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The D’Alembert type waves and the soliton molecules in a (2+1)-dimensional Kadomtsev-Petviashvili with its hierarchy equation

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Communications in Theoretical Physics 2021年第10期73卷 14-22页

作者： Hui-Ling Wu Sheng-Wan Fan Jin-Xi Fei zheng-Yi ma Institute of Nonlinear Analysis and Department of mathematics Lishui UniversityLishui 323000China Institute of Optoelectronic Technology and Department of Photoelectric Engineering Lishui UniversityLishui 323000China Department of mathematics Zhejiang Sci-Tech UniversityHangzhou 310018China

For a one(2+1)-dimensional combined Kadomtsev-Petviashvili with its hierarchy equation, the missing D’Alembert type solution is derived first through the traveling wave transformation which contains several special kink molecule structures. Further, after introducing the B?cklund transformation and an auxiliary variable, the N-soliton solution which contains some soliton molecules for this equation, is presented through its Hirota bilinear form. The concrete molecules including line solitons, breathers and a lump as well as several interactions of their hybrid are shown with the aid of special conditions and parameters. All these dynamical features are demonstrated through the different figures.

关键词： Kadomtsev-Petviashvili equation soliton molecule breather/lump soliton elastic interaction

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稳健的虹膜定位算法

电子科技大学学报 2010年第6期39卷 920-923页

作者：马争电子科技大学通信与信息工程学院成都610054

虹膜定位是虹膜识别的第一步,同时也是最为关键的一步,它将直接影响整个虹膜识别系统的效率和准确率。针对目前已有虹膜定位算法的局限性,该文提出了一种新的基于多分辨率理论的虹膜定位算法。该算法首先在某一分辨率下搜索虹膜内外缘... 详细信息

虹膜定位是虹膜识别的第一步,同时也是最为关键的一步,它将直接影响整个虹膜识别系统的效率和准确率。针对目前已有虹膜定位算法的局限性,该文提出了一种新的基于多分辨率理论的虹膜定位算法。该算法首先在某一分辨率下搜索虹膜内外缘的边界点,然后针对这些边界点进行椭圆曲线拟合。通过大量的实验表明,该算法快速、准确,并能够在一定程度上解决偏视虹膜图像的定位问题和眼睑、睫毛的遮挡问题。

关键词：曲线拟合多分辨率分析尺度函数小波分析

Self-Healable and Stretchable PAAc/XG/Bi_(2)Se_(0.3)Te_(2.7) Hybrid Hydrogel Thermoelectric materials

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Energy & Environmental materials 2024年第2期7卷 180-186页

作者： Jinmeng Li Tian Xu zheng ma Wang Li Yongxin Qian Yang Tao Yinchao Wei Qinghui Jiang Yubo Luo Junyou Yang State Key Laboratory of materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Thermoelectric power generators have attracted increasing interest in recent years owing to their great potential in wearable electronics power *** is noted that thermoelectric power generators are easy to damage in the dynamic service process,resulting in the formation of microcracks and performance ***,we prepare a new hybrid hydrogel thermoelectric material PAAc/XG/Bi_(2)Se_(0.3)Te_(2.7)by an in situ polymerization method,which shows a high stretchable and self-healable performance,as well as a good thermoelectric *** the sample with Bi_(2)Se_(0.3)Te_(2.7)content of 1.5 wt%(i.e.,PAAc/XG/Bi2Se0.3Te27(1.5 wt%)),which has a room temperature Seebeck coefficient of-0.45 mV K^(-1),and exhibits an open-circuit voltage of-17.91 mV and output power of 38.1 nW at a temperature difference of 40 *** being completely cut off,the hybrid thermoelectric hydrogel automatically recovers its electrical characteristics within a response time of 2.0 s,and the healed hydrogel remains more than 99%of its initial power *** stretchable and self-healable hybrid hydrogel thermoelectric materials show promising potential for application in dynamic service conditions,such as wearable electronics.

关键词： bismuth telluride self healing thermoelectric material

Development of an STS marker Linked to Powdery Mildew Resistance Genes PmLK906 and Pm4a by Gene Chip Hybridization

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Agricultural Sciences in China 2010年第3期9卷 331-336页

作者： NIU Ji-shan JIA Hai-yan YIN Jun WANG Bao-qin ma zheng-qiang SHEN Tian-min National Centre of Engineering and Technological Research for Wheat/Henan Agricultural University Zhengzhou 450002 P.R.China State Key Laboratory of Crop Genetics and Germplasm Enhancement/Nanjing Agricultural University Nanjing 210095 P.R.China Tian-Min Seed Limited Company Lankao 730070 P.R.China

Wheat （Triticum aestivum L.） line Lankao 90（6） carries a recessive powdery mildew resistance gene temporarily named PmLK906 on chromosome 2AL. Near PmLK906 there is another known powdery mildew resistance gene locus Pm4. To track the two powdery mildew resistance genes in wheat breeding program by marker assisted selection （maS）, a linked molecular marker was developed in this study. Wheat gene chip hybridization combined with bulked segregant analysis （BSA） was used to develop an sequence-tagged sites （STS） marker for PmLK906 and Pm4. A new 2 125 bp full-length cDNA clone （GenBank accession no. EU082094） similar to csAtPR5 ofAegilops tauschii was isolated from Lankao 90（6） 21-12, and temporarily named TaAetPR5. Specific products could be amplified from cultivars or lines possessing Pm4a, Pm4b and PmLK906 with primers p9-7pl and p9-7p2 derived from TaAetPR5. TaAetPR5 was linked to PmLK906 at a genetic distance of 7.62 cM, and cosegregated with Pm4a. The p9-7p1 and p9-7p2 could be used as an STS marker for these resistance genes in wheat breeding. Because this marker was cosegregated with Pm4a, it can be used in map-based cloning of the alleles at Pm4 locus also.

关键词： wheat powdery mildew TaAetPR5 sequence-tagged sites (STS) molecular marker

A New Resource-Saving,High Chromium and manganese Super Duplex Stainless Steels 29Cr-12Mn-2Ni-1Mo-xN

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Journal of Iron and Steel Research International 2011年第9期18卷 41-46页

作者： ma zheng-huan ZHAO Xiang-juan GE Chang-sheng DING Tie-suo LI Jun XIAO Xue-shan Institute of materials Shanghai University Shanghai 200072 China Jiangsu Josen Special Steel Products Co Ltd Xinghua 225721 Jiangsu China

A new family of resource saving, high chromium and manganese super duplex stainless steels （DSSs）, with a composition in mass percent, % of Cr 0.29, Mn 0.12, Ni 2.0, Mo i. 0, and N 0. 51-0. 68, has been developed by examining the effect of N on the microstructure, mechanical properties and corrosion properties. The results show that these alloys have a balanced ferrite-austenite relation. The austenite volume fraction decreases with the solution treatment temperature, but it increases with an increase in N content. The increases in nitrogen enhance the ultimate tensile strength （UTS） and reduce the ductility of the material slightly. The pitting corrosion potential increases first and then decreases with an increase in nitrogen content when the amount of N arrives to 0.68%. The yield stress and ultimate tensile strength of solution treated samples were more than 680 and 900 MPa, the elongation of experimental alloys are higher than 30%, respectively, what is more, the pitting potentials were beyond 1 100 mV.

关键词： duplex stainless steel microstructure mechanical property pitting potential

Two-Stream Architecture as a Defense against Adversarial Example

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Journal of Electronic Science and Technology 2022年第1期20卷 81-91页

作者： Hao Ge Xiao-Guang Tu Mei Xie zheng ma School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 610054 School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054

The performance of deep learning on many tasks has been ***,recent studies have shown that deep learning systems are vulnerable to small specifically crafted perturbations imperceptible to *** with such perturbations are called adversarial *** have been proven to be an indisputable threat to deep neural networks(DNNs)based applications,but DNNs have yet to be fully elucidated,consequently preventing the development of efficient defenses against adversarial *** study proposes a two-stream architecture to protect convolutional neural networks(CNNs)from attacks by adversarial *** model applies the idea of“two-stream”used in the security ***,it successfully defends different kinds of attack methods because of differences in“high-resolution”and“low-resolution”networks in feature *** study experimentally demonstrates that our two-stream architecture is difficult to be defeated with state-of-the-art *** two-stream architecture is also robust to adversarial examples built by currently known attacking algorithms.

关键词： Adversarial example deep learning neural network

Transcriptome-based analysis of key genes and pathways affecting the linoleic acid content in chickens

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Journal of Integrative Agriculture 2023年第12期22卷 3744-3754页

作者： ZHAO Wen-juan YUAN Xiao-ya XIANG Hai ma zheng CUI Huan-xian LI Hua ZHAO Gui-ping Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding Foshan UniversityFoshan 528000P.R.China Institute of Animal Science Chinese Academy of Agricultural SciencesBeijing 100193P.R.China

Linoleic acid is an essential polyunsaturated fatty acid that cannot be synthesized by humans or animals themselves and can only be obtained *** amount of linoleic acid present has an impact on the quality and flavour of meat and indirectly affects consumer ***,the molecular mechanisms influencing the deposition of linoleic acid in organisms are not *** the molecular mechanisms of linoleic acid deposition are not well understood,to investigate the main effector genes affecting the linoleic acid content,this study aimed to screen for hub genes in slow-type yellow-feathered chickens by transcriptome sequencing(RNA-Seq)and weighted gene coexpression network analysis(WGCNA).We screened for candidate genes associated with the linoleic acid content in slow-type yellow-feathered broilers.A total of 399 Tiannong partridge chickens were slaughtered at 126 days of age,fatty acid levels were measured in pectoral muscle,and pectoral muscle tissue was collected for transcriptome *** sequencing results were combined with phenotypes for WGCNA to screen for candidate *** enrichment analysis was also performed on the genes that were significantly enriched in the modules with the highest correlation.A total of 13310 genes were identified after quality control of transcriptomic data from 399 pectoral muscle *** was performed,and a total of 26 modules were obtained,eight of which were highly correlated with the linoleic acid *** key genes,namely,MDH2,ATP5B,RPL7A and PDGFRA,were screened according to the criteria|GS|>0.2 and|MM|>*** functional enrichment results showed that the genes within the target modules were mainly enriched in metabolic *** this study,a large-sample-size transcriptome analysis revealed that metabolic pathways play an important role in the regulation of the linoleic acid content in Tiannong partridge chickens,and MDH2,ATP5B,RPL7A and PDGFRA were screened as important candidate

关键词： chicken linoleic acid transcriptome sequencing weighted gene coexpression network analysis(WGCNA) metabolic pathways

Ovular development and perisperm formation in Phytolacca americana (Phytolaccaceae) and their systematic significance in Caryophyllales

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Journal of Systematics and Evolution 2010年第5期48卷 318-325页

作者： Hong-Chun zheng Sheng-Wen ma Tuan-Yao CHAI(College of Life Science,Graduate University of Chinese Academy of Sciences,Beijing 100049,China) (College of Life Science Graduate University of Chinese Academy of Sciences Beijing 100049 China)

Phytolacca is the biggest and most original genus in Phytolaccaceae and an important genus in plant systematic *** microscopy results show that the Phytolacca americana *** arises from the caulis(floral receptacle).The perisperm and hypostase are simultaneously initiated from the top several layers of cells of chalaza after fertilization,and the perisperm is located between the nucellus and *** the early stages of development,the hypostase cells are thin-walled with dense cytoplasm,clear nuclei,and some reserve ***,at the heart-shaped embryo stage,the hypostase cells are dead and *** main functions of the hypostase may be to maintain cellular division and perisperm growth without delivering nutrient materials to the *** evolutionary picture of placentation in Caryophyllales is also presented.

关键词： hypostase nucellus ovule perisperm Phytolacca placentation.

Effect of Spherical Ni Powder on Microstructure of Secondary Carbon in MgO-C Refractories matrix

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China's Refractories 2015年第2期24卷 42-45页

作者： WANG Xian ZHU Boquan LI Xiangcheng ma zheng WEI Ying The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Zhejiang Zili Co. Ltd. Shandong Shengquan Chemical Industry Co. Ltd.

In order to tackle the shortcomings of high brittleness,hard graphitization,and poor oxidation resistance resulted from carbonization of phenolic resin of Mg O- C refractories, effects of 2 mass% spherical Ni, and2 mass% spherical Ni plus 7. 5 mass% Al composite powder on microstructure of the secondary carbon in Mg O- C refractories matrix were investigated. The results show that a large number of carbon whiskers form after the carbonization of phenolic resin with Ni powder;in the Mg O- C refractories matrix with only Ni powder,the carbon microspheres form at all treatment temperatures and change slightly with the temperature rising;the carbon whiskers begin to generate in the specimens with composite powder at 1 000 ℃,the diameter of the carbon whiskers is about 0. 4- 0. 5 μm,and the length is about 3- 4 μm,and the formed carbon whiskers increase gradually with the temperature rising.

关键词： magnesia-carbon refractories spherical nickel powder aluminum powder secondary carbon carbon whiskers