浅层地震勘探在第四纪松散地层划分中的应用

采用浅层地震勘探技术在矿区第四纪松散地层进行地层、构造和地下水勘探。通过以反射波法为主,折射波、面波法为辅的综合地震勘探方法较为准确地对勘探区地层进行了划分,结合钻孔勘探,有效揭露了矿区第四系地层厚度及地层空间展布特征。地震勘探将矿区地层划分为三大套岩性层,分别为第四系全新统地层、上更新统地层和元古界基岩层,与钻孔勘探揭露地层基本一致。钻孔K1处地震法解释第四纪地层厚度为240m,钻孔勘探揭露厚度为241．37m,验证了地震勘探的可靠性。     

从品德形成的心理过程看品德形成滞后现象

针对德育工作中存在的品德形成滞后现象,从品德形成的心理过程分析了产生品德形成滞后的原因,提出了合理缩短品德形成滞后期的对策。     

移动床径向反应器中气体离心流动对颗粒移动状况的影响

对于催化剂不断失活但可再生的工业过程,广泛采用移动床径向反应器在较低的系统压降下进行连续操作.此时存在由贴壁和空腔现象所决定的径向气体流量的上限值.本文分析了有径向离心气体流动时颗粒层中的应力分布,应用散料力学理论建立了计算床中初始形成空腔时无因次床层总压降的理论模型,模型预测值与实验值符合很好.同时测定了不同条件下空腔界面的形状.     

Hele—Shaw装置中粘性指进现象的研究

本文在Hele-Shaw装置中研究了粘性指进现象,与文献相比,考虑了更多的影响因素,得到低粘度牛顿流体驱替高粘度牛顿流体排出率的更为一般的经验关联式。同时考察了几种涉及非牛顿流体、泡沫和凝胶的粘性指进现象,定性地分析了其驱替稳定性。     

赛汉塔拉凹陷层序地层研究与岩性油藏勘探

应用钻井和地震资料,分析赛汉塔拉凹陷白垩系地层的沉积充填、层序发育特征,建立全凹陷Ⅲ级层序地层充填格架,可以得出以下结论:都如吉洼槽极其周缘Ⅲ极层序S1低位体系域、S2的高位体系域、S3和S4的低位体系域位于有利的生油洼槽,储层发育,是岩性油藏发育的有利层段。     

Oxidation kinetics and high temperature in-situ observation of the oxidation behaviour of NbSi_2 at 1023 K

Pest oxidation has been known for a long time in refractory transition-metal disilicides such as NbSi2 and MoSi2[1―4]. However, the origin of pesting reaction of these materials is still under debate. Although the pesting phenomenon in NbSi2 has been reported in several works[5―7], a direct study of the mechanism is scarce at the moment. Compared to NbSi2, pesting in MoSi2 has received relatively extensive attention. Mckamey et al.[8] showed fragmentation near 773K occurred easily in as…     

中介真值程度的度量及其应用(Ⅰ)

以中介数学系统为背景，为处理工程实践和科学研究中普遍存在的模糊现象提供一种度量逻辑真值程度的方法．在建立了谓词的ε标准度概念后，描述了对一般应用的数值区域与对应谓词的真值之间的关系；采用距离概念，并以对应谓词真值的数值区域的长度为基准，定义了距离比率函数及距离比率的特殊变换，并由此建立了一维情形下个体真值程度函数．又在提出关于n维情形的分支谓词、幂集逆映射和标准度向量概念后，描述了真值程度和函数、极值分支函数等n维情形的应用形式．应用示例表明：由于提出超态概念，所以理论上能把真值程度域从[0，1]拓宽到（-∞，＋∞）；真值程度函数的定义具有计算机可以处理的定量形式且具有客观性和普适性的特点．因此，真值程度的度量将在涉及模糊现象的领域得到有效的应用．     

Choking Phenomena of Gas‐Powder Flows at Sonic Velocity

Choking phenomena of gas‐powder flows in a horizontal constant cross‐section duct are experimentally studied using three kinds of powders: Al₂O₃, hollow Al₂O₃ (H‐alumina) and Al, with different physical properties such as densities, specific heat capacities and thermal conductivities. The relationship between the mass flowrate and inlet stagnant pressures is analysed and the apparent sonic velocity (ASV) of gas‐powder flows is defined. The influences of physical properties of powders on the ASV are obtained by the comparison between the experimental results of different powders. Two characteristic parameters, the effective specific heat capacity (ESHC) of solid phase and the effective isentropic exponent (EIE) of the mixture, are defined to describe the choking phenomena. The ESHC is not only measured through experiment but also calculated by numerical method. The calculated results are well consistent with the measured ones. As a preliminary application test for choking phenomena ‐ in order to uniform the pulverized coal injection (PCI) into a blast furnace ‐, a model PCI system with two branch pipes was set up and tests were carried out to verify the choking effect. The test results show that, during choking, the PC flow rates in the branch pipes can be well equalized no matter how much the downstream conditions differ from each other.     

压浆材料及施工技术的研究

根据高速公路路面实际情况对路面板脱空现象进行压浆处理。路面板脱空位置是通过弯沉法和雷达观测法确定的，并结合路面唧泥情况钻孔法进行压浆，最终取得了较好的压浆效果。     

BP算法执行过程中的平台现象及其减少方法的研究

基于对ＢＰ算法执行中存在的平台现象的分析，从神经元作用函数的总输入，作用函数的选择，作用函数的自适应调整和网络初始权值的选择几方面，分析和研究了减少平台现象的措施，提出了神经元作用函数的选择方法，给出了具有作用函数自适应调整的ＢＰ算法，得到了４种减少平台现象的措施。