Advanced Materials Research Vols. 779-780

Abstract: Inefficiency upper bounds are explored in stochastic traffic network. Equilibrium flow pattern therein is deduced by a central Stackelberg strategy and tax schemes imposed on each link.. The equivalent variational inequality (VI) for Logit-based stochastic user equilibrium (SUE) model is established and first used to obtain upper bounds on Stackelberg network inefficiency under the assumption of separable, nondecreasing, and convex link time function and of fixed network origin-destination (OD) demand. For typical Bureau of Public Roads (BPR) functions and its affine forms, the upper bounds of their inefficiency are investigated with some meaningful results.

Abstract: Accurate measurement of the concentration of pulverized-coal in various pipes as a guidance to proper control plays a key role in assuring safe and economic operation of a pulverized coal-fired boiler during the combustion process. Experimental studies are carried out on the measurement of a lean mass flow in a pneumatic conveying pipeline using electrical capacitance tomography (ECT). A cyclone separator is employed in this system where the sensors are placed in order to compensate the inhomogeneity of the sensor sensitivity. The distribution of void fraction in radial direction, the average void fraction and the wavy characteristics are analyzed. The feasibility and reliability of the method are verified by the experimental results.

Abstract: A single mode of transportation can not satisfy the agile manufacturing, rapid response from the customer demand, logistics supply chain management, and many other aspects with the rapid development of economy. Multimodal combined transport provide the corresponding solutions. Multimodal combined transport helps to save transportation costs or to save transportation time. And multimodal combined transport has a great significance to improve the transportation service level ,to strengthen competition ability, to improve social comprehensive benefit. This article give an example from Liuzhou to Guangzhou. This article make a detailed scheme of Multimodal combined transport. In this paper, integrated transport path optimization model of multimodal combined transport of is set up with linear programming method. And integrated transport path optimization model is solved.Key words:Multimodal combined transport,Path optimization, Linear programming method

Abstract: When catastrophic events occurred, evacuation is important in the urban areas. The uncertainty of the incident should allow the system to be changed based on the new information. If the varying capacity and transport time of road network and priority evacuation areas are known, by CCRP (Capacity-Constrained Route Planning) evacuation strategies can be obtained. The paper highlights the need to evacuate a source point owing to unexpected increased population, on the basis of the original strategy, and the model can produce real-time evacuation policy information and guide the population to evacuate as soon as possible.

Abstract: To provide a high efficiency, high benefit, integrated logistics service for shippers, based on the thought of supply chain management, used the open and closed queuing network model of the maritime queuing network to calculate the optimal port services efficiency. The achievement in research of the thesis is of great theoretical significance to planning and resource allocation of port, and selected ports by the ship and cargo owners.

Abstract: Abstact: Based on the damage of five corrosive bridges concrete in Shanghai, it suggested that the strength and durability of C30 concrete have decreased seriously. These years, a lot of bridges, overhead roads and tram roads have been built, so the study on anticorrosion technology of reinforced concrete bridge will assuredly become a pressing issue. The main measure in this article is to design the durability of concrete aiming at the reasons why durability decreases at the different environmental conditions. The results of the research suggested that the over-replacement with active mixture technology could assuredly make Cl- penetrative resistance, freezing and thawing resistance and carbonizing resistance improve. It was best when coefficient of over-replacement was 1.3, and slag was best followed by steel slag, and then fly ash. Furthermore, the over-replacement with active mixture technology could stay concrete forepart shrinkage rate, thereby improving the durability of concrete.

Abstract: In this article, through analysis of the status analysis of road greening, and the road reconstruction of Qingfeng road, described the importance of road greening of the villages and towns and the problems facing. The eighteen major report to promote the integration of urban and rural development as one of five major accelerate the improvement of the socialist market economic system and accelerate the transformation of economic development mode. Road greening is an important part of the urban and rural construction, and also the Important space landscape factor of urban and rural environment. In The Eighteen Major report, the signal about accelerated process of urbanization builds confidence for the rural and urban roads greening. Road greening can not only beautify the environment, but also can purify air, reduce noise and other ecological effect. Today, society pays more and more attention to the quality of the environment space; the Eighteen Major also emphasized the environmental protection and governance, advocated to build green ecological living space. Rode as an important part of environmental space, the road greening has become the focus. Road greening have special significance in the urban and rural planning.

Abstract: This paper conducts an in-depth research on applications reliability in highway network planning and optimization of construction sequence. It introduces the concept of reliability to the layout of the importance of the road network node and establishes a fairly comprehensive theoretical method of highway network planning based on the reliability from the aspects of the road network layout, evaluation, and construction sequence arrangements. Case study illustrates the proposed layout optimization method has achieved satisfactory results in the road network reliability analysis, displaying strong practical promotional value.

Abstract: In order to solve the problem of automobile rear axlewelding equipment with the low level of automation,the poor accuracy, the poorefficiency, a automatic girth welding machine with dual-arm for automobile axlehas been developed based on PLC. Thewelding Proeess automation is realized by PLC controlling gun movement. Theautomatic welding machine has the characteristics of high control precision,good security, fast response speed, high degree of automation, improving weldingquality and production effieiency, lowed serap rates, eonvenient operation, easymaintenance, in particular to improve the working eonditions of workers and improveproduetion effieieney has obvious praetical signifieanee.

Abstract: This design is an implementation method based on the "automatic obstacle avoidance car", which gravitational potential energy can be converted into mechanical energy and driving as the motivation .This car can automatically avoid obstacles on the track settings in advance. The greatest feature of the car is during its operation, accelerating first then maintaining a constant speed, so that less energy consumption are required. Besides that, the walking track is closing to the sinusoidal curve. The convenient manufacture has a simple structure as well as high transmit efficiency.