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A novel method with M-sequence code in optical code-division multiple-access (OCDMA) network, called pseudo-random number mapping/coding (PRNMC) algorithm, includes chaos equation, HCC/EHCC algorithm, two mapping methods. An approximately symmetric scheme is used to transmit and receive the secret key in private channel from encoder to decoder. By combining those algorithms appropriately, the security...
Due to the sparsity that contained in underwater acoustic (UWA) channels, in recent years tremendous attention has been drawn in designing sparse channel estimation algorithms for improve the performance of channel equalizer, which is driven by channel estimator. However, experimental evaluation and comparison is limited regarding enhancing the performance of different norm constraint sparse channel...
For fast scattering analysis of multiple objects, the compressive sensing (CS) theory is introduced into method of moments (MOM). With the application of biorthogonal lifting wavelet transform(BLWT), an undetermined linear equation model is constructed by extracting the only several important rows of sparse impedance matrix in wavelet domain, then the unknown induced current is reconstructed by orthogonal...
To acquire reliable medical ultrasound images and accurately detect vascular diseases, it is inevitable to improve axial resolution and contrast facilitating clearly definition of depth and thickness of blood vessel walls.
In this paper, we propose the frequency domain minimum variance (MV) method plus coherence factor (CF) weighting technique to improve the axial resolution of medical ultrasound images. The minimum variance beamformer is originally proposed to apply over aperture domain data to improve lateral resolution. Via the help of spectral whitening, the MV method can be applied to the frequency components which...
There are many problems in the current massive open courses (MOOC) platform construction, such as high cost, high energy consumption, long construction period and poor reusability. In order to solve the above problems, a new platform construction schema of MOOC+Small Private Online Course (SPOC) based on Internet Data Center(IDC) is proposed. This platform can help users to quickly create their own...
It is a research hotspot that the evolutionary algorithm is applied to the nonlinear parameters identification of turbo-generator speed governor system, but the single evolutionary algorithms have varying degrees of defects: the premature convergence and slow convergence speed. A hybrid optimization algorithm (DEPSO) is proposed to overcome single evolutionary limitations based on the combination...
This paper attempts to represent the mapped data in the radial basis function (RBF) feature space under non-negativity constraints and develops a RBF kernel based non-negative matrix factorization (KNMF-RBF) algorithm. Based on an objective function with Frobenius norm, we obtain the multiplicative update rules of our KNMF-RBF approach using kernel theory and gradient descent method. The proposed...
This paper focuses on the inter-comparison of dual-frequency Precipitation radar(DPR) on board GPM core satellite and ground-based radar observations during the extreme precipitation estimation in southern China. Time and location matching technology is used to match DPR data and radar data. A Gauss function is applied compute sample weights to obtain a more accurate result. By distinguishing convective...
This paper introduces an algorithm of radar quantitative precipitation estimation (RQPE) derived from a S-band dual-polarization weather radar network over southern China. The observations obtained from Zhuhai radar was used to demonstrate the performance of the RQPE algorithm. This initial regional study on RPQE in southern China provides reference on RPQE algorithm over China in near future when...
Short-term high-resolution Quantitative Precipitation Nowcasting (SQPN), which refers to the forecasting of future precipitation within a very short time (I. e. 0–2h), is useful for flash-flood warning, navigation safety, and other hydrological and meteorological concerns.
This paper demonstrates a wideband complementary LC-VCO using capacitive-source-degeneration (CSD) technique for WiFi and LTE applications. A cross-coupling pair is required to generate suitable-gm but the parasitic capacitance of the pair leads to a reduction of capacitance ratio of varactors and thus, tuning range of a VCO. Properly designing source-degeneration capacitance can relieve this reduction...
This work presents an inductor-less 0.4 V cellular receiver (RX) front-end with an ultra-low power of 10 mW and an ultra-small area 0.31 mm2 in 16 nm FinFET technology, which enables massive receivers in a single chip for 10 Gb/s high throughput 5G system in sub-6 GHz band. The proposed inductor-less low-Vdd RX front-end consists of an LNA, passive mixers, LO generator and 20MHz bandwidth channel...
Based on the computer vision and neural network techniques, we propose a driver assistant system for automatic detection and recognition of Chinese traffic panels on highway. In detection stage, search regions are reduced by a simple ROI setting and traffic panels are efficiently identified by proper HSV color thresholding. In recognition stage, individual English characters are first located as maximally...
In academic libraries, electronic resources usually dominate the expenditure, but their usage is not systematically analyzed. Usage analysis usually requires manual integration of reports from various vendors in different formats via diverse channels. This makes it difficult to evaluate the cost effectiveness. In this poster, we implemented a systematic model to aggregate heterogeneous resources for...
Based on the scale-invariant feature transform, this paper presents an approach to keyboard recognition. Not only the skewed keyboard can be corrected, but also the keys in the keyboard can be located. Experimental results confirm the feasibility of the proposed method.
This paper develops a SIMD-based software fault tolerance technique for ARM processors. The core technique employs instruction-level redundant execution to tolerate bit-flipping errors. The proposed approach is implemented in the LLVM compiler to generate reliable code automatically. For the tested benchmark programs, preliminary experiments show that the proposed approach can correctly generate fault-tolerant...
Nowadays, the demand for data transmission is ever increasing with the increase of network applications. Therefore, how to enhance the performance of data transmission is an issue worthy of in-depth discussion. The throughput of single-path transmission schemes might be throttled by a congested link of its path. In contrast, multipath transmission schemes can utilize the bandwidth resource of several...
A well-organized meeting point should enhance the efficiency between travelers and people who are there to meet them. When picking up or seeing off passengers at an airport, the driver usually selects a meeting place according to the locations of airport entrances and exits, and mode of transportation. Whether the signs can be recognized easily, the colors of the signs, and how quickly they can get...
In this article making an attempt to interpret the words and lyrics of poem and song as the cultural element extraction source, through the deep understanding and unearth of the content, to establish a new approach on cultural creative design. In the case of Taiwan's well-known lyricist and writer, Mr. Vincent Fang (Fang Wen Shan) and mandopop (Mandarin popular music) singer Jay Chou's (Chou JieLun)...
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