Advanced Materials Research Vols. 524-527

Abstract: A gas outburst dangerous roadway ventilation technology of production safety of the principle (level 2 physical systems engineering) is based on the engineering is the impact of the gas outburst accident caused when the study of consequence. Hypothesis and the parameters of roadway ventilation fan medium irrelevant to the fan characteristic curve, the prominent place and gas outburst intensity with the extension of time increase strong for the parameters of the function known, only now is the first level system of engineering and the above 2 and no vibration during the period of the weight the effect of engineering.

Abstract: As many different size faults in the fully-mechanized sublevel caving mining area overlying rock, undermine the continuity of rock deformation, and the occurrence of different conditions, the impact properties vary widely. This paper studies the impact of faults on the water inrush with specific examples of project, obtained the discontinuous deformation on both sides of fault zone induce the fault zone secondary activate and result in it’s water transmitting ability dramatic increase; with the mining geometry increases, the water flowing-fracture zone height increase and lead to the water conductivity channel of faults connect with rock fracture zone, so as to constitute water inrush channel and likely to cause water inrush accident, so to explore the influence of fault for underground work safety has important theoretical significance and application value.

Abstract: Aiming at the shortage of existing grey relation model, the colliery safety factor evaluation index system is built with the weighted grey relation evaluation model which combines the subjective weighting process and the objective weighting process. The analysis conclusions of the four collieries of Zao Zhuang Coal Mining Co. Ltd show that the evaluation of colliery safety factors based on the weighted grey relation evaluation can make a good division and evaluation for various colliery safety factors, and also eliminate the gray characteristics the colliery safety system owns effectively, thus it can keep evaluation results objective and reasonable.

Abstract: The deposition thickness is one of the most important parameters of debris flow. How to define the deposition shape along the viscous debris flow gully and how to calculate deposition thickness rationally were rarely studied in previous researches. This paper discussed the calculation method of deposition thickness of viscous debris flow based on theoretical deduction. Firstly, force analysis was carried out for a debris flow cell selected from the deposition. Then, the formula for calculating the deposition thickness of viscous debris flow was constructed based on deduction from the viewpoint of theoretical mechanics. At last, the deposition thickness under different slope gradients, yield stresses and densities was calculated based on the deduced formula. The results showed that the deposition thickness decreases with the increasing of the slope gradient and density, and increases with the increasing of the yield stress before the deposition thickness reaches to the maximum value.

Abstract: As one of important technologies of IOT (Internet of Things), WSN (Wireless Sensor Networks) has been used in tunnel environmental monitoring. Tunnel environment monitoring has its particularity that WSN nodes show linear topologies. Traditional routing algorithms in WSN do not consider the linear topology of sensor nodes in tunnel and are difficult to realize long-time data transmission in limited battery power. In this paper, we propose Power Control Dynamic Source Routing algorithm (PC-DSR) by the thought of cross-layer design. Routing table is established according to the distance between nodes and the residual energy of nodes and optimum transmission power is calculated in order to save nodes’ power and prolong the life-time of the whole networks. Simulation results show that the novel algorithm can save node's transmission power, which increase the WSN lifetime of 12.3%.

Abstract: An approach of forklift’s fault diagnostic knowledge acquisition and discrete date based on rough set theory was put forward, according to the rough set theory in fault diagnosis of fault tolerance, the use of rough set theory in fault knowledge attribute reduction and value reduction, as in incomplete fault information of forklift hydraulic system fault diagnosis provides a train of thought. The inferential strategy and process of fault diagnosis of hydraulic system for forklift were described. Examples show that the proposed approach is very effective.

Abstract: This paper discusses the problem of allocating and scheduling quay cranes (QCs). The problem is decomposed into two sub problems. One is QCs-allocation problem, the other is QCs-scheduling problem. The objective is to find an optimal QCs-to-tasks matching and the QCs’ work sequence so as to ensure the synchronous among QCs and then maximizes container terminal’s throughput ultimately. And then for solving the QCs-scheduling model, a novel search methodology based on heuristic rule-modules with different priority is studied. Through experiments the decision-making system for QCs allocating and scheduling is proved efficient and applied.

Abstract: Although traffic development brings convenience to citizen, problems such as parking, traffic transferring, caused by passenger transport hub have aroused extensive attention from society. Based on teasing parking demand hierarchy and willingness choice, concept of expected utility is introduced to uncover logical relationship among transport hub, influence factors, and parking demand. Data about parking facilities and their characteristics, parker desire, characterization parameters related with hub, are surveyed and collected to analyze and confirm the key influence factors on the basis of urban comprehensive passenger transport hub oriented high-speed rail, for setting up the relation model between parking demand at synthesis passenger hub and its impact factors, which is used to propose the forecasting method of parking demand at the comprehensive passenger transport hub oriented high-speed rail.

Abstract: The tug scheduling solution quality directly relates to the fluent degree, based on the analysis of dynamic scheduling business management, the basis of ship waiting time and tug minimum sum overflow horsepower as optimal objective function, establishing the tug dynamic scheduling optimization model. Through introducing the entropy function and the elite, improve the basic particle swarm algorithm, avoid algorithm process into local optimal solution and the port optimization model of the dynamic dispatching management process is also given in this paper. Finally, in a specific case tug scheduling, gives optimal scheduling schemes, and verifies the effectiveness of the algorithm and convergence.

Abstract: Since the problems of environmental pollution and natural resource consumption have become worse, Packaging Industry should take its responsibility of protecting the environment. This article discussed about some serious problems caused by over packaging and made a research on some methodologies on reducing packaging. Among the 3R1D principles, the most important one is “Reduce”. Simplifying packaging could not only both directly save natural resources and reduce environmental pollution but also has a resounding ripple effect across the entire production phase. Through this way, the author tried to find some new solutions to minimize human’s impact to the environment.