水利工程质监机构改革初探

水利工程质量监督机构的改革，要适应我国宏观经济的发展、水利工程质量监督内在发展规律，因此必须要加大执法力度，从而促进水利工程质量的提高，推进国民经济的发展。     

Land cover classification of remotely sensed image with hierarchical iterative method

Land cover classification is one of the most wide ly used applications of remote sensing. The use ofmultitemporal remote sensing data in land cover clas sification is one of the effective methods of obtainingaccurate land cover/land use data. For a particularimage, different land cover types often show a similarspectral response and are difficult to separate. Theadvantage of using multitemporal data is that differentvegetation types show different spectral characteristicsin…     

Constructing a quasi-Legendre basis based on the C-Bézier basis

Inmostcomputeraideddesign(CAD)andcom puteraidedgeometricdesign(CAGD)systems,the BernsteinpolynomialsrepresentationofB啨ziercurves andsurfaceshasbeenastandard.Legendrepolynomi alshavesomeremarkableproperties.Firstly,Legen drepolynomialsconstituteanorthogonalbasisandthe degreeoftheLegendrebasisfunctionsgraduallyin creases,whichallowsthecoefficientsoftheapproxi mationtobedetermineddirectlywithoutneedingto solvealinearsysteminmanygeometricoperations whereapproximationisinvolved.Forexample,Lie…     

物理学五大规律的比较

牛顿运动定律、动量定理、动量守恒定律、动能定理、机械能守恒定律等五条规律是经典物理学的基础 ,也是整个高中物理的核心内容 ,是中学物理的主干知识。中学物理就是围绕这些定理、定律的应用。这些规律既有区别 ,又有联系 ,掌握了这些定律的区别和联系 ,才能更好的理解它们 ,才有可能去灵活地应用这些规律。下面先用一个表格从每个规律所涉及的物理量简要说明它们之间的区别 ,从而找到一种迅速准确的选用物理规律的方法。五大规律所涉及的物理量物理规律研究对象适用条件表达式所涉及的物理量备　注牛顿运动定律质点经典物理学范畴Ｆ =ｍ…     

Atomic-scale computer simulation for early precipitation process of Ni_(75) Al_x V_(25-x) alloy with intermediate Al composition

SincethepublicationoftheclassicalworkofChan[1] andHilliard[2 ] ,therehavebeenextensiveex perimentalandtheoreticalstudiesonthethermody namicsandkineticsofprecipitation process .Recentresearchworkhasbeenconcentratedoncomputersimulation ,mostofwhichwerereviewedbyChen[3] .Mostcomputersimulationswerecarriedoutinbinarysystems[4— 8] .However ,theternaryormulti compo sitionsystemsaremoreimportantinindustries .MechanicalpropertiesofNi Albasedsuperalloyscanbestronglyaffectedbythemorphology ,distribu …     

SINGULARLY PERTURBED MARKOV DECISION PROCESSES WITH INCLUSION OF TRANSIENT STATES

1 IntroductionMarkov decision processes (MDP) have drawn much sttention because of their capabilityin dealing with a wide range of application under UnCertainty. Many problems in operationsresearch such as resource allocation, queueing networks, and maChine replaCement etc., fit wellin the framework of Markov decision processes. Classical aPProaChes of discrete-time MDPmodels can be foUnd in Dermanll], RDssIZ], and ~e[3] among others.Because most of the systems in real life are large a…     

Expression of human clotting factor Ⅸ mediated by recom- binant lentiviral vector in cultured cells and hemophilia B mice

Hemophilia B, a serious bleeding disorder, is an inherited X chromosome-linked disease for the deficiency or inactivity of human clotting factor Ⅸ (hFⅨ). Though factor substitution therapy has greatly improved the lives of hemophiliac patients, there are still limitations to the current treatment, which have triggered interest in alternative treatments by gene therapy[1]. Based on preclinical studies in rabbits[2], our lab had first initiated an ex vivo gene therapy clinical trial whereby a…     

爱若琴弦

66岁的她静静地站着。“这是我在这个世界里的最后一天了,等到今天过去,我会永远的离开这个世界。”她这样想着,并留恋地看着自己的影子、自己亲手一砖一瓦建起来的城邦和曾经每天陪着自己练功的那150个女仆。“不要再想了,都已经决定了的事。”她勉强地给自己一个笑容。“直的决定了吗?”他问。