我国国家海洋资源资产负债表编制研究          下载免费PDF全文

贺义雄  岳晓菲  杨铭  胡佳卉  李一平 《海洋开发与管理》2017,34(10):72-76

文章在详述海洋资源资产负债表编制思路的基础上,明确界定海洋资源资产和负债等概念的涵义,结合现有研究成果,采用实物量和价值量分列计量的方式构建我国国家海洋资源资产负债表,以期为摸清海洋资源资产家底和海洋资源管理改革提供支持,并助力完善我国自然资源资产负债表和国家资产负债表的编制。  相似文献   

Biologischer Abbau von 2,4-Dinitrotoluol in einer kontinuierlich betriebenen Versuchsanlage und kinetische Untersuchungen     

L. Heinze  M. Brosius  U. Wiesmann 《洁净——土壤、空气、水》1995,23(6):254-263

Biological Degradation of 2,4-Dinitrotoluene in a Continuous Bioreactor and Kinetic Studies Experimental results on the aerobic biological degradation with complete mineralization of 2,4-dinitrotoluene (2,4-DNT) are presented. A culture of Pseudomonas sp. DNT from Spain and Nishino was used. The degradation was examined with batch cultures for the determination of kinetic and stoichiometric coefficients. Further experiments were carried out with a continuous culture in a fixed-bed reactor with recirculation in order to obtain high degradation rates. The reactor was packed with ceramic Raschig rings (55 mL) and had a liquid reaction volume of 160 mL. The minimal salt media from Spanggord et al. with and without (NH₄)₂S)₄ as nitrogen source was used as substrate. 2,4-DNT was the sole source of carbon and energy. From batch experiments a yield coefficient Y_B/S = (0.30 ± 0.05) g g^?1 was calculated from a mass balance of the elements. This result was confirmed by calculations using literature data. Fitting the experimental data to the Monod equation, μ_max = 0.1 h^?1 and K_S = 0.01…0.03 mmol L^?1 were obtained. It was demonstrated by batch experiments that 2,4-DNT is not only used as the source of carbon and energy but also as the nitrogen source. In the fixed-bed reactor, a degradation of 92…97% was reached with a maximal 2,4-DNT load of 95 mg L^?1 h^?1. The rate of continuous degradation could be described by a pseudo-first-order reaction (k = 9.73 h^?1). The complete mineralization of 2,4-DNT was verified by the measurement of DOC and the formed nitrite and nitrate. The formed nitrite was nitrified simultaneously. It was demonstrated by these experiments that large scale biological treatment of industrial effluent containing 2,4-DNT may be successful.  相似文献   

论区域发展战略     

杨开忠 《地理研究》1994,13(1):9-15

本文以新中国伟大实践为源泉,以发展中国家区域发展三种主要方法进行了系统的理论分析和讨论。作者区别出极端和温和的不平衡方法,消极和积极的一体化方法;主张发展中国家抛弃不平衡和平衡发展方法,采取和实行政府积极干预的一体化方法。  相似文献   

牧草地土壤水分的动态平衡计算     

申双和  张山青 《气象科学》1995,15(3):254-261

根据土壤水分平衡方程、利用甘肃省西峰逐日气象资料，牧草生长发育资料和土壤水分观测资料，对水分平衡中的入渗分量进行适当修正，建立了牧草地土壤水分动态模拟模型，获得一些有意义的参数值，根据预报试验表明，只要正确估计模型中的参数，该模型要以结合对未来气象要素的预报用于预测牡草地土壤水分动态，为旱地草场水分管理提供必要的手段。  相似文献   

波向对变风向的响应   总被引：1，自引：0，他引：1  

李陆平  龚滨 《中国海洋大学学报(自然科学版)》1991,(3)

由能量平衡方程导出匀质波场局地风生浪平均波向对变风向的响应。结果表明,响应的时间尺度不但取决于波能的成长速率,还取决于方向分布函数和风向与平均波向之夹角。按文圣常提出的在局地风作用下的标准风浪成长曲线,对其响应时间尺度的定量估计结果表明,本文提出的无因次响应时间尺度与无因次能量和无固次峰频率的关系,与现已提出的模式比较与实测更符合。  相似文献   

关于YZ-Ⅲ型遥测波浪仪浮标的设计     

李世山  陆蔼庆  曹洁玉  于新生 《海洋科学》1989,(4)

本文论述了YZ-III型遥测波浪仪测波浮标的总体及结构设计。该测波浮标在结构上具有即可定点系留使用,也可以随船使用的特点。垂摆式的自平衡系统,具有独特的结构形式和良好的随动性能。本文还论述了浮标的随波性能及浮标的系留方式。浮标升沉达到随波状态时的周期不大于1.03s。在强流区定点系留浮标时,作者建议采用一种有助于克服强流影响的系留方式。  相似文献   

基于Janbu法的边坡稳定性研究   总被引：3，自引：0，他引：3  

罗建鸿  张国林  李瑞琪 《云南地质》2010,29(2):228-230

通过对边坡稳定性数值分析研究,推导Janbu法求解边坡安全系数的计算过程,并用该法计算云南映象北金大道中的边坡安全系数,取得较理想的结果。  相似文献   

Topographic radiation balance models: Sensitivity and application in periglacial geomorphology     

《Norsk geografisk tidsskrift. Norwegian journal of geography》2012,66(4):203-211

Direct solar radiation integrated over one year is a function of latitude and time of year, and topographic slope , aspect and shadowing control the local distribution. Recently, several spatial models have been developed which estimate the radiation balance based on digital elevation models, taking into account aspect, slope and shadowing effects. For the periglacial realm, these models are integrated both in models estimating possible occurrence of mountain permafrost and in studies of active layer dynamics. In this article our aim is to assess and discuss sensitivity and validations of the radiation balance model SRAD, in comparison with two other topographic-based radiation models. The study site and field data are from Finse, Southern Norway.  相似文献   

Beyond false balance: How interpretive journalism shapes media coverage of climate change     

《Global Environmental Change》2017

This study explores two pre-eminent features of transnational media coverage of climate change: The framing of climate change as a harmful, human-induced risk and the way that reporting handles contrarian voices in the climate debate. The analysis shows how journalists, and their interpretations and professional norms, shape media debates about climate change. The study links an analysis of media content to a survey of the authors of the respective articles. It covers leading print and online news outlets in Germany, India, the United Kingdom, the United States, and Switzerland. It finds that climate journalism has moved beyond the norm of balance towards a more interpretive pattern of journalism. Quoting contrarian voices still is part of transnational climate coverage, but these quotes are contextualized with a dismissal of climate change denial. Yet niches of denial persist in certain contexts, and much journalistic attention is focused on the narrative of ‘warners vs. deniers,’ and overlooks the more relevant debates about climate change.  相似文献   

机井开采对月牙泉水位的影响及应对措施     

施锦  王建红 《地下水》2014,(6):57-58

通过对月牙泉周边区域的水量均衡计算范围、地下水水位监测孔的水位年内变化及牙泉水位下降过程的分析,明确对月牙泉水位产生影响的机井开采区,提出关闭合水村和鸣山村及敦煌城市自来水厂、七里镇自来水厂机井。共关闭机井155眼,减少年开采量1 297.8万/m^3,以应对月牙泉的水位因机井开采而持续下降的问题。  相似文献