查询词典 twice differentiable function

Preface: The shoulder play an important role in developing the function of the upper limb. Which makes the restoration of shoulder function in brachial plexus injury is vital for the functional restoration of the whole upper limb, and has been considered as one of the function which should be restored firstly;The spinal accessory nerve is one of the most effectively and usually used donor nerves for restoration of shoulder abduction.

引言：肩关节显著扩大了人手在三维空间中的活动范围，并为手部承担负荷提供坚实的支座，是整个上肢活动的基础，肩关节功能对于发挥上肢的作用至关重要，所以臂丛神经损伤后如何恢复肩关节功能是臂丛神经损伤患者整个上肢功能恢复的基础和关键，一直受到广泛的重视与关注，被认为是应优先恢复的关节功能之一；副神经是神经移位治疗臂丛神经损伤恢复肩关节外展功能最常应用的移位动力神经之一。

Structural topology optimization is formulated in terms of the nodal variables on the level set function , which is converted to 0-1 variables by Heaviside function regularized by the sigmoid function.

利用有限元离散后的水平集函数的节点值作为拓扑设计变量来求解连续体拓扑优化问题。

In the optimization iteration, the levelset function values of nodes are considered as design variables. To computedifferences normally, the Heaviside function is handled for smoothing, theregularized Heaviside function is selected to avoid the oscillation inhomogenizations method, and the results can converge smoothly.

在优化迭代过程中，节点上的Level Set函数值被看作是设计变量，并且为了便于微分计算能够正常进行，对Heaviside函数及其导函数做了光滑化处理，选取了一种正则化的Heaviside函数，避免了均匀化方法中出现的振荡现象，可以平稳地收敛到最终结果。

It's a shame, as I think we played a fine game and came close to doubling our advantage at least twice.

我感到非常遗憾，因为我认为我们踢了一场伟大的比赛，我们有两次绝佳的机会，差一点将领先优势翻倍。

A prayer meeting was held in her cottage twice a week, she prayed her self aloud among them, she was a leading member of the sect.

在她的农舍里，一周举行两次祷告会，她在他们中间大声作祈涛，是这个宗教小团体的主要成员。

Twice a week for 10 yuan each with a value meal.

一周两次，10元一个，加在每一次的超值套餐中。

Twice the Abbess bled Robin for his sickness, but it seemed to do him little good, and while he lay there Abbot Hugo of St.

有两次女修道院院长为罗宾的病放血，但是这似乎对他没有什么帮助。

They took one of my ablest jokes and read it over carefully twice and then read it backwards .

他们取了我一篇最有意思的笑话，仔细看了两遍，倒过来又看了一遍。

Because I' d already done this twice last night and both times I'd had to abort.

因为这事我昨晚已经做了两遍，两遍我都失败了。

On the back of your success you've now twice been a presenter at the Academy Awards.

在你不断取得成功的同时，你还两次被邀请担任奥斯卡的颁奖嘉宾。

My father is over 60 years old, and he lifts weights every day.

我爸爸六十多岁了，他每天都练习举重。

Then in a serious tone she declared:"It doesn't pay, dear boy, to look like a ninny with one's wife the first night."

两眼湿润了，她把身子蜷得很小，这样似乎可以更好地闻闻自己。