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.
Energy storage technology is an important measure for power output of new energy generation system. T-type three-level structure is adopt as the topology of energy storage inverter. Mathematical model of grid-connected operation in ABC coordinate system and dq coordinate system is built. A double closed loop control strategy of which inner loop current and outer loop power control is proposed. The...
Conventional finite control set model predictive control (FCS-MPC) for multilevel converters can realize multi-objective control and contain the nonlinear characteristics. However, conventional FCS-MPC may lead to high computational complexity and unwanted switching transition, which is not easy to implement. To solve the issues of computational burden and unwanted switching transition, this paper...
Polishing is a precision machining method to improve the material surface quality. This paper presents a new polishing method based on Position-velocity-time (PVT) interpolation in computer-controlled optical surface (CCOS). In order to verify the machining performance of the proposed technology, a series of analytical and experimental investigations were conducted. From the experimental results,...
With the popularity of surveillance video, face detection in surveillance video has become a popular and important topic. Face detection in surveillance video plays an important role in many popular applications such as: personal identification, crowd analysis, database establishment, and abnormal event detection. This paper proposes an unconstrained face detection method for surveillance video, which...
In this paper, a novel method of Cu-Cu bonding by using the Cu nanosolder paste was proposed. The pure Cu nanoparticles used for preparing the Cu nanosolder paste were synthesized with simple routes and relatively high yields. The Cu nanoparticles were homogeneously dispersed with an average size around 60 nm. The sintering and bonding performance of Cu nanosolder paste were investigated, while an...
To overcome the high time consumption, unreasonable rotation and poor environment adaptability in obstacle avoidance of wheeled robots formation, a strategy combining heuristic path planning function and optimal formation transformation is proposed, and it is applied to AGV (Automatic Guided Vehicle). First of all, a base of common robots formation knowledge and the transformation time is built; Secondly,...
This paper comes up with a SDN based On-Demand Routing Protocol, SVAO, which separates data forwarding layer and network control layer, as in SDN, to enhance the data transmission efficiency within VANETs. The Roadside Service Unit plays the role of Local Controller and is in charge of selecting vehicles to forward packet within a road segment. All the vehicles state in the road. Correspondingly,...
The large parasitic resistance has become a critical limiting factor to on current (ION) of FinFET and nanowire devices. Fully metallic source and drain (MSD) process is one of the most promising solutions but it often suffers from intolerant junction leakage in bulk FETs. In this paper, fully MSD process on fin-on-insulator (FOI) FinFET is investigated extensively for the first time. By forming fully...
BoD and VTS applications were developed based on the hierarchical SDON architecture. OpenFlow was extended to support Ethernet performance monitoring, protection and restoration in OTN networks. The applications have been verified in field trial network.
With the development of industrial automation, the application of intelligent robots has been widespread increasingly, but it is difficult to accurately describe robotic workspace. Currently workspace analysis methods include analytic method, graphic and numerical methods, but these common methods have many shortages. This paper presents a method of robotic workspace solution, which combines the theory...
As continue shrinking of microelectronic device features, removal of nano-particle contaminations is becoming a major challenge in semiconductor manufacturing. After effective wafer cleaning, high particles removal efficiency must be achieved without substrate loss or damage to high aspect ratio structures. In this work, a novel dual-fluid spray nozzle was tested. The cleaning performance with control...
According to the needs of water meter remote monitor system for interoperability and security, based on WCF, a loose-coupling, service-oriented and distributed intelligent water meter remote monitor system was designed. With the system, the users can sell water, carry out data analysis and monitor the water meters and so on. This system can serve to the informatization in Water Supplies Department...
In this paper, a novel Cu-Cu bonding method with Ag doped Cu nanosolder paste is proposed. The Cu nanoparticles were synthesized with an efficient method, and the nanosolder paste was fabricated by mixing synthesized Cu nanoparticles, commercial used Ag nanoparticles and organic solution. The shear strengths of Cu-Cu bonding with Ag doped Cu nanosolder paste and pure Cu nanosolder paste at the bonding...
Forecasting water levels on Mekong river is an important problem needed to be studied for flood warning. In this paper, we investigate the application to forecasting of daily water levels at Thakhek station on Mekong river using machine learning models such as LASSO, Random Forests and Support Vector Regression (SVR). Experimental results showed that SVR was able to achieve feasible results, the mean...
Fronthaul using CPRI between BBU and RRU equipments is carried by bare fiber currently. As BBUs are more and more centralized as a pool, tremendous amount of connections may exhaust the dark fiber resource. Various optical solutions are proposed to carry CPRI. As CPRI brings stringent physical requirements, optical transmission and access technologies need to be optimized and modified. In this paper,...
The Guided Regularized Random Forests (GRRF) is an ensemble learning method based on random forests and has been shown to perform well in terms of both the gene selection and the prediction of accuracy for gene classification. However, the performance may be downgraded because the feature selection in the GRRF uses scores yielded by the original random forests. In this paper, we improve the GRRF's...
We demonstrate a control mechanism for multi-domain optical networks with commercial OTN equipments by using hierarchical SDN controllers. A solution based on extended OpenFlow was proposed to support Control Virtual Network Interface in OTN network.
We demonstrate 10×200 Gb/s real-time transmission over 5 types of fiber with flex-grid PDM-16QAM systems. Performance of different fiber is compared and more than 2000km transmission over ULL and EX2000 is achieved with EDFA only.
Static synchronous compensator (STATCOM) based on three-level neutral point clamped (NPC) converter is presented. A simple equivalent circuit of three-level converter is analyzed to predict the deviation of node voltages, and the capacitor voltage imbalance mechanism of three-level NPC converter is analyzed. An optimization algorithm of space vector pulse width modulation ( SVPWM ) for capacitor voltage...
The emergence of the field of smart grid data mining in the past years has an increase of interest in load profile analysis. The load profile clustering is used to discover the customer power consumption patterns from the AMI data. This paper examines how the wavelet-based clustering algorithm improves the capability to discriminate among the load profiles clusters in manufacture industry according...
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.