Hailin Jiang

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Power-gating is a technique for saving leakage power by shutting off the idle blocks. However, without good understanding and careful design, negative effects of power gating may overwhelm the potential gain and may make the technique not worth the effort. In this paper, we report on our study of the benefits and costs of the power-gating technique in terms(More)
The paper presents a novel three-stage algorithm for very-low-light video denoising and enhancement. The proposed technique invokes twice, in the first and the third stages, the well-known Non-Local Means (NLM) method for spatial and temporal denoising: it is well adapted to the application, leading to the definition of a novel NLM tool. The intermediate(More)
The 802.11b physical protocols applied in Communication Based Train Control (CBTC) Train-Ground communication system are simulated in this paper, and the simulation result is used to determine the AP distance. The train speed impact on physical FER is also studied by the simulation result. As a protocol used in a fully mobile outdoor environment, the packet(More)
Power gating is a technique for efficiently reducing leakage power by disconnecting idle blocks from the power grid. When gated blocks are woken up, large amounts of switching currents are drawn in a short period of time that may introduce severe noise on the power delivery mesh. In this paper, we propose a GA-based approach to schedule power gating(More)
Wireless LAN technologies are adopted in most train-wayside communication systems in CBTC. The handover interruption time between WLAN APs is one of the key parameters which affect the train-wayside communication performance. A location based handover scheme for WLAN in tunnels is proposed in this paper for the CBTC system. By the proposed location based(More)
In Communication Based Train Control system, leaky waveguide can be used to transmit information between train and wayside, which can alleviate the impact of interference or deliberate attack, and improve the reliability and safety of transmission. To use wireless to transmit information can reduce the difficulty and cost of construction significantly. This(More)
In this paper we present the Gain-based Logic Block Array (GLA), a new via-programmable regular fabric. GLA is an array of Gain-based Logic Blocks (GLBs). The GLB is a semi-universal logic block designed based on logical effort theory[12]. Customization of the GLBs is provided by programmable vias. To achieve the best performance, appropriate fabric has to(More)
We investigate the problem of clock network sizing subject to general skew constraints. A novel approach based on sequential linear programming is presented. The original nonlinear programming problem is transformed into a sequence of linear programs by taking the first-order Taylor's expansion of clock path delay with respect to buffer and/or wire widths.(More)