Recommendations for dispatching emergency vehicles under multitiered response via simulation

Emergency medical service (EMS) systems provide medical care and transportation. While many real‐world systems use multiple vehicle types to attend different call priorities, few guidelines exist about which vehicles to allocate in multitiered responses where more than one vehicle is sent per call. This paper makes recommendations for multiple‐unit dispatch to multiple call priorities based on simulation optimization and heuristics. The objective is to maximize the overall expected survival probability of patients classified as “life‐threatening”. We assume two types of medical units and three call priorities; and that information may be updated when the medical unit arrives on‐scene. First, we study the optimal dispatching policies through several examples. Numerical results show that dispatching while considering call priorities, rather than dispatching the closest units, improves EMS system effectiveness. A heuristic algorithm is developed for large‐scale problems. A comparison between the heuristic and closest policy is demonstrated using real‐world data.     

基于富氧燃烧CCS技术对我国低碳发展的研究

本文介绍了低碳发展的理念和实现路径,分析了CCS技术为低碳发展提供了切实可行的技术基础;介绍了燃烧前捕集、富氧燃烧捕集和燃烧后捕集技术,认为富氧燃烧捕集技术综合效益较高,对于发展低碳经济而言或许是一项技术创新的解决方案。     

粗煤气除氧技术探讨

介绍了粗煤气中含氧对后续工艺过程的影响及安全性评估,比较了耐硫变换与脱氧并联设置方案和耐硫变换与脱氧串联设置方案的工艺特点及除氧效果,确定了适宜粗煤气除氧方案.     

多级液氧泵长周期稳定运行分析

多级液氧泵出现事故后对整个化工厂的安全影响非常大。为了减少事故的发生,通过设计方面、管道安装方面和设备运行方面的共同提高,来保证多级液氧泵的长周期稳定运行。     

Experimental evaluation of a distributed Brillouin sensing system for measuring extensional and shear deformation in rock

Distributed Brillouin sensing systems (DBSs) have growing applications in engineering and are attracting attention in the field of underground structures, including mining. The capability for continuous measurements of strain over large distances makes DBSs a promising monitoring approach for understanding deformation field evolution within a rock mass, particularly when the sensor is installed away from excavation damaged zone (EDZ). A purpose-built fiber optic sensing cable, a vital component of DBSs, was assessed in laboratory conditions.A test program was performed to observe DBSs response to various perturbations including strain and joint movements, including opening and shearing of joints. These tests included assessment of the strain-free cable response and the application of extensional and lateral displacement to various sensing cable lengths (strained lengths), from 1 m down to 1 cm. Furthermore, tests were done to evaluate the time-dependent behavior of the cable and to observe the effect of strain transfer using a soft host material (e.g. a soft grout) under lateral displacement.The noise level of the DBSs range was ±77 με, determined through repeated measurements on an unstrained cable. Stretching test results showed a clear linear correlation between applied strain and Brillouin frequency shift change for all strained lengths above half the spatial resolution of the DBSs. However, for strained lengths shorter than half the spatial resolution, no strain response was measurable and this is due to the applied internal signal processing of the DBSs to detect peak Brillouin gain spectrum and noise level. The stability with time of the measurements was excellent for test periods up to 15 h.Lateral displacement test results showed a less consistent response compared to tension tests for a given applied displacement. Although the Brillouin frequency shift change is correlated linearly with the applied displacement in tension, it shows a parabolic variation with lateral displacement. Moreover, the registered frequency response (correlated with strain) of the system decreased significantly when the sensing cable was embedded in a sand-filled tube compared with direct cable displacement.     

CO2汽提法尿素装置低压开车总结

介绍了CO2汽提法尿素装置低压开车的特点与优点,分析了低压开车法的可靠性,总结了低压开车法的操作要点,提出了推广普及低压开车法的建议.     

河库联合调度预报技术探析

贺江流域"2013.8"暴雨洪水期间,通过准确入库洪水预报,以贺江下游重要城镇安全泄洪量为控制,科学合理利用合面狮水库成功进行调蓄错峰,取得良好的防洪效果,分析了开展河库联合调度预报的技术路线及方法,为广泛开展河库联合调度预报服务提供参考及借鉴。     

氟里昂压缩冷凝机组的构成及其工作原理

文章主要介绍氟里昂压缩冷凝机组的构成及其工作原理，进行分析，以便大家详细了解，促进氟里昂压缩冷凝机组的技术发展及技术进步。     

基于办公软件运用的事业单位日常管理

随着信息技术以及互联网的不断提升，信息化的办公软件也随之出现。办公软件的管理功能非常强大，那么，事业单位怎样对办公软件进行有效运用是一个值得人们所关注和研究的问题。本文主要对办公软件在事业单位日常管理中的作用做了探讨，并提出了新时期办公软件的发展方向与加强措施。