Based on this we simulate the volatility features of the two kinds of yield rate time series and analyze their fitting results using the stochastic volatility models.
在此基础上利用随机波动类模型对两种收益率的波动性特征进行拟合，并对拟合优度进行分析。
Through the analysis of copper time series' characteristics, we found that copper yield rate time series had peak fat-tail characteristic, volatility clustering characteristic and obvious ARCH effect.
通过对沪铜收益率时间序列特征的分析发现，沪铜收益率时间序列存在尖峰厚尾性和波动集群性，并具有明显的ARCH效应。
Various interventions, such as infection-fighting drugs, can increase a population's average survival time, but only approaches that slow the body's rate of aging will increase the maximum lifespan.
各种干预措施，如抗感染药物，可以增加人口的平均存活时间，但只有那些减缓人体衰老速度的方法才能延长最长寿命。
We wanted to know if the length of time food is in contact with a contaminated surface affected the rate of transfer of bacteria to the food.
我们想知道食物与被污染的表面接触的时间长短是否会影响细菌转移到食物上的速度。
The reason for scheduling against time instead of allocation rate is that allocation is often uneven during an application's execution.
针对时间而不是分配率进行调度的原因是：在应用程序执行期间，分配率通常都是不均匀的。
The supply of oil can be shut off unexpectedly at any time, and in any case, the oil wells will all run dry in thrty years or so at the present rate of use.
石油供应可能会随时意外中断；不管怎样，以目前这种消费速度，只需30年左右，所有的油井都会枯竭。
The effect of combustion conditions on burning-out time and maximum burning rate is researched.
调查了燃烧条件对燃尽时间和最大燃烧速率的影响。
In reality, throughput is affected by a large number of variables including message arrival rate, message processing time, multiprocessing and scheduling, and resource constraints.
实际上，吞吐量受到很多因素的影响，包括消息到达的速度、消息处理时间、多处理和调度、资源约束等。
They then linked each sample with its likely source region and calculated the rate of dust deposition over time.
之后研究人员通过沙尘样本找寻到其对应来源地，并计算这些沙尘随时间积聚的速率。
Finally, lawmaker recommend reducing manpack radio production rate to allow time for vendor to ramp up production.
最后，议员们建议放缓背负无线电的生产速度，为厂商留出时间提高无线电产量。
Astronomers predicted two possibilities: either the universe has been expanding at roughly the same rate throughout time, or that the universe has been slowing in its expansion as it gets older.
天文学家预想了两种可能性：一定时间内，宇宙不是以严格一致的速率膨胀，就是随着它的不断老化而减慢膨胀。
If the seas continue to become less alkaline at the current rate, the time will soon come when reefs will start to lose coral faster through erosion than they gain it through calcification.
如果海洋以现在的速度继续变得碱性更小，那么珊瑚礁将开始通过腐蚀作用，比通过钙化作用得到珊瑚更快地失去它。
Have fluids on you rather than depending on water fountains. You can hydrate at a specific rate (time) and better control the amount of fluids you are consuming.
让身体保持水分充足是比依靠饮水机更好的方法。例如可以让自己在特定的时间补充水分并控制好身体消耗水分的量。
You can hydrate at a specific rate (time) and better control the amount of fluids you are consuming.
例如可以让自己在特定的时间补充水分并控制好身体消耗水分的量。
That means we lose a lot of information soon after it goes in, then, over time, the rate of forgetting slows down.
这意味着在最初的几天我们遗忘的速度是最快的也会忘掉大部分信息，而随着时间迁移，我们遗忘的速度就渐趋平缓了。
Pixel response time: Similar to refresh rate, pixel response time is the number of milliseconds the individual pixels take to react to a refreshed image.
像素响应时间：类似于刷新率，像素响应时间指的是像素刷新时的响应时间。
The interest rate has units of time, so I have to specify a time period over which I'm measuring an interest rate.
所以，你得为这段时间贴现，除以(1+r)，才是1美元期价的当前值，在这儿我假设的是1年，实际上不必是1年，利率有时间的单位，所以我指定一个时间周期来衡量利率。
With the unemployment rate at an all time high, most people are thanking their lucky stars to be employed.
在失业率大多数有史以来的最高的今天，大多数人正在因为被聘用而感谢他们的幸运星。
At the time, the cure rate for ulcers with any other treatment would have been one out of 11.
当时，溃疡的治愈率在使用任何其他疗法的情况下都应该是11分之1。
Would not a causal analysis on how to reduce the fix-time rate be more beneficial to the team's overall efficiency, in terms of reducing wait time, than tallying how often a build fails?
就减少等待时间而言，对如何减少确定时间率的因果分析不会比计算构建失败的频率的数字更有益于团队的整个效率吗？
In an emerging economy with rapid productivity growth the real exchange rate should rise over time, through either higher inflation or a rise in the nominal exchange rate.
在一个生产率迅速增长的新兴经济体国内，其实际汇率也会随着时间的推移而上升，方式则可能要么通过高通货膨胀率，要么就是名义汇率的上升。
If you bump into patrollers at the right rate, it's time to go foraging. If not, better wait.
如果接触的是巡逻工正确的频率，就可以外出；而如果频率不对，则最好再等等。
But the difference between the rate and rates on U.S. federal-funds target rate remains near all-time highs.
但该利率与美国联邦基金目标利率之间的息差仍位于历史高点附近。
The CDC study did not explore why the teen birth rate is at an all-time low.
疾病控制中心的研究并没有探究出为什么青少年出生率总是处于低比率状态。
By about 2020, the global fertility rate will dip below the global replacement rate for the first time.
到2020年左右，全球生育率将第一次低于全球生育等值替换水平。
By about 2020, the global fertility rate will dip below the global replacement rate for the first time.
到2020年左右，全球生育率将第一次低于全球生育等值替换水平。
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