Applied Mechanics and Materials Vols. 263-266

Abstract: The level information about manual, semi-manual metering system of mine enterprises is low, and it has seriously affected the economic efficiency of enterprises. This paper research the key technology which is combined the computer network and industrial digital acquisition technology on mine enterprise metering system. First, analyze the measurement system processes, which is combined with the trucking and rail transport, and analyzed incoming raw materials and manufactured products, measuring the flow of information; Then, design the program of measurement system hardware; Finally, design the data collection, Mainly research MSComm control, including the MSComm control programming, communication methods and the main properties of the MSComm control the CommEvent property. The results of this study can be realized on data standardization management, and it also improves the efficiency of work and economic benefits of enterprises with modern management needs.

Abstract: This paper is a summary about recent research progress that describes the basic methods utilizing basic theory and methods of Extenics to mine the knowledge based on transformations in various fields’ database and knowledge base (“extension knowledge” for short) . It’s shown by studies that the existing data mining theory and technology will be developed. These methods can be applied to the fields of marketing, customer relationship management, finance and securities, telecommunication, and medical treatment, etc., which will provide effective decision supports to solve the contradictory problems in these fields.

Abstract: Through the analysis of the characteristics of heterogeneous database of coal mine, design heterogeneous data integration of coal mine system. The application of the data tree model theory is to eliminate heterogeneous model of all the local databases. The mapping relation of global view and each local view is established in the same data model and we can achieve transparent access of heterogeneous data sources by using middleware technology.

Abstract: The concurrent operation of SAD value computing can be actualized by use of the SIMD technology, We give the image organization optimization algorithm of improvement from the image of Single Instruction Multiple Data parallel operation，Such as the idea of oriented object to lead into Parallel operation process that calculated SAD value．through the test result of code device moving forecast for Multi Media extension optimization velocity testing，we know that in current most complex video coding H.264／AVC，the implement of this algorithm can raise the coding speed of encoder obviously，and offer guarantee to realize the video communication of real time in narrow bandwidth.

Abstract: In this paper, we propose a new type of SPC (Stored Program Control) exchange experiment system, which adapt to the reform of the program-controlled exchange technology experiment teaching. The system uses FPGA chip to complete the core of telephone exchange such as timeslot generation, signal tone generation, user calls, voice data exchange functions, it can also achieve secondary development and teaching function expansion through the online programming downloads. The PC software in the system completes the user calls data statistics and analysis function. The experiment system in use reflects its development and convenient, the function is perfect characteristics, and has good application prospect.

Abstract: This paper solves the problem of high detection complexity of continuous phase modulation (CPM) signals over additive white Gaussian noise (AWGN) channel. A complexity constrained sequence detection method for CPM is provided using breadth-first maximum-likelihood sequence detection. The derived result is to reserve only those states which are closest to the received signal in the Euclidean distance after retain one best path for every state. Compared with the maximum-likelihood detector based on Viterbi Algorithm (VA), a significant reduction in complexity is obtained by the suggested detector while maintaining good performances.

Abstract: Due to the negative effect of li-ion battery monomer inconsistent performance in electric bicycle, a low-cost intelligent li-ion BMS (battery management system) is designed based on atmega16. Multi-channel analog switch and differential amplifier are used for multi-channel data acquisition, and the equalization circuit is used for the balance of each single cell. The results show that the design can realize the intelligent management of li-ion battery.

Abstract: Leaf thickness is one important index of describing plant growing conditions. But the measurements now are all tedious and destructive. In order to carry out real-time, live, non-destructive testing of leaf thickness, the study took cotton leaves as the research object. The correlations of leaf thickness with reflectance, vegetable index and spectral figure index were analyzed separately. And then the cause of correlation was studied. Three regression models were set up with the 3 parameters which had high correlation with leaf thickness. Among these models, the highest relative error is 7.4%, and the RMSE is 0.051 mm. It is feasible to measure alive leaf thickness untouchably with Hyper spectrum.

Abstract: Geophysical measurement relies on the positioning accuracy of GPS (global positioning system). Usually the positioning accuracy is area dependent. This paper uses a commercially available GPS receiver to verify its positioning accuracy with practical measurement in a small area. With a measurement setup in an open ground, the results show that even for the fixed point, the GPS measured positioning error of about 0.234 meter could be observed for a period of time. Of 12 GPS measured distance errors, only one is about 5.7 meters, all others are within the range of 3-5 meters of GPS receiver specification.

Abstract: A rapid droplet-to-droplet microextraction method on a piezoelectric substrate was presented. A pair of interdigital transducers (IDTs) with 27.5MHz center frequency was fabricated on a 128° yx-LiNbO3 substrate using microelectric technology. A RF signal generated by a signal generator was applied to one of the IDTs to excite surface acoustic wave. When hit a droplet on the piezoelectric substrate, surface acoustic wave was radiated into the droplet and acoustic streaming was occurred. Droplet-to-droplet microextraction was enhanced due to the acoustic streaming. An ionic liquid and an organic dye solution were used for extraction experiments. Results show that the extraction time is decreased with RF signal power. In addition, extraction kinetics was also studied using an image-based concentration measurement technique.