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Using algebraic methods which include extended Tanh-method,some new solitary solutions to the DBM and Log-DBM equation,such as singular solitary solutions,double singular peakon solitary wave solutions,double solitary wave solution with peakon and singular periodic solitary wave solutions are obtained..With the aid of an auxilitary function combined with the elliptic integral of the first kind,periodic solitary solution,singular and periodic singular solitary solutions can be obtained.
第三章利用扩展的Jacobi椭圆函数展开法研究了方程,并给出ZK-MEW方程的Jacobi椭圆函数解,特别的,当模数m→0和m→1时,其中一部分解退化为三角函数解和孤立波解;其次使用sn-cn拟设法,研究了K(k,s,1)方程,得到了k=s=3时的新的精确解,并在模数m→0和m→1时得到了丰富的三角函数和孤立波解。
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The influences of the shock thickness and Alfven waves on the particle acceleration by diffusive shock waves are numerically studied through solving one-dimensional diffusive equation including the second-order Fermi effect. It is shown that the spectral index of the energetic particles strongly depends on the shock thickness. For example, the spectral index increases from 2.1 to 3.7 in the low energy range of 3-10 MeV and from 2.5 to 5.0 in the high energy range of 20-60 MeV as the thickness increases. The spectral index decreases from 4.3 to 3.1 as the particle injection energy increases. The spectral index decreases from 4.0 to 1.8 at the quasi-steady stage with the enhancement of the compression ratio from 2 to 4. The results indicate that under the influence of Alfven waves, the energetic particle spectrum at lower energy becomes flat and the spectral index decreases from 2.5 to 0.6 in the low energy range of 3-10 MeV and from 11.6 to 5.0 in the high energy range of 20-60 MeV. At the same time, the rollover energy reaches 19.6 MeV. The spectral index decreases from 5.8 to 2.9 as the energy density of Alfven waves increase. All these results are basically consistent with the theoretical models, as well as the observations of typical energetic particle events.
通过数值求解包含二阶费米加速的一维扩散方程,探讨在准平行激波条件下激波厚度和级联阿尔芬波对粒子加速的影响,研究粒子分布函数的演化与激波厚度和阿尔芬波强度的内禀关系,计算结果表明:(1)考虑激波厚度时,谱指数明显依赖于激波厚度,随着厚度从0.32增大到2.56,低能端(3-10MeV)谱指数逐渐从2.1增加到3.7,高能端(20-60MeV)谱指数从2.4增大到5.0,能谱逐渐变软;当初始注入粒子动量增大1.3倍,质子能谱指数从4.3减小到3.1,且与零厚度激波加速的谱指数差值缩小;厚度不变时,随着压缩比从2增加到4,准稳态分布时低能端(3-10MeV)粒子能谱指数逐渐从4.0减小到1.8谱变硬;(2)在级联阿尔芬波的影响下,随着时间的增大,粒子在低能处(3-10MeV)的谱指数从2.5减小到0.6高能端(20-60MeV)谱指数从11.6减小到5.0,能谱变硬,拐点能量值从7.5MeV增大到为19.6MeV;随着波的能量密度增大,谱指数从5.8减小到2.9,这表明阿尔芬波强度越大,加速效率越高,通过与激波厚度解析结果和高能粒子事件的观测能谱比较发现两者是一致的,说明数值模拟结果是可靠的。
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The SiC slurry catched high thixotropy when the SiC powders were coated all by hydrophile groups, and the viscosity of the SiC slurry would increase 1236.0mPas suddenly when its solid loading added from 57.4% to 58.5%; If the SiC powders were coated by lipophile group, the thixotropy of the SiC slurry would reduce and the enhancive scope of the high solid loading SiC slurry's viscosity would also be weakened.
改性粉表面全是亲水基团时,料浆触变性大,当固相体积含量由57.4%上升到58.5%时,料浆粘度突然增大1236.0mPaS;随着亲油基团的引入,料浆触变性降低,高固相含量时粘度增大平缓。
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At the age of 12 I experienced a second wonder of a totally different nature: in a little book dealing with Euclidean plane geometry, which came into my hands at the beginning of a school year.
在我12岁时,我经历了另一种性质完全不同的惊奇:这是在一个学年开始时,当我得到一本关于欧几里得平面几何的小书时所经历的。
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Children will not have the awareness to expectorate sputum, sputum to the pharynx when入胃with automatic pharynx. Also, because children often accompanied by vomiting, coughing, vomiting from the stomach is often out of mucinous things, pharynx入胃of sputum with food through the entire digestive tract, and finally eliminated from the body with the stool. Therefore, many infants and young children cough have diarrhea.
小儿咳嗽用药应注意:1)疾病的初期,特别是痰不易咳出时,勿滥用止咳药,否则痰液会阻塞于呼吸道,痰内的细菌得到繁殖机会,反而会使病情加重;2)不适当的使用止咳药也会掩盖病情;3)在医生的指导下服用,如当过频的咳嗽影响到小儿的睡眠,甚至引起支气管毛细血管破裂出血时,可以适当使用止咳药,若痰量多不易咳出时,要同时使用抗菌和化痰药
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The number of premature ventricularcomplexes during the ischemic period (54 ± 3) was reducedby FENT 50 (19 ± 7), an effect blunted by central (40± 3) but not peripheral (18 ± 7) blockade of OR.
使用 FENT 50时,缺血期间心室合成物前体数量降低(由54 ± 3降至19 ± 7),而当中枢 OR 阻滞时,这种保作用消失(40± 3),外周 OR 阻滞时没有影响(18 ± 7)。
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A brand is said to have positive costomer-based brand equity when costomer react more favorably to a product and the way it is marketed when the brandid identified than when it is not(eg, when it is attributed to a fictitiously named or unnamed version of the broduct).
一个品牌是说有正面的costomer为基础的品牌资产时, costomer反应,以更有利的产品和途径,这是销售时, brandid确定比时,这不是(例如,当它被归于一虚假指名或无名的版本该broduct )。
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The hours passed fitfully ,as I lay awake thinking and praying.
时间过得断断续续,那晚我时醒时睡,当我醒着时就思考和祈祷。
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4Based on a fact that the price formula of Asian options can be transformed into that of vanilla European option when the time to maturity is less than or equal to the length of average, we skillfully obtain the analytical price formula for the option on the minimum or the maximum of two geometric average prices and generalize it to obtain the price formula of several average prices for the first time. We also apply the method of [121], which approximates the arithmetic average by the geometric average, to the pricing of opitons on the minimum or the maximum of two arithmetic average prices to obtain Its approximated price formula. Numerical results show that the approximated price is relatively accurate when the riskless interest rate is large or the option is in the money and the volatility of two underlying assets are high and its accuracy is a little reduced but still good when the dividends are considered. However, it is hardly affected by the sampling number.
我们基于观察到的一个事实即当离到期时间小于或等于平均期间时亚洲期权的价格可变换成普通的欧式期权的价格,从而巧妙地得到了两个几何平均价格的最小或最大值期权价格的解析公式,通过简单地推广,首次得到了多个几何平均时的价格公式;将[121]用于算术平均亚洲期权的定价方法推广到两个算术平均价格的最小或最大值期权,从而得到它的渐进公式,数值结果表明:渐进价格的准确性在无风险利率较大或期权为实值且两标的资产的波动率较小时较好,抽样的个数对它没有影响,但考虑红利时它稍有下降但仍较好。
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Annex, point 3, para Actions under the safeguard provisions in Article 6 of shall not apply to: developing country Members' exports of handloom fabrics of the cottage industry, or hand-made cottage industry products made of such handloom fabrics, or traditional folklore handicraft textile and clothing products, provided that such products are properly certified under arrangements established between the Members concerned.
各会员部长咸认由於乌拉圭回合之结果,部分开发中国家就正常水准之商业性输入可能面临资金上之短期困难,并认此等国家应得在其改革之过程中,依现有体系或另外设立之体系,向国际金融机构获取资源,以因应此等资金上之困难。当适当的检验或防检疫保护水准容许阶段性地引进新的检验或防检疫措施时,对利益攸关的产品,宜给予开发中会员较长的遵循缓冲时程,俾维持其出口机会。产羊毛之开发中国家会员,如其经济及纺织品成衣贸易主要依赖羊毛工业,主要出口项目为羊毛制品,且其纺织品及成衣贸易量於进口会员占相当小之比重,应於订定配额数量、成长率及弹性条款时,就其出口需求,给予特殊考虑
- 推荐网络例句
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I will endeavour to find you some assistance.
我尽力帮你找人帮忙。
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At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.
起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。
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Ah may dee:You are chinese living in a democratic country.
你是居住在民主国家的中国人吧。