基于锂离子电池储能技术的便携式钻机研制与应用          下载免费PDF全文

谭春亮  渠洪杰  彭新明  卢倩  张沁瑞  岳永东  苏兴涛  祝强 《探矿工程》2021,48(S1):361-365

锂离子电池作为现代文明中重要的能量载体被广泛且大量地使用。浅层钻探是一种重要的浅表层调查取样手段,将锂离子电池储能技术应用于便携式钻机的研发,可解决山区、林草区等特殊地貌区防火期内调查取样的难题,实现浅钻调查零碳排,助力绿色勘查发展;本文重点介绍了锂电池电动钻机的技术参数、特点及试验情况,该机型具有体积小、质量轻、无噪音、无污染,主要钻进参数可显示、可调控,钻进数据可采集、可存储等特点,锂离子电池储能技术在便携式钻机中的应用为浅钻装备数字化、信息化和智能化发展奠定了基础。  相似文献   

煤炭地质勘查产业转型发展的思考与探讨     

谢辉  段中会  贺丹  杨长健  周恩堂 《中国煤炭地质》2021,(2)

煤炭地质勘查工作关系国家能源安全,在国民经济发展中具有重要的战略地位。伴随煤炭行业绿色转型和新能源革命新形势,及时调整产业结构,向大地质、大资源、大生态方向拓展服务领域,为国家生态文明建设和煤炭产业绿色安全高效发展提供坚实的地质技术保障,成为煤炭地质勘查产业转型发展必然趋势和未来发展方向。结合煤田地质勘查工作发展历程及现状、发展趋势,对煤炭地质勘查产业转型发展方向进行深入剖析和探讨。  相似文献   

Macroscopic criteria for Green type porous materials with spheroidal voids: application to double porous materials          下载免费PDF全文

W. Q. Shen  J.‐F. Shao  D. Kondo 《国际地质力学数值与分析法杂志》2017,41(13):1453-1473

Combined effects of matrix plastic compressibility and void shape are investigated for ductile porous materials. To this end, a spheroidal volume containing a confocal spheroidal (prolate or oblate) void subjected to uniform strain rate boundary conditions has been first studied. A Green type matrix is chosen as a prototype for investigating effects of plastic compressibility. This is carried out by using a kinematics limit analysis theory from which a closed‐form expression of the macroscopic criterion is established for the considered class of materials. These results are then extended to ductile porous materials made up of a green matrix containing randomly oriented spheroidal voids. In the framework of a two‐step homogenization procedure, the obtained results are implemented to describe the macroscopic behavior of double porous materials involving spherical voids at the microscale and randomly oriented and distributed spheroidal voids at the mesoscale. For validation purpose, the new derived criteria are assessed and validated by comparing their predictions to available upper bounds and numerical data from literature. Copyright © 2017 John Wiley & Sons, Ltd.  相似文献   

长江口地区绿色颗粒的矿物学研究   总被引：1，自引：0，他引：1  

张桂甲  孙和平等 《矿物学报》1991,11(1):39-44,T005,T006

本文对长江下游河道、长江口现代沉积区、口外残留砂沉积区及大陆架现代沉积区表层沉积物中的绿色颗粒进行了系统的矿物学研究。特别运用透射间和能谱分析对其内部超微结构、单晶结构和单晶化学组成进行了研究。长江口地区的绿色颗粒从宏观形态上可分为三类：颗粒状、书页状和生物状，不同的形态者，其形成机制基本相同，只是微晶聚集的微空间环境不同。绿色颗粒的颜色和成熟度有较密切的关系，颜色愈深，K和Fe含量愈高。其成熟度也愈高，K2O含量为3－7％，仅少数可达8.5％。绿色颗粒主要矿物成分为海绿石、鲕绿泥石、磁绿泥石和蒙4皂石。其中以海绿石为主，因此是一种复合型绿色颗粒。不同形态及不同沉积亚环境中绿色颗粒的矿物成分并无太大差别。  相似文献   

绿色招商与县域经济可持续发展——以河南省为例   总被引：1，自引：0，他引：1  

杨延哲  张教平  李世杰  董冰 《地域研究与开发》2007,26(5):38-41

以河南省县域经济发展为例论述了招商引资对于县域经济发展的重要性,并从可持续发展的角度对当前全民招商的现象进行了反思.在此基础上,讨论了绿色招商的内涵和主要原则,指出绿色招商和循环经济是实现县域经济可持续发展的关键所在.根据县城经济发展的特点,以河南省新郑市和义马市循环经济发展为例,从理论和实证的角度,对县域农业和工业循环经济两大体系构建进行了论述,并对县域绿色招商中应注意的问题,如市场有效性、招商载体构建、实体虚拟产业循环结合等进行了探讨.  相似文献   

The impact of geographical indication on the revitalisation of a regional economy: a case study of 'Boseong' green tea   总被引：1，自引：0，他引：1  

Jeongwook Suh  Alan MacPherson 《Area》2007,39(4):518-527

Geographical indications are legal signs which identify a good as originating in a specific country or region, where the reputation of the product is attributable to its geographical roots. South Korea has operated with a geographical indication system since 1999. This research analyses the regional impacts of geographical indications using the case study of 'Boseong' green tea. The results show that geographical indication has enhanced the image of the product, leading to increased production and the stimulation of tea-related industries. We argue that geographical indication can be used as an effective policy to cope with trade liberalisation.  相似文献   

Direct effects of Daphnia-grazing, not infochemicals, mediate a shift towards large inedible colonies of the gelatinous green alga Sphaerocystis schroeteri     

Heike Kampe  Marie König-Rinke  Jürgen Benndorf 《Limnologica》2007,37(2):137-145

The influence of Daphnia galeata×hyalina grazing and of infochemicals released by the daphnids on the colony size and growth rate of the colonial gelatinous green alga Sphaerocystis schroeteri (Chlorococcales) was investigated in laboratory batch experiments run for 96 h. High zooplankton grazing pressure was exerted by a final concentration of 100 daphnids L⁻¹ in the Daphnia treatments. Infochemicals were obtained by filtration (0.2 μm) of water from D. galeata×hyalina cultures (200 ind. L⁻¹ exposed for 24 h). This filtrate was added to the S. schroeteri cultures in two concentrations corresponding to 7 and 50 daphnids L⁻¹, respectively. The growth rate of S. schroeteri was neither affected significantly by direct Daphnia grazing nor by the presence of Daphnia infochemicals, in comparison to the control. However, the portion of inedible S. schroeteri colonies (diameter>50 μm) increased under direct grazing pressure, whereas the Daphnia infochemicals did not influence the colony size significantly. We conclude that the shift in colony size by direct zooplankton grazing denotes an effective defence mechanism against size selective feeding for colonial gelatinous green algae. This effective defence in combination with unchanged growth rates of the larger colonies (under non-limiting nutrient and light conditions) falsifies the assumption of a trade-off between minimising grazing losses and maximising growth by optimising the colony size.  相似文献   

和田玉、玛纳斯碧玉和岫岩老玉的产地特征   总被引：7，自引：2，他引：7  

邹天人  陈克樵 《岩石矿物学杂志》2002,21(Z1):41-49

本文用电子探针研究了和田玉、玛纳斯碧玉和岫岩老玉的矿物成分,结果表明和田玉的主要矿物成分是透闪石,玛纳斯碧玉是阳起石,而岫岩老玉则由透闪石和阳起石组成,并论述了它们的产地特征.  相似文献   

绿片岩力学性质的实验研究     

顾芷娟  潘裕生  周勇  陶京玲  刘成龙 《现代地质》2001,15(4):450-452

绿片岩的力学实验表明 ,在围压 45 0MPa条件下 ,岩石约于 45 0℃开始塑性变形。温度升至 5 5 0℃时变形加剧 ,原来直径为 10mm、高 2 0mm的均匀圆柱体变成直径为 10 8mm、高 17 4mm、中部变粗的不规则柱体。这一结果为解释青藏高原的地壳加厚提供了一定的实验依据  相似文献   

航空遥感在佛山城市空间环境质量评价中的应用     

赵滔滔 《四川测绘》1996,19(3):116-119

本文主要介绍利用佛山市航空遥感综合调查资料分析城市环境的空间结构，建立了空间结构分类系统，探讨了城市形态的变化，综合评价城市空间环境质量，并提出一些改善环境质量的建议．  相似文献