面向新经济的测绘工程专业改造升级路径探讨     

阎波杰  林棋  王库  张建霞  李进强  秦艳芳 《测绘与空间地理信息》2020,(2):12-16,20

针对传统测绘工程专业难以适应当前新经济环境,需要进行改造升级的现状,本文以闽江学院测绘工程专业为研究对象,依托现有测绘工程、地理信息科学和导航工程等3个专业,通过合理联动、适时修改测绘工程专业的教学大纲与教学内容,将地理信息科学和导航工程专业的相关教学资源融入测绘工程专业,建立以地理学、计算机科学与技术、测绘科学与技术为主线的现代测绘工程课程体系。以现有的"测绘地理信息专业群"为基础,构建了以地方特色产业发展和需要为导向、学科交叉互补的新型学科发展体系,提出了测绘工程专业多学科交叉复合改造的具体途径与方式。最后,建立了基于测绘工程专业改造升级的无人机遥感监测与应急测绘应用新方向并形成新的课程体系,以期为新经济环境下测绘工程专业人才的培养、学科发展、教学管理等提供参考。  相似文献   

Biosorption of Procion Red MX 5B by Bacillus subtilis and Its Extracellular Polysaccharide: Effect of Immobilization     

Arthur Raj Binupriya  Muthuswamy Sathishkumar  Chang Sub Ku  Sool Il Yun 《洁净——土壤、空气、水》2010,38(8):775-780

Bacillus subtilis and its extracellular polysaccharide (EPS) were used in free form as well as immobilized form as biosorbent for the removal of an anionic dye Procion Red MX 5B. Low pH was favourable for biosorption. Immobilization resulted in reduced biosorption of the dye. The presence of functional groups responsible for the high adsorption capacity in free cells (FC) and EPS was confirmed by FTIR analysis. High Q_max and b values were noted in the case of FC and free EPS in contrast to immobilized cells and EPS. The kinetics data showed that the adsorption system followed pseudo‐first‐order reaction at low dye concentration. Desorption of the dye was found to be 100% in 1 N NaOH. In the case of immobilized biomass and EPS the alginate was found to be unstable under high alkaline conditions of NaOH.  相似文献   

Possible northward extension of the Philippine Fault Zone offshore Luzon Island (Philippines)     

Leo Armada  Shu-Kun Hsu  Chia-Yen Ku  Wen-Bin Doo  Wen-Nan Wu  Carla Dimalanta  Graciano Yumul Jr. 《Marine Geophysical Researches》2012,33(4):369-377

The Philippine Fault Zone, a system of left-lateral strike-slip faults traversing the length of the Philippine Islands, is associated with the oblique convergence between the Philippine Sea Plate (PSP) and the Eurasian Plate (EP). Although it is a major deformational structure within the diffuse PSP–EP convergent boundary, some of its segments, particularly its marine extensions, are not well studied. To investigate the crustal deformation in the marine prolongation of the Philippine Fault Zone offshore Luzon Island, multi-channel seismic (MCS) data, gravity data and centroid moment tensor solutions were used in this study. Focal mechanism solutions from the Global CMT catalog were inverted to determine the average principal stress directions and consequently understand the prevailing stress regime in the study area. The stress inversion results indicate that the direction of maximum compression (σ1) is 321°N, which coincides with the PSP–EP convergence direction. From the MCS profiles, the study area was subdivided into deformation zone and a relatively stable zone. Thrust faulting, folding and general uplift are observed in the deformation zone. This zone is further subdivided into the active and inactive segments. In the active segment, uplift is occurring in the submarine ridge. This deformation pattern can be related to the ongoing uplift in some regions bisected by the PFZ. The inactive segment, characterized by intense folding of the sequences and faulting of the basement and overlying sequences, is suggested as the precursor of the Philippine Fault Zone. Deformation appears to be recently shifted to the east as delineated by an uplifted N-NW trending submarine ridge offshore NW Luzon Island.  相似文献   

任意方向震源二维兰姆问题的一个精确解          下载免费PDF全文

孙成禹  张立 《地球物理学报》2012,55(10):3370-3378

均匀弹性半空间表面或内部震源产生的地震波场的解析解属于Lamb问题,采用Cagniard-deHoop方法,对与水平面呈任意夹角的表面线源,求解了其作用于弹性半空间时的拉普拉斯-傅里叶双积分变换解.以δ-脉冲函数为例,给出了任意方向作用力下波场的构成,并定量解出了P波、S波、首波和Rayleigh波等各波的位移表达式,分析了不同作用方向下各波位移的相对大小.建立数值模型并进行数值模拟,模拟结果验证了理论研究的正确性.研究成果为近地表地震波场的研究提供了理论依据.  相似文献   

基于最佳小波基的地震面波插值方法     

王志农  孙成禹  伍敦仕 《物探与化探》2019,(1):189-198

在利用实际地震数据中的面波反演近地表横波速度的过程中,若道间距较大、空间采样率不足,则会产生空间假频现象,从而降低频率速度谱的信噪比,影响频散曲线提取的精度以及反演效果,因此需要针对面波进行插值处理。文中提出了一种基于最佳小波基的地震面波插值方法,通过理论分析和实验误差对比在地震数据处理常用的众多小波基中选出适用于插值处理的最佳小波基bior6.8,提高了插值精度。针对面波同向轴为线性且斜率较大的特点,文中首先采用线性动校正的方法对面波进行拉平处理,再进行小波变换插值,最后进行反线性动校正恢复面波。通过对理论模型与实际资料进行插值处理验证了本文方法的有效性,插值后的面波记录波形恢复较好,显著提高了频率速度谱的信噪比,有效解决了面波数据空间采样率不足引起的假频问题。  相似文献   

燕山地区冀北坳陷元古界下马岭组沥青砂岩岩石学特征和沉积环境          下载免费PDF全文

朱毅秀  杨程宇  王欢  肖劲光 《古地理学报》2019,21(3):431-440

通过对冀北坳陷中新元古界下马岭组进行剖面实测,对下马岭组底部的沥青砂岩进行室内薄片鉴定和扫描电镜分析,观察与分析了下马岭组沥青砂岩的出露分布特征,镜下研究了此砂岩的碎屑颗粒和填隙物的组分特征和磨圆、分选、粒度等结构特征,依据岩石学特征、粒度分析系列参数等研究了沥青砂岩的沉积环境。结果表明此砂岩为成分与结构成熟度均高的纯石英砂岩和石英砂岩,硅质与沥青质填隙、沥青含量达5%~15%,细粒为主,分选好到极好。粒度分析是本段松散状沥青砂有效环境判别标志。综合分析认为下马岭沥青砂岩形成于无障壁海岸体系的滨浅海环境,形成于前滨到临滨的海相高能环境,可能的沉积位置是前滨下部到中上临滨;此砂岩主要来自临滨潮下高能带的沉积物、含部分前滨下部沉积物、也夹少量潮汐水道沉积物。不同剖面位置所处的沉积环境不同,凌源地区和平泉地区为临滨带的中上部的水下高能带沉积为主,宽城地区为临滨带上部沉积和前滨下部沉积,凌源地区和宽城地区也包含少量的潮汐水道沉积。  相似文献   

Influences of human activities and agriculture on groundwater quality of Kayseri-Incesu-Dokuzpınar springs,central Anatolian part of Turkey   总被引：3，自引：0，他引：3  

Hatim?ElhatipEmail author  Mustafa?Af?in  lkay?Ku??u  Kadir?Dirik  Yakup?Kurma?  Murat?Kavurmac? 《Environmental Geology》2003,44(4):490-494

Human activities and agriculture have had direct and indirect effects on the rates of contamination of groundwater in the Incesu-Dokuzp inar spring area. Direct effects include dissolution and transport of excess quantities of fertilizers with associated materials and hydrological alterations related to irrigation and drainage. Indirect effects may include changes in water–rock reactions in soils and aquifers caused by increased concentrations of dissolved oxidants, protons, and major ions. Agricultural activities have directly or indirectly affected the concentrations of a large number of inorganic chemicals in groundwater, for example NO ₃, N ₂, Cl, SO ₄ ², H ⁺, K, Mg, Ca, Fe, Cu, B, Pb, and Zn, as well as a wide variety of pesticides and other organic compounds. For reactive contaminants like NO ₃, it is recommended that a combination of hydrochemical and environmental-tracer analytical approaches might be required to resolve changing inputs from subsequent alterations as causes of concentration gradients in groundwater. The water type of Dokuzp inar springs is mainly Na–Mg–Ca–Cl–HCO ₃. Note that the water types of the springs were directly related to the hydrogeochemical properties of outcrops at the study area. Thus, the high concentration of Ca ²⁺ and HCO ₃ is mainly related to the high CO ₂ contents in the marbles, whereas the high Na concentration arises from the existing syenite, volcanic ash, basalt, and clay units, although the Incesu-Dokuzp inar springs cover most of the drinking and irrigation water demands of this area. The high concentrations of NO ₃ and NaCl show that the area around the springs is continuously being contaminated by untreated sewage and agricultural wastes, especially during dry periods. Therefore, this approach is based on the vulnerability studies of the catchment area, determination of the transfer time of the pollutant, and the water-bearing formations of Incesu-Dokuzp inar springs. Vulnerability in this study is defined as the intrinsic hydrogeochemical characteristics of an aquifer, which may show the sensitivity of groundwater to be contaminated by different human activities.  相似文献   

澳门及其邻近地区海陆风的模拟   总被引：11，自引：0，他引：11  

Lin Wenshi  Wang Anyu  Wu Chisheng  Fong Soi Kun  Ku Chimeng 《大气科学进展》2001,18(6):1231-1240

利用宾州／美国国家大气研究中心的ＭＭ５模式来模拟澳门的海陆风和珠江口的三维风场。模式设计为四重套网格,分辨率分别为 １ｋｍ,３ ｋｍ,９ ｋｍ,２７ ｋｍ。使用常规观测资料作为初始场,模拟时间为３０小时。结果表明采用高分辨率（１ｋｍ）模拟能很好地捕捉到澳门的海风和陆风。海风锋和热力内边界层也清楚可见。如果最小分辨率为３ ｋｍ,则只捕捉到海风,陆风却模拟不出来。  相似文献   

北京石花洞地区水系氢氧同位素及氚含量研究──石花洞研究系列之一   总被引：9，自引：0，他引：9       下载免费PDF全文

李红春  赵树森 《地震地质》1996,18(4):325-328

北京石花洞地区水系的δＤ平均值为（－６５．４±３．０）‰（ＳＭＯＷ），δ１８Ｏ平均值为（－９．４±０．３）‰（ＳＭＯＷ），氚含量平均值为（３０．８±４．５）ＴＵ。石花洞洞内滴水是由地表水很快下渗得来，受古老地下水的混合作用很小。因此，洞内滴水的稳定同位素组成能够灵敏地反映地表水同位素组成（即重量加权的年平均雨水的同位素组成）的变化。影响洞内滴水的稳定同位素组成的因素主要是年平均气温、年降雨量以及降水气团的来源的变化。利用高分辨率的洞穴碳酸盐的稳定同位素记录．可以建立以湿度变化为主的古气候信息．尤其是我国季风气候的变化历史  相似文献   

    

Lin Wenshi  Wang Anyu  Wu Chisheng  Fong Soi Kun  Ku Chimeng 《大气科学进展》2001,18(6):1231-1240

PSU/NCAR MM5 was utilized to simulate the sea-land breeze circulation in Macao and the three-dimensional flow around the Pearl River estuary. Four two-way nested grids having resolution of 1, 3, 9, and 27 km were included in the simulation. It was initialized with conventional observational data, and a 30 h simulation and analysis of one sea-land breeze case were performed. It was shown that the model with a finer resolution (1 km) captures the sea breeze and land breeze in Macao with reasonable skill. The sea breeze front and the thermal internal boundary layer (TIBL) were also obviously revealed. However, the coarser horizontal resolution (3 km) could capture the sea breeze but not the land breeze. This research is jointly supported by the grant of the Chinese State Commission of Science and Technology Climbing A “SCSMEX” and the National Natural Science Foundation of China (Grant No. 49794030).  相似文献