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.
Software defined networks (SDNs) reshape the ossified network architectures, by introducing centralized and programmable network control. Despite the huge benefits, SDNs also open doors to what we call rule modification attack, an attack largely overlooked by the community. In such an attack, the adversary can modify rules by exploiting implementation vulnerabilities of switch OSes and control channels...
With the aging society, increasing personal health devices (PHDs) have been produced with different data transmission methods and packets. IEEE 11073 was drafted to tackle this difference. Conjunction with a number of transport technologies, 11073 protocol-suite were selected by Continua alliance to promote the standardization of personal health devices. In this paper, a data acquisition system based...
For an urban road indicating device, Variable Message Signs (VMS) screen system is used to publish and display all kinds of traffic information, including the condition of current and nearby roads and the useful travel advice, which leads to the topic that the VMS screen visual effect is a crucial issue. Therefore, a model for the visual effect evaluation of VMS screen with the simulation method is...
To improve the traditional electromagnetic induction methods for grounding grid diagnosis, a virtual instrument is proposed to detect weak signals in the harsh and noisy substation electromagnetic environment. The induced electric signal in the coil of wire, containing multi-source and intense noises, is collected by the NI DAQ device. Then virtual phase intensive detectors and digital filters constitute...
The major element of Ca directly affects the quality of the cement, so how to obtain its concentration fastly and accurately becomes especially significant. In this study, all the objects we chose to analyze were the powder cement without any pre-treatment. Firstly, We got the spectrum data on the surface of the cement samples by using Laser-induced breakdown spectroscopy technique, then we built...
Contrastive analysis of the performance of 7 classical polarimetric detectors is presented for multi-look case after extending the identity likelihood ratio test (ILRT), the optimal span detector (OSD) and the single channel detector (SCD). The ideal detection performances of the optimal polarimetric detector (MOPD), the multi-look polarimetric matched filter (MPMF), the multi-look polarimetric whitening...
Computer-system logs often contain high volumes of interesting, useful information, and are an important data source for network security analysis. In this paper, we propose a distributed log stream processing system consisting of three main parts: log collection module, log transmission module and log statistics module. The system uses several open source technologies, not only supports multi-source...
In harsh channel conditions, the quality of the synthetic speech at low bit rate would be affected severely. In order to improve the robustness of the vocoder and make it more resilient to errors in random channel, unequal error protection (UEP) channel coding is usually adopted. However, when the errors cannot be corrected in some cases, UEP channel coding will not improve the quality of the synthetic...
Credit scoring plays an important role in financial institutions and debt based crowdfunding platforms as well as peer to peer lending platforms. In the last few years, adopting ensemble methods for credit scoring has become much more popular. However, the performance of ensemble methods is easily affected by the parameter settings and the number of base classifiers. Ensemble classification based...
In the past decade, online news consumption has been steadily growing. New articles are published every few minutes, and user preferences are also constantly changing. Traditional recommender systems update model at regular intervals, which cannot adjust recommendation list dynamically according to the changes of user preferences. In this paper, we propose a hybrid recommendation model which contains...
Collaborative Filtering (CF) is widely applied to personalized recommendation systems. Traditional collaborative filtering techniques make predictions through a user-item matrix of ratings which explicitly presents user preference. With the increasingly growing number of users and items, insufficient rating data still leads to the decreasing predictive accuracy with traditional collaborative filtering...
Gallium nitride (GaN) is a promising semiconductor material with high electron mobility, larger sheet carrier concentration, and wide energy bandgap. Open-gate AlGaN/GaN high electron mobility transistors (HEMTs) are shown to be an effective method for detection polar liquids. In this work, the pH sensing response of an open-gate HEMT is investigated. The device exhibits a good linear pH detection...
This paper explores the clustering based multi-label classification problem. We propose an overlapping clustering based multi-label classification method (OCBMLC). In the experiment we compare three multi-label classification algorithms that are based on clustering. In the experimental setting section, we use three clustering methods for datasets before multi-label classification. Two popular multi-label...
Intensive testing is often applied by professional software engineers to assure the quality of enterprise information technology (IT) systems. For example, Netflix’s Simian Army consists of services that generate various types of failures, detect abnormal conditions, and test the ability of cloud-based enterprise IT software to survive them. Although software engineering students should be taught...
Ships stability and safety are always threatened by the unavoidable sway in the complicated situation of the sea, e.g. strong wind and roaring waves. Ensuring the stability of the ship as a difficult task has received its popularities in the community in the past few decades. However, conventional control methods such as sliding mode control (SMC) and Proportional integral derivative (PID) fail to...
Wireless sensor nodes (WSN) in IoT applications (e.g., Bluetooth Low Energy, BLE) rely on heavily duty-cycling the wireless transceivers to reduce the overall system power consumption [1]. This requires swift start-up behavior of the transceiver. The crystal oscillator (XO) generates a stable reference clock for the PLL to synthesize a carrier and to derive clocks for all other parts of the transceiver...
Convolutional neural networks (CNNs) have been widely applied in many deep learning applications. In recent years, the FPGA implementation for CNNs has attracted much attention because of its high performance and energy efficiency. However, existing implementations have difficulty to fully leverage the computation power of the latest FPGAs. In this paper we implement CNN on an FPGA using a systolic...
Replica creation strategy is one of the important research directions of the distributed file system in the hybrid cloud environment. However, traditional replica creation strategy just simply calculated the file heat based on the number of accesses to the file within a period of time. Besides, creating too many copies will seriously affect the performance of the node without considering the node...
Increasing hospital re-admission rates due to Hospital Acquired Infections (HAIs) are a concern at many healthcare facilities. To prevent the spread of HAIs, caregivers should comply with hand hygiene guidelines, which require reliable and timely hand hygiene compliance monitoring systems. The current standard practice of monitoring compliance involves the direct observation of caregivers' hand cleaning...
We demonstrate the direct observation of optical particle manipulations along light trajectories with the axial plane optical microscopy (APOM). Optically trapped particles moving along both straight and curved trajectories are successfully monitored by the APOM.
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.