太原市大气环境监测优化布点验证研究

本文概述了太原市大气环境监测优化布点方案的验证研究情况。该方案首先由山西省环境监测中心站，根据太原市原有点位的历史监测数据经优化研究给出。     

山西省暴雨气候特征分析

根据山西省109个气象台站1959年至1990年以来的暴雨资料，运用气候统计分析方法，分析了山西省各地暴雨发生的类型，强度，持续时间，时空分布等方面的气候特征。     

利用RIEMS-LRM对黄河河川径流的模拟研究

利用区域系统环境集成模式(RIEMS）和一个offline的大尺度汇流模型(LRM)对黄河的河川径流做了模拟。中国科学院大气物理所东亚中心从1991年开始建立和发展RIEMS，并验证RIEMS对东亚区域气候有较好的模拟能力。LRM是以线性时基不变假定为基础并能够计算水的水平传输的数学模型。RIEMS—LRM可以用来模拟和预测大尺度河流的河川径流。RIEMS—LRM在黄河上游河段的应用证实其有能力对大尺度河流的河川径流进行模拟。此外，作还分析了模拟误差产生的原因。     

东秦岭古生代生物古地理

秦岭褶皱带位于华北板块和扬子板块结合部位,其在河南省内的部分多划为东秦岭。东秦岭以商南-镇平缝合带分为东秦岭北部和东秦岭南部。东秦岭古生代生物古地理演变可以划分为6个阶段。在寒武纪至中奥陶世早期,东秦岭北部二郎坪海槽的寒武纪放射虫和早奥陶世牙形石与东秦岭南部淅川陆棚北部的寒武纪三叶虫、早奥陶世牙形石和头足类属华南生物省,而淅川陆棚南部的寒武纪三叶虫和早奥陶世牙形石属于华南生物省,兼有华北生物省分子。在中奥陶世晚期至奥陶纪末,二郎坪海槽的腹足类、头足类和珊瑚与淅川陆棚的牙形石、珊瑚、腕足类、头足类和三叶虫均属华北生物省。在早志留世,二郎坪海槽的珊瑚与淅川陆棚的笔石属华南生物省。在中志留世至早泥盆世,东秦岭未发现古生物化石,很可能为陆地,并与华北陆块联为一体。在中泥盆世至早石炭世,东秦岭北部柿树园海槽与东秦岭南部南湾海槽的孢子及淅川陆棚的晚泥盆世珊瑚、腕足类和古植物及早石炭世蜓属华南生物省。晚石炭世至二叠纪末,柿树园海槽的孢子见于华北生物省,东秦岭南部缺乏海相沉积。总之,在古生代,东秦岭经历了由华南生物省→华北生物省→华南生物省→华北陆→华南生物省→华北生物省6个阶段,组成3个演变旋回。东秦岭北部和南部生物古地理具有明显的演变方向的统一性和演变时间的相似性。     

Model updating for real time dynamic substructures based on UKF algorithm

Combining the advantages of numerical simulation with experimental testing, real-time dynamic substructure (RTDS) testing provides a new experimental method for the investigation of engineered structures. However, not all unmodeled parts can be physically tested, as testing is often limited by the capacity of the test facility. Model updating is a good option to improve the modeling accuracy for numerical substructures in RTDS. In this study, a model updating method is introduced, which has great performance in describing this nonlinearity. In order to determine the optimal parameters in this model, an Unscented Kalman Filter (UKF)-based algorithm was applied to extract the knowledge contained in the sensors data. All the parameters that need to be identified are listed as the extended state variables, and the identification was achieved via the step-by-step state prediction and state update process. Effectiveness of the proposed method was verified through a group of experimental data, and results showed good agreement. Furthermore, the proposed method was compared with the Extended Kalman Filter (EKF)-based method, and better accuracy was easily found. The proposed parameter identification method has great applicability for structural objects with nonlinear behaviors and could be extended to research in other engineering fields.     

Ciliate Uronema marinum is the causative agent of scuticociliatosis in farm raised turbot Scophthalmus maximus

To identify the pathogen that causes scuticociliatosis in farmed-raised turbot Scophthalmus maximus,we isolated a ciliate from the brain tissue of an infected turbot and identified it as Uronema marinum based on morphological and molecular evidence.We then infected the turbots in artificial laboratory settings with pure cultured U.marinum.The infected turbots showed syndromes similar to those observed in naturally infected ones.Furthermore,microscopic examination and PCR detection confirmed the presence of the ciliate in the tissues of those laboratory-infected turbots.To our best knowledge,this is the first report of scuticociliatosis caused by U.marinum in farm-raised turbot S.maximus in China.     

2014年秭归M4.7、M4.5地震序列与2017年秭归-巴东M4.3、M4.1地震序列对比研究

从地质背景构造、地震序列、震源参数等方面对2014年秭归M4.7、M4.5地震与2017年秭归-巴东M4.3、M4.1地震进行对比分析,得出如下结论：1）2014年M4.7、M4.5地震从微构造上与仙女山断裂北段有关,2017年M4.3、M4.1地震震区最近断裂为周家山-牛口断裂。2）2014年M4.7、M4.5地震余震丰富,记录到的余震500余次,其中2级以上余震5次,最大余震M2.9(ML3.5),余震活动持续超过一个月;2017年M4.3、M4.1地震只记录到余震160多次,2级以上余震3次,最大余震M2.6（ML3.3）,余震活动持续20 d左右。3）2014年M4.7、M4.5地震的最佳震源深度约为7 km,2017年M4.3、M4.1地震的震源深度为3～5 km。4）2014年M4.7、M4.5地震主震优势频率和拐角频率均不高,优势频率为1.5～8.0 Hz,拐角频率为3.0～8.0 Hz,这种频谱特征可能是水库诱发构造地震的特性之一;2017年M4.3、M4.1地震优势频率不高,拐角频率亦较低,有近似陷落或浅表滑坡的特征。     

诸城西北部碎屑岩类孔隙水裂隙水水文地质特征

中生代白垩纪砖红色、紫红色砂岩、砂页岩致密、较坚硬,一直被水文地质工作者视为弱富水岩层。该文以诸城西北部中生界白垩纪红砂岩碎屑岩类孔隙、裂隙水为研究对象,在现场调查、取样化验、水文地质钻探、抽水试验的基础上,对区内碎屑岩类孔隙、裂隙水水环境进行了初步研究。结果显示,区内碎屑岩类孔隙、裂隙水总体富水性较差,孟疃-贾悦断裂北侧受构造及阻水地层影响,形成一个带状富水区;景芝-贾悦断裂和吴家楼断裂组交会地带,受多条断裂多次强烈活动,形成断裂破碎带,形成构造富水区。地下水质量较原来趋于变差,NO_3~-呈面状污染。     

藏北那曲地区草地和未利用土地动态变化及原因

根据1990年和2000年2期那曲土地利用馒盖分类图,运用GIS的空间分析和数理统计功能,分析那曲地区草地退化和未利用土地的增加情况,并结合气象资料和人口资料分析这些变化的原因。结果表明：10a间,那曲地区未利用地增加;草地减少,突出表现为草地向未利用地转化。草地向林地和耕地转化,导致这种结果的主要原因是由于人类的社会经济活动造成的,人类社会经济活动引起这一地区土地利用变化的强度已经超过自然因子所能达到的强度,起到了绝对的主导作用。     

Effects of basic fibroblast growth factor and insulin-like growth factor on cultured cartilage cells from skate Raja porasa

Effects of basic fibroblast growth factor (bFGF) and insulin-like growth factor II (IGF-II) on cartilage cells from proboscis of skate,Raja porasa Günther, were investigated in this study. The cartilage cells were cultured in 20% FBS-supplemented MEM medium at 24°C. Twelve hours after culture initiation, the cartilage cells were treated with bFGF and IGF-II at different concentration combinations. It was found that 20 ng/ml of bFGF or 80 ng/ml of IGF-II was enough to have obvious stimulating effect on the growth and division of skate cartilage cells. Test of bFGF and IGF-II together, revealed that 20 ng/ml of bFGF and 80 ng/ml of IGF-II together had the best stimulating effect on the growth and division of skate cartilage cells. The cartilage cells cultured could form a monolayer at day 7. This work was partially supported and funded by the China Education Committee as the “Imbursement Project for Studied Abroad Returnees”.