大珠母贝人工苗育成研究

采用剥落、不剥落、特制附着基 3种育成方式对大珠母贝人工苗进行了研究。结果表明 :在雷州白蝶贝自然保护区 ,用海底沉笼方法对大珠母贝人工苗育成 ,2 10d后壳高达 (5 3.4 0± 0 .5 8)mm时成活率为 76 .5 %。在海南黎安港 ,用 3种不同的育成方式进行对比试验 ,其中 2 0 0 2年特制附着基组 ,成活率明显高于剥落苗组和不剥落苗组 ,180d后在壳高达 (5 8.2 0± 0 .6 3)mm时成活率为70 1% ,批量生产出壳高 5 0mm以上的大珠母贝 11.2× 10 4 个 ,为大珠母贝苗育成开辟了新途径。     

WCDMA直放站的应用分析

对WCDMA直放站的原理、主要技术指标、覆盖半径计算及其对系统的干扰进行分析和阐述，并就如何最大限度发挥直放站作用进行了必要的工程和理论探讨，同时结合工程实际情况提出了相应的解决方案。     

遥感信源色彩信号的提取与复现

提出遥感信源色彩信号的提取及复现理论,给出了可操作的技术路线,设计了提取与复现程序,用MODIS(中等分辨率航天成像光谱仪)数据提取并复现了色彩信号,生成了色彩信号图像。未进行大气校正的色彩信号图像等效于太空对地摄影,从图像可看出,地物被笼罩在瑞利散射形成的蓝色“云雾”下。经瑞利散射纠正后的色彩信号图像接近于地面真彩色摄影,非专业人员能根据地物颜色及阴影判读出常见地物。理论可用于遥感信源地面真彩色图像重建、色彩信号不完整信源彩色仿真、航天对地真彩色摄影、信源质量评价。     

基于空间统计分析与GIS的人均GDP空间分布模式研究

本文将空间统计分析与G IS相结合,探讨我国地级及以上城市人均GDP在空间分布上的特征。研究表明,我国地级及以上城市人均GDP在整体上呈现显著的空间集聚性,而在东、中、西部三个区域呈现不同的空间关联模式。     

利用高光谱遥感影像纹理滤波的城市居民地识别

高光谱影像具有丰富的光谱和空间结构信息,传统的基于光谱特征的分割方法易使分割区域过于细碎,从而降低了居民地信息提取的精度。尝试将纹理信息引入到特征空间,以提高信息识别、提取的精度。纹理信息采用多尺度3D-Gabor滤波器对经过特征选择后的高光谱影像进行滤波,进一步计算纹理能量和纹理特征,然后利用多特征聚类实现图像的初步分割,最终通过形态学方法获取影像中的居民地信息。实验表明,基于3D-Gabor滤波的方法能有效地识别、提取高光谱影像中的居民地信息。     

世博观光旅游线路组织模式研究

从旅游线路组织模式的研究角度,重点分析世博旅游线路组织模式与规律,有助于对旅游地进行客源市场定位和产品开发。基于旅游社国内世博旅游线路报价单,统计并分析大小华东区域旅游线路组织模式的类型、特征,以及旅游线路中旅游目的地的组合规律。结果表明:单目的地模式和完全环游模式是大小华东地区最重要的两种旅游线路模式;上海世博+古镇园林为主题的旅游路线最受世博游客欢迎;世博游客大都选择在小华东区域内进行游览;大小华东地区各目的地在旅游线路中出现频次存在较大的差异,整体上以上海、杭州、南京、苏州作为门户型和离境型旅游目的地。     

Restructuring the export-oriented industrialization in the Pearl River Delta, China: Institutional evolution and emerging tension

The rise of the Pearl River Delta (PRD) as a promising workshop of the “world factory” in China has attributed to the export-oriented industrialization driven by foreign direct investment, particularly Overseas Chinese investment from Hong Kong and Taiwan initiated in the late 1970s. The export-oriented industrialization has embedded in the flexible institutions favourable for foreign investors and local authorities, via the salient entry mode, i.e. processing with supplied materials (lailiaojiagong). Since the mid-2000s, the export-oriented industrialization has undergone dramatic restructuring to cope with the changing business environment at global, national and regional and firm levels. Drawing upon the evolutionary and institutional perspectives in geographical political economy approach, this study argues that the prevailed institutions conducive for the export-oriented processing have evolved into institutional inertia and territorial embeddedness as obstacles for the on-going restructuring, particularly the market reorientation from export to domestic sale. Moreover, difficulties of restructuring through the state-designated relocation have been heightened by the resistance from below and emerging state-firm tension. The institutional evolution of the export-oriented industrialization in the PRD has enriched the literature on industrial restructuring in the context of dynamic global-local interactions, but also provided fundamental implications for formulating well-coordinated restructuring strategies among various institutions and concerned actors.     

异常气温作用于水稻一维能量模型的数值分析

应用动力学方程建立四川内江市水稻的生长模型,通过FORCAL和MATLAB对方程参数拟合,并进行数值分析和定性分析,为水稻产量预报和气温对水稻生物量的影响评估提供科学依据。在传统的一维能量模型基础上,将水稻对外界能量的摄取能力与水稻生长季中的气温变化规律联系起来,得到水稻的生长曲线x（t）,并通过相平面轨迹得到x—T曲线,定性分析水稻的临界气温和最快生长率出现时间。通过低温对水稻分蘖期和高温对生殖生长期影响的比较,得出如下结论：水稻后期受高温影响比前期受低温影响严重。     

Model Analysis of the Anthropogenic Aerosol Effect on Clouds over East Asia

A coupled meteorology and aerosol/chemistry model WRF-Chem(Weather Research and Forecast model coupled with Chemistry) was used to conduct a pair of simulations with present-day(PD) and preindustrial(PI) emissions over East Asia to examine the aerosol indirect effect on clouds.As a result of an increase in aerosols in January,the cloud droplet number increased by 650 cm-3 over the ocean and East China,400 cm-3 over Central and Southwest China,and less than 200 cm-3 over North China.The cloud liquid water path(LWP) increased by 40-60 g m-2 over the ocean and Southeast China and 30 g m-2 over Central China;the LWP increased less than 5 g m-2 or decreased by 5 g m-2 over North China.The effective radius(Re) decreased by more than 4 μm over Southwest,Central,and Southeast China and 2μm over North China.In July,variations in cloud properties were more uniform;the cloud droplet number increased by approximately 250-400 cm-3,the LWP increased by approximately 30-50 g m-2,and Re decreased by approximately 3 ?m over most regions of China.In response to cloud property changes from PI to PD,shortwave(SW) cloud radiative forcing strengthened by 30 W m-2 over the ocean and 10 W m-2 over Southeast China,and it weakened slightly by approximately 2-10 W m-2 over Central and Southwest China in January.In July,SW cloud radiative forcing strengthened by 15 W m-2 over Southeast and North China and weakened by 10 W m-2 over Central China.The different responses of SW cloud radiative forcing in different regions was related to cloud feedbacks and natural variability.