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In this paper, we discuss using a game-theoretic approach for Network Slicing (in particular RAN Slicing) that enables fully dynamic allocation of spectrum. The algorithm allows radio resources from across the whole spectrum to be allocated to users from different slices, so avoiding the inefficiencies of fixed slices. By using game theory, we can apply constraints on the resources allocated to individual...
The non-equilibrium dynamics of superconducting order after the ultrafast gap quenching is analyzed. Evidence is shown for the formation of a photo-excited correlated spin-density wave state that can be controlled by adjusting pump laser's intensity.
Modular multilevel converter (MMC) is a promising topology of Voltage Source Converter based High voltage Direct Current (VSC-HVDC) system with many outstanding advantages such as low switching frequency, low voltage distortion and harmonics. Pre-charge process is one of the core issues of MMC based system, especially for the MMC with DC fault blocking capability. In this paper, considering a novel...
The high frequency high voltage (HFHV) transformer is one of the biggest contributors for conducted electromagnetic interference (EMI) emission of switching power supply. The transformer technologies for reducing conducted EMI emission focus on the shielding and changing the winding structures. However, for suppressing conducted EMI, the suppression capability of shielding is limited; current methods...
Gallium Nitride (GaN) transistors are emerging as promising candidates for making high-frequency, low-loss and small-size power converters. To realize normally-off, p-GaN gate technique is widely adopted in commercially available GaN-based power devices. However, owing to the distinctions in device structure, the intrinsic capacitances with regard to gate region vary from those of Si MOSFET. Besides,...
For suppressing of the conducted electromagnetic interference (EMI), passive EMI filter (PEF) is the most widely applied technique at present. The near-field coupling due to PEF passive components layout has great influence on filtering performance. Currently, the layout of PEF components completely dependents on the experience of EMC engineer. However, there is a lack in systematic design method...
Accurate and timely measurement of key performance variables is crucial for safe and economic operation of industrial processes. In the cold steel rolling process, strip thickness is the key performance indicator. However, due to time delay, it can be difficult to measure accurate and timely values. Therefore, a soft sensor can be used to provide timely and accurate values. This paper proposes a new...
A compact patch antenna array with high isolation by using two decoupling structures including a row of fractal uniplanar compact electromagnetic band-gap (UC-EBG) structure and three cross slots is proposed. Simulated results show that significant improvement in interelement isolation of 16dB is obtained by placing the proposed two decoupling structures. The design is easy to be manufactured without...
Among the high-radix and low-diameter networks, fat-tree topology is commonly used in HPC and datacenter systems. Resource and job management is critically important to mitigate application interference in order to achieve high system performance and utilization. Preliminary studies have shown the effect of job placement on parallel scientific applications performance. In this work we study interference...
Dragonfly network is widely used in modern high-performance computing systems. On this network, however, interference caused by network sharing can lead to significant network congestion and degraded performance. In this work, we present a comparative analysis of intra-application interference on applications with nearest neighbor communication, considering various placement strategies. Our results...
Key point correspondence plays a critical role in large distance lunar rover localization and navigation, which can decrease accumulative errors and facilitate the rover to approach probing target accurately. Lunar surface images often contain similar patterns, noisy points and obvious illumination changes, especially along with large distance movement, overlapping regions of image pairs have large...
According to the installation characteristics of gyroscope and accelerometer on the frame for airborne remote sensing stabilized platform, a dynamic angle measurement scheme is presented, in which the accelerometer is the main component, and gyroscope is the support. A correction method for handover frequency of complementary filter is raised according to statistical characteristics of the measurement...
The modular multilevel converter (MMC) is a competitive candidate for VSC-HVDC systems. However, the conventional HB-MMC can't block dc link fault current because of the freewheeling effect of diodes. To solve this problem, researchers proposed an account of sub-modules (SMs) with DC-fault current clearing capability. This paper summarizes the 2 basic criteria and provides a comprehensive review of...
In low-voltage ride-through or unbalance gird voltage condition, the fundamental fluctuation in the neutral-point (NP) voltage of three-level voltage source converter will appear under imbalanced grid voltage situation and has not been researched in detail. A new NP current model under imbalanced grid is developed to investigate the limitations of conventional nearest-vector modulation and to give...
Solid state transformer (SST) has recently attracted much attention due to its great potential of being applied in the future smart grid. Modular structure is commonly employed in SST, which makes it possible to enhance the reliability of the system by introducing redundancy fault-tolerant control (RFC). This paper presents a general design of 10kV/1MW SST with 800V DC bus, and the various RFC strategies...
High-voltage direct current transmission is a safe and efficient technology to deliver large amounts of electricity over a long distance. The number of the submodules in a voltage sourced converter high-voltage direct current (VSC-HVDC) station is usually up to hundreds. Therefore, for the manufacturer, it is necessary to establish a test platform to test the submodules quickly and conveniently. In...
A simple but efficient method is proposed in this paper to exploit the capability of autoencoder with Extended Morphological Profile (EMP) for hyperspectral image (HSI) classification. In our work, the extended morphological profile is employed to extract the spatial information, then we join it with the spectral feature to describe the spectral- spatial property of the hyperspectral image. The obtained...
In this paper, we use a Spectrum Sharing/allocation algorithm to implement a Cognitive Radio network without spectral awareness. This allows radio resources to be allocated to primary users and to secondary users in such a way that primary system and secondary system are aware of each other. By doing this, sensing of spectrum holes is avoided but the primary users will be protected and will always...
The main purpose of nature language processing is to process, understand, and apply all kinds of human beings' languages in written or oral forms. In recent years, “Bullet Screen”, which allows viewers to post bullet-like, real-time comments on screen during their watching films, is an emerging craze in online video sites, especially in China and Japan, mainly popular among young people for their...
With the widespread use of solar energy, the grid-connected photovoltaic (PV) systems based on solid state transformer (SST) have considerable prospect. This paper presents the design and demonstration of a three-phase 800-V/10-kV 1-MW SST for grid-connected PV system. The topology of the 10-kV/1-MW SST is designed as a modular structure containing the dual active bridge (DAB) converter and full bridge...
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