Effect of Biochar as Reductant on Magnetizing-roasting Behavior of Pyrite Cinder

The effect of biochar substituted for anthracite as reductant on magnetizing-roasting pyrite cinder was investigated.The key of magnetizing-roasting is the gasification reaction between reductants and CO2.Since biochar could react with CO2 more rapidly at lower temperature,the reactivity of biochar is better than that of anthracite.The gasification of biochar could produce reducing condition ofφCO/(φCO+φCO2)about 10%-20% between 700-800 ℃,which is in accord with the atmosphere and temperature of Fe2O3 reduction.So it is beneficial to the reduction of iron mineral of pyrite cinder.Compared with anthracite,biochar could decrease the roasting temperature from825 to 750 ℃ and roasting time from 20 to 15min,which shows that a better effect of magnetization could be obtained in the condition of lower temperature and shorter time.Using biochar as reductant,iron concentrate extracted from pyrite cinder as about 64%iron grade could be produced,and the recovery is over 90% under the condition of above 90% grinding particle less than 0.045 mm and magnetic intensity of 0.124-0.194 T.     

多级脉冲深穿透射孔技术

目前国内较先进的射孔工艺是增效射孔和三相流射孔,这2种射孔工艺均存在射孔深度和造缝深度浅的问题,尤其是对低渗油藏和纵向渗透率远大于横向渗透率的油藏,此造缝深度并不能满足油田生产的需要.介绍了一种新型的射孔技术,它是一种能进行深度射孔造缝的多级射孔技术,利用三级推进剂燃爆时产生峰值不连续的高温、高压气流,形成多级脉冲,多次冲击射孔孔眼前沿的裂缝,使其有效延伸至地层深处,从而较单独的射孔更能有效地增加油气产量.通过地面水泥靶的试验,证明了该射孔器的延缝功能和安全性;通过塘32等井的现场试验,证明该射孔技术对污染地层解堵有显著效果,可明显地降低地层破裂压力.     

三星激彩 舞动天地

离开了色彩的世界是无法想象的,如今各种彩色显示设备已构成了彩色链条,但这个链条并不像乍看起来那么完整,因为彩色输出在此链条中缺席已久.     

基于DSP的闭环光纤陀螺研究

提出了一种基于DSP的全数字闭环光纤陀螺设计方案。文中对该闭环光纤陀螺的A／D、D／A等部分间的时序逻辑进行了设计和实现。讨论一种通过反馈调整D／A的基准电压来实现对2π复位不准确的控制。给出几个重要参数的测定方法和实验结果。     

《大学信息技术基础》课程教学改革的研究

通过对福建省内高中信息技术相关课程及福建省内外《大学信息技术基础》课程设置的调研,针对当前《大学信息技术基础》教学过程中存在的一些问题,结合自己的工作实际,提出改革教学方式、方法,更新教学内容等,提高计算机基础教学质量和教学效果,以适应创新型、应用型人才培养的社会迫切需要。     

Low‐voltage and high‐transmittance blue‐phase liquid‐crystal device with slanted electrodes

Abstract— A low‐voltage (～10 V_rms) and high‐transmittance (～90%) polymer‐stabilized blue‐phase liquid‐crystal (BPLC) device with a slanted‐electrodes structure is proposed. Unlike the vertical‐field‐switching (VFS) mode in which oblique incident light and a vertical field are employed, the proposed device utilizes normal incident light and an oblique field. The slanted electrodes generate a strong and uniform oblique electric field, which contributes in obtaining low voltage and high transmittance. Moreover, no couple films or prism sheets are needed, which helps to enhance the optical efficiency and simplify of the device structure. This device has great potential application for emerging BPLC displays and photonic devices.     

胶片电影中的快速斑块修复算法研究

斑块是胶片电影中最常见的损伤类型问题,传统的斑块修复算法修复质量较好,但修复速度不够快.针对传统斑块修复算法在修复速度上的不足,提出了 一种改进性的快速斑块修复算法.相比于传统修复算法的改进主要体现在运动估计模块和修复模块.运动估计模块使用权重系数矩阵对二维匹配块矩阵做降维处理,得到两组一维特征矩阵,使用一维特征矩阵代替二维匹配块搜索运动矢量最优值.修复模块使用单参考帧修复算法代替双参考帧修复算法.实验结果表明,快速斑块修复算法与传统修复算法相比,主观评价基本一致,修复速度优于传统修复算法.     

Concepts,processing, and recent developments in encapsulating essential oils

By the virtue of their olfactory, physicochemical, and biological characteristics, essential oils (EOs) have drawn wide attention as additives in daily chemicals like perfume or personal care products. Nevertheless, they are physicochemically unstable and susceptible to degradation or loss. Microencapsulation offers a feasible strategy to stabilize and prolong release of EO. This review summarizes the recognized benefits and functional properties of various preparation and characterization methods, wherein innovative fabrication strategies and their formation mechanisms are especially emphasized. Progress in combining detecting/measuring technologies with kinetic modelling are discussed, to give an integral approach of controlling the dynamic release of encapsulated EOs. Moreover, new development trends of EOs capsules are also highlighted.     

焦化污水生化处理系统的改造

介绍了焦化污水生化处理系统的改造、开工、调试和运行情况．讨论了处理过程中的影响因素、操作管理经验以及污水处理工艺的特点和发展前景。