高效复合生物流化床反应器三相分离区污泥对处理效果的影响

对采用高效复合生物流化床反应器处理中高浓度废水进行了试验研究。研究表明,三相分离区形成稳定的污泥层,有利于进一步提高反应器对污水的净化效果:曝气区出水经三相分离区污泥层的接触吸附及截滤作用,可使出水中悬浮物被有效去除;硝态氮在此缺氧的污泥层中可利用剩余碳源进行反硝化,使总氮去除率得以显著提高;出水水流中的BOD5则在通过污泥层时被吸附和截滤后,在反硝化作用中被作为碳源利用而得到进一步去除。

三相泡沫在采空区渗流特性的数值模拟

运用Tluent软件结合大兴矿703工作面建立了采空区多孔介质标准湍流模型,通过对注入泡沫材料属性的设置及初始条件、边界条件的限定,模拟得出了三相泡沫在采空区内的渗流特性;通过改变泡沫初始流速及压注泡沫的位置,找出了最优方案,此时泡沫渗流扩散范围最广,防火效果最佳。

三相压电复合本构模型中的弧形界面裂纹

深入研究了三相同心圆柱压电复合本构模型中的弧形绝缘界面裂纹问题 .采用复势方法获得了该问题的级数形式的精确解答 ,并给出了应力、应变、电位移和电场强度等物理量在全场及界面上的分布 ,同时推导了裂尖处广义强度因子及裂面张开位移和裂面上电势差的表达式 .具体计算表明该级数解答收敛迅速 ,同时显示出第三相混杂区的影响是不能忽略的 .由于裂尖处应力奇异性为 - 1 2 ,则这种解答不会出现平面应变状态下界面裂纹裂尖处的振荡奇异性 ,从而不会产生违反物理实际的裂面相互嵌入现象 ,则该弹性解答也是建立于坚实的物理基础之上 .

基于距离的离群点算法和三相不平衡电流分析的用户窃电研究

传统依托用电量和台区线损关联性来定位、现场排查窃电的模式存在效率低、准确性不高等问题,同时具有一定的滞后性。通过全面分析目前的窃电手段,绘制出实施窃电方式的帕累托图;针对窃电方式占比较高的失流窃电方式,结合96个点的日冻结电流数据,开展基于距离的离群点算法来辅助定位疑似窃电用户;为了剔除三相不平衡电流对失流窃电算法的影响,开展三相不平衡台区的理论线损值评估计算;最终根据这两个条件来筛选重点疑似窃电对象,为基层供电公司开展精准有效反窃电提供了一种新思路。

二氧化碳驱地下流体相态特征研究

目前国内注入CO2提高采收率开发项目由于矿场试验周期短,对开发机理和气驱油特征规律认识还不够深入,尤其对CO2驱替过程中的流体相态特征研究鲜有报道。通过油藏工程方法和数值模拟方法,利用相平衡计算模型和PVTi流体分析软件包,分析CO2含量对地下流体相态的影响。研究表明,对于任何CO2—原油体系都存在临界点,在临界点的下方,当低于一定温度时,随着CO2注入量的增加,在一定的压力范围内,CO2与原油体系会出现三相区;同时CO2含量对CO2—原油体系黏度及体积膨胀系数有很大的影响,随着CO2溶解量的增加,CO2—原油体系黏度降低,膨胀系数增加。该研究可对CO2驱油藏开发起到一定的指导作用。

Interdecadal variability of summer precipitation in the Three River Source Region: Influences of SST and zonal shifts of the East Asian subtropical westerly jet

Summer precipitation in the Three Rivers Source Region(TRSR)of China is vital for the headwaters of the Yellow,Yangtze,and Lancang rivers and exhibits significant interdecadal variability.This study investigates the influence of the East Asian westerly jet(EAWJ)on TRSR rainfall.A strong correlation is found between TRSR summer precipitation and the Jet Zonal Position Index(JZPI)of the EAWJ from 1961 to 2019(R=0.619,p<0.01).During periods when a positive JZPI indicates a westward shift in the EAWJ,enhanced water vapor anomalies,warmer air,and low-level convergence anomalies contribute to increased TRSR summer precipitation.Using empirical orthogonal function and regression analyses,this research identifies the influence of large-scale circulation anomalies associated with the Atlantic–Eurasian teleconnection(AEA)from the North Atlantic(NA).The interdecadal variability between the NA and central tropical Pacific(CTP)significantly affects TRSR precipitation.This influence is mediated through the AEA via a Rossby wave train extending eastward along the EAWJ,and another south of 45°N.Moreover,the NA–CTP Opposite Phase Index(OPI),which quantifies the difference between the summer mean sea surface temperatures of the NA and the CTP,is identified as a critical factor in modulating the strength of this teleconnection and influencing the zonal position of the EAWJ.

Ni-SDC多孔阳极制备研究

阻抗谱测试表明,含纳米尺寸NiO的复合材料的极化电阻更小,电导率更高。以质量分数为55%的NiO-YSZ为阳极材料,并将其封接成单电池,其输出功率更高,短路电流更大。通过减小NiO晶粒尺寸,可增大阳极三相反应界面长度,并获得性能优良的阳极材料。

NiO晶粒尺寸对SOFC阳极电化学性能的影响

用溶胶凝胶法合成了具有高比表面积的纳米粒子 Ni O,用固相合成法制备了 Ni O-YSZ复合材料 .阻抗谱测试表明 ,含纳米尺寸 Ni O的复合材料的极化电阻更小 ,电导率更高 .以质量分数为 5 5 %的 Ni O-YSZ为阳极材料 ,并将其封接成单电池 .结果表明 ,含纳米尺寸 Ni O的复合阳极制成的单电池 ,其输出功率更高 ,短路电流更大 .通过减小 Ni O晶粒尺寸 ,可增大阳极三相反应界面长度 。

UASB反应器的结构与设计方法

剖析了升流式厌氧污泥床（UASB）反应器的整体及分部结构，以某食品厂污水处理工程为实例，对各部分的具体参数、设计方法，作了详尽的介绍，有利于UASB技术的推广应用。

Flow characteristics of three-phase foam in mine gob and its application

To study the flow characteristics of three-phase foam in gob area,different perfusion experiments in coal mine gob were designed and put forward in the paper.Through the observation of flow range,flow characteristics of three phase foam were analyzed with different flow rates.And,unsteady seepage process of three-phase foam was simulated with CFD software.Base on experiment and numerical simulation results,flow characteristics of three-phase foam and its major influence factors are discussed,and the optimal arrangement distribution of mine fire control drills is also determined.Research results show that the flow range and stacking height of three-phase foam in gob are significantly influenced by gravity.The vertical stacking height and horizontal diffusion distance of three-phase foam are also directly related to the flow volume of foam perfusion,the larger flow single hole perfusion volume,the higher stacking height and the longer diffusion distance could be obtained.

Determination of isothermal section of Ni-Re-Hf ternary system at 1173 K

The phase equilibriua in the Ni Re Hf ternary system at 1173K were investigated by means of diffusion triple technique and electron microprobe analysis(EMPA). The experimental results indicate that two ternary intermetallics (α and β) and five binary intermetallics (Ni 3Hf, Ni 10 Hf 7, Ni 11 Hf 9, NiHf and NiHf 2) exist in the Ni Re Hf system at 1?173 K. A tentative isothermal section of this system at 1?173 K was constructed on the basis of experimental results. The isothermal section consists of nine three phase regions, five of which are supported by the experimental data.

Application of sequence stratigraphy to Triassic terrestrial strata in Tahe area of Tarim Basin

Based on a synthetic geological study of drilling,well logging and seismic data,core observations and geochemical analysis,it is recognized that Triassic sedimentary facies in the Tahe area of Tarim Basin include braided river deposits filling erosional valleys,and sublacustrine fan,canyon and delta facies.Braided river deposits filling erosional valleys are dominated by coarse-grained lithic quartz sandstone with oblique bedding,and represent the most important sedimentation type of sandstone in the study area.Sublacustrine fan and canyon facies are mainly distributed in the Middle Oil Member.Most delta sediments are deposited in highstand system tract(HST),Because of frequent changes in base level,delta sediments are commonly eroded and rarely preserved.Sedimentary cycles are clearly reflected by lithology,sedimentary structures and well logging data,and are closely related to the changes in lacustrine level.In accordance with the basic principle of sequence subdivision,seven type-I boundaries can be recognized in Triassic strata and six type-I sequences are subdivided correspondingly.In general,lowstand system tract(LST) is well developed within stratigraphic sequences and forms the main body of reservoir sandstone in this area;highstand system tract(HST) and transgressive system tract(TST) are often eroded by upper sequences or missed,Although various factors have different influences on terrestrial sequence stratigraphy,the classical sequence stratigraphy theory proposed by VAIL can be applied to terrestrial strata.

Sedimentary microfacies of the H8 member in the Su14 3D seismic test area

The distribution of sedimentary microfacies in the eighth member of the Shihezi formation（the H8 member） in the Sul4 3D seismic test area was investigated.A Support Vector Machine（SVM） model was introduced for the first time as a way of predicting sandstone thickness in the study area.The model was constructed by analysis and optimization of measured seismic attributes.The distribution of the sedimentary microfacies in the study area was determined from predicted sandstone thickness and an analysis of sedimentary characteristics of the area.The results indicate that sandstone thickness predictions in the study area using an SVM method are good.The distribution of the sedimentary microfacies in the study area has been depicted at a fine scale.

Fe-Mn-Al系相图的实验测定

用电子探针微分析方法测定了 Fe-Mn-Al 系富 Fe 角的五个等温截面,研究了碳对相界的影响。800℃时得到了α+γ+β三相区。碳能使γ相区扩大,高温时效果更显著。

Initial research on the polarized reflectance of typical urban surface types measured by the Directional Polarimetric Camera

This paper retrieves the bidirectional polarization distribution functions (BPDFs) of the distinct urban cover in the Pearl River Delta (PRD) region employing the high spatial resolution of multi-angle polarized measurements made by the Directional Polarimetric Camera (DPC).The BPDF operational products of MICROPOL and POLDER measurements were used to validate the BPDF products of the DPC,with the results demonstrating that the BPDF product of the DPC measurements accurately expresses the surface polarized reflectance.The polarized reflectance of distinct surface types in the PRD region was studied using the DPC measurements.The results demonstrate that the polarized reflectances of different surface types differ and decrease as the normalized difference vegetation index increases.The polarized reflectance of a distinct surface type in the PRD region decreases with increasing scattering angle.The basic theory of investigating surface properties using multi-angle polarized measurements is proposed.

Some Theories and Concepts of Intergroup and Conflict Relations in the Western Niger Delta of Nigeria

Intergroup conflicts occupy a special place in the interaction of social groups and of necessity form the basic building blocks for the integration of previously fragmented groups. The Western Niger delta obviously has since been a theatre of socio-political conflicts. Viewed from the contemporary clime, there is a lacuna in the formulation of theories and concepts in understanding and explaining the nature and pattern of intergroup relations in the region from the pre-colonial period. This work therefore attempts an exploratory analysis of some theories and concepts of intergroup relations in the Western Niger Delta of Nigeria using the historical approach with the use of secondary source materials. The paper concludes that the relation among the diverse ethnic groups in Nigeria, especially the Western Niger Delta, may not have been as intense, or as hostile as it has become since the attainment of independence in 1960. This paper no doubt is essential for the understanding and tackling of the problem of intergroup relations and conflict in the region in particular and Nigeria at large.