Biochemical Mechanism of the Eutrophication and Its Prevention—the Deep Treatment of Waste Water and Its Denitrification and Dephosphorization

Biochemical mechanism of forming the red tide is discussed in this paper.The existence of a large number of nitrates and phosphates in the eutrophic water is the prerequisite of explosive increase of algae and the forming of red tide.Reduction of eutrophication is an important approach to preventing the red tide.The method of deep treatment of the waste water and its denitrification and dephosphorization are introduced,and a new opinion on the red tide formation and fundamental prevention is put forward.     

厄尔尼诺的发生与行星运动

厄尔尼诺(El Ni(?)o)现象是海-气耦合系统异常变化的表现,其起因可能不是唯一的,行星运动对地球运动的影响可能会导致El Ni(?)o的发生。根据4个半世纪内El Ni(?)o发生的历史资料,分析其发生和行星运动的关系,得出的结论是:木星赤纬的变化和火星大冲与El Ni(?)o。的发生有显著的关系,表明这2颗行星的运动可能影响El Ni(?)o的发生。文中还根据分析结桌和El Ni(?)o混沌机制的观点,探讨了行星运动对海-气系统变化的影响机制。     

硬骨鱼类的渗透压调节

生活在淡水或海水中的各种硬骨鱼类,它们体液的渗透浓度是比较接近和稳定的,但它们所生活的外界水环境的盐度却相差很大,鱼类为了维持体内一定的渗透浓度必须进行渗透压调节,鱼类调节渗透压能力的大小,决定了它们对水环境盐度变化的耐受力。研究鱼类的渗透压调节机能对生产实践有一定的指导意义。譬如通过研究     

高精度CTD剖面仪研制过程中的专用设备

本文介绍了“油水分离压力罐”的主要理论依据及该设备采用的特殊的机械结构，实践证明，利用该设备实现了在实验室条件下，模拟深海重力场检测CTD剖面仪中的某些关键传感器的目的。     

南沙西南地区新构造运动及其动力学机制

本文根据南沙西南地区的岩石圈动力学环境，把本区新构造运动类型划分为拉张型，挤压型，平移剪切型和旋动型，并对其构造演化阶段和动力学机制进行了初步分析。     

西藏崩错8级地震地表破裂的变形特征及其破裂机制

1951年11月18日,西藏那曲崩错附近发生了一次8级地震,地表产生了长达约91公里的破裂带。本文总结了该破裂的几何、位移分布特征,讨论了破裂的形成机制和崩错地震的发震构造条件     

不完全信息下房地产开发商联盟合作机制研究

房地产市场中开发企业状况为量多规模小,开发主体之间没有形成规模效应。因此对开发主体之间的联盟合作进行探讨。但在联盟过程中,由于信息不对称,市场机制不完善,使联盟的不稳定性上升和联盟的战略意义得不到体现。因此,分析了房地产开发商联盟中几种形式的不稳定性,运用模型化方法论证了联盟合作机制的设置,并以此为基础总结了合作机制的设置来维持联盟的稳定性。     

浅析库车前陆盆地水文地质条件与铀成矿作用

根据库车前陆盆地水文地质条件,分析了地下水的铀成矿作用,并通过热力学计算等方法,对水中铀的存在形式及铀的溶解、迁移和沉淀富集过程作了较为详细的论述,阐明了盆地水化学及铀水文地球化学环境,并提出了成矿有利地段和有利层位。     

Bottom Simulating Reflector and Gas Seepage in Okinawa Trough： Evidence of Gas Hydrate in an Active Back-Arc Basin

To look for gas hydrate, 22 multi-channel and 3 single-channel seismic lines on the East China Sea (ECS) shelf slope and at the bottom of the Okinawa Trough were examined. It was found that there was indeed bottom simulating reflector (BSR) occurrence, but it is very rare. Besides several BSRs, a gas seepage was also found. As shown by the data, both the BSR and gas seepage are all related with local geological structures, such as mud diapir, anticline, and fault-controlled graben-like structure. However, similar structural "anomalies" are quite common in the tectonically very active Okinawa Trough region, but very few of them have developed BSR or gas seepage. The article points out that the main reason is probably the low concentration of organic carbon of the sediment in this area. It was speculated that the rare occurrence of gas hydrates in this region is governed by structure-controlled fluid flow. Numerous faults and fractures form a network of high-permeability channels in the sediment and highly fractured igneous basement to allow fluid circulation and ventilation. Fluid flow in this tectonic environment is driven primarily by thermal buoyancy and takes place on a wide range of spatial scales. The fluid flow may play two roles to facilitate hydrate formation:to help gather enough methane into a small area and to modulate the thermal regime.     

同位素示踪剂在流域水文模拟中的应用

主要目的是通过对同位素在流域水文模拟应用中的一些假定、限制条件以及方法进行澄清和系统化,从而促进同位素在流域水文模拟中一些新的研究方向和研究热点.主要从三个方面,即同位素流量过程线分割、流域平均滞时与不同水源混合、与水文模型耦合,讨论同位素示踪剂在流域水文模拟中的研究进展情况.同时指出了同位素在流域水文模拟中应用存在的一些主要问题,包括:①降雨同位素含量的时空变化;②不同径流成分的采样;③径流输出同位素含量的空间变化;④流域平均滞时分布函数的确定;⑤水文同位素耦合模型.