东海陆架盆地西湖凹陷中北部花港组储层致密化过程分析

综合运用薄片鉴定、扫描电镜、恒速压汞、X衍射、流体包裹体测温、激光拉曼成分分析及伊利石同位素测年等技术方法,分析了东海陆架盆地西湖凹陷中北部花港组储层致密化过程,并探讨了储层致密化控制因素.花港组储层非均质性受孔喉结构控制,喉道半径小于1μm即为致密储层;埋藏压实是储层普遍低渗、致密的主因,差异成岩作用加剧了储层的差异...     

5个不同产区地理标志辣椒营养成分分析

目的 探究5个不同产区(高台、宝鸡、安集海、丘北和甘谷)地理标志辣椒果实的品质特点及营养成分。方法 采用食品安全国家相关标准规定的方法测定感官指标和营养品质指标。结果 不同地理标志辣椒的果实长度、果肩宽及果肉厚度等感官特性存在一定差异,其中甘谷辣椒果实最长,丘北辣椒果肩宽和果肉厚度最大。分析营养成分时发现甘谷辣椒中粗纤维、维生素C、反式辣椒红素和不挥发性乙醚提取物含量最高,分别为25.64%、45.76 mg/100 g、17.02 g/kg和7.93%;宝鸡辣椒中可溶性糖、脂肪及可溶性固形物含量最高,分别为0.38%、8.50 g/100 g、63.00%;高台辣椒中总辣椒碱和硒含量最高,分别为0.18%和1.81 mg/kg;;安集海辣椒钙含量最高,达到了1.42 g/kg,丘北辣椒铁和胡萝卜素含量最高,分别为76.40 mg/kg和35.67 mg/100 g。主成分分析发现,提取的前3个主成分累计贡献率为80.8889%,对果实营养品质影响最大。第一主成分特征向量中载荷较高的营养物质有脂肪、反式辣椒红素、不挥发性乙醚提取物,第二主成分特征的硒、钙、维生素C的载荷较大,第三主成分...     

不同粒径改性粉煤灰对磷酸根吸附性能的影响

废水排放过量的磷导致水体污染日益严重,将粉煤灰通过化学改性制备成了水化硅酸钙吸附剂,研究了改性吸附剂对磷酸根的吸附效果。利用XRD, SEM及BET比表面积等手段对粒度分级前后的吸附剂进行表征,研究不同粒级吸附剂对磷酸根的吸附性能,并考察其吸附机理。结果表明,不同粒级的吸附剂其化学成分出现了明显的偏析现象,孔隙结构也差异显著。相比其他粒径下的吸附剂颗粒,颗粒粒径在50?75 μm时,吸附剂中钙和硅含量较多,铝、铁和镁含量较低,水化硅酸钙组分含量最高,且伴有含铝的托贝莫来石晶体出现,钙离子的增加使其可以与更多的磷酸根结合形成沉淀。同时此粒径下具有较高的比表面积及孔隙度,疏松多孔的结构为钙离子提供更多活性位点。当使用粒径在50?75 μm的吸附剂吸附磷酸根时,磷的饱和吸附量可达到17.1 mg/g,比未分级的吸附剂高19.58%。     

Experimental investigation of different morphology textured ceramic tools by in-situ formed for the dry cutting

Surface texture is considered an important measure to improve the cutting performance of a tool. In this study, we have prepared three types of textured and conventional tools on the rake face by an in-situ formed method. During the experiment, the best parameters of three types of textured tools were selected for dry cutting AISI 1045 steel at different cutting speeds. Cutting forces, cutting temperatures, workpiece surface roughness, and tool wear were measured during the cutting process. The results showed that textured tools have significantly reduced cutting force, cutting temperature, and tool wear, and the roughness of the workpiece was improved compared with the conventional tool. The micro-pit texture tool has less stress contact region than the micro-groove width texture tool, but the micro-groove width texture tool exhibiting the best cutting performance. This investigation clearly showed that the textured tool prepared by the in-situ formed method has improved cutting performance.     

不同煤层掘进工作面瞬变电磁法探测应用研究

煤矿井下瞬变电磁法成为煤矿井下超前探测工作的重要手段,在矿井水害预测预报上发挥着很大的作用。随着矿井上组煤层资源的逐渐枯竭,煤矿开采资源逐渐延伸向下组煤层。同一井田范围内同煤层及其顶底板的岩性特征一般相差不大,瞬变电磁法在同煤层施工过程中接收到的物理背景场较为接近;而不同煤层及其顶底板岩性特征通常会有较大的差别,瞬变电磁法在不同煤层施工过程中会接收到差别较大的物理背景场。当矿井存在多煤层开采时,通过大量数据研究瞬变电磁法在不同煤层巷道探测中的响应特征规律,分析并掌握不同煤层条件对瞬变电磁法探测结果的影响,能够提高瞬变电磁法在多煤层探测成果的准确性。     

钢桥面沥青混合料铺装应变动态响应实测研究

掌握钢桥面沥青混合料铺装层在车载作用下的真实力学特性对桥面铺装体系设计有重要意义,而现阶段现场桥面铺装层的力学实测数据仍偏少,尤其缺乏对铺装层不同温度下服役时力学特性的长期监测。为此,该研究对钢桥面双层SMA混合料铺装进行现场实桥加载试验,实测铺装层在低温、中温、高温3种服役温度下的应变响应数据。试验结果表明,钢桥梯形肋正上方铺装层混合料在中低温服役状态下主要承受压应变的作用,而在高温服役时则主要承受拉应变的作用;动载作用过程中铺装层底纵向应变会出现拉压应变交替作用的现象,而横向应变只体现为拉应变或压应变的形式;加载车行驶速度对混合料的应变极值均有明显的影响,加载车低速行驶时混合料层底横向及纵向变形最为显著。同时,研究利用加载试验中铺装层应变响应时程曲线,计算不同加载状态下混合料对应的加载频率数值,计算结果可为钢桥面铺装混合料室内试验中加载频率参数的确定提供参考。     

采用差异化用水量指标预测污水处理厂的规模

目前,国内许多污水处理厂存在建设规模较大而进水量较小的矛盾.究其原因,常规的污水量预测方法因用水量指标取值不合理,常造成污水量预测结果偏高,导致污水处理厂的设计规模偏大.根据青岛市用水、排水的实际情况,在污水处理厂规模的预测中,综合考虑各污水排放区域经济社会发展的不平衡,采用差异化用水量指标预测污水量;并且通过不同的污水量预测方法,剖析污水量预测结果存在差异的原因,以此确定合理的污水处理厂规模,使之更加符合实际.     

Analysis of geosynthetic tubes filled with several liquids with different densities

A two dimensional model of a geosynthetic tube sitting on a rigid horizontal foundation and filled with several separated liquids with different densities is proposed. The material from which the tube is made is a special synthetic fabric which is inextensible, perfectly flexible, and leakproof. Such a model is useful for modeling a consolidations process in the tube filled with a slurry. The equilibrium equations of the model are formulated. Unknown values like the pressure on the top and bottom of the tube, the tension in the geosynthetic fabric, the length of the contact zone between the tube and the rigid foundation are searched with respect to the given perimeter, the volumes and densities of liquids. Such a problem is solved by the Newton’s method. The initial approximation is obtained by solving a simplified problem with one liquid with the average density. The problem is implemented in a MATLAB code for geosynthetic tubes filled with two, three, and four liquids with different densities. The tubes filled with two different liquids are studied in more detail. The graphs of the relations are compared with the graphs for the tube filled with the single liquid whose density is the average of the densities of the liquids. The comparison enables to discuss the influence of the consolidation process on the height, the contact zone, the pressures and the tension of the tube. The results of the proposed model for a tube filled with a single liquid are compared with another model.     

不同因素对Sialon陶瓷结构与性能的影响

Sialon是Si-Al-O-N化合物,具有良好的物理、化学性能。在自身试验的基础上,概述了目前Sialon的几种合成方法,探索了反应过程中不同因素(烧结助剂、温度等)对Sialon陶瓷结构与性能的影响,并简单介绍了Sialon的应用。     

吸波矿物含量对微波照射矿石效果的影响

基于电磁热力多物理场耦合,采用fish语言编写耦合程序将有限元和离散元相结合,建立了多颗粒黄铁矿矿石数值计算模型,对微波照射下不同黄铁矿含量的矿石的内部电场和功率密度,温度,裂纹的萌生和发展以及矿石块体的强度变化四个方面进行了研究。结果显示,不同黄铁矿含量的矿石由上至下内部电场强度和功率密度逐渐增大、温度逐渐升高,裂纹由下部萌生并向上部发展,强度随黄铁矿含量的增加而降低;黄铁矿含量越大,其最大电场强度和最大功率密度越小、最高温度越低、裂纹的数量越多、强度变化幅度越小;黄铁矿含量过少或过多均可使矿石升温速率放缓;黄铁矿含量为3%、5%、8%和10%的矿石最佳照射时间为30s,黄铁矿含量为12%和15%的矿石最佳照射时间为20s。