鄂尔多斯盆地致密油滑溜水压裂液的研究与应用

北美页岩气等非常规油气资源得到了效益开发,主要的增产手段是滑溜水体积压裂。国内致密油储层改造使用的滑溜水压裂液研究与应用较少,国外产品价格昂贵且技术封锁。鄂尔多斯盆地致密油资源量大,开发前景广阔,其储层条件更复杂,具有低孔、低渗、低压特点,使用常规压裂液改造施工压力高,储层伤害大,改造效果不理想。该盆地黄土塬地貌水资源匮乏,体积压裂备水困难,且大量的返排液增加了环保压力。根据致密油地质特征和工艺需求,合成了梳状分子结构减阻剂DR64,配套优选出高效助排剂和黏土稳定剂,形成了一种适合盆地致密油开发的低成本可回收滑溜水压裂液体系。大量的室内和矿场试验表明,该体系减阻率达到64.1%,有效地减小了高泵压的风险,具有低伤害、携砂性能稳定、低成本可回收重复利用的特点,表现出良好的工艺适应性,为国内非常规油气资源的开发提供了宝贵经验。     

低成本4口百兆ONU光网络单元设计

设计了一种低成本的ONU光网络单元,详细介绍了ONU光网络单元的总体硬件设计方案,包括处理器子系统、以太网交换系统,EPON接口和外围电路设计,对ONU运行的软件系统架构和开发过程也进行了细致分析,最终搭建测试环境对研制的ONU产品进行测试,测试结果表明,研制的低成本ONU光网络单元功能性能可以满足产品应用要求.     

一种低成本大容量实时仿真系统设计

大功率复杂电力电子装置通常需要实时仿真系统来加速装置开发和功能验证。而商业化电力电子实时仿真系统均由国外公司垄断,价格昂贵,系统升级维护费用高。为此提出一种低成本实时仿真系统实现架构,以多片现场可编程门阵列(FPGA)作为并行核心运算单元,有效增加仿真容量和缩短仿真步长。基于该架构自主开发了实时仿真平台,并采用硬件描述语言构建10 kV 12级联H桥STATCOM电路仿真模型进行系统半实物仿真验证。仿真实验结果表明,实时仿真步长可以达到2μs,实时仿真波形与Matlab仿真波形基本一致。     

计算机网络互连的低成本高可用设计

本文主要研究了如何构成低成本高可用的计算机网络的原理和技术 ,包括低成本高可用网络的设计目标和网络通信链路、主机、服务器和网络设备 (如集线器、交换机、路由器 ,还包括程控交换机 )的低成本高可用结构的设计     

安钢炼钢系统低成本运行模式浅析

介绍了安钢炼钢系统低成本运行生产实践,以成本倒逼保零为目标,通过物资采购、库存管理、资源配置的统筹计划,以市场价格为指导进行物料结构动态测算与调整,工艺技术创新与改进,查堵漏洞,推进标准化操作等措施,使炼钢成本得以持续降低,达到资源效益最大化,增强了产品市场竞争力。     

Physical Properties of Plant Fibers (Sisal,Coir) and Its Composite Material with Tamarind Seed Gum as Low-Cost Housing Material

In this study, the physical properties of sisal and coir fibers have been described. Using manual extraction procedures, the sisal fibers were extracted from the sisal plant and coir fibers from the coconut palm. Thermal analysis by differential scanning calorimetry, structural morphology by scanning electron microscopy, and the degree of sharpness of the equatorial reflections of the X-ray fiber diffraction pattern were recorded for the untreated sisal and coir fibers. Tensile strength was determined for the single fiber and the results are correlated with the tensile strength of bundle fibers. Composite material has been prepared with this plant fiber as a filler and tamarind seed gum as a matrix material. The endosperms of roasted tamarind seeds were used for the preparation of tamarind seed gum solution. The different temperature condition maintained for roasting the seeds are 130°C, 160°C, and 180°C. The tensile strength of the prepared composite material is measured and it shows dependency of the roasting temperature condition of the tamarind seed. Scanning electron microscopy and water resistivity test were conducted, and the results were reported for the prepared composite material. Low-cost housing is made using this biodegradable sisal fiber--tamarind seed gum composite material.     

水溶液体系中制备纳米银线的研究

在水溶液体系中,以蔗糖为还原剂、NaCl为前驱体络合剂、PVP为表面活性剂,通过水热反应制备得到了直径大约为40 nm,线径分布均匀、分散性良好的纳米银线。有效解决了目前多元醇有机体系下制备纳米银线洗涤困难,反应条件苛刻,后处理繁琐等问题。系统研究了还原剂用量、还原剂种类、Cl^-/Ag⁺摩尔比、卤化物种类和表面活性剂种类对于产物形貌的影响。结果表明,当还原剂蔗糖的用量为0.18 g,PVP的相对分子质量为58000,选择Na Cl作为络合剂,且Cl^-/Ag⁺摩尔比控制在1.26时,制备的纳米银线形貌均一,纯度较高,纳米线长径比大于1000。     

以管理创新为导向的低成本运营模式探析

以陕西太白黄金矿业有限责任公司打造低成本运营模式为例,阐述了以管理创新为导向的低成本运营模式形成背景、形成内涵、主要做法及形成效果,以实例鉴证了成本管理控制对企业发展的重要意义。其全过程成本管理控制的形成经验,对其他低品位黄金矿山实施成本管理控制战略具有很好的借鉴意义。     

莱钢1000m~3高炉低成本护炉技术

为降低生产成本,莱钢炼铁厂6#1000m3高炉采取了钛球护炉、风口加衬套、加强原燃料管理及铁口维护、监控造渣过程、适时调整送风制度、合理控制煤比和提高煤气利用率等措施,保证了高炉的安全生产和长期稳定顺行,煤比达到187.87kg/t,平均燃料比为507.3kg/t。     

The Applications and Practice of Front Ultra Fast Cooling Technology in C-Mn Steel

Ultra Fast Cooling is a new technology which used to control the hot-rolling strip cooling in recent years on the international developed.It can achieve fast and accurate temperature control in the hot-rolled strip production process to obtain corresponding transformation microstructure and ideal mechanical properties.This article describes the technical principle and layout of ultra fast cooling in hot-rolled as well as cooling features.Analysis the effect of front ultra fast cooling technology in C-Mn steel and obtained consequent on the industrial produced low-cost Q345 hot rolled steel in Panzhihua Iron and Steel.