对减速机故障形式进行分析,采用BP神经网络建立故障诊断模型,利用遗传算法优化神经网络权值、阈值、网络结构.将遗传神经网络模型......

A model-assisted nonparametric method is investigated to estimate the finite population totals of spatial survey data ov......

提出利用线性判别函数,d(x)=W′x,对轰炸机和战斗机两类目标进行旋转不变识别。每一目标有72个旋转模式,其中9个为训练样本,63个为......

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Improved Weighted Essentially Non-oscillatory Scheme is a high order finite volume method. The mixed stencils can be obt......

Waste landfills are a prominent global issue that does not concern a country without the other because of its long-term ......

The Greek philosopher Pythagoras(ca.580-ca.500 B.C.)believed that wholenumbers,including fractions,since they areratios......

A numerical model for determining fishing net configuration and load is developed, based on the lumped masses method. Th......

Dynamic responses of track structure and wave propagation in nearby ground vibration become significant when train opera......

Social networks are becoming increasingly popular and influential,and users are frequently registered on multiple networ......

<正> In the previous paper, a relation existing between a reaction course graph G_r and the corresponding EP (eigenfunet......

<正> Microphase separation in block copolymers with well-defined structure prepared anionically has been extensively stu......

<正> At present, gossypol as the male oral contraceptive has been employed for clinical trial. Although it is an effecti......

The generalized Hamming weights and generalized weight spectra of the protective codes from degenerate Hermitian varieti......

In this paper, cluster synchronization in community network with nonidentical nodes is investigated. By combining interm......

It was found that the interface effects in viscous capillary flow influenced the process of viscosity measurement greatl......

Nitric humic acid was prepared by catalytic oxidation between nitric acid and Guizhou coal, with added catalysts. We inv......

Cationic polymers have been receiving much attention as non-viral gene vectors.The aqueous mobile phase was optimized in......

The ’living’/controlled radical polymerization (LRP) of styrene (St) at room temperature is rarely reported. In this w......

The chemical structure of heavy oil fractions obtained by liquid-solid adsorption chromatography was character-ized by 1......

The oligo(azomethine ether)s were synthesized via polycondensation of alkyl diamines with aromatic dialdehydes. Two seri......

A new model used to calculate the free energy change of protein unfolding is presented.In this model,proteins are consid......

A series of poly(9,9-dihexylfluorene)s (PDHFs) have been synthesized via microwave-assisted Suzuki and Yamamoto coupling......

In this paper, the effects of temperature from 60 °C to 80 °C and the molar ratios in monomer feed on the copolymeriza......

Long chain semiaromatic polyamides with high molecular weight were synthesized by the reactions of undecanediamine with ......

The great achievements of click chemistry have encouraged polymer scientists to use this reaction in their field. This r......

The past two decades have witnessed a rapid growth in the field of synthetic polymer chemistry,focusing on the fine cont......

An air-stable supported Cu(I) catalyst, Cu I@PS-Phen, was designed and synthesized. Cu I@PS-Phen can efficiently catalyz......

Synthesis and anionic polymerization of the fluorine-substituted phenyl methacrylates are herein reported.A series of mo......

Several new enediynes with long chain alkyl groups were synthesized through Sonogashira coupling reactions between long ......

In this study, the poly(L-lactide)/poly(D-lactide)(PLLA/PDLA) blends with different optical purities of PLLA and various......

Triphenylphosphine(TPP) was used as reducing agent to continuously generate the Cu(I) activator in copper(II)-catalyzed ......

A numerical method is developed to compute the development of molecular weight distribution (MWD) curves of linear polym......

Abstract The intrinsic relationship between molecular chain length and the probability of chain reaction during poly(lac......

A series of half-titanocene chloride 2-(benzimidazol-2-yl)quinolin-8-olates C1 C6 were synthesized by treating the lithi......

A series of nickel halides bearing 2,4-di-t-butyl-6-(quinolin-8-yliminomethyl) phenolate ligands was synthesized and cha......

Crystal patterns in ultrathin films of six poly(ethylene oxide) fractions with molecular weights from 25000 to 932000 g/......

Poly(aryl ether ketone)s (PAEKs) were successfully synthesized via nucleophilic aromatic substitution (SNAR) mechanism, ......

The syntheses, structures and catalytic activities of two yttrium complexes supported by pyrrolide ligands are reported.......

AIM: To compare the outcomes of pediatric patients weighing less than or more than 10 kg who underwent liver transplanta......

Dynamic control of reservoir limited water level is important to reservoir flood control operation.A reasonable limited ......

BACKGROUND:The Broselow?Pediatric Emergency Tape indicates standardized,precalculated medication doses,dose delivery vol......

The fluorescence property of bovine serum albumin was investigated in the presence of PEGs of different molecular weight......

Polypeptides and polypeptoids were widely used as biomedical materials because of their good biocompatibility.In this wo......

Juvenile(2-3 years old) cynomolgus monkeys are frequently used as recipients in non-human primate islet transplantation ......

The fuzzy theory is invited in this paper to calculate weights of evaluation items, which is a very important stage in h......

A new compound Ca2PdWO6 has been synthesized by solid state sintering. The phase transition of this compound was invest......

Reaction of a 1, 2, 4, 5-tetraoxane with cysteinate-iron in thepresence of excess methyl cysteinate led to formation of......

IF the rates of an enzyme-catalysed reaction are equally weigh-ted in least-squares analysis,the corresponding reciproc......

An optimal design approach of high order FIR digital filter is developed based on the algorithm of neural networks with......