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In this paper, we propose a novel network model for RF-powered cognitive radio networks and ambient backscatter communications. In the network under consideration, each secondary transmitter is able to backscatter primary signals to the gateway for data transfer or to harvest energy from the primary signals and then use that energy to transmit data to the gateway. To maximize overall network throughput...
In this paper, we analyze the performance of wireless sensor networks using stochastic geometry. In practical networks, since sensor nodes in the networks are not independently placed, there exists a correlation among the locations of the nodes. In order to capture the effect of the correlation, we model the spatial distribution of nodes as α-Ginibre point processes (GPPs) which reflect the repulsion...
In this paper, we study an overlay RF-powered cognitive radio network with ambient backscatter communications. In the network, when the channel is occupied, the secondary transmitter (ST) can perform either energy harvesting or data transmission using ambient backscattering technique to a gateway. We consider the case that the gateway charges the ST a certain price if the ST transmits information...
Many ultra-low power Internet of things (IoT) systems may be powered by energy harvested from ambient sources (e.g., solar radiation, thermal gradients, and WiFi). However, these energy sources can vary significantly in terms of their strengths and on/off patterns. For volatile systems, the intermittent nature of the energy sources necessitates the use of backup/recovery schemes to guarantee computational...
Wireless powered sensor networks are composed of multiple sensor nodes with limited energy supply and storage. In this paper, we consider the wireless powered sensor networks, where an energy gateway can supply energy wirelessly to the sensor nodes. The sensor nodes use the energy to transmit their data. We then propose an opportunistic energy scheduling scheme. In this scheme, the energy gateway...
The current-voltage characteristics of dual source regions and U-shape-gate tunneling field-effect transistor (DUTFET) is investigated. The U-shape-gate offers the enlarged tunneling area and steeper subthreshold swing (SS). The remarkable good performance makes it very attractive in replacing a conventional tunneling field-effect transistor (TFET), particularly for low-power applications.
The Students' Contest on Handmade Ship Models is a science competition organized by the Naval Architecture scholars to promote public's understanding and learning about ship science and marine vehicle technology. This Contest has been funded by the Pop Science Project, Department of International Cooperation and Science Education, Ministry of Science and Technology since 2006. The key purpose of this...
In this paper, we propose an Internet Protocol Version 6 (IPv6) packet transmission scheme for Wireless Networks for Industrial Automation-Process Automation (WIA-PA) networks. According to the specific demands of WIA-PA networks, we establish the improved WIA-PA protocol stack architecture for IPv6 technology, and design the transmission format of IPv6 packets for WIA-PA networks. Furthermore, based...
This work demonstrates p-type hybrid poly-Si fin channel junctionless field-effect transistor (JL-FET) with trench structure by dry etching process. This JL-FET shows superior performance in a low drain-induced barrier lowering (<10mV/V) and high Ion/Ioff (>108) for Leff = 1μm, excellent gate control.
This work demonstrates ultra-thin body (UTB) trench structure Junctionless FinFET (trench JL-FinFET) with double stacked Si3N4 charge trapping layer (NN-CTL) Si-SiO2-Si3N4-Si3N4-SiO2-Si (SONNOS) nonvolatile memory (NVM). It shows excellent memory characteristics, high program/erase (P/E) performance, good endurance (>104 cycles) and an excellent 10 years data retention with 99% electron remaining...
Agate-all-around (GAA) with trench structure poly-Si channel junctionless Field-Effect Transistor (JL-FET) has been successfully demonstrated. This JL-FET shows excellent performance in a low drain-induced barrier lowering (DIBL), a steep Sub-threshold Swing (SS) ∼70 mV/decade and high ION/IOFF (>108) ratio.
Quad-play intends to combine internet access, television and telephone with wireless access. It is a major vision for network convergence in the next generation networks. To deliver the streaming contents to user equipments is a key issue due to the high bandwidth consumption and the geographical spread of end users. Peer to Peer technology is widely adopted for this kind of service. Peer to Peer...
With the rapid improvement of intelligent building, some large scale and complex buildings face with several problems. One side is that too many technologies are invented and most of them are incompatible. The other side is that more complex buildings possess a longer life cycle. So to large buildings in its whole life cycle, the longitudinal integration of BAS is an important and difficult issue...
LonWorks has become a dominated fieldbus in building automation applications, especially in the last decade. There are many devices in buildings with none-LonWorks interface which also need to be horizontally integrated into LonWorks network, just as the devices with LonWorks interface, and a gateway is competent for the task. But traditional gateways have some limitation and drawbacks, and they may...
Wireless control technology plays an important role in the field of enterprise's industrial control. A novel system of wireless industrial control network is proposed: Ethernet is adopted in administration network and field bus network in device layer, heterogeneous network structures and protocols in upper-and-lower layers are interconnected with protocol conversion gateway. The network's structure,...
The emerging field of spintronics is undergoing exciting developments with the advances recently seen in spintronic devices, such as magnetic tunnel junctions (MTJs). While they make excellent memory devices, recently they have also been used to accomplish logic functions. The properties of MTJs are greatly different from those of electronic devices like CMOS semiconductors. This makes it challenging...
Defining and resolving design conflicts are the most important aspect of product innovative design. TRIZ provides theories, methods and tools for resolving design conflicts, but is scarce in identifying conflicts. Function-effect-structure (FES) framework constructed for representing the connections of design object is an effective problems analysis way in product design. This paper presents a product...
This paper proposed a load balance k-hop clustering algorithm (LBKC) for ad hoc works. Each node uses criteria to decide whether join the contention of cluster-heads. After k rounds of Floodmax[1], the IDs of cluster members are converged to potential cluster-head nodes of the network. Based on these informations, overloaded cluster-heads balance their loads with selected under-loaded cluster-heads...
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