棋盘井煤矿16煤安全开采分区及防水煤柱留设

分析了棋盘井煤矿16煤煤层充水水源及通道特征;通过水文地质条件分析利用突水系数法对16煤安全开采进行了分区;通过分析断层的导水特点对矿区内不同性质断层防水煤柱留设进行了计算。结果表明,棋盘井煤矿16煤主要充水水源为底板奥灰含水层,其充水通道为井田内的断层,16煤安全开采临界底板标高分别为812.87 m、967.15 m,断层是该矿主要充水通道,F2断层计算留设煤柱为71 m、FS15断层留设煤柱宽度为43 m,小于10 m的断层应在探明其导水性后,再确定是否留设防水煤柱或注浆加固。     

发挥安全评价支撑作用促进企业安全生产

安全评价作为安全生产监督管理的重要手段之一,起到了有效预防事故、减少人员伤害和财产损失、促进提高企业安全生产管理水平的作用,同时为各级安全生产监督管理部门提供强有力的技术支撑。分析了安全评价的作用,安全评价行业存在的评价质量不高、评价工作不规范、监管不到位等问题,并针对性地提出了改进建议。     

阀门后盖带压钻孔更换主控阀门技术及其现场试验

针对鄂尔多斯盆地靖边气田部分气井主控阀门存在阀板脱落、丝杆断裂等现象而无法开井生产的问题,考虑气井平行闸板阀门结构特点、阀板材质、气体的系统温度和压力等因素,通过理论计算分析和大量的室内模拟试验,提出了阀门后盖带压钻孔+更换主控阀门的新的技术思路,即通过钻穿阀门后盖,顶开阀板,形成通道后实施带压更换闸阀作业。为此,开展了大量的试验研究,并取得了以下成果:①优化了阀门后盖预钻孔尺寸,制定了合理的带压钻孔程序,并设计开发了一套专门的阀门后盖钻孔装置;②系统地对钻孔装置和钻孔程序的可靠性进行了实验验证和完善,确保了该技术在靖边气田现场的成功试验。现场试验结果表明,与压井更换主控阀门工艺相比,该项技术作业过程安全平稳,具有施工周期短、安全环保、不污染地层等优点,为气井主控阀门带压钻孔更换提供了新方法,也为气井安全生产提供了技术保障。     

A new environmental heat stress index for indoor hot and humid environments based on Cox regression

Physical work in hot and humid environments imposes health risks, productivity falling and safety problems on workers. Protection of workers from heat related problems requires quantitative heat stress assessment of the workplace. In this paper, a new index-equivalent temperature (ET) is proposed to measure the environmental heat stress in indoor hot and humid environments. A climate chamber was built to simulate the indoor hot and humid environment. And the safe working time of 144 male volunteers were studied under different climatic conditions in the chamber. Cox regression method is adopted to obtain the impacts of variables on the safe working time. Then the new index-ET is proposed based on the Cox regression results. The correlations between the ET and the common used indexes are determined to test the validity of this new index. Finally the safe working time concerned with the ET is summarized. The results show that the new index gives physiological correlates and physical means. The ET developed in this paper has the potential to be a practical index to measure the environmental heat stress in indoor hot and humid environments.     

智能小区和家居智能化系统设计

在经历了多个智能小区的工程设计实践后,以家居智能化设计为重点,以一幢地下1层,地上2层的别墅为例,总结了家居智能化设计的以下方面:①智能小区和智能家居的概念;②给出家居智能化系统的典型系统图,以及各单元模块的功能和典型配置;③智能住宅设计实施时需注意的问题,包括系统集成及布线等问题。分析了智能住宅运行不正常的原因和注意事项。     

水电站大坝安全监测数据的管理

水电站大坝安全监测的数据是指导大坝施工和运行的科学依据。文章以五强溪水电站左岸库区边坡变形监测的数据为基础，建立了一整套数据管理系统，详尽介绍了系统的功能，特点等，为电站大坝安全监测的数据管理提供了方便。     

谈哈尔滨寒冷地区城市安全问题

居住在寒冷地区城市中的人们将在发生重大安全问题时遭受重大损失。为探讨应对策略,论文以哈尔滨为例,借鉴国际研究成果,探讨了在全面安全观念的指导下,以合理的规划策略为基础,研究了契合紧急安全预案的具体措施、加强冬季救灾准备的方法和加强智能化安全设施的发展方向。合理的规划策略与实施策略相结合,能够大幅度提高寒地城市旧区应对安全问题的能力。     

A deep learning-enhanced Digital Twin framework for improving safety and reliability in human–robot collaborative manufacturing

In Industry 5.0, Digital Twins bring in flexibility and efficiency for smart manufacturing. Recently, the success of artificial intelligence techniques such as deep learning has led to their adoption in manufacturing and especially in human–robot collaboration. Collaborative manufacturing tasks involving human operators and robots pose significant safety and reliability concerns. In response to these concerns, a deep learning-enhanced Digital Twin framework is introduced through which human operators and robots can be detected and their actions can be classified during the manufacturing process, enabling autonomous decision making by the robot control system. Developed using Unreal Engine 4, our Digital Twin framework complies with the Robotics Operating System specification, and supports synchronous control and communication between the Digital Twin and the physical system. In our framework, a fully-supervised detector based on a faster region-based convolutional neural network is firstly trained on synthetic data generated by the Digital Twin, and then tested on the physical system to demonstrate the effectiveness of the proposed Digital Twin-based framework. To ensure safety and reliability, a semi-supervised detector is further designed to bridge the gap between the twin system and the physical system, and improved performance is achieved by the semi-supervised detector compared to the fully-supervised detector that is simply trained on either synthetic data or real data. The evaluation of the framework in multiple scenarios in which human operators collaborate with a Universal Robot 10 shows that it can accurately detect the human and robot, and classify their actions under a variety of conditions. The data from this evaluation have been made publicly available, and can be widely used for research and operational purposes. Additionally, a semi-automated annotation tool from the Digital Twin framework is published to benefit the collaborative robotics community.     

包装的安全性和毒性机理研究

通过物质迁移的成份的分析及实验论述了包装的安全性及毒性机理，对包装使用的安全标准，建立包装材料管理和使用的相关法规依据进行了初步探讨。     

The Art of Drawing

Today, architecture is inextricably linked with drawing. Drawing and representation are generally regarded as the core skills of the professional architect. Architectural theorist and historian Mario Carpo challenges the notion that architecture has to necessarily be an art of drawing. He reminds us that the architect, as a maker of drawings, is in fact a fairly recent cultural and technical phenomenon - only emerging in early 15th-century Italy. Could, then, the digital revolution of the last 20 years be starting to challenge the drawing's hegemony?