多周期的

What differ from that of the researchers in the past is the consideration of the direction of Hopf bifurcation with Dirichlet boundary condition , that is, the conditions when the Hopf bifurcation periodic solutions are orbitally asymptotically stable with asymptotic phase.Our basic idea come from the results given by Tang[30]. We adopt the method used by Hassard in the Hopf bifurcation theorem in [24], which is to judge the existence and the direction of Hopf bifurcation, and the stability of the Hopf bifurcation periodic solutions.

与以前的研究者不同的是，本文不仅讨论了在Dirichlet边界条件下系统的Hopf分支在以扩散系数为分支参数的情况下的存在性和分支周期解的空间非齐次性，而且更多的关注了系统在Dirichlet边界条件下Hopf分支解的稳定性及Hopf分支的方向，也即系统定态解在何种条件下，当分支参数如何变化时产生Hopf分支且分支周期解是带渐近位相轨道渐近稳定的。

Based on chapter two, In chapter three, the method of multiple scales is introduced to the study of the multiple-dimensional nonlinear stochastic systems under random external excitation. Using method of multiple scales, we strictly deduce the equation of modulation of amplitude and phase. The effects of random excitations are analyzed; numerical simulations verify the results. Theoretical and numerical simulations show that when the intensity of the random excitation increases, the nontrivial steady state solution may be changed from a limit cycle to a diffused limit cycle.

在第二章基础上，第三章将多尺度法引入到相应的随机系统的研究中；严格推导了系统的约简方程，用矩方法求出稳态解应满足的方程，获得一些结果；并且数值模拟结果与理论推导的结果是一致的；并注意到，与其对应的确定性系统相比较，系统响应从周期解变为近似周期解，系统的相轨线从极限环变为扩大的近似极限环；随着激励带宽的增大，此扩大的近似极限环的宽度将增大。

In chapter three, it assumes that each retailer and distribution center implement periodic review and the same ordering policies, each retailers' demand is independent identical distributed random variables during the different periods, the lead-time is not completely same constants, and the k-fold convolution of the demand distribution functions is closed.

第三章，假设每个零售商和分销中心实行周期盘点，并采用相同的订货策略，多个零售商的需求在不同的周期是相互独立的随机变量，两级分销系统内的交货时间是不全相同的常量，零售商需求的分布函数之k重卷积是封闭的。

With the exception of vaccinations, the maximum number of annual allopathic courses of treatments is 2 resp.

例外情况，每年对抗疗法的次数最多是2次（如用来治疗寄生虫，为3次），如果生长周期小于1年，次数最多1次。

It shows that it is possible to increase the start oscillation length by tailoring magnetic field's amplitude and its period without changing the synchronous condition of the fundamental wave;in the meantime, when there are two or more azimuthally asymmetric space harmonics in the high power broad-band helix TWT, the influences of the Pierce's gain parameter, space charge parameter, and loss parameter on the start oscillation length and real starting asynchronous velocity parameter are also analyzed.

研究结果表明：改变聚焦磁场的幅值或周期来增加起振长度是可能的，而且不会改变基波的互作用条件。与此同时，对起振长度、初始非同步速度参量随皮尔斯增益参量、空间电荷参量、损耗参量等的变化，以及在超宽带行波管中当存在两个或多个角向非对称空间谐波时，起振长度、初始非同步速度参量随周期永久聚焦磁场的变化进行了研究。

Through comparison of energy inputs in corn fuel ethanol life cycle,fossil energy inputs of corn production and ethanol conversion processes were identified as the most important,and therefore nitrogen fertilizer,electivity and diesel used in corn farming and energy consumption of distillation and dehydration process in ethanol production could be known as the most influential factors for the energy benefit of corn fuel ethanol.

但是玉米燃料乙醇从原料的生产、乙醇的转化，一直到被燃耗的整个生命周期中的多个阶段需要直接或间接地消耗矿物能源，因而，虽然玉米燃料乙醇是可再生能源，然而是否具有可持续性及可持续性的大小则取决于其燃耗中所产生的能量与燃料乙醇整个生命周期中所消耗的能量相比是否有盈余及盈余的大小。20世纪70年代中期，玉米燃料乙醇的能量平衡问题研究首次在美国出现[2，3]，当时乙醇替代汽油的能量效益的有关研究指

China Real Estate has been into a "more up more losses, the more up more losses," the vicious circle of the cycle, it can not be extricated.

中国房地产已进入&更多更多的损失，更多更大的损失&的恶性循环周期，就不能摆脱。

The record qualitatively shows that overall U.S. consumer spending tends to be stronger in the early stages of an El Nifio. This may be due partly to, and initially from, less nondiscretionary spending on energy, for example, and more spending on other discretionary items. Moreover, it takes about 912 months for the impact of the warming in the Pacific Ocean (as reflected by the Southern Oscillation Index) to show up as abnormally wet weather over a widespread area of the United States. The sunspot cycle might be another reason for expecting longer-run impacts climate on the economy. Galileo was credited with discovering sunspots around 1610. Ever since that time, there has been a debate, which at times has been intense, on the effect of solar activity on man, weather, agriculture and the whole economy.

可靠的记录显示：全美消费者消费倾向在EI Nifio早期较强劲开始阶段应付部分少数属刚性支出，如能耗更多的支出属可自行选择的内容此外，受太平洋海域升温的影响约持续9-12个月（摘自the Southern Oscillation Index）表现为异常的潮湿天气弥漫美国广泛的地区太阳黑子周期可能是气候对经济更长期影响的另一个原因可以认为Galileo发现太阳黑子周期大约在1610年从那时至今，太阳活动对人天气农业和整个经济的影响一直有争论，有时很激

First, we research and discover the problems of employee's performance evaluation: the contents and standard of results evaluation, principal and period, the appliance of evaluation performance. The standard of performance evaluation isn't unification, overmany evaluation principal and overmuch evaluation period make more difficulties in the process of the evaluation, and the appliance of evaluation result isn't perfect. Then we analysis these problems and give our suggestion,confirm the Key Performance Indicators as the foundation of the evaluation.

首先通过实地调查和研究，发现吉林市烟草公司员工绩效考评的问题，分别从绩效考评的内容和标准、考评主体、绩效考评周期和考评结果应用等几个方面进行分析，发现存在以下一些问题：没有统一的考评标准，考评主体多不便于考核实施，考评周期过于频繁，考评结果应用上力度不够等；在分析的基础上形成咨询建议：确定关键业绩指标考评基础，逐渐形成基于KPI的员工绩效考评方案。

In the morning market, Shanghai stock index opened high with 14 points. Since media gave prediction of falling, significant differences between rising-oriented and falling-oriented have emerged. Strong cashing came as soon as the index upsurged. I don't criticize falling-oriented analysts, instead, we should stick to our own market operation plans. As yesterday's comments by me, the 288 Cycle Line at 3221 points in the morning market would lie in short-term strong supporting position.

早盘，上证股指高开14点，由于媒体上所谓利空的传言及宣传，造成多空双方分歧很大，股指一冲高就出现强力套现潮，我不想批评那些一直唱空的人，我们还是坚持自己的操盘计划，昨天晚上的饿文章已经提示了，位于早盘3221点的288周期线是短期强支撑位，在坚持&三三制进仓法&的原则下，我们等到股指回落到288周期线附近可以满仓操作，在市场处于极度恐慌时，就是我们满仓杀入的机会。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。