Abstract: In light of current world economics heading towards a direction that demands a refurbished theoretical guidance, Huang, Mu and Huang’s (1990, 1991) “Overall Development of Global Economics” model - also affectionately known as the "4-ways, 2-forms" hypothesis - serves as a research guideline and a basic framework of economical development problems. Economical development throughout the history of mankind has experienced three phases, each phase bearing its own characteristics. While today’s developing countries linger in the era of nature driven self-sufficiency, developed countries have surged ahead into a phase of post-information economy where information technology serves as the backbone of Information Economic Era. At present, the financial disparities between nations often and inevitably produce conflicts driven by socio-economical differences and the resultant ideologies. What are the orientations in economic development for less developed countries, developing countries and developed countries? Why does conflict between them arise and what causes this? How can they be resolved? These have become focal issues of concern among economist.
Abstract: Although the logistics of Beibu gulf (Guangxi) is still in the primary stage such as the small-scaled logistics enterprises, low service level, weak logistics demand, sluggish infrastructure, and the chaotic logistics market, etc, it faces a series of development opportunities, its second-mover advantage is obvious and the growth potential is great. As long as we straighten out the management mechanism, overcome the bottleneck of the system, position accurately, analyze rationally, distribute reasonably, build logistics infrastructure according to the situation of the economic zone, pay great attention to the personnel training and learn from others’ experience, logistics can become a pillar industry in Beibu gulf economic zone.
Abstract: Emergency management theory based on existing research results is studied, and a flexible solution of emergency management information system is proposed. It is divided into five layers: data storage layer, business logic layer, presentation layer, integration web service layer and integration communication interface layer, mainly involving computer software, network communication, information system development and other technologies. The solution proposed will be benefit for developing and achieving the flexibility and integration of emergency management information.
Abstract: To maintain the outlet temperature at the desired set-point, a high-order outlet temperature control model is established for a water condenser, and different PID controller design methods are applied to its temperature control process. The control function model is based on the analysis of the heat balance equation and the heat transfer rate equation. The design process of three different PID control methods, including Ziegler-Nichols Method, Modified Ziegler–Nichols Formula and the Optimum PID Controller, together with the unit step response consequence are provided and compared, and the numerical simulation results show that the Optimum PID Controller has a favorable control performance.
Abstract: To solve the problem that the duration is too long when the change of the measuring process data of industrial real-time database appears slow, the double compression algorithm with linear interpolation of dynamic threshold is advanced. Good compression quality and reduction effect of process data is accessed. The compression and fitting times are less than 1ms, and the compression ratio is 6:1 on the 6000 real-time data compression. The compression time is short, and the compression ratio is high. The fitting error between each fitted value and the original value is within the threshold 1.0. The comprehensive performance is better than SLIM and Swinging Door compression algorithm.
Abstract: For the unsymmetrical bandwidth in HFC network, this paper proposes a data transmission scheme of Cable Modem based on DOCSIS1.1. This scheme can meet different kinds of data’s demands. It can guarantee fine grading data transmission management and low ratio of packet loss. Then, this paper proves the validity of the scheme. Lastly, in order to improve the quality of data transmission, it gives the difficulties and research perspective in the future.
Abstract: A major challenge in sensor network is to preserve the coverage of the sensing network for the maximum possible time. When the density is sparse, coverage needs to be preserved by using energy-efficient route-selection algorithms. Coverage-preserving multi-path routing algorithm has been proposed that conserve energy while increasing the lifetime of routes and keep preserving network coverage.
Abstract: Super alloys is the ideal material for high temperature components although it has a great difficulty to cut, especially drilling. Minimum Quantity Lubrication (MQL) has a good advantage of green, lubricating and cooling effect. Comparison experiments of MQL cooling drilling and pouring cooling drilling were done with coolant holes in drill. The results show that: the maximum measure temperature is less than 100°C and the amount of wear is very small. Internal Minimum Quantity Lubrication drilling is an effective process to solve problems of high temperature and wear fast for super alloys drilling.
Abstract: In this paper, a single fuel in-cylinder, direct injection compressed natural gas (CNG) engine was presented, which was modified form a 175F gasoline engine, with the 80C196KC single chip microprocessor as the controller. The structure and function of the CNG engine control system, the drive circuits of the injection system, matching its parameters and establishing the control algorithms are introduced. An oxygen sensor was used to adjust the mixture ratio to restore the engine power and reduced the exhaust emission; peak-holding drive circuit of injector was applied to improve its responsibility and spare more electrical energy; high energy ignition system was designed to produce and distribute high enough energy. The result of experimental shows that the power of CNG engine is no lower than 95% of the power of gasoline engien in the most conditions. The exhaust emissions of HC and CO are obviously reduced, compared with the gasoline engine.
Abstract: Monitoring systems based on fiber optic technology have proved to exhibit meaningful benefits when compared with the current solutions of an electricnature. A novel low cost sensing system for measuring temperature, strain and pressure based on practical fiber Bragg grating (FBG) to be embedded into concrete is given in this paper. At the same time, the main principles of multi-parameter are introduced. The wavelength scanning demodulation system based on continuous wave tunable frequency is designed. The practical FBG sensors have been successfully used in monitoring cable-stayed bridge’s health monitoring. The system's conception, the adopted sensors network architecture, and the practical installation of a monitoring system based on FBG sensors are discussed. The experimental results indicate that practical FBG sensors can monitor the structure parameters for a long time, as well as have higher stability.