GAMIT使用指南

GAMIT是美国麻省理工学院（MIT）和斯克里普斯海洋研究所（SIO）开发的GPS分析软件，本文简要介绍了GAMT安装使用方法。     

山东沿海21种海洋无脊椎动物抗肿瘤活性初步筛选

采用四氮唑盐比色法(MTT)测定了21种青岛及其附近海域常见无脊椎动物94％乙醇粗提物对人白血病细胞HL-60和人肺腺癌细胞A-549的抑制率，同时测定了海筒螅Tubuaria marinha Torrey等动物不同极性溶剂萃取物的活性。发现海燕Asterina pectinifera的正丁醇萃取物、海筒螅的乙酸乙酯萃取物、红条毛肤石鳖Acanthochiton rubrolineatus的94％的乙醇提取物对HL-60的抑制作用很强，在浓度为0．063mg／mL时抑制率分别为96．7％、63．9％、50．5％；海筒螅的乙酸乙酯萃取物对A．549的抑制率较高，浓度为0．063mg／mL时的抑制率可以达到65.4%.     

Engaging with “urban science”

In this Intervention we discuss possible engagements between an inherently diverse urban geography and an emergent “urban science” dealing with information technology-driven, quantitative analysis of urban data. Although initial responses from some quarters of the urban geography community have been dismissive, we highlight three ways in which urban geography could positively engage with urban science: (1) by exhibiting greater ownership of our discipline’s past and the legacy of spatial science; (2) by resisting equating post-positivism with anti-positivism; and (3) by recognizing that the inherent ability of urban science to address post-truth thinking can be a useful building block in a pluralist approach to urban geography. We contend that (a) urban geographers need to be open to the use of new urban science methods to interrogate the pressing issues of our time and (b) where appropriate, inject cautionary tales of the dangers of a naive positivism in an uncritical urban science.     

利用"缓冲法"进行空间数据的插补和知识挖掘

利用重复查询和运算的数学法则,提出了用MITQueryJoin的方法解决在数据库建库工作中局部“数据空洞”的问题,并实现了科学的知识挖掘。