Applied Mechanics and Materials Vols. 556-562

Abstract: In order to complete road identification, dynamic identification interval is built according to the six typical road adhesion coefficients which don’t overlap with each other, using road adhesion coefficient as its parameter index under Burckhardt model. It’s concluded from simulation tests about single road and variational road based on brake single wheel model that this method is capable of managing to conduct road identification accurately and immediately, realizing automatic identification under real-time slip rate and correcting identification errors automatically.

Abstract: The paper deals with the monitoring system based on Zigbee wireless sensor network technique in details. The system adopts single-chipped microprocessor ZIC2410 radio frequency chip. By the upper computer software and programs of various physiological data acquisition, the physiological data of warded people, such as the pulse, blood pressure, blood oxygen saturation and electrocardiogram, are gathered by the PC software in real time, and then the collected data are transmitted to the remote medical monitoring center through the wireless sensor network. The data information of each node, including the location and health status of the warded people, can be displayed by the monitoring center software. It makes timely and effective medical guidance possible.

Abstract: A system for detecting the conditions of crop disease stress by acoustic emission technology was studied and developed .The PCI-2 acoustic emission board and R15 acoustic emission sensor probes were chosen to construct the hardware detecting system, and the AEWIN software and virtual instrument technology were utilized to construct the software system, a real-time acquisition and detecting system for the information between acoustic emission and disease stress of crop was established. The results show that there are a certain physiological cycle laws in the acoustic emission of healthy crop, generally the “double peak area” can appear; but distortion can occur in the acoustic emission of disease stressed crop, a sharp increase of the acoustic emission frequency can suddenly take place at some time, immediately the crop begins to show disease symptoms, and acoustic emission signals lose the regularity.

Abstract: Low permeability of fast-growing eucalyptus wood restricts its high value in use. In order to explore effective ways of improving the permeability of eucalyptus wood, the method of applying microwave radiation to Eucalyptus urophylla (Eucalyptus grandis×Eucalyptus urophylla) is used to promote its rapid evaporation of water, by which vapor pressure highly increases inside, then vapor bubbles break through the weak points of the wood tissue, as a result, the permeability of the wood is improved. Under the same conditions, wood was tested to achieve the results of water absorption rate (WAR) and water loss rate (WLR) in water sorption measurement and saturated suction drying experiment respectively, after which the permeability, the modulus of rupture (MOR) as well as the modulus of elasticity (MOE) of the test wood are recorded. The results show that the WAR and WLR of the microwave treated wood is higher than that of the untreated wood. Thus it is concluded that microwave radiation can improve the permeability of urophylla wood. But the time of microwave pretreatment has a significant effect on the WAR and WLR, which may be associated with lower microwave power and the variability of the tested material. MOR and MOE of the test material did not change significantly after the microwave treatment.

Abstract: Face the reality application in the "information island" problem, based on the analysis of the data exchange between heterogeneous database conflict, on the basis of this paper proposes a data exchange model in XML as middle format. Make full use of the XML is easy to extend, good interactivity and semantic is strong, can be formatted, easy processing, has nothing to do with the platform, and other features and advantages, and USES the c # language and XML and related technologies of the model carried on the detailed design and implementation of the main modules, and each function module in the model are relatively independent and extensible, strong commonality.

Abstract: In this paper, from the perspective of XML data management, first in the HDFS store large amount of data and XML data based on XML data query rewrite the traditional framework of MapReduce process, the design of large amount of data XML data set keywords retrieval algorithm, contain XML data classification and coding, index and search a four parts, solve the large amount of data of the XML document keywords retrieval problem. Then the design and implementation based on MapReduce of large amount of data XML keyword query system.

Abstract: For many government departments or enterprises to use new system upgrades, data transfer between heterogeneous database problem, this paper puts forward a kind of heterogeneous database based on XML and middleware model of data migration.The model by using XML technology to build a middleware, through the ODBC interface connected to the source database and target database.After extracting data from the source database into a unified XML documents, again according to the mapping relationship between old and new database and XSL document, and converts it to meet the needs of the target XML document, the target database and load the data to the target database.The model including data extraction, transformation, validation, write, and other functions, is a cross-platform, easy extensibility and reusability.

Abstract: This passage is to put forward knapsack problem optimization algorithm based on complex network (KOABCN). Knapsack problem has extremely wide application in a great number of fields. For instance, knapsack problem can be applied in information coding, budget control, project choosing, material cutting, cargo loading and unloading as well as Internet information safety. Since 1950’s, knapsack problem has been one of the most heated topics in algorithm and complexity research. Therefore, knapsack will still be largely focused in the next period of research.

Abstract: A platform of spatial estimation, which is based on Matlab GUI, was established. We use Matlab to do analysis of different parameters (Signal-to-noise ratio, the number of snapshots, the number of antenna elements, the number of targets) and simulate the results with different algorithm. In addition, we use a Matlab GUI to present the results of simulations in a interface-friendly way.

Abstract: The algorithm of DOA estimation for non-uniform linear array with Parallel Factor (PARAFAC) and power loading is carried out detailed studies and simulation in this paper, and we use Trilinear Alternating Least Squares (TALS) estimation algorithm to estimate the DOA of signal source. In addition, we make a simulation analysis and comparison of different parameters (Signal-to-noise ratio, the number of snapshots, the number of antenna elements, the number of targets, the similar angles) and different algorithm. Finally the thesis summarizes the work.