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| 1 | New eolian red clay sequence on the western Chinese Loess Plateau linked to onset of Asian desertification about 25 Ma ago显示文摘The expansion of inland Asia deserts has considerably influenced the environmental, social and economic activities in Asia. Aridification of inland Asia, especially timing of the initiation of Asian desertification, is a contentious topic in paleoclimatology. Late Cenozoic eolian loess-red clay sequences on the Chinese Loess Plateau, which possess abundant paleoclimatic and paleo-environmental information, can be regarded as an indicator of inland Asia desertification. Here we present a detailed magnetostratigraphic investigation of a new red clay sequence about 654 m in Zhuanglang located at the western Chinese Loess Plateau. Sedimentological, geochemical, mineralogical, and quartz morphological lines of evidence show that the red clay is of eolian origin. Magnetostratigraphic correlations indicate that this core sequence spans from 25.6 to 4.8 Ma, and typical eolian red clay appears as early as 25 Ma. This extends the lower limit of the red clay on the Chinese Loess Plateau from the previously thought early Miocene back into the late Oligocene. This new red clay record further implies that the inland Asia desertification was initiated at least by the late Oligocene. This sequence provides a unique high-resolution geological record for understanding the inland Asia desertification process since the late Oligocene. | QIANG XiaoKe AN ZhiSheng SONG YouGui CHANG Hong SUN YouBin LIU WeiGuo AO Hong DONG JiBao FU ChaoFeng WU Feng LU FengYan CAI YanJun ZHOU WeiJian CAO JunJi XU XinWen AI Li | 2011 | Science China Earth Sciences2011，54，1： | 73 |
| 2 | CFD Study of NO_x Emissions in a Model Commercial Aircraft Engine Combustor显示文摘Air worthiness requirements of the aircraft engine emission bring new challenges to the combustor research and design. With the motivation to design high performance and clean combustor, computational fluid dynamics (CFD) is utilized as the powerful design approach. In this paper, Reynolds averaged Navier-Stokes (RANS) equations of reactive two-phase flow in an experimental low emission combustor is performed. The numerical approach uses an implicit compressible gas solver together with a Lagrangian liquid-phase tracking method and the extended coherent flamelet model for turbulence-combustion interaction. The NOx formation is modeled by the concept of post-processing, which resolves the NOx transport equation with the assumption of frozen temperature distribution. Both turbulence-combustion interaction model and NOx formation model are firstly evaluated by the comparison of experimental data published in open literature of a lean direct injection (LDI) combustor. The test rig studied in this paper is called low emission stirred swirl (LESS) combustor, which is a two-stage model combustor, fueled with liquid kerosene (RP-3) and designed by Beihang University (BUAA). The main stage of LESS combustor employs the principle of lean prevaporized and premixed (LPP) concept to reduce pollutant, and the pilot stage depends on a diffusion flame for flame stabili-zation. Detailed numerical results including species distribution, turbulence performance and burning performance are qualita-tively and quantitatively evaluated. Numerical prediction of NOx emission shows a good agreement with test data at both idle condition and full power condition of LESS combustor. Preliminary results of the flame structure are shown in this paper. The flame stabilization mechanism and NOx reduction effort are also discussed with in-depth analysis. | ZHANG Man FU Zhenbo LIN Yuzhen LI Jibao | 2012 | Chinese Journal of Aeronautics2012，25，6： | 14 |
| 3 | Advanced treatment of municipal wastewater by nanofiltration: Operational optimization and membrane fouling analysis显示文摘Municipal sewage from an oxidation ditch was treated for reuse by nanofiltration(NF) in this study. The NF performance was optimized, and its fouling characteristics after different operational durations(i.e., 48 and 169 hr) were analyzed to investigate the applicability of nanofiltration for water reuse. The optimum performance was achieved when transmembrane pressure = 12 bar, p H = 4 and flow rate = 8 L/min using a GE membrane. The permeate water quality could satisfy the requirements of water reclamation for different uses and local standards for water reuse in Beijing. Flux decline in the fouling experiments could be divided into a rapid flux decline and a quasi-steady state. The boundary flux theory was used to predict the evolution of permeate flux. The expected operational duration based on the 169-hr experiment was 392.6 hr which is 175% longer than that of the 48-hr one. High molecular weight(MW) protein-like substances were suggested to be the dominant foulants after an extended period based on the MW distribution and the fluorescence characteristics. The analyses of infrared spectra and extracellular polymeric substances revealed that the roles of both humic- and polysaccharide-like substances were diminished, while that of protein-like substances were strengthened in the contribution of membrane fouling with time prolonged. Inorganic salts were found to have marginally influence on membrane fouling. Additionally, alkali washing was more efficient at removing organic foulants in the long term, and a combination of water flushing and alkali washing was appropriate for NF fouling control in municipal sewage treatment. | Kun Li Jianxing Wang Jibao Liu Yuansong Wei Meixue Chen | 2016 | Journal of Environmental Sciences2016，28，5： | 14 |
| 4 | A 23 GHz high-temperature superconducting microstrip filter for radio astronomy显示文摘This paper reports a 6-pole high-temperature superconducting (HTS) microstrip bandpass filter for radio astronomy applications. The filter has a center frequency of 23 GHz and a bandwidth the 2 GHz. We have made many efforts, such as adopting 0.25-mm-thick substrate, carefully designing the housing box and filter layout, to solve the problems in realizing a K-band planar filter. A special straight-line half-wavelength resonator (center-widen resonator) was also designed to reduce the insertion loss of the filter. The measured results showed a midband insertion loss of 0.11 dB with a ripple of 0.4 dB, and a return loss better than 11.5 dB. Good agreement was obtained between simulated and measured results. | GAO Lu GUO Jin WANG YueHui YU Tao ZHANG Qiang LI ChunGuang ZHANG XueQiang LI Hong LI JunJie LI WuXia GU ChangZhi MENG JiBao FENG Ji HE YuSheng | 2009 | Chinese Science Bulletin2009，54，19： | 6 |
| 5 | Spatial pattern of modern sedimentation rate of Qinghai Lake and a preliminary estimate of the sediment flux显示文摘We investigated the spatiotemporal distribution of1 37Cs radioactivity in surface sediment of Qinghai Lake,and developed the spatial pattern of sedimentation rate.The1 37Cs inventory is higher near the estuary/bank area,but lower at the central lake.On the other hand,the average1 37Cs activity is lower near the estuary/bank area,but higher at the central lake.The mass accumulation rate(MAR) and the fluxes and contents of the terrestrial detritus(e.g.SiO2,Fe2O3,and Ti) are higher near the estuary/bank area,but lower at the central lake.The chemical/biogenic deposits(e.g.the autogenic carbonates) take up higher fractions at the central lake.These suggest that the spatial pattern of recent sedimentation rate is dominated by the deposition of terrestrial detritus.The average MAR(0.0337 g cm-2a-1) was estimated based on those of different cores of Qinghai Lake and was verified by a Ca mass-balance method.The fluxes of total lake sediments,terrestrial detritus,and direct atmospheric deposits were also estimated. | XU Hai LIU XiaoYan AN ZhiSheng HOU ZhaoHua DONG JiBao LIU Bin | 2010 | Chinese Science Bulletin2010，55，7： | 6 |
| 6 | Effects of chlortetracycline,Cu and their combination on the performance and microbial community dynamics in swine manure anaerobic digestion显示文摘Swine manure was typical for the combined pollution of heavy metals and antibiotics. The effects of widely used veterinary antibiotic chlortetracycline(CTC), Cu and their combination on swine manure anaerobic digestion performance and microbial community have never been investigated. Thus, four 2 L anaerobic digestion reactors were established including reactor A(control), B(CTC spiked by 0.5 g/kg dry weight, dw), C(Cu spiked by 5 g/kg dw) and D(combination of CTC, 0.5 g/kg dw, and Cu, 5 g/kg dw), and dynamics of bacterial and archaeal community structure was investigated using high throughput sequencing method. Results showed that addition of CTC and Cu separately could increase the total biogas production by21.6% and 15.8%, respectively, while combination of CTC and Cu severely inhibited anaerobic digestion(by 30.3%). Furthermore, corresponding to different stages and reactors, four kinds of microbes including bacteria and archaea were described in detail, and the effects of CTC, Cu and their combination mainly occurred at hydrolysis and acidification phases. The addition of Cu alone changed the dynamics of archaeal community significantly. It was genus Methanomassiliicoccus that dominated at the active methane production for A, B and D, while it was genus Methanobrevibacter and Methanoculleus for C. | Rui Wang Junya Zhang Jibao Liu Dawei Yu Hui Zhong Yawei Wang Meixue Chen Juan Tong Yuansong Wei | 2018 | Journal of Environmental Sciences2018，30，5： | 5 |
| 7 | Origin and Accumulation of Natural Gases in the Upper Paleozoic Strata of the Ordos Basin in Central China显示文摘在 Ordos 盆的上面的古生代的阶层的天然气被气体的链烷的相对重的 C 同位素与δ
13 C 1和δ
13 C 2价值主要从 35 ‰ 到 30 ‰ 和 27 ‰ 到 22 ‰,分别地高δ
13在在有超过 0.95 的大多数 C 1/(C1-C5)比率的烃气体的乙烷和甲烷和占优势的甲烷之间的 C 旅行(回合 10 ),建议导出煤的气体的起源。气体展出为天然气的有那些的 C 1-C4 链烷的同位素的侧面发现了在的不同的碳更低这盆古生代,并且相信了从含碳二叠的煤措施被发源。地区性弥漫的煤气的累积的出现在中央盆的轻轻地向南方蘸的 Shanbei 斜坡是不同的。在各种各样的煤气的水库的气体的分子、同位素的作文变化与煤气的来源岩石的热成熟被联系,这被注意。丰富和 δ
13 甲烷的 C 价值通常向北并且从盆中心衰退到它的边缘,并且组合修正上的烃移植的效果似乎不足道。然而,在水库的垂直、侧面的节的单性生植方解石的 C 同位素显示出一个常规变化,并且总体上向上并且向盆边缘被弄空。有煤气的成熟坡度的联合,分析能被认为是为煤气的移植的一个有用工具。 | ZHU Yangming WANG Jibao LIU Xinse ZHANG Wenzheng | 2009 | Acta Geologica Sinica(English Edition)2009，83，1： | 5 |
| 8 | Precessing motion in stratified radial swirl flow显示文摘Vortex/flame interaction is an important mechanism for unsteady combustion in a swirl combustion system. Technology of low emission stirred swirl(Te LESS), which is characterized with stratified swirl flow, has been developed in Beihang University to reduce NOXemission. However,large-scale flow structure would be induced in strong swirl flow. Experiments and computational fluid dynamics(CFD) simulation were carried out to investigate the unsteady flow feature and its mechanism in Te LESS combustor. Hotwire was firstly applied to testing the unsteady flow feature and a distinct mode with 2244 Hz oscillation frequency occurred at the pilot swirl outlet.The flow mode amplitude decayed convectively. Large eddy simulation(LES) was then applied to predicting this flow mode and know about its mechanism. The deviation of mode prediction compared with hotwire test was 0.8%. The spiral isobaric structure in pilot flow passage indicates that precessing vortex core(PVC) existed. The velocity spectrum and phase lag analysis suggest that the periodic movement at the pilot outlet was dominated by precessing movement. Negative tangential momentum gradient reflects that the swirl flow was unstable. Another phenomenon was found out that the PVC movement was intermittently rotated along the symmetric axis. | Qin Hao Lin Yuzhen Li Jibao | 2016 | Chinese Journal of Aeronautics2016，29，2： | 4 |
| 9 | Influences of Ca and Y Addition on the Microstructure and Corrosion Resistance of Vacuum Die-Cast AZ91 Alloy显示文摘The influences of Ca and Y additions on the microstructure and corrosion resistance of vacuum die-cast AZ91 alloys were investigated by optical microscope,electron scanning microscope,weight-loss test,and electrochemical corrosion experiment.The results indicate that the Ca or Ca and Y additions refined the microstructure and decreased the amount of Mg17Al12 phase on grain boundaries in the alloys.Meanwhile,the addition of Ca and Y led to the formation of network Al2 Ca phase and rod-like Al2 Y phase,improved the corrosion resistance of AZ91 magnesium alloy.Compared with AZ91 alloy,the corrosion rate of AZ91–1.5Ca–1.0Y alloy was decreased to 16.2%,and its corrosion current density was dropped by one order of magnitude after immersion in 3.5 wt% NaCl solution for 24 h. | Feng Wang Jibao Li Jing Liu Dan Lv Pingli Mao Zheng Liu | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，4： | 4 |
| 10 | Modeling,Simulation and Experiment of Electro-hydraulic Screw Down Servo System of Seamless Tube Rolling Mill显示文摘Electro-hydraulic screw down servo system(HSDS) is widely used in seamless tube rolling mill in western companies.But in Chinese companies,mechanical screw down system(MSDS) is popularly equipped and has a serious disadvantage that the roller would often be locked when it is overloaded.For the purpose of designing the first set of domestic twin-roller,four-cylinder and six-framework electro-hydraulic HSDS of seamless tube rolling mill,an experiment system that can simulate the process of seamless tube rolling is constructed.A digital simulation model of the experiment system is built with AMESim software and validated by comparing the simulation results with experiment results.The sudden load response of the screw piston position is studied with the built model and the experiment system.To improve the HSDS's positioning accuracy with large load,a hybrid control scheme of combining load disturbance feedforward compensation(LDFC) method based on servo valve's pressure-stroke feature and anti-saturation integral control(ASIC) is proposed.Both results of simulation and experiment indicate that the transient response time of the single-roller HSDS with the proposed scheme decreases from 0.65 s to less than 0.2 s without static error.To improve the system dynamic stiffness and production qualified rate,a flow rate feedforward compensation(FFC) control strategy based on oil compressibility to dynamic position error is proposed.This FFC strategy is validated with experiments in which the transient error caused by sudden load is reduced to less than 25% of that without FFC.By extending the simulation model to HSDS of a twin-roller,four-cylinder rolling mill,analyzing the mill deformation,and applying the LDFC,ASIC and FFC to the HSDS,the dynamic performance and positioning accuracy of compensated multi-roller HSDS at biting moment are predicted.The research results provide a theoretical and experimental basis for the design of HSDS of seamless steel tube rolling mill. | XU Xiaoqing QUAN Long LI Bin GUO Jibao | 2011 | Chinese Journal of Mechanical Engineering2011，24，1： | 4 |
| 11 | Molecular cloning and characterization of a gene encoding the proline transporter protein in common bean(Phaseolus vulgaris L.)显示文摘As a typical compatible solute, proline is accumulated in plants under environmental stresses. Proline transporter(Pro T) plays an important role in proline distribution between plant organs. Using a candidate gene approach, we cloned a c DNA sequence for Pro T from common bean(Phaseolus vulgaris L.) and designated the gene Pv Pro T. The deduced amino acid sequence of Pv Pro T showed high similarity to Bet/Pro T proteins from other leguminous plants, and the highest similarity was observed with mothbean(Vigna aconitifolia L.) Vu Pro T.Relative quantification of the m RNA level of Pv Pro T using real-time PCR analysis showed that the Pv Pro T transcript level was higher in leaves than in stems and roots of common bean plants subjected to drought and salt stress. Under 20%(w/w) PEG-6000 treatment,drought-resistant plants expressed a higher level of Pv Pro T transcripts than droughtsensitive plants. Although heterologous expression of Pv Pro T in the Escherichia coli mutant mkh13 showed that Pv Pro T exhibited uptake activities for proline and betaine, no betaine content was detected in the common bean. These findings suggest that Pv Pro T plays an important role in the transportation of proline in common bean plants exposed to drought and salt stress. | Jibao Chen Jing Wu Yunfeng Lu Yuannan Cao Hui Zeng Zhaoyuan Zhang Lanfen Wang Shumin Wang | 2016 | The Crop Journal2016，4，5： | 2 |
| 12 | Molecular mechanisms of exercise contributing to tissue regeneration显示文摘Physical activity has been known as an essential element to promote human health for centuries.Thus,exercise intervention is encouraged to battle against sedentary lifestyle.Recent rapid advances in molecular biotechnology have demonstrated that both endurance and resistance exercise training,two traditional types of exercise,trigger a series of physiological responses,unraveling the mechanisms of exercise regulating on the human body.Therefore,exercise has been expected as a candidate approach of alleviating a wide range of diseases,such as metabolic diseases,neurodegenerative disorders,tumors,and cardiovascular diseases.In particular,the capacity of exercise to promote tissue regeneration has attracted the attention of many researchers in recent decades.Since most adult human organs have a weak regenerative capacity,it is currently a key challenge in regenerative medicine to improve the efficiency of tissue regeneration.As research progresses,exercise-induced tissue regeneration seems to provide a novel approach for fighting against injury or senescence,establishing strong theoretical basis for more and more“exercise mimetics.”These drugs are acting as the pharmaceutical alternatives of those individuals who cannot experience the benefits of exercise.Here,we comprehensively provide a description of the benefits of exercise on tissue regeneration in diverse organs,mainly focusing on musculoskeletal system,cardiovascular system,and nervous system.We also discuss the underlying molecular mechanisms associated with the regenerative effects of exercise and emerging therapeutic exercise mimetics for regeneration,as well as the associated opportunities and challenges.We aim to describe an integrated perspective on the current advances of distinct physiological mechanisms associated with exercise-induced tissue regeneration on various organs and facilitate the development of drugs that mimics the benefits of exercise. | Jibao Chen Ren Zhou Ye Feng Lin Cheng | 2022 | Signal Transduction and Targeted Therapy2022，7，12： | 2 |
| 13 | Optimization of microwave- assisted solvent extraction for volatile organic acids in tobacco and its comparison with conventional extraction methods 显示文摘 | Xiaolan Zhu Qingde Su Jibao Cal | 2006 | Analytica chimiea acta2006，579，： | 1 |
| 14 | Comparison of simul-taneous distillation extraction and solid - phase microextraction for the determination of volatile flavor components 显示文摘 | Cai Jibao Liu Baizhan Su Qingde | 2001 | J Chromatogr A2001，930，： | 1 |
| 15 | Analysis of free and bound volatiles by gas chromatography and gas chromatography-mass spectrometry 显示文摘 | Cai Jibao Liu Baizhan Ling Ping | 2002 | J Chromatogr A2002，947，2： | 1 |
| 16 | Comparison of sinmhaneous distillation extraction and solid- phase microext reaction for the determination of volatile flavor components 显示文摘 | Jibao Cai Baizhan Liu Qingde Su | 2001 | Journal of Chromatography A2001，930，： | 1 |
| 17 | Comparison of simultaneous distillation extraction and solidphase micro extraction for the detection of volatile flavor components 显示文摘 | Cai Jibao Liu Baizhan Su Qingde | 2001 | J Chromat A2001，930，12： | 1 |
| 18 | Exact modal synthesis techniques using residual constraint modes显示文摘 | Qiu Jibao Ying Zuguang Williams F W | 1997 | International Journal for Numerical Methods in Engineering1997，40，13： | 1 |
| 19 | A new molecularly imprinted polymer for selective extraction of cotinine from urine samples by solid-phase extraction显示文摘 | HU Yan YANG Jun CAI Jibao | 2006 | Anal Bioanal Chem2006，384，3： | 1 |
| 20 | Impact of personal and cultural factors on knowledge sharing in China显示文摘 | Qian Huang Robert M. Davison Jibao Gu | 2008 | Asia Pacific Journal of Management2008，，3： | 1 |
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