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We demonstrated carrier-envelope phase (CEP) stabilized pulse as short as 5.4fs by compressing the octave-spanning spectrum from solid-state plates. Continuous and discrete HHG were observed by using the laser pulse as driver with different CEP.
Multiuser MIMO (MU-MIMO) plays an important role in Wireless Local Area Networks (WLAN), due to its ability of enabling concurrent transmissions between multiple users and Access Points. However, a larger amount of erroneous packets often occur in the MU-MIMO streams, resulting in massive retransmissions and severe transmission lags. Based on our empirical observations, we found that the incorrect...
In cloud storage, remote data integrity checking is considered as a crucial technique about data owners who upload enormous data to cloud server provider. A majority of the existing remote data integrity checking protocols rely on the expensive public key infrastructure. In addition, the verification of certificates needs heavy computation and communication cost. Meanwhile, the existing some protocols...
Above 6 GHz or 10 GHz, the radio frequency (RF) electro-magnetic field (EMF) exposure of user equipment (UE) is evaluated in terms of free space power density. The RF EMF exposure compliance of the fifth-generation (5G) UE with an 8 × 1 beam-steering slot array is analyzed in this paper. The maximum exposure (ME) and corresponding maximum permissible radiated power (MPRP) are calculated for different...
Gram stained direct smears test is clinically useful in early identification of infections. Unfortunately, this practice is considered time consuming and labour intensive. Most existing effort in this area is to perform highmagnification analysis of images taken from manually selected areas. In this paper, we address the problem of the automatic selection of candidate areas (or patches) for subsequent...
Multiple-In-Multiple-Out (MIMO) o‚ffers great potential for increasing network capacity by exploiting spatial diversity with multiple antennas. Multiuser MIMO (MU-MIMO) further enables Access Points (APs) with multiple antennas to transmit multiple data streams concurrently to several clients. However, the uplink data transmission (from client to AP) of MU-MIMO is more vulnerable because its wide...
An important function of smart environments is the ubiquitous access of computing devices. In public areas such as hospitals, libraries, and airports, people may want to interact with nearby computing systems to get information, such as directions to a hospital room, locations of books, and flight departure/arrival information. Touch screen based displays and kiosks, which are commonly used today,...
Wafer fabrication tends to small batch, and single wafer processing is effective in cluster tools. With the decrease of processes, redundant processing modules are adopted to improve the utilization of cluster tools. The scheduling of mixed-processing of multi-variety wafers should be developed for dual-armed cluster tools. Based on resource oriented Petri net model, we analyze the process by the...
The primary challenge in the visualization of a large-scale unstructured volume data with mixed cell types is to dissolve a bottleneck caused by visibility sorting of unstructured cells. In this paper, we implement an interactive particle-based rendering method to solve this complex visualization problem. This technique uses opaque particles as the proxy geometry of the mixed unstructured cells so...
The maximum ratio combined total isotropic sensitivity (TIS) of high order MIMO system in a real phone prototype is presented in this paper. The value of combined TIS is estimated through antenna pattern combination and verified by experiments. The impact from the order of MIMO system, the propagation model and the user body effect are investigated.
The multiplexing efficiency of high order MIMO in mobile terminal at 15GHz for 5G communication is studied in this paper. The multiplexing efficiency of two MIMO topologies are compared is calculated with a narrow angular spread Gaussian distributed incoming wave model in order to illustrate the mm wave channel characterize.
In the millimeter-wave (mmW) frequency band, radio frequency electromagnetic field (RF EMF) exposure is evaluated in terms of free space power density rather than the localized specific absorption rate (SAR) used in current cellular communications. In this study, we investigated RF EMF exposure of user equipment (UE) mock-ups employing a patch array operating at 15 GHz. Different understandings of...
A 3 mJ, two-cycle (11.4 fs), 1 kHz, carrier-envelope phase (CEP)-stable laser at 1.7 μm is developed via a three-stage optical parametric chirped-pulse amplifier (OPCPA) in BiB3O6. This is an ideal driver for generating isolated attosecond pulses in the soft x-ray region.
Activity recognition plays an important role in human-computer interactions. Recently, Channel State Information (CSI), known as a fine-grained information capturing the properties of WiFi signal propagation, has been widely used for activity recognition in a device-free pattern. Since CSI is much sensitive to ambient changes, CSI can be used as fingerprints as human activities. However, existing...
Automatically recognising facial emotions has drawn increasing attention in computer vision. Facial landmark based methods are one of the most widely used approaches to perform this task. However, these approaches do not provide good performance. Thus, researchers usually tend to combine more information such as textural and audio information to increase the recognition rate. In this paper we propose...
This paper introduces a new kind of data hub that is used for evaluation experiments of electrical devices. The hubs not only bridge the real-time data flow between on-site experimental equipment to central servers, but also solve the problem of data normalization. The design of the hub also considers the security issues and data protection in power grid internal network. According to the result of...
The breakthrough and wide application of technologies such as distributed generation, clean energy, smart substation, energy storage, and electric vehicles have a profound impact on the future of power grid dispatch and control modes. This paper introduces the development and influence of the clean energy program in China, describes the current dispatch and control modes, and then analyzes four components...
Vaccine-Derived Polioviruses (VDPVs) may emerge during person-to-person transmission (circulating VDPV [cVDPV]) or during prolonged replication in individuals with primary immunodeficiency (iVDPV). To prevent the emergence of type 2 vaccine-derived polioviruses (VDPV2s) which represents >90% of the VDPV during the past two years, WHO implemented a worldwide synchronized switch from trivalent oral...
Aiming at the intra-satellite communications time delay problem of the control system in wireless small satellites, and considering that the satellite's angular velocity can't be measured in some cases, a time delay state feedback controller based on MRPs model is designed. In this controller, angular velocity information is not needed. And the asymptotic stability of the control system is proven...
In this paper, we extend the nearest convex hull classifier to Symmetric Positive Definite (SPD) manifolds. SPD manifold features have been shown to have excellent performance in various image/video classification tasks. Unfortunately, SPD manifolds naturally possess non-Euclidean geometry, so existing Euclidean machineries such as the nearest convex hull classifier cannot be used directly. To that...
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