以某大型会展博览中心综合体设计案例为例,针对大型复杂的多功能建筑综合体中,将不同功能、不同产业类型用途的空间组合起来的关联空间存在的消防设计问题进行探讨.通过FDS进行安全疏散的性能化分析,并提出水平和垂直空间的防火分区与分隔的局部优化设计方案.

针对当前建筑中火灾应急疏散指示诱导灯具和系统无法根据火灾现场实际情况进行实时调整,难以诱导受困人群按照合理路径实现安全有序疏散逃生的现状,提出了一种新型智能化火灾应急疏散指示诱导控制系统.文章介绍了系统的架构组成,着重研究了其系统软件设计解决方案.运用疏散路径选择优化模型及算法,自动选择出一条最优的疏散逃生路径.经仿真模拟计算,理论上验证该方案合理可行,能够有效地实现人群的安全有序疏散.

For deeply data mining of mass data based on 119 call information from urban fire communication and scheduling platform to automatically realize deep layer information analysis from surface layer data,an automatic reasoning model based on decision tree for analyzing data of 119 call information was designed in this paper,and a kind of experiential knowledge based on 119 call data was also gotten.In the paper,a group of examples wre studied.The analysis indicates that the reasoning model is feasible in theory,and a group of regular experiential knowledge from example analysis of some grave life lose fires can be applied to predict and analyze the fire situation currently.

Technical difficulties of subway fire communication were analyzed.Taking Wuhan Metro line 2as an example,and based on the hybrid networking combining wired and wireless,build a complex communication mode,to satisfy the requirement of subway fire wireless communication.Wired single point and wireless single frequency point were introduced separately.This mode and its engineering program are proved viable and practical by a series of tests.

Based on the existing Zigbee wireless fire alarm detection system,a power control program was designed and used to improve the system,and Zigbee wireless fire alarm detector based on power optimization was achieved.The power control theory and the program design and realization were introduced,and the system power analysis was carried out.Experimental results showed that,the program can not only reduce the detector communication power,and extend the battery life for 10%,and also adaptively select the optimized communication power based on wireless system communication link quality.

利用转移矩阵法研究了含单层负折射率缺陷的一维光子晶体缺陷模的光学特性.结果表明,随着缺陷层厚度的增加,缺陷模的频率呈现分阶段的变化.第一阶段为单调递增,第二阶段为过渡过程,第三阶段为单调递减.这些性质与缺陷层为正常材料的相应结构有很大的不同.尽管第三阶段与之有点相似,但此时移动的速度却较大.研究还发现,整个过程缺陷模移动得比缺陷层为正常材料时要快.

In this paper, we establish some multi-dimensional biochemistry molecular relaxation recognition pattern models for the concentrations of gas mixture constituents versus effective relaxation frequency, multi-relaxation absorption, and acoustic velocity, respectively. Based on these match models and measured parameters, we propose a biochemistry molecular relaxation pattern recognition algorithm to detect concentration of each component in gas mixture. As a sample of carbon monoxide, water vapor, nitrogen and oxygen gas mixture, the simulation results demonstrate that this algorithm can gain the concentration of gas with arbitrary concentration and polar.

For realizing the behavior rules of the microorganisms producing gases and detecting the gas sources for applying bioenergy, a method for the orientation recognition of the gas source and its algorithm is presented in the paper. In the method, the dual-line gas sensor array is applied to sample the signals of the gas concentration in real time, and the time delay estimation, an approach of the signal processing, is used to establish an algorithm for performing the orientation recognition of the gas source. Lastly, the simulations of the method are drawn, which indicates that the method has fine veracity and robustness for recognizing the orientation of the gas source.

Fire source localization is an important direction in the research area of fire detection. For application researches of fire source localization in fire nonage, a method of fire source localization and its algorithm are presented in the paper, via. transforming the task of fire source localization to the orientation detection of gas signal source beneath the certain conditions, in which a mode of dual-line gas sensor array is applied to collect the gas concentration signal in real time when material burning in fire nonage and time delay of the signal obtained from various array elements in the condition of different concentration grads is used to perform the orientation estimation of signal source based on time delay estimation. Furthermore, the simulation of the method is done, and it is indicated that the method has fine veracity and robustness for estimating the orientation of gas signal source and locating the fire source.

An new conception,the design integration of fire protection and emergency in the design of the long underwater tunnel is presented in the paper,in which combining with the fire characters in the long underwater tunnel,the design integration idea based on meta-synthesis,multi-levels and multi-modules are tried to introduce.The new conception is different from the traditional method,due to reconsidering the fire protection design of a type of special function construction,such as the long underwater tunnel,in the new view of the feasibility,synchronization and optimization in the holistic engineering design of the emergency technology.In the following,the method of the design integration of fire protection and emergency,the content of the design integration of fire protection and emergency based on initiative succour,and its key technologies are discussed.

For application researches of the detection for the gas signal source, a method for orientation estimation of the gas signal source in the two-dimensional space and its algorithm are presented in the paper. In the method, a mode of dual-line gas sensor array is applied to sample the signals of the gas concentration in real time, and the time delay estimation, an approach of the signal processing, is used to establish an algorithm for performing the orientation estimation of the gas signal source. Furthermore, the simulations of the method are drawn, which indicates that the method has fine veracity and robustness for estimating the orientation of the gas signal source.

In this paper，we disclose the relations between multi-relaxation absorption and the acoustic parameters when ultrasound propagates in gas mixtures，such as the relation between concentrations of constituents and acoustic frequencies. In the meantime，the dependence of acoustic velocity on the same parameters is discussed. Based on the sample consisting of carbon monoxide，water vapor，nitrogen and oxygen，we establish the three dimensional model for the relation between concentrations of mixture constituents and relaxation absorption and acoustic velocity，respectively. Further more，we give the two dimensional dependence between relaxation absorption and acoustic frequency. We propose a simplified algorithm to calculate the carbon monoxide concentration by measuring the relaxation absorption and acoustic velocity. Simulation results proved the feasibility of this method and showed the appropriate range of acoustic frequency. The origins of errors arising in the application of the method are indicated in this paper.

It is an exciting exploration to research on non-electromagnetic weak signal for signal monitoring and detection in na- ture with many possible challenges. For fast achieving the weak gas signal detection in nonage,and realizing the goals of gas monitoring in real time,a method of signal processing based on rough measure for fast capturing polarization characteristics of weak signal space u- sing the theory of rough set mathematically is presented in the paper,after analyzing uncertainty of weak signal detection. The algorithm based on rough measure for detecting the direction of the gas signal source in one dimension of middle scale space is discussed,and the polarization characteristics such as trend characteristics of signal space are acquired from disorder signal space constructed by sampling signals via the algorithm computing. Then the simulation of algorithm is given in order to show the proposed approach having fine robust- ness,accuracy and fault-tolerance for fast tracking the direction of signal source.

In this paper, we focus on the relaxation process of acoustic waves in polyatomic gases, and build up a multi-relaxation algorithmic model of a gas mixture of nitrogen, oxygen and water vapor. The algorithmic is basing on the complicated transfer mechanism of vibrational-translational, vibrational-vibrational degrees of freedom. By computing acoustic velocity and relaxation attenuation, we notice that changes in water vapor concentration have great influence on the relaxation frequency of the mixture, thus proving the feasibility of detecting humidity by means of relaxation method. Finally, we describe a detailed algorithm to measure proportion of water vapor. This novel approach not only determines the concentration of water vapor, but also reflects the proportional fluctuation of the mixture.

For realizing the rules of microorganisms living behavior and detecting the distribution of its bioenergy, the method research of recognizing feeble biology signal using wireless sensor network for signal detection is discussed in the paper. An algorithm of feeble signal recognition for the gas releasing from organisms is presented, which is based on rough set mathematically. In the algorithm computation, the fractal characteristics of signal space are acquired from disorder signal space constructed by feeble gas sampling signals. And then the simulation of algorithm is given in order to show the proposed approach having fine robustness and accuracy for recognizing feeble biology signal applied in the area of biology information.

In this paper, we focus on the relaxation process of acoustic waves in polyatomic gases, and build up a multi-relaxation algorithmic model of a gas mixture of nitrogen, oxygen, water vapor and carbon monoxide. The model is basing on the complicated transfer mechanism of vibrational-translational, vibrational-vibrational degrees of freedom. By computing acoustic velocity and relaxation attenuation, which is depend on the composition of the gas mixture, acoustic frequency, temperature, and pressure, we notice that changes in carbon monoxide concentration have great influence on these acoustic characteristics of the mixture. Thus it proves the feasibility of detecting carbon monoxide by means of molecular acoustic method. Finally, we describe a detailed model to measure proportion of carbon monoxide. This novel approach not only determines the concentration of carbon monoxide, but also reflects other gases' proportional fluctuations of the mixture, such as water vapor.

随着电气系统火灾逐年呈上升态势,为了进一步加强对电气系统的使用、管理与维护,文章结合电气系统火灾的基本特点,以及当前正在推进的火灾公众责任保险工作,提出了建立电气系统火灾风险评价体系,以用于火灾类保险业务的开展,并且对电气系统火灾风险评价因素集合与风险等级、划分等级、划分等风险评价体系基本内容进行了分析,探讨了电气系统火灾风险与保险费率的测度耦合方法,最后对尽快建立科学规范的电气系统火灾风险评价体系标准进行了展望。

For a safe evacuation of people in fire, which is a serious disaster to damage the security of people's lives and possessions, the fire signal for alarm is accurately detected and recognized in a period of early or extremely early fire time which people wanted in possible. At the same time, the accuracy and validity of fire detection is greatly weakened by reason of increasing uncertainty of fire signal. Therefore a new approach is presented for the detection of uncertainty fire signal based on fire scenario, which its algorithm in the detection of one-dimension fire space is given in order to show the proposed method having fine fault-tolerance, robustness and accuracy. In this method, a certain character of fire space fractal in the detected fire space is obtained firstly by a performance analysis of fire scenario, and then a character of signal space fractal is acquired by using intelligent method based on rough set theory and trend fusion to process the multi-source signal detected from a group of fire detectors, when a logical coincident relationship between the two characters recognized, a real fire alarm is produced lastly

Based on the history evolvement of the building fire protection design methods and ideas,the article analyzed the ancient simple fire protection design method as well as prescriptive design method system under the prescriptive building code.From the ancient case study to the lessons learned from the contemporary fire losses,the article emphasized that with the development of city moderenization and building science as well as the sharp increase of the large and complex buildings,the performance-based fire safety design method based on current fire science and technology has come into being.The article gave a thorough discussion of the method.

The design and establishment of fire scenario can be expressed in logic to establish a style of hypothesis system.The paper analyses the establishing condition of fire scenario,provedes the classifecation of hypothesis of fire scenario(model hypothesis and background hypothesis),illustrates the basic connotation of these two sorts of hypothesis,and discusses the inherent relation between the fire performance-basd design and the conventional prescription design.