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Effect of Body Mass Index on All-cause Mortality and Incidence of Cardiovascular Diseases─Report for Meta-Analysis of Prospective Studies on Optimal Cut-off Points of Body Mass Index in Chinese Adults

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Biomedical and Environmental Sciences 2002年第3期15卷 245-252页

作者： zhou BEI-fan Cooperative Meta-Analysis Group of the Working Group on Obesity in China

Objective To verify the optimal cut-off points for overweight and obesity in Chinese adults based on the relationship of baseline body mass index (BMI) to all-cause mortality, and incidence of cardiovascular diseases from pooled data of Chinese cohorts. Methods The prospective study data of existing cohort studies in China were collected, and the age-adjusted all-cause mortality stratified by BMI were estimated. The similar analysis was repeated after excluding deaths within the first three years of follow-up and after excluding smokers. The incidence of age-adjusted coronary heart disease (CHD) and stroke stratified by BMI were also analyzed. Multiple Cox regression coefficients of BMI for the incidence of CHD and stroke after controlling other risk factors were pooled utilizing the methods of weighting by inverse of variance to reveal whether BMI had independent effect and its strength on the incidence of CHD and stroke. Results The data of 4 cohorts including 76 227 persons, with 745 346 person-years of follow-up were collected and analyzed. The age-adjusted all-cause mortality stratified by BMI showed a U-shaped curve, even after excluding deaths within the first three years of follow-up and excluding smokers. Age-adjusted all-cause mortality increased when BMI was lower than 18.5 and higher than 28. The incidence of CHD and stroke, especially ishemic stroke increased with increasing BMI, this was consistent with parallel increasing of risk factors. Cox regression analysis showed that BMI was an independent risk factor for both CHD and stroke. Each amount of 2 kg/m2 increase in baseline BMI might cause 15.4%, 6.1% and 18.8 % increase in relative risk of CHD, total stroke and ischemic stroke. Reduction of BMI to under 24 might prevent the incidence of CHD by 11% and that of stroke by 15 % for men, and 22 % of both diseases for women. Conclusion BMI ≤18.5, 24-27.9 and ≥28 (kg/m2) is the appropriate cut-off points for underweight, overweight and obesity in C

关键词： Body mass index (BMI) All-cause mortality Coronary heart disease Stroke

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Multicolor photometric study of M31 globular clusters

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Research in Astronomy and Astrophysics 2009年第9期9卷 993-1010页

作者： zhou fan Jun Ma Xu zhou National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

We present the photometry of 30 globular clusters （GCs） and GC candidates in 15 intermediate-band filters covering the wavelength region from - 3000 to 10000A using the archival CCD images of M31 observed as part of the Beijing - Arizona - Taiwan - Connecticut （BATC） Multicolor Sky Survey. We transform these intermediate-band photometric data into the photometry in the standard U BV RI broadbands. These M31 GC candidates are selected from the Revised Bologna Catalog （RBC V.3.5）, and most of these candidates do not have any photometric data. Therefore, the presented photometric data are a supplement to the RBC V.3.5. We find that 4 out of 61 GCs and GC candidates in RBC V.3.5 do not show any signal on the BATC images at their locations. By applying a linear fit of the distribution in the color-magnitude diagram of blue GCs and GC candidates using data from the RBC V.3.5, in this study, we find the ＂blue-tilt＂ of blue M31 GCs with a high confidence at 99.95% or 3.47cr for the confirmed GCs, and 〉 99.99% or 4.87e for GCs and GC candidates.

关键词： galaxies: individual (M31) - galaxies: star clusters - galaxies: evolution

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Anisotropic monolayer of ReX_(2)on Au foils for exploring abnormal growth behavior and electronic properties

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Nano Research 2023年第3期16卷 4197-4210页

作者： Wenzhi Quan Shuangyuan Pan fan zhou Yanfeng Zhang Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China School of Materials Science and Engineering Peking UniversityBeijing 100871China

As an emerging class of semiconducting transition metal dichalcogenides(TMDCs),two-dimensional(2D)rhenium dichalcogenides(ReX_(2),X=S or Se)have recently aroused great research interest due to their unique anisotropic structure(1T′phase),and the related novel properties and ***,many efforts have been devoted to the controllable syntheses of high-quality monolayer or few-layer ReX_(2)flakes/films by chemical vapor deposition(CVD),wherein the metallic Au foil is found to be a unique substrate,due to the relatively strong interfacial coupling between monolayer ReX_(2)and *** the conductive nature of Au enables in situ characterizations of the as-grown ReX_(2)samples,which is essential for exploring the fundamental properties and internal growth ***,this review focuses on the recent progresses on the CVD syntheses and in situ characterizations of high-quality monolayer ReX_(2)flakes/films and their heterostructures with graphene on Au *** effects of Au foils on improving the crystal quality and inducing the growth of monolayer ReX_(2)single crystals are intensively *** crystallinity,domain morphology,atomic and electronic structures,as well as the growth behaviors of monolayer ReX_(2)flakes/films and graphene/ReX_(2)heterostructures on Au revealed by in situ characterization techniques are also *** contrasts,the growth behaviors of monolayer or few-layer ReX_(2)on insulating substrates are also ***,the potential applications of 2D ReX_(2)in new-generation electronic,optoelectronic devices,and energy-related fields are also ***,future research directions are also prospected for propelling the practical applications of 2D ReX_(2)materials in more versatile fields.

关键词： rhenium dichalcogenides(ReX_(2)) Au chemical vapor deposition scanning tunneling microscopy/spectroscopy growth behavior electronic properties

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Uniform Exponential Attractor for Nonautonomous Partly Dissipative Lattice Dynamical System

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Acta Mathematica Sinica,English Series 2014年第8期30卷 1381-1394页

作者： Sheng fan zhou Jia Jia LOU Department of Mathematics Zhejiang Normal University Zhengzhou 63 Middle School

In this paper,we consider the existence of a uniform exponential attractor for the nonautonomous partly dissipative lattice dynamical system with quasiperiodic external forces.

关键词： Nonautonomous partly dissipative lattice systems uniform exponential attractor continuous process

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Uniform Exponential Attractors for Second Order Non-autonomous Lattice Dynamical Systems

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Acta Mathematicae Applicatae Sinica 2017年第3期33卷 587-606页

作者： Xiao-peng zhou Fu-qi YIN Sheng-fan zhou School of Mathematics and Computational Science Xiangtan University Department of Mathematics Zhejiang Normal University

In this paper, the existence of a uniform exponential attractor for a second order non-autonomous lattice dynamical system with quasiperiodic symbols acting on a closed bounded set is considered. Firstly, the existence and uniqueness of solutions for the considered systems which generate a family of continuous processes is shown, and the existence of a uniform bounded absorbing sets for the processes is proved. Secondly, a semigroup defined on a extended space is introduced, and the Lipschitz continuity, a-contraction and squeezing property of this semigroup are proved. Finally, the existence of a uniform exponential attractor for the family of processes associated with the studied lattice dynamical systems is obtained.

关键词： uniform exponential attractor quasiperiodic symbols a family of processes squeezing property lattice dynamical systems

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High efficient moving object extraction and classification in traffic video surveillance

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Journal of Systems Engineering and Electronics 2009年第4期20卷 858-868页

作者： Li Zhihua zhou fan Tian Xiang Chen Yaowu Inst. of Advanced Digital Technology and Instrument Zhejiang Univ. Hangzhou 310027 P. R. China

Moving object extraction and classification are important problems in automated video surveillance systems. A background model based on region segmentation is proposed. An adaptive single Gaussian background model is used in the stable region with gradual changes, and a nonparametric model is used in the variable region with jumping changes. A generalized agglomerative scheme is used to merge the pixels in the variable region and fill in the small interspaces. A two-threshold sequential algorithmic scheme is used to group the background samples of the variable region into distinct Gaussian distributions to accelerate the kernel density computation speed of the nonparametric model. In the feature-based object classification phase, the surveillance scene is first partitioned according to the road boundaries of different traffic directions and then re-segmented according to their scene localities. The method improves the discriminability of the features in each partition. AdaBoost method is applied to evaluate the relative importance of the features in each partition respectively and distinguish whether an object is a vehicle, a single human, a human group, or a bike. Experimental results show that the proposed method achieves higher performance in comparison with the existing method.

关键词： background model nonparametric model adaptive single Gaussian model object classification

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Effects of glossy privet fruit on neural cell apoptosis in the cortical parietal lobe and hippocampal CA1 region of vascular dementia rats

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Neural Regeneration Research 2008年第11期3卷 1192-1196页

作者： Jing Cai fan zhou Jian DU Academy of Integrative Medicine Fujian University of Traditional Chinese Medicine Fuzhou 350003 Fujian Province China Fujian Institute of Traditional Chinese Medicine Fuzhou 350003 Fujian Province China

BACKGROUND： Glossy privet fruit inhibits neural cell apoptosis following the onset of vascular dementia. OBJECTIVE： To confirm glossy privet fruit effects on neural cell apoptosis in the cortical parietal lobe and hippocampal CAI region of rat models of vascular dementia using molecular biology techniques. DESIGN, TIME AND SETTING： The neural cell morphology experiment was performed at the Laboratory of Flow Cells and Biochemistry, Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, and the Basic Room of Pathology, Academy of Chinese Medicine from December 2006 to May 2008. MATERIALS： A total of 60 Wistar rats were used to establish vascular dementia models using a photochemical reaction method. Glossy privet fruit was purchased from Fujian, China. Hydergine was co-produced by Sandoz, Switzerland and Huajin, China. METHODS： The 60 Wistar rats were randomly divided into 6 equal sized groups （n = 10）, i.e. model, blank, high, moderate and low doses of Chinese medicine, and hydergine control groups. Rats in the model group were treated with distilled water （1 mL/100 g） by gavage following model establishment. Rats in the blank group underwent experimental procedures as for the model group, except that rat models were created without illumination. Rats in the high, moderate and low doses of Chinese medicine groups, and the hydergine control group respectively received high, moderate and low doses of glossy privet fruit, and hydergine suspension （1 mL/100 g） by gavage, once a day, for 30 days. MAIN OUTCOME MEASURES： Morphology of neural cells from the rat cortical parietal lobe and hippocampal CA1 region of all groups was observed with an electron microscope. Positive neural cells in the injury site of the rat cortical parietal lobe and hippocampal CA1 region were investigated using the Fas immunohistochemieal method. Absorbance of Fas-positive neurons was detected by the MPIAS-500 multimedia color imaging analysis system. RESULTS： Neural

关键词： glossy privet fruit cell apoptosis vascular dementia

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Study on Direct Reduction Characteristics of Iron Ore Coal Mixed Pellets

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Journal of Iron and Steel Research International 2000年第2期7卷 6-10页

作者： XUE Zheng-Hang YOU Jin-zhou zhou Guo-fan Central Iron&Steel Research Institute University of Science and Technology Wuhan

In order to get DRI iron ore coal mixed pellets are reduced isothermally. The mechanisms of reduction desulphurization, iron oxide reduction and the structure regenesis of the coal mixed pellets during reduction have been studied. The effect of various processing factors on the quality of DRI and economy technological indices including compression strength, desulphurization rate, recovery rate, reaction fraction, carbon content and metallization are also researched.

关键词： iron ore coal mixed pellet DRI reduction desulphurization

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Adaptive Noise Identification in Vision-assisted Motion Estimation for Unmanned Aerial Vehicles

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International Journal of Automation and computing 2015年第4期12卷 413-420页

作者： fan zhou Wei Zheng Zeng-Fu Wang Department of Automation University of Science and Technology of China Institute of Intelligent Machines Chinese Academy of Sciences

Vision localization methods have been widely used in the motion estimation of unmanned aerial vehicles(UAVs).The noise of the vision location result is usually modeled as a white Gaussian noise so that this location result could be utilized as the observation vector in the Kalman filter to estimate the motion of the *** the noise of the vision location result is affected by external environment,the variance of the noise is ***,in previous researches,the variance is usually set as a fixed empirical value,which will lower the accuracy of the motion *** main contribution of this paper is that we proposed a novel adaptive noise variance identification(ANVI) method,which utilizes the special kinematic properties of the UAV for frequency analysis and then adaptively identifies the variance of the *** adaptively identified variance is used in the Kalman filter for more accurate motion *** performance of the proposed method is assessed by simulations and field experiments on a quadrotor *** results illustrate the effectiveness of the method.

关键词： Adaptive noise variance identification vision location motion estimation Kalman filter unmanned aerial vehicle.

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The catalytic effect of the Na and Ca-rich industrial wastes on the thermal ignition of coal combustion

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2467-2471页

作者： Jun Cheng fan zhou Xiaoxu Xuan Jianzhong Liu Junhu zhou Kefa Cen State Key Lab of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

The catalytic effects of four industrial wastes,namely,the soap residue(SR),brine sludge(BS),calcium carbide residue(CCR),and white lime mud(WLM),on coal thermal ignition were *** acidity of palmitate anion associated with Na+in SR was lower than that of chloride anion combined with Na+in BS,which resulted in an improved the combustion of *** acidity of OH-anion combined with Ca2+in CCR was lower than that of CO32-anion combined with Ca2+in WLM,resulting in CCR exhibiting a better catalytic effect on coal *** alkaline metal Na had lower initial ionisation energy than the alkaline earth metal ***,the Na-rich SR exhibited higher catalytic activity on coal ignition than Ca-rich *** ignition temperature of coal with 0.5%SR decreased from 544 to 503°C.

关键词： Industrial waste Catalysis Coal combustion Thermal ignition

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