我对储量分类中[三维框架]的理解     

田绍东 《山东国土资源》2009,25(7):59-59

目前，专家对怎么修订和完善《固体矿产资源／储量分类》意见尚不统一。但基本认同在保持联合国分类框架（亦即我国1999年的分类框架）的基础上进行调整，即对地质轴和可研轴可基本维持原状，主要是对经济轴进行调整。笔者认为，国际分类和我国的分类其核心都是三维框架，但是对三维框架的理解是不一致的，笔者的理解是：  相似文献   

巢北地区中志留统坟头组沉积相与古环境研究     

李德平  韩宗珠  李安龙  衣伟虹 《海洋湖沼通报》2010,(3)

中志留统坟头组在巢北地区出露广,层位稳定,岩性主要为一套黄绿色中层状石英细砂岩、黄绿色粉砂质泥岩、石英砂岩、杂色薄层粉砂岩、粉砂质泥岩和岩屑砂岩,其中黏土含量较高。本文在2007年7月所测巢湖7410工厂——甘露寺剖面及野外观察的基础上,综合室内手标本观察描述、薄片镜下系统鉴定、粘土矿物差热分析及X射线衍射等工作,探讨中志留统坟头组沉积相和古环境特征。中志留统坟头组形成于温湿的弱碱性环境,经历1次大规模海退和1次不完整海侵过程,主要包含三种沉积相类型,按发育时间顺序为:潮控陆棚相、陆棚相和潮坪相。  相似文献   

便携式潮汐预报仪的开发与研究          下载免费PDF全文

张淑娟  李海森  么彬  陈宝伟  周天 《海洋测绘》2010,30(3):59-61

讨论了一种便携式潮汐预报仪的开发与实现。其内部集成嵌入式μC/OS-Ⅱ实时操作系统以及潮汐预报软件,能够根据用户需要实时计算待测港口的潮位信息。将预测数据与实测数据进行比对,说明本系统与传统纸质潮汐表及微机版电子潮汐预报仪相比,具有便携、使用方便、预测精度高等优点。  相似文献   

多时相影像的典型区农作物识别分类方法对比研究   总被引：8，自引：0，他引：8  

彭光雄  宫阿都  崔伟宏  明涛  陈锋锐 《地球信息科学学报》2009,11(2):225-230

基于甘蔗和玉米的物候特征差异,对多时相影像典型分类方法处理的适宜性和准确性进行了比较研究。并以目视解译结果作为参考数据,利用全样本检验法,对自动分类的结果进行了精度检验。试验结果表明:面向对象法的分类精度最高,总体Kappa系数为0.655,是最适宜的方法;其次是BP神经网络法和光谱角制图法,总体Kappa系数分别为0.635和0.631;而最大似然法和分类后比较法则是不适宜采纳的分类方法,总体Kappa系数分别为0.601和0.577。上述分析可见,它们对遥感分类处理多时相影像识别算法的适用性选取有一定参考意义。  相似文献   

Application of rotifer Brachionus plicatilis in detecting the toxicity of harmful algae     

颜天  王云峰  王丽平  陈洋  韩刚  周名江 《中国海洋湖沼学报》2009,27(2):376-382

The toxicity of seven major HAB (harmful algal bloom) species/strains, Prorocentrum donghaiense, Phaeocystis globosa, Prorocentrum micans, Alexandrium tamarense (AT-6, non-PSP producer), Alexandrium lusitanicum, Alexandrum tamarense (ATHK) and Heterosigma akashiwo were studied against rotifer Brachionus plicatilis under laboratory conditions. The results show that P. donghaiense, P. globosa, P. micans, A. tamarense (AT-6), or A. lusitanicum could maintain the individual survival and reproduction, as well as the population increase of the rotifer, but the individual reproduction would decrease when exposed to these five algae at higher densities for nine days; H. akashiwo could decrease the individual survival and reproduction, as well as population increase of the rotifer, which is similar to that of the starvation group, indicating that starvation might be its one lethal factor except for the algal toxins; A. tamarense (ATHK) has strong lethal effect on the rotifer with 48h LC₅₀ at 800 cells/mL. The experiment on ingestion ability indicated by gut pigment change shows that P. donghaiense, P. globosa, P. micans, A. tamarense (AT-6) and A. lusitanicum can be taken by the rotifers as food, but A. tamarense (ATHK) or H. akashiwo can be ingested by the rotifers. The results indicate that all the indexes of individual survival and reproduction, population increase, gut pigment change of the rotifers are good and convenient to be used to reflect the toxicities of HAB species. Therefore, rotifer is suggested as one of the toxicity testing organisms in detecting the toxicity of harmful algae. Supported by the Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-YW-208), National Natural Science Foundation of China (No. 40821004, U0733006) and National Basic Research Program of China (973 Program, No. 2001CB409700)  相似文献   

企业地理信息服务内容和框架研究——以“数字烟草”为例   总被引：1，自引：0，他引：1  

梅新  崔伟宏  吴孟泉 《地球信息科学学报》2008,10(5):623-628

地理信息服务是地理信息发展的新阶段,当前的研究工作主要侧重在模式研究,而对于地理信息服务与企业和商业的具体应用研究目前还不多见。烟草行业是我国财政税收的重要来源,"数字烟草"是烟草企业的信息化的新的战略阶段。地理信息服务进入数字烟草将给烟草企业和相关商业带来革命性的变化。本文结合数字烟草论述企业地理信息服务的具体应用内容,并给出了相关的框架设计和应用实例。  相似文献   

Development of a new index for integrating landscape patterns with ecological processes at watershed scale   总被引：12，自引：3，他引：9  

Liding Chen  Huiying Tian  Bojie Fu  Xinfeng Zhao 《中国地理科学(英文版)》2009,19(1):37-45

Understanding the relationship between landscape patterns and ecological processes has been a central yet challenging research theme in landscape ecology. Over the past decades, many landscape metrics have been proposed but few directly incorporated ecological processes. In this paper, we developed a landscape index, namely, location-weighted landscape index (LWLI) to highlight the role of landscape type in ecological processes, such as nutrient losses and soil erosion. Within the framework of the Lorenz curve theory, we develop this index by integrating landscape pattern and point-based measurements at a watershed scale. The index can be used to characterize the contribution of landscape pattern to ecological processes (e.g. nutrient losses) with respect to a specific monitoring point in a watershed. Through a case study on nutrient losses in an agricultural area in northeastern China, we found that nutrient losses tended to be higher for a watershed with a higher LWLI value, and vice versa. It implied that LWLI can be used to evaluate the potential risk of nutrient losses or soil erosion by comparing their values across watersheds. In addition, this index can be extended to characterize ecological processes, such as the effect of landscape pattern on wildlife inhabitation and urban heat island effect. Finally, we discuss several problems that should be paid attention to when applying this index to a heterogeneous landscape site.  相似文献   

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田颜锋  李姗姗  刘晓刚  付国峰 《大地测量与地球动力学》2009,29(6):130-132

???????????????????o???????????????????????FIR??????????????????????????FIR????????????о??????????λ?????????????????????????????????????????????о?????????????????????任?е????Ч???  相似文献   

成武县节约集约用地破解用地难题     

张志胜  刘统亮  田国强 《山东国土资源》2007,23(6):2007/5/10-2007/6/13

成武县土地总面积988．21km^2，总人口63万，耕地面积70683．72hm^2，近年来，随着招商引资力度的加大，土地需求量直线上升，土地供需矛盾日益突出。为此，成武县国土资源局党组多次召开会议进行研究，加强政策学习，不断更新用地观念，科学决策，着力盘活存量，内涵挖潜，走节约集约用地之路，努力寻找破解制约经济发展“瓶颈”的良策妙方，积极拓宽经济发展空间，保障了建设用地需求，走出了一条节约、集约用地，促进经济发展的新路子。  相似文献   

边坡岩体质量分类体系的CSMR法及应用   总被引：7，自引：0，他引：7  

李胜伟  李天斌  王兰生 《地质灾害与环境保护》2001,12(2):69-72

详细、系统地介绍边坡岩体质量评分类的CSMR法，并结合西南某水电站进水口边坡工程的实例，讨论运用CSMR系统进行边坡岩体质量分类的改进意见。实践证明，此法具有简便性和可行性，值得进一步推广。结合工程实践，并指出此法的不足之处。  相似文献