The simulation on damage process of soft rock and hard rock specimens is presented according to the characteristic of rock damage mechanisms under uniaxial tensile test with RFPA(Rock Failure Process Analysis)It mainl...
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The simulation on damage process of soft rock and hard rock specimens is presented according to the characteristic of rock damage mechanisms under uniaxial tensile test with RFPA(Rock Failure Process Analysis)It mainly gives the features of the damage process of soft rock and hard rockThe test results show that the soft rock doesn't occur instability phenomenon immediately under the tension stressMeanwhile, the soft rock appears to damage when it reaches the limit strainThe hard rock begins to break suddenly when it reaches the peak stressBased on simulation and test results, this paper draws a conclusion that the strain change information gives a positive predictive value for the soft rock damage;Moreover, the stress change information gives a positive predictive value for the hard rock damageThe consequence of this paper has a wide range of application value.
Question retrieval is an important module of a question answering system. This paper proposes a conceptual object model and uses it to represent domain question, then defines a method of question similarity calculatio...
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ISBN:
(纸本)9781784660543
Question retrieval is an important module of a question answering system. This paper proposes a conceptual object model and uses it to represent domain question, then defines a method of question similarity calculation on the basis of the model, which divides the calculation of question similarity into four parts the calculation of object similarity;the calculation of attribute similarity;the calculation of relation similarity and the calculation of the rest, finally gets the calculation of question similarity by weighted sum the four parts and uses it to retrieve question. Experiments show the new approach is effective to the question retrieval and can improve the accuracy and out-performs the conventional question retrieval approaches.
Assessment of exergetical performance of a combined organic Rankine cycle and ejector refrigeration cycle is carried out for the effective recovery of low-temperature waste heat. Effects of the turbine inlet and outle...
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Assessment of exergetical performance of a combined organic Rankine cycle and ejector refrigeration cycle is carried out for the effective recovery of low-temperature waste heat. Effects of the turbine inlet and outlet pressure, and turbine inlet and condenser temperature are parametrically investigated on the exergy destruction(anergy) ratio of each component of system and exergy efficiency of the combined cycle. Results show that injector and condenser have second highest anergy after the boiler and source exhaust. The exergy efficieny can have peak values with respect to turbine inlet pressure, while it decreases monotonically with turbine outlet pressure and condenser temperature.
Application-level traffic classification is essential for effective network management and stable service ***,traffic classification methods that are based on the statistical information in a flow have been proposed f...
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Application-level traffic classification is essential for effective network management and stable service ***,traffic classification methods that are based on the statistical information in a flow have been proposed for application-level traffic *** packet transmission order,packet transmission direction,and the packet size in a flow are used as statistical ***,differences in traffic collection points cause inconsistencies in the statistical information of the ***,the analysis results cannot be ***,in this paper,we analyze the limitations on traffic classification caused by traffic collection points,and we propose a novel method for resolving these *** proposed method is verified through experiments conducted in a campus network.
Electronic publishing has become an irreversible trend in publishing *** important step in electronic publishing is to convert a scanned copy or a digital image of a document into editable texts,which is very importan...
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Electronic publishing has become an irreversible trend in publishing *** important step in electronic publishing is to convert a scanned copy or a digital image of a document into editable texts,which is very important to the people with visual impairment,who access the information by means of *** methods for document parsing and paragraph reconstruction only work on PostScript documents with a simple and standard *** techniques are severely limited when applied to documents with complex layout and irregular *** address this issue,we propose a rectangle segmenting approach to make paragraph reconstruction for Postscript documents with complex layout.
Based on the connotative meaning of industrialization and eco-environment, the current situation of Ordos, and the simulated status of the industrialization and eco-environment system, the author chose five kinds of t...
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Based on the connotative meaning of industrialization and eco-environment, the current situation of Ordos, and the simulated status of the industrialization and eco-environment system, the author chose five kinds of typical development patterns to make scenario analysis using SD model. The results showed that: SD model solved the complexity, feedback, and time-varying problems of industrialization and eco-environment system. In the future, Ordos should take the road of industrial economy and proceed resources development and environmental protection coordinately. However, in terms of the discussion of the conclusion and the theory of how to set the various indexes, its effectiveness and correctness remain to be tested by the practice.
Passive rehabilitative training is a type of recovery training which primarily replies onusing an electronic trainer to help patient to rehabilitate by working on the physical property of thehuman *** trainer allows p...
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Passive rehabilitative training is a type of recovery training which primarily replies onusing an electronic trainer to help patient to rehabilitate by working on the physical property of thehuman *** trainer allows patient to complete the rehabilitation even in the situation of beingunable to move independently to enhance the rehabilitative effectiveness of the patients' muscle *** a lower body trainer is designed to only focus on and assist patients who aresuffering from incapability of lower body *** birth of the machine is based on the studyof human's gait pattern which is exceptionally meaningful to the designing and the controllingimprovement plan of the *** study analyzes and examines qualities of human lower bodysuch as the movements,pace,acceleration,the centre of gravity of the body weight as well as thechanges of the joints in order to establish the four degrees of freedom model which made significantcontribution on important data for developing simulation machines and digital controlling system ofsome medical rehabilitation organization.
The scientific and accurate forecast of air traffic flow is not only an effective protection to maintain the air traffic flow continued and unimpeded,and also is an important basis for the air traffic flow management(...
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The scientific and accurate forecast of air traffic flow is not only an effective protection to maintain the air traffic flow continued and unimpeded,and also is an important basis for the air traffic flow management(ATFM) to make decisions and development *** on the character of flow prediction,the prediction method of genetic algorithm to optimize wavelet neural network is *** uses genetic algorithms with the natural evolution laws to conduct the pre-optimized training for the connection weights and stretching translation scales of the wavelet neural network,overcoming the drawbacks of easy to fall into local minima and causing oscillation effect of wavelet neural network with a single gradient descent *** air flow prediction simulation using the GA-WNN prediction model demonstrates the validity of the model.
Giant magnetoimpedance(GMI) sensor has obvious advantages of low cost and high sensitivity compared with many other *** paper shows the current measurement result based on GMI *** setup the experiment system to acquir...
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Giant magnetoimpedance(GMI) sensor has obvious advantages of low cost and high sensitivity compared with many other *** paper shows the current measurement result based on GMI *** setup the experiment system to acquire the data via distance *** the paper shows the theoretical results,which is compared to the real experiment *** the real data analysis results,we conclude that GMI sensor may be calibrated.
This paper proposes a mobile multimedia question-answering system for E-learning. In online learning, it is difficult that students and teachers want to clearly and accurately describe their questions, especially for ...
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This paper proposes a mobile multimedia question-answering system for E-learning. In online learning, it is difficult that students and teachers want to clearly and accurately describe their questions, especially for questions in science and engineering fields. Furthermore, students and teachers are difficult to quickly get involved in the interactive process of each interested question. Besides, the classic questions cannot be accumulated, reused and search. Under the wireless and mobile environment, learners could interact with the question-answering system through multimedia questions rather than traditional text questions. The smart handheld devices are not as well as computer, while it is quite efficient and convenient to capture audio, video and pictures. The question-answering system mainly includes business system, android or ios client and multimedia computing and storage system.
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