关于蒙牛公司成长性的实证应用研究     

杨艳 《内蒙古师范大学学报(哲学社会科学版)》2006,35(4):69-72

成长性作为企业努力追求的目标之一，一直是理论界关注的焦点，然而目前某些本来具有良好成长性的企业会突然面临现金短缺的危机。笔者以企业融资结构理论为基础，以高速成长型企业蒙牛公司为例。运用一种有效的财务计算方法，既能有效预测企业的成长速度，又能帮助企业克服因高速成长所带来的现金短缺问题。  相似文献   

Ott循环中温度的Lorentz变换     

夏谦 《衡阳师范学院学报》2004,25(3):38-39

在介绍汤川秀树理想实验的基础上，指出其存在的不足，并对其进行修正，从而再次得到运动参考系中物体温度降低的P—E理论结论。  相似文献   

Reducing students’ carbon footprints using personal carbon footprint management system based on environmental behavioural theory and persuasive technology     

Shyh-ming Lin 《Environmental Education Research》2016,22(5):658-682

This study applied environmental behavioural theories to develop a personal carbon footprint management system and used persuasive technology to implement it. The system serves as an educational system to improve the determinants of students’ low-carbon behaviours, to promote low-carbon concepts and to facilitate their carbon management. To assess the validity of the system, high school students were chosen to participate in an experiment, the results of which reveal (1) the system has significant and positive short-term and relatively long-term effects on the reduction of their self-reported carbon footprint, (2) the system significantly improves their carbon footprint awareness and perceived behavioural control (PBC), and it also promotes behavioural subjective norms, (3) reduction of their self-reported carbon footprint is significantly correlated to PBC, carbon footprint awareness and attitude and (4) PBC is the most critical determinant of carbon reduction. Suggestions are accordingly made.  相似文献   

浅析公关在产品销售中的作用     

姚卫如  刘海霞 《商丘职业技术学院学报》2004,3(2):18-19

公共关系不仅能树立企业形象，而且能有效促进产品销售，企业应对此有充分认识。在产品市场寿命周期的不同阶段，分别策划、实施不同的公关活动，将能更好地增加销量、提升产品形象、延长其市场寿命。  相似文献   

利用混沌吸引子的不稳定周期轨道的保密通信     

杨凤霞 《沧州师专学报》2003,19(1):46-48

混沌系统的特性可用其混沌吸引子在相空间中的轨迹来表征。大量的研究表明、一个混沌吸引子是由无穷多个不稳定的周期轨道所组成的。通过对不稳定周期轨道的幅度或相位进行调制，则可实现对信息的保密传输。据此，在一个混沌时间序列的每一个不稳定周期轨道中、通过调制不同的信息流，就可以用单一的混沌时间序列来传输多路信息。  相似文献   

再论向量场X(v)=Av+f(v)v的极限环     

何永葱 《内江师范学院学报》2004,19(4):5-7

得到了向量场有极限环的必要条件是2×2矩阵A有复特征值,以及讨论了极限环存在和唯一的一些充分条件,这里f(v)也许是非齐次函数。  相似文献   

5-溴水杨醛甘氨酸修饰碳糊电极测定微量Cu2+的研究     

匡云飞  邹建陵  李薇  杨颖群 《衡阳师范学院学报》2006,27(6):44-46

在pH=9.0 H3BO3-Na2B4O7缓冲体系中,以5-溴水杨醛甘氨酸修饰碳糊电极为工作电极,Cu2 于 120mV(vs.SCE)处产生一灵敏的吸附波,其二阶导数峰电流与Cu2 浓度在4.0×10-9~8.0×10-7mol.dm-3范围内呈良好的线性关系,相关系数为0.9964,检出限为6.0×10-10mol.dm-3(3倍信噪比)。应用该法测定发样中Cu2 的含量,结果令人满意。  相似文献   

静电场环路定理在静电场中的地位及应用     

孟彩荣 《忻州师范学院学报》2004,20(2):79-81

文章从静电场力作功的特点出发，说明静电场是保守力场。然后通过与高斯定理比较，阐述了静电场环路定理在静电场中的地位。并通过两个典型例子说明静电场环路定理的应用。  相似文献   

Poly—ACBK／MWNTs／GC电极在异构体存在下伏安法选择测定邻苯二酚     

《九江师专学报》2007,26(3):78-81

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Phase Transformations of Graphite and Carbon Black by Laser with Low Power Density     

孙景翟琪  雷贻文杨星 杜希文 《天津大学学报(英文版)》2007,13(5):318-321

The structure phase transformations of graphite and carbon black induced by pulsed laser were studied in this paper.Under irradiation with laser beam of 1.06 μm wavelength and power density of 106 W·cm-2,both graphite structure and carbon black structure were changed obviously.The results of Raman analyses and Transmission Electron Microscopy(TEM)observations show that graphite transforms into nanodiamond about 5 nm and carbon black is graphitized.It is demonstrated that graphite is the intermediate phase in the transformation from carbon black to diamond,and graphite is easier to transform into diamond by laser irradiation than carbon black.  相似文献