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Recent advances in theoretical models of respiratory mechanics

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Acta Mechanica Sinica 2012年第1期28卷 1-7页

作者： Bo Huo rui-Rong fu Key Laboratory of Microgravity&Center for Biomechanicsand Bioengineering Institute of Mechanics Chinese Academy of Sciences100190 BeijingChina

As an important branch of biomedical engineering, respiratory mechanics helps to understand the physiology of the respiratory system and provides fundamental data for developing such clinical technologies as ventilators. To solve different clinical problems, researchers have developed numerous models at various scales that describe biological and mechanical properties of the respiratory system. During the past decade, benefiting from the continuous accumulation of clinical data and the dramatic progress of biomedical technologies （e.g. biomedical imaging）, the theoretical modeling of respiratory mechanics has made remarkable progress regarding the macroscopic properties of the respiratory process, complexities of the respiratory system, gas exchange within the lungs, and the coupling interaction between lung and heart. The present paper reviews the advances in the above fields and proposes potential future projects.

关键词： Respiratory mechanics Biomechanics Gas exchange

Fractal analysis on the spatial distribution of acoustic emission in the failure process of rock specimens

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International Journal of Minerals,Metallurgy and Materials 2009年第1期16卷 19-24页

作者： rui-fu Yuan Yuan-hui Li Energy Science and Engineering School Henan Polytechnic University Jiaozuo 454000 China College of Resource and Civil Engineering Northeastern University Shenyang 110004 China

The spatial distribution of acoustic emission （AE） events in the failure process of several rock specimens was acquired using an advanced AE acquiring and analyzing system. The box counting method （BCM） was employed to calculate the fractal dimension （FD） of AE spatial distribution. There is a similar correlation between the fractal dimension and the load strength for different rock specimens. The fractal dimension presents a decreasing trend with the increase of load strength. For the same kind of specimens, their FD values will decrease to the level below a relatively same value when they reach failure. This value can be regarded as the critical value, which implies that the specimen will reach failure soon. The results reflect that it is possible to correlate the damage of rock with a macroscopic parameter, the FD value of AE signals. furthermore, the FD value can be also used to forecast the final failure of rock. This conclusion allows identifying or predicting the damage in rock with a great advantage over the classic theory and is very crucial for forecasting rockburst or other dynamic disasters in mines.

关键词： rockburst acoustic emission spatial distribution fractal dimension critical value damage

Hot workability characteristics of Rene88DT superalloy with directionally solidified microstructure

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Rare Metals 2015年第1期34卷 51-63页

作者： fu-Lin Li rui fu Di Feng Zhi-Ling Tian Superalloy Department Central Iron & Steel Research Institute

The hot deformation characteristics of Rene88DT superalloy with directionally solidified micro- structure produced by electroslag remelting continuous directionally solidification （ESR-CDS） were studied in the temperature range of 1,040-1,140 ℃ and strain rate range of 0.001-1.000 s-1 by hot compression tests. Flow curves for Rene88DT alloy with initial directionally solidified （DS） microstructure exhibit pronounced peak stresses at the early stage of deformation followed by the occurrence of dynamic softening phenomenon. Rene88DT alloy with DS micro- structure shows higher flow peak stresses compared with HIPed P/M superalloy FGH4096, but the disparities in peak stresses between ESR-CDSed Rene88DT and HIPed P/M superalloy FGH4096 reduce as temperature increases. The improvement of hot workability of DS alloy with columnar grains avoiding the maximum shear stress comes true. A hot deformation constitutive equation as a function of strain that describes the dependence of flow stress on strain rate and temperature is established. Hot deformation apparent acti- vation energy （Q） varies not only with the strain rate and temperature but also with strain. The strain rate sensitivity exponent （m） map is established at the strain of 0.8, which reveals that global dynamic recrystallization （DRX） shows a relatively high m value in a large strain compression. Optimum parameters are predicted in two regions： T = 1,100-1,130 ℃, ε = 0.100-1.000 s-1 and T = 1,080- 1,100 ℃, ε = 0.010-100 s-1, which is based on pro- cessing maps and deformation microstructure observations.

关键词： Rene88DT alloy Directional solidification Isothermal compression Constitutive equation Processingmap

Case report of a patient with suspected COVID-19 with depression and fever in an epidemic stress environment

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General Psychiatry 2020年第3期33卷 191-193页

作者： rui fu Yueqin Zhang Department of Mental lness and Insomnia Jingmen Stomatological Hospital(Jingmen Mental Health Center)JingmenHubei ProvinceChina Department of Anorectal Surgery Second People's Hospital of JingmenJingmenChina

During the COVID-19 pandemic,the number of suspected cases,confirmed cases and those who passed away from the virus has been reported in major media and the internet,and has caused a high degree of *** addition,people's outdoor activities have been limited,making it more difficult to find outlets for releasing *** this situation,some people began to experience emotions of anxiety and *** article reports a case of depression with fever caused by the stress tension of the *** patient was highly suspected to have contracted *** reported patient,who had a history of depression and had been to Wuhan to attend an exam,showed obvious pre-exam anxiety under the epidemic situation,which gradually increased the patient's pressure and then caused some adverse symptoms,such as insomnia,anxiety,sweating and a reoccurrent *** community authorities paid close attention to him and later sent him to a general hospital in Jingmen for quarantine and treatment,as he was suspected of having *** being hospitalised for half a month,he was ruled out from having‘COVID-19'and was cured of depression and discharged from the *** this case,we can realise that,under the situation of the epidemic,people are easily prone to insomnia,anxiety and even *** clinicians in general hospitals,especially when encountering large emergencies,we must carefully inquire about the patient's medical history while strengthening our understanding of psychiatric knowledge to improve the recognition rate for depression.

关键词： patient stress suspected

Mechanism of hydro-viscous soft start of belt conveyor

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Journal of China University of Mining and Technology 2008年第3期18卷 459-465页

作者： MENG Qing-rui HOU You-fu School of Mechanical and Electrical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

The mechanism of a hydro-viscous soft start is of great importance in the design of a hydro-viscous clutch and its control system. To explain the mechanism of a hydro-viscous soft start, the startup process of a belt conveyor was numerically analyzed with the modified Reynolds equation, an energy equation and a temperature-viscosity equation. The effect of temperature and grooves of the friction disk surface on torque transfer and load capacity of the oil film have also been analyzed. The results show that 1) the grooves are the basis of forming dynamic pressure but they may reduce the capacity of torque transfer to a certain extent, 2) during the startup process, temperature has little effect on torque transfer and load capacity and the variation in load capacity of the oil film is very small, indicating that it is preferable to use the flow rate as a control object than the pressure of the feed cylinder. The results have been verified by an experiment.

关键词： hydro-viscous clutch soft start belt conveyor torque transfer load capacity

Possible Involvement of Anti-Oxidant Enzymes in the Cross-Tolerance of the Germination/Growth of Wheat Seeds to Salinity and Heat Stress

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Journal of Integrative Plant Biology 2005年第10期47卷 1211-1219页

作者： Yan-Bao LEI Song-Quan SONG Jia-rui fu Xishuangbanna Tropical Botanical Garden the Chinese Academy of Sciences Yunnan 666303 China School of Life Sciences Sun Yat-Sen University Guangzhou 510275 China

The germination/growth of wheat （Triticum aestivum L. cv. Zimai 1） seeds and changes in the activities of superoxide dismutase （SOD）, ascorbate peroxidase （APX）, and catalase （CAT）, as well as in the content of thiobarbituric acid-reactive substances （TBARS）, in response to salt and heat stress, as well as cross-stress, were investigated in the present study. With increasing temperature and decreasing water potential caused by NaCI solution, the germination percentage of seeds and the fresh weight of seedlings decreased markedly, SOD activity increased, activities of APX and CAT decreased distinctly, and the TBARS content increased gradually. Seeds pretreated at 33℃ for different times displayed increased tolerance to subsequent salt stress, enhanced SOD, APX, and CAT activities, and decreased TBARS content. Seeds pretreated at -0.8 MPa NaCI for different times displayed increased tolerance to subsequent heat stress and marked increases in SOD, APX, and CAT activities, which were associated with decreased TBARS content. It is considered that the common component in the cross-tolerance of the germination and growth of wheat seeds to salinity and heat stress is the anti-oxidant enzyme system.

关键词： anti-oxidant enzymes cross tolerance germination growth heat stress salinity stress Triticum aestivum seeds.

Understanding Mechanistic Differences between 3-Diazoindolin-2-lmines and N-Sulfonyl-1,2,3-Triazoles in the Rh_(2)(ll)-Catalyzed Reactions with Nitrosoarenes

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Chinese Journal of Chemistry 2021年第6期39卷 1565-1572页

作者： rui fu Luyao Kou Ke Gao Shaofang Zhou Xiaoguang Bao College of Chemistry Chemical Engineering and Materials ScienceSoochow University199 Ren-Ai RoadSuzhou Industrial ParkSuzhouJiangsu 215123China

The employment of α-iminometallocarbenes to construct valuable N-containing compounds has attracted significant research ***,the nucleophilic addition of nitrosoarenes with the α-imino rhodium carbene species(I),which is derived from Rh_(2)(ll)-catalyzed denitrogenation of 3-diazoindolin-2-imines,to produce synthetically useful 2-iminoindolin-nitrones is ***,the N-attack of nitrosoarenes with the carbene site of I is *** the analogous Rh_(2)(ll)-catalyzed reaction of nitrosoarenes with N-sulfonyl-1,2,3-triazoles reported by Li and co-workers(***.2014,16,6394),however,the O-attack of nitrosoarenes with the carbene site of α-imino rhodium carbene species(II)is more favorable to occur than the *** subsequent transformation to yield the product of N-acylamidines is rationalized based on computational *** mechanistic differ-ences for the reactions of nitrosoarenes with a-imino rhodium carbene species I and II are discussed.

关键词： a-lmino rhodium carbene Nitrosoarene Reaction mechanism Chemo-selectivity Density functional theory

Case of catatonia misdiagnosed with coma

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General Psychiatry 2020年第1期33卷 56-58页

作者： rui fu Yanfang Chen Shaohua Cao Department of Sleep Disorders Hubei Jingmen Oral Hospital(Jingmen Mental Health Center)Hubei ProvinceChina Department of Psychiatry Shandong Mental Health CenterShandongChina Department of Hemodialysis Hubei Jingmen No.1 HospitalHubei ProvinceChina

Catatonia is a state of high-degree psychomotor inhibition in which patients often maintain a constant fixed posture,and generally have unconscious obstacles and various reflex *** suffering from severe catatonia will become *** generally manifests unconsciousness while various reflexes are *** show reticence,no food or drink intake,and immobility as signs of complete suppression of speech and movement,and even *** are often first diagnosed in non-psychiatric departments and are more likely to be misdiagnosed as having‘coma’or‘epilepsy,,thus delaying *** article reports a case of a 19-year-old female patient who was misdiagnosed with'catatonia'.A month ago,she was admitted to a general hospital of our city because of"intermittent attacks of nausea,vomiting,stupor for 15 years,with one week of exacerbation".During her hospitalisation,she suddenly appeared was mute,had no food or drink intake,and showed immobility and incontinence,presenting a'coma state'.She was transferred to a general hospital in Wuhan to further investigate the cause of her"coma".After 7 days in the hospital,no abnormal examination results were found and the symptoms were not ***,she was transferred to the mental health centre for hospitalisation in this *** patient was diagnosed as having(1)‘epileptic psychosis’and(2)‘catatonic stupor*.After 3 days of treatment,the patient's recovered *** was clinically cured and discharged half a month *** hereby report this case.

关键词： admitted transferred suddenly

An architecture of knowledge management system based on agent and ontology

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 126-130页

作者： fu rui-xue YUE Xin SONG Ming XIN Zhan-hong School of Economics and Management Beijing University of Posts and Telecommunications Beijing 100876 China

To solve the problems in knowledge management system （KMS）, such as information sharing, the ability to extend and re-engineer, and the reusable ability of legacy systems in distributed and heterogeneous environments. This article presents a method based on agent and ontology of designing KMS. This method consists of two agencies. One is knowledge agency with three agents supporting knowledge management process. The other is application agency with three agents supporting knowledge application. In this method, ontology is used to represent the knowledge in knowledge base and the content in the message exchanged among agents. To demonstrate the advantages of this method, experiments have been carried out and the results imply that this method is efficient and effective for small and medium-size enterprises to design KMS.

关键词： KMS multi-agent system (MAS) ontology