维普中文期刊产品整合服务
423篇 您的检索式:作者名="YuanQ"
    题名 作者 年代 出处 被引量
1Further support for a Cretaceous age for the feathered-dinosaur beds of Liaoning,China:New ^(40)Ar/^(39)Ar dating of the Yixian and Tuchengzi Formations显示文摘We report new 40Ar/39Ar dating results ob-tained from total fusion and incremental-heating analyses of sanidine and biotite from three tuffs found interbedded within the fossil-bearing deposits of Liaoning, northeast China. The first is a new sample of the Bed 6 Sihetun tuff from the Yixian Formation, previously dated by our team as middle Early Cretaceous, and recently considered by Lo et al., partially reset due to metamorphism from a nearby ba-saltic sill. The second is the Yixian Bed 9 tuff from Heng-daozi considered by Lo et al. to be unaffected by metamor-phism and whose age, based on total fusion 40Ar/39Ar dating of biotite, argues for a Jurassic age for the Yixian Formation. The third tuff is a previously undated tuff from the upper part of the underlying Tuchengzi Formation. Single crystal total fusion 40Ar/39Ar analyses of the Sihetun sanidine showed homogeneous radiogenic Ar, Ca/K ratios, excellent reproducibility and gave a mean age of 125.0 ± 0.18 (1SD) ± 0.04 (SE) Ma. Single sanidineC. C. Swisher III, WANG Xiaolin, ZHOU Zhonghe, WANG Yuanqing, JIN Fan, ZHANG Jiangyong , XU Xing, ZHANG Fucheng & WANG YuanDepartment of Geological Sciences, Wright Labs, Rutgers University, Piscataway, New Jersey 08854, USA (e-mail: cswish@rutgers. rci.e 2002Chinese Science Bulletin2002,47,2:83
2Regional Disparity and Convergence of China's Inbound Tourism Economy显示文摘Comprehending regional characteristics and influencing factors of China's inbound tourism economy is im-portant to make effective policies that will help inbound tourism develop harmoniously and shrink regional disparity.This paper studied the regional disparity and convergence of China's inbound tourism economy during 1996-2008 with the methods of σ-convergence,club convergence and β-convergence.The results indicate that 1) inbound tourism receipts per capita(ITRPC) of the whole country,the eastern,central and western regions presented the rapid increas-ing trend;2) ITRPC of the whole country was characterized by convergence;3) the eastern region presented club con-vergence,but the central and western regions did not show this trend;4) the star-hotel levels and investment in fixed assets for the tourism industry per capita had a same trend to growth rates of ITRPC,promoting inbound tourism de-velopment,and there was no difference among the 31 provinces(municipalities) in the mainland of China;5) but the proportion of employed persons in the tourism industry accounting for total population and the proportion of the terti-ary industry accounting for GDP had a reversal trend to growth rates of ITRPC,shrinking the provincial disparity in inbound tourism economy,and there were differences between the developed provinces and the developing provinces.Based on these analyses,we put forward some suggestions for the developing provinces to speed up inbound tourism economy.WANG Shuxin HE Yuanqing WANG Xueding ZHU Guofeng CAO Weihong 2011Chinese Geographical Science2011,21,6:40
3Altitude dependency of trends of daily climate extremes in southwestern China, 1961-2008显示文摘A total of 12 indices of temperature extremes and 11 indices of precipitation ex-tremes at 111 stations in southwestern China at altitudes of 285-4700 m were examined for the period 1961-2008. Significant correlations of temperature extremes and elevation in-cluded the trends of diurnal temperature range, frost days, ice days, cold night frequency and cold day frequency. Regional trends of growing season length, warm night frequency, coldest night and warmest night displayed a statistically significant positive correlation with altitude. These characteristics indicated the obvious warming with altitude. For precipitation extreme indices, only the trends of consecutive dry days, consecutive wet days, wet day precipitation and the number of heavy precipitation days had significant correlations with increasing alti-tude owing to the complex influence of atmospheric circulation. It also indicated the increased precipitation mainly at higher altitude areas, whereas the increase of extreme precipitation events mainly at lowers altitude. In addition, the clearly local influences are also crucial on climate extremes. The analysis revealed an enhanced sensitivity of climate extremes to ele-vation in southwestern China in the context of recent warming.Li Zongxing He Yuanqing Theakstone, Wilfred H. Wang Xufeng Zhang Wei Cao Weihong Du Jiankuo Xin Huijuan Chang Li 2012Journal of Geographical Sciences2012,22,3:36
4The application of CAR-T cell therapy in hematological malignancies: advantages and challenges显示文摘Chimeric antigen receptor T cell(CAR-T cell) therapy is a novel adoptive immunotherapy where T lymphocytes are engineered with synthetic receptors known as chimeric antigen receptors(CAR).The CAR-T cell is an effector T cell that recognizes and eliminates specific cancer cells, independent of major histocompatibility complex molecules. The whole procedure of CAR-T cell production is not well understood. The CAR-T cell has been used predominantly in the treatment of hematological malignancies,including acute lymphoblastic leukemia, chronic lymphocytic leukemia, lymphoma, and multiple myeloma. Solid tumors including melanoma, breast cancer and sarcoma offer great promise in CAR-T cell research and development. CD19 CAR-T cell is most commonly used, and other targets, including CD20, CD30, CD38 and CD138 are being studied. Although this novel therapy is promising, there are several disadvantages. In this review we discuss the applications of CAR-T cells in different hematological malignancies, and pave a way for future improvement on the effectiveness and persistence of these adoptive cell therapies.Zijun Zhao Yu Chen Ngiambudulu M.Francisco Yuanqing Zhang Minhao Wu 2018Acta Pharmaceutica Sinica B2018,8,4:22
5The existing time of Sihetun vertebrate in western Liao-ning,China——Evidence from U-Pb dating of zircon显示文摘In different opinions, the stratigraphic time of the feathered dinosaurs and early birds in Sihetun and its neighboring areas in Beipiao, western Liaoning is appointed to different epoches of eras, such as Late Jurassic, Early Cretaceous and Late Jurassic-Early Cretaceous. Even the recently dating data are still very different. This note first reported the U-Pb age of (125.2±0.9) Ma of zircon separated from tuff of Sihetun vertebrates horizon. The age reveals that Sihetun vertebrate belongs to Early Cretaceous. The method is more objective, because of the strong ability of disturbance resistance and high U-Pb blocking temperature of zircons.WANG Songshan WANG Yuanqing HU Huaguang LI Huimin 2001Chinese Science Bulletin2001,46,9:20
6Effects of Ce and Sb on the microstructure and properties of AZ91D magnesium alloy prepared by the EPC process显示文摘The effects of small amounts of cerium and antimony additions on the microstructure and the mechanical properties of AZ91D(Mg-9Al-Zn) based alloy were researched via the expendable pattern casting(EPC) process.The results show that the microstructure is obviously refined and the tensile strength of the AZ91D based alloy at ambient temperature is significantly improved.When compared to AZ91D,the AZ91D-1.0%Ce-0.4%Sb alloy has higher ultimate tensile strength and elongation.Its ultimate tensile strength and elongation are enhanced by 39% and 47%,respectively.The morphology of the tensile fracture of the AZ91D-1.0%Ce-0.4%Sb alloy has more characteristics of quasi-cleavage.This indicates that it has had a larger plastic deformation before failure.The tensile strength and elongation decrease with the increase of Ce and Sb contents because of the coarsening and volume increase of CeSb and Al11Ce3 phases.LI Jiqiang DONG Xuanpu FAN Zitian WANG Yuanqing 2008Rare Metals2008,27,1:19
7Pattern of stress change and its effect on seismicity rate caused by M_s8.0 Wenchuan earthquake显示文摘We use five published source models to calculate the Coulomb failure stress changes induced by the Ms8.0 Wenchuan earthquake, and analyze the association between stress changes and the subsequent earthquakes. Based on the analysis of uncertainties resulting from source models, we determine the stress changes on nearby faults caused by the Wenchuan earthquake. Moreover, we focus on the seismicity rate change as a function of time on every fault under the influence of stress changes. The results indicate that the spatial distributions of aftershocks correlate well with the regions where stress is calculated to increase using the related models. The largest lobes of dropped stress lie in the west and east sides of source fault. The largest lobes of increased failure stress close to southern and northern ends of the source fault extend into the whole source failure plane. In addition, another region of increased stress lies in the Wenchuan-Yingxiu zone close to the southern segment of source fault, where a large number of aftershocks have occurred. And subsequent earthquakes seem to extend to even more remote distances; therefore, this area also has a high risk of seismic hazard. We find that the positive stress changes on nearby faults imposed by the Wenchuan earthquake produce an encouraging effect on seismicity rate. The effect is most significant on the Pengxian-Guanxian fault and Qingchuan fault, the value of seismicity rate maintains two times greater than the value before the mainshock for the next hundred years on these faults, and the time needed for the aftershock rate to recover to the pre-mainshock seismicity rate can reach up to 800-900 yr. The influence is not significant on the western Qinling fault, the Longquanshan fault, the Xianshuihe fault, the Yulongxi fault, the Anninghe fault, the Minjiang fault, and the Aba fault. Compared with the seismicity rate on these faults before the mainshock, the aftershock rate is raised by less than two times, and the time of perturbation duration is not long. The stress changes on the Fubianhe fault and Huya fault are negative, which reduce the seismicity for the next thousand years. Under the influence of stress changes caused by the Wenchuan earthquake, both Pengxian-Guanxian fault and Qingchuan fault have a high risk of earthquake occurrence.XIE ChaoDi ZHU YuanQing LEI XingLin YU HaiYing HU XiongLin 2010Science China Earth Sciences2010,53,9:17
8Spatial distribution and temporal trends in potential evapotranspiration over Hengduan Mountains region from 1960 to 2009显示文摘在 19612009 期间在 Hengduan 山区域基于 20 个车站的气象学的数据,潜在的土壤水分蒸发蒸腾损失总量的年度、季节的变化与 Penman-Monteith 模型一起在联合被分析。与在 ArcGIS 下面的花键插值的方法,潜在的土壤水分蒸发蒸腾损失总量的空间分发被介绍研究地区性的差别,并且关联分析被用来讨论影响潜在的土壤水分蒸发蒸腾损失总量的主导的因素。结果显示自从 1960 年代,年度潜在的土壤水分蒸发蒸腾损失总量显示出一个减少的趋势,特别从 1980 年代到 1990 年代,当自从 2000,它显示出一个增加的趋势时。地区性的潜在的土壤水分蒸发蒸腾损失总量显示出 0.17 公里 a1 的率。在 Hengduan 山的北方,中间和南方的潜在的土壤水分蒸发蒸腾损失总量在学习时期上展出了减少的趋势,并且它的地区性的趋势在从西南的衰落上到东北。ZHU Guofeng HE Yuanqing PU Tao WANG Xufeng JIA Wenxiong LI Zongxing XIN Huijuan 2012Journal of Geographical Sciences2012,22,1:16
9Source of major anions and cations of snowpacks in Hailuogou No.1 glacier, Mt. Gongga and Baishui No.1 glacier, Mt. Yulong显示文摘积雪场样品是从二条冰河的 colleted:在 2006 年 6 月的 Baishui No.1 冰河和 Hailuogou No.1 冰河。海盐离子 tracer。LI Zongxing HE Yuanqing PANG Hongxi YANG Xiaomei JIA Wenxiong ZHANG Ningning WANG Xufeng NING Baoying YUAN Lingling SONG Bo 2008Journal of Geographical Sciences2008,18,1:13
10The Performance of Whole Genome Amplification Methods and Next-Generation Sequencing for Pre-Implantation Genetic Diagnosis of Chromosomal Abnormalities显示文摘Reliable and accurate pre-implantation genetic diagnosis(PGD) of patient's embryos by next-generation sequencing(NGS) is dependent on efficient whole genome amplification(WGA) of a representative biopsy sample. However, the performance of the current state of the art WGA methods has not been evaluated for sequencing. Using low template DNA(15 pg) and single cells, we showed that the two PCR-based WGA systems Sure Plex and MALBAC are superior to the REPLI-g WGA multiple displacement amplification(MDA) system in terms of consistent and reproducible genome coverage and sequence bias across the 24 chromosomes, allowing better normalization of test to reference sequencing data. When copy number variation sequencing(CNV-Seq) was applied to single cell WGA products derived by either Sure Plex or MALBAC amplification, we showed that known disease CNVs in the range of 3e15 Mb could be reliably and accurately detected at the correct genomic positions. These findings indicate that our CNV-Seq pipeline incorporating either Sure Plex or MALBAC as the key initial WGA step is a powerful methodology for clinical PGD to identify euploid embryos in a patient's cohort for uterine transplantation.Na Li Li Wang Hui Wang Minyue Ma Xiaohong Wang Yi Li Wenke Zhang Jianguang Zhang David S.Cram Yuanqing Yao 2015Journal of Genetics and Genomics2015,42,4:13
11Trajectory tracking control of a VTOL unmanned aerial vehicle using offset-free tracking MPC显示文摘Designing a stable and robust flight control system for an Unmanned Aerial Vehicle(UAV)is an arduous task.This paper addresses the trajectory tracking control problem of a Ducted Fan UAV(DFUAV)using offset-free Model Predictive Control(MPC)technique in the presence of various uncertainties and external disturbances.The designed strategy aims to ensure adequate flight robustness and stability while overcoming the effects of time delays,parametric uncertainties,and disturbances.The six degrees of freedom DFUAV model is divided into three flight modes based on its airspeed,namely the hover,transition,and cruise mode.The Dryden wind turbulence is applied to the DFUAV in the linear and angular velocity component.Moreover,different uncertainties such as parametric,time delays in state and input,are introduced in translational and rotational components.From the previous work,the Linear Quadratic Tracker with Integrator(LQTI)is used for comparison to corroborate the performance of the designed controller.Simulations are computed to investigate the control performance for the aforementioned modes and different flight phases including the autonomous flight to validate the performance of the designed strategy.Finally,discussions are provided to demonstrate the effectiveness of the given methodology.Tayyab MANZOOR Yuanqing XIA Di-Hua ZHAI Dailiang MA 2020Chinese Journal of Aeronautics2020,33,7:10
12A new species of Gobiconodon(Triconodonta, Mammalia) and its implication for the age of Jehol Biota显示文摘A new species of Gobiconodon is found from the Yixian Formation of western Liaoning, China. The new taxa, G. zofiae sp. nov., has a confluent opening for branches Ⅱ and Ⅲ of the trigeminal nerve on the anterior lamina of the petrosal. G. zofiae sp. nov. is similar to Repenomamus in having an ossified Meckels cartilage connecting the lower jaws and ear region. The new species, with enlarged I1/I1, posteriorly located infraorbital foramen and four mental foramina, distinctly differs from the other species of Gobiconodon. The new material indicates that Gobiconodon has four, not five, upper molariforms. The presence of Gobiconodon in Jehol Biota makes it possible to correlate Jehol Biota with faunas in eastern Asia and North America, and suggests the age of the Yixian Formation to be Early Cretaceous.LI Chuankui WANG Yuanqing HU Yaoming MENG Jin 2003Chinese Science Bulletin2003,48,11:10
13Branched tetraether lipids in Chinese soils:Evaluating the fidelity of MBT/CBT proxies as paleoenvironmental proxies显示文摘The ubiquitous occurrence of branched glycerol dialkyl glycerol tetraethers(br GDGTs) in soils has allowed development of new proxies for reconstruction of past climate and environment. The methylation and cyclization degrees of br GDGTs, expressed as MBT and CBT, respectively, are reported to be mainly controlled by mean annual air temperature(MAAT) and soil p H. However, the br GDGT-derived temperatures and soil p H scatter widely when data from different environmental conditions are considered. In this study, we collected over 300 soil samples from China, which are representative of humid(Xishuangbanna, Guangzhou, and Shanghai), semi-arid(Dongying) and semi-arid/arid(Lanzhou, Tibetan Plateau) regions. Collectively we have the most extensive dataset that broadly characterizes the distribution of br GDGTs according to climate zones in China. The overall data demonstrate that the MBT/CBT derived temperatures better match the measured MAATs in humid and non-alkaline regions than those from regions of low MAP(<400 mm/yr) and above neutral soil p H(>7.0–7.5). Similarly, CBT describes soil p H much better in humid and non-alkaline soils than in semi-arid/arid and alkaline soils; the semi-arid/arid and alkaline soils tend to show a positive correlation between soil p H and CBT, which contradicts that in the humid and non-alkaline soils. While soil p H, MAAT and mean annual precipitation(MAP) are dominating factors controlling the br GDGT distribution across all climate zones, conductivity, total organic carbon and total nitrogen, as well as soil water content can also play an important role locally. Removing br GDGT-II resulted in a revised CBT index that provides more accurate estimation of p H, especially in semi-arid/arid and alkaline soils. The overall Chinese dataset demonstrates that continental air temperature derived from br GDGT-proxies can vastly deviate from real measurements and should be used with extreme caution in paleo-climate or-environment studies.ZHENG FengFeng ZHANG ChuanLun CHEN YuFei LI FuYan MA CenLing PU Yang ZHU YuanQing WANG YongLi LIU WeiGuo 2016Science China Earth Sciences2016,59,7:10
14The Interaction between Control and Computing Theories:New Approaches显示文摘Day by day, networked control system(NCS) methods have been promoted for distributed closed-loop control systems.Interestingly, the integration of control and computing theories enhanced the development of networked control systems through remote control for wide applications employing the internet. Two further directions to networked control technology are LeaderFollower systems and model predictive control systems. Cloud control system is looked at an extension of networked control systems(NCS) using internet of things(IOT) methodologies. In this paper, a comprehensive literature survey of the new technology of control systems application performed on cloud computing is presented.Magdi S.Mahmoud Yuanqing Xia 2017International Journal of Automation and computing2017,14,3:9
15Visual Fixation Assessment in Patients with Disorders of Consciousness Based on Brain-Computer Interface显示文摘Visual fixation is an item in the visual function subscale of the Coma Recovery Scale-Revised(CRS-R).Sometimes clinicians using the behavioral scales find it difficult to detect because of the motor impairment in patients with disorders of consciousness(DOCs). Braincomputer interface(BCI) can be used to improve clinical assessment because it directly detects the brain response to an external stimulus in the absence of behavioral expression. In this study, we designed a BCI system to assist the visual fixation assessment of DOC patients. The results from 15 patients indicated that three showed visual fixation in both CRS-R and BCI assessments and one did not show such behavior in the CRS-R assessment but achieved significant online accuracy in the BCI assessment. The results revealed that electroencephalography-based BCI can detect the brain response for visual fixation. Therefore,the proposed BCI may provide a promising method for assisting behavioral assessment using the CRS-R.Jun Xiao Jiahui Pan Yanbin He Qiuyou Xie Tianyou Yu Haiyun Huang Wei Lv Jiechun Zhang Ronghao Yu Yuanqing Li 2018Neuroscience Bulletin2018,34,4:9
16Synoptic-scale variation of δ^(18)O in summer monsoon rainfall at Lijiang, China显示文摘Based on the daily δ^(18)O data in June―September 2003 at Lijiang and the daily mean NCEP/ NCAR reanalysis data, synoptic-scale variation of δ^(18)O in summer monsoon rainfall was investigated. The 'precipitation amount effect' is obvious for the daily δ^(18)O variation, whereas the 'temperature effect' is insignificant. Alternate occurrences of active phase and break phase of the southwest monsoon probably influence the synoptic-scale δ^(18)O variation prominently. Moreover, the isotopic composition in precipitation during the late monsoon months is presumably influenced significantly by recycling of monsoon precipitation. Both the above factors disturb the 'amount effect' of isotopic variation in the monsoon region. This study also indicates that the synoptic-scale rainfall δ^(18)O variation at Lijiang in summer is domi-nated by the Indian monsoon depression (low pressure) system at large scale. These results are important for further studying the 'amount effect' and reconstructing paleoclimate in the monsoon region.PANG Hongxi HE Yuanqing LU Aigang ZHAO Jingdong NING Baoying YUAN Lingling SONG Bo 2006Chinese Science Bulletin2006,51,23:9
17Effect of Landform on Seasonal Temperature Structures across China in the Past 52 Years显示文摘The data of 160 national meteorological observatory stations including the long-term monthly temperature data in China were analyzed to study the seasonal variation of the spatial temperature structures across China in the past half century. It is found that temperature structures differ between seasons: a latitude temperature pattern in winter and a landform temperature pattern in summer, which indicate that the effect of landform on temperature structure is much stronger in summer than that in winter and the effect of latitudinal temperature is much stronger in winter than that in summer. The mechanisms of the seasonal difference in temperature structures are also discussed in this paper.LU Aigang PANG Deqian GE Jianping HE Yuanqing PANG Hongxi YUAN Lingling 2006Journal of Mountain Science2006,3,2:7
18Further results on cloud control systems显示文摘This paper is devoted to further investigating the cloud control systems(CCSs). The benefits and challenges of CCSs are provided. Both new research results of ours and some typical work made by other researchers are presented. It is believed that the CCSs can have huge and promising effects due to their potential advantages.Yuanqing XIA Yongming QIN Di-Hua ZHAI Senchun CHAI 2016Science China(Information Sciences)2016,59,7:6
19Theoretical analysis and numerical simulation on behaviour properties of large span cable-supported structures under fire conditions显示文摘Large span cable-supported structures have been developed rapidly in China, and they always adopt high-strength steel cables as structural members. However, the modulus of elasticity and yield strength of steel material will decrease seriously under fire conditions while fire protection is unlikely to be provided for steel cable. Several typical large span cable-supported structures such as cable truss, beam string structure and prestressed cable net are studied on their structural behaviour in this paper. Theoretical formulae are derived in terms of geometrical and material nonlinearity with high temperature effect. Finite element models are also established to simulate the structural performance under fire conditions. The calculation formulae for fire-resisting design are suggested for these three types of structures, while displacement and prestressed force variation rules are also given.BAI Yin SHI YongJiu WANG YuanQing 2009Science China(Technological Sciences)2009,52,8:6
20Chinese Continental Paleocene-Eocene Boundary and Its Correlation显示文摘同位素的调查提供了新证据支持的最近的 paleontological, paleomagnetic 和碳在在 Hengyang 盆的 Lingcha 形成的底的中国陆上的 PaleoceneEocene 边界的放置,湖南省,并且在在 Erlian 盆的 Nomogen 形成的上面的部分以内,内部蒙古。基于哺乳动物并且 ostracod biostratigraphic 数据,边界能粗略地也在广东, Qingjiang 和江西, Funing 组的第四形成和 Dainan 形成的 Xinyu 形成的 Sanshui 盆与在 Baoyue 和 Huayong 形成之间的接触被相关在北江苏,并且在 Xinjiang 的 Turfan 盆的 Dabu 和 Shisanjianfang 形成。WANG Yuanqing TONG Yongsheng LI Qian 2011Acta Geologica Sinica(English Edition)2011,85,2:6
返回顶部 每页显示:
共22页 首页 上一页 第1页 下一页 末页 /22 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费