伊犁盆地石炭系石油地质特征与勘探潜力

野外剖面资料与已钻探井资料分析表明,伊犁盆地石炭系超覆于前石炭系变质基底上,层序齐全,厚度较大.共划分为五个地层组,包括下统的大哈拉军山组、阿克沙克组,上统的伊什基里克组、东图津河组以及科古琴山组.石炭系中发育泥质岩和碳酸盐岩两类烃源岩,以碳酸盐岩为主,主要发育在阿克沙克组和东图津河组.烃源岩有机碳丰度较好,主体属于较...     

Precise Determination of Sm and Nd Concentrations and Nd Isotopic Compositions in Highly Depleted Ultramafic Reference Materials

In this study, a high‐precision method for the determination of Sm and Nd concentrations and Nd isotopic composition in highly depleted ultramafic rocks without a preconcentration step is presented. The samples were first digested using the conventional HF + HNO₃ + HClO₄ method, followed by the complete digestion of chromite in the samples using HClO₄ at 190–200 °C and then complete dissolution of fluoride formed during the HF decomposition step using H₃BO₃. These steps ensured the complete digestion of the ultramafic rocks. The rare earth elements (REEs) were separated from the sample matrix using conventional cation‐exchange chromatography; subsequently, Sm and Nd were separated using the LN columns. Neodymium isotopes were determined as NdO⁺, whereas Sm isotopes were measured as Sm⁺, both with very high sensitivity using single W filaments with TaF₅ as an ion emitter. Several highly depleted ultramafic rock reference materials including USGS DTS‐1, DTS‐2, DTS‐2b, PCC‐1 and GSJ JP‐1, which contain extremely low amounts of Sm and Nd (down to sub ng g^?1 level), were analysed, and high‐precision Sm and Nd concentration and Nd isotope data were obtained. This is the first report of the Sm‐Nd isotopic compositions of these ultramafic rock reference materials except for PCC‐1.     

洞庭湖区旅游城镇化系统耦合协调性时空格局及影响因素

基于旅游产业、城镇化和生态环境耦合协调作用机理,运用耦合协调模型分析洞庭湖区2000—2018年17个县域旅游城镇化系统耦合协调性的时空格局及影响因素。结果表明:①时序特征上,近20 a来耦合度和协调度呈现同步上升态势,两者均出现"一波三折"过程变化特点。耦合度增强的同时,协调度也随之增强,但滞后于耦合度的变化,协调水平有待提升。②空间格局上,协调度与耦合度均呈现出"中部低、四周高"的分布特点。17个县域2个典型年份的耦合度和协调度出现了不同类型的转变,高层次耦合类型和协调类型的县域集中分布在洞庭湖外围地区,低层次的县域则集中分布在洞庭湖中部地区。③耦合协调类型的空间组合差异明显,由低层次向高层次转变的县域达到9个,组合类型的空间分布格局与耦合度和协调度的分异特征基本相似。④相关分析表明,协调度与表征旅游产业发展水平、城镇化发展水平和生态环境治理水平因子的较强相关性是形成这种时空分异格局的主要影响因素。     

Developing a new grey dynamic modeling system for evaluation of biology and pollution indicators of the marine environment in coastal areas

Pollution of the marine environment leads to corresponding changes within the ecosystem. Thus, evaluation of the marine environment for management purposes, which is a procedure complicated by multi-hierarchy, multi-factors, and multi-uncertainty, should be considered from both ecological and environmental standpoints. Currently, the lack of consideration of the relationship between bio-indicators and water pollution in marine environmental evaluation hinders the efforts of conventional modeling approaches in this field. This paper presents an innovative dynamic modeling system that we call the grey dynamic modeling system (GDMS). This system synthesizes the analytic hierarchy process (AHP), grey target theory (GTT), and grey forecasting modeling approaches (GM(1,1)), and it takes both ecological and environmental factors into account during evaluation and forecasting of the marine environment in coastal areas. To effectively eliminate the subjective errors of the traditional AHP process, the GTT analysis is used to replace expert scoring, which defines the grey relational grades of the bio-indicator indices(BI) and the water pollution indices(WPI).The structure of the AHP then is applied to link the bio-indicators and pollution, which enables the system to generate the primary factors necessary for the evaluation of the marine environment from both ecological and pollution perspectives. The new modeling system was used to evaluate and forecast the marine eco-environment in the Tianjin section of Bohai Bay, China. This case study highlights the key features of the approach. The bio-indicator indices(BI) and water pollution indices(WPI) monitoring data from 2002 to 2007 of 8 monitoring sites are input to this dynamic modeling system and the results illustrate the following: Pollution of the study area is currently serious and tends to be worse in the future, and the worst areas are sites 2, 3, and 4 based on their key pollution indices biochemical oxygen demand (BOD), dissolved inorganic phosphorus (DIP), and dissolved inorganic nitrogen (DIN)) which have the main effects on marine eco-system. These results can be used as the basis for marine environmental manager to define the key pollution factors, key pollution sites and the pollution trends of the marine environment of the whole study area.     

基于3S技术的叶县土地利用规划应用研究

3S技术能为土地利用规划领域的研究和实践提供科学有效的方法和手段。结合我省开展的新一轮土地利用总体规划,介绍了3S技术在土地利用规划的数据准备与处理、规划编制与实施及规划成果管理等各阶段的应用。     

一种航空影像阴影补偿方法

首先,对航空影像进行影像分割和阈值计算来预测阴影区域。其次,计算阴影区域的直射光与环境光的比值,同时,采用多波段合成方式实现阴影区域与非阴影区域之间的平滑过渡;最后,根据特定的阴影光照模型完成阴影补偿。实验结果表明,该方法不仅能有效补偿阴影,还能确保补偿后的阴影区域与非阴影区域平滑过渡。     

空间数据索引的实现

介绍空间索引实现的几种方法,提出建立合理的空间数据库体系结构,对各种数据表建立主键索引和关系索引,建立多层数据库的访问结构,最大限度地提高数据库响应时间。     

地区间基因差异会影响技术转移吗?——基于中国2001—2005年省际专利转让数据

技术转移是促进区域协调发展和创新资源高效配置的重要手段。专利转让是中国技术转移交易市场的主要部分,其背后的机制还没有得到充分解释。论文利用已有的遗传距离测算方法和广受认可的汉族人口基因数据,尝试从基因差异的角度探索跨地区专利转让的机制。通过挖掘国家知识产权局专利检索平台的专利转让数据,并结合其他经济地理数据,对遗传距离是否会影响省际间专利转让进行计量考察。借鉴“同性相斥异性相吸”的理论,从技术市场竞争角度建构了研究模型。通过2001—2005年省级面板数据进行计量回归检验,结果发现,遗传距离越远,反而更容易发生跨地区专利转让。在平均水平上,2个地区间基因差异每扩大1个标准差,专利转让数就会提高9.8%。结果经过了若干稳健性检验,并对其中的空间差异性作了分析。研究揭示了基因多样性对于人类社会的意义,并启示现实政策应该放宽迁徙和落户限制,鼓励跨地区的交流与融合。     

结构阻尼与材料阻尼的关系

针对固体材料在弹性阶段的内阻尼,采用材料粘弹性本构关系,通过有限单元法建立了考虑剪切变形影响的杆单元阻尼矩阵,得到了材料拉压粘滞系数和剪切粘滞系数之间的关系。我们可以通过实验测试材料的损耗因子或粘滞阻尼系数(材料阻尼),像结构质量矩阵、刚度矩阵一样通过比较确切的计算得到弹性阶段结构内阻尼的阻尼矩阵(结构阻尼),而且此阻尼矩阵既基于材料阻尼实验测试,又便于数学处理,且物理意义明确。其次,本文分析了材料阻尼对结构阻尼比影响,得到了材料损耗因子与结构模态阻尼比间的关系,并通过10层钢筋混凝土剪切型框架结构进一步给出了具体的数值结果。     

塔里木盆地库车坳陷北部构造带地质结构与油气勘探领域

地质结构、构造演化及其与油气成藏的关系是制约塔里木盆地库车坳陷北部构造带油气勘探进程的重要因素.以地震剖面为基础,结合区域构造背景、露头地层特征以及钻井资料,对北部构造带3个构造段(吐格尔明、迪北吐孜、巴什)的地质结构进行了详细解剖,恢复了构造演化史,并分析了变形特征,最后在构造演化与油气成藏关系的基础上,讨论了北部构...