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Electromigration (EM) becomes one of the most challenging reliability issues for current and future ICs in 10nm technology and below. In this paper, we propose a new analsys method for the EM hydrostatic stress evolution for multi-branch interconnect trees, which is the foundation of the EM reliability assessment for large scale on-chip interconnect networks, such as power grid networks. The proposed...
The proposed dynamic voltage scaling (DVS) based burst mode links the DVS technique in a system on a chip (SoC) and the burst mode operation of the DC-DC converter for further efficiency improving. Conventional burst mode has only one entrance transition point (ETP) between the pulse width modulation (PWM) and the burst mode, so the voltage ripple is high at low DVS voltage while the efficiency is...
In order to study the influence of vertical grounding electrode on impulse grounding resistance of substation ground network, the grounding model was built in COMSOL, and the impulse grounding resistances of substation grounding grid in different distribution, length and quantity of vertical grounding electrode were simulated and calculated. The results show that the closer the vertical ground to...
With the cross regional interconnection of the power grid, it is more and more inconsistent with the actual development of the power grid to use a single sandpile to simulate the power grid. The multi-sandpile model is developed to simulate the evolution process of the whole power grid failure in the form of all the single sandpiles evolving synchronously. First of all, the modeling method of multi-sandpile...
According to the application of cellular automata theory in complex system, a new kind of cellular automata model of grid failure is proposed which starts from basic concept of cellular automata and defines the composition method of cell, cellular rules and neighbors and so on. By simulation of the model, it is able to get the evolution of grid failure and it comprehensively considers of structural...
Three types of radial power combiners/dividers in Ka or Ku-band are proposed using resistive septum to improve the isolation and port matching. The measured results illustrate that these radial power combiners have good performance at high isolation, low loss and compact size.
The paper presents an automatic traffic sign recognition system using the videos recorded from an on-board dashcam. It is based on image processing, bilateral Chinese transform, and vertex and bisector transform techniques. The images captured from the dashcam are processed with the histogram of oriented gradients to form feature vectors, followed by support vector machines to detect the traffic signs...
Integrity constraint (IC) based data repairing is typically an iterative process consisting of two parts: detecting and grouping errors that violate given ICs, and modifying values inside each group such that the modified database satisfies those ICs. However, most existing automatic solutions treat the process of detecting and grouping errors straightforwardly (e.g., violations of functional dependencies...
As Wi-Fi networks are becoming insecurely denser, frame loss and the consequent throughput degradation are much more profound, due to severe interference in dense networks. Pre- vious works propose to exploit multi-radio diversity to improve loss resilience. However, they are far from practical because of their incompatibility with the Wi-Fi standard, high deployment cost and large processing delay...
In SDN-based WLAN, controller needs to collect the state info of Mobile Nodes (MNs) like received signal strength indicator (RSSI) for handoff. In such scenarios, high sampling rate facilitates handoff, but it also easily leads to system overhead thus limits access scale of MN. Besides, dynamical adjustment of transmit power of access point (AP) leads to the distinctive signal coverage. Existing handoff...
Electromigration (EM) is considered to be one of the most important reliability issues for current and future ICs in 10nm technology and below. In this paper we focus on the EM stress evaluation for one-dimensional multi-segment interconnect wires in which all the segments have the same direction, which is a common routing structure for power grid networks. The proposed method, which is based on integral...
Multicore processors have been widely used in battery-operated portable systems, desktop, and server applications, where dynamic voltage scaling (DVS) and adaptive voltage scaling (AVS) techniques are commonly employed to lower power consumption and improve thermal performance of the cores. In Fig. 20.2.1, high-bandwidth digital low-dropout (DLDO) regulators are used to achieve fast, cost-effective,...
Due to the low power feature of Bluetooth, network based on Bluetooth has been considered as one of the promising positioning technology candidates by the research and industry communities. In order to reduce the positioning error being introduced by the Received Signal Strength Indication (RSSI) algorithm, an optimized RSSI ranging and positioning algorithm is proposed, which is fully based on the...
With the fast development of E-commerce, the magnitudes of users and commodities grow dramastically, resulting in the extremely sparse user rating data. Traditional products' similarity measurement methods perform poorly when facing sparse user rating data. Considering the extreme sparsity of the rating data, collaborative filtering algorithm based on item rating prediction is introduced. Meanwhile...
The purpose of our study was to evaluate the value of whole-lesion apparent diffusion coefficient (ADC) histogram parameters in distinguishing cervical cancers with different differentiation. A cohort of 18 patients (mean age, 53 years) with biopsy confirmed cervical cancers were involved in this prospective study. All of them underwent 3-T diffusion weighted imaging (DWI) with b values of 0 and 800...
In this paper, aiming at overcoming the shortcomings of traditional RSJ (Reduce Side Join) algorithm based on MapReduce framework model, an optimized algorithm is proposed to increase the efficiency of the RSJ by using DistributeCache. The idea of Bit-map algorithm is adopted in this algorithm. Specifically, it extracts and compresses the connection attributes of one of the tables to make a “background”...
In the era of big data, the requirement for information security and system reliability has become more and more strict. There are some disadvantages in the application of the existing universal data backup and synchronization scheme to the data storage of the key server (The security problems in data transmission and the synchronization problem in the case of the primary is not connected to the secondary)...
The activity model based on tri-axial acceleration and gyroscope is proposed in this paper, and the difference between activities of daily living of (ADLs) and falls is analyzed at first. Meanwhile, Kalman filter is proposed to reduce noise. kNN algorithm and slide window are introduced to develop a wearable system for fall detection and alert, which is composed of a wearable motion sensor and a smart...
Conventional digital low dropout (D-LDO) regulator usually suffers from the drawback of long settling time during transient response due to the usage of shift register architecture. In this paper, the proposed D-LDO regulator can observe the output voltage variations during load transient time to predict the load current for fast transient response. Near optimum turn-on power MOSFET in steady state...
With the pace of construction of electrical grid, more districts are likely to be influenced by galloping of overhead transmission lines in winter. The galloping of overhead transmission lines may cause mechanical damages to metal fittings, insulators and transmission line towers. So it's of great significance to monitor the state and movement of overhead transmission lines. In transmission line galloping...
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