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.
A single few-layer graphene (FLG) sheet is synthesized on a tungsten tip by using microwave plasma enhanced chemical vapor deposition method. The sheet density of FLG on a tungsten tip is controlled by the substrate surface structure and local plasma density. This method provides a new way to fabricate a field emission point electron source.
Temperature dependence of the field emission from monolayer graphene was investigated in order to understand the field emission process from graphene. The results show that the field emission current under the same voltage increases dramatically with temperature rising from 300 K to 573 K. These results may be associated with a narrow energy gap of morphological disordered graphene, in which electrons...
Based on locally linear embedding (LLE) manifold learning theory, which assumes that the low-resolution (LR) manifold and high-resolution (HR) manifold spaces share the same local geometry structure, neighbor embedding based super-resolution(SR) methods search K-nearest neighbors(K-NN) of LR patch, then use the counterpart HR patches to estimate HR patch. The primary issue of these methods is how...
With the growing popularity of social media, consumers often rely on the recommendations obtained from online sources when making the purchase decision. Social commerce in this regard represents a shift in consumer's thinking from inefficient individual consumption to collaborative sharing and shopping. In this study, we investigate social commerce intention from two different but interrelated angles,...
Ocean buoys is an important tool of Marine Environmental Monitoring, The design of drifting buoy plays a significant role in field of shallow sea environmental monitoring. In order to solve the problem that the shallow marine physical parameters acquisition costs are high and the accuracy of data is low, this paper designed a mini-drifting buoy in shallow sea based on AT89S51 single-chip microcomputer,...
A 10 inch zinc oxide (ZnO) nanowire cold cathode was fabricated by screen printing zinc powder on ITO coated glass substrate and thermal oxidation in box furnace. The field emission characteristics and uniformity were investigated. The result shows that ZnO cathode is promising for lighting application.
Urban fast rail transit system represented by the special lines for passenger transportation and the intercity railway will be the one of modernized rail traffic in our country, which will exert great influence on the tourist preference of the urban residents. This thesis taking the residents in Shanghai and Nanjing in the Yangtze River Delta as instance, to study with the questionnaire, analyses...
The discussion entails redesign of the processes theaters use to provide services. Based on the original process theaters use, the new process combines mobile devices and customer relationship management (CRM) which affords every customer with personal service, and builds trust and loyalty.
This paper proposes an optimal path planning algorithm incorporating a global and local search mechanism for mobile robots. The global path planning is based on Voronoi graph to establish a backbone path for the map with significantly reduced nodes for the original grid map. With the use of the backbone path, the D* algorithm is adopted to determine a shortest path between the starting and end points...
Model-based residual directly affects the performance targets of fault detection system. An effective means of evaluating the residuals is the appropriate filter to restrain uncertain disturbances. This paper proposes a residual-based exponentially weighted moving robust fault detection strategy, and gives a EWMA (exponentially weighted moving average) robust early alarm process. Applied in water...
Cloud computing has been a study hot spot of computer network technology at home and abroad, since it was proposed in 2007. GIS raster data has amount of data, so when a large number of users access, traditional file mapping and network database, etc will have problems such as server overload, lower sharing efficiency. Cloud computing is undoubtedly the best ideas to solve storage and display of huge...
We report a highly simplified single-mesa organic/inorganic hybrid near-infrared-to-visible imaging upconversion device (spatial resolution ∼10 μm). This device integrates an intrinsic-InGaAs substrate and an organic light emitting diode.
The biggest problem to be solved in grid computing is data transmission and communication efficiency and stability. For computing grid composed of small local area network(LAN), this problem can be solved by properly building LAN with the use of IPv4 network or high-speed computing network such as Infiniband. However, when the computing resources are distributed in different physical regions, data...
The output of photovoltaic array has several corresponding local peaks of power-voltage curve with the existence of the shadow, In order to make the photovoltaic arrays continue to work in the maximum power point, need to create conditions for the model of the PV array, On the basis of the model, there are having some further detailed analysis and research about the characters of the local photovoltaic...
Several common used image mosaics algorithms are analyzed and compared and new algorithm based on feature points matching is presented, in which stitch points is determined through finding corresponding feature points of two images and its matching position is determined; Image mosaics are accomplished through fusing process in overlapping area and experiment is carried out in order to test the algorithm...
Many applications in Wireless Sensor Networks (WSNs) are, to a great extent, determined by networks security. But the security technology only based on encryption can not solve the new malicious behaviors because encryption technology can not effectively prevent attacks from internal opponents or error service from nodes. A pair-wise key update scheme in WSNs based on reputation model is proposed...
Intellectual capital is one of key resources of dynamic capabilities of salt industry in the knowledge economy era. Based on dynamic capabilities, the H-S-R model of intellectual capital management of salt industries has been proposed and an integrated and comprehensive management framework has been constructed in this paper, in order to do a systematic analysis on the approach of intellectual capital...
School organizational culture affected the school effectiveness, while the leadership styles were the key factor affecting the school organizational culture. Quantitative research with purposive sampling was adapted in this study to investigate the faculty of universities in Shanghai area to explore the influence factors of organizational culture, and building the model. The results showed that (1)...
Data acquisition and storage is an important step in the process in building GIS system. In the process of building a database, using the method of intelligent automatic vectorization is of great significance for reducing the workload of building a database and improving working efficiency. This paper presents a method of point pattern recognition based on interactive approach, that is to say, the...
With the development and application of network technology, the issues of network security has become prominent increasingly. Network security risk assessment has become the key process in solve network security. Support Vector Machine(SVM)is one of novel learning machine methods, its advantages are simple structure, strong compatibility, global optimization, least raining time and better generalization...
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.