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A decision hyper plane heuristic based artificial immune network classification algorithm

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Journal of Central South University 2013年第7期20卷 1852-1860页

作者： deng ze-lin TAN Guan-zheng HE Pei YE Ji-xiang School of Information Science and Engineering Central South University Changsha 410083 China School of Computer and Communication Engineering Changsha University of Science and Technology Changsha 410076 China

Most of the developed immune based classifiers generate antibodies randomly, which has negative effect on the classification performance. In order to guide the antibody generation effectively, a decision hyper plane heuristic based artificial immune network classification algorithm （DHPA1NC） is proposed. DHPAINC taboos the inner regions of the class domain, thus, the antibody generation is limited near the class domain boundary. Then, the antibodies are evaluated by their recognition abilities, and the antibodies of low recognition abilities are removed to avoid over-fitting. Finally, the high quality antibodies tend to be stable in the immune network. The algorithm was applied to two simulated datasets classification, and the results show that the decision hyper planes determined by the antibodies fit the class domain boundaries well. Moreover, the algorithm was applied to UCI datasets classification and emotional speech recognition, and the results show that the algorithm has good performance, which means that DHPAINC is a promising classifier.

关键词： artificial immune network decision hyper plane recognition ability classification

Effect of dynamic loading orientation on fracture properties of surrounding rocks in twin tunnels

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 393-409页

作者： ze deng Zheming Zhu Lei Zhou Leijun Ma Jianwei Huang Yao Zhang Key Laboratory of Deep Earth and Engineering(Ministry of Education) College of Architecture and EnvironmentSichuan UniversityChengdu610065China Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province College of Architecture and EnvironmentSichuan UniversityChengdu610065China Institute for Disaster Management and Reconstruction Sichuan UniversityChengdu610065China

For expedited transportation,vehicular tunnels are often designed as two adjacent tunnels,which frequently experience dynamic stress waves from various orientations during blasting *** analyze the impact of dynamic loading orientation on the stability of the twin-tunnel,a split Hopkinson pressure bar(SHPB)apparatus was used to conduct a dynamic test on the twin-tunnel *** two tunnels were rotated around the specimen’s center to consider the effect of dynamic loading ***-DYNA software was used for numerical simulation to reveal the failure properties and stress wave propagation law of the twin-tunnel *** findings indicate that,for a twin-tunnel exposed to a dynamic load from different orientations,the crack initiation position appears most often at the tunnel corner,tunnel spandrel,and tunnel *** the impact direction is created by a certain angle(30°,45°,60°,120°,135°,and 150°),the fractures are produced in the middle of the line between the left tunnel corner and the right tunnel *** the impact loading angle(a)is 90°,the tunnel sustains minimal damage,and only tensile fractures form in the surrounding *** orientation of the impact load could change the stress distribution in the twin-tunnel,and major fractures are more likely to form in areas where the tensile stress is concentrated.

关键词： Twin-tunnel Dynamic load Split Hopkinson pressure bar(SHPB) Fracture mode Stress distribution Displacement field distribution

Comparative Analysis of Six Triticum turgidum L. Subspecies for Acid and Aluminum Tolerance

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Agricultural Sciences in China 2010年第5期9卷 642-650页

作者： DAI Shou-fen YAN ze-hong LIU deng-cai WEI Yu-ming ZHENG You-liang Triticeae Research Institute Sichuan Agricultural University Chengdu 611130 P.R.China

The aluminum （A1） tolerance of hexaploid wheat and rye has been extensively studied. However, the A1 tolerance of tetraploid wheat （Triticum turgidum L.）, the AABB genome donor of hexaploid wheat, has not been well characterized. To understand the A1 tolerance of tetraploid wheat and identify potentially new sources of tolerance to acidic soils, 254 Triticum turgidum wheat lines, including six subspecies of T. turdigum ssp. dieoccoides, ssp. dicoccon, ssp. carthlicum, ssp. turgidum, ssp. durum, and ssp. polinicum, were screened for acid and A1 tolerance by measuring the root regenerate lengths and the tolerance indices in acid nutrient culture solution containing A1. Significant differences were observed either among or within tetraploid wheat subspecies on the RRL （root regenerate lengths）. The orders for average RRL among subspecies in pH 7.00, pH 4.50 and pH 4.50 ＋ 50μmol L^-1 A1^3＋ were carthlicum ≥ turgidum ≥ durum ≥ dicoccoides polinicum ≥ dicoccon, carthlicum ≥ turgidum ≥ durum ≥ polinicum ≥ dicoccon ≥ dicoccoides and durum ≥ dicoccoides carthlicum ≥ turgidum ≥polinicum ≥ dicoccon, respectively. Significant difference was also observed on the root acid tolerance index （RT11） and root A1 tolerance index （RTI2） either among or within tetraploid wheat subspecies. Compared to RTI2, RTI1 varied in a wide range but with large value. The orders of the average RTI1 and RTI2 among subspecies were polinicum ≥ dicoccon ≥ carthlicum ≥ dicoccoides ≥ turgidum ≥durum, and dicoccoides ≥ durum ≥ turgidum ≥polinicum carthlicum ≥dicoccon, respectively. Significant difference on acid and A1 tolerance was existed either among or within subspecies. Some potentially tolerance germplasms different from those derived from hexaploid wheat, including 42 acid tolerance and 41 A1 tolerance lines, were identified in 254 tetraploid wheat lines. They provide new sources for hexaploid wheat acid and A1 tolerance improvement.

关键词： Triticum turgidum A1 tolerance acid tolerance

Preparation and properties of T-ZnO_(w) enhanced BCP scaffolds with double-layer structure by digital light processing

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Journal of Advanced Ceramics 2022年第4期11卷 570-581页

作者： Ming-Zhu PAN Shuai-Bin HUA Jia-Min WU Xi YUAN ze-Lin deng Jun XIAO Yu-Sheng SHI State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministry of EducationWuhan 430074China Department of Orthopedic Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Bone scaffolds require both good bioactivity and mechanical properties to keep shape and promote bone *** this work,T-ZnO_(w) enhanced biphasic calcium phosphate(BCP)scaffolds with triply periodic minimal surface(TPMS)-based double-layer porous structure were fabricated by digital light processing(DLP)with high *** of suspension was first discussed to obtain better printing *** sintering,T-ZnO_(w) reacts with b-tricalcium phosphate(β-TCP)to form Ca_(19)Zn_(2)(PO_(4))14,and inhibits the phase transition toα-*** the content of T-ZnO_(w) increasing from 0 to 2 wt%,the flexural strength increases from 40.9 to 68.5 MPa because the four-needle whiskers can disperse stress,and have the effect of pulling out as well as fracture ***,excessive whiskers will reduce the cure depth,and cause more printing defects,thus reducing the mechanical ***,T-ZnO_(w) accelerates the deposition of apatite,and the sample with 2 wt%T-ZnO_(w) shows the fastest mineralization *** good biocompatibility has been proved by cell proliferation *** confirmed that doping T-ZnO_(w) can improve the mechanical strength of BCP scaffolds,and keep good biological property,which provides a new strategy for better bone repair.

关键词： biphasic calcium phosphate(BCP) T-ZnO_(w) digital light processing(DLP) double-layer structure cure property mechanical strength

Antioxidant interactions between hydrophilic and lipophilic phytochemicals are influenced by their ratios and total concentrations

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Food Bioscience 2022年第1期45卷 156-165页

作者： Yao Pan Hongyan Li Xuan Chen Yawei Fan Bing Zhang Rong Liu ze-yuan deng State Key Laboratory of Food Science and Technology University of NanchangNanchang330047JiangxiChina School of Public Health University of NanchangNanchang330031JiangxiChina Institute for Advanced Study University of NanchangNanchang330031JiangxiChina

Lipophilic(lycopene,β-carotene)and hydrophilic(caffeic acid,p-coumaric acid)phytochemicals were mixed in molar mass at different concentrations/ratios to explore the antioxidant interactions on H_(2)O_(2)-treated H9c2 *** oxide species(ROS),expression of antioxidant enzymes,and oxidation products were analyzed and evaluated by synergistic rate(SR)and combination index(CI).At constant concentrations,antioxidant interactions were influenced by *** contained more hydrophilic compounds(eg.,p-coumaric acid:β-carotene=9:1)showed antioxidant synergism(SR=22.33±1.23,SR>0)at 3.0μM,while groups that contained more lipophilic compounds(eg.,p-coumaric acid:β-carotene=1:9)showed antioxidant antagonism(SR=-11.68±1.25,SR0)to antagonism(SR=-11.68±1.25,SR<0)as their total concentrations increased from 1.5μM to 3.0μ***,this study discussed the possible mechanism of ratio and concentration on the antioxidant interaction among hydrophilic and lipophilic *** also suggested that proper concentrations/ratios of hydrophilic and lipophilic phytochemicals should be considered in diet and formulation of functional foods.

关键词： Hydrophilic and lipophilic phytochemicals Antioxidant synergism Antioxidant antagonism Ratio/dose-effect

Evaluation on Chinese Bread Wheat Landraces for Low pH and Aluminum Tolerance Using Hydroponic Screening

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Agricultural Sciences in China 2009年第3期8卷 285-292页

作者： DAI Shou-fen YAN ze-hong LIU deng-cai ZHANG Lian-quan WEI Yu-ming ZHENG You-liang Triticeae Research Institute Sichuan Agricultural University Dujiangyan 611830 P.R.China

Aluminum （Al） toxicity often takes place in acidic soils with a pH of 5.5 or lower. Breeding and cultivation of Al tolerance wheat can partially protect wheat escaping from Al toxicity. The scarcity of the tolerant sources impedes the wheat breeding. In order to find new Al tolerance sources, we screened 173 bread wheat landraces from Tibet of China using hydroponic screening. It was indicated that：（1） There were diversities on the root regenerate length （RRL）. The RRL of a large of landraces were longer than 7.00 cm in pH 7 （58.38%） and pH 4.5 （66.47%）, but shorter than 5.00 cm in pH 4.5 ＋50μM Al^3＋（80.93%）. The low pH showed either promotion or restraining effects depend on landraces, but Al toxicity under low pH only showed restraining effects on the root elongation. （2） There were also diversities on root tolerance index of low pH （RTI 1） or root aluminum tolerance index （RTI2） among cultivars. The RTI1 varied from a narrow range but with relatively high value （0.8722-1.2953） in comparison with that of RTI2 （0.3829-1.0058）, and the RTI1 of approximately 60% landraces was higher than 1.0000, the RTI2 of only 19.07% landraces was higher than 0.7000, suggesting that Al toxicity acted as an important factor for the reduction of the root elongation under acidic soils. （3） The RTI 1 of many wheats was higher than 1.0000, and As2256 and As2295 were the most tolerant for low pH, with RTI1 1.2953 and 1.2925, respectively. （4） Based on RTI2, seven wheats showed similar or higher tolerance to Al toxicity than Chinese Spring （CS）, a known tolerance wheat. Much better tolerance existed in landraces of As1543 and As1242, which can be used as the new parents for Al tolerant breeding.

关键词： bread wheat root regenerate length tolerance index aluminum tolerance hydroponic screening

Three-dimensional conjugated macrocycle with large polyaromatic blocks constructed by post-π-extension

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Science China Chemistry 2020年第11期63卷 1626-1631页

作者： Shun-He Liu Hao Hou ze-Ying deng Xin-Rong Wang Chun Tang Yang-Yang Ju Liu-Bin Feng Yuan-Zhi Tan State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Generally,the conjugated homo-macrocycles(CHMs)are synthesized by covalently linking the repeating ***,large subunits are often difficult to conjugate together due to severe ***,large polyaromatic blocks can not only incorporate its appealing electronic and optical properties into CHMs but also distort the CHMs from planar to three-dimensional(3D)molecular *** we synthesized the 3D CHM composed of large polyaromatic units by post-π-***,cyclo-m-phenylenes,as the cyclic precursor,wereπ-extended by C-C coupling and then subjected to dehydrocyclization,affording cyclo-1,3-dibenzo[e,l]pyrenylenes(CMDP).The structures of CMDPs were unambiguously characterized by single crystal X-ray diffraction,showing a congested and strained 3D conformation,which was also confirmed by theoretical *** with the monomer,CMDPs showed redshifted absorption and emission,as well as a ten-fold enhancement in photoluminescence quantum yield,which could be attributed to their 3D conformation.

关键词： macrocycle 7r-extension polyaromatic photoluminescence

A bio-based epoxy resin derived from p-hydroxycinnamic acid with high mechanical properties and flame retardancy

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Chinese Chemical Letters 2022年第11期33卷 4912-4917页

作者： Xin Song ze-Peng deng Chun-Bo Li Fei Song Xiu-Li Wang Li Chen De-Ming Guo Yu-Zhong Wang The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)State Key Laboratory of Polymer Materials EngineeringCollege of ChemistrySichuan UniversityChengdu 610064China

Recent advances in epoxy resins have been forward to achieving high mechanical performance,thermal stability,and flame ***,seeking sustainable bio-based epoxy precursors and avoiding introduction of additional flame-retardant agents are still of increasing *** we report the synthesis of p-hydroxycinnamic acid-derived epoxy monomer(HCA-EP)via a simple one-step reaction,and the HCA-EP can be cured with 4,4′-diaminodiphenylmethane(DDM)to prepare epoxy *** with the typical petroleum-based epoxy resin,bisphenol A epoxy resin,the HCA-EP-DDM shows a relatively high glass transition temperature(192.9℃)and impressive mechanical properties(tensile strength of 98.3 MPa and flexural strength of 158.9 MPa).Furthermore,the HCA-EP-DDM passes the V-1 flammability rating in UL-94 test and presents the limiting oxygen index of 32.6%.Notably,its char yield is as high as 31.6%under N_(2),and the peak heat rate release is 60%lower than that of bisphenol A epoxy *** findings provide a simple way of using p-hydroxycinnamic acid instead of bisphenol A to construct high-performance bio-based thermosets.

关键词： Epoxy resin Bio-based p-Hydroxycinnamic acid Mechanical performance Intrinsic flame retardancy

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委托-代理关系的数学描述及应用分析

华南理工大学学报（自然科学版） 2010年第3期38卷 156-161页

作者：邓泽辉华南理工大学金融工程研究中心广东广州510640

委托-代理关系是不同变量之间的一种复杂函数关系.文中运用状态空间模型化(State-Space Formulation)方法对其基本模型和一般性的分析框架进行了描述,并借助Kuhn-Tucker理论对其解进行了分析.同时,以农村合作金融为例,阐述了委托-代理... 详细信息

委托-代理关系是不同变量之间的一种复杂函数关系.文中运用状态空间模型化(State-Space Formulation)方法对其基本模型和一般性的分析框架进行了描述,并借助Kuhn-Tucker理论对其解进行了分析.同时,以农村合作金融为例,阐述了委托-代理理论在实际中的应用.研究表明,政府与农村合作金融组织之间的风险分担机制的设定,要考虑农村合作金融组织负责人的道德风险问题与各种不确定性因素所造成的影响.通过运用委托-代理理论对这些不同个体之间的契约关系进行分析,可以为我们对这些问题的理解提供一个工具.

关键词：委托-代理模型拉格朗日方法 Kuhn-Tucker理论农村信用社