用复合函数测定牛累积生长曲线的探讨

用复合函数测定牛累积生长曲线的探讨李秀元朴金日朴彩粉（吉林省延边农科院畜牧研究所龙井１３３４００）赵完现李文用（延边农学院畜牧系）引言牛体重的累积生长在直角座标系中的散点图均成为Ｓ型曲线，是人们所熟知的。对Ｓ形曲线的数学表达式是用各种回归式来表示，现...

普通话言语测听材料

言语测听是一种很重要的言语能力评估手段。我国地域广阔,方言多样,测试材料不易统一,测试设备不易购置,导致言语测听开展得不够普及。因此需要一套完整的、集测听材料和测听软件于一体的言语测听系统来改变国内当前状况。本文阐述了北京市耳鼻咽喉科研究所研发的普通话言语测听材料MSTMs(Mandarin Speech Test Materials)的编制原则、录音合成、等价性分析等,对MSTMs的组成以及相应的识别-强度函数测定也做了介绍。

The comprehensive measure model for urban traffic congestion based on value function

According to the distribution characteristics of traffic congestion in time and space, a measure index system of urban traffic congestion is set up based on the spatial and temporal distribution. Based on the analysis of the main characteristics of traffic congestion and the generation process of traffic congestion, the measure model for urban traffic congestion is constructed by the value function. Moreover, based on the measure values of traffic congestion in urban road networks with defined different levels, a method to prevent and control traffic congestion is designed. The application results confirm that the proposed method is feasible in comprehensive measures for urban traffic congestion and they are consistent with the results of other methods. The measuring results can therefore reflect the actual situation. The comprehensive measure model is scientific and the process is simple, and it has wide application prospects and practical value.

Multiresolution edge detection based on modified bubble function and SWT

A new way based on a modified bubble function and stationary wavelet transform(SWT) is proposed to solve the problem that the conventional edge detection algorithms are sensitive to the noises.Firstly,the traditional bubble function is modified in order to get different time-frequency domain responses and to get filtering effects through adjusting the parameters. Secondly, the modified bubble function is combined with SWT to construct a multiresolution network. By using the modified bubble function to enhance the edges and by using SWT to reduce the noises, the edges can be extracted accurately,effectively and quickly with lower noise.Finally, the experimental results of the proposed edge detection algorithm are verified to be better than that with the traditional bubble function.

The quantification of quantum nonlocality by characteristic function

We propose a way to measure the strength of quantum nonlocal correlation (QNC) based on the characteristic function, which is defined as a response function under the local quantum measurement in a composite system. It is found that the strength of QNC based on the characteristic function is a half-positive-definite function and does not change under any LU operation. Generally, we give a new definition for quantum entanglement using the strength function. Furthermore, we also give a separability-criterion for 2×m-dimensional mixed real matrix. This paper proposes an alternative way for QNC further research.

Heating graphene to incandescence and the measurement of its work function by the thermionic emission method

The work function （WF） of graphene is an essential parameter in graphene electronics. We have derived the WF of graphene by the thermionic emission method. Chemical vapor deposition （CVD）-grown single-layered polycrystalline graphene on copper foil is transferred to a cross-stacked carbon nanotube （CNT） film drawn from a super-aligned multiwalled CNT array. By decreasing the pore size of the CNT film, the as-prepared CNT-graphene film （CGF） can be Joule heated to a temperature as high as 1,800 K in vacuum without obvious destruction in the graphene structure. By studying the thermionic emission, we derive the WF of graphene, ranging from 4.7 to 4.8 eV with the average value being 4.74 eV. Because the substrate influence can be minimized by virtue of the porous nature of the CNT film and the influence of adsorbents can be excluded due to the high temperature during the thermionic emission, the measured WF of graphene can be regarded as intrinsic.

Determination of the limits for multivariate rational functions

The purpose of this paper is to solve the problem of determining the limits of multivariate rational functions.It is essential to decide whether or not limxˉ→0f g=0 for two non-zero polynomials f,g∈R[x1,...,xn]with f(0,...,0)=g(0,...,0)=0.For two such polynomials f and g,we establish two necessary and sufcient conditions for the rational functionf g to have its limit 0 at the origin.Based on these theoretic results,we present an algorithm for deciding whether or not lim(x1,...,xn)→(0,...,0)f g=0,where f,g∈R[x1,...,xn]are two non-zero polynomials.The design of our algorithm involves two existing algorithms:one for computing the rational univariate representations of a complete chain of polynomials,another for catching strictly critical points in a real algebraic variety.The two algorithms are based on the well-known Wu’s method.With the aid of the computer algebraic system Maple,our algorithm has been made into a general program.In the final section of this paper,several examples are given to illustrate the efectiveness of our algorithm.