文物旅游地/遗产旅游地社区居民权利保障研究综述

在对文物旅游地/遗产旅游地社区居民感知研究、社区居民与相关利益者关系研究、社区居民参与度与参与模式研究的相关成果的梳理和分析的基础上,描述社区居民权利在经济、政治以及社会文化等方面面临的保障与缺失问题。研究认为:社区居民参与旅游活动普遍呈现为一种单向过程和边缘境地,社区居民在本质上处于"非权利"、"被决定"和"被表达"状态,这些现状对文物旅游地/遗产旅游地的持续发展造成严重影响。因此,对社区居民权利保障机制、保障形式的多学科交叉研究成为当前不容忽视的课题。     

第二代天体测量卫星及后依巴谷地面天体测量的进展

简述了后依巴谷的天体测量工作。首先给出了第二个天体测量卫星Gaia的最新进展、最近提出的JAMSE和OBSS计划的简介,以及包含天体测量内容的SIM PlanetQuest计划的情况; 叙述了多波段天体参考架的建立和维持,特别是依巴谷星表向暗星方向的扩充和数字巡天,以及其他地面观测计划,如双星和聚星、太阳系天体的观测等;介绍了天体测量与天体物理结合的几个研究课题的进展;最后对我国自然科学基金会“十一五”天体测量优先发展的方向与内容提出建议。     

A Study on the Meat and Bone Meal and Poultry By-product Meal as Protein Substitutes of Fish Meal in Practical Diets for Litopenaeus vannamei Juveniles

1　Introduction　Proteinisanimportantnutritionalingredientofaquaticfeed .Thehighproteinneedsoffish ,shrimpandmostotheraquaticanimalsissuppliedmainlybyfishmeal (WilliamsandBarlow ,1996 ) .Recently ,thefishmeal,asamainproteinsourceofaquaticfeedisshort suppliedintheinternationalmarketanditspriceisbecominghigherandhigher .Therefore ,itisnecessarytofindsubstitutesoffishmealasaproteinsourceofaquaticfeed .　Someotheranimalby productmealssuchasmeatandbonemeal (MBM )andpoultryby productmeal(PBM )ha…     

GIS数据用于CorelDRAW地图制图方法的研究

探讨利用GIS数据在通用平面设计软件CorelDRAW中进行地图制图的方法,提出利用GIS数据在CorelDRAW环境下进行地图制图的技术路线,为CorelDRAW地图制图用户提供参考。     

Rules and Methods of UAV Activities’ Aerial Lanes Design for (Ultra) Low Airspace in Regional Areas

The exploitation of (ultra) low airspace resource has become an important component of optimizing the utilization of airspace and has received worldwide attention. It is the major form for UAV activity, which reveals great socioeconomic prospects. Firstly, the background of exploiting (ultra) low airspace resource and challenge for UAV activities were analyzed in regional areas. Then, legal rights for UAV activities and routes design in overseas and domestic research were reviewed. Second, the forms of regional rules for UAV activities in (ultra) low airspace were summarized, which included height-density rule, coverage area rule and isolation area of rule. Third, based on the air network of UAV(s) and aiming at the demand of aerial lanes for different requirements, the development from the method of 3D city model to the Cost-to-go was prospected. The findings are as follows: UAV activities’ aerial lanes design includes high-density as general rules and coverage area rule, isolation area rule as special rules. On the basis of 3D city model, improved method of Cost-to-go is applied to the choice of the optimal aerial lanes; based on ground buildings and residents’ actual conditions in regional area, the rules and methods are good for the (ultra) low airspace resources development and better solve the problem of UAV activities coordination. Furthermore, the rules and methods play an important role even in the implementation of the national airspace system.     

Direct Radiative Effect of Aerosols on Net Ecosystem Carbon Exchange in the Pearl River Delta Region

The environmental impact of aerosols is currently a hot issue that has received worldwide attention. Lacking simultaneous observations of aerosols and carbon flux, the understanding of the aerosol radiative effect of urban agglomeration on the net ecosystem carbon exchange(NEE) is restricted. In 2009-2010, an observation of the aerosol optical property and CO_2 flux was carried out at the Dongguan Meteorological Bureau Station(DMBS) using a sun photometer and eddy covariance systems. The different components of photosynthetically active radiation(PAR),including global PAR(GPAR), direct PAR(DPAR), and scattered PAR(FPAR), were calculated using the Santa Barbara DISORT Atmospheric Radiative Transfer(SBDART) model. The effects of PAR on the NEE between land-atmosphere systems were investigated. The results demonstrated that during the study period the aerosol optical depth(AOD)reduced the DPAR by 519.28±232.89 μmol photons · m~(-2)s~(-1);, but increased the FPAR by 324.93±169.85μmol photons ·m~(-2)s~(-1);, ultimately leading to 194.34±92.62 μmol photons · m~(-2)s~(-1); decrease in the GPAR. All the PARs(including GPAR,DPAR, and FPAR) resulted in increases in the NEE(improved carbon absorption), but the FPAR has the strongest effect with the light use efficiency(LUE) being 1.12 times the values for the DPAR. The absorption of DPAR by the vegetation exhibited photo-inhibition in the radiation intensity 600 photons · m~(-2)s~(-1); in contrast, the absorptions of FPAR did not exhibit apparent photo-inhibition. Compared with the FPAR caused by aerosols, the DPAR was not the primary factor affecting the NEE. On the contrary, the increase in AOD significantly increased the FPAR, enhancing the LUE of vegetation ecosystems and finally promoting the photosynthetic CO_2 absorption.     

Salinity effect on the liquid limit of soils

Acta Geotechnica - Previous studies stated that, with increasing salinity, the decreased liquid limit for expansive soils was attributed to the shrinkage of diffuse double layer, while the...     

Rotation curve of the Galactic outer disk derived from radial velocities and UCAC3 proper motions of carbon stars

The availability of astrometric data and radial velocities of carbon stars near the Galactic plane enables us to investigate the kinematics of the Milky Way,especially the rotation curve.The recently published Third U.S.Naval Observatory CCD Astrograph Catalog (UCAC3) provides the opportunity to test this problem using three-dimensional velocity in order to obtain more reliable rotation curves.We intend to study the Galactic rotation curve up to 15 kpc using the radial velocities and proper motions of carbon stars.The motivation for using UCAC3 is to provide high precision proper motions which have hardly been used in determining the rotation velocity of tracers.Seventy-four carbon stars and carbon-rich Mira variables toward the anti-center direction (90°＜(e)＜ 270°,|b| ＜ 6°) are picked up from the literature then matched with UCAC3 carbon star candidates to obtain their proper motions.A rigorous geometrical method is employed to compute the rotation velocity of each object.Taking carbon stars as tracers,we find a fiat rotation curve of 210 ± 12kms-1assuming/to = 8.0 kpc for the gaiactocentric distance and V0 = 220 km s-1 for the rotation velocity of the Sun.Due to the uncertainties of distances,the rotation velocities are more dispersed if tangential velocities enter the calculation,compared to those derived from radial velocities only.However,the whole rotation curve shows coherence with previous results.Increasing observation and study of carbon stars would be desirable in order to provide more homogeneous data for the kinematical study of the Galactic disk.     

洞穴化学沉积物的古气候记录与古生态环境意义

洞穴化学沉积物由于其特有的微层结构及其内的稳定氧、碳同位素和微量元素所蕴含的古气候与古生态环境信息 ,并且具有分布广、时间长、信息保存完整等特点 ,因此 ,它是研究地球环境变化极好的自然环境历史档案。几十年来 ,国内外这一领域的研究工作有了长足的发展 ,并已经取得了很大的成就 ,本文分别从氧同位素对气候变化的反映、碳同位素应用于重建地表植被生态环境以及石笋微层和微量元素的高分辨率气候环境指示意义几个方面对此作了较为综合的论述 ,同时 ,对这一领域现今所存在的问题及未来的发展趋势 ,也提出了一些自己的看法。