召南·驺虞》篇的"驺虞",历来争讼不一。通过对《诗经》研究的历史考察,参证文献资料,并对《山海经》的资料加以辨析,认为"驺虞"是兽名,后世视其神异,解作西方之神兽"白虎",对其崇拜,同时赋予了神话传说的内容,具有原始的文化... 详细信息

《诗经·召南·驺虞》篇的"驺虞",历来争讼不一。通过对《诗经》研究的历史考察,参证文献资料,并对《山海经》的资料加以辨析,认为"驺虞"是兽名,后世视其神异,解作西方之神兽"白虎",对其崇拜,同时赋予了神话传说的内容,具有原始的文化意义。

关键词：《诗经》驺虞《山海经》神话

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Applying a new method for direct collection, volume quantification and determination of N_2 emission from water

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Journal of Environmental Sciences 2015年第1期27卷 217-224页

作者： Xinhong liu yan Gao Honglian Wang Junyao guo Shaohua yan Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences College of Resources and Environmental Science Nanjing Agricultural University

The emission of N2 is important to remove excess N from lakes, ponds, and wetlands. To investigate the gas emission from water, Gao et al.（2013） developed a new method using a bubble trap device to collect gas samples from waters. However, the determination accuracy of sampling volume and gas component concentration was still debatable. In this study, the method was optimized for in situ sampling, accurate volume measurement and direct injection to a gas chromatograph for the analysis of N2 and other gases. By the optimized new method, the recovery rate for N2 was 100.28% on average; the mean coefficient of determination（R2） was 0.9997; the limit of detection was 0.02%. We further assessed the effects of the new method, bottle full of water, vs. vacuum bag and vacuum vial methods, on variations of N2 concentration as influenced by sample storage times of 1,2, 3, 5, and 7 days at constant temperature of 15°C, using indices of averaged relative peak area（%） in comparison with the averaged relative peak area of each method at 0 *** indices of the bottle full of water method were the lowest（99.5%–108.5%） compared to the indices of vacuum bag and vacuum vial methods（119%–217%）. Meanwhile, the gas chromatograph determination of other gas components（O2, CH4, and N2O） was also accurate. The new method was an alternative way to investigate N2 released from various kinds of aquatic ecosystems.

关键词： New method N2 Ebullition collection Direct injection Gas chromatograph

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Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-yan Huang Yi-De Zhang Jie Chen Hai-Di Fan Wan Wang Bin Wang Ju-Yun Ma Peng-Peng Li Hai-Wei Pu Xin-Yian guo Jian-Gang Shen Su-Hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

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Combined BRAF G469A mutation and echinoderm microtubule associated protein like-4-anaplastic lymphoma kinase rearrangement with resistance:A case report and review of literature

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World Journal of Clinical Oncology 2025年第2期16卷 165-172页

作者： Xuan guo yan liu Yu-Ting Wang Kan liu Hui Ding Department of Pulmonary and Critical Care Medicine Yixing People’s Hospital of Jiangsu UniversityYixing 214200Jiangsu ProvinceChina

BACKGROUND Through deeper understanding of targetable driver mutations in non-small-cell lung cancer(NSCLC)over the past years,some patients with driver mutations have benefited from the targeted molecular *** the anaplastic lymphoma kinase and BRAF mutations are not frequent subtypes in NSCLC,the availability of several targeted-drugs has been confirmed through a series of clinical *** little is clear about the proper strategy in rare BRAF G469A mutation,not to mention co-exhibition of anaplastic lymphoma kinase and BRAF G469A mutations,which is extremely rare in *** SUMMARY We present a patient to stage IVA lung adenocarcinoma with coexisting echinoderm microtubule associated protein like-4 rearrangement and BRAF G469A *** received several targeted drugs with unintended resistance and suffered from unbearable adverse *** Due to the rarity of co-mutations,the case not only enriches the limited literature on NSCLC harbouring BRAF G469A and echinoderm microtubule associated protein like-4 mutations,but also suggests the efficacy and safety of specific multiple-drug therapy in such patients.

关键词： Non-small-cell lung cancer Driver mutation Rearrangement Resistance Case report

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Effects of alternating current interference on corrosion of X60 pipeline steel

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Petroleum Science 2015年第2期12卷 316-324页

作者： yan-Bao guo Cheng liu De-guo Wang Shu-Hai liu College of Mechanical and Transportation Engineering China University of Petroleum

With rapid economic development in China, demand for energy and transportation is growing. Due to the limitations of factors such as terrain and traffic, a large number of buried oil and gas pipelines are parallel to high- voltage transmission lines and electrified railways over long distances. Alternating pipelines is very serious in laboratory experiments were current （AC） corrosion of such cases. In this work, carried out with an electrochemical method in a simulated soil solution at various AC current densities from 0 to 200 A]m2 and AC frequencies from 10 to 200 Hz. Experimental results indicated that with an increase in the AC current density, the corrosion po- tential of an X60 steel electrode shifted negatively, the anodic current density increased significantly, and the corrosion rate increased. Moreover, with an increase in the AC frequency, the corrosion potential of the X60 electrode shifted positively and the anodic current density decreased, which led to a decrease in the corrosion rate. Furthermore, the morphology of X60 electrodes indicated that uniform corrosion occurred at a low AC current density; while corrosion pits were found on the X60 electrode surface at a high AC current density, and deep corrosion pits seriously damaged the pipelines and might lead to leakage.

关键词： Alternating current interference - X60pipeline steel Corrosion AC current density - ACfrequency

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Studies on the PEO-PPO-PEO Block Copolymer Release from Alginate Hydrogel

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Chemical Research in Chinese Universities 2001年第3期17卷 341-346页

作者： SU yan-lei guo Chen liu Hui-zhou Young Scientist Laboratory of Separation Science and Engineering State Key Laboratory of Biochemical EngineeringInstitute of Chemical MatellurgyChinese Academy of SciencesBeijing 100080P.R.China

Alginate hydrogel is one of the most widely used carriers for the immobilization of microbial cells. If surfactants are encapsulated with alginate hydrogel, increasing temperature or concentration can make the encapsu... 详细信息

关键词： Sodium alginate hydrogel PEO-PPO-PEO block copolymer Release mechanism

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One-pot remote desymmetrization/Peterson-olefination for the construction of silicon-stereogenic silyl ethers

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Science China Chemistry 2023年第10期66卷 2797-2802页

作者： Wengang guo Qian Li yan liu Can Li State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Chiral silyl ethers and silanols are important synthetic intermediates and bioactive *** this work,we developed a onepot remote desymmetrization/Peterson-olefination of silacyclopentene oxides with benzoic acids in the presence of Martin’s *** new methodology not only realizes the atom-economy of Peterson olefination,but also represents a catalytic method for synthesis of silicon-stereogenic silyl *** a bulky chiral phosphoric acid 4i as organocatalyst,the reactions proceeded efficiently to afford various olefin-functionalized organosilyl ethers in excellent diastereoelectivities(up to 25/1 d.r.)and high enantioselectivities(up to 94%ee).

关键词： asymmetric catalysis silicon-stereogenic silyl ether remote desymmetrization/Peterson-olefination bronsted acid catalysis

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Flow field simulation of the thin metal ribbon formed by twin-belt rapid solidification

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Journal of University of Science and Technology Beijing 2008年第2期15卷 155-160页

作者： yan liu Jianxin Xie Feng guo Cheng Zhou School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Liaoning Institute of Technology Jingzhou 121001 China

The flow field formed when an aluminum ribbon is produced by twin-belt rapid solidification is simulated with the solution algorithm （SOLA）-volume of fluid （VOF） method, and the influence of casting speed and cooling-belt velocity on the flow field is analyzed for a given ejection nozzle size. It has been found that the flow field can be filled well when the width of the ejection nozzle outlet is the same as that of the up slit of the cooling belt. When the ejection nozzle outlet is wider than the up slit of the cooling belt, the aluminum fluid can fill well if only the casting speed matches the cooling-belt velocity properly, otherwise under filling occurs in some areas in the cooling zone.

关键词： rapid solidification twin-belt method numerical simulation ribbon forming

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Phase Separation and Transport Behavior in La_(0.67-x)Sm_xSr_(0.33)MnO_3 System

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Chemical Research in Chinese Universities 2005年第6期21卷 707-713页

作者： liu Ning yan guo-qing XU Su-jun Department of Physics Suzhou College Suzhou 23400 P. R. China Structure Research Laboratory Science and Technology University of China Hefei 230026 P. R. China

The magnetic behavior and the transport behavior of La0.67-x Smx Sr0.33 MnO3 （x = 0. 00, 0. 10, 0. 20, 0. 30, 0. 40, 0. 50 and 0. 60 ） systems were studied through measuring the M-T curves, electron spin resonance （ ESR ） curves and ρ-T curves. The samples exhibit a long-range ferromagnetic order when x = 0. 00, 0. 10, a cluster-spin glass state when x = 0. 20 and 0. 30, and an anti-ferromagnetic state at low temperatures when x = 0. 40, 0. 50 and 0. 60. The samples of x = 0. 30 and 0.40 show phase separation at temperatures above Te. The transport behavior of the sample of x = 0. 60 becomes abnormal when the doping is high, and an insulator-metal transition occurs near To and then a metal-insulator transition occurs, which rarely appears in an ABO3 structure. It is concluded that the magnetic and electric behavior changes of the systems depend on the extra magnetism and lattice distortion effect induced by Sm doping.

关键词： Magnetic structure Phase separation Transport behavior Colossal magnetoresistance effect

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