新制度经济学视角下高校周边商业街分异研究——以湖南师范大学和湖南大学本部校区为例

高校扩招带来了其周边商业街的蓬勃发展,已有研究从不同角度对其展开论述,新制度经济学的发展与完善为理解高校周边商业街的分异提供了新的可能性。以湖南师范大学和湖南大学本部校区的4条商业街为例,从新制度经济学的角度解释高校周边商业街分异现象,以期丰富新制度经济学视角微观实证研究的内容。实地调研发现,制度对高校周边商业街的分异具有重要作用,正式制度对不同主体的约束作用不同,进而形成一系列非正式制度,从而共同维系了商业街的发展。最后,从制度的角度对高校周边商业街的发展提出了建议。     

新型天气雷达发射脉冲包络检测集成系统设计与实现

实现一种新型天气雷达发射脉冲包络检测集成技术,高度集成数控衰减器、包络检波器、A/D转换器和FPGA(Field Programmable Gate Array)处理器;能快速准确的对发射机脉冲特性进行检测,无需其他仪器和工具辅助,全自动测试,自动生成测试报告并根据测试结果给出检修建议,能够有效解决台站天气雷达对发射脉冲包络传统测试和维护的单一测试仪器功能,有效降低人为测试误差,减少天气雷达故障诊断和日常维护带来的制约和影响,促进天气雷达测试、维护维修保障的标准化和自动化。     

Polymetallic Nodule Mining, Waste Disposal, and Species Extinction at the Abyssal Seafloor

The size of individual mining blocks for polymetallic nodule extraction seems to be rather small, not more than 100 km² in the French mining claim. Even when adding an additional resedimentation zone to the directly impacted area, the size of the affected seabed would remain below 200 km². We assume that even rare species in the abyss inhabit larger areas and propose discussions of the International Seabed Authority and other stakeholders for the different subregions on mining strategies from the perspective of exploitation versus species extinction and conservation. Although impacts of waste disposal at the abyssal seafloor are different from those of nodule mining, the 200 km² concept may also be applied.     

Species richness of the genus Molgolaimus (Nematoda) from local to ocean scale along continental slopes

This study investigated the distribution of Molgolaimus species (Nematoda) at different hierarchical spatial scales and observed the turnover of species along bathymetrical transects and among transects in two separate geographical regions. Samples from six transects (200–2000 m) from the Southern Oceans (SO) and four bathymetric transects (50–2000 m) from the Western Indian Ocean (WIO) were compared. Of the 30 species recorded, only one was common to both regions. WIO had higher local species richness than the SO. In both regions, the local scale was the greatest contributor to the total species richness. In the SO, there was no difference between species turnover at the different spatial scales, however, in the WIO, the turnover along bathymetrical transects was higher than among separated transects. For the particular genus studied, the evidence suggests that the study area in WIO has more widespread species and was better sampled, while the SO has many restricted species and it is most probably characterized by different biogeographical provinces. At the ocean scale (i.e. WIO versus SO), evolutionary histories may have strongly influenced nematodes species composition, while at local and regional scales, ecological processes are probably promoting species co‐existence and speciation. The high co‐existence of certain species at local scale is partially explained by species preference for different sediment layers.     

黄河三角洲温地鸟类名录

1996－1998年对黄河三角洲湿地鸟类连续进行了3年观察和调查，共观察到和鉴定出湿地鸟类199种，隶属于16目38科。     

中国马尾藻属的研究 Ⅵ.斯氏种群的四个新种

对中国真马尾藻亚属SubgenusSargassum刺托组SectionAcanthocarpicae宾德系SeriesBinderiana斯氏种群SpeciesgroupSwartzia的研究中，发现该种群新种4个，它们是原始马尾藻SargassumprimitivumTsengetLusp．nov，模式标本于1992年4月10日采自海南省文昌县，模式标本号AST92－0296；海南马尾藻SargassumhainanenseTsenget,Lusp．nov，模式标本于1955年3月25日采自海南省文昌县清澜港，模式标本号AST55－0714；文昌马尾藻SargassumwenchangenseTsengetLusp．nov，模式标本于1958年6月22日采自海南省文昌县，模式标本号A5T58－6059；微小马尾藻SARGASSUMPUSILLUMTsengetLusp.nov，模式标本于1955年4月28日采自广西涠洲岛，模式标本号AST55－1973。     

基于地物光谱的赤潮优势种识别研究

利用2001年获取的不同优势种赤潮水体的现场光谱数据，处理得到了不同优势种赤潮水体的遥感反射率光谱曲线；在此基础上，发展了基于光谱角度制图法(Spectral Angle Mapping，SAM)和互相关光谱匹配法(Cross Correlogram Spectral Mapping，CCSM)的赤潮优势种识别算法。数据实验结果表明，上述两种方法对于实现基于光谱数据的赤潮优势种识别是基本有效的，且CCSM方法的识别结果略优于SAM方法。进一步提高上述方法的适用性在于大量获取不同优势种赤潮的光谱数据并建立赤潮光谱数据库。     

香港海区双壳类帘蛤科一新种

帘蛤科一新种——扁平美女蛤Circe(Laevicirce)hongkongensis sp.nov.系于1988年采自香港大潭湾潮下带。新种的主要特征是两壳极扁平,铰合部宽阔,区别于本亚属的其他种。