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In this paper, we proposed a convolutional neural network (CNN) features-based framework for road network extraction in high-resolution synthetic aperture radar (SAR) images. First, in consideration of rich structure information of road areas in high-resolution SAR images, a CNN model is proposed to extract road-area features and detect road candidates. The CNN model helps to improve the accuracy...
As a core concept in the development of Unmanned Aerial Vehicles (UAVs) co-operation, formation flight is attracting more and more attention recently. To realize formation flight of fixed-wing vehicles, a geometric formation flight control method based on real-time guidance point computation is proposed in the paper. The control method is within the leader-follower pattern. Through the feed forward...
We focus on QoE-optimized video delivery in a wireless heterogeneous network setting, where users equipped with multi-interface devices access a Dynamic Adaptive Streaming over HTTP (DASH) video service. We provide an Integer Linear Programming (ILP) formulation for the problem of optimal joint video quality and network interface selection and a heuristic algorithm to solve it, shown via simulation...
To accommodate small-cell deployment in future 5G wireless communications, a magnitude-selective affine function based digital predistortion model for RF power amplifiers is proposed. This model has a very simple model structure and is easy to implement. Experimental results showed, by employing this model, substantial hardware resource reduction can be achieved without sacrificing performance in...
Condition Based Maintenance(CBM) is a preventive maintenance strategy based on the actual running state of equipment. There are some deficiencies in the implementation of traditional CBM method. Firstly, how to acquire data used by CBM reasonably and improve the data coverage of equipment information is a problem to be solved. Secondly, the CBM method is still a maintenance strategy, when facing the...
User preference plays an important factor in E-commerce websites for advertising and marketing, and the disclosure of user preference could also raise privacy concerns. As one of the largest E-commerce platform, Amazon features a wishlist that allows users to keep track of their desired products. In this paper, we investigate Amazon wishlist, and its possible privacy exposure. To this end, we collect...
Web crawlers have been misused for several malicious purposes such as downloading server data without permission from the website administrator. In this paper, based on one observation that normal users and malicious crawlers have different short-term and long-term download behaviors, we develop a new anti-crawler mechanism called PathMarker to detect and constrain persistent distributed crawlers...
This paper presents an inchworm inspired soft robot composed of the soft body, the front foot as well as the back foot. Compared to the traditional inchworm-type robot consisting of rigid components, the driven mode for the soft robot is more simple. The soft robot inspired by the inchworm has higher locomotion efficiency than the other bionic soft robot. The main idea of this paper is to imitate...
Time series forecasting is usually done in a deterministic sense, such as in autoregressive moving average models, where a future state is predicted as a linear combination of past events. However, by formulating the problem in a probabilistic sense, soft predictions are obtained from a given probability mass function. This paper uses a deep neural network for probabilistic forecasting of time series...
We proposed and demonstrated a stable, label-free bacteriophage-based sensor of Escherichia coli using microfiber probe. T4 Bacteriophage was covalently immobilized on microfiber surface and E.coli concentration was investigated using the high accurate spectral interference mechanism. By immersing microfiber sensor into different concentration E.coli solution, the relationship between resonant wavelength...
Traditional libraries provide an Online Public Access Catalog (OPAC) as a portal for searches. Unfortunately, the call numbers patrons receive as a response lack the explicit information to guide the patron to the shelf in question. This can lead to a complicated and often time-consuming search, particularly in large multi-level structures. In this study, we developed a panorama-based navigation service...
Due to the massive growth in the number of wireless devices and their traffic, the problem of sharing channel access has become much severe in wireless networks. Group Synchronized Distributed Coordination Function (GS-DCF) was introduced in the IEEE 802.11ah standard to group users and give each group a Restricted Access Window (RAW) to compete in. However, how to group users remains an open issue...
This paper presents an air-cavity-fed four-element slot antenna array, which is fabricated using a modified silicon micromachining process. Different from traditional silicon micromachining process, the silicon dielectric is fully plated with gold without any silicon being exposed to the electromagnetic environment. In this modified silicon micromachining process, air cavities can be easily obtained...
Metasurfaces as multi-ordered optical metatronic filters can be engineered using electronic circuit design procedures. Numerical examples with different functionality (low-pass, high-pass, band-pass, and band-stop) illustrate the ability of this procedure to synthesize optical frequency dispersion.
A single longitudinal mode fiber laser using a cascaded microfiber knots filter is proposed and experimentally demonstrated. Output laser with the center wavelength of 1560.6 nm, 3dB bandwidth of less than 0.016nm is achieved.
Currently, fast advancement of digital electronic communication technology enables learning being underway in a virtual and multimodal form. This study, through qualitative analysis of the tendency of virtual learning community, the potential of pervasive computing technology as well as the modality research in classroom context, discussed the prospects of applying pervasive computing technology to...
Collaborative filtering is one of the most widely-used algorithms in recommendation systems. In user-based collaborative filtering algorithm, current users' nearest neighbors are used to recommend items because they have similar preference, but users' preference varies with time, which often affects the accuracy of the recommendation. As a result of the varying users' preference, many researches about...
The rapid development of the Internet of Things (IoT) has brought big challenges to the traditional cellular networks such as super dense devices and deep fading channels. These new challenges will lead to a significant transmission efficiency degradation and increase the device's power consumption, especially in the uplink. A huge pressure will be also imposed to the enhanced Node B's (eNB) scheduler...
Future Internet has been a hot topic for the last decade. One of the approaches put forward in order to revise the Internet architecture is LISP – Locator/ID Separation Protocol, which leverages the separation of the identifier and the locator roles of IP addresses. Contrary to the classical push model used by the BGP-based routing architecture, LISP relies on a pull model. In particular, routing...
The classical nonlinear guidance algorithm for a fixed-wing flying robot has the shortcoming of the unchangeable guidance length. To improve the algorithm, a novel guidance method is proposed based on the guidance point optimized online. The kinetic equations and the classical nonlinear guidance algorithm are introduced. The effects of the guidance length to the tracking performance are analyzed....
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