确保地表建筑物安全矸石充填开采原料配比及充填量的确定

为确定某矿的矸石充填开采过程中最优充填材料配比和最佳的矸石充填量。设计了一种新型的矸石压缩模具,应用该模具和YE-200A液压试验机对十种不同粒径配比的矸石进行压缩试验,得出均匀配比的矸石为最优充填配比。采用最小二乘法拟合的数学模型,确定了均匀配比矸石充填材料与压力的变化规律。最后推出了均匀配比的矸石充填高度与采厚、顶板允许下沉量及顶板压力的函数关系。     

叉车用安全装置的开发

以机械设备为起因的工伤事故中,叉车事故比较常见。首先介绍了日本国内叉车事故的分类统计数据,从硬件设备方面,概述了叉车减灾的主要措施,针对驾驶员在行驶中将肢体伸出驾驶仓外时易发生冲撞或挤压事故的情况,提出了基于光幕及激光扫描器的驾驶员肢体伸出仓外的监控方法。然后根据叉车的不同刹车性能指标,探讨了如何设定检测领域大小的问题。对蓄电池式1.5t叉车进行的实验表明,在检测系统能直接控制刹车的情况下,我们提出的方法是行之有效的。     

松软煤层锚固孔孔底扩孔锚固性能试验研究

针对松软煤层巷道锚杆锚固力低成为制约松软煤层巷道锚杆支护技术发展的瓶颈,提出锚固孔孔底倒楔形扩孔提高锚杆锚固性能的方法,研发了锚固孔孔底单翼扩孔装置,并进行了实验室和井下现场试验,结果表明单翼锚固孔孔底扩孔装置设计的科学性和可行性。通过实验室试验及井下试验得出,锚固孔孔底倒楔形锚固,锚杆的锚固性能至少提高1倍以上,为松软煤层巷道锚杆支护的应用奠定了基础。     

基于S变换的微地震监测中多源信号特征分析

为了提高微地震信号分析的精度,对模拟振动信号进行了试验,得到了时窗因子对ST(S-Transform)时频分辨率的影响,基于ST的良好时窗自适应性和高时频分辨率,进一步将其应用于泸沽铁矿巷道微地震监测数据的处理。结果表明:ST能准确提取信号属性用以构造特征向量,实现了矿山微地震监测中多源信号的量化分类,并为矿山微地震信号的自动识别与分析提出了新思路。     

可燃及有毒气体报警器的规范化管理

科研单位在科研生产中存在着可燃及有毒气体泄漏的危险。基于风险管控要求,通过对中国石化北京化工研究院院本部设置的可燃及有毒气体报警器的统计,分析了科研一线部门和服务保障部门使用报警器的分布情况,介绍了院本部使用最多的报警器的种类及其核心部件气体传感器的工作原理,总结了可燃及有毒气体报警器的安全管理经验,为提升和优化科研单位的安全生产工作提出意见和建议。     

一种海水透明度测量新方法的研究与实现

随着海洋光学探测技术的不断发展,传统的海水透明度测量方法已无法满足当前对海洋环境参数全方位、多角度、动态实时测量的要求.文章依据海水透明度的光度学定义,提出了一种测量海水透明度的新方法,并基于常用的光学器件及测量仪器,设计了一套海水透明度的实时测量装置,介绍了测量装置的安装调节方法.理论分析和实验均表明,该测量装置可以有效实时测量海水透明度.     

Artificial neural network based maximum power point tracking controller for photovoltaic standalone system

This article presents a two-stage maximum power point tracking (MPPT) controller using artificial neural network (ANN) for photovoltaic (PV) standalone system, under varying weather conditions of solar irradiation and module temperature. At the first-stage, the ANN algorithm locates the maximum power point (MPP) associated to solar irradiation and module temperature. Then, a simple controller at the second-step, by changing the duty cycle of a DC–DC boost converter, tracks the MPP. In this method, in addition to experimental data collection for training the ANN, a circuit is designed in MATLAB-Simulink to acquire data for whole ranges of weather condition. The whole system is simulated in Simulink. Simulation results show small transient response time, and low power oscillation in steady-state. Furthermore, dynamic response verifies that this method is very fast and precise at tracking the MPP under rapidly changing irradiation, and has very low power oscillation under slowly changing irradiation. Experimental results are provided to verify the simulation results as well.     

氨水还原剂在燃煤锅炉SCR脱硝中的应用

目前氨水作为脱硝还原剂用于燃煤锅炉SCR脱硝国内尚未普遍使用,尤其在大机组上的应用经验较少。通过对实际应用案例的分析,总结了运行经验,为氨水还原剂在大机组SCR的脱硝应用提供参考。     

The influences of recycle effect on double-pass V-corrugated solar air heaters

The study of the heat transfer enhancement for the recycling double-pass V-corrugated solar air heaters, which implement the external recycle of flowing air, was investigated experimentally and theoretically. The comparison among different designs of V-corrugated, baffled and fins attached, and flat-plate collectors was made to show the device performance improvement with various operating parameters under the same working dimensions. The recycling double-pass V-corrugated device developed here was proposed in aiming to strengthen the convective heat-transfer coefficient and enlarge the heat transfer area. The error analysis of experimental results deviate by 0.85–2.46% from the theoretical predictions with the fairly good agreement, and both results show that the device performance of the recycling double-pass V-corrugated operation is better than those of the other configurations under various recycle ratios and mass flow rates. The suitable selections were obtained for operating recycling double-pass V-corrugated devices while considering with an economic viewpoint by both the collector efficiency enhancement and the power consumption increment.     

餐饮业油烟道火灾研究综述

从餐饮业油烟道火灾事故统计出发,概括了我国油烟道火灾事故分类、事故原因分析、油烟道火灾探测、灭火剂、灭火设备的研究进展,分析了我国油烟道火灾的研究与国外的差距,并指出了我国在油烟道火灾领域存在的问题,最后提出了防治油烟道火灾的思路。