对高压并联电容器组中单台电容值在线监测的研究

对高压并联电容器在线监测系统进行研究,分析其原理和结构,研制出基于单台电容值监测的在线监测系统。该监测系统所有传感量都可以通过无线方式传输,不用现场布线,安装灵活方便。实际运行表明:对高压电容器组中每一台电容器的电容量的监测精度可以达到0.5级,能够实时的监测电容器的运行状态,实现对电容器故障的预警。     

国有电企市场化员工管理机制存在的问题及对策探析

随着现代化管理思想的不断深入,企业内部业务流程管理、人力资源管理等诸多问题逐渐成为很多传统国有企业改革的关注点。本文针对国有电企实现完全自主的市场化员工管理机制,结合若干人力资源管理理论,提出了一个探索性的思路。     

Design,implementation and self-tuning adaptive control of maglev guiding system

This paper presents a self-tuning adaptive control (STA control) for a magnetically levitated (maglev) guiding system. The guiding system is a repulsive maglev system with a passive carrier and four active guiding tracks. Hybrid magnets exert the levitation forces, whereas the stabilizing forces are produced by electromagnets. Given such a system, an STA stabilizing controller is developed, and the thorough analysis of the stability property is also proposed. It is shown that without precise knowledge of various components, the overall system stability and the regulating precision are assured, which validates the hereby proposed system. From the simulation and experimental results, the performance of the system design and the enforced control mechanism is demonstrated successfully.     

松散介质注浆模拟试验研究

通过在地表对松散介质进行模拟注浆试验,本文考察了不同浆液配比和注浆时间对注浆扩散半径的影响。研究表明,浆液扩散半径与注浆介质结构、注浆时间和水灰比等因素相关。该试验为探明地下注浆工艺流程提供了基础,同时也为地下矿柱群破碎区域的注浆加固设计提供了依据。     

Development forecast of renewable energy power generation in China and its influence on the GHG control strategy of the country

CO₂ emissions of the electricity supply sector in China account for about half of the total volume in the country. Thus, reducing CO₂ emissions in China’s electricity supply sector will contribute significantly to the efforts of greenhouse gas (GHG) control in the country and the rest of the world. This paper introduces the development status of renewable energy and other main CO₂ mitigation options in power generation in China and makes a preliminary prediction of the development of renewable energy in the country for future decades. Besides, based on the situation in China, the paper undertakes a comprehensive analysis of CO₂ mitigation costs, mitigation potential, and fossil energy conversation capacity of renewable energy and other mitigation options, through which the influence of renewable energy on the mitigation strategy of China is analyzed.     

湖北宜化集团殷家坪磷矿双反浮选工艺的研究

针对湖北宜化殷家坪低品位难选硅镁质磷矿,采用阴离子捕收剂MG-7反浮选脱镁—沉降脱泥—阳离子捕收剂T609反浮选脱硅工艺. 在脱硅之前预先脱泥,同时消泡剂TOP和捕收剂T-609搭配使用,解决了阳离子反浮选脱硅过程中泡沫过稳定的难题. 获得品位为33.04%,回收率为69.50%的浮选精矿. 将分离的矿泥并入精矿,混合后精矿品位为30.56%,回收率为78.68%. 相比于传统的正浮选工艺,此工艺不需加温有效地降低了选矿的成本.     

江西赣南地区废弃稀土矿矿山地质环境治理方案研究

文章以江西赣南地区某废弃稀土矿为例,介绍废弃稀土矿矿山及其周边的矿山地质环境问题,按矿山地质环境问题的空间分布进行分区,即采剥区、尾砂堆积区和淤积区。在分区基础上提出整体系统治理的方案,为同类型矿山开展治理修复活动提供参考。     

基于综合功能辨识的城市河湖生态流量计算模型及应用

为了合理确定河湖生态流量的阈值,针对城市河湖功能的特点和实际,综合体现河湖多种生态服务功能目标的协调、河流断面与湖泊/湿地的耦合关联以及生态流量消耗与非消耗分项、存量与通量、水量与水质关系,构建了基于综合功能辨识的城市河湖生态流量计算与保障程度分析模型(MUSEF模型)。利用该模型可对城市河湖生态流量大小、流量过程、流量构成、流量空间分布以及变异性进行量化计算与优化辨识,对不同来水频率条件下生态流量的满足程度进行评价,明确生态流量的调控指标要求与时机,从而为城市河湖生态保护与健康管理提供定量工具。以株洲市区河湖水系为案例开展应用,量化得出了河湖生态流量的逐月过程线、生态流量构成以及变异性特征,分析提出了不同来水频率条件下河湖生态流量的满足程度、调控指标与调控时机,为株洲市河湖生态流量的有效管理和安全保障提供依据。     

楼宇型燃气分布式能源系统SCR脱硝应用研究

能源与环境的矛盾不断深化,能源行业正从传统能源向清洁能源方向转变,因此高效低碳的燃气分布式能源（natural gas distributed energy,NGDE）将受到越来越多的重视;但是随着国家环保要求不断提高,以内燃机为主的楼宇型NGDE项目的脱硝改造势在必行。以某楼宇型NGDE项目为研究对象,分析研究选择性催化还原法（selective catalytic reduction,SCR）脱硝工艺在分布式能源项目应用的可能性;最后项目在小型MW级的NGDE系统得到成功应用,脱硝效率达到95%以上,NO_x的排放值为25.4 mg/m³,烟气脱硝指标达到北京市固定式内燃机大气污染物排放标准,脱硝效果良好,为分布式能源项目脱硝提供了全新的解决方案。     

A method to evaluate the overall breakage degree of pre-weakening processing and its applications

The product fineness indicator t₁₀ and the pre-weakening degree indicator percentage change of A * b value (C_Ab) were used to described the two aspects of the breakage result of processing with pre-weakening effect. However, there lacks a method to evaluate the ‘overall’ breakage degree with a single index. It was observed that when the high voltage pulse breakage (HVP breakage or HVPB) induced cracks inside pre-weakened particles were consumed during impact breakage, the breakage characteristics of the progeny particles are the same to raw ore particles. Based on this phenomenon, the concepts of equivalent size S_ie and equivalent size reduction t_10e are proposed. Raw ore particles of size S_ie is ‘equivalent’ to pre-weakened particles of size S_i in terms of their impact breakage product size distribution. Therefore the value of S_i and the consequently derived t_10e can be used to evaluate the overall breakage degree of pre-weakened particles. The calculation procedure of S_ie and t_10e is demonstrated in the context of HVP breakage. It is found that the impact breakage product of pre-weakened particles can be well predicted from S_ie. In addition to the evaluation of overall breakage degree of pre-weakening processing, this method also has potential to apply in the simulation of comminution circuits with pre-weakening processing and the development of breakage model for processing with pre-weakening effect.