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Blind image deconvolution for single motion-blurred image

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The Journal of China Universities of Posts and Telecommunications 2010年第3期17卷 104-109页

作者： sun shao-jie wu qiong li guo-hui College of Information System and Management National University of Defense Technology Changsha 410073 China Airforce Training Equipment Institute Beijing 100195 China

Motion blur due to camera shake during exposure is one of the most common reasons of image degradation, which usually reduces the quality of photographs seriously. Based on the statistical properties of the natural image＇s gradient and the blur kernel, a blind deconvolution algorithm is proposed to restore the motion-blurred image caused by camera shake, adopting the variational Bayesian estimation theory. In addition, the ring effect is one problem that is not avoided in the process of image deconvolution, and usually makes the visual effect of the restored image badly. So a dering method is put forward based on the sub-region detection and fuzzy filter. Tested on the real blurred photographs, the experimental results show that the proposed algorithm of blind image deconvolution can remove the camera-shake motion blur from the degraded image effectively, and can eliminate the ring effect better, while preserve the edges and details of the image well.

关键词： blind image deconvolution motion blur camera shake ring effect

Comparative genomic analysis revealed that dietary habits affected the adaptation of Bifidobacterium bifidum to the intestinal tract in different geographic populations

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Food Science and Human Wellness 2024年第5期13卷 3006-3017页

作者： Min li jie Yu Weicheng li qiong wu Jiaqi sun Zhihong sun Key Laboratory of Dairy Biotechnology and Engineering Inner Mongolia Agricultural UniversityMinistry of EducationInner Mongolia Agricultural UniversityHohhot 010018China Key Laboratory of Dairy Products Processing Ministry of Agriculture and Rural AffairsInner Mongolia Agricultural UniversityHohhot 010018China Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering Inner Mongolia Agricultural UniversityHohhot 010018China Collaborative Innovative Center for Lactic Acid Bacteria and Fermented Dairy Products Ministry of EducationInner Mongolia Agricultural UniversityHohhot 010018China Center for Applied Mathematics Inner Mongolia Hohhot 010018China

Recent research on the genome of Bifidobacterium bifidum has mainly focused on the isolation sources(intestinal tract niche)recently,but reports on the isolation region are *** study analyzed the differences in the genome of *** isolated from different geographical populations by comparative genomic *** at the genome level indicated that the GC content of American isolates was significantly higher than that of Chinese and Russian *** phylogenetic tree,based on 919 core genes showed that *** might be related to the geographical characteristics of isolation ***,functional annotation analysis demonstrated that copy numbers of carbohydrate-active enzymes(CAZys)involved in the degradation of polysaccharide from plant and host sources in *** were high,and 18 CAZys showed significant differences across different geographical populations,indicating that *** had adapted to the human intestinal environment,especially in the groups with diets rich in *** habits were one of the main reasons for the differences of *** across different geographical ***,*** exhibited high diversity,evident in glycoside hydrolases,the CRISPR-Cas system,and *** study provides a genetic basis for further research and development of ***.

关键词： Bifidobacterium bifidum Comparative genomics Genetic diversity Adaptation Carbohydrate-active enzymes

Bioinspired zinc-mediated umpolung thiolation of alkyl electrophiles: reaction development, scope and mechanism

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Science China Chemistry 2024年第3期67卷 898-907页

作者： Yuenian Xu Yan Zhang Yong liu Wen-wu sun jie Huang hui He Yingjie wu Wen liu shao-Fei Ni Xu-qiong Xiao Xinxin shao College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationHangzhou Normal UniversityHangzhou 311121China School of Pharmaceutical Sciences South-Central Minzu UniversityWuhan 430074China Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guang-dong Province Shantou UniversityShantou 515063China

Zinc-promoted umpolung thiolation of alkyl electrophiles with masked sulfur transfer reagents in the absence of nickel or copper catalysis is described. This protocol proceeds via a SET process of Zn to electrophilic sulfur reagent followed by insertion of Zn into disulfide and nucleophilic thiolation, providing straightforward access to a wide range of alkyl sulfides with broad substrate scope. A neutral TMEDA-ligated four-coordinated zinc thiolate with tetrahedra geometry was synthesized, isolated and fully characterized by NMR, IR and X-ray analysis. More importantly, the chemical reactivity of this active intermediate has been investigated, enabling the construction of C-Se, C-Te, Sb-S and Bi-S bonds to prepare valuable sulfur-containing molecules and beyond.

关键词： umpolung thiolation C(sp^(3))-S bond formation masked sulfur reagents reductive coupling

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Zynq-7000 SoC-based portable uncooled infrared imaging system

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Journal of Beijing Institute of Technology 2016年第3期25卷 435-440页

作者： PAN shao-wu li Xiao-qiong HAN jie School of life Science Beijing Institute of Technology Beijing 100081 China

A novel portable infrared imaging system based on uncooled focal plane array and programmable system-on-chip（SoC）was *** latest Xilinx Zynq-7000 was used to integrate the main part of the system into a single *** arithmetic units and digital modules were implemented on the programmable logic（PL）of Zynq-7000 to decrease system size and ensure the real-time p nonuniformity correction,while programs running on the processing system（PS）of Zynq-7000 controlled the system work flow and provided human-machine interfaces using open-source software such as linux and ***,industry standard advanced extendable interface（AXI）buses were adopted to encapsulating standardized IP cores and build high speed data exchange bridges between units within *** results indicate that the image quality and real-time performance of the system can meet application *** it provided a more flexible and extendable solution for evaluating and deploying infrared image enhancement and nonuniformity correction algorithms.

关键词： infrared imaging system uncooled Zynq-7000

NOVA1 promotes SMN2 exon 7 splicing by binding the UCAC motif and increases SMN protein expression

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Neural Regeneration Research 2022年第11期17卷 2530-2536页

作者： li-li Du Jun-jie sun Zhi-Heng Chen Yi-Xiang shao liu-Cheng wu Institute of Comparative Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education Co-Innovation Center of NeuroregenerationNantong UniversityNantongJiangsu ProvinceChina Laboratory Animal Center Nanjing University of Chinese MedicineNanjingJiangsu ProvinceChina Institute of Neuroscience Soochow UniversitySuzhouJiangsu ProvinceChina

Spinal muscular atrophy(SMA)is a rare hereditary neuromuscular disease with a high lethality rate in *** in the homologous genes survival of motor neuron(SMN)1 and SMN2 have been reported to be SMA pathogenic *** studies showed that a highinclusion rate of SMN2 exon 7 increased SMN expression,which in turn reduced the severity of *** inclusion rate of SMN2 exon 7 was higher in neural tissues than in non-neural ***-oncological ventral antigen(NOVA)is a splicing factor that is specifically and highly expressed in *** plays a key role in nervous system development and in the induction of nervous system *** r,it remains unclear whether this splicing factor affects *** this study,we analyzed the inclusion of SMN2 exon 7 in different tissues in a mouse model of SMA(genotype smn^(-/-)SMN2^(2 tg/0))and litter mate controls(genotype smn^(+/-)SMN2^(2 tg/0)).We found that inclusion level of SMN2 exon 7 was high in the brain and spinal co rd tissue,and that NOVA1 was also highly expressed in nervous system *** addition,SMN2 exon 7 and NOVA1 were expressed synchronously in the central nervous *** further investigated the effects of NOVA1 on disease and found that the number of neurons in the anterior horn of spinal cord decreased in the mouse model of SMA during postnatal days 1-7,and that NOVA1 expression levels in motor neurons decreased simultaneously as spinal muscular atrophy *** also found that in vitro expression of NOVA1 increased the inclusion of SMN2 exon 7 and expression ofthe SMN2 protein in the U87 MG cell line,whereas the opposite was observed when NOVA1 was knocked ***,point mutation and RNA pull-down showed that the UCAC motif in SMN2 exon 7 plays a critical role in NOVA1 binding and promoting the inclusion of exon *** r,CA was more essential for the inclusion of exon 7 than the order of Y residues in the ***,these findings indicate that NOVA1 intera

关键词： exon 7 inclusion motor neuron neuro-oncological ventral antigen 1 SMN2 splicing spinal cord spinal muscular atrophy splicing factors UCAC motif

Effect of different processings on mechanical property and corrosion behavior in simulated body fluid of Mg-Zn-Y-Nd alloy for cardiovascular stent application

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Frontiers of Materials Science 2014年第3期8卷 256-263页

作者： Shi-jie ZHU Qian liU Ya-Feng QIAN Bin sun li-guo WANG Jing-Min wu shao-Kang GUAN School of Materials Science and Engineering Zhengzhou University 100 Kexue Road Zhengzhou 450001 China National Centre for Quality Supervision and Inspection of Magnesium and Magnesium Alloy Product No. 1 Xing He Street Hebi 458000 China

The biomagnesium alloys have been considered to be one of the most potential biodegradable metal materials due to its good mechanical compatibility, biological compatibility, biological security and biodegradable characteristics. However, the two major problems of high degradation rates in physiological environment and low mechanical properties prevent the development of biomagnesium alloys. In the present work, the samples of Mg-Zn-Y-Nd alloy were prepared by cyclic extrusion compression （CEC） and equal channel angular pressing （ECAP）. The microstructures, mechanical properties of alloy and its corrosion behavior in simulated body fluid （SBF） were evaluated. The results reveal that Mg-Zn-Y-Nd alloy consists of equiaxial fine grain structure with the homogeneous distribution of micrometer size and nano-sized second phase, which was caused by the dynamic recrystallization during the ECAP and CEC. The corrosion resistance of alloy was improved. The tensile and corrosion resistance were improved, especially the processed alloy exhibit uniform corrosion performances and decreased corrosion rate. This will provide theoretical ground for Mg-Zn-Y-Nd alloy as vascular stent application.

关键词： cyclic extrusion compression equal channel angular pressing extrusion magnesium alloy corrosion

基于变分贝叶斯估计的相机抖动模糊图像的盲复原算法

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电子与信息学报 2010年第11期32卷 2674-2679页

作者：孙韶杰吴琼李国辉国防科学技术大学信息系统与管理学院长沙410073 空军军训器材研究所北京100195

在曝光过程中由于相机抖动而导致的运动模糊,是一种常见的图像降质现象。该文提出了一种基于变分贝叶斯估计和自然图像梯度统计特性的盲复原算法,用于恢复相机抖动模糊图像,同时针对图像复原过程中出现的振铃效应,设计了一种基于分区域... 详细信息

在曝光过程中由于相机抖动而导致的运动模糊,是一种常见的图像降质现象。该文提出了一种基于变分贝叶斯估计和自然图像梯度统计特性的盲复原算法,用于恢复相机抖动模糊图像,同时针对图像复原过程中出现的振铃效应,设计了一种基于分区域检测和Fuzzy滤波器的去振铃效应方法。实验结果表明,该文提出的盲复原算法能够有效地去除图像中因相机抖动而产生的模糊,而且在保持图像边缘和细节的同时,可以较好地降低振铃效应对图像复原质量的影响。

关键词：图像盲复原变分贝叶斯振铃效应相机抖动

Forecast of the Heterosis of Imported Meat Sheep by Genetic Polymorphism of Microsatellite DNA

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Agricultural Sciences in China 2007年第5期6卷 634-640页

作者： ZHANG Ying-jie liU Yue-qin sun Hong-xin sun shao-hua li wu College of Animal Science and Technology Agricultural University of Hebei Baoding 071000 P.R.China Institute of Animal Husbandry and Veterinary of Hebei Province Baoding 071000 P.R.China

Forecast of the heterosis of Small Tail Han sheep crossed with imported meat sheep by genetic polymorphism of microsatellite DNA was done in different sheep breeds. The gene frequency, the polymorphism information contents, the number of effective alleles, the heterozygosity, and the genetic distances were studied in four imported meat sheep and Small Tail Han sheep using five microsatellite loci. The crossing effects on the Small Tail Han sheep with four imported meat sheep were tested. The results indicate that there are genetic polymorphisms at five microsatellite loci in five sheep breeds. Five microsatellite loci can be used for genetic diversity evaluation in sheep breeds. The genetic variability of Dorset is the highest, and that of the Small Tail Han sheep is the lowest in the five sheep breeds. The order of heterosis from large to small in four imported meat sheep by the analysis of genetic relationship is White-Suffolk, Black-Suffolk, Dorset, and Texel. This accords with the testing results of actual heterosis. It is feasible to forecast the heterosis of Small Tail Han sheep crossed with imported meat sheep by genetic polymorphism of microsatellite DNA, which will have an important value for sheep breeding in the future.

关键词： sheep microsatellite DNA genetic polymorphism heterosis

Evidence of cortical reorganization of language networks after stroke with subacute Broca's aphasia:a blood oxygenation level dependent-functional magnetic resonance imaging study

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Neural Regeneration Research 2017年第1期12卷 109-117页

作者： Wei-hong Qiu hui-xiang wu Qing-lu Yang Zhuang Kang Zhao-cong Chen Kui li guo-rong Qiu Chun-qing Xie Gui-fang Wan shao-qiong Chen Department of Rehabilitation Medicine the Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Radiology the Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Aphasia is an acquired language disorder that is a common consequence of *** pathogenesis of the disease is not fully understood,and as a result,current treatment options are not ***,we used blood oxygenation level-dependent functional magnetic resonance imaging to evaluate the activation of bilateral cortices in patients with Broca＇s aphasia 1 to 3 months after *** results showed that language expression was associated with multiple brain regions in which the right hemisphere participated in the generation of *** activation areas in the left hemisphere of aphasia patients were significantly smaller compared with those in healthy *** activation frequency,volumes,and intensity in the regions related to language,such as the left inferior frontal gyrus（Broca＇s area）,the left superior temporal gyrus,and the right inferior frontal gyrus（the mirror region of Broca＇s area）,were lower in patients compared with healthy *** contrast,activation in the right superior temporal gyrus,the bilateral superior parietal lobule,and the left inferior temporal gyrus was stronger in patients compared with healthy *** results suggest that the right inferior frontal gyrus plays a role in the recovery of language function in the subacute stage of stroke-related aphasia by increasing the engagement of related brain areas.

关键词： nerve regeneration functional magnetic resonance imaging cortical functional connectivity language regions neuroplasticity Perisylvian language regions brain activation right hemisphere picture-naming task neural regeneration