The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
With the increase of energy demand and environmental awareness, It becomes an inexorable trend to develop and utilize renewable energy and to increase the proportion of clean energy in end use energy. The development of power grid in future should not only consider power demand but also accommodate large-scale renewable energy. This paper conducts a study on the development pattern of future power...
Nowadays, the research on maglev motor has mainly focused on the electromagnetic levitation mechanism and control strategy for the rotor. Due to the fact that the characteristics of the air gap flow-field can directly affect the static and dynamic performance of the motor, there exists a big error between the theoretical analysis and practical situation of the rotor movement. However, the bearing...
Systematic error resulted from the pre-travel of the touch trigger probe is non-ignorable consititutent of inspection errors for On-Machine Measurennet (OMM). Based on analyzing the working procedure of probe, the mechanics condition of triggering mechanism under working situation is performed. Utilizing the results, a probe pre-travel mathematical model is established, which can describe the pre-travel...
Based on the overall physical model test of LNG jetty, the influence of berth length on mooring force and ship movement under different action of circumstance loads are studied. The experimental results indicate that when the ship lateral forces are mainly, the mooring force of bow and stern and breast lines tends to be uniform, and the max value of line tension will decrease by reducing the berth...
Through the overall physical model, the pier and beam slab wharf structure and big platform wharf structure influence on ship mooring conditions are tested. The results show that different wharf structure has certain influence on ship movement, mooring force and impact force. Due to the middle void space of pier and beam slab can buffer the wharf apron water action on the ship, which is good for improving...
Fine blanking process on plane blank holder utilizes three tooling elements: a punch, a plane blank holder and an ejector to generate a highly compressive stress state and pure shearing forces to constraint the deformation of sheet metal within the narrow blanking clearance zone. Numerical simulation of fine blanking for steel 20 was performed using commercial FEM software DEFORM, and element deletion...
In this paper we propose a new level-set based image segmentation method. Our contributions lie in two aspects. Firstly, to solve initialization sensitivity of existing methods, we propose an adaptive external force. It can dynamically determine its direction according to the change of contrast between two sides of the curve during the evolving process, in contrast to balloon force in traditional...
In order to inhibit the ammonia water volatilization firstly during the disposal of the ammonia water leak accident, a novel kind of retardant of volatilization of ammonia water was prepared with long and short chain alcohols in this work. The results showed that the retardant exhibited a good resistance to the volatilization of ammonia water. Firstly, the retardant could spread as monolayers rapidly...
Parameter vibration of horizontal cable with axial excitation at end on deck has been investigated. The change laws of cable displacement response and tension have been discussed. Based on cables in practical engineering, partial differential equation of horizontal cable parameter vibration has been mathematically solved. Frequency sweep and parameters have been analyzed. The occurrence condition...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.