A New Type Anticorrosion Coating for Ocean Reinforced Concrete Structures

—Corrosion of reinforced concrete structures is a serious problem in ocean engineering.As anorientation of study anticorrosion coating technique is developed and widely applied.but many problemsneed to be solved.LSW-2 type anticorrosion coating for maritime reinforced concrete structures is charac-terized by sea water resistance.salt fog resistance.moisture and heat resistance as well as impermeabilityto chlorions.The new type coating can be applied to wet concrete surface by conventional constructiontechnique.It is a breakthrough in solving the above- mentioned problem.The paper mainly introduces thetest results.the property indices.coating procedure.construction technique and economic benefit ofthe coating.     

影响强夯地面振动衰减的因素分析

夯击能量和地基土体特性是影响强夯地面振动衰减的两个重要因素。观测和分析表明 ,夯击能量越大 ,地面振动衰减越快。在较小的夯检距上 ,强夯地面振动的强度对夯击能量的变化相对较敏感 ,表现为在近距离上地面振动强度随夯击能量增加的速率较大。地面振动随距离的负指数幂衰减公式中当量系数 k值的大小与强夯夯击能和场地介质条件有关 ;而衰减指数 β值的大小主要与场地介质条件有关。这些规律对于强夯振动效应的评价和岩土体动力学特性的研究具有重要意义     

西昌盆地七里坝构造油气化探异常特征及构造含油气评价

通过西昌攀西盆地七里坝构造油气化探工作 ,发现了油气化探弱异常 ,进行了化探异常特征、存在形式以及与油气的关系的研究 ,结果表明 ,七里坝各类异常是该构造内存在有异常源 ,但异常源的烃量可能已有相当部分逸散掉了     

炼铝工业固体废料(赤泥)的物质组成与工程特性及其防治利用研究

据保守估算 ,我国每年排放的铝工业固体废料赤泥至少在 5 0 0万 t以上。由于赤泥对生态环境的严重危害 ,赤泥坝、赤泥库的安全已成为令人关注的环境问题。各类固体废弃物 (包括生活垃圾 )储存、处理和利用的研究不仅是当代环境科学的重要任务 ,亦是当代环境工程地质学、环境岩土工程学最重要、最迫切的研究任务之一。本文利用工程岩土学的有关理论和方法 ,系统地研究了赤泥的化学、矿物成分、不良工程特性及其形成变化机理 ,并在此基础上提出了赤泥的储存、加固 (处理 )和综合利用的原理和途径。     

麦饭石及其应用开发刍议

麦饭石是一种由我国古代医学家命名的传统中药品种 ,它属于花岗质岩类 ,其中含维持动物体正常生长所必备的 18种元素。近年来研究表明 ,麦饭石除其医疗功能之外 ,还以其所具有的生物活性、吸附性、水调节性、矿化性而在保健、美容、畜牧、水产养殖及食品生产、环保等领域具有广泛的用途 ,具有很大的开发潜力     

The density functional calculations on the structural and electronic properties of the endohedral fullerene dimer (N2@C60)2

The generalised gradient approximation based on density functional theory is used to study the structural and electronic properties of the endohedral fullerene dimer (N₂@C₆₀)₂. Four N atoms sit at the cage centres in the form of two N_2 molecules. The density of states and Mulliken charge analysis explore that the energy levels from -6 to -10 eV are mainly influenced by the N₂ molecules.     

基础地理信息共享政策的初步研究

基础地理信息共享,有利于减少重复测绘,实现基础测绘资源节约利用和财政资金的高效利用。本文分析了我国基础地理信息共享的现状,利用经济学的产权理论和等价交换原理分析了基础地理信息共享,提出了推进共享的有关政策建议。     

Unintended consequences: The spillover effects of common property regulations

The closure of the Hawaiian longline swordfish fishery over the period 2001–2004, which was motivated by the protection of endangered sea turtles, created the elements of a natural experiment that allows identification of the market transfer of catch (and sea turtle bycatch) to other regions. This paper exploits the fact that the vessels in the Hawaiian longline fishery sell their catch in the US fresh swordfish market to analyze the pattern of changes in US fresh and frozen swordfish consumption both before and after the closure regulation was imposed. The mechanisms by which any unintended consequences on endangered sea turtles in other fishery locations in the world are shown to take place through the US swordfish market. At the estimated annual market transfer, a bootstrap analysis of the probability distribution of bycatch rates indicates that the regulation led to an additional 2882 sea turtle interactions at the sample means.     

JZ9-3油田水质对聚合物3640C溶液黏度的影响分析

实验研究了JZ9-3油田的3种水质（水源水、污水、清污混合水）对聚合物溶液剪切前后黏度的影响。结果显示：在相同浓度条件下,清污混合水配制的聚合物溶液黏度最高,其次是污水配制的聚合物溶液,水源水配制的聚合物溶液黏度最低;聚合物溶液经WARING搅拌器（1档3 500 rpm,20 s）剪切后的黏度保留率数据显示,污水配制的聚合物溶液剪切后黏度保留率最高,当浓度大于1 000 mg/L时,保留率在90%左右;最低的是水源水配制的聚合物溶液,保留率在55%左右。分析发现二价阳离子除了对聚合物溶液的黏度存在一定的影响外,对聚合物溶液剪切后的黏度保留率影响更大。     

Cohesive strength and seismogenic stress pattern along the active basement faults of the Precordillera-Sierras Pampeanas ranges, western Argentina: An experimental analysis by means of numerical model

A two-dimensional finite element method （FEM） model that incorporates faults, elastic rock physical properties, topographical load due to gravity and far-field plate velocity boundary conditions was used to recognize the seismogenic stress state along the fold-and-thrust belt of the Precordillera-Sierras Pampeanas ranges of western Argentina. A plane strain model with nine experiments was presented here to examine the fault strength with two major rock phyical properties： cohesion and angle of internal friction. Mohr-Coulomb failure criterion with bulk rock properties were applied to analyse faults. The stress field at any point of the model was assumed to be comprised of gravitational and tectonic components. The analysis was focused to recognize the seismogenic shear strain concentrated in the internal-cristaline domain of the orogene shown by the modeling. Modeling results are presented in terms of four parameters, i. e., （i） distributions, orientations, and magnitudes of principal stresses （σ1 and σ3）, （ii） displacement vector1 （iii） strain distribution, and （iv） maximum shear stress （τmax） contour line within the model. The simulation results show that the compressive stress is distributed in and around the fault systems. The overall orientation of of σ1 is in horizontal directions, although reorientations do occur within some stress weaker parts, especially subsequent to the faults. A large-scale shear stress is accumulating along the active faults of Tapias-Villicum Fault （TVF）, Salinas-Berros Fault （SBF）, Ampacama-Niquizanga Fault （ANF） and Las Charas Fault （CF）, which could act as local stress and strain modulators to localize the earthquakesoccurrence.