Advanced Materials Research Vol. 950

Abstract: This article explains the design idea and implementation method of network equipment configuration status review and optical power detection system by remotely logging on network equipment, gives the comparative analysis result of the two methods of obtaining network equipment parameters, detailed introduces the design method and implementation process to get parameters of network equipments by remotely telnet logging on. System is tested in the practical application. Testing shows that system works stably, has good Real-Time property and high data precision. The system satisfies the requirement and is provided with some popularization and applied value.

Abstract: Design methods of electric motors and reasonable parametric design principles for hybrid electric construction equipments are proposed. In accordance with the power performance, economical efficiency and electric transmission features of construction equipments, the new design method of electric motors which is an advanced application-centric design process are analyzed, and the design theory and calculation method of main parameters are discussed, so that theoretical basis is provided for the research and design of new electric drive construction equipments. Parametric design of a typical dozer drive train is conducted applied the proposed new design method and calculation method. Major components of the power train are modeled using the simulation software Simulink. Based on power track control strategy, the simulation results show that the proposed new design method and parameter design theory of electric motors for hybrid construction equipments are reasonable. It has significance in both theory and practice for the research and development of hybrid electric drive construction equipments.

Abstract: Glass-melting furnace is the most essential equipment in float glass manufacturing, which greatly affects the glass quality and energy efficiency. A three-dimensional simulation model of a float glass-melting furnace including combustion chamber and glass tank is performed in this paper by CFD software Ansys Fluent. To evaluate the glass quality with obtained simulation output data, a new fining index is proposed from the view of bubble elimination in fining zone of the glass tank. The fining index is verified effective in this paper by comparisons between simulation results and actual industry data. The simulation model and fining index then provide guidance for operating parameters optimization and glass quality improvement.

Abstract: This paper employ GMM method introduced in [1] to reevaluate the environment effect of trade liberalization based on the dynamic panel data from Chinese Prefecture City during 1995-2010. We found that trade openness improve the environment quality measured by So2 emissions per capita, emission intensity of so2 and soot while no evidence in Soot emissions per capita. Specifically, even though the effect of import on environment is short-term and unsustainable, the export improve the environment more and more over time. Therefore the environment in China benefit from the trade liberalization regime and export-oriented strategy. In addition, this paper found the evidence of environmental Kuznets Curve and pollution haven hypothesis in some environment index.

Abstract: This paper focus on hierarchical scheduling for real-time applications for open embedded system environments constructed by the total bandwidth server, according to its algorithms, when a job at the head of the server's ready queue completes, the server budget is replenished immediately if the ready queue is not empty. This paper gives some examples to the solutions proposed by Deng et al for a two-level hierarchical scheduling model in which the global level of the system is earliest deadline first, and the local scheduler could be any algorithm. The scheduling algorithms and schedulability analysis for the tasks are reviewed in an open system where the applications could be modeled as executing on a slow processor.

Abstract: . Nowadays, embedded system has been integrated into the various fields of people's life. The contradiction between energy efficiency and time efficiency is more and more seriously. A system with DVFS module can relieve this contradiction. But a lot of researches witch concern about it has kinds of defects. This paper designed a new energy consumption model for a DVFS system and a new simple multi-phase task module for the task generating and processing. Then a dynamic DVFS method was designed to run in our platform with kinds of different types of tasks. We introduced a mechanism with dynamic frequency update interval into our method, and proved that in most cases it can achieve better energy efficiency than other two algorithms which use a fixed frequency update interval. Meanwhile, it can hold the similar time efficiency to the algorithm which makes the best time efficiency in them.

Abstract: The multi station time difference sequence of arrival method is a kind of passive location method for pulse radiation source. It takes the advantage of mass time difference information obtained in a very short time to locate the radiation source. This paper models the time difference sequence of arrival process and estimates the time difference according to the characteristic of the time difference sequence. The simulation results show that, the localization after time sequence estimation algorithm can achieve higher positioning accuracy.

Abstract: N-S equation is basic equation of fluid flow. Based on N-S equation, it deduced two different forms of governing equation which refer to turbulent-stream function equation and stream function equation. It analyzed their characteristics including advantages and disadvantages. The sudden expansion flow was calculated using turbulent-stream function N-S equation and stream function N-S equation separately. The results showed that both of them can have good effects.

Abstract: To study sudden expansion flow, it took N-S equation described by stream function as governing equation and got discrete equations with upwind difference and central difference. The discrete equations are applied to calculate sudden expansion flow. The results showed that when the Reynolds number is lower, stream function distribution calculated with central difference is similar to with upwind difference and that when the Reynolds number is higher, the calculation with central difference becomes unstable, even not converged. It showed that for sudden expansion flow, the upwind difference can simulate well and the results are satisfied

Abstract: This paper studies the problem about scheduling composition of periodic real-time tasks and aperiodic soft real-time tasks in heterogeneous multiprocessor environment. It analyzes the response time of each task in periodic real-time task set and the influence factor about the response time of aperiodic soft real-time task. We use a new mixed scheduling algorithm--UEDF and Task-Centric with Slack Defragmentation algorithm (TCSD) to schedule hybrid task set which consist of the periodic real-time tasks and aperiodic soft real-time tasks. It can improve the timeliness of aperiodic soft real-time tasks response, so the ratio of aperiodic tasks to meet soft deadline will increase.