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| 1 | Transition of human diets and agricultural economy in Shenmingpu Site, Henan, from the Warring States to Han Dynasties显示文摘Historical records and archaeological remains indicate that the Chinese agricultural economy changed significantly from the Warring States (475-221 BC) to Han Dynasties (206 BC-220 AD), i.e., from rice-millet based agriculture to rice-millet-wheat based agriculture. However, the variation of human diets and the inner relationship between human diets and the agricultural transition during this period remain poorly understood. In this paper, the C and N stable isotopes from human and animal bones at the Shenmingpu site (SMPS), Xichuan County, Henan Province were analyzed. If some outliers (M34, M36, M102) were excluded, the mean 13C value (( 16.7±0.8)‰, n=15) of humans in Han Dynasties was dramatically lower than that in the Warring States (( 12.7±0.8)‰, n=14), indicating that the cultivation of rice and wheat, especially wheat, had been more widely popularized in Han Dynasties. Meanwhile, the range of 15N values of humans (6.6‰-9.3‰) in Han Dynasties was narrower than that of the Warring States (6.2‰-10.4‰), suggesting that the animal protein resources in human foods during Han Dynasties were more concentrated. The transition of human diets and the close relationship with the change of agricultural economy in SMPS were due to more stable society, the carryout of new agricultural policies, and the emergence of new agricultural tools in Han Dynasties. | HOU LiangLiang WANG Ning Lu Peng HU YaoWu SONG GuoDing WANG ChangSui | 2012 | Science China Earth Sciences2012，55，6： | 10 |
| 2 | Dynamic analysis of C/C composite finger seal显示文摘A seal device as an important component of aeroengines has decisive influence on performance, reliability, and working life of aeroengines. With the development of aeroengines,demands on the performance characteristics of seal devices are made strictly. Finger seal as a novel kind of sealing device, recently attracts more and more attentions in academic circles and engineering fields at home and abroad. Research on finger seals has been extensively developed, especially on leakage and wear performances under dynamic conditions. However, it is a pity that the work on finger seals has been limited with a single approach that is improving the performance by structural optimization; in addition, the technology of dynamic analysis on finger seals is weak. Aiming at the problems mentioned above, a distributed mass equivalent dynamic model of finger seals considering the coupling effect of overlaid laminates is established in the present paper, the dynamic performance of 2.5 dimension C/C composite finger seal is analyzed with the model, and then the effects of fiber bundle density and fiber bundle preparation direction on finger seal's dynamic performance are discussed, as well as compared with those of Co-based alloy finger seal. The current work is about dynamic analysis of finger seals and application of C/C composite in this paper may have much academic significance and many engineering values for improving research level of finger seal dynamics and exploring feasibility of C/C composite being used for finger seals. | Chen Guoding Wang Li’na Yu Qiangpeng Su Hua | 2014 | Chinese Journal of Aeronautics2014，27，3： | 8 |
| 3 | Impact of lubricant traction coefficient on cage's dynamic characteristics in high-speed angular contact ball bearing显示文摘In this paper,the formulas of elasto-hydrodynamic traction coefficients of three Chinese aviation lubricating oils,4109,4106 and 4050,were obtained by a great number of elastohydrodynamic traction tests.The nonlinear dynamics differential equations of high-speed angular contact ball bearing were built on the basis of dynamic theory of rolling bearings and solved by Gear Stiff(GSTIFF) integer algorithm with variable step.The impact of lubricant traction coefficient on cage's dynamic characteristics in high-speed angular contact ball bearing was investigated,and Poincare map was used to analyze the impact of three types of aviation lubricating oils on the dynamic response of cage's mass center.And then,the period of dynamic response of cage's mass center and the slip ratio of cage were used to assess the stability of cage under various working conditions.The results of this paper provide the theoretical basis for the selection and application of aviation lubricating oil. | Zhang Wenhu Deng Sier Chen Guoding Cui Yongcun | 2017 | Chinese Journal of Aeronautics2017，30，2： | 8 |
| 4 | Thermoelastohydrodynamic analysis of misaligned bearings with texture on journal surface under high-speed and heavy-load conditions显示文摘Hydrodynamic journal bearings are used to support the planetary gears in the transmission system of a Geared Turbo Fan engine, and they operate under severe working conditions, such as misalignment, high speed, and heavy load. Surface texture is regarded as an effective approach to improve mechanical properties under severe working conditions. However, the effects of surface texture on misaligned journal bearings under severe conditions have not been well studied. Therefore, a thermoelastohydrodynamic(TEHD) lubricating model with a textured and misaligned journal is presented in this study. Solid deformation, heat transfer between oil and the bearing, and heat convection between air and the bearing are considered in the model. The effects of cavitation and viscosity-temperature are also taken into account. The impacts of surface texture parameters and the misalignment angle on lubricating properties are investigated in the model. Results indicate that the bearing lubricating performance is greatly improved by optimal surface texture considering journal misalignment. The maximum oil film pressure and load-carrying capacity of a journal bearing increase with journal misalignment. Meanwhile, the oil film temperature increases sharply while considering misalignment. | Yu ZHANG Guoding CHEN Lin WANG | 2019 | Chinese Journal of Aeronautics2019，32，5： | 7 |
| 5 | Research into Configuration and Flow of Wall Oil Film in Bearing Chamber Based on Droplet Size Distribution显示文摘The lubrication design and heat transfer determination of bearing chambers in aeroengine require a sufficient understanding of the oil droplet-film interaction and physical characteristic in an oil/air two-phase flow state.The analyses of oil droplet movement,mass and momentum transfer during the impingement of droplet/wall,as well as wall oil film thickness and flow velocity are very important for the bearing chamber lubrication and heat transfer calculation.An integrated model in combination with droplet movement,droplet/wall impact and film flow analysis is put forward initially based on the consideration of droplet size distribution.The model makes a contribution to provide more practical and feasible technical approach,which is not only for the study of droplet-film interaction and physical behavior in bearing chambers with oil/air two-phase flow phenomena,but also useful for an insight into the essence of physical course through droplet movement and deposition,film formation and flow.The influences of chamber geometries and operating conditions on droplet deposition mass and momentum transfer,and wall film thickness and velocity distribution are discussed.The feasibility of the method by theoretical analysis is also verified by the existing experimental data.The current work is conducive to expose the physical behavior of wall oil film configuration and flow in bearing chamber,and also significant for bearing chamber lubrication and heat transfer study under oil/air two-phase flow conditions. | CHEN Guoding SUN Hengchao WANG Jun | 2011 | Chinese Journal of Aeronautics2011，24，3： | 7 |
| 6 | Dynamic performance of a C/C composite finger seal in a tilting mode显示文摘The complex operating state of aeroengines has an impact on the performance of finger seals. However, little work has been focused on the issue and the dynamic performance of finger seals is also rarely studied. Therefore, a distributed mass equivalent model considering working conditions is proposed in this paper for solving the existing problems. The effects of the fiber bundle density and the preparation direction of the fiber bundle of a C/C composite on the dynamic performance of a finger seal are investigated in rotor tilt based on the proposed model. The difference between the C/C composite finger seal performances under the rotor precession and nutation tilt cases is also investigated. The results show that the fiber bundle density and the preparation direction of the fiber bundle have an influence on the dynamic performance of the finger seal as rotor tilt is considered, and the dynamic performance of the finger seal is different in the two kinds of tilting modes. In addition, a novel method for design of finger seals is presented based on the contact pressure between finger boots and the rotor. Finger seals with good leakage rates and low wear can be acquired in this method. | Hailin ZHAO Guoding CHEN Li'na WANG Hua SU Fei LU | 2017 | Chinese Journal of Aeronautics2017，30，4： | 6 |
| 7 | In-situ Formed AIN Particulates and TiN Whiskers Mixture Reinforced Al Composite显示文摘 | Chunxiang CUI Renjie WU and Guoding ZHANG (Institute of Composite Materials, Shanghai Jiao Tong University, Shanghai 200030, China) | 1996 | Journal of Materials Science & Technology1996，12，5： | 6 |
| 8 | Dynamic Behavior Analysis of Finger Seal Based on Equivalent Dynamic Model显示文摘Finger seal is a new technology developed for gas path sealing in gas turbine engine.It has been paid attention to its good sealing performance and lower manufacture cost.The vibration behavior of finger seal is not be considered in performance analysis for the contact finger seal with compliant geometric configuration,then this will influence the reliability of the performance analysis and the parametric design of a finger seal.According to the dynamic character of finger seal,the harmonic vibration and free vibration models of a repetitive section of a two-layer finger seal that contains one high and one low finger seal are established separately.The dynamic behavior of finger seal in different working conditions is obtained based on the dynamic response analysis of finger's vibrations.The dynamic low hysteresis and low wear terms based on the equivalent dynamic model of finger seal are put forward,which can be used to predict the dynamic behavior of finger seal.As an example,the dynamic behaviors of an 8-layer finger seal and a 10-layer finger seal were predicted,and the validity of the prediction was demonstrated by the leakage test results of these two finger seals.The work presented here not only could make the dynamic analysis of finger seal with complicated structure simple and easy especially for multi-layer finger seal system,but also suggest a useful method for designing the finger seal with good dynamic behavior by means of different seal layers assembly. | SU Hua CHEN Guoding | 2010 | Chinese Journal of Mechanical Engineering2010，23，5： | 4 |
| 9 | A Method for Retrieving Water-leaving Radiance from Landsat TM Image in Taihu Lake, East China显示文摘The visible and infrared bands of Landsat Thematic Mapper (TM) can be used for inland water studies. A method of retrieving water-leaving radiance from TM image over Taihu Lake in Jiangsu Province of China was investigated in this article. To estimate water-leaving radiance, atmospheric correction was performed in three visible bands of 485nm, 560nm and 660nm. Rayleigh scattering was computed precisely, and the aerosol contribution was estimated by adopting the clear-water-pixels approach. The clear waters were identified by using the Landsat TM middle-infrared band (2.1μm), and the water-leaving radiance of clear water pixels in the green band was estimated by using field data. Aerosol scattering at green band was derived for six points, and interpolated to match the TM image. Assuming the atmospheric correction coefficient was 1.0, the aerosol scattering image at blue and red bands were derived. Based on a simplified atmospheric radiation transfer model, the water-leaving radiance for three visible bands was retrieved. The water-leaving radiance was normalized to make it comparable with that estimated from other remotely sensed data acquired at different times, and under different atmospheric conditions. Additionally, remotely sensed reflectance of water was computed. To evaluate the atmospheric correction method presented in this article, the correlation was analyzed between the corrected remotely sensed data and the measured water parameters based on the retrieval model. The results show that the atmospheric correction method based on the image itself is more effective for the retrieval of water parameters from Landsat TM data than 6S (Second Simulation of the Satellite Signal in the Solar Spectrum) code based on standard atmospheric and aerosol models. | WANG Deyu FENG Xuezhi MA Ronghua KANG Guoding | 2007 | Chinese Geographical Science2007，17，4： | 3 |
| 10 | A Pilot Study of Trophic Level and Human Origins at the Xiaoshuangqiao Site, China(ca. 1400 BC) Using 8D Values of Collagen显示文摘We present here a pilot study to examine trophic level effects and migration patterns at the middle Shang Dynasty site of Xiaoshuangqiao in Henan Province using δD results combined with δ^(13)C and δ^(15)N values. A total of 33 specimens(17 humans, 7 cattle, 5 pigs, 3 sheep, 1 dog) of bone collagen were isotopically analyzed for δ^(13)C, δ^(15)N, and dD values. A strong positive correlation(R^2 = 0.94)between mean δ^(15)N and δD values of herbivores(cattle and sheep), omnivores(pig), carnivores(dog)and humans was observed. The δD results were found to increase by ~10‰ to 20‰ from herbivores to omnivores to carnivorous, evidence that collagen δD results are a useful indicator for the study of trophic levels and dietary patterns at archaeological sites. The δD results were also used to examine the origins of two different groups of individuals buried at Xiaoshuangqiao. Individuals buried in sacrificial pits of district V had mean δD values(-47.0 ± 2.9‰, n = 11) that were significantly(p =0.049) elevated compared to the people buried in the stratigraphy of district IX(-51.3 ± 3.3‰, n = 3),indicating that they were ingesting water from different locations. In addition, the D values of the people buried in the stratigraphy were similar to the pigs(-54.5 ± 4.2‰, n = 5) at Xiaoshuangqiao,suggesting that they were most probably of the local population, and that the individuals buried in the sacrificial pits were most possibly from the coast and prisoners of the Dongyi('东夷')people. Thus,δD results have the potential to examine human origins and migration patterns and should be increasingly used in conjunction with δ^(13)C and δ^(15)N values at archaeological sites. | WANG Ning LI Suting HU Yaowu SONG Guoding | 2017 | Acta Geologica Sinica(English Edition)2017，91，5： | 2 |
| 11 | PHOTOELECTROCHEMICAL STUDY OF PASSIVE LAYERS ON COPPER ELECTRODES IN SOME ALKALINE MEDIA显示文摘PHOTOELECTROCHEMICALSTUDYOFPASSIVELAYERSONCOPPERELECTRODESINSOMEALKALINEMEDIA①A.Kamkina,1,ZhouGuodinga,XuQunjiebandB.H.cLooaE... | A. Kamkina,1, Zhou Guodinga, Xu Qunjieb and B. H.c Loo a Electrochemical Research Group, Shanghai Institute of Electric Power, Shanghai 200090, P. R. China b Corrosion Prevention Center, East China University of | 1998 | 中国有色金属学会会刊:英文版1998，8，2： | 2 |
| 12 | TENSILE STRENGTH ANALYSIS ON δ-Al_2O_3 SHORT FIBER REINFORCED Al-12Si ALLOY COMPOSITES显示文摘1INTRODUCTIONTheruleofmixture(ROM)usedinmetalmatrixcomposites(MMC),especialyshortfiberreinforcedMMCs(SFRMMCs)isstilunperfect... | Qin, Shuyi Liu, Shikai Zhang, Guoding | 1998 | 中国有色金属学会会刊:英文版1998，8，3： | 2 |
| 13 | Preprocessing and postprocessing for materials based on the homogenization method with adaptive finite element methods 显示文摘 | Guodes Kikuchl | 1990 | Computer Methods in Applied Mechanics and Engineering1990，83，： | 1 |
| 14 | The effect of interfacial modifying on the mechanical and wear properties of SiCP/Cu composites显示文摘 | Zhan Yongzhong Zhan Guoding | 2003 | Material Letters2003，57，： | 1 |
| 15 | Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis显示文摘TOPMODEL,a semi-distributed hydrological model,has been widely used.In the process of simulation of the model,Digital Elevation Model(DEM) is used to provide the input data,such as topographic index and distance to the drainage outlet;thus DEM plays an important role in TOPMODEL.This study aims at examining the impacts of DEM uncertainty on the simulation results of TOPMODEL.In this paper,the effects were evaluated mainly from quantitative and qualitative aspects.Firstly,DEM uncertainty was simulated by using the Monte Carlo method,and for every DEM realization,the topographic index and distance to the drainage outlet were extracted.Secondly,the obtained topographic index and the distance to the drainage outlet were input to the TOPMODEL to simulate seven rain-storm-flood events,and four evaluation indices,such as Nash and Sutcliffe efficiency criterion(EFF),sum of squared residuals over all time steps(SSE),sum of squared log residuals over all time steps(SLE) and sum of absolute errors over all time steps(SAE) were recorded.Thirdly,these four evaluation indices were analyzed in statistical manner(minimum,maximum,range,standard deviation and mean value),and effect of DEM uncertainty on TOPMODEL was quantitatively analyzed.Finally,the simulated hydrographs from TOPMODEL using the original DEM and realizations of DEM were qualitatively evaluated under each flood cases.Results show that the effect of DEM uncertainty on TOPMODEL is inconsiderable and could be ignored in the model’s application.This can be explained by:1) TOPMODEL is not sensitive to the distribution of topographic index and distance to the drainage outlet;2) the distri-bution of topographic index and distance to the drainage outlet are slightly affected by DEM uncertainty. | WANG Peifa DU Jinkang FENG Xuezhi KANG Guoding | 2006 | Chinese Geographical Science2006，16，4： | 1 |
| 16 | Effect of surface metallization of graphite on the tribological properties of copper hybrid composites显示文摘 | Zhan Yongzhong Zhang Guoding Wu Yuying | 2004 | Scand J Metall2004，33，2： | 1 |
| 17 | Primary cerebellopontine angle angiosarcoma显示文摘 | Guode Z Qi P Hua G | 2008 | J Clin Neurosci2008，15，8： | 1 |
| 18 | Goos-Hanchen shifts of the reflected waves from a cold, inhomogeneous,and magnetized plasma slab显示文摘 | Xu Guoding Zang Taocheng Pan Tao | 2010 | Physical Review E2010，81，01： | 1 |
| 19 | ApreliminarystudyontherelationshipbetweenthebacteriumisolateB619andpinewiltdisease(inChinese)[J]显示文摘 | ZhaoBG GuoDS GaoR etal | | 南京林业大学学报0，，： | 1 |
| 20 | Designand implementation of a high precision and wide rangeadjustable LED drive controller显示文摘 | DAI Guoding YU Feng WANG Xuan | 2010 | J Semicond2010，31，2： | 1 |
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