考虑边界条件的频率法测索力实用公式

通过两端固结梁和两端铰接梁的频率特征方程,在找出了二者的频率关系后,建立了一个形式简单、物理意义明确的索力计算公式.和同类方法的对比分析结果表明,该公式具有更好的计算精度和适用范围,使用该公式可以快速、准确地识别出不同长细比、抗弯刚度拉索的索力.分析了拉索边界条件对索力计算结果的影响,提出了考虑拉索端部转动约束刚度的索力计算公式.     

Myoglobin as Mimetic Enzyme and Its Analytical Application in Determination of H2O2

0 IntroductionSltougdiiceasl csoynstceermnsin gharveeac btieveen o txhyeg ei nm psopretcaienst ( oRbjOecSt) iinn bbiioo--medicine and analytical chemistry in recent years[1-4]. Manyi mportant life phenomena and diseases are relatedtotheinter-mediates of ROS[5-7].ROS have beeni mplicated as ani mpor-tant causative factor in cell damage,including apoptosis andnecrosis . Their proposed actions comprise lipid peroxidation,DNAdamage,the mitochondrial respiratory chain destructionand protein mo…     

Synthesis and Characterization of Polyamide-Containing 2, 6- （Substituded） pyridine Derivatives

0 IntroductionPayrriodminaetiics hoenteer oofc ythcleics m .os tC oambupnoduanndts a cnodn tbaeisntin kgno twhnepyridine ring are widely distributedin nature,principally asenzymes and alkaloids . Pyridine enzymes have been foundintissues of all plants and ani mals examined thus far ,andare derivedfromeither nicotinic acid or Vitamin B6[1].Pyr-idine derivatives are also the building block of many phar-maceuticals with a wide range of functionalities that includeantitubercular compounds ,antivi…     

Simulation of the RCS Range Resolution of Extremely Large Target

,,,.lr.0　IntroductionThe RCS(Radar Cross Section) of a target in the near zone is very important in the various civilian and militaryfields. For a complex target, we dissect it in the near zone tomany small regions and simulate the RCS of the the whole …     

The Effect of cdk-5 Overexpression and Overactivation on Tau Hyperphosphorylation in Cultured N2a Cells

0　IntroductionNeurofibrillary tangle, primarily composed of thehyperphosphorylated microtubule associatedprotein tau[1], is one of the major neuropathologichallmarks in Alzheimar’s disease (AD). In affectedneurons, the major mechanism o…     

Analysis of Male Sterility-Related Proteins of Young Panicle in Rice (Oryza sativa L.) by Two-Dimensional Electrophoresis

0Introduction Malesterilityisacomplicatedphenomenoninhigherplants,whichestablishesthebiologicalbasisofhetero sisutilizationincropsbreeding,especiallyinrice(Oryzasati vaL.).Themolecularandphysiologicalresearchinplantmalesterility,especiallythediscoveryofth…     

Risk Factors of Cervical Carcinoma and Countermeasures against Them in Mountainous Area of Wufeng County ， China

0Introduction Cervicalcarcinomaisoneofprevalentmalignancy,itisthesecondmostcommoncancerofwomenintheworld wide(thefirstisbreast cancer).Itisestimatedthatthereare450000newcasesinworldeveryyear,ofwhich80%arein developingcountries.Thereare135000newcasesinChin…     

The Modulation of Ionospheric Alfvén Resonator on Heating HF Waves and the Doppler Effect

0　IntroductionIthasbeenwellknownthattheformationofIonosphericAlfv啨ｎＲｅｓｏｎａｔｏｒ(IAR)isforthebreakdownofgeometricop tics.ItscentralregionliesneartheheightofF regionelectrondensitypeak .Andatthetypicalheightof 30 0 0kmexiststhemaximumgradientofAlfv啨ｎｖｅｌｏｃｉｔｙ ,whichleadstothereflec tionofshearAlfv啨ｎｗａｖｅｓａｎｄｐｒｏｄｕｃｅｓｔｈｅｕｐｐｅｒｂｏｕｎｄａｒｙｏｆｔｈｅｒｅｓｏｎａｔｏｒ.Likewise,thelowerboundaryoftheresonatorformsneartheheightof 2 0 0 30 0km .Thus,she…     

Implementation of Texture Based Image Retrieval Using M-band Wavelet Transform

0　IntroductionItisbecomingwellknownthatsignalandimageprocessingaregettinggreatimprovementsinperfor mancebyusingwaveletbasedmethods.Wavelettheoryhasbeenfoundtobeausefulapproachinsignalandimageprocessing .Theresultsofwavelet basedimageanalysismethodsaresuperiortothoseobtainedbyusingtraditionalapproaches[1 ,2 ] .But 2 bandwaveletanaly sisisnotaveryeffectivemethodforfeatureextractionorpatternrecognition ,forthepartitionofhighfre quentbandsisquitecoarserin 2 bandwaveletdecom position ,whichisnot…     

L1/2正则化问题的最优性条件及下降算法

主要研究L1/2正则化问题.首先给出了该问题的最优性条件的分析，得到了一阶和二阶必要条件，同时给出了二阶充分条件.这些最优性条件可以看作是光滑函数最优性条件的推广.在此基础上，提出了一种下降算法，并给出了该算法的全局收敛性分析.该算法可以看作是最速下降法的推广.