IEEE 802.11 medium access control (MAC) is proposed to support asynchronous and time bounded delivery of radio data packets in infrastructure ad hoc networks. The basis the WLAN MAC protocol a distributed coordination function (DCF), which carrier sense multiple with collision avoidance (CSMA/CA) binary slotted exponential back-off scheme. Since has its own characteristics that are different from other wireless protocols, performance reliable transport over needs further study. This paper...

Accurate electrical load forecasting is of great significance to help power companies in better scheduling and efficient management. Since high levels uncertainties exist the time series, it a challenging task make accurate short-term forecast (STLF). In recent years, deep learning approaches provide performance predict real world cases. The convolutional neural network (CNN) can extract local trend capture same pattern, long memory (LSTM) proposed learn relationship steps. this paper, new...

Time-series novelty detection, or anomaly refers to the automatic identification of novel abnormal events embedded in normal time-series points. Although it is a challenging topic data mining, has been acquiring increasing attention due its huge potential for immediate applications. In this paper, new algorithm detection based on one-class support vector machines (SVMs) proposed. The concepts phase and projected spaces are first introduced, which allows us convert into set vectors...

In traditional radio-based localization methods, the target object has to carry a transmitter (e.g., active RFID), receiver 802.11x detector), or transceiver sensor node). However, in some applications, such as safe guard systems, it is not possible meet this precondition. paper, we propose model of signal dynamics allow tracking transceiver-free objects. Based on radio strength indicator (RSSI), which readily available wireless communication, three algorithms are proposed eliminate noise...

Opportunistic routing has recently attracted much attention as it is considered a promising direction for improving the performance of wireless ad hoc and sensor networks. With opportunistic routing, intermediate nodes collaborate on packet forwarding in localized consistent manner. greatly increases transmission reliability network throughput by taking advantage broadcast nature medium. In this article we first illustrate basic idea behind then categorize current research work based...

WiFi networks have enjoyed an unprecedent penetration rate in recent years. However, due to the limited coverage, existing infrastructure only provides intermittent connectivity for mobile users. Once leaving current network clients must actively discover new access points (APs), which wastes precious energy of devices. Although several solutions been proposed address this issue, they either require significant modifications infrastructures or rely on context information that is not...

Recognizing the transportation modes of people's daily living is an important research issue in pervasive computing. Prior this field mainly uses Global Positioning System (GPS), for Mobile Communications (GSM) or their combination with accelerometer to recognize modes, such as walking, driving, etc. In paper, we will introduce mode recognition on mobile phones only using embedded accelerometer. order deal uncertainty position and orientation phone, acceleration synthesization based method...

Being a part of IEEE project 802, the 802.11 medium access control (MAC) is used to support asynchronous and time bounded delivery radio data packets. It proposed that distributed coordination function (DCF), which uses carrier sense multiple with collision avoidance (CSMA/CA) binary slotted exponential backoff, be basis WLAN MAC protocols. This paper proposes throughput enhancement mechanism for DCF by adjusting contention window (CW) resetting scheme. Moreover, an analytical model based on...

Assessment of student learning is an important task in a teaching and process. It has strong influence on students' approaches to their outcomes. Development tertiary education shifted its emphasis from teacher-centered student-centered learning. In environment, criterion-referenced assessment techniques are often used current research practice. However, it sometimes happens that the criteria corresponding weights solely determined by lecturers charge. This may reduce interest participation...

Sink mobility has attracted much research interest in recent years because it can improve network performance such as energy efficiency and throughput. An energy-unconscious moving strategy is potentially harmful to the balance of consumption among sensor nodes so aggravate hotspot problem networks. In this paper, we propose an autonomous for mobile sinks data-gathering applications. our solution, a sink approaches with high residual force them forward data other tries avoid passing by low...

In R&D project selection, experts (or external reviewers) always play a very important role because their opinions will have great influence on the outcome of selection. It is also undoubted that with high-expertise level make useful and professional judgments projects to be selected. So, how measure expertise select most appropriate for selection significant issue. This paper presents group decision support approach evaluate Where criteria attributes evaluating are summarized mainly based...

Opportunistic routing is a new paradigm that takes advantage of the broadcast characteristic wireless channel for data delivery in mesh network. Network coding has recently emerged as can significantly improve throughput performance WMN. In this article we explore combination opportunistic and network improving We first review existing coding-aware protocols, respectively, classify these protocols based on different criteria, discuss their merits drawbacks. then propose mechanism combines...