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1.
模糊集理论几十年来在各个领域都得到非常广泛的应用,特别是它在模糊控制方面的应用,说明模糊集理论在很大程度上确实反映了客观的规律。模糊技术应用最关键的一步是确定相关模糊集合的隶属函数。然而,隶属函数的确定却很大程度上依赖于研究者的主观理解,这种主观性与科学客观性的矛盾一直成为人们关注的缺陷。本文在作者的另一篇文章《L-模糊集的同构和同态》中讨论了两个L-模糊集同构(同态)的的充要条件及有关性质,进而给出L-模糊集的本质刻画。在此基础上,我们研究了模糊关系的同构和同态,定义了L-模糊集合的局部同构和局部同态,讨论了基于同构和同态条件下的L-模糊集运算的性质。揭示了“由于研究者的主观理解不同,所给出的模糊隶属函数也不相同,但往往研究的结果却相同或相似”这一现象的本质原因,加深了人们对模糊集的本质理解。  相似文献   

2.
将KyFan截口定理推广到L-凸空间,作为应用,在L-凸空间上进一步推广了Browder不动点定理,并研究了向量值函数的极大极小值,极大极小不等式以及鞍点问题。  相似文献   

3.
利用熵准则函数对L-色氨酸发酵过程中的菌体生长过程进行建模并预测,这种方法一改传统MSE准则函数的基于局部性原理提出从全局出发从而进行参数训练,这种方法较MSE准则有较强的预测精度和鲁棒性。  相似文献   

4.
本利用Dirichkt L-函数的均值定理研究Dedekind和的值分布性质,并得到两个均值公式。  相似文献   

5.
在平衡损失函数下的泛最小二乘估计   总被引:1,自引:0,他引:1  
从平衡损失函数的角度研究线性回归模型的泛最小二乘估计.用L-曲线的方法得到了平衡参数的简单而又实用的公式,研究了泛最小二乘估计量的风险函数,并用一个实际应用说明了本文的结论.  相似文献   

6.
利用Kloostermann和估计、特征和估计及其解析方法给出了Dirichlet L-函数加权均值分布问题的一个推广,得到一个有趣的加权均值分布的渐近公式.  相似文献   

7.
作为特征和估计的应用,利用Dirichlet L-函数均值定理以及特征和的性质研究一个类Dedekind和的均值问题,并给出了一个较为精确的渐近公式.  相似文献   

8.
Dirichlet L-函数的一个四次加权均值分布   总被引:1,自引:0,他引:1  
利用Kloostermann和估计及其解析方法研究了Dirichlet L-函数的一个四次加权均值分布,得到一个有趣的加权均值分布的渐近公式.  相似文献   

9.
用Gauss和的性质、三角和估计、特征和的性质及其解析方法讨论了Dirichlet L-函数的2k次加权均值分布问题,得到一个推广的加权均值分布的分布公式。  相似文献   

10.
介绍了基于L-系统的分形图形、迭代函数系统IFS方法、粒子系统模型方法和随机插值法4种分形的产生方法,讨论了它们各自的特点和适用领域,并给出各种方法的典型例证.  相似文献   

11.
汉字倒说     
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。  相似文献   

12.
《海外英语》2007,(5):44-45
It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,  相似文献   

13.
一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/  相似文献   

14.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?  相似文献   

15.
钱生钱!     
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了  相似文献   

16.
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex.  相似文献   

17.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.  相似文献   

18.
王菲 《华章》2007,(12):273-273
Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.  相似文献   

19.
现在,我们可以没有面包,没有钱,没有房子,没有车子……但我们唯独不能丢失的是高尚的情操,笃定的信念,还有,满满的希望!  相似文献   

20.
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator's Garden. Translating building data to the Virtual Reality Modeling Language (VRML) is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching.  相似文献   

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