扬子地块西南缘低温成矿域Au、Sb、Hg、As矿床区域分布上的共生分异及控制因素

扬子地块西南缘大面积低温成矿域的Au、Sb、Hg、As矿床,常出现共生分异的现象,在空间上形成Au、Sb、Hg、As矿床、矿带相伴出现而又相对独立的规律性分布。在详细研究Au、Sb、Hg、As矿床、矿带区域分布及其产出地质背景的基础上,从不同的角度,对制约Au、Sb、Hg、As矿床、矿带共生分异的因素进行了探讨。     

含油污泥调剖技术在陇东油田悦29区的应用

针对长庆陇东油田悦29区注水平面矛盾突出的特点,优选了含油污泥调剖技术。详细介绍了调剖体系的配制,调剖体系性能测试表明其相关性能指标满足要求。进行了驱替模拟试验,结果表明:其封堵作用可以维持较长时间,通过对不同注水井组进行现场应用,显示该技术能改善水驱开发效果,可以满足油藏深部封堵大孔道的技术要求,有增油降水效果。     

Coal facies characteristics and its control on methane content in South Yanchuan Block,Southeast Ordos Basin,China

The variability in depositional environments in ancient peat bog and coal facies characteristics was investigated with 29 coal samples from four coalbed methane wells in South Yanchuan Block, Southeast Ordos Basin, China. The control of methane content is described as coal facies parameters and the corresponding measurements of methane content. The results indicated that the depositional environment of ancient peat bog in South Yanchuan Block is primarily a lower delta plain, and a low tissue preservation index (TPI) and high gelification index (GI) are typical features of reservoir’s coal facies, reflecting a deep water depositional environment in ancient peat bog. Compared with the coal facies characteristics of the western area, the coal reservoir in the eastern area displays low GI and high ash content as a result of ancient peat bog’s proximity to sea and source area. Various lateral methane contents are influenced by burial depth, whereas the characteristics of coal facies have a strong control on methane content within the single well in vertical direction. The methane content increases with increase in GI and vitrinite to inertinite ratio (V:I), while there are indistinct relationships between TPI and transportation index with methane content. With high GI and longer distance to sea and source area, the methane content in the western area is higher than that of the eastern area. High desmocollinite content also has a negative influence on methane content.     

Quantification and reduction of erroneous differences between images in remote sensing

The reliability of image data, along with the difficulty of accurately comparing images acquired at different times or from different sensors, is a generic problem in remote sensing. Measurement repeatability errors occur frequently and can substantially reduce the system’s ability to reliably quantify real spectral and spatial change in a target. This paper outlines methodologies for quantifying and reducing erroneous differences between monochrome and multispectral or hyperspectral images. [Each of these image types is acquired by an instrument that collects light photons across a variable range of the electromagnetic spectrum (often referred to as an image band). The hyperspectral image is often referred to as a hyperspectral cube with XY spatial dimensions and many Z bands (spectral demotions)]. In this paper, we specifically discuss the Pixel Block Transform (PBT), the Spectral Averaging Transform (SAT), and the Wavelet Transform (WAVEL). We briefly address sensor fusion. Results indicate that the PBT is a powerful cross-noise and repeatability error reducing tool, applicable to monochrome, multispectral, and hyperspectral images. The SAT is as powerful as the PBT in reducing error but is suitable only for hyperspectral imagery. WAVEL can reduce some of the finer scale noise, but it is not as powerful in reducing cross-noise as PBT or SAT and it requires some trial and error for selecting the appropriate wavelet function. It is important that those involved in developing statistically sound relationships between remotely sensed imagery and other data sources understand the problems and their solutions to prevent wasting time or developing relationships that are statistically insignificant or unstable, or that lead to faulty conclusions.     

光合细菌和螺旋藻对黄泔水净化与利用初探

应用光合细菌将黄泔水中的有机物降解转化为无机氮磷后养殖螺旋藻。结果表明,在实验条件下光合细菌对黄泔水ＣＯＤｃｒ的去除率可达７０％,处理后的黄泔水用甲壳质絮凝澄清后加入螺旋藻并曝气进行培养,藻生长周期为２２ｄ,生长速率为２０－３０ｍｇ／Ｌ．Ｄ。藻体蛋白质含量平均为５２．６ｇ／１００ｇ游离氨基酸平均含量为２．４ｇ／１００ｇ。     

前混合式磨料射流系统的容积效应及有关安全问题

前混合式磨料射流系统具有明显的容积效应。通常情况下 ,系统在停止工作压力降低时 ,磨料罐将排出约 1 L的浆液 ,在长 5 m以上的管路中淤积 ;重新工作时 ,将造成喷嘴和管路的严重磨损 ,甚至造成堵塞 ,使系统不能正常工作。为此 ,笔者提出了一种新型的射流发生系统 ,改善系统的容积效应 ,在其停止工作时 ,采用了磨料罐从上方排出清水以降低系统压力方法 ,改善磨料大量涌出和管路淤积现象 ,同时也对管接头等磨蚀引起的有关安全问题进行了讨论。     

光合细菌和螺旋藻对啤酒废水的净化与利用研究

应用ＰＳＢ将啤酒废水中的有机质降解处理为无机质，用甲壳絮凝沉降除去ＰＳＢ后加入螺旋藻进行培养。小型动态模拟实验结果表明ＰＳＢ和螺旋藻不仅能高效地净化啤酒废水。     

亩强度Te（Ⅳ）胁迫对极大螺旋藻生理生化性质的影响

对极大螺旋藻（Spirulina maxima）在接种后第3～5d分3次添加Na2TeO3，4个Te胁迫组的累计加Te量分别为650、750、850和950mg／L。结果表明：4个Te胁迫组螺旋藻的最终生物量、水溶性蛋白、藻蓝蛋白和别藻蓝蛋白的含量均低于对照组，且随Te胁迫强度增加而逐渐减少；而SOD的比活力均高于对照组，但随Te胁迫强度增加也呈逐渐减少趋势；Te（Ⅳ）胁迫没有改变螺旋藻中脂溶性色素的组成，但各色素的含量也随Te胁迫强度增加而下降；胞外多糖含量随Te胁迫强度增加而增加，但950mg／L实验组（第9dxTe（Ⅳ）为2．21），胞外多糖的含量反而下降。     

网络路由信息安全应用研究——基于流量预测的路由选择新算法

根据灰色系统的预测理论 ,笔者提出了一种关于网络数据流量变化发展的预测方法 ,并为其建立了基于网络流量变化趋势的预测模型。依据该模型对网络中各结点未来流量的预测结果 ,可用实时动态来确定最佳的路由选择策略 ,从而在根本上解决网络拥塞现象的发生 ,大大地提高了网络数据通信时的安全可靠性。     

Gatekeeping and Communities in Energy Transition: A Study of the Block Island Wind Farm

ABSTRACT

The Block Island Wind Farm (BIWF) is the first offshore wind farm in the United States. Using gatekeeping theory as a framework, this research analyzes local and regional/national newspaper coverage of the BIWF paying particular attention to the use of sources. The data suggest that the differences between newspaper source usage from 1 January 2008 to 1 July 2017 is minimal. However, business sources appeared more than any other group, including government sources, which is a new finding. The prevalence of business sources leads to important questions about the role of businesses in shaping narratives about community transitions to renewable energy systems.