Showing papers in "Tsinghua Science & Technology in 2011"

TL;DR: Comparative experiments show that even with a relatively simple feature descriptor, the proposed HOG feature achieves almost the same recognition rate with much lower computational time than the widely used Gabor feature on the FRGC and CAS-PEAL databases.

TL;DR: It is proved that mutual information is actually negative copula entropy, based on which a method for mutual information estimation is proposed.

TL;DR: This paper proposes a Low- Interference Energy-efficient Multipath Routing protocol (LIEMRO) to improve the QoS requirements of event-driven applications and employs a quality-based load balancing algorithm to regulate the amount of traffic injected into the paths.

TL;DR: A Particle Swarm Optimization (PSO) based algorithm is used to locate the optimal sink position with respect to those relay nodes to make the network more energy efficient.

TL;DR: A family of schemes are proposed for different situations that are lightweight in terms of computational overhead, resilient to storage compromise on mobile devices, and do not assume that trusted cloud servers are present.

TL;DR: This neural network fire alarm system can fuse a variety of sensor data and improve the ability of systems to adapt in the environment and accurately predict fires, which has great significance for life and property safety.

TL;DR: In this article, a robust model based on the α worst case scenario is developed to compensate for the drawbacks of traditional robust criteria, which allows the decision maker to balance robustness and conservativeness of assembly line task element assignments.

TL;DR: A fuzzy control algorithm for tunnel lighting energy control systems that uses LED lights and provides sufficient lighting levels for traffic safety with significant energy conservation is designed.

TL;DR: Theoretical analyses and simulations show that the scheme greatly improves the efficiency of the data aggregation operation by reducing both message and time costs compared to rebuilding the aggregation tree and rescheduling the entire network.

TL;DR: A general theory is given to generate the clock key, substitution box, permutation box and operational sign functions for a one-time-one-algorithm scheme, and this scheme is implemented in a system to manage the tradeoff between speed and the security of the encryption algorithm.

TL;DR: Simulation results validate the performance of the first introduction of a failure probability into the target coverage problem to improve and control the system reliability, and design a heuristic greedy algorithm that efficiently computes the maximal number of α-Reliable sensor covers.

TL;DR: This article shows how shifting attention between simultaneously presented tactile and visual stimuli affects the electrical brain activity of human subjects, and that this signal can be used to augment the control information from the two uni-modal BCI subsystems.

TL;DR: The concepts of navigability and reachability are used to evaluate three typical navigation approaches and show that these two indicators effectively identify the performance levels of navigation protocols in changing environments.

TL;DR: The architecture, design, and application of a sensorweb service portal called the LiveWeb, used to represent and monitor real-time physical sensor data and cyber activities from ubiquitous sources, is presented.

TL;DR: Simulations using BPSK modulation at the physical layer show that the wireless nodes can effectively detect fake neighbor connections without the adoption of special hardware or time synchronization.

TL;DR: In this article, a ball grid array (BGA) package based on Si interposer with through silicon via (TSV) was designed and compared to a conventional BGA with BT substrate.

TL;DR: Solid evidence is provided for the necessity of data-driven link estimation and the importance of addressing the drawbacks of beacon-based link estimation when designing protocols for low-power wireless networks of cyber-physical systems is demonstrated.

TL;DR: In this paper, a hierarchical framework based on the sparse representation is developed which flexibly combines different global and local features for generic image classification with some intra-class variations and background clutter.

TL;DR: While statistically optimal weighting according to the MLE rule was found in half of the participants, the other half consistently overweighted the auditory signal.

TL;DR: Comparisons between Beijing and Atlanta show that the conventional delay estimate methods and signal control algorithms may not fit Chinese scenarios, which makes imported intelligent traffic control systems not work well in China without calibrations.

TL;DR: An alternating iterative algorithm was developed to optimize the phase-modulated baseband waveform by maximizing the signal-to-noise ratio (SNR) at the receiver filter output and the algorithm is guaranteed to converge.

TL;DR: This paper presents a new combined AC/DC-coupled output averaging technique for input amplifier design of flash analog-to-digital converters (ADC) that takes full advantage of traditional DC-Coupled resistance averaging and AC-cOUpled capacitance averaging techniques to minimize offset-induced ADC nonlinearities.

TL;DR: This study focuses on the optimal load balancing overlay design problem for topic-based publish/subscribe systems in a heterogeneous environment and introduces the Maximum Minimum Idle Degree Overlay Design Algorithm (MMID-ODA), which has polynomial time.

TL;DR: An intelligent analysis method for optimization of co-channel and adjacent channel interference by exploiting cell configuration information is presented, which has better intelligence, accuracy, timeliness, and visualization than traditional methods.

TL;DR: In this paper, a mixed H2/H∞ controller using fuzzy singularly perturbed model (FSPM) with multiple perturbation parameters is presented. And the application of this approach to gust load alleviation of a flying vehicle verifies its effectiveness and flexibility.

TL;DR: A formal security analysis justifies that PASS can attain the security goals, while a performance analysis verifies that PASS requires few computations, and is scalable and flexible.

TL;DR: A reverse detection based QoS routing algorithm was developed based on the dynamic topology of low earth orbit (LEO) satellite constellation networks and has better performance than the static sequent snap shots algorithm with acceptable low overhead signaling.

TL;DR: The results demonstrate that the CBS protocol outperforms the current state-of-the-art approach, the Flooding Time Synchronization Protocol (FTSP), in both single-hop and multi-hop scenarios in terms of synchronous precision and energy consumption.

TL;DR: In this article, a simplified pulse coupled neural network (PCNN) is used to segment the original image into different planes and edges detected using both the PCNN firings map and a phase congruency detector.

TL;DR: This paper presents a meta-modelling system that automates the very labor-intensive and therefore time-heavy and therefore expensive and expensive process of computer programming called “supervised learning”.