一类奇异半线性反应扩散方程组整体解的存在性

本文讨论了一类奇异半线性发展方程组整体解的存在性,运用比较不等式得到了在一定条件下一类奇异半线性发展文程组整体解的存在性。     

连续函数最大值、最小值求法之补充

本文对开区间和半开半闭区间情形下连续函数的最大值、最小值的存在性及求法进行了讨论.     

一类带Neumann边界条件的半线性椭圆方程正解的存在性

利用变分法讨论了一类带Neumann边界条件的半线性椭圆方程正解的存在性,并得到了在下临界指标时的两个存在性定理.     

关于连续函数最值问题的补充

讨论了开区间和半开半闭区间上连续函数的最值问题,获得了一系列最大值、最小值的存在性结果以及相应求法.     

实半单Lie代数的Iwasawa分解的存在性

讨论了实半单Lie代数Iwasawa分解的存在性问题.     

半马氏MDP平均模型

研究了半马氏MDP平均模型,提出了新的较弱的假设条件,证明了半马氏MDP平均模型最优方程解的存在性,然后从最优方程出发,证明了存在ε（≥0）－最优平稳策略。     

半线性椭圆型方程解的存在性

在没有Landesman-Lazer型约束条件的情况下,获得了一类涉及第一特征值的半线性强振动方程非平凡解的存在性．     

一类半线性椭圆方程的多解性(英文)

讨论TRN中的一类半线性椭圆方程边值问题多个正解的存在性及其分歧.     

半线性抛物型方程组的有限行波解(英文)

讨论一类半线性抛物型方程组有限行波解的存在性和渐近性质．     

集值映射的连续锥选择及其存在性

引入集值映射的锥选择及连续锥选择概念,给出了集值映射连续锥选择的存在性条件以及锥下半连续集值映射的逼近连续锥选择的存在性条件。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

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/     

漏洞百出的教育

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?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

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.     

浅谈移民问题

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.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.