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| 1 | Vegetation evolution on the central Chinese Loess Plateau since late Quaternary evidenced by elemental carbon isotopic composition显示文摘There are many controversial issues in loess studies such as natural vegetation types on the Chinese Loess Plateau during the historical periods and the spatial and temporal evolution of C3/C4 plants. Elemental carbon isotopic composition (δ13Cec) in the loess section may offer new evidence for these problems. Elemental carbon (EC) is produced by incomplete combustion of vegetation, and its carbon isotopic composition has a very small difference from that of the formal vegetation, then δ13Cec can be used as a record to recover the changes of vegetation. Elemental carbon was extracted by applying the oxidation method from the loess-paleosol sequence in the central Chinese Loess Plateau, and its carbon isotope composition was analyzed by the isotope mass spectrometer. The results showed that the vegetation in this region was a mixed type of C3 and C4 plants, dominated with C3 plants in most of the time. Since late Quaternary, C3/C4 plants may not follow a simple glacial-interglacial cycle mode on the Chinese Loess Plateau, but showing fluctuations. C3 plants increased gradually in L4 period, and more C3 plants occurred during S3 period, and C4 plants increased again during L3―L2 periods, after that, C3 plants dominated again during S1―S0 periods. During periods of paleosol development, C3 plants were abundant in S3 and S1, and there were more C4 plants in S2 and S0. During periods of loess sedimen- tation, there were more C3 plants in L4 and L1, and there were more C4 plants in L3 and L2. On the or- bital timescale, the vegetation variations revealed by δ13Cec record are consistent with the results of pollen data and also similar to the results obtained by organic carbon isotopic composition since the last glacial period. | ZHOU Bin SHEN ChengDe ZHENG HongBo ZHAO MeiXun SUN YanMin | 2009 | Chinese Science Bulletin2009，54，12： | 6 |
| 2 | ^(10)Be/~7Be implies the contribution of stratosphere-troposphere transport to the winter-spring surface O_3 variation observed on the Tibetan Plateau显示文摘10Be/7Be is a stratospheric sensitive tracer.In this paper,measurements of 10Be/7Be and surface O3 from October 2005 to May 2006 at Mt.Waliguan (hereafter WLG,100.898°E,39.287°N,3810 m,a.s.l.),China global atmospheric watch (GAW) observatory,are introduced and used to investigate the stratosphere-troposphere transport (STT) and its impact on surface O3 on the Tibetan Plateau.The results show that the magnitude of STT is weak in winter,followed by strengthening from the end of winter to the middle of spring (from mid February to mid April) with large increases in 10Be,7Be,10Be/7Be and surface O3.At the end of spring (from the end of April to mid May in this paper),the STT weakened,and the continuous increase of surface O3 at WLG is produced by tropospheric photochemistry reactions. | ZHENG XiangDong SHEN ChengDe WAN GuoJiang LIU KeXin TANG Jie XU XiaoBin | 2011 | Chinese Science Bulletin2011，56，1： | 5 |
| 3 | Copy number variants of ABCF1, IL17REL, and FCGR3A are associated with the risk of gout显示文摘 | Dong, Zheng Li, Yuan Zhou, Jingru Jiang, Shuai Wang, Yi Chen, Yulin Zhao, Dongbao Yang, Chengde Qian, Qiaoxia Ma, Yanyun He, Hongjun Ji, Hengdong Yang, Yajun Wang, Xiaofeng Xu, Xia Pang, Yafei Zou, Hejian Jin, Li Zhang, Feng Wang, Jiucun | 2017 | Protein & Cell2017，8，6： | 3 |
| 4 | Research on System Control and Energy Management Strategy of Flux-Modulated Compound-Structure Permanent Magnet Synchronous Machine显示文摘The flux-modulated compound-structure permanent magnet synchronous machine (CS-PMSM), composed of a brushless double rotor machine (DRM) and a conventional permanent magnet synchronous machine (PMSM), is a power split device for plug-in hybrid electric vehicles. In this paper, its operating principle and mathematical model are introduced. A modified current controller with decoupled state feedback is proposed and verified. The system control strategy is simulated in Matlab, and the feasibility of the control system is proven. To improve fuel economy, an energy management strategy based on fuzzy logic controller is proposed and evaluated by the Urban Dynamometer Driving Schedule (UDDS) drive cycle. The results show that the total energy consumption is similar to that of Prius 2012. | Jiaqi Liu Chengde Tong Zengfeng Jin Guangyuan Qiao Ping Zheng | 2017 | CES Transactions on Electrical Machines and Systems2017，1，2： | 2 |
| 5 | Modification of Norditerpenoid Alkaloids:Ⅱ.A Simple andConvenient Preparation of the Imine Derivatives of Norditerpenoid Alkaloids显示文摘Treatment of 3-acetylpseudaconie 6 and 3. 13-diacetylyunnaconitine 9 withNBS/acetone-H2O(2:1) at room temperature produced corresponding imine derivatives & and 10.respectively. in good yields. This is a novel simple and convenient method for preparation of theimine compounds. | Feng Peng WANG Zheng Bang LI Jin Song YANG and Bo Gang LI(Department of Chemistry of Medicinal Natural Products School of PharmacyWest China University of Medical Sciences. Chengdu 610041 Chengdu Institute of Biology. Chinese Academy of Sciences. Chengd | 1999 | Chinese Chemical Letters1999，10，6： | 1 |
| 6 | Improved robust stability criteria for delayedcellular neural networks via the LMI approach 显示文摘 | Zheng Chengde Zhang Huaguang Wang Zhans-han | 2010 | IEEE Trans Circuits and Systems II2010，57，1： | 1 |
| 7 | Discrimination of different kinds of Luzhou-flavor raw liquors based on their volatile features显示文摘 | ZHENG Jia LIANG Ru WU Chengde | 2014 | Food Research International2014，56，： | 1 |
| 8 | Novel exponential stability criteria of high-order neural networks with timevarying delays显示文摘 | ZHENG Chengde ZHANG Huaguang WANG Zhanshan | 2011 | IEEE Transactions on Systems Man and Cybernetics Part B :Cybernetics2011，41，2： | 1 |
| 9 | IGBT Temperature Field Monitoring Based on Reduced-order Model显示文摘With the rapid development of the world economy,IGBT has been widely used in motor drive and electric energy conversion.In order to timely detect the fatigue damage of IGBT,it is necessary to monitor the junction temperature of IGBT.In order to realize the fast calculation of IGBT junction temperature,a finite element method of IGBT temperature field reduction is proposed in this paper.Firstly,the finite element calculation process of IGBT temperature field is introduced and the linear equations of finite element calculation of temperature field are derived.Temperature field data of different working conditions are obtained by finite element simulation to form the sample space.Then the covariance matrix of the sample space is constructed,whose proper orthogonal decomposition and modal extraction are carried out.Reasonable basis vector space is selected to complete the low dimensional expression of temperature vector inside and outside the sample space.Finally,the reduced-order model of temperature field finite element is obtained and solved.The results of the reduced order model are compared with those of the finite element method,and the performance of the reduced-order model is evaluated from two aspects of accuracy and rapidity. | Ziyu Zhou Yi Su Xu Zhang Chengde Tong Ping Zheng Mingjun Zhu | 2023 | CES Transactions on Electrical Machines and Systems2023，7，2： | 0 |
| 10 | Message from Editors显示文摘SPECIAL motor systems are high-efficiency and high-quality electromechanical energy conversion devices suitable for complex operating conditions.As key components,special motor systems are widely used in the fields of aerospace,energy,power,transportation,high-end manufacturing,etc.Innovations of fundamental theories and application technologies in special motor systems can promote the progress of related disciplines and fields,which has drawn great attentions from countries all over the world. | Ping Zheng Fengge Zhang Shoudao Huang Deliang Liang Bo Zhou Xiuhe Wang Wei Hua Wenxiang Zhao Xiaoyong Zhu Chengde Tong Jingang Bai Yi Sui Mingqiao Wang | 2022 | CES Transactions on Electrical Machines and Systems2022，6，1： | 0 |
| 11 | Mass and isotopic concentrations of water-insoluble refractory carbon in total suspended particulates at Mt.Waliguan Observatory(China)显示文摘Mass concentration and isotopic values δ^(13)C and ^(14)C are presented for the water-insoluble refractory carbon(WIRC) component of total suspended particulates(TSP),collected weekly during 2003,as well as from October 2005 to May 2006 at the WMO-GAW Mt.Waliguan(WLG) site.The overall average WIRC mass concentration was(1183±120)ng/m^3(n = 79),while seasonal averages were 2081 ±1707(spring),454±205(summer),650±411(autumn),and 1019±703(winter) ng/m3.Seasonal variations in WIRC mass concentrations were consistent with black carbon measurements from an aethalometer,although WIRC concentrations were typically higher,especially in winter and spring.The δ^(13)C PDB value(-25.3 ± 0.8)%.determined for WIRC suggests that its sources are C_3 biomass or fossil fuel combustion.No seasonal change in δ^(13)C PDB was evident.The average percent Modern Carbon(pMC) for ^(14)C in WIRC for winter and spring was(67.2 ± 7.7)%(n = 29).Lower pMC values were associated with air masses transported from the area east of WLG,while higher pMC values were associated with air masses from the Tibetan Plateau,southwest of WLG.Elevated pMC values with abnormally high mass concentrations of TSP and WIRC were measured during a dust storm event. | Xiangdong Zheng Chengde Shen Guojiang Wan Jie Tang Kexin Liu | 2015 | Particuology2015，13，3： | 0 |
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