澳大利亚批准加拿大Cameco铀矿项目

<正>近日,西澳大利亚环境保护署完成对加拿大Cameco-Mitsubishi公司提交的Kintyre铀矿项目评估,并建议在一定条件下批准该项目。澳环保机构相关负责人表示,Kintyre项目位于西澳的东皮尔巴拉地区,靠近Karlamilyi国家公园。只要Cameco公司密切监控并评估该项目对附近植物和动物的潜在辐射影响,便可进一步开展该项目。     

Marine bacterium strain screening and pyrethroid insecticide-degrading efficiency analysis

A pyrethroid insecticide-degrading bacterium, strain HS-24, was isolated from an offshore seawater environment. The strain, which can degrade cypermethrin(CYP) and deltamethrin(DEL), was identified as Methylophaga sp. The optimal culture and degradation conditions for CYP and DEL by strain HS-24 is pH 7 at 28°C. Under optimum culture conditions, strain HS-24 exhibited a broad degradation concentration range of 100, 200, 400, 600, and 800 mg/L for CYP and DEL. The metabolic intermediates were analyzed by NMR, which provided strong evidence that CYP and DEL removal occurred mainly because of a biological process. The toxicity of the degradation products of strain HS-24 was studied simultaneously by measuring the light output of the luminescence bacterium. This demonstrated that the biodegradation ability of strain HS-24 significantly decreased the toxicity of CYP- and DEL-contaminated aquaculture seawater. Finally, the findings of this paper indicate that strain HS-24 is thus revealed as a biological agent for the remediation of marine aquatic environments.     

辽阳:全力打造群众满意国土新形象

正2014年以来,辽宁省辽阳县国土资源局始终以"资源有限,服务无限"为理念,以保护资源为核心,以保障发展为主题,以维护全县人民权益为宗旨,不断创新工作思路,前移服务阵地,切实提高办事效率和服务质量,更好地服务基层,全力打造群众满意国土新形象。一是盘活低效土地,提高国有土地利用效率。认真落实辽宁省"一区一带"土地改革相关政策,现已争取到国土资源     

郯城:加强设施农用地管理

正近期,为促进农村经济快速发展,提高土地利用效率,山东省郯城县国土资源局积极引导农民依法养殖、集约用地,禁止占用基本农田,规范养殖用地秩序,保证农民养殖用地需求。一是鼓励养殖户利用废弃地、未利用地搞家禽养殖,尽量不占或少占耕地,严禁占用基本农田。     

直驱式波浪能转换系统的研究和性能优化

A direct-drive wave energy conversion system based on a three-phase permanent magnet tubular linear generator （PMTLG） and a heaving buoy is proposed to convert wave energy into electrical energy. Sufficient experimental methods are adopted to compare the computer simulations, the validity of which is verified by the experiment results from a wave tank laboratory. In the experiment, the motion curves of heaving buoy are with small fluctuations, mainly caused by the PMTLG＇s detent force. For the reduction of these small fluctuations and a maximum operational efficiency of the direct-drive wave energy conversion system, the PMTLG＇s detent force minimization technique and the heaving buoy optimization will be discussed. It is discovered that the operational efficiency of the direct-drive wave energy conversion system increases dramatically after optimization. The experiment and optimization results will provide useful reference for the future research on ocean wave energy conversion system.     

A Bingham-plastic model for fluid mud transport under waves and currents

Simplified equations of fluid mud motion, which is described as Bingham-Plastic model under waves and currents, are presented by order analysis. The simplified equations are non-linear ordinary differential equations which are solved by hybrid numerical-analytical technique. As the computational cost is very low, the effects of wave current parameters and fluid mud properties on the transportation velocity of the fluid mud are studied systematically. It is found that the fluid mud can move toward one direction even if the shear stress acting on the fluid mud bed is much smaller than the fluid mud yield stress under the condition of wave and current coexistence. Experiments of the fluid mud motion under current with fluctuation water surface are carried out. The fluid mud transportation velocity predicted by the presented mathematical model can roughly match that measured in experiments.     

Nonlinear optimization method of ship floating condition calculation in wave based on vector

Ship floating condition in regular waves is calculated. New equations controlling any ship＇s floating condition are proposed by use of the vector operation. This form is a nonlinear optimization problem which can be solved using the penalty function method with constant coefficients. And the solving process is accelerated by dichotomy. During the solving process, the ship＇s displacement and buoyant centre have been calculated by the integration of the ship surface according to the waterline. The ship surface is described using an accumulative chord length theory in order to determine the displacement, the buoyancy center and the waterline. The draught forming the waterline at each station can be found out by calculating the intersection of the ship surface and the wave surface. The results of an example indicate that this method is exact and efficient. It can calculate the ship floating condition in regular waves as well as simplify the calculation and improve the computational efficiency and the precision of results.     

基于DEA-SFA型的海洋科技转化成果绩效测评

文章运用DEA-SFA 模型,对2010年我国海洋科技经济效益转化率、海洋科技生态效益转化率和海洋科技学术成果转化率进行了测算。通过第一阶段和第三阶段结果的对比分析,得到文章主要结论：剔除环境因素和随机因素影响的海洋科技转化效率整体有所下降,这说明目前我国海洋科技转化率发展不平衡,未来海洋科技在强调投入增加的同时要考虑人均海洋GDP、建立海洋科研院的数量以及社会综合发展指数的环境因素,整体提升海洋科技转化效率。     

徕卡ADS80数字航空摄影测量系统在大范围矿区空三加密作业中的效率分析

ADS80是全新一代的多功能数字航摄仪,它基于推扫方式的CCD和全球定位系统、高精度的惯性导航系统获取数字影像。本文基于ADS80数码航摄仪讨论了三线阵影像在大范围矿区成图中的应用,总结作业流程及其中的关键问题,并以YC及YL两个测区为例,对少控或无控条件下的ADS80数据进行空三加密,获得了满意的精度,证明了其在大范围和极端地形条件矿区作业过程中具有较高的效率。     

豫煤物测队弯线地震勘探资料处理技术取得新突破

日前,河南省煤田地质局物测队正在施工的新疆乌恰县煤炭资源勘查二维地震项目在天山南麓和昆仑山结合部,山大沟深,地形复杂。采用传统常规直测线二维地震勘探方法施工测线铺设难度大、成孔困难,激发效果差,要完成该项目地质任务有很大困难。该队通过对勘探区细致的踏勘,将测线沿山脚、沟谷等低洼地带布设,采用弯线路径设计,提高施工效率及原始资料采集质量。