从金矿浮选尾矿中回收绢云母的试验研究

研究采用浮选工艺回收金矿浮选尾矿中绢云母的工艺条件。研究结果表明，采用十八胺和煤油为捕收剂、水玻璃为抑制剂、硫酸为调整剂及一次粗选、一次扫选、两次精选的工艺流程对尾矿进行处理，可分别获得一级、二级、三级绢云母产品，绢云母总回收率为65．84％。     

Bubble size measurement in three-phase system using photograph technology

A special experiment setup was designed to observe the interaction between bubbles and particle in flotation cell and to analyze the bubble characteristics such as bubble size, distribution and bubble-loading efficiency. Bubbles in water-gas system and three-phase system were measured. The results indicate that with the current setup the bubbles as small as 10μm can be easily distinguished. The average size of the bubbles generated under the given conditions in two-phase system is 410μm at frother concentration of 0. 004%, which is in good correspondence with the results of other works. The effect of frother on bubble size was probed. Increasing frother concentration from 0 to 0. 004% causes a reduction of bubble size from 700 to 400μm. The bubble loading efficiency was reported. The result indicates that the fine particle is more easily entrapped than the coarse particle. Some factors, which have effect on measurement accuracy were discussed. The aeration speed has a significant effect on the accuracy of results, if it surpasses 30 mL/s, and the image becomes unclear due to the entrapment of fine particle. Another factor, which can affect observing results, is the sampling position. At a wrong sampling position, the images become unclear.     

New Rate Allocation Method for MPEG-4 FGS Video Streaming

A new rate allocation method for fine-granular scalability (FGS) coded bltstreams is presented in order to achieve smooth quality reconstruction of frames under channel conditions with a wide range of bandwidth variation and improve the average PSNR of the whole sequence. Based on a quality weighted bit allocation method, a sliding window rate allocation method is proposed for the first time so that the window can slide along the video sequence with a certain sliding step. Experimental results show that, under dynamic bandwidth conditions, the proposed method can simultaneously satisfy the requirements for improving average PSNR of the whole video sequence greatly and reducing the fluctuations between adjacent frames greatly.     

用改进的单片再生剂量法测定多矿物细粒黄土的等效剂量

应用单片再生剂量法对陕西关中的全新世黄土进行细颗粒蓝光释光、红外释光和红外之后的蓝光释光的等效剂量De测定，在实验中用一固定的实验剂量（Dt≈(10%-20%)De)的释光信号来校正灵敏度的变化。在这3种释光信号中，红外之后的蓝光释光信号较为稳定，其De值较接近预测值。说明预先红外暴露去除了低能量的陷阳电子，剩下了稳定的高能量陷阱电子。     

细特纤维织物和普通织物的性能对比分析

概述了细特纤维的性能和应用、并在大量对比试验的基础上，分析了细特纤维织物的力学性能、外观保持性和舒适性。     

Pid Performance Tuning Methods For A Robotic Manipulator Based On Iss

This paper proposes performance tuning methods for a PID controller for a robotic manipulator. The design procedures of an inverse optimal PID control method employed to assure extended disturbance input‐to‐state stability (ISS) are suggested. The performance tuning methods for an inverse optimal PID control are derived from the performance limitation and the bounds of the state vector. Also, the effects of proportional and integral gains are considered in evaluating the performance tuning. Finally, we show the validity of the performance tuning methods through the experiment on a robotic manipulator.     

Extracting gold from pyrite roster cinder by ultra-fine-grinding and resin-in-pulp

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沉积微相图的自动绘制技术

沉积微相研究是开发地质研究的重要环节,准确的沉积微相是储层物性展布模型接近油藏实际的重要保证。论文在推广的地质建模软件Earthvision深度开发的基础上,提出了沉积微相图自动绘制的技术方法,并应用用户自主开发语言完成了软件模块的编制。实例应用检测效果良好,这表明提出的方法实用性较强,克服了目前开发地质研究过程中沉积微相图件制作仅根据储层厚度的大小来简单划分造成的精度不够,无法满足储层分布模型要求的缺陷,对于改善开发地质的研究手段、提高模型建立精度具有重要意义。     

应用细旦涤纶短纤开发新产品的实践

基于细旦涤纶短纤生产高支高密织物的实际生产过程，分析了采用国产传统设备进行生产的难点．细旦涤纶短纤在纺纱过程中产生的棉结多且大，高支高密织物的织造难度大．针对这些问题提出了相应的技术措施：纺纱工艺以减轻纤维损伤、减少棉结、减少毛羽、改善纱线条干为攻关重点；准备工艺以严格操作、均匀控制张力、渗透与被覆兼顾上浆为工艺要求；织造的上机张力宜小，投梭宜迟，车速中等掌握．实践证明，技术措施得当，保证了生产效率和产品质量．     

综合分析优化浆料配方

针对１０ｔｅｘ纯棉经纱和１３ｔｅｘＴ６５／Ｃ３５涤棉经纱，选用５种浆料配方，在测定浆液和浆纱性能１２项质量指标的基础上，运用浓缩映射法和功能评价值对实验数据进行处理，并进行上浆成本核算，综合分析优选出最佳的浆料配方．投产后，织造效率由８２．４％提高到９３．６％．