查询词典 null hypothesis

By discussing the position hypothesis of fractional-dimension derivative about general function and the formula form the hypothesis of fractional-dimension derivative about power function, the concrete equation formulas of fractional-dimension derivative, differential and integral are described distinctly further, and the difference between the fractional-dimension derivative and the fractional-order derivative are given too. Subsequently, the concrete forms of measure calculation equations of self-similar fractal obtaining by based on the definition of form in fractional-dimension calculus about general fractal measure are discussed again, and the differences with Hausdorff measure method or the covering method at present are given. By applying the measure calculation equations, the measure of self-similar fractals which include middle-third Cantor set, Koch curve, Sierpinski gasket and orthogonal cross star are calculated and analyzed.

通过讨论一般函数的分维导数的位置假设及幂函数的分维导数的形式假设，进一步明晰了幂函数的分维导数、分维微分及分维积分的具体方程形式，给出分维导数与分数阶导数的区别，随后讨论了基于一般分形测度的分维微积分形式定义导出的自相似分形的测度计算方程具体形式，给出了其与目前 Hausdorff 测度方法的区别，并对包括三分 Cantor 集合、 Koch 曲线、 Sierpinski 垫片及正交十字星形等自相似分形在内的测度进行了计算分析。

This paper first summarizes the existing western economic explanations on corporate diversification, such as scope economy theory, resource-based theory, defense hypothesis, market power theory, transaction cost theory, internal capital market theory, coinsurance hypothesis, and agency theory. Then according to the situation in China, the paper discusses another explanation proposed by domestic scholars, i.e.

本文首先归纳了西方现有对企业多元化动因的八种经济解释（范围经济理论、资源依赖理论、防御假说、市场力量理论、交易成本理论、内部资本市场、债务互保假说与代理理论），并针对国内情况分析了国内学者提出的市场分割假说。

We discuss the serial M-ary multisensor decentralized data fusion based on Neyman-Pearson principle, especially on multiscale hypothesis test based on composite hypothesis.

建立了基于Neyman-Pearson准则的串行M元多传感器数据融合和复合假设测试的定义和统计特性标准，引入了基于复合假设测试的多尺度假设测试。

Secondly, based on the FO estimate, we formulate the timing error and channel estimation as a problem of composite hypothesis testing according to the first signal model, and then solve the problem by the composite hypothesis testing approaches.

该估计方法包括两步：第一步是根据第二个系统模型，推导了一种有效的最大似然频偏估计器；第二步是根据所获得的频偏估计值，利用第一个系统模型，将定时误差和信道估计表示成一个复合假设检验问题，然后再利用复合假设检验方法进行定时误差和信道估计。

In order to get reliable diagnosis results,a composite hypothesis of the normal nose signal and faulty noise signal is constructed,and by testin that hypothesis,faults can be detected accurately.

试验验证表明，该方法能有效地诊断摩托车发动机存在的活塞击缸故障。

In the test of weak-form efficient hypothesis, this thesis used auto regression, auto correlation function and unit root three models, and got the basically same results. In the test of semistrong-form efficient hypothesis, this thesis used market model, index return model and constant mean return model three ways to estimate the normal return when making use of event study, and the results were also basically same.

其中，为求全面和比较，在对弱势有效市场的假说的检验部分，本文运用了自回归检验、自相关函数检验和单位根检验三种计量模型，检验结果基本一致；在对半强势有效市场假说的检验部分，本文运用了事件研究法，并在估计正常收益率时使用了市场模型、指数收益模型以及均值模型三种方法，估计结果也相对一致。

Being based on the acknowledgement of continuum medium hypothesis, it has made an analysis of some general movements of macro material, which points out that there are a series non-consistence problems in logic in the Cauchy's stress theory and Stokes's stress hypothesis, etc.

除了指出 Cauchy 的两个应力定理， Stokes 应力假设等存在的逻辑不自洽问题，并产生的原因进行了系统分析以外，演绎地构造了连续介质物质模型严格假设下的完整形式表述体系，并且演绎地导得这个演绎体系必然导致三维物质流形，在三维 Euclid 空间中恒为超定。

In addition, the presence of flight feathers on the hindlimbs is inconsistent with the cursorial hypothesis and the Jesus-Christ hypothesis because flight feathers on the hindlimbs would seemingly limit running speed.

此外，在场的飞羽对后肢不符合cursorial假说和耶稣-基督的假说，因为飞羽对后肢将看似极限运行速度。

Primary among them are the arboreal hypothesis (eg, Feduccia 1996), with the ancestors of Archaeopteryx living in trees (or at least climbing into trees on a regular basis) and initially gliding before developing flapping flight, and the cursorial hypothesis (eg, Burgers and Chiappe 1999), with these ancestors using long, powerful legs to run fast with their arms outstretched and, eventually, developing sufficient lift to take flight.

小学它们之间是树栖假说（例如，费多契亚1996年），与祖先的始祖鸟生活在树上（或至少攀爬到树木的定期）和最初的滑翔之前，发展中国家扑飞行，以及cursorial假说（例如，汉堡和chiappe 1999年），与这些祖先的长期使用，强大的腿跑得快，与他们的武器 outstretched ，并最终发展有足够的电梯采取飞行。

Firstly, This thesis described the development of Efficient Market Hypothesis in detail, and summarized the former demonstrational test. Then it made a deep analysis for the hypothesis from the perspective of behavioral finance, which is on the opposite of modern standard finance.

本文首先对有效市场假说的理论发展作了详尽的叙述，总结了前人的实证检验结果，并从现代标准金融学的对立面，即行为金融学的角度对有效市场假说进行了深入的分析。

Don't listen to their haver, nothing of that sort.

别听他们胡说八道，根本就没那回事。

But bank's shares trade below their book value, suggesting that investors are skeptical.

但是，银行股票以低于账面价值的价格交易，这一点反应了投资者的怀疑。