This article describes the time difference ultrasonic flow meter measurement principle, by analyzing the ultrasonic flow meter test results, using the theory of Newton interpolation correction calibration constants, s...
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ISBN:
(纸本)9783037851517
This article describes the time difference ultrasonic flow meter measurement principle, by analyzing the ultrasonic flow meter test results, using the theory of Newton interpolation correction calibration constants, solves the problems that the measurement results will suddenly appear more random beating and further improve measurement accuracy of the ultrasonic flow meter.
When dealing with hundreds of components, keeping track of version changes and various dependency constraints imposed on the system, software configuration management (SCM) can be defined as the control of the evoluti...
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The Laser Metal Deposition Shaping (LMDS) is a state-of-the-art technology which correlates the Rapid Prototyping and Manufacturing (RP&M) and laser processing. During this process, a certain alloy is fused onto t...
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ISBN:
(纸本)9783037851319
The Laser Metal Deposition Shaping (LMDS) is a state-of-the-art technology which correlates the Rapid Prototyping and Manufacturing (RP&M) and laser processing. During this process, a certain alloy is fused onto the surface of a substrate. Laser deposition devices, namely powder feeder, CNC worktable, and laser shutter, are integrated to automatically make any cladding profile possible. Material is deposited by scanning the laser across a surface while injecting metallic powders into the molten pool at the laser focus. The metal part is then fabricated layer by layer. The LMDS system consists of four primary components: energy supply module, motion control module, powder delivery module, and computer control module. These modules of LMDS system individually perform the specified functions, but coordinate with each other. One of them, the control module plays an important role in causing the LMDS system automatic and intelligent. The control module can be divided into hardware and software components. The hardware structure mainly includes industrial computer, motors, and motion control card, which build the overall framework, and are driven by software structure. The software structure, namely the system application program with GUI, can instruct every module of LMDS system to finish the motion cooperatively adjust the processing parameters freely, and fulfill the LMDS technology automatically and intelligently. The hardware and software structures work in harmony with each other, thus flexibly controlling the LMDS system.
The Yangtze River Bridge studied in this paper is a three-tower steel concrete structure cable stayed bridge with two sides steel cable, composite girder cable stayed bridge and the largest span between towers in the ...
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Health ontologies are commonly used as the standardization for interoperability between different health institutions. Since health knowledge changes rapidly, health ontology also evolves frequently. A mechanism of ch...
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Health ontologies are commonly used as the standardization for interoperability between different health institutions. Since health knowledge changes rapidly, health ontology also evolves frequently. A mechanism of change propagation is needed to maintain the consistency between the ontology with the dependent artefacts. In this paper, we present the classification of health ontology changes based on their semantic meaning. Based on the classification, we define the basic operations used to perform the changes. Using those basic operations, we develop a method to propagate the ontology changes to one type of the dependent artefacts, i.e. the sub-ontologies which are extracted from the health ontology. We have applied the method to a case study which is based on the SNOMED CT ontology - one of the ontologies mostly used in health information systems. Our propagation mechanism will minimize the need to extract and re-create sub-ontologies from the base ontology every time the base ontology evolves. We also demonstrate that our approach produces a consistent sub-ontology state with the base ontology at any given time by comparing the propagated sub-ontology with the evolved SNOMED CT base ontology.
In a grid workflows, fixed-time constraints are often set at some activities to guarantee that the corresponding activities and finally the overall workflow can be timely completed. At the run-time stage, activity com...
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We propose a novel technique to our knowledge to estimate the beat spectrum linewidth of a free-running heterodyning scheme using an optical discriminator. Utilizing a dense wavelength division multiplexing (DWDM) fil...
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This paper discusses the combination of the classroom-based and the web-based learning according to the Tibetan student's characteristics and the job market to them at present for example of the data structure'...
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Although robotics based flexible automation is an intriguing prospect for small to median enterprises in the era of the global competition, the complexity of programming remains one of the major hurdles limiting its a...
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