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| 1 | Dietary resveratrol improves antioxidant status of sows and piglets and regulates antioxidant gene expression in placenta by Keap1-Nrf2 pathway and Sirt1显示文摘Background: Resveratrol, a plant phenol, affords protection against inflammation and oxidative stress. The objective of this study was to investigate the effects of dietary resveratrol supplementation during pregnancy and lactation on the antioxidant status of sows and piglets and on antioxidant gene expression and pathway in placenta.Methods: Forty sows were allotted to 2 dietary treatments 20 d after breeding. Sows were fed a control diet and a control diet with 300 mg/kg resveratrol. Oxidative stress biomarkers and antioxidant enzymes were measured in the placenta, milk, and plasma of sows and piglets. Antioxidant gene expression and protein expression of Kelch-like ECH-associated protein 1-Nuclear factor E2-related factor 2(Keap1-Nrf2), nuclear factor kappa B-p65(NFκB-p65) and sirtuin1(Sirt1) were quantified in the placenta.Results: Dietary resveratrol increased the litter and piglets weaning weights. Antioxidant status in the milk, placenta and plasma of sows and piglets was partially improved by dietary resveratrol. In placenta, Nrf2 protein expression was increased and Keap1 protein expression was decreased by dietary resveratrol. The m RNA expression of antioxidant genes including catalase(CAT), glutathione peroxidase 1(GPX1), GPX4, superoxide dismutase 1(SOD1)and heme oxygenase 1(HO1), and phase 2 detoxification genes, including glutamate-cysteine ligase modifier(GCLM), microsomal glutathione S-transferase 1(MGST1) and UDP glucuronosyltransferase family 1 member A1(UGT1 A1), was increased by dietary resveratrol. Dietary resveratrol also increased Sirt1 and phosphorylated NFκB-p65 protein expression in the placenta. We failed to observe any influences of dietary resveratrol on pro-inflammatory cytokine levels, including those of interleukin 1β(IL-1β), IL-6, IL-8 and tumor necrosis factor α(TNF-α). However, we observed that the m RNA expression of IL-8 in placenta was reduced by maternal resveratrol. In addition, dietary resveratrol showed interactive effects with day of lactation on activities of SOD and CAT and levels of malonaldehyde(MDA) and hydrogen peroxide(H2 O2) in milk.Conclusions: Dietary resveratrol supplementation during pregnancy and lactation improves the antioxidant status of sows and piglets, which is beneficial to the reproductive performance of sows. Dietary resveratrol regulates placental antioxidant gene expression by the Keap1-Nrf2 pathway and Sirt1 in placenta. | Qingwei Meng Tao Guo Gaoqiang Li Shishuai Sun Shiqi He Baojing Cheng Baoming Shi Anshan Shan | 2018 | Journal of Animal Science and Biotechnology2018，9，3： | 33 |
| 2 | Study on Steel-Mushy Al-20Sn Alloy Bonding显示文摘Steel-mushy Al-20Sn alloy bonding was studied for the first time. The relationship model about preheat temperature of steel plate, solid fraction of Al-20Sn alloy mushy, rolling speed and interfacial shear strength of bonding plate could be established by artificial neural networks perfectly. This model could be optimized with a genetic algorithm. The optimum bonding parameters were: 505’C for preheat temperature of steel plate, 34.3% for solid fraction of Al20Sn alloy musry and 10 mm/s for rolling speed, and the largest interfacial shear strength of bonding plate was 71.2 MPa. | Peng ZHANG, Yunhui DU and Daben ZENG Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China Jianzhong CUI Metal Forming Department, NEU, Shenyang 110006, China Limin BA Anshan Automobile Fittings Factory, Anshan 114014, China | 2001 | Journal of Materials Science & Technology2001，17，2： | 7 |
| 3 | STUDY ON HARVESTED POPULATION WITH DIFFUSIONAL MIGRATION显示文摘This paper is devoted to the study of the dynamical behavior and harvesting problem of an exploited population with diffusional migration, for which a protective patch is established. We examine the effects of protective patch and harvest on the population resources and conclude that the protective patch is effective for the conservation of population resources and ecological environment, though in some cases the extinction can not be eliminated. The dangerous region, the parameters domains and the typical bifurcation curves of stability of steady states for the considered system are determined. The optimal harvest policy for the considered population is made also. The explicit expressions are obtained for the optimal harvesting effort, the maximum sustainable yield and the corre- sponding population density. Our results provide a theoretical evidence for the practical management of biological resources. | FAN Meng WANG Ke (Deportment of Mathematics, Northeast Normal University, Changchun 130024, China) ZHANG Yujuan ZHANG Shuwen LIU Huimin (Department of Mathematics, Anshan Teacher’s College, Anshan 114005, China) | 2001 | Journal of Systems Science & Complexity2001，14，2： | 7 |
| 4 | Effects of Catalyst and Additive Containing Li, Na, or Ca on Reduction of Iron Oxide/Carbon Composite Pellets显示文摘The catalyst containing 0.69% (mass fraction) of Li, Na+, or Ca2+ were synthesized, and the catalytic effect on the reduction of iron oxide/carbon composite pellets were investigated by comparing with that of additive at 850 ℃. The effect of the catalyst was greater than that of the additive, it can be considered that catalyst promoted the formation of iron nucleus early on reduction processes of iron oxide/carbon composite pellets. In addition, both effects of catalyst and additive increased after added carbon powder into the pellets, but the extent of increase decreased when the carbon powder exceeded a suitable content (about 4%), this amount is less than that of car-bon needed theoretically on the reduction from hematite to iron. | Xingmin Guo, Shengbi Zhang, Nianxin Fu, Xiaofeng Zhao Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China Northeastern University, Shenyang 110006, China Anshan Iron and Steel (Group) Company, Anshan 114021, China | 2001 | Journal of University of Science and Technology Beijing2001，8，3： | 6 |
| 5 | Transcriptome analysis of the effect of pyrroloquinoline quinone disodium(PQQ·Na2) on reproductive performance in sows during gestation and lactation显示文摘Background: Pyrroloquinoline quinone(PQQ), which is a water soluble, thermo-stable triglyceride-quinone, is widely distributed in nature and characterized as a mammalian vitamin-like redox cofactor. The objective of this study was to investigate the effects of pyrroloquinoline quinone disodium(PQQ·Na2) on reproductive performance in sows.Results: Dietary supplementation with PQQ·Na2 significantly increased the total number of piglets born, the number of piglets born alive and the born alive litter weight. It also increased the antioxidant status in the placenta, plasma and milk. The concentration of NO was significantly increased in the plasma and placenta. RNA-seq analysis showed that462 unigenes were differentially expressed between the control(Con) treatment and PQQ treatment groups.Among these unigenes, 199 were upregulated, while 263 unigenes were downregulated. The assigned functions of the unigenes covered a broad range of GO categories. Reproduction(27, 7.03%) and the reproduction process(27, 7.03%) were assigned to the biological process category. By matching DEGs to the KEGG database, we identified 29 pathways.Conclusions: In conclusion, dietary supplementation with PQQ·Na2 in gestating and lactating sows had positive effects on their reproductive performance. | Boru Zhang Chenxi Wang Wei Yang Hongyun Zhang Qingwei Meng Baoming Shi Anshan Shan | 2019 | Journal of Animal Science and Biotechnology2019，10，4： | 5 |
| 6 | Reviews and Prospects of Clean Steel Production Practices in Ansteel显示文摘It summarizes the recognition of clean steel through the reviews the historical development and production practices of clean steel of Ansteel in this paper.The technological characteristic,equipment,controlling capability and new exploratory of clean steel production of Ansteel are introduced.It has also made a new appraisal to the production line of different clean steel from the angle of high efficiency,stabilization and low-cost.The prospects of new production technology of clean steel are introduced at the end of the paper. | TANG Fu-ping,LI De-gang,LIAO Xiang-wei,WANG Xiao-feng,WAN Xue-feng,JIA Ji-xiang,ZHANG Ji-gang(Anshan Iron and steel group company,Anshan 114000,Liaoning,China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 4 |
| 7 | Advances of Metal-Organic Frameworks in Energy and Environmental Applications显示文摘现在,精力缺乏和环境污染问题逐渐地严重、迫切被解决。从环境的有害气体的环境地友好的燃料和移动的有效存储和使用是大挑战并且为环境保护并且为人的健康很重要。多孔的金属器官的框架(MOF ) 是形成由的高度订的水晶的材料自己组装金属离子和器官的 ligands 的过程。他们的好特征例如超离频孔,大表面区域,结构的差异和功能在精力和环境域为应用使他们成为有希望的候选人。MOF 薄电影和 MOF composites 也被调查了进一步提高性质并且介绍新功能。这评论在象精力存储那样的精力和环境应用提供 MOF 的太古的 MOF, MOF 薄电影和 MOF composites,和重要进展的合成方法的概述(H 2, CH 4), 公司 2 俘获和分离,吸附移动并且在环境有害气体察觉到。 | Ying Li Bing Zou Anshan Xiao Hongxing Zhang | 2017 | Chinese Journal of Chemistry2017，35，10： | 4 |
| 8 | Chemistry Design of B-Containing Ultra-Heavy Plate Steels Aided by Thermo-Calc Calculation显示文摘Effect of N-bonding elements on dissolution and precipitation of B in micro B-treated ultra-heavy plate steels has been investigated,utilizing Thermo-Calc thermo-dynamic software and experimental test.The calculation results show that Titanium or excessive Aluminum content is effective to bond Nitrogen,preventing BN from forming and thus keeping boron in solid solution in austenite,while Vanadium is not.The experiment has also revealed that slight amount of solution Boron by addition of Ti or a little excessive Aluminum is helpful to improve hardenability of the steels. | PAN Tao 1,WANG Xiao-yong 1,WANG Hua 2,LI Yun 2,SU Hang 1,YANG Cai-fu 1 (1.Division of structural materials,Central Iron and Steel Research Institute,Beijing 100081,China 2.Anshan Iron and Steel Co Ltd,Anshan 114001,Liaoning,China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 3 |
| 9 | Effects of Sampling Conditions on Composition and Emission Characteristics of Volatile Organic Compounds in Process Units from Different Refineries显示文摘This study investigates the effects of sampling conditions on volatile organic compound(VOC)compositions including different flow restrictors,SUMMA volumes,sampling heights,and wind speeds.Results show that at the six sampling heights the concentrations of main VOC species were slightly different,while the wind speed had a greater impact on the VOC composition of source profiles.With the increase of wind speed,the weighted percentage of high-carbon aromatic hydrocarbons was higher.Besides,there was an extremely different profile between the normal production and shutdown conditions of the delayed coking unit.To compare the emission characteristics of VOCs in various process units of the S and the C refineries,the samples were collected from the catalytic cracking unit,the continuous catalytic reforming unit,and the delayed coking unit.In the continuous catalytic reforming unit,C3-C5 alkanes and low-carbon aromatic hydrocarbons were the main components collected from the S and the C refineries,accounting for 67.1%and 34.9%,respectively.For the delayed coking unit,the total weighted percentage of high carbon C6-C12 alkanes was significantly higher than other units in the S and the C refineries,accounting for 30.5%and 24.4%,respectively.In the catalytic cracking unit,the low-carbon C2-C5 alkanes were abundant,and the weighted percentage of propylene was higher.The emission characteristics obtained were consistent with the processing technology of production units.The results indicate that the VOC emission characteristics from the same production unit in different refineries have similarities and significant differences which are related to the technological process.The emission characteristics of VOCs could provide the data support for source apportionment work in the production units. | Feng Yunxia Xiao Anshan Li Bo Dong Rui Jia Runzhong Li Mingjun | 2020 | China Petroleum Processing & Petrochemical Technology2020，22，3： | 3 |
| 10 | Effects of Chinese herbs on lactation of rat and performance of offspring显示文摘An experiment was conducted to study the effects of different Chinese herbs on lactation in the rat. Seventy-two Sprague Dawley female rats at gestation day 18 were assigned to 9 groups randomly, with 8 rats each. Control rats were offered basal diets until the end of the weaning period. Rats in the other 8 groups were administered diets supplemented with 1% Medulla tetrapanacis (MT), Astragalus membranacens(AM), Vaccaria segetalis(VS), Leonurus heterophyllus sweet (LHS), Radix rehmanniae preparata (RRP), Squama manitis (SM), Schisandra chinensis (SC), Ligustrum lucidum (LL), respectively. After parturition, the litter size was culled to 8 pups per dam. Pup weight and milk yield were significantly higher in the VS, LHS, AM and SM groups than these in the control group during middle and late lactation (P<0.05 or P<0.01). The weight and feed intake were not different in the dams fed either diet. | SHI Baoming SHAN Anshan | 2007 | Journal of Northeast Agricultural University(English Edition)2007，14，1： | 3 |
| 11 | Modified halloysite nanotubes reduce the toxic effects of zearalenone in gestating sows on growth and muscle development of their offsprings显示文摘Background: Zearalenone(ZEN) is an estrogenic mycotoxin that is primarily produced by Fusarium fungi and has been proven to affect the reproductive capacity of many species to varying degrees. The present experiment was designed to study the maternal persistent effects of zearalenone toxicity in gestating sows on growth and muscle development of their offsprings, and the alleviation of zearalenone toxicity by modified halloysite nanotubes(MHNTs).Methods: Eighteen sows were fed with one of three dietary treatments that included the following:(1) a control diet,(2) a contaminated grain diet(with 50 % moldy corn, 2.77 mg/kg ZEN), and(3) a contaminated grain diet(with 50 %moldy corn, 2.76 mg/kg ZEN) + 1 % MHNTs. Each sow was exclusively fed its experimental diets from 35 to 70 d of gestation at a total of 2 kg daily. Muscle samples were collected from six piglets per treatment at birth, weaning and finishing.Results: The results showed that feeding the sows with the ZEN-contaminated diets from 35 to 70 d of gestation decreased the ADG, ADFI and G:F of their offsprings(P < 0.05). The muscle fiber numbers in the newborn, weaning and growing-finishing pigs and the muscle fiber diameters at birth and weaning were also decreased by maternal ZEN exposure(P < 0.05). The expressions of IGF-I, IGF-II, Myf-5 and Mstn at birth and IGF-II, Pax7, Myf-5 and Myo D1 at weaning were altered by feeding gestating sows with ZEN-contaminated diets(P < 0.05). The MHNTs reduced most of the ZEN-induced toxic effects: the ADG and ADFI on growth performance, the muscle fiber numbers at weaning and finishing and the muscle fiber diameters at weaning(P < 0.05). The expression levels of IGF-II and Mstn in newborn piglets and IGF-II and Myf-5 in weaning piglets were also prevented by adding 1 % MHNTs(P < 0.05).Conclusions: The present study demonstrated that the offsprings of sows fed with ZEN-contaminated diets from 35 to 70 day of gestation exhibited weakening on growth performance, physiological changes in their muscle fibers and alterations of m RNA expression in their muscle tissues, and also indicated that MHNTs prevented most of the ZENinduced weakening in the muscle tissues. | Rui Gao Qingwei Meng Jianan Li Min Liu Yuanyuan Zhang Chongpeng Bi Anshan Shan | 2016 | Journal of Animal Science and Biotechnology2016，7，4： | 3 |
| 12 | Lactobacillus rhamnosus GG ameliorates DON-induced intestinal damage depending on the enrichment of beneficial bacteria in weaned piglets显示文摘Background: Deoxynivalenol(DON) is one of the most common environmental pollutants that induces intestinal inflammation and microbiota dysbiosis. Lactobacillus rhamnosus GG(LGG) is a probiotic that not only has anti-inflammatory effects, but also shows protective effect on the intestinal barrier. However, it is still unknown whether LGG exerts beneficial effects against DON-induced intestinal damage in piglets. In this work, a total of 36 weaned piglets were randomized to one of four treatment groups for 21 d. The treatment groups were CON(basal diet);LGG(basal diet supplemented with 1.77 × 10^(11)CFU/kg LGG);DON(DON-contaminated diet) and LGG + DON(DON-contaminated diet supplemented with 1.77 × 10^(11)CFU/kg LGG).Result: Supplementation of LGG can enhance growth performance of piglets exposed to DON by improving intestinal barrier function. LGG has a mitigating effect on intestinal inflammation induced by DON exposure, largely through repression of the TLR4/NF-κB signaling pathway. Furthermore, supplementation of LGG increased the relative abundances of beneficial bacteria(e.g., Collinsella, Lactobacillus, Ruminococcus_torques_group and Anaerofustis), and decreased the relative abundances of harmful bacteria(e.g., Parabacteroides and Ruminiclostridium_6), and also promoted the production of SCFAs.Conclusions: LGG ameliorates DON-induced intestinal damage, which may provide theoretical support for the application of LGG to alleviate the adverse effects induced by DON exposure. | Yongsong Bai Kaidi Ma Jibo Li Zhongshuai Ren Jing Zhang Anshan Shan | 2022 | Journal of Animal Science and Biotechnology2022，13，6： | 2 |
| 13 | Contact between China and Africa before Vasco da Gama:Archeology, Document and Historiography显示文摘Vasco da Gama's voyage around the Cape of Good Hope to East Africaand further arrival in India in 1498 is considered as a great event inhistory. Yet contact between China and Africa started as early as in theHan Dynasty (206 B. C.- A. D. 220). Du Huan of the Tang Dynasty (618-907) left a note about his visit to Africa in the 8th century. Porcelains fromTang to the Ming Dynasty (1368-1644) were found in Africa. Ibn Battutavisited China in the Yuan Dynasty (1271-1368). There is a Chinese silkmap of Africa in the 14th century. Zheng He's junk visited Africa in theearly 15th century. This paper is intended to examine the archeologicalevidence, related documents and historiography in Chinese on earlyChina-Africa contact thus to probe the early bilateral relations. It willdivide into four parts, the study of the period of the pre-Tang Period,Tang Dynasty, Song (960-1279) and Yuan dynasties, and finally earlyMing Dynasty, respectively. It demonstrates that China-Africa contactprobably started before the birth of Jesus Christ, Africans came to Chinain ancient times through different ways, and Chinese had sailed to Africalong before Vasco da Gama. | Li Anshan | 2015 | World History Studies2015，2，1： | 2 |
| 14 | Investigation on Precipitation Hardening High Strength IF Steel Sheet for Automotive Application显示文摘High strength IF steel sheets with sufficient formability had been extensively used in automotive industry.In this paper,a new type of high strength cold-rolled IF steel with higher carbon and niobium contents was studied.Thermal plastic and continuous annealing were performed on thermo-mechanical simulator.The transformation points were tested by thermal expansion apparatus.Optical microscopy and transmission election microscope (TEM) were used to analyze the microstructure and the secondary precipitates of the steel.The results showed,the ductibility temperature range was from 950℃ to 1250℃ and the transformation points were 887℃ and 913℃ respectively.The grain size of this steel was smaller than that of conventional high strength IF steel.At the mean time,there were many fine Nb(C,N) precipitates distributed in the intra-granular regions and the PFZ (precipitate free zone) were formed in the neighborhood of grain boundaries.Due to the unique micro-structural feature,the yield strength and the yield ratio of the steel were decreased while the tensile strength was increased.With the increasing of the annealing temperature,the strength decreased,the total elongation A50,r-value at 15% strain and n-value were all increased.In order to obtain the favorable mechanical properties,the skin-pass rolling rate should be chosen at 0.6-0.8%. | WANG Xu,LIU Ren-dong,WANG Ke-qiang,GUO Jin-yu,LIN Li,XU Rong-jie (Automobile and Home Appliance Steel Institute of Ansteel Company Limited Technology Centre,Anshan 114009,Liaoning,China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S1： | 2 |
| 15 | A method of searching for supernova candidates from massive galaxy spectra显示文摘This paper presents a novel spectroscopic method for searching for supernova candidates from massive galaxy spectra,which is expected to be applied to the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST).This method includes mainly five steps.The first step is spectral preprocessing,including removing spectral noise using wavelet transform,spectral de-redshift,etc.The second step is decomposition of galactic spectra;we can get the galaxy component and supernova component and calculate the Supernova Statistical Characterization Vector (SNSCV) of each galaxy spectrum.The third step is to decrease samples in all the galaxy spectral datasets according to SNSCV of each spectrum,and to use the LOF (Local Outlier Factor)-based outlier detection algorithm to obtain the preliminary selected spectral data.The fourth step is template matching by cross-correlation,according to the matched results we get the secondary selected spectral data.Finally,we choose the final supernova candidates manually through checking the spectral features characteristic of a supernova.By the spectroscopic method proposed in this paper,thirty-six supernova candidates have been detected in a dataset including 294843 galaxy spectra from the Sloan Digital Sky Survey Data Release 7.Nine of these objects are detected first and the other twenty-seven have been reported in other publications (fifteen of which are detected and reported first by us).The twenty-four new super-nova candidates include twenty Ia type supernova candidates,three Ic type supernova candidates and one II type supernova candidate. | TU LiangPing1,2,3*,LUO ALi2,WU FuChao1 & ZHAO YongHeng2 1 Institute of Automation,Chinese Academy of Sciences,Beijing 100190,China 2 Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China 3 School of Science,University of Science and Technology Liaoning,Anshan 144051,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，10： | 2 |
| 16 | Influence of an aqueous extract of Ligustrum lucidum and an ethanol extract of Schisandra chinensis on parameters of antioxidative metabolism and spleen lymphocyte proliferation of broilers 显示文摘 | Ma Deying Shan Anshan Li Jianping | 2009 | Archives of Animal Nutrition2009，63，1： | 1 |
| 17 | Effects of Rumen Protected Methionine on Milk Yield and Milk Composition in Earlier Lactating Cow显示文摘A total of 12 mature healthy Holstein dairy cows of the nearly body weight(580 ± 30) kg,milk yield(22.5 ± 2.8) kg in the early stages of lactation were selected in this experiment.The cows were randomly divided into 2 groups,every group had 6 cows,every group had 6 repeats,and every repeat had 1 cow.Added 20 g protected methionine in earlier lactating cow food every day.The results showed that protected methionine increased milk yield by 10.83%,testing group milk yield was significantly different than that of control(P<0.05);protected methionine increased milk fat by 5.98%,testing group milk fat was significantly different than that of control(P<0.05);Milk protein increased by 2.15% ,but had insignificantly different(P>0.05);dry matter of milk had the tendency of decrease,but had insignificant difference(P>0.05). | SUN Manji SHAN Anshan | 2008 | Journal of Northeast Agricultural University(English Edition)2008，15，2： | 1 |
| 18 | Novel Concept of Cleansing the Liquid Steel by the Fine In-Situ Phase Due to the Composite Ball Explosion Reaction in RH Ladle显示文摘The production of high purity steel is a major task for the iron and steel enterprises in the 21st century. To improve the quality of steel products and produce the cleanness steel, the key technique is to control inclusions in the molten steel. In the present investigation, a novel fine inclusion removal technology due to the dispersed in-situ phase induced by the composite ball explosion reaction was put forward. A composite ball with this function has been designed and the industrial experimental investigation was also carried out. The results indicate that feeding composite ball in RH ladle is a novel technology and the inclusion in the molten steel can be removed effectively. Compared with conventional inclusion removal technology, the number of the oxide inclusion can be decreased to a lower level and the inclusion size becomes much finer. Using this novel technology, the total oxygen in the as-cast slab can approach to 6ppm and the steel production cost for per ton can be reduced by 5 -12 RMB. This novel technology can be achieved without special facility and be realized in most steelmaking plant. | TANG Fu-ping, LI Zhen, WANG Xiao-feng, FEI Peng, LIN Yang (Anshan Iron and steel group company, Anshan 114000, Liaoning, China) | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 1 |
| 19 | Influence of Mannan oligosaccharide,Ligustrum lucidum and Schisandra chinensis on parameters of antioxidative and immunological status of broflers显示文摘 | Deying M Qundao L Anshan S | 2006 | Archives of Auimal Nutrition2006，6，： | 1 |
| 20 | Boundary conditions for the bending of a piezoelectric beam显示文摘For beam bending in transversely isotropic piezoelectric media, the reciprocal theorem and the general solution of piezoelasticity are applied in a novel way to obtain the appropriate stress and mixed boundary conditions accurate to all orders for the beam of general edge geometry and loadings. By generalizing the method developed by Gregory and Wan, a set of necessary conditions on the edge-data for the existence of a rapidly decaying solution is established. The prescribed edge-data of the beam must satisfy these conditions in order that they could generate a decaying state within the beam. When stress and mixed conditions are imposed on the beam edge, these decaying state conditions for the case of bending deformation of piezoelectric beam are derived explicitly. They are then used for the correct formulation of boundary conditions for the beam theory solution (or the interior solution). Besides, an analytical solution of elastic beam is formulated to verify validity of our boundary conditions. For the stress data, our boundary conditions coincide with those obtained in conventional forms of beam theories. More importantly, the appropriate boundary conditions with two sets of mixed edge-data are obtained for the first time. | GAO Yang1, XU SiPeng2 & ZHAO BaoSheng3 1 College of Science, China Agricultural University, Beijing 100083, China 2 College of Engineering, Ocean University of China, Qingdao 266071, China 3 School of Mechanical Engineering, University of Science and Technology Liaoning, Anshan 114044, China | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，7： | 1 |
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