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An Improved Remote Sensing Image Fusion Algorithm Based on IHS Transformation
( Chao Deng ),( Zhi-heng Wang ),( Xing-wang Li ),( Hui-na Li ),( Charles C. Cavalcante ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.3
In remote sensing image processing, the traditional fusion algorithm is based on the Intensity-Hue-Saturation (IHS) transformation. This method does not take into account the texture or spectrum information, spatial resolution and statistical information of the photos adequately, which leads to spectrum distortion of the image. Although traditional solutions in such application combine manifold methods, the fusion procedure is rather complicated and not suitable for practical operation. In this paper, an improved IHS transformation fusion algorithm based on the local variance weighting scheme is proposed for remote sensing images. In our proposal, firstly, the local variance of the SPOT (which comes from French “Systeme Probatoire d`Observation dela Tarre” and means “earth observing system”) image is calculated by using different sliding windows. The optimal window size is then selected with the images being normalized with the optimal window local variance. Secondly, the power exponent is chosen as the mapping function, and the local variance is used to obtain the weight of the I component and match SPOT images. Then we obtain the I` component with the weight, the I component and the matched SPOT images. Finally, the final fusion image is obtained by the inverse Intensity-Hue-Saturation transformation of the I`, H and S components. The proposed algorithm has been tested and compared with some other image fusion methods well known in the literature. Simulation result indicates that the proposed algorithm could obtain a superior fused image based on quantitative fusion evaluation indices.
Performance Analysis of NOMA-based Relaying Networks with Transceiver Hardware Impairments
( Chao Deng ),( Xiaoya Zhao ),( Di Zhang ),( Xingwang Li ),( Jingjing Li ),( Charles C. Cavalcante ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.9
In this paper, the performance of non-orthogonal multiple access (NOMA) dual-hop (DH) amplify-and-forward (AF) relaying networks is investigated, where Nakagami-m fading channel is considered. In order to cover more details, in our analysis, the transceiver hardware impairments at source, relay and destination nodes are comprehensively considered. To characterize the effects of hardware impairments brought in NOMA DH AF relaying networks, the analytical closed-form expressions for the exact outage probability and approximate ergodic sum rate are derived. In addition, the asymptotic analysis of the outage probability and ergodic sum rate at high signal-to-noise ratio (SNR) regime are carried out in order to further reveal the insights of the parameters for hardware impairments on the network performance. Simulation results indicate the performance of asymptotic ergodic sum rate are limited by levels of distortion noise.
COMPUTING B-SPLINE SURFACES ON TRANSPUTER NETWORKS
Deng, Chao,Shen, Mong Tao 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
This paper presents a parallel implementation of computing uniform bicubic B-spline surfaces on Transputer networks. The parallel algorithm is described, timed and evaluated against its functional equivalent single processor code. The work is essential for building Transputer-based CAD and graphics systems.
Preparation and characterization of boron films used for boron-lined gaseous neutron detectors
Deng Chao,Wang Qibiao,Wu Yadong,Peng Shuming,Liu Fule,Li Huailiang,Cheng Jianfeng,Tuo Xianguo 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.7
Boron-lined gaseous neutron detectors are being widely used in neutron detection to replace 3He proportional counters, and the boron film’s parameters comprise the key factors influencing the performance of such detectors. However, the method of characterizing boron film is relatively simple at present. In this study, boron films stuck to ultrathin glass substrate with different mass proportions of epoxy to natural boron (MPENBs) were prepared. A variety of characterization methods, including scanning electron microscopy, energy-dispersive X-ray spectroscopy, white-light interferometry, and multiple tape tests, were used to test the boron films simultaneously, and the test results are discussed herein. Moreover, neutron imaging was conducted to analyze the uniformity of boron-10 atoms. These characterization results demonstrate that the optimized MPENB formulation is 0.16 with the boron atomic ratio of chemical elements (ARCE) at approximately 68.8% and surface roughness Sa = 1.457 μm and that the structure of boron film is uniform and fluffy, contributing to improving the boron-lined method.
( Chao Deng ),( Kaibin Huang ),( Yik-chung Wu ),( Minghua Xia ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.10
This paper studies the radio frequency to direct current (RF-DC) conversion efficiency of rectennas applicable to wireless power transfer systems, where multiple receive antennas are arranged in serial, parallel or cascaded form. To begin with, a 2.45 GHz dual-diode rectifier is designed and its equivalent linear model is applied to analyze its output voltage and current. Then, using Advanced Design System (ADS), it is shown that the rectifying efficiency is as large as 66.2% in case the input power is 15.4 dBm. On the other hand, to boost the DC output, three composite rectennas are designed by inter-connecting two dual-diode rectifiers in serial, parallel and cascade forms; and their output voltage and current are investigated using their respective equivalent linear models. Simulation and experimental results demonstrate that all composite rectennas have almost the same RF-DC conversion efficiency as the dual-diode rectifier, yet the output of voltage or current can be significantly increased; in particular, the cascade rectenna obtains the highest rectifying efficiency.
鄧超 ( Deng Chao ),孫永美 ( Youngmi Shon ) 사단법인 아시아문화학술원 2021 인문사회 21 Vol.12 No.1
西南少數民族服飾紋樣絢麗多姿,異彩紛呈,是中國獨具特⾊的服飾,它們匯集了中國傳統⽂化的精髓,蘊藏著豐富的內涵,表達了少數民族⼈民特定的審美觀念和⽣活情趣。本課題以西南少數民族服飾圖案為研究對象,在分析其發展的環境、特征及分類的基礎上,運⽤實踐案例闡述其在現代設計中的應⽤狀況。 由於現今對西南少數民族服飾紋樣的理論研究甚少,導致其與現代社會結合的趨勢呈現下降的狀態。因此, 對中國西南少數民族服飾紋樣的深⼊了解及如何將它應⽤在現代的設計中有著較為深遠的研究意義。 The costumes of Southwestern ethnic minorities are colorful. They are unique Chinese costumes. They bring together the essence of traditional Chinese culture, contain rich connotations, and express the specific aesthetic concepts and life interests of ethnic minorities. Based on the analysis of its development environment, characteristics and classification, this paper uses practical cases to elaborate its application in modern design. There are very few theoretical literatures and works on the costume patterns of the ethnic minorities in Southwest China. As a result, the ancient traditional costume culture is showing a state of decline. Therefore, an in-depth understanding of the patterns of ethnic minority costumes in Southwest China and how to apply it to modern design has far-reaching research significance.
Min Deng,Min Wang,Chao Tang,Bo Cai,Guangchang Ma,Xingwang Jiang,Guo-Hua Huang 국립중앙과학관 2024 Journal of Asia-Pacific Biodiversity Vol.17 No.1
A new species, Cephonodes sanshaensis Deng & Huang, sp. nov. is described from Xisha islands nearSansha City, China. Photographs of the adults and their genitalia are provided. The new species is similarto C. hylas (Linnaeus, 1771) and C. picus (Cramer, 1777) but can be easily distinguished by characters in themale genitalia: the right lobe of the uncus is hook-shaped with distinctly acute apex, the left valva is longand narrow with a truncate apex, and the right valva is broad and knife-shaped. Molecular analysis basedon cytochrome c oxidase I gene barcode sequences is used to infer the phylogenetic position of the newspecies within the genus Cephonodes. An updated key and checklist to the worldwide species of thegenus Cephonodes are also provided.
Chao, Zhe,Zheng, Xin-Li,Sun, Rui-Ping,Liu, Hai-Long,Huang, Li-Li,Cao, Zong-Xi,Deng, Chang-Yan,Wang, Feng Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.7
Epigenetic processes in the development of skeletal muscle have been appreciated for over a decade. DNA methylation is a major epigenetic modification important for regulating gene expression and suppressing spurious transcription. Up to now, the importance of epigenetic marks in the regulation of Pax7 and myogenic regulatory factors (MRFs) expression is far less explored. In the present study, semi-quantitative the real-time polymerase chain reaction (RT-PCR) analyses showed MyoD and Myf5 were expressed in activated and quiescent C2C12 cells. MyoG was expressed in a later stage of myogenesis. Pax7 was weakly expressed in differentiated C2C12 cells. To further understand the regulation of expression of these genes, the DNA methylation status of Pax7, MyoD, and Myf5 was determined by bisulfite sequencing PCR. During the C2C12 myoblasts fusion process, the changes of promoter and exon 1 methylation of Pax7, MyoD, and Myf5 genes were observed. In addition, an inverse relationship of low methylation and high expression was found. These results suggest that DNA methylation may be an important mechanism regulating Pax7 and MRFs transcription in cell myogenic differentiation.
( Chao Zhao ),( Yun Jin Deng ),( Xing Aa Wang ),( Qiu Zhe Li ),( Yi Fan Huang ),( Bin Liu ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.9
In order to obtain the cellulolytic bacterial consortia, sediments from Great Basin hot springs (Nevada, USA) were sampled and enriched with cellulosic biomass as the sole carbon source. The bacterial composition of the resulting anaerobic ethanol-producing celluloytic bacterial consortium, named SV79, was analyzed. With methods of the full-length 16S rRNA librarybased analysis and denaturing gradient gel electrophoresis, 21 bacteria belonging to eight genera were detected from this consortium. Clones with closest relation to the genera Acetivibrio, Clostridium, Cellulosilyticum, Ruminococcus, and Sporomusa were predominant. The cellulase activities and ethanol productions of consortium SV79 using different agricultural residues (sugarcane bagasse and spent mushroom substrate) and energy crops (Spartina anglica, Miscanthus floridulus, and Pennisetum sinese Roxb) were studied. During cultivation, consortium SV79 produced the maximum filter paper activity (FPase, 9.41 U/ml), carboxymethylcellulase activity (CMCase, 6.35 U/ml), and xylanase activity (4.28 U/ml) with sugarcane bagasse, spent mushroom substrate, and S. anglica, respectively. The ethanol production using M. floridulus as substrate was up to 2.63 mM ethanol/g using gas chromatography analysis. It has high potential to be a new candidate for producing ethanol with cellulosic biomass under anoxic conditions in natural environments.