豫南山区生态气象条件与桑蚕生产的关系

分析了豫南山区气象条件与桑蚕生产的关系及主要气象灾害,提出了利用气候资源优势发展桑蚕生产的途径和减灾对策.     

海洋测量成果的质量控制

海洋测量的对象是一个受海水覆盖、人们不能直接接触的海底。与陆地测量相比,海洋测量所使用的方法、仪器设备等有很大的不同。根据作者多年的工作实践认为,要确保海洋测量的成果质量关键在于以下两个方面:一是建立健全海洋测量质量管理体系;二是加强人员素质培育和建立合理的激励机制,发挥人的主观能动性。     

中国2003年北极海冰调查及未来北极海冰研究战略

以建立气候模式中的海冰模式为主线 ,首先回顾了国际上海冰模式发展现状和趋势 ,从现有模式机理上存在的问题说明认识海冰各物理过程的现场和实验室调查研究的关键科学问题。之后介绍了中国第二次北极科学考察中的海冰调查内容。最后结合国内调查研究能力和国际上海冰科学发展走向 ,根据国内外资料和极地海冰的客观现象 ,提出 6项战略 ,希望作为以后中国北极海冰理论和模式为背景的现场和实验室研究的方向。     

基于Pauli分解散射参数特性的潮沟信息提取

以长江口九段沙为研究对象,利用2015-04-05全极化Radarsat-2影像数据,首先进行了多视处理和精极化Lee滤波;然后通过Pauli极化分解提取出九段沙水体、潮沟、低矮植被和芦苇的奇次散射系数、45°二面角散射系数和二面角散射系数,并且对4种地物类型(潮沟、水体、低矮植被和芦苇)的3种参数的散射强度分别进行了统计分析;最后选择二面角散射系数作为潮沟信息提取的判别标准,采用区域生长法提取了潮沟信息,并利用数学形态学对区域生长法中的断裂潮沟进行了连接和非潮沟信息的消除。研究结果表明,潮沟和水体的奇次散射强度值分别为0.040和0.038,二者的45°二面角散射系数值为0.001和0.002;潮沟的二面角散射强度值为0.007,低矮植被和芦苇的二面角散射强度值分别为0.783和0.104。     

喀拉海峡潮-地相互作用激发非线性内波的数值模拟

Nonlinear internal waves(NIWs) are ubiquitous around the Kara Sea, a part of the Arctic Ocean that is north of Siberia. Three hot spot sources for internal waves, one of which is the Kara Strait, have been identified based on Envisat ASAR. The generation and evolution of the NIWs through the interactions of the tide and topography across the strait is studied based on a nonhydrostatic numerical model. The model captures most wave characteristics shown by satellite data. A typical inter-packets distance on the Barents Sea side is about 25 km in summer, with a phase speed about 0.65 m/s. A northward background current may intensify the accumulation of energy during generation, but it has little influence on the other properties of the generated waves. The single internal solitary wave(ISW) structure is a special phenomenon that follows major wave trains, with a distance about 5–8 km. This wave is generated with the leading wave packets during the same tidal period. When a steady current toward the Kara Sea is included, the basic generation process is similar, but the waves toward the Kara Sea weaken and display an internal bore-like structure with smaller amplitude than in the control experiment. In winter, due to the growth of sea ice, stratification across the Kara Strait is mainly determined by the salinity, with an almost uniform temperature close to freezing. A pycnocline deepens near the middle of the water depth(Barents Sea side), and the NIWs process is not as important as the NIWs process in summer. There is no fission process during the simulation.     

Hyper-spectrum models for monitoring water quality in Dianshan Lake,China

The correlation between water quality parameters and hyper-spectral reflectance is studied with models established for each parameter and applied in Dianshan Lake, in the upstream of the Huangpu River running through Shanghai, China. Models are for dissolved oxygen (DO in mg/L): R720/R680 = 20.362×(R720/R680)2-31.438×(R720/R680)+19.156; for turbidity (NTU): R*714.5 = 206.07× (R*714.5)2-582.5×R*714.5 + 423.24; and for total phosphorus (TP in mg/L): R*509.5 = 16.661× (R*509.5)2-32.646×R*509.5+16.116. The R2 values are 0.770 8, 0.660 4 and 0.738 7, respectively, showing strong positive relationships. The models were then applied to assess water quality of different times. Results are quite satisfactory for some samples.     

严把矿产资源勘查开发入门关

宁夏回族自治区于4月初出台了《关于进一步加强矿产资源勘查开发管理的若干意见》,《意见》以遏制乱采滥挖、破坏浪费矿产资源,科学、合理地开发利用和保护矿产资源为目的,规范了矿产资源勘查开发准入条件,堵截不具备相应资质条件、经济实力、技术水平和管理能力的企业和单位申请矿业权或参与矿业权竞买;     

宁夏 空间规划助力沿黄经济区建设

据悉,由宁夏国土资源厅组织编制的《宁夏沿黄经济区建设用地空间布局规划》已具雏形。到2020年沿黄经济区土地利用总体规划的用地面积将达295．06万亩,比2009年增长29．41％,加上划定的建设用地扩展区89．12万亩,2020年建设用地可达到387万亩的利用空间,比2009年增长68．5％。     

老鼠簕植物内生真菌Aspergillus terreus (W-8)抗肿瘤活性成分的研究

对红树林植物的枝干、枝叶样品进行微生物分离,以P388细胞为模型进行活性评价得到14株具有抗肿瘤活性的真菌。采用溶剂萃取、柱色谱及半制备HPLC等分离手段对来源于红树林植物老鼠簕Acanthus ilicifolius Linn.的菌株Aspergillus terreus(W-8)发酵产物进行了活性追踪分离,共得到5个化合物。通过理化性质及波谱技术,结合文献,鉴定其结构分别为aspulvinone H1(1)、aspulvinone H(2)b、utyrolactone I(3)t、errein(4)和3-propylbenzene-1,2-diol(5),其中化合物1的核磁数据为首次报道。采用MTT法初步评价了单体化合物的抗肿瘤活性,结果表明化合物4、5对A549、K562和Hela细胞均具有中等强度的细胞毒活性。     

江苏提高耕地开垦费征收标准

日前,江苏省政府办公厅下发了《省政府办公厅转发省国土资源厅等部门关于调整耕地开垦费征收标准意见的通知》,就提高征收标准、调整征收方式、加强资金管理等方面进行了进一步明确和规定。文件自9月1日起开始执行。文件规定,江苏省的耕地开垦费标准由现行的9～13元／平方米提高至13～20元／平方米,其中,苏北地区为13元／平方米,...