摘要：In this article, a parallel hardware processor is presented to compute elliptic curve scalar multiplication in polynomial basis representation. The processor is applicable to the operations of scalar multiplication by using a modular arithmetic logic unit （MALU）. The MALU consists of two multiplications, one addition, and one squaring. The two multiplications and the addition or squaring can be computed in parallel. The whole computations of scalar multiplication over GF（2^163） can be performed in 3 064 cycles. The simulation results based on Xilinx Virtex2 XC2V6000 FPGAs show that the proposed design can compute random GF（2^163） elliptic curve scalar multiplication operations in 31.17 μs, and the resource occupies 3 994 registers and 15 527 LUTs, which indicates that the crypto-processor is suitable for high-performance application.

摘要：Hybrid precoding can reduce the number of required radio frequency(RF)chains in millimeter-Wave(mmWave) massive MIMO systems. However, existing hybrid precoding based on singular value decomposition(SVD) requires the complicated bit allocation to match the different signal-to-noise-ratios(SNRs) of different sub-channels. In this paper,we propose a geometric mean decomposition(GMD)-based hybrid precoding to avoid the complicated bit allocation. Specifically,we seek a pair of analog and digital precoders sufficiently close to the unconstrained fully digital GMD precoder. To achieve this, we fix the analog precoder to design the digital precoder, and vice versa. The analog precoder is designed based on the orthogonal matching pursuit(OMP) algorithm, while GMD is used to obtain the digital precoder. Simulations show that the proposed GMD-based hybrid precoding achieves better performance than the conventional SVD-based hybrid precoding with only a slight increase in complexity.

摘要：Based on the output-driven input-enabled hypothesis, we proposed an instructional design model for a preliminary research of the flipped classroom in teaching practical English writing. During the research, we made two questionnaires, which revealed that most students preferred and benefited from this new pedagogy. Based on the research, the author discusses the characteristics of the flipped-classroom pedagogy for teaching ESP as well as such basic ESP instructional principles as mulflmodality, interacfivity, practicability and leamer-centeredness. The flipped-classroom teaching mode is expected to supply valuable insights to College English teaching reforms in China.

摘要：The Bauhaus, one of the most prestigious colleges of fine arts, was founded in 1919 by the architect Walter Gropius. Although it is closed in the last century, its influence is still manifested in design industries now and will continue to spread its principles to designers and artists. Even, it has a profound influence upon subsequent developments in art, architecture, graphic design, interior design, fashion design and design education. Up until now, Bauhaus ideal has always been a controversial focus that plays a crucial role in the field of design. Not only emphasizing function but also reflecting the human-oriented idea could be the greatest progress on modern design and manufacturing. Even more, harmonizing the relationship between nature and human is the ultimate goal for all the designers to create their artworks. This essay will analyze Bauhaus’s influence on modern design and manufacturing in terms of technology, architecture and design education.