共查询到20条相似文献，搜索用时 812 毫秒
1.
地勘单位要吸引和留住人才,就要在事业、感情、待遇留人上下功夫.即营造鼓励人才干成事业、帮助人才干好事业、创造施展才华的社会氛围和环境;用来自领导的关心爱护之情,同事的团结友爱之情来拴住人心;为人才提供与其创新能力和贡献相适应的物质待遇,使人才充分享有实现自身价值的自豪感、贡献社会的成就感、得到社会承认的荣誉感. 相似文献
2.
基岩裂隙水探寻是一项意义重大的研究课题,富水优势断裂的确定是其中的关键。文章详细论述了运用层次分析法寻找富水优势断裂并进行分级的实施方法。这一方法的实施可归纳为"两个前题条件,五个分析步骤,一个结果判断",两个前题条件为富水性功能分类和构建优势指标体系,五个分析步骤为构建层次分析结构模型、构造判断矩阵、层次单排序及其一致性检验、层次总排序、对象层权重总排序;一个结果判断为利用层次分析的结果进行断裂富水性分级,从而最终确定出富水优势断裂。此法为富水优势断裂的定量化评价提供了一种简洁、实用的新方法。 相似文献
3.
《International Geology Review》2012,54(11):1042-1050
Minerals of the stibnite-antimonselite series, in close association with tiemannite, clausthalite, kullerudite, Se-bearing stibioluzonite, native gold, quartz, and barite, were discovered in Cambrian stratabound gold deposits at La'erma and Qiongmo, western Qinling, China. Based on S/(S + Se) ratios of microprobe analyses, the binary stibnite-antimonselite system is divided into four series: stibnite, Se-stibnite, S-antimonselite, and antimonselite. Micro-hardness of the stibnite series (Sb = 58.47 to 72.99 wt%, S = 11.86 to 28.76, and Se = 0.00 to 29.12) and the antimonselite series (Sb = 48.94 to 59.13 wt%, Se = 29.20 to 46.86, S = 1.99 to 11.43) is 101.26 and 103 kg/mm2, respectively. Representative reflectivities of the four series are (470 nm) Rg'= 42.62 to 47.62%, Rp' = 30.83 to 40.55%; (550 nm) Rg' = 41.84 to 46.75%, Rp'= 31.48 to 38.85%; (590 nm) Rg' = 42.25 to 46.63%, Rp' = 30.73 to 39.46%; (650 nm) Rg' = 43.30 to 46.48%, Rp' = 30.01 to 41.56%. Cell parameters obtained from two stibnite samples (containing 3 to 5% Se) are a = 1.1209 to 1.1212 nm, b = 1.1299 to 1.1303 nm, c = 0.3847 to 0.3849 nm; and those of S-antimonselite and antimonselite are a = 1.1591 to 1.1593 nm, b = 1.1724 to 1.1747 nm, and c = 0.3941 to 0.3984 nm. 相似文献
4.
三江地区含锡花岗岩Rb—Sr等时线年龄 总被引：7，自引：1，他引：7
通过含锡花岗岩全岩Rb-Sr等时线年龄研究,哀牢山-金沙江锡矿带的含锡花岗岩形成于燕山中晚期(133～80Ma);临沧-左贡锡矿带的年龄范围648～370Ma,相当于徵江期到海西期;潞西-腾冲锡矿带,属于燕山晚期到喜山期(105～51Ma)。 相似文献
5.
Landslide risk: some issues that determine societal acceptance 总被引：2，自引：1，他引：1
This paper illustrates approaches to landslide risk acceptance in various parts of the world in the context of the willingness to accept that risk, the willingness to pay to reduce the risk, and the willingness to alter the environment in the process. These factors are interlinked using the ternary ??willingness diagram?? which is also used to demonstrate how such willingness may change over time and to compare a range of generic approaches to landslide remediation as well as different conceptual approaches to landslide risk management. The willingness construct is intended to provide a readily understood framework for infrastructure owners and operators, amongst others, to understand how their approach to risk management compares with those in other regions, countries and contexts. Issues relevant to the response of society and groups of individuals to landslide risk, its acceptance and management include cultural factors, regulation and planning, budgetary constraints, vehicular vulnerability, and the often limited size of the event footprint compared to the vulnerability shadow that is cast are also discussed. 相似文献
6.
典型岩溶流域土地整理的生态评价——以云南小江流域为例 总被引：2，自引：0，他引：2
以云南小江典型岩溶流域为例,在GIS支持下,通过选择评价因子和建立评价模型对岩溶区的土地整理进行了生态评价。结果表明: 流域生态评价分值较高的土地面积较少,而生态评价分值较低的土地面积较大。分值在80～ 100的土地整理主要任务是在保护生态环境质量和耕地数量的前提下,加快流域经济结构的调整,提高土地利用的经济效益;分值在70～ 80的土地整理主要任务是耕地数量保护和质量保护并重,提高土地的生产能力,提高经济效益,同时防止水土流失及化肥、农药施用对地下水造成的非点源污染; 分值在60～ 70的土地整理主要任务是着重于生态环境的保护和重建以及立体农业的综合开发; 分值在60以下的土地整理主要任务是土地石漠化的治理。 相似文献
7.
湖南省探矿权、采矿权市场现状与发展对策 总被引：1，自引：0，他引：1
探矿权、采矿权市场是社会主义市场经济的重要组成部分．培育和规范探矿权、采矿权市场不仅是实现矿产资源利用方式和管理方式转变的根本途径，更是推动矿业经济全面开放。走向健康有序发展的强大动力．湖南省的探矿权、采矿权市场还不发育，与我国市场体制的发展进程和其他各类市场的建设进程相比，很难适应入世的需要．在对湖南省探矿权、采矿权市场现状进行深入分析的基础上，提出了解放思想、整顿秩序、明确政策、加强勘探。严格规划、加强领导等项措施来培育和规范我省探矿权、采矿权市场． 相似文献
8.
Nutrient loading to estuaries with heavily populated watersheds can have profound ecological consequences. In evaluating policy
options for managing nitrogen (N), it is helpful to understand current and historic spatial loading patterns to the system.
We modeled N inputs to Narragansett Bay from 1850 to 2000, using data on population, human waste disposal, livestock, fertilizer,
and atmospheric deposition. We found that total N loading to the bay increased 250% from 1850 to 2000, and 80% from 1900 to
2000. Loading to the upper bay increased far more than that to the lower bay, and the most important source shifted from non-point
animal waste to human waste concentrated at sewage treatment facilities. We also modeled future N loads in 2015 under four
management scenarios. Planned improvements in sewage treatment would reduce N loads 9% below business-as-usual, to the 1990
loading rate. Greater reductions, to circa 1900 rates of loading, may be possible. 相似文献
9.
湿陷性黄土增湿和减湿效应的探讨 总被引：1，自引：0，他引：1
湿陷性黄土的湿陷性不是一成不变的。土中含水率的变化产生的增湿和减湿效应,对黄土湿陷性影响很大。进行黄土湿陷性评价时,应注意以动态的观点和方法综合分析、预测增湿和减湿效应的不利影响,以便采取有效的处理措施,消除工程事故隐患。 相似文献
10.
ZHUANG Yi-ming LIU Ying-xin LI Hai-yan SUN Pei-lin ZHAO Fu-you Coal Field Geology Bureau of Jilin Province Changchun China 《吉林大学学报(地球科学版)》2006,(Z2)
高分辨率地震采集数据是构造解释和砂体预测的基础资料,其保真程度的高低直接影响到小构造和砂体预测的准确性。震源的激发、波的传播、检波器的接收和仪器记录各个环节对地震信息的保真度都有影响,地震采集每个环节的分析、研究对提高地震信息的保真度具有重要意义。 相似文献
11.
Pile load tests are used to refine designs and for quality assurance. They can also be used to verify the reliability of piles and pile groups. Stochastic methods have previously been developed to verify the reliability of single piles. A general stochastic method to verify the reliability of pile groups is developed in this paper. The method can be used to assess the reliability of groups where pile tests have been conducted to the ultimate capacity, to below the ultimate capacity but exceeding specified capacity, and where pile tests fail to achieve the specified capacity. In the latter case, the method allows decisions to be made as to whether the reliability of the entire pile group is satisfactory or whether additional piles need to be installed. 相似文献
12.
Reforming Watershed Restoration: Science in Need of Application and Applications in Need of Science 总被引：2，自引：0，他引：2
Margaret A. Palmer 《Estuaries and Coasts》2009,32(1):1-17
Coastal and inland waters are continuing to decline in many parts of the world despite major efforts made to restore them.
This is due in part to the inadequate role that ecological science has played in shaping restoration efforts. A significant
amount of fundamental ecological knowledge dealing with issues such as system dynamics, state changes, context-dependency
of ecological response, and diversity is both under-used by managers and practitioners and under-developed by ecologists for
use in real-world applications. Some of the science that is being ‘used’ has not been adequately tested. Thus, restoration
ecology as a science and ecological restoration as a practice are in need of reform. I identify five ways in which our ecological
knowledge should be influencing restoration to a far greater extent than at present including a need to: shift the focus to
restoration of process and identification of the limiting factors instead of structures and single species, add ecological
insurance to all projects, identify a probabilistic range of possible outcomes instead of a reference condition, expand the
spatial scale of efforts, and apply hierarchical approaches to prioritization. Prominent examples of restoration methods or
approaches that are commonly used despite little evidence to support their efficacy are highlighted such as the use of only
structural enhancements to restore biodiversity. There are also major gaps in scientific knowledge that are of immediate need
to policy makers, managers, and restoration practitioners including: predictive frameworks to guide the restoration of ecological
processes, identification of social-ecological feedbacks that constrain ecosystem recovery and data to support decisions of
where and how to implement restoration projects to achieve the largest gains. I encourage ecologists to respond to the demand
for their scientific input so that restoration can shift from an engineering-driven process to a more sustainable enterprise
that fully integrates ecological processes and social science methods. 相似文献
13.
Aquifer remediation for a contaminated site is complex, expensive, and long-term. Groundwater modelling is often used as a tool to evaluate remedial alternatives and to design a groundwater remediation system. Groundwater modelling can also be used as a useful process to identify aquifer characteristics and contaminant behaviour that are not realized prior to modelling, to help diagnose what happened and why it happened at contaminant sites. Three real-world modelling cases are presented to demonstrate how groundwater modelling is applied to help understand contamination problems and how valuable the improved understanding is to decision-making and/or to remedial design. 相似文献
14.
在试验室进行裂纹稳定扩展及非稳定扩展的研究,其试验基座以楔形劈裂试验为基础改良而成,考虑材料的均质性,试验试体采用供铺设地板或建筑用外墙之天然石材。试验过程中利用裂缝应变片即时记录系统求出试体在稳定扩展及非稳定扩展下的裂纹扩展速度及其分形特性。结果表明,稳定扩展速度范围约在0.113～313.043 cm/s;非稳定扩展速度范围约在0.094～2 489.816 cm/s;亚临界分形维数范围约在0.994 3～1.036 6;起裂断裂韧性范围约在1.891 5～3.500 1 MPa?m1/2;分形亞臨界斷裂韌性范围约在2.063 6～3.712 8 MPa?m1/2。 相似文献
15.
The aim of this article is to investigate a possible way to improve ambient noise tomography by expanding the data base of useful cross-correlation measurements. We show that the curvelet transform makes it possible to compute synthetic noise correlations by simulating directly seismic ambient noise using the spectral element method. These synthetic correlations can in turn be used to identify surface waves and overtones even on correlations having a signal to noise ratio much lower than one. We hope that the possibility to compute SEM synthetic correlations and to extract more information from correlations will be useful to improve ambient noise tomography and monitoring. 相似文献
16.
本文在总结地质找矿实际事例基础上,论证了在地质找矿中思维导向的意义和作用,并就如何运用已知推测未知、从个性抽象出共性再依据共性去认识个性、由表象深入到本质的辨证思维方法等问题进行了具体分析,其目的在于提高人在地质找矿实践中的自觉能动性,避免找矿思维的误导,更有效地开发矿产资源。 相似文献
17.
针对碳酸盐岩薄储层气藏预测受制于地震分辨率,用常规反演方法往往很难解决薄储层气藏预测问题,通过参数加权综合法研究,从地震信息中提取薄储层5大类共计35种地震波场特征参数,通过Karhune—Loeve变换压缩降维,采用广义线性分类判别及加权综合处理,可获得能反映薄储层气藏特征的综合参数,较好地解决薄储层气藏预测的难题。在实际推广应用中也见到了良好的效果．如四川同福场构造嘉陵江组嘉二^1气藏为一典型碳酸盐岩薄储层气藏,储层纵向上厚度较薄,一般有效储层厚度多为1m～3m,曾采用地震速度反演方法做过多轮储层预测,但因储层测井差异性特征不明显以及储层太薄等因素,预测效果均不理想,而采用地震参数综合法则较好地解决了本区薄储层气藏的预测难题,预测符合率达到95．5％。 相似文献
18.
An example of high-pressure low-temperature metamorphic rocks from an island-arc: the Paikon Series (Innermost Hellenides, Greece) 总被引：1，自引：0，他引：1
Abstract The Paikon Series is considered to be a volcanic arc sequence with a mainly neritic sedimentary sequence and bimodal tholeiitic volcanism of early Mesozoic age. The metamorphic assemblages are syn- to post-kinematic with respect to a pre-Tithonian tectonic phase and range from the lawsonite-chlorite-albite facies through transitional Na-amphibole-greenschist facies to the chlorite sub-zone of the greenschist facies. The metamorphic imprint of the Paikon Series corresponds to a temperature range from less than 330° C to ± 450° C under a total pressure from 3 kbar to 6–7 kbar. The overprinting of these facies on an earlier blueschist assemblage, related either to a subduction zone or to a tectonic overpressure caused by thrusting, is suspected. 相似文献
19.
20.
Chris King 《Geology Today》2006,22(6):227-231
In the UK, the National Science week aims to bring exciting science to the public. As explained on the British Association (BA) website: 'National Science Week aims to celebrate science and its importance to our lives, giving people from everywhere in the UK the chance to participate in science activities and experiments and to engage in science discussions in their local area. … We encourage individuals and organisations to take part …' The Prime Minister has said: 'National Science Week is so important. It encourages people to engage with science through informative and fun events, and provides scientists with an opportunity to talk to people about their research and gain an understanding of the public's views.' Science Week provides a wonderful opportunity for geoscientists to bring their science to the public in ways that will inform and inspire. It takes a day, some preparation, and a willingness to 'be in the front line' of interaction with people of all ages. It needs an engaging jargon-free approach and activities that will 'draw in the punters' and provide them with experiences that they won't easily forget. This article shows ways in which it can be delivered. 相似文献