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Environmental Effects of Foreign Trade and Its Spatial Variations in Mid-eastern Provinces and Cities of China

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Chinese Geographical Science 2012年第5期22卷 626-636页

作者： jin Xianfeng DONG Suocheng luo Lingjun LI Yu YUAN Chao shu Kesheng CHEN Jiaquan Southwest University Chongqing 401121 China Chongqing Geomatic Center Chongqing 401121 China Institute of Geo-graphic Sciences and Natural Resource Research Chinese Academy of Sciences Beijing 100101 China

The studies on environmental effects of foreign trade and its spatial variations are helpful to design and implement environmental protection *** order to eliminate the adverse effects of insufficient observation values on the accuracy of regression results and dynamic information quantity of fitting equation during empirical study,panel data of the mid-eastern provinces and cities of China from 1985 to 2007 were selected based on the adjustment of classical regression model in this *** unit root test and panel cointegration analysis method were applied to investigating the environmental effects of foreign trade and its spatial variations in the mid-eastern provinces and cities of China and its three groups divided by foreign trade *** results show that all scale effects are positive,while all technical effects are negative and unable to counteract positive scale *** trade development is regarded as an important cause for outstanding eco-environmental problems in the mid-eastern provinces and cities of *** effects and structural effects are significantly different among different groups because of spatial variations in environmental policies,export destinations,source of FDI,*** the principle of′coordinating generality and considering differences comprehensively′,it is essential to issue a series of policies and countermeasures corresponding to differences in regional environmental effect of foreign trade,in order to coordinate the relationship between foreign trade development and eco-environment in each region.

关键词： mid-eastern provinces and cities of China foreign trade environmental effect spatial variation cointegra-tion analysis

宫颈癌筛查妇女高危型人乳头瘤病毒感染现状及影响因素研究:基于成都市45万人群

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中国全科医学 2025年第2期28卷 213-219页

作者：舒婷兰志鹏巫霞罗映娟杨柳电子科技大学医学院附属妇女儿童医院·成都市妇女儿童中心医院保健部四川省成都市611731

背景宫颈癌是女性常见恶性肿瘤之一,其病因明确,通过规范筛查可以有效降低宫颈癌发病率。人乳头瘤病毒(HPV)检测是WHO推荐的首选宫颈癌筛查方法,了解成都市高危型人乳头瘤病毒(hrHPV)感染状况,对优化成都市宫颈癌筛查方案具有重要意义... 详细信息

背景宫颈癌是女性常见恶性肿瘤之一,其病因明确,通过规范筛查可以有效降低宫颈癌发病率。人乳头瘤病毒(HPV)检测是WHO推荐的首选宫颈癌筛查方法,了解成都市高危型人乳头瘤病毒(hrHPV)感染状况,对优化成都市宫颈癌筛查方案具有重要意义。目的分析成都市35~64岁参加宫颈癌筛查人群的hrHPV感染现状和宫颈病变患者的hrHPV亚型感染分布情况,探讨hrHPV阳性检出率的相关影响因素。方法从“成都市育龄妇女生殖健康数据库”收集2023年参加成都市免费宫颈癌筛查的459433例个案数据,分析不同hrHPV基因型感染总体分布情况以及宫颈病变患者的hrHPV亚型感染分布情况,比较不同特征人群hrHPV感染情况,并构建多水平Logistic回归模型分析hrHPV检出阳性情况的相关因素。结果459433例中,hrHPV阳性检出率为11.65%(53509/459433),hrHPV感染随年龄的增长呈上升趋势(χ_(趋势)^(2)=1501.082,P<0.001)。82.39%(131/159)的宫颈癌患者感染HPV 16或18亚型,以单纯感染HPV 16亚型为主(52.20%,83/159)。多水平Logistic回归分析结果显示,年龄、文化程度、婚姻状况、绝经状态、避孕方式、妊娠次数、分娩次数为hrHPV阳性检出情况的影响因素(P<0.05)。结论成都市女性hrHPV阳性检出率略低于全国平均水平。在筛查过程中,要重视健康教育与随访工作,特别是对HPV 16或18亚型阳性者的后续随访工作。开展宫颈癌筛查宣传工作时应特别关注年长者、文化程度较低者、未婚或离异/丧偶者、已绝经者、未避孕或采用避孕套外的其他避孕方式者、妊娠或分娩2次以上者等重点人群,加强宫颈癌防治核心知识、生殖健康知识等的宣传,提高妇女健康素养。

关键词：宫颈癌乳头状瘤病毒感染高危型人乳头瘤病毒筛查影响因素分析

Advanced experimental methods toward understanding biophysicochemical interactions of interfacial biomolecules by using sum frequency generation vibrational spectroscopy

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Science China Chemistry 2014年第12期57卷 1646-1661页

作者： YE shu Ji luo Yi Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics University of Science and Technology of China Synergetic Innovation Center of Quantum Information & Quantum Physics University of Science and Technology of China

Sum frequency generation vibrational spectroscopy(SFG-VS)has been demonstrated to be a powerful technique to study the interfacial structures and interactions of biomolecules at the molecular *** most previous studies mainly collected the SFG spectra in the frequency range of 1500–4000 cm-1,which is not always sufficient to describe the detailed interactions at surface and *** knowledge of the complex biophysicochemical interactions between biomolecules and surface requires new ideas and advanced experimental methods for collecting SFG vibrational *** introduced some advanced methods recently exploited by our group and others,including(1)detection of vibration modes in the fingerprint region;(2)combination of chiral and achiral polarization measurements;(3)SFG coupled with surface plasmon polaritons(SPPs);(4)imaging and microscopy approaches;and(5)ultrafast time-resolved SFG *** technique that we integrated with these advanced methods may help to give a detailed and high-spatial-resolution 3D picture of interfacial biomolecules.

关键词： protein cholesterol 3D interfacial structures fingerprint region amide III chiral polarization surface plasmon polaritons time-resolved

Properties of PEG/thermally modified wood flour/polypropylene (PP) composites

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Forestry Studies in China 2012年第4期14卷 307-314页

作者： luo shu-pin CAO jin-zhen WANG Xing College of Materials Science and Technology Beijing Forestry University

In order to improve the dimensional stability of wood-polymer composites, wood flour pre-treated by polyethylene glycol （PEG） at two different concentrations and then thermally treated at 140℃, was used as raw material to produce wood flour/poly- propylene （PP） composites at a wood content of 40%. The structure of modified wood flour was analyzed with a scanning electron microscope （SEM） and its effect on the physical and mechanical properties of wood flour/PP composites was evaluated. The SEM results indicated the ＂bulking＂ effect of PEG on wood flour, which resulted in reduced water uptake. The combination of PEG and heat treatment further improved the moisture resistance of the composites. However, PEG modification had a negative effect on the flexural modulus of rupture （MOR） and the modulus of elasticity （MOE）; whereas heat treatment partly compensated for this reduc- tion. For dynamic mechanical properties, PEG treatment decreased the storage modulus （E＇）. However, the heat treatment resulted in an increase orE＇ of the wood flour/PP composites, with the temperature of loss factor peaks shifting to a higher temperature.

关键词： wood flour polypropylene (PP) polyethylene glycol (PEG) heat treatment

Controlling Beam Halo-Chaos

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Chinese Physics Letters 2001年第12期18卷 1554-1557页

作者： FANG jin-Qing luo Xiao-shu CHEN Guan-Rong WENG Jia-Qiang China Institute of Atomic Energy P.O.Box 275-27Beijing 102413 Department of Physics and Electronic Science Guangxi Normal UniversityGuilin 541004 Department of Electronic Engineering City University of Hong KongHong Kong

Beam halo-chaos is essentially a complex spatiotemporal chaotic motion in a periodic-focusing channel of a highpower linear proton accelerator. The controllability condition for beam halo-chaos is analysed qualitatively. A special nonlinear control method, i.e. the wavelet-based function feedback, is proposed for controlling beam halochaos. Particle-in-cell simulations are used to explore the nature of halo-chaos formation, which has shown that the beam hMo-chaos is suppressed effectively after using nonlinear control for the proton beam with an initial full Gaussian distribution. The halo intensity factor Hav is reduced from 14%o to zero, and the other statistical physical quantities of beam halo-chaos are more than doubly reduced. The potential applications of such nonlinear control in experiments are briefly pointed out.

关键词： beam chaos nonlinear

Indian monsoon drove the dispersal of the thoracica group of Scytodes spitting spiders

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Zoological Research 2024年第1期45卷 152-159页

作者： Yu-Fa luo shu-Qiang Li School of Life and Environmental Sciences Shaoxing UniversityShaoxingZhejiang 312000China Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar

We examined the global biogeography of the Scytodes thoracica group of spitting spiders based on 23 years of sampling at the species level(61 species in the thoracica group and 84 species of Scytodes)using DNA data from six *** results indicated that the thoracica group initially dispersed from Southeast Asia to East Africa between 46.5 and 33.0 million years ago,and dispersal events intensified between Southeast/South Asia and East/South Africa from the early to late *** timing of these events indicates that Asian-African faunal exchange of the thoracica group was driven by the Indian monsoon,and the pattern of dispersal suggests that colonialization took root when the Indian monsoon shifted from a North-South direction to an East-West direction from the middle Eocene.

关键词： Geological event Climate change Ballooning organism Faunal exchange Species distribution

Effect of reactive surface area of minerals on mineralization trapping of CO_2 in saline aquifers

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Petroleum Science 2012年第3期9卷 400-407页

作者： luo shu XU Ruina JIANG Peixue Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Beijing Key Laboratory of CO_(2) Utilization and Reduction TechnologyDepartment of Thermal EngineeringTsinghua UniversityBeijing 100084China

The reactive surface area, an important parameter controlling mineral reactions, affects the amount of mineralization trapping of CO2 which affects the long-term CO2 storage. The effect of the reactive surface area on the mineralization trapping of CO2 was numerically simulated for CO2 storage in saline aquifers. Three kinds of minerals, including anorthite, calcite and kaolinite, are involved in the mineral reactions. This paper models the relationship between the specific surface area and the grain diameter of anorthite based on experimental data from literature （Brantley and Mellott, 2000）. When the reactive surface areas of anorthite and calcite decrease from 838 to 83.8 m^2/m^3, the percentage of mineralization trapping of CO： after 500 years decreases from 11.8% to 0.65%. The amount of dissolved anorthite and the amounts of precipitated kaolinite and calcite decrease significantly when the reactive surface areas ofanorthite and calcite decrease from 838 to 83.8 m2/m3. Calcite is initially dissolved in the brine and then precipitates during the geochemical reactions between CO2-H20 and the minerals. Different reactive surface areas of anorthite and calcite lead to different times from dissolution to precipitation. The pH of the brine decreases with decreasing reactive surface areas of anorthite and calcite which influences the acidity of the saline aquifer. The gas saturation between the upper and lower parts of the saline aquifer increases with decreasing reactive surface areas of anorthite and calcite. The mass density distribution of brine solution shows that the CO2^＋brine solution region increases with decreasing reactive surface areas ofanorthite and calcite.

关键词： Reactive surface area, mineralization trapping, dissolution precipitation, brine mass density,CO2 geological storage

Optimal and suboptimal structured algorithms of binary linear block codes

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Journal of Systems Engineering and Electronics 2011年第6期22卷 1010-1014页

作者： Yijun luo jin Li School of Electronic Information Wuhan University Wuhan 430079 R R. China

The optimal and suboptimal structured algorithms of linear block codes from the geometrical perspective are *** minimum distance and weight property lemmas and the theorem are proved for the generator *** upon the property of generator matrix,the structured algorithms of linear block codes are *** the complexity of optimal structured algorithm is very high,the binary linear block codes is searched by using the suboptimal structured *** comparison with Bose-Chaudhuri-Hocquenqhem（BCH） codes shows that the searched linear block codes are equivalent on minimum distance and can be designed for more block *** the linear block codes are used widely in communication systems and digital applications,the optimal and suboptimal structured algorithms must have great future being widely used in many applications and perspectives.

关键词： channel coding linear block codes generator matrix minimum distance.

Control of Beam Halo-Chaos by Fraction Power-Law Function in Hackle Periodic-Focusing Channel

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Communications in Theoretical Physics 2008年第12期50卷 1365-1368页

作者： YU Hai-Jun BAI Long WENG Jia-Qiang luo Xiao-shu FANG jin-Qing Department of Physics Huainan Normal University Huainan 232001 China College of Science China Unversity of Mining and Technology Xuzhou 221008 China College of Physics and Information Technology Guangxi Normal University Guilin 541004 China China Institute of Atomic Energy Beijing 102413 China

The Kapchinsky Vladimirsky(K-V)beam through a hackle periodic-focusing magnetic field is studiedusing the particle-core *** beam halo-chaos is found,and an idea of fraction power-law function controller isproposed based on the mechanism of halo formation and the strategy of controlling *** method is appliedto the multi-particle simulation to control the *** numerical results show that the halo-chaos and its regenerationcan be eliminated effectively by using the fraction power-law function control *** the same time,the radialparticle density is uniform at the beam's center as long as the control method and appropriate parameter are chosen.

关键词： beam halo-chaos hackle periodic-focusing magnetic field fraction power-law function