银洞子多金属矿可持续发展研究

根据银洞子多金属矿矿区的自然资源情况和矿区所具有的区位优势,对该矿区可持续发展进行了研究,结果表明:矿区的找矿前景广阔;在现有勘探成果及采选设施和金属市场条件下,可基本实现矿山的初期积累和滚动;矿床赋有的矿石其综合利用价值较高,矿区又具有很好的区位优势,使得矿山完全有可能建设成1座中型以上的多金属加工矿山;丰富的多金属资源加上优质大理岩和水电,为矿山走上循环经济发展的道路奠定了坚实的基础。     

ZSM-5分子筛改性对正己烷裂解及芳构化性能的影响——Ⅰ.不同金属离子改性ZSM-5分子筛的研究

本文以正己烷为反应物,在脉冲微反装置上,考察了经Ni~(2+)、Ce~(3+)、Al~(3+)和Mg~(2+)等金属离子改性的ZSM-5分子筛的裂解性能和芳构化性能.研究结果表明,金属离子改性可以提高ZSM-5分子筛的活性稳定性.其中,以镍改性分子筛效果最好.它不仅能显著提高活性,而且其新鲜样品对B. T. X(苯+甲苯+二甲苯)有优异的选择性,其老化样品对低碳烯烃也有较好的选择性.改性分子筛的上述特性与其酸性特征是密切相关的.本文还以镍改性分子筛为例,简单比较了离子交换和等量浸渍两种改性方法.     

岩爆预测方法的分析

系统地介绍了目前国内外有关岩爆预测方法并进行分类，重点评述了这些方法的实际应用中的情况，并提出了一些看法。这对以后如何建立更有效、更实用的岩爆预测方法有一定的参考意义。     

转变增长方式 优化产品结构

转变增长方式优化产品结构杭州永固橡胶厂曹平党的十四届五中全会提出积极推进增长方式的转变，把提高经济效益作为经济工作的中心，这是我国今后１５年经济和社会发展的重要方针。经济增长方式转变其精神实质是由粗放型向集约型转化，要求增大企业对于市场的适应能力，提...     

八面河油田北二区细分层开发研究

针对八面河油田中高渗厚层油藏层内出力不均的问题,采用层内剩余油分布有差异和夹层在电性上能够有效划分为精细划分标准,以剩余油监测结果为依据,结合夹层分布情况,选取岩性、电性特征较为明显的井为标准井进行砂岩细分。根据剩余油监测曲线中的夹层显示,以基线与监测曲线重合程度为依据,制定夹层的封堵性标准,进行有效夹层描述。     

一种计算mBnB编码数据相关性抖动峰峰值的方法

从信道响应函数出发,推导了高速串行通信中计算数据相关性抖动的一般公式,结合mBnB编码规则,提出了以单位脉冲响应的幅度作为权重的优先迭代算法,求得使数据相关性抖动取得极值的mBnB编码序列,进而计算数据相关性抖动峰峰值.利用实测得到的信道参数验证了该算法,相比于发送大量随机mBnB编码码流来遍历搜索数据相关性抖动极值的方法,该方法计算简单,且误差小,能够快速准确地得到mBnB编码码流的数据相关性抖动的峰峰值,并可据此评估不同mBnB编码的抖动性能.     

人体心电电话遥测系统的研制

心电电话遥测系统国内尚不多见，这是一种心电监护仪器。心脏病患者在需要的时候，利用随身携带的心电信号采集存储器存放心电数据，拨通医院ICU的值班电话，通过电话线路将存储的数据传送到医院的计算机中。医生利用计算机屏幕，查看该患者的心电波形，对信号进行诊断、处理、     

Crack initiation stress and strain of jointed rock containing multi-cracks under uniaxial compressive loading：A particle flow code approach

The ratio of crack initiation stress to the uniaxial compressive strength(SCI,B/SUC,B) and the ratio of axial strain at the crack initiation stress to the axial strain at the uniaxial compressive strength(B,UCB,CI,A,A/SSSS) were studied by performing numerical stress analysis on blocks having multi flaws at close spacing’s under uniaxial loading using PFC3 D. The following findings are obtained: SCI,B/SUC,B has an average value of about 0.5 with a variability of ± 0.1. This range agrees quite well with the values obtained by former research. For joint inclination angle, β=90°,B,UCB,CI,A,A/SSSS is found to be around 0.48 irrespective of the value of joint continuity factor, k. No particular relation is found betweenB,UCB,CI,A,A/SSSS and β; however, the average B,UCB,CI,A,A/SSSS seems to slightly decrease with increasing k. The variability ofB,UCB,CI,A,A/SSSS is found to increase with k.Based on the cases studied in this work,B,UCB,CI,A,A/SSSS ranges between 0.3 and 0.5. This range is quite close to the range of 0.4to 0.6 obtained for SCI,B/SUC,B. The highest variability of ± 0.12 forB,UCB,CI,A,A/SSSS is obtained for k=0.8. For the remaining k values the variability ofB,UCB,CI,A,A/SSSS can be expressed within ± 0.05. This finding is very similar to the finding obtained for the variability of SCI,B/SUC,B.     

Test of subcritical crack growth and fracture toughness under water-rock interaction in three types of rocks

The subcritical crack growth and fracture toughness in peridotite, lherzolite and amphibolite were investigated with double torsion test. The results show that water-rock interaction has a significant influence on subcritical crack growth. With water-rock interaction, the crack velocity increases, while the stress intensity factor declines, which illustrates that water-rock interaction can decrease the strength of rocks and accelerate the subcritical crack growth. Based on Charlse theory and Hilling & Charlse theory, the test data were analyzed by regression and the correlation coefficients were all higher than 0.7, which shows the correlation is significant. This illustrates that both theories can explain the results of tests very well. Therefore, it is believed that the subcritical crack growth attributes to the breaking of chemical bond, which is caused by the combined effect of the tensile stress and the chemical reaction between the material at crack tip and the corrosive agent. Meanwhile, water-rock interaction has a vital effect on fracture toughness. The fracture toughness of samples under atmospheric environment is higher than that of samples immersed in water. And water-rock interaction has larger influence on fracture toughness in amphibolite than that in peridotite and lherzolite.