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Virtual reality technology has been adopted in the study of three dimensional virtual reality (3DVR) digital information platform for shearer. An improved progressive mesh simplification algorithm for 3D real-time level of detail rendering of shearer based on half-edge collapse was proposed and a 3DVR digital information platform for shearer was established in Virtools platform based on real-time...
Aimed at the limitation that current statistical process control method are effective to only one fixed extend shift, a kind of robust control chart is proposed and the average product length calculating method of control chart is also discussed in this paper. Then, an optimal design scheme of the robust control chart is discussed. Comparisons of average product length of the robust optimal design...
Computational fluid dynamics (CFD) software FLUENT 6.3 has been employed in the present work to study the flow field and mixing process in a stirred tank equipped with four side-entering agitators. The multi-reference frame (MRF) and standard k-ε turbulent model were used in the simulation. The effects of tracer feeding, detecting positions and impeller speeds on mixing time were investigated. It...
This paper analyzed the status of networked manufacturing technologies, put forward new networked manufacturing mode based on the integration of ASP and CPC; constructed the overall framework for designing system under new networked manufacturing mode; integrated service and function from CPC based previous ASP networked manufacturing mode with deeply analysis about these service and topology structure,...
This paper takes Tianxingzhou bridge health monitoring system for example to illustrate its integration research and implementation. Multithread technology of LabWindows/CVI which is a development environment for virtual instrument is applied in the paper. The data request, data acquisition, data processing and storage can be carried out simultaneously in multiple threads. Assigning a reasonable schedule...
Piezoelectric ceramic (PZT) transducers, which can be surface-mounted on or embedded in structures, are widely used for structural health monitoring. Since they are only sensitive to cracks nearby, the use of ones pasted on structures' surfaces may not be able to detect accurately the deep damages especially in large size structures. Therefore, the embedded PZT transducers display more advantages...
A damage identification method based on improved genetic algorithm (IGA) is presented that accurately identifies both the location and severity of damage in a simulated 3-span continuous beam bridge. Damage identification based on finite element model updating is often used and damage is identified by minimizing the error between measured and analytical results. But whether model updating can be carried...
Damage diagnosis and health monitoring of large-scale structures are becoming a hot research subject in the present structural engineering circle. Elman neural network is presented to identify and locate the crack damage of a radial gate located in the middle reaches of the main stream of the Jialing River. This method is an aggregation neural networks and pattern identification. And also make the...
The paper first analyzes the seasonal variation law of subgrade resilient modulus and water content, and then summarizes the common quantitative adjustment methods, calculation of the equivalence of resilient modulus based upon damage equivalence, for resilient modulus of subgrade in the process of season alterations. Finally, the paper puts forward a seasonal readjustment calculation formula for...
The application of FRP screw anchor, geogrid, geofoam slab and geosynthetics clay liner (GCL) in repairing slide of canal slope of expansive soils has been introduced in this paper. The FRP screw anchor was used to anchor the concrete frame girder above the berm and concrete slab below the beam, the geogrid improved the factor of safety against complete sliding surface, the geofoam slab was used to...
This paper reports an investigation into the use and application of remote sensing data for monitoring the environmental impacts of open cast coal mining in ATB. This investigation is based on the digital analysis of Landsat and HJ-1 images acquired from 1976 to 2009. The characteristics of the imagery enable quantitative analysis of different open cast mine features, such as open-pits, change of...
On the basis of engineering geological analysis method, the stability of a certain steel plant foundation in the underlying mined-out area is evaluated. In accordance with the loading concentration of steel plant structures and their importance, a classification is carried out and different grouting treatment measures are used accordingly. Afterwards, XB-160-foot vibrating wire strain gauges and XBHV-10-foot...
This paper outlines the factors contributing to increased water age in distribution systems. Water age is a function primarily of water demand, system operation, and system design. Tracer studies have been performed to calculate water age throughout a distribution system, calibrate water quality and hydraulic models, and to enhance the study of water age in relation to water quality parameters such...
With the rapid development of urbanization, urban construction, every aspect of a great development. Urban housing has also been greatly improved, while the living environment have become increasingly demanding. Concentration in urban traffic caused by an increase in traffic safety, air pollution and noise pollution, etc., all affect the urban living environment. This paper studies the urban road...
Experiments of agitator properties are required a lot in process industry. A more efficient, practical and lower cost experimental system is demanded. In this research, a new type of quick convertible agitating system was designed which had a unique structure combined turning bracket with available impeller to enhance the prosperities and efficiency of the agitator experiment. Consisted of one driven...
Based on the reinforced concrete pole used in 110kV transmission lines, the paper proposed a new nondestructive testing (NDT) method. The method takes the drainage hole designed originally in the pole as the testing hole. Through the hole, an industry endoscope probe can be inserted to the pole to detect internal surface condition in underground section. To verify the NDT method, a testing pole with...
In view of the specific features of the current harmonic monitoring system, especially the difficulty in realizing complex algorithms, a new method which adopts S3C2410 and embedded Linux platform to construct a new harmonic monitoring system is designed in this paper. It also provides graphic user interface by using QT/Embedded library and harmonic compensation system based on the improved method...
Fire water monitor is one of the main equipment widely used in the fire fighting. A liquamatic fire water monitor with vavle-controlled cylinder device was designed. This fire water monitor head is controlled by a vavle-controlled cylinder device, which is driven by the water pressure and reciprocated by using mechanical feedback device. The hydraulic performance simulation of the liquamatic fire...
The information has been the soul of ITS, the types and characteristics of ITS information (only for geographic information) are deeply analyzed in this paper, ways of obtaining information and the processing and transmission methods of information are explored, information utilization ways and roles based on ITS are proposed.
The expressway facilities management system is becoming crucial for successful traffic management with the spreading of expressway construction in China. In this paper, the current expressway facilities management systems are analyzed. Due to lack of the spatiotemporal data management capability of these systems, a bi-temporal spatial data model is proposed, which combines the temporal relational...
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