山东省海洋装备产业聚集区建设布局研究

文章从山东省海洋装备产业发展现状和区域内产业结构布局出发,分析国内外产业布局,研究山东省海洋装备产业空间分布和领域布局现状,提出山东省海洋装备产业的发展战略和聚集区建设总体布局,为下一步山东省海洋装备产业聚集发展提供对策依据。     

One-dimensional electrokinetic stabilization of dredged mud

Reuse of dredged marine sediments for land reclamation is a sustainable method for disposing the large quantities of dredged spoil, accumulating every year worldwide. However, due to their high water content and low permeability, dewatering and self-sedimentation of the material takes a long time to be completed. Therefore, different methods, such as prefabricated vertical drains and vacuum preloading, are used to improve the consolidation properties of the dredged mud at the port of Brisbane. Among these stabilization methods, vacuum preloading is determined as the most effective method to increase the consolidation of the dredged mud. However, clogging during vacuum consolidation is undesirable. Therefore, electrokinetic stabilization draws attention since it is an environmentally friendly and time efficient method to dewater and consolidate dredged mud significantly. The effectiveness of the electrokinetic stabilization depends on the properties of the soil and the electrode configurations. One-dimensional and two-dimensional electrode configurations are the most popular configurations. In this study, the effect of one-dimensional electrode configuration, which is installation of electrodes in arrays of anodes and cathodes on consolidation parameters of dredged mud, is investigated. Based on this study, the dredged mud sediments can be stabilized using one-dimensional electrokinetic stabilization which resulted in improving compression index and coefficient of volume compressibility and reduction of soil plasticity index.     

我国井下地电阻率观测技术现状分析

地震地电阻率前兆观测在中国开展了近50年,各种电磁干扰以及一些与地震无关的地表覆盖层电性结构变化一直影响着地电阻率观测,特别是近年来,电磁干扰越来越严重,为了抑制和减小电磁干扰和环境因素的影响,多个台站开展了试验性的井下地电阻率观测。通过对我国目前开展井下地电阻率观测台站的调研,总结了观测中成功的经验和存在的问题,并在此基础上,对井下观测装置技术的各个环节,提出相应较合理的技术措施。     

中国东北东部边境地区旅游业发展研究

近年来,随着东北三省几大经济区(带)的战略地位上升,以及一批重大基础设施的相继开建,使得东北地区经济呈现出快速发展之势。同时东北区域一体化进程明显地加快,东北亚地区国际环境的改善以及合作需求的增强,为东北东部边境地区旅游业发展提供了巨大动力。在具体分析了东北东部边境地区旅游资源优势、旅游业发展现状及存在问题的基础上,对区域旅游业发展提出具体建议,特色旅游产品开发主要集中于对边境旅游、自然生态旅游、冰雪旅游、文化旅游等产品的开发,并在此基础上构建"五区-四轴"的旅游空间布局及区域战略合作关系。     

石家庄市绿地系统景观结构与空间布局模式

以石家庄市绿地系统资料为基础,应用景观斑块谱方法,分析绿地系统景观结构特征,提出一个合理的空间模式。石家庄市各种绿地类型和各等级绿地斑块中均以附属绿地斑块占优势,绿地系统可概括为"一带两环四楔多点"的复合型空间布局模式;进一步的调整包括:增加大中型生产绿地、防护绿地和公园绿地,适当将有条件的中小型绿地斑块连片,通过扩大公园绿地、防护绿地和附属绿地促进楔形绿地发育,在居住区、单位和道路附近增加中型公园绿地和小型街旁绿地。通过空间布局模式调整,可将石家庄市各类绿地斑块连接成网,组成功能完善、类型多样的生态绿地系统。     

荆州市城市首级GPS控制网的建立

介绍了采用GPS技术建立荆州市城市首级控制网的布网方式、标石选埋、外业施测、数据处理的方法与经验。     

大地电场铅电极的研制

张家口地震中心台经过多次试验,成功研制了大地电场铅电极,采用新型的电极孔成孔方法及埋设技术进行了试验观测,从实验数据中可以明显看到地电场的日变形态。该电极具有制作工艺合理、电极差较小、稳定性能较好、噪声低、使用寿命长、易于保存和使用方便等特点,不仅可以满足大地电场长期定点观测的要求,还可以用于地电阻率观测,亦可作为地震电磁扰动观测中的电极传感器。铅电极应用前景广阔。     

Preparation and Properties of Embeddable Ag/AgCl Gelling Reference Electrode for Rebars Corrosion Monitoring in Concrete

Reference electrodes are a key part for corrosion monitoring and measurement of rebars in concrete. A reference electrode that can be buried in concrete is fabricated by using Ag/AgCl electrode and methyl cellulose gelling electrolyte. The stability, repeatability and anti-polarization of the reference electrode are investigated; the influences of the inner electrolyte loss, exterior OH? contamination, and temperature on the potential of the reference electrode are also investigated in this paper. The results show that the reference electrode has good stability, repeatability, and anti- polarization. The influences of inner electrolyte loss, exterior OH? contamination, and temperature on the potential of the reference electrode are minimal. Therefore, it can be used for corrosion monitoring and measurement of rebars in concrete.     

高密度电法反演分辨率数值模拟与分析

高密度电法在反演过程中,电极距相比电性异常体横向长度过大时,电性异常体在反演中无法得到约束;某电极距下,当电性异常体埋藏深度增加大到一定深度时,在反演中电性异常体也无法得到约束。针对以上两个问题,利用res2dmod正演软件建立模型,再利用res2dinv反演软件对模型进行反演,通过对比分析结果表明:温纳、偶极和微分三种装置分两种情况:如果电极距小于20m模拟条件下,对于埋藏深度为5m且剖面面积不同的电性异常高阻体(异常体电阻率=100Ω·m,围岩电阻率=10Ω·m),横向反演分辨率,温纳装置大于微分和偶极装置;电极距小于12.75m时,微分装置大于偶极装置,电极距大于12.75m时,偶极装置大于微分装置。如果电极距在2m^8m范围内,对于剖面面积为4×4(m2)的电性异常高阻体(异常体电阻率=100Ω·m,围岩电阻率=10Ω·m),其最大约束深度随电极距的增大而先增大后减小;相同电极距下,偶极装置的最大约束深度>微分装置的最大约束深度>温纳装置的最大约束深度。     

秦巴山区自然条件与农业立体布局设计

本文从分析鄂境秦巴山区农业自然条件着手,着重论述光、热、水、土等农业自然条件对发展立体农业的有利因素和限制因素。在揭示自然结构分异特征的基础上,探讨划分山区农业自然资源地带,从而进行山区农业布局的宏观立体设计。