新疆砾岩油藏整体调驱矿场试验及效果分析

砾岩油藏原始非均质性极强,注采矛盾十分突出,部分层系存在明显水流优势通道,严重影响了注水开发效果。利用高强缓膨颗粒调堵剂具有在注入过程中缓慢膨胀的特点,能有效地进入地层深处,最大膨胀后能封堵高渗层和裂缝条带,达到深部有效封堵的目的,开展了砾岩油藏整体调驱矿场试验及效果分析。新疆六中东区块整体调堵效果表明,高强缓膨颗粒有效改善了砾岩油藏的严重非均质性和水驱开发效果,施工3年后试验区块累积增油34 226t,提高采收率8.38%。     

AC response analysis of C-V curves and quantitative analysis of conductance curves in Al2O3/InP interfaces

The ac signal response of majority carriers has been systematically investigated for Al₂O₃/InP metal-insulator-semiconductor (MIS) interfaces using C-V and the conductance methods. It was revealed by the conductance curve fitting that both slow trap and interface trap responses contribute to a conductance curve at the Al₂O₃/InP interfaces in the depletion bias condition, and that the contribution of slow trap response and large surface potential fluctuation make it difficult to obtain a clear conductance peak. It was found that the conductance curves in high frequency region can be represented by the surface potential fluctuation model. This means that the analysis through the conductance curve fitting is effective in characterizing III-V MIS interfaces.     

中央空调水系统的化学处理

介绍了中央空调水系统的化学处理工艺.经过化学清洗、钝化预膜和阻垢缓蚀的处理工艺,使空调水系统水质达到相应标准要求,保证空调系统正常运行.     

宽带衰落信道中慢衰落信号的实时测量

本文研究了宽带衰落信道中慢衰落信号的实时测量，通过将测量误差描述为高斯分布的随机变量量化分析了利用ＲＡＫＥ接收机实时测量慢衰落信号的误差，结果表明，采用ＲＡＫＥ接收机进行测量可以显著提高测量的准确性，同时，讨论了没条件下测量滤波器的设计 。     

Further study of grain boundary fracture in the breakage of single multiphase particles using X-ray microtomography procedures

The present work aims to verify the 3D quantitative analysis of grain boundary fracture in the breakage of single multiphase particles using X-ray microtomography. The breakage of single multiphase copper ore particles (6 mm cubic particles) by slow compression was examined. From XMT reconstructed images using the Marching Cube method, interfacial areas between copper mineral grains and host rock were determined for both parent particles and progeny particles. In this way, the specific interfacial area ratio was calculated as a metric for grain boundary fracture. Preferential grain boundary fracture only occurs at low energy dissipation rates and the current results confirm initial results for 3 mm cubes published previously by Garcia et al. (2009).     

光子带隙结构在微带带通滤波器中的应用

介绍了两种带有一维光子带隙(Photonic Bandgap，简称PBG)结构的馓带带通滤波器。它们具有良好的慢波滞阻特性，同时在结构上又无须腐蚀接地板．而仅仅修改微带线的形状。计算仿真与测量结果基本相符合。     

Temperature dependence of microelectronic device failures

Recently, the use and the applicability of reliability prediction models for microelectronic devices using the temperature-dependent Eyring and Arrhenius function, have been criticized. In fact, the temperature dependence of failure mechanisms of microelectronic devices and electronic equipment in general has been questioned. This paper discusses the effect of temperature on microelectronic failure mechanisms at various device failure sites. This paper also presents information on those mechanisms which may be more appropriately modelled by functions dependent on temperature change, the rate of temperature change and spatial temperature gradients.     

Application of chronopotentiometry and derivative chronopotentiometry with an alternating current to the study of a slow charge transfer in a surface confined redox system

General analytical expressions for the potential-time (E-t) and derivative-potential ((dt/dE)-E) curves of a electroactive monolayer exhibiting a quasi-reversible behaviour, corresponding to the application of an alternating current time function of the form I(t) = I₀ cos(ωt), are presented. The use of this programmed current gives rise to singular and characteristic electrochemical responses. The alternating current also allows to obtain cathodic or both anodic and cathodic responses depending on whether the depletion of the adsorbed species was complete or not, and without using more than one applied current. Moreover, in this last case, it is possible to distinguish a reversible or an irreversible process by means of a simple visualisation of the E-t or (dt/dE)-E curves. Easy methods for estimating thermodynamic and kinetic parameters of the electroactive film are proposed and experimentally tested and compared with those previously obtained by using Cyclic Voltammetry.     

缓释／控释包膜肥料的研究现状与发展

缓释腔释包膜肥料具有重要的经济效益和生态效益,因而成为目前肥料研究与发展的热点之一.简述了缓释腔释肥料的特点和分类,回顾了国内外缓释/控释包膜肥料发展和研究现状,总结了其养分释放机理和养分释放影响因素,论述了其发展前景,并分析了进一步研究和开发的方向.     

Batch process fault detection and identification based on discriminant global preserving kernel slow feature analysis

As an attractive nonlinear dynamic data analysis tool, global preserving kernel slow feature analysis (GKSFA) has achieved great success in extracting the high nonlinearity and inherently time-varying dynamics of batch process. However, GKSFA is an unsupervised feature extraction method and lacks the ability to utilize batch process class label information, which may not offer the most effective means for dealing with batch process monitoring. To overcome this problem, we propose a novel batch process monitoring method based on the modified GKSFA, referred to as discriminant global preserving kernel slow feature analysis (DGKSFA), by closely integrating discriminant analysis and GKSFA. The proposed DGKSFA method can extract discriminant feature of batch process as well as preserve global and local geometrical structure information of observed data. For the purpose of fault detection, a monitoring statistic is constructed based on the distance between the optimal kernel feature vectors of test data and normal data. To tackle the challenging issue of nonlinear fault variable identification, a new nonlinear contribution plot method is also developed to help identifying the fault variable after a fault is detected, which is derived from the idea of variable pseudo-sample trajectory projection in DGKSFA nonlinear biplot. Simulation results conducted on a numerical nonlinear dynamic system and the benchmark fed-batch penicillin fermentation process demonstrate that the proposed process monitoring and fault diagnosis approach can effectively detect fault and distinguish fault variables from normal variables.