|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Peat record reflecting Holo-cene climatic change in the Zoige Plateau and AMS radiocarbon dating显示文摘Through the use of reliable AMS dating of high resolution (15-30 years) peat and the establishment of monsoon climate proxies sequence, we have been able to recognize several cold, dry events in the Tibetan Plateau during the Holocene. The more obvious ones occurred around 12800, 11300, 10200, 9580, 8900, 6400, 4400, 3700, 2800 and 1500 cal. aBP. These events correlate well with both ice rafting events recorded in high latitude North Atlantic Ocean sediment cores and cooling events in the low latitude SST. Spectral analysis indicates high frequency climate variation on centennial-millennial time scale during the Holocene. This further reflects Holocene climate instability and the existence of centennial-millenium scale rhythm in mid latitude areas as well. | ZHOU Weijian LU Xuefeng WU Zhengkun DENG Lin A.J.T.Jull D.Donahue W.Beck | 2002 | Chinese Science Bulletin2002，47，1： | 68 |
| 2 | 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 |
| 3 | Evolution of vegetation and climate since the last glacial maximum recorded at Dahu peat site, South China显示文摘Sporopollen analysis on a 346 cm peat record at Dahu, Jiangxi, chronologically constrained by 16 AMS 14C datings, provides an opportunity to reconstruct the vegetation evolution stages responding to cli-mate change in South China since the last glacial maximum. The result shows that during 18330-15630 cal a B.P., broad-leaved forest dominated the area, corresponding to mild, cool and fairly humid climate. At the interval of 15630-11600 cal a B.P., several evergreen broad-leaved species appeared within the broad-leaved forest, indicating moderate and humid condition. During early Holocene, broad-leaved evergreen forest community was constructed as Castanopsis/Lithorcarpus principally developed, suggesting a warm and humid scenario until 6000 cal a B. P. Since 6000 cal a B. P., abrupt forest deterioration happened with an contemporary increase of fern and herb communities, repre-senting a turnover to relatively cool and dry condition and as well, possible impact from human activi-ties. Meanwhile, several relatively cool and dry events can be identified in the sporopollen record, they can be correlated to the North Atlantic Heinrich event, YD and Holocene millennial-scale oscillations, implying that the low latitude climate was coupled with high latitude influences. Moreover, the varia-tions of temperature and humidity since LGM at Dahu were much smaller when compared with the re-cords in north monsoonal China. | XIAO JiaYi Lü HaiBo ZHOU WeiJian ZHAO ZhiJun HAO RuiHui | 2007 | Science China Earth Sciences2007，50，8： | 15 |
| 4 | Large-field high-resolution two-photon digital scanned light-sheet microscopy显示文摘 | Weijian Zong Jia Zhao Xuanyang Chen Yuan Lin Huixia Ren Yunfeng Zhang Ming Fan Zhuan Zhou Heping Cheng Yujie Sun Liangyi Chen | 2015 | Cell Research2015，25，2： | 12 |
| 5 | Microbiota transplantation reveals beneficial impact of berberine on hepatotoxicity by improving gut homeostasis显示文摘Berberine has been shown to reduce acute liver injury although the underlying mechanism is not fully understood. Because of the anatomic connection, the liver is constantly exposed to gut-derived bacterial products and metabolites. In this study, we showed that berberine has beneficial effects on both hepatotoxicity and intestinal damage in a rat model of chronic or acute liver injury. Microbiota transplantation from the rats with chronic hepatotoxicity could aggravate acute hepatotoxicity in mice treated with diethylnitrosamine(DEN). In rat models with gut homeostasis disruption induced by penicillin or dextran sulfate sodium(DSS), their fecal microbiota could also cause an enhanced hepatotoxicity of recipient mice. When treated with berberine,the DSS-induced enteric dysbacteriosis could be mitigated and their fecal bacteria were able to reduce acute hepatotoxicity in recipient mice. This study indicates that berberine could improve intestinal dysbacteriosis, which reduces the hepatotoxicity caused by pathological or pharmacological intervention. Fecal microbiota transplantation might be a useful method to directly explore homeostatic alteration in gut microbiota. | Chenjie Qin Huilu Zhang Linghao Zhao Min Zeng Weijian Huang Gongbo Fu Weiping Zhou Hongyang Wang Hexin Yan | 2018 | Science China(Life Sciences)2018，61，12： | 8 |
| 6 | Estimation of the Type of Low Energy Discharge in GIS Adopting Characteristic Gas显示文摘In order to guarantee safe operations, low energy discharge within gas insulated switchgear (GIS) should be detected as soon as possible before they develop severely and cause final breakdown failures. This paper aims to present a GIS discharge diagnosis technique adopting gaseous decompositions. To reach this aim, needle-plate electrode and the sphere-plate electrode with metallic particles on the plate are designed to simulate two kinds of low energy discharge, namely, corona discharge and spark discharge, respectively. After sampling and analyzing the gases, different yields of gaseous by-products under different types of low energy discharge are obtained. Based on the decomposition mechanisms reported by previous researches and the experiment results, it can be concluded that S2OF10, SO2F2 , and SO2 can be used as the characteristic gas to identify low energy discharge; the increment of S2OF10 can indicate the occurrence of low energy discharges while the volume ratio between SO2F2 and SO2 can define the type of low energy discharge. | CHEN Jun LI Li YAO Weijian TANG Yang ZHENG Xiaoguang YU Jianhui LUO Yunbai ZHOU Wenjun | 2011 | Wuhan University Journal of Natural Sciences2011，16，4： | 7 |
| 7 | Gini Coefficient-based Task Allocation for Multi-robot Systems With Limited Energy Resources显示文摘Nowadays, robots generally have a variety of capabilities, which often form a coalition replacing human to work in dangerous environment, such as rescue, exploration, etc. In these operating conditions, the energy supply of robots usually cannot be guaranteed. If the energy resources of some robots are consumed too fast, the number of the future tasks of the coalition will be affected. This paper will develop a novel task allocation method based on Gini coefficient to make full use of limited energy resources of multi-robot system to maximize the number of tasks. At the same time, considering resources consumption,we incorporate the market-based allocation mechanism into our Gini coefficient-based method and propose a hybrid method,which can flexibly optimize the task completion number and the resource consumption according to the application contexts.Experiments show that the multi-robot system with limited energy resources can accomplish more tasks by the proposed Gini coefficient-based method, and the hybrid method can be dynamically adaptive to changes of the work environment and realize the dual optimization goals. | Danfeng Wu Guangping Zeng Lingguo Meng Weijian Zhou Linmin Li | 2018 | IEEE/CAA Journal of Automatica Sinica2018，5，1： | 6 |
| 8 | Compositions of aliphatic des-A-triterpenes in the Hani peat deposit,Northeast China and its biological significance显示文摘Aliphatic des-A-triterpenes,the degradation products of pentacyclic triterpenes have been tentatively assigned in samples taken from a 963-cm-thick peat sequence from the Hani region of Northeast China using gas chromatography-mass spectrometry(GC-MS)in order to understand and identify these des-A-triterpenes response to climate and ecology.The study indicates that aliphatic des-A-triterpenes are abundant in the Hani peat bog.The high relative abundance of the total des-A-triterpenes mainly occurs at the Holocene periods and is corresponding to the low sedimentation rate.The mechanism of des-A-triterpenes accumulation is not consistent with the previous studies.It is proposed that the biological community is also one influence factor.The obvious stage variations of the total des-A-triterpenes in the whole sequence reveal the different biological(microbes and plants) processes and responses,possibly revealing the four large replacements of biological community and functional composition in the swamp environment over the 16000 cal a BP.The low total des-A-triterpenes values occur at about 10200,8700,7700,6600,4480-3940 and 3040 cal a BP,reflecting the multiple millennial micro-environment oscillations under the macro-environment of the swamp during the Holocene.The ratios of diene and monoene des-A-triterpenes(DT/MT),des-A-lupane and diene and monoene des-A-triterpenes(DL/(DT+MT)),ratios ofindividual compounds exhibit vertical opposite to the total des-A-triterpenes. Namely,these ratios are high during the last deglaciation and late Holocene whereas they are low at other periods,indicating different compounds have different responses to micro-environment and microbial activities.This study discusses the diversity of biological community and biological functional composition response to micro-environment,which not only provides the complement in Northeast China,but also bears important fundamental information for the implication to ecological environment in the future. | ZHENG YanHong ZHOU WeiJian LIU Zhao CHEN QingMin YU XueFeng LIU XiaoMin | 2010 | Chinese Science Bulletin2010，55，21： | 5 |
| 9 | Adaptive coherence estimator based on the Krylov subspace technique for airborne radar显示文摘A novel adaptive detector for airborne radar space-time adaptive detection(STAD) in partially homogeneous environments is proposed. The novel detector combines the numerically stable Krylov subspace technique and diagonal loading technique, and it uses the framework of the adaptive coherence estimator(ACE). It can effectively detect a target with low sample support. Compared with its natural competitors, the novel detector has higher probability of detection(PD), especially when the number of the training data is low. Moreover, it is shown to be practically constant false alarm rate(CFAR). | Weijian Liu Wenchong Xie Haibo Tong Honglin Wang Cui Zhou Yongliang Wang | 2015 | Journal of Systems Engineering and Electronics2015，26，4： | 3 |
| 10 | Two-Year Observation of Fossil Fuel Carbon Dioxide Spatial Distribution in Xi’an City显示文摘The need for atmospheric carbon dioxide(CO2)reduction in the context of global warming is widely acknowledged by the global scientific community.Fossil fuel CO2(CO2ff)emissions occur mainly in cities,and can be monitored directly with radiocarbon(14 C).In this research,annual plants[Setaria viridis(L.)Beauv.]were collected from 26 sites in 2013 and2014 in the central urban district of Xi’an City.The△14C content of the samples were analyzed using a 3 MV Accelerator Mass Spectrometer,and CO2ff concentrations were calculated based on mass balance equations.The results showed that the CO2ff mixing ratio ranged from 15.9 to 25.0 ppm(part per million,equivalent toμmol mol-1),with an average of 20.5 ppm in 2013.The range of measured values became larger in 2014,from 13.9 ppm to 33.1 ppm,with an average of 23.5 ppm.The differences among the average CO2ff concentrations between the central area and outer urban areas were not statistically significant.Although the year-to-year variation of the CO2ff concentration was significant(P<0.01),there was a distinctly low CO2 ff value observed in the northeast corner of the city.CO2 ff emiissions from vehicle exhaust and residential sources appeared to be more significant than two thermal power plants,according to our observed CO2 ff spatial distribution.The variation of pollution source transport recorded in our observations was likely controlled by southwesterly winds.These results could assist in the optimal placement of regional CO2 monitoring stations,and benefit the local government in the implementation of efficient carbon emission reduction measures. | Xiaohu XIONG Weijian ZHOU Shugang WU Peng CHENG Hua DU Yaoyao HOU Zhenchuan NIU Peng WANG Xuefeng LU Yunchong FU | 2020 | Advances in Atmospheric Sciences2020，37，6： | 2 |
| 11 | Suppression of dense false target jamming for stepped frequency radar in slow time domain显示文摘Dear editor,The presence of jamming can drastically degrade the detection performance of a radar system [1]. Dense false target jamming is a paramount type of deceptive jamming, which is employed to counter pulse compression radar [2]. The jamming signal is obtained by storing and transmitting the radiated signal, and it produces a large number of false targets that are similar to target signals at the radar receiver [3]. | Li ZENG Zhaojian ZHANG Yong-Liang WANG Weijian LIU Hui CHEN Bilei ZHOU | 2022 | Science China(Information Sciences)2022，65，3： | 2 |
| 12 | Asynchronous Holocene optimum of the East Asian monsoon显示文摘 | Zhisheng An Stephen C. Porter John E. Kutzbach Wu Xihao Wang Suming Liu Xiaodong Li Xiaoqiang Zhou Weijian | 2000 | Quaternary Science Reviews2000，，8： | 2 |
| 13 | Controllable wave propagation in a weakly nonlinear monoatomic lattice chain with nonlocal interaction and active control显示文摘The one-dimensional monoatomic lattice chain connected by nonlinear springs is investigated, and the asymptotic solution is obtained through the Lindstedt-Poincar′e perturbation method. The dispersion relation is derived with the consideration of both the nonlocal and the active control effects. The numerical results show that the nonlocal effect can effectively enhance the frequency in the middle part of the dispersion curve.When the nonlocal effect is strong enough, zero and negative group velocities will be evoked at different points along the dispersion curve, which will provide different ways of transporting energy including the forward-propagation, localization, and backwardpropagation of wavepackets related to the phase velocity. Both the nonlinear effect and the active control can enhance the frequency, but neither of them is able to produce zero or negative group velocities. Specifically, the active control enhances the frequency of the dispersion curve including the point at which the reduced wave number equals zero, and therefore gives birth to a nonzero cutoff frequency and a band gap in the low frequency range. With a combinational adjustment of all these effects, the wave propagation behaviors can be comprehensively controlled, and energy transferring can be readily manipulated in various ways. | Jiao WANG Weijian ZHOU Yang HUANG Chaofeng LYU Weiqiu CHEN Weiqiu ZHU | 2018 | Applied Mathematics and Mechanics(English Edition)2018，39，8： | 2 |
| 14 | 18F-FLT PET/CT imaging is not competent for the pretreatment evaluation of metastatic gastric cancer: a comparison with 18F-FDG PET/CT imaging显示文摘 | Min Zhou Chenchen Wang Silong Hu Yongping Zhang Zhifeng Yao Jin Li Weijian Guo Yingjian Zhang | 2013 | Nuclear Medicine Communications2013，，7： | 2 |
| 15 | Variability of Monsoon Climate in East Asia at the End of the Last Glaciation显示文摘 | Zhou Weijian Douglas J. Donahue Stephen C. Porter Timothy A. Jull Li Xiaoqiang Minze Stuiver An Zhisheng Eiji Matsumoto Dong Guangrong | 1996 | Quaternary Research1996，，3： | 1 |
| 16 | Fluctuation in a nonlinear process laser field with coupling of additive noise terms显示文摘 | Zhou Xiaoping Gao Weijian Zhu Shiqun | 1996 | Phys Lett A1996，214，： | 1 |
| 17 | Cyclic-anion salt for high-voltage stable potassium-metal batteries显示文摘Electrolyte anions are critical for achieving high-voltage stable potassium-metal batteries(PMBs).However,the common anions cannot simultaneously prevent the formation of‘dead K’and the corrosion of Al current collector,resulting in poor cycling stability.Here,we demonstrate cyclic anion of hexafluoropropane-1,3-disulfonimide-based electrolytes that can mitigate the‘dead K’and remarkably enhance the high-voltage stability of PMBs.Particularly,even using low salt concentration(0.8 M)and additive-free carbonate-based electrolytes,the PMBs with a high-voltage polyanion cathode(4.4 V)also exhibit excellent cycling stability of 200 cycles with a good capacity retention of 83%.This noticeable electrochemical performance is due to the highly efficient passivation ability of the cyclic anions on both anode and cathode surfaces.This cyclic-anion-based electrolyte design strategy is also suitable for lithium and sodium-metal battery technologies. | Yanyao Hu Ling Fan Apparao M.Rao Weijian Yu Caixiang Zhuoma Yanhong Feng Zhihui Qin Jiang Zhou Bingan Lu | 2022 | National Science Review2022，9，10： | 1 |
| 18 | Small sample dating in China显示文摘 | Zhou Weijian Head M J Kaihola L | 1994 | Radiocarbon1994，36，1： | 1 |
| 19 | The reliability of AMS radiocarbon dating of shells from China显示文摘 | Zhou Weijian Head M J Jull A J T | 1999 | Radiocarbon1999，41，1： | 1 |
| 20 | Lipid biomarkers in the Zoigê-Hongyuan peat deposit: Indicators of Holocene climate changes in West China显示文摘 | Yanhong Zheng Weijian Zhou Philip A. Meyers Shucheng Xie | 2007 | Organic Geochemistry2007，，11： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员