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Sporopollen analysis of Core B10 in the southern Yellow Sea and the reflected characteristics of climate changes

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Chinese Science Bulletin 2003年第B06期48卷 42-48页

作者： FU Mingzuo~(1,2,3), li Zhen~1, XU Xiaowei~1 & SHl Xuefa~1 1. Key Laboratory of Marine Sedimentology and Environmental geology, First institute of Oceanography. State Oceanic administration, Qingdao 266061. china 2. institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071. china 3. Graduate School, Chinese Academy of Sciences, beijing 100039. china 1. Key Laboratory of Marine Sedimentology and Environmental geology First institute of Oceanography State Oceanic Administration 266061 Qingdao China 2. institute of Oceanology Chinese Academy of Sciences 266071 Qingdao China 3. Graduate School Chinese Academy of Sciences 100039 Beijing China

Eight sporopollen zones have been divided based on the results of high-resolution sporopollen analysis of Core B10 in the southern Yellow Sea. Based on the results along with ^14C datings and the subbottom profiling data,climatic and environmental changes since the last stage of late Pleistocene are discussed. The main conclusions are drawn as follows: (1) the vegetation evolved in the process of coniferous forest-grassland containing broad-leaved trees→coniferous and broad-leaved mixed forest→coniferons and broad-leaved mixed forest-grassland prevailed by coniferous trees→coniferous and broad-leaved mixed forest-grassland containing evergreen broad-leaved trees→coniferons and broad-leaved mixed forest-grassland prevailed by broadleaved trees→deciduous broad-leaved forest-meadow containing evergreen broad-leaved trees→coniferous and broadleaved mixed forest-grassland prevailed by broad-leaved trees→coniferous and broad-leaved mixed forest containing evergreen broad-leaved trees; (2) eight stages of climate changes are identified as the cold and dry stage, the temperate and wet stage, the cold and dry stage, the warm and dry stage, the temperate and wet stage, the hot and dry stage, the temperate and dry stage, then the warm and dry stage in turn; (3) the sedimentary environment developed from land,to littoral zone, to land again, then to shore-neritic zone; and (4) the Yellow Sea Warm Current formed during early-Holocene rather than Atlantic stage.

关键词：中国黄海气候变化碳14年代测定底基压型数据更新世沉积环境大西洋

Combination and superimposition of source kitchens and their effects on hydrocarbon accumulation in the hinterland of the Junggar Basin,west china

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Petroleum Science 2010年第1期7卷 59-72页

作者： zhang Zhihuan Qin liming Qiu Nansheng Zhong Ningning zhang Zhenying li Wei State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China beijing institute of Economic Management Hebei 102602 China SINOPEC International Petroleum Exploration and Production Corporation Beijing 100083 China

In the hinterland of the Junggar Basin, there are multiple depressions with multiple sets of source rocks. Therefore, the conditions of hydrocarbon sources are complex, and the geochemical characteristics and sources of hydrocarbon vary in different structural belts. The evolution of the Che- Mo palaeohigh affected the formation of hydrocarbon source kitchens and hydrocarbon migration. We studied the combination and superimposition of hydrocarbon source kitchens, using as an example the hinterland of the Junggar Basin （including the Yongjin, Zhengshacun, Moxizhuang and Luliang uplift areas）. The study was based on geochemical analyses of crude oil and fluid inclusions, and the histories of tectonic evolution and hydrocarbon generation. The results indicated that before the Paleogene there were two hydrocarbon-generating depressions： the Western Well Penl depression and the Changji depression on the south and north sides of the Che-Mo palaeohigh, respectively. The Permian source kitchen had been generating hydrocarbon continuously since Triassic and reached high maturity stage in the Cretaceous period. After Paleogene, the adjustment of the Che-Mo palaeohigh led to the subsidence of the Changji depression and the Jurassic source rocks reached mature stage and became the main source kitchens. However, the Jurassic source rocks in the Western Well Penl depression were still in a low maturity stage and did not generate oil because of the adjustment of tectonic movements. As a result, in the central and southern parts of the Junggar Basin, Jurassic source rocks generated oil, but in the Luliang uplift, the crude oil was from the Permian source rocks in the Western Well Penl depression and the Jurassic source rocks did not contribute. The crude oil in the central Zhengshacun-Moxizhuang belt was from the Permian source rocks in two depressions, and partially from the Jurassic source rocks. The crude oil in the Luliang uplift was from the source rocks of the lower Permian F

关键词： Hinterland of the Junggar Basin hydrocarbon source kitchen oil source combination and superimposition accumulation stage

Detect early stage lung cancer by a LAMP microfluidic chip system with a real-time fluorescent filter processor

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Science china Chemistry 2012年第4期55卷 508-514页

作者： WANG TongZhou1, zhang Ye1, HUANG Guoliang1,2,3, WANG Can2, XIE Lan1, MA li2, li ZhiYong2, LUO XianBo2, TIAN Hao2, li Qiang1, li Xin1, LV ZhouYan1 & BAO XiaoFan11Department of Biomedical Engineering, School of Medicine, Tsinghua University, beijing 100084, china 2National Engineering Research Center for beijing Biochip Technology, beijing 102206, china 3Yangtze Delta Region institute of Tsinghua University, Hangzhou 330401, china 1. Department of Biomedical Engineering School of Medicine Tsinghua University Beijing 100084 China2. National Engineering Research Center for Beijing Biochip Technology Beijing 102206 China3. Yangtze Delta Region Institute of Tsinghua University Hangzhou 330401 China

This work presents a promising clinical molecular diagnostics for early stage lung cancer. This novel diagnostic method utilized the loopmediated isothermal amplification （LAMP）, micro fluidic chips and a confocal optical detector with a nonlinear fluorescent filter processor. An isothermal amplification based microfluidic chip for the early diagnostics of lung cancer was developed and a confocal optical detector was improved by a novel real-time fluorescent filter to sensitively monitor the DNA amplification procedure with high signal to noise ratio and fluorescence collecting ability. Experiment showed that a rapid diagnostic of lung cancer by detecting the existence of the CEA mRNA could be performed in only 5 laL of reaction assay in less than 45 min. While the traditional intube RTPCR set consumed more than 25 -μL of the assay and took more than 90 rain.

关键词： microfluidic chip – isothermal amplification – lung cancer – confocal detection – non linear filter

Spatio-temporal pattern analysis of single-trial EEG signals recorded during visual object recognition

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Science china(Information Sciences) 2011年第12期54卷 2519-2527页

作者： WANG ChangMing 1 , HU XiaoPing 3 , YAO li 1,2 , XIONG Shi 2 & zhang JiaCai 2 1 National Key Laboratory of Cognitive Neuroscience and Learning, beijing Normal University, beijing 100875, china 2 College of Information Science and Technology, beijing Normal University, beijing 100875, china 3 Biomedical Imaging Technology Center, Emory University/Georgia institute of Technology, Atlanta 30322, USA 1. National Key Laboratory of Cognitive Neuroscience and Learning Beijing Normal University Beijing 100875 China3. Biomedical Imaging Technology Center Emory University/Georgia Institute of Technology Atlanta 30322 USA2. College of Information Science and Technology Beijing Normal University Beijing 100875 China

Object discrimination is a fundamental cognitive function for human brains. In this study, we utilized an analysis approach for single-trial electroencephalography (EEG) to analyze the spatio-temporal activation patterns of visual objects processing in human brains, and attempted to apply it to discriminate different visual objects. The spatial patterns were respectively extracted from scalp EEG and the reconstructed cortical sources, while the experiment participants were perceiving 4 different categories of visual objects (faces, buildings, cats and cars). By classifying the patterns extracted from single-trial EEG, the presented visual objects could be discriminated by a computer, and the classification accuracies may provide a quantitative index to evaluate the spatial differences of the brain activations related to different visual objects. Our results demonstrated that the spatial patterns on both the scalp and the sources levels resulted in higher classification accuracies than chance rate. We also examined the classification results using temporally non-overlapping time intervals of different event-related potential (ERP) components. The temporal changes of classification accuracies may reflect the temporal distribution of the discriminative information in the EEG responses. The present pattern extraction and classification methods may compose a computational model for single-trial EEG data analysis in investigations of the spatio-temporal activation patterns for object recognition. These spatio-temporal patterns in EEG may be useful to identifying the discriminative spatial areas and time stages to improve the accuracies and efficiencies of object discrimination. In addition, investigating and utilizing humans'cognitive mechanisms of object recognition may improve computers' processing efficiency of visual information.

关键词： EEG spatio-temporal pattern object recognition single-trial analysis visual information processing

Investigation into the rotational bands of ^(185)Pt with the particle-rotor model

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Science china(Physics,Mechanics & Astronomy) 2011年第S1期54卷 114-118页

作者： li GuangShun1,2, ZHOU XiaoHong1,2, zhang ShuangQuan3, zhang YuHu1 & MENG Jie3 1 institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, china 2 Graduate University of Chinese Academy of Sciences, beijing 100049, china 3 School of Physics and SK Laboratory of Nuclear Physics & Technology, Peking University, beijing 100871, china 1. institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China 2. Graduate University of Chinese Academy of Sciences Beijing 100049 China 3. School of Physics and SK Laboratory of Nuclear Physics & Technology Peking University Beijing 100871 China

Theoretical calculations have been performed for the ν9/2+[624](i13/2) and ν7/2-[503](f7/2) bands of 185Pt in the framework of particle-rotor model. The band properties of signature splitting and configuration mixing have been analyzed. The level energy and signature splitting before the band crossing can be well interpreted by introducing triaxiality. The positive-parity yrast band is pro posed to be dominated by the ν9/2+[624](i13/2) component, while the negative-parity band shows strong mixing of ν7/2-[503](f7/2) and ν9/2-[505](h9/2) configurations.

关键词： High-spin states particle-rotor model signature splitting configuration mixing

Monaural voiced speech segregation based on elaborate harmonic grouping strategies

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Science china(Information Sciences) 2011年第12期54卷 2491-2500页

作者： liU WenJu 1 , zhang Xueliang 1 , JIANG Wei 1 , li Peng 2 & XU Bo 2 1 National Laboratory of Pattern Recognition, institute of Automation, Chinese Academy of Sciences, beijing 100190, china 2 Digital Media Content Technology Research Center, institute of Automation, Chinese Academy of Sciences, beijing 100190, china 1. National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing 100190 China2. Digital Media Content Technology Research Center Institute of Automation Chinese Academy of Sciences Beijing 100190 China

In this paper, an enhanced algorithm based on several elaborate harmonic grouping strategies for monaural voiced speech segregation is proposed. Main achievements of the proposed algorithm lie in three aspects. Firstly, the algorithm classifies the time-frequency (T-F) units into resolved and unresolved ones by carrier-to-envelope energy ratio, which leads to more accurate classification results than by cross-channel correlation. Secondly, resolved T-F units are grouped together according to minimum amplitude principle, which has been verified to exist in human perception, as well as the harmonic principle. Finally, "enhanced" envelope autocorrelation function is employed to detect amplitude modulation rates, which helps a lot in reducing half-frequency error in grouping of unresolved units. Systematic evaluation and comparison show that performance of separation is greatly improved by the proposed algorithm. Specifically, signal-to-noise ratio (SNR) is improved by 0.96 dB compared with that of previous method. Besides, our algorithm is also effective in improving the PESQ score and subjective perception score.

关键词： computational auditory scene analysis voiced speech separation harmonistic principle minimum amplitude principle elaborate harmonic grouping strategies

Prognostic value of calcium and phosphorus status in elderly heart disease patients with tricuspid regurgitation

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Chinese Medical Journal 2024年第5期137卷 613-615页

作者： Qingrong liu Kai Cao Ziang li Yunqing Ye Qian zhang Hongliang zhang Haiyan Xu Zhe li Yongjian Wu china-DVD Collaborators Department of Cardiology Beijing Aerospace General HospitalBeijing 100076China Department of Cardiology Fuwai HospitalNational Center for Cardiovascular DiseaseChinese Academy of Medical Science and Peking Union Medical CollegeBeijing 100037China Department of beijing institute of Ophthalmology Beijing Tongren HospitalCapital Medical UniversityBeijing 100000China 不详

To the Editor:Tricuspid regurgitation(TR)associated with valve disease is a general medical issue with growing prevalence and socioeconomic ***,especially moderate or severe TR,has been reported to be associated with an increased risk of heart failure and mortality.^([1])Studies have shown that blood calcium levels and blood phosphorus levels have a great influence on the human body,especially on the cardiovascular *** serum calcium levels were reported to be a risk factor for cardiovascular disease.^([2])A meta-analysis reported that moderate dietary calcium intake protects against cardiovascular and all-cause mortality and that calcium supplementation reduces mortality in women.^([3])

关键词： mortality regurgitation cardiovascular

Distinct actions of intermittent and sustained β-adrenoceptor stimulation on cardiac remodeling

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Science china(life Sciences) 2011年第6期54卷 493-501页

作者： MA XiaoWei1,3,SONG Yao1,3,CHEN Chao1,3,FU YongNan1,3,SHEN Qiang2,3,li ZiJian1,3 & zhang YouYi1,3 1institute of Vascular Medicine,Peking University Third Hospital,beijing 100191,china 2institute of Cardiovascular Science,Peking University,beijing 100191,china 3Key Laboratory of Molecular Cardiovascular Sciences,Ministry of Education,beijing 100191,china 1. institute of Vascular Medicine Peking University Third Hospital Beijing 100191 China3. Key Laboratory of Molecular Cardiovascular Sciences Ministry of Education Beijing 100191 China2. Institute of Cardiovascular Science Peking University Beijing 100191 China

Heart disease is associated with increased sympathetic nerve activity and elevated levels of circulating catecholamines,resulting in chronic stimulation of the β-adrenergic receptors (β-AR) and consequent pathological cardiac ***,chronic administration of the β-AR agonist isoproterenol (ISO) has been most commonly used to model β-AR-induced cardiac ***,it remains unclear whether β-AR-mediated cardiac remodeling and dysfunction differs between sustained versus pulsatile (intermittent) exposure to a β-***,we compare the effects of intermittent versus sustained administration of ISO on cardiac remodeling and function in *** were administered 5 mg (kg d)-1 ISO for 2 weeks either by daily subcutaneous injection,or continuous infusion via an implanted osmotic *** function and remodeling were determined by echocardiography,micromanometry and ***,Western blotting and quantitative real-time polymerase chain reaction (qRT-PCR) were utilized to define the proteins and genes *** sustained and intermittent administration of ISO resulted in a similar degree of cardiac hypertrophy (16% and 19%,respectively).However,mice receiving ISO by daily injection developed more severe ventricular systolic and diastolic dysfunction and myocardial fibrosis compared with mice receiving ISO via the osmotic *** disparity in results between the delivery methods is suggested to be due,at least in part,to increased expression of fibrogenic factors,including connective tissue growth factor (CTGF) and NADPH oxidase (NOX4),in mice receiving intermittent application of *** summary,compared with sustained exposure to a β-AR agonist,intermittent β-AR stimulation leads to more severe cardiac dysfunction and *** findings not only further our understanding of β-AR function in the setting of cardiac pathophysiology,but also highlight that significant differences can result dependent upon the mod

关键词： β-adrenoceptor reactive oxygen species NADPH oxidase cardiac hypertrophy cardiac fibrosis

Level Set interface treatment and its application in Euler method

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Science china(Physics,Mechanics & Astronomy) 2010年第2期53卷 227-236页

作者： WU KaiTeng1,2,HAO li3,WANG Cheng4 & zhang li1,2 1 Numerical Simulation Sichuan Higher School Key Laboratory,Neijiang Normal University,Neijiang 641112,china 2 College of Mathematics and Information Science,Neijiang Normal University,Neijiang 641112,china 3 College of Science,beijing University of Civil Engineering and Architecture,beijing 100044,china 4 State Key Laboratory of Explosion Science and Technology,beijing institute of Technology,beijing 100081,china 1. Numerical Simulation Sichuan Higher School Key Laboratory Neijiang Normal University Neijiang 641112 China2. College of Mathematics and Information Science Neijiang Normal University Neijiang 641112 China3. College of Science Beijing University of Civil Engineering and Architecture Beijing 100044 China4. State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

Level Set interface treatment method is introduced into Euler method,which is employed for interface treatment method for multi-materials. Combined with the ghost fluid method,the moving interface is tracked. Fifth-order WENO spatial discretization and third-order TVD Runge-Kutta time discretization methods are used. Shock-wave action on bubble,implosion and velocity field Shock effect bubbles; implosion and velocity field are simulated by means of LS-MMIC3D programmed by C++. Nu-merical results show that the Level Set interface treatment method is effective and feasible for multi-material interface treatment in comparison with the WENO method.

关键词： Euler method Level Set method shock-wave action on bubble implosion numerical simulation