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1.
本文基于L-不分明集上的双诱导映射理论,研究了L-Fuzzy模的同态与同构问题,给出了它们的一些有趣性质,并把经典模论中的同态和同构定理推广到L-Fuzzy模上。  相似文献   

2.
本文在L-Fuzzy拓扑空间中考虑层次给出了具有层次特征的α-分离性,讨论了它们的性质,进而在Q-紧空间中得到了与正则、正规性相关的几个结果。  相似文献   

3.
肖正元  黎宏彦 《岩矿测试》1994,13(2):128-130
采用了单柱离子色谱法测MnO2产品中无机离子杂质;提出了消除干扰的可行途径,将La(OH)3加入后能同时消除进样峰的干扰和溶剂峰的出现。选用1.75mmol/L邻苯二甲酸1.75mmol/L三羟甲基氨基甲烷为混合淋洗剂测定F^-,Cl^-,NO3^和SO^2-4,其标准加入回收率为95%-105%;RSD(n=7)为2.47%-8.08%。  相似文献   

4.
报道了P507-pMBP溶剂浸渍滤纸(SIFP)的制备及其吸附性质;提出含微量Zr、Hf的岩矿样品经碱熔分解后用强阳离子交换树脂静态吸附分离大量干扰元素,再用P507-PMBPSIFP富集Zr与Hf,然后用XRF光谱直接测定SIFP上Zr、Hf的方法;考察了阳离子交换树脂分离干扰元素的条件,以及在残留干扰元素存在下P507-PMBPSIFP对Zr、Hf的富集情况等;对分析误差的来源,样品分析的精密度,SIFP样片的稳定性等也进行了讨论;所拟方法经用GSR及GSS系列部分地质标准样品分析验证,其结果与推荐值符合。  相似文献   

5.
预富集柱—离子色谱法测定高纯水中痕量氟和氯   总被引:3,自引:0,他引:3  
辛仁轩  姜镭 《岩矿测试》1997,16(2):150-152
在国产离子色谱仪上加装填充有季铵型阴离子交换剂的预富集柱,所设计的流路和方法可将测定F-和Cl-的检出限分别降至017μg/L和027μg/L。测定精密度好,RSD<5%,方法满足反应堆堆芯冷却水中痕量F-和Cl-的检测要求。  相似文献   

6.
主要研究生成L—Fuzzy子群。首先引入生成L—Fuzzy子群的概念,给出了生成L—Fuzzy子群的代数刻画式:[A](x)=A(x)=∨{[A(%1)∨A(%1)^-1]…∧[A(xn)∨A(xn^-1)],x=x1…xn},任意x∈Co基于L-Fuzzy集上的Zadeh型映射和双诱导映射理论,深入地研究了生成L-Fuzzy子群的若干性质,得到L—Fuzzy正规子群A,B的并A∪B的生成子群仍是L—Fuzzy正规子群,L—Fuzzy子集A的同态映象的生成子群[(fφ)(A)]等于L—Fuzzy子集A的生成子群的同态映象(fφ)[A]等一系列颇有意义的结论。  相似文献   

7.
反向流动注射分析法连续测定氰化物和硫氰化物的研究   总被引:1,自引:0,他引:1  
马惠昌  冯建章 《岩矿测试》1993,12(4):283-286
运用反向流动注射分析法以吡啶-巴比舀酸和Fe(Ⅲ)作为显色剂建立了连续测定CN^-和SC^-的方法,借助于聚四氟乙烯微孔膜分离CN^-和SCN^-,经切换阀实现测定转换。通过优化实验找到了两者连续测定的适宜条件,CN^-和SCN^-的测定范围分别为:5-20mg/L和0-80mg/L.  相似文献   

8.
新疆黄山铜镍成矿带中含镍系列矿物组分特征   总被引:2,自引:0,他引:2  
黄山铜镍成矿带中含镍矿物种类繁多,成分复杂。根据显微镜下鉴定和电子探针成分分析,含镍矿物可分为Fe-Co-Ni-S系列;Fe-Co-Ni-As系;Fe-Co-Ni-As-S系列。由于此类矿物相似的光性较多,本文着重进行了组分特征的研究。  相似文献   

9.
热水溶液地球化学   总被引:8,自引:0,他引:8  
曾贻善 《地学前缘》1996,3(3):89-95
概述了热水溶液地球化学的主要研究内容和近年来在实验和理论研究方面的进展,包括高温高压下水的热力学性质、状态方程式、介电常数、电导率和电离平衡;NaCl-CO2-H2O体系及其边界体系(NaCl-H2O和CO2-H2O)的相关系、热力学性质和状态方程式,特别是利用人工流体包裹体技术和分子动力学模拟取得的新成果;高温高压电解质稀水溶液的电导测定;以HKF模型为基础,热水溶液中不同物种的标准偏摩尔热力学性质和高温高压有关物理化学参数的估算;热水溶液中的物种形成(热液流体中的矿物溶解度测定、电势测量和谱学研究);水和热水溶液结构的红外和拉曼谱学研究;水和热水溶液的传输性质(粘度和导热系数)。  相似文献   

10.
用石墨炉原子吸收光谱(GFAAS)或感应耦合等离子体质谱(ICP-MS)评估了几种预富集天然水中溶解金的方法。在GFASS之前用阴离子交换法和在ICP-MS之前用溶剂萃取法,两种方法都证实有相似的回收率,低的检出限(2L样品检出限分别是0.4ng.L^-1和0.2ng.L^-1)和好重现性。还用仪器中子活化分析(INAA)进行了颗粒金的平行分析,以提供一个对转(迁)移金的完整的评价,检出在0.4~  相似文献   

11.
泥浆试验属于多因素多指标评价试验。应用模糊数学理论中的多目标模糊决策法,根据不同地层的钻进需要,借助计算机编程计算优选泥浆配方是一个行之有效的方法。   相似文献   

12.
水资源价值模型评价研究   总被引:25,自引:0,他引:25  
水资源价值是指水资源使用者为了获得水资源使用权需要支付给水资源所有者的货币额,它与水价是不同的概念,合理的水价应包括水资源价值。目前可以用来求算水资源价值的模型不同程度地存在各种问题,必须加以完善和发展。影子价格模型只反映水资源的稀缺程度和水资源与总体经济效益之间的关系,其结果不能代替水资源价值;边际机会成本模型存在着应用困难较大、替代选择多样性、结论缺乏可比性、忽略了水质等问题;供求价格模型仅仅通过水资源量决定水资源价值是不科学的;模糊数学模型是潜力较大的最新模型,其缺点是影响水资源的各项因素的模糊评价较复杂,权重的确定是多样的。  相似文献   

13.
模糊理论在遥感图像分类中的应用   总被引:1,自引:0,他引:1  
利用2000年假彩色遥感图像,采用模糊C-均值法中的欧氏距离和马氏距离法对崇明东滩的遥感图像进行了处理。通过对白色覆盖物、未耕种土地、一号水稻田、水体和二号水稻田的分类结果表明,欧氏距离的聚类结果优于马氏距离。  相似文献   

14.
Open-pit mining method has severe environmental impacts which should be prevented, monitored, controlled, and reduced by mined-land reclamation process. After mine closure, a permanent post-mining land use should be implemented as an appropriate choice for using different sections of mined land. The most appropriate alternative of post-mining land use for each section of mined land is presented as the optimum post-mining land use. Pit area among different sections of mined land has more significant effects on the environment and also on defining the optimum post-mining land use for other sections of mined land. Though there are several alternatives and criteria for defining the optimum post-mining land use, the multi-attribute decision-making methods can be efficient techniques in this regard. The nature of the effective parameters used for defining the optimum post-mining land use is the same as Fuzzy numbers including incremental changes without definite limits. Thus, application of the Fuzzy multi-attribute decision-making modeling can produce more reliable results than that of other techniques. As well, pair-wise comparisons and judgments through Fuzzy numbers have proper consistency with the nature of the effective parameters; therefore, a model is developed to attain the optimum post-mining land use for pit area through Fuzzy analytical hierarchy processing. As a case study, the model was implemented in Sungun copper mine in the Northwest of Iran. Forestry?Clumber production was defined as the optimum post-mining land use containing the greatest relative importance coefficient 3.019 for the pit area in this mine.  相似文献   

15.
We present new data for iron meteorites that are members of group IAB or are closely related to this large group, and we have also reevaluated some of our earlier data for these irons. In the past it was not possible to distinguish IAB and IIICD irons on the basis of their positions on element-Ni diagrams, but we now show that plotting the new and revised data yields six sets of compact fields on element-Au diagrams, each set corresponding to a compositional group. The largest set includes the majority (≈70) of irons previously designated IA; we christened this set the IAB main group. The remaining five sets we designate “subgroups” within the IAB complex. Three of these subgroups have Au contents similar to the main group, and form parallel trends on most element-Ni diagrams. The groups originally designated IIIC and IIID are two of these subgroups; they are now well resolved from each other and from the main group. The other low-Au subgroup has Ni contents just above the main group. Two other IAB subgroups have appreciably higher Au contents than the main group and show weaker compositional links to it. We have named these five subgroups on the basis of their Au and Ni contents. The three subgroups having Au contents similar to the main group are the low-Au (L) subgroups, the two others the high-Au (H) subgroups. The Ni contents are designated high (H), medium (M), or low (L). Thus the old group IIID is now the sLH subgroup, the old group IIIC is the sLM subgroup. In addition, eight irons assigned to two grouplets plot between sLL and sLM on most element-Au diagrams. A large number (27) of related irons plot outside these compact fields but nonetheless appear to be sufficiently related to also be included in the IAB complex.Many of these irons contain coarse silicates having similar properties. Most are roughly chondritic in composition; the mafic silicates show evidence of reduction during metamorphism. In each case the silicate O-isotopic composition is within the carbonaceous chondrite range (Δ17O ≤ −0.3‰). In all but four cases these are within the so-called IAB range, −0.30 ≥ Δ17O ≥ −0.68‰. Fine silicates appear to be ubiquitous in the main group and low-Au subgroups; this requires that viscosities in the parental melt reached high values before buoyancy could separate these.The well-defined main-group trends on element-Au diagrams provide constraints for evaluating possible models; we find the evidence to be most consistent with a crystal segregation model in which solid and melt are essentially at equilibrium. The main arguments against the main group having formed by fractional crystallization are: a) the small range in Ir, and b) the evidence for rapid crystallization and a high cooling rate through the γ-iron stability field. The evidence for the latter are the small sizes of the γ-iron crystals parental to the Widmanstätten pattern and the limited thermal effects recorded in the silicates (including retention of albitic plagioclase and abundant primordial rare gases). In contrast, crystal segregation in a cooling metallic melt (and related processes such as incomplete melting and melt migration) can produce the observed trends in the main group. We infer that this melt was formed by impact heating on a porous chondritic body, and that the melt was initially hotter than the combined mix of silicates and metal in the local region; the melt cooled rapidly by heat conduction into the cooler surroundings (mainly silicates). We suggest that the close compositional relationships between the main group and the low-Au subgroups are the result of similar processes instigated by independent impact events that occurred either at separate locations on the same asteroid or on separate but compositionally similar asteroids.  相似文献   

16.
模糊优选法以一个模型单元为对象。分别求出各个预测单元与该模型单元的相似度。据此,可得到在成矿环境方面与模型单元最为相似的单元,从而达到划分有利找矿靶区的目的  相似文献   

17.
Assessment of failure susceptibility of soil slopes using fuzzy logic   总被引:3,自引:0,他引:3  
Generally, the process of land occupation in urban areas involves spaces that are not suitable for construction. In most cases these areas are subject to landslides. Therefore it is mister the development of models to evaluate the susceptibility of occurrence of landslides in these areas. For this, Fuzzy Logic is used herein for modeling such areas where landslides are susceptible to occur and, therefore, a direct evaluation is important. The possibility of capturing the judgment and the modeling of linguistic variables are the main advantages of using Fuzzy Logic. These models are capable to capture the factors directly affecting the slope stability and also the inter-relationship amongst them. These factors were chosen by experts to whom a questionnaire was sent. Fuzzy Logic was then used to transform the linguistic variables into fuzzy number, allowing thus, the calculation of failure potential index (FPI). Herein the MAX-MIN Mamdani strategy for the inference of the rule base was used. This methodology has been applied to identify the susceptibility of landslides in a chaotic occupied urban area of Itaperuna City in northeastern of Rio de Janeiro, Brazil, where some occurrences have been reported.  相似文献   

18.
运用模糊综合评判法评价银川地区地下水质量   总被引:4,自引:0,他引:4  
通过对评价因子、评价标准、数学模型、模糊关系矩阵和权重因子的确定,运用模糊综合评判法对银川地区承压含水层地下水质量进行了评价,并对评价结果进行了分析。  相似文献   

19.
滑坡灾害稳定度综合评判模型   总被引:1,自引:0,他引:1       下载免费PDF全文
以滑坡灾害稳定度影响因素分析为基础,基于粗糙集理论(RS理论)对原始地质数据进行挖掘,获取各项参评地质因素的权重系数,运用模糊数学中多级模糊评判的理论和方法,建立滑坡灾害稳定度多级模糊综合评判模型,并以212国道宕昌—武都段六处堆积层滑坡为例验证模型方法,效果良好。  相似文献   

20.
模糊优选神经网络模型及其应用   总被引:14,自引:1,他引:13       下载免费PDF全文
给出一种能反映宏观决策意图的模糊优选神经网络模型,经用于大连市经济与水资源、环境可持续发展决策,取得了满意结果。  相似文献   

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