查询词典 backward difference

To support secure group communications in resource constrained wireless sensor networks, We propose an efficient and scalable key management scheme which only uses symmetric cryptographic algorithms and hashing function. This scheme can achieve forward and backward security.

为了在有限资源的无线传感器网络能安全进行群组通讯，本文只使用对称加密算法和单向哈希函数提出了一种具有有效性和扩充性的组密钥管理方案，并可满足前向和后向安全性。

Her fingers catch the skin on her brother's neck as she hauls him backward by the collar.

她用手指掐住丹尼的后脖子，拽住他的领子往后拉。

Use socialism further primary level is academic, will analyse observation nation region and ethical problem from the respect such as productivity, relations of production, politics, economy, science and technology, education, culture, reached although minority area abolished backward slavery and feudal Helot are made, built socialistic new system, but objective and real decision, ethical region still lies the more inchoate configuration of primary level mixes socialism the conclusion of inferior administrative levels.

并进一步用社会主义初级阶段理论，从生产力、生产关系、政治、经济、科技、教育、文化等方面来分析观察民族地区和民族问题，得出了少数民族地区虽然废除了落后的奴隶制和封建农奴制，建立了社会主义新制度，但是客观实际决定，民族地区仍处在社会主义初级阶段的更加早期形态和较低层次的结论。

The failure and death of Henchard signaled an end to the traditional rural life and the backward mode of production.

Henchard 的失败和死亡标志着传统乡村生活和落后生产方式的终结。

Unlike the previous method, however, the proposed algorithm obtains the new transformed matrix by taking the conjugate operation to the forward and backward spatial smoothing covariance matrix of the received data, so that the modified covariance differencing matrix which is a Hermitian matrix of zero real part can lower the computation load effectively during the eigenvalue decomposition.

不同于以前的算法，提出的算法通过对接收数据的前后向空间平滑协方差矩阵进行共轭运算得到新的变换矩阵，因此修正后的协方差差分矩阵是个实部为零的厄米特矩阵，从而有效地降低了特征分解过程的计算量。

There is also a sentiment for the white man against the black, for a Herrenvolk against the non-Aryans, for "civilized" or "progressive" peoples against "savages" or "backward" peoples.

也有一种白人反对黑人的感情，优待民族反对非雅利安人、"文明"或"进步"民族反对"野蛮"或"落后"民族的感情。

In this paper, based on Delta Operator, signal vectors of Hilbert space are constructed, an input-output model is derived, and both the forward and backward prediction error vectors are described.

摘要本文基于δ算子构造了Hilbert空间中的信号向量，推导了系统的输入输出关系，得出了前向和后向预测误差向量的表达式。

For a while, perhaps one or two years, Cycle 23 and Cycle 24 will actually share the sun, making it a hodgepodge of backward and forward spots.

有一段时间，也许一年或两年，周期23和24周期将真正分享阳光，使它成为一个大杂烩向后和向前点。

In this thesis, we mainly study the homeomorphism flow properties of solutions for SDEs with jumps and backward stochastic differential equations, and also give some applications.

本文我们将上述结果作了以下两方面的推广，一方面是带跳随机微分方程解的同胚流及其应用，另一方面是倒向随机微分方程解的同胚流及其应用。

In order to improve the validity and reliability of the model, the random state of weapon systems after accomplishing the mission at random time is regarded as a random process, and the computing model of the dependability matrix is established by using Kolmogorov backward and forward equations of the continuous time homogeneous Markov chain. The transfer probability is found by solving the matix differential eguation.

为了提高模型的有效性和可信度，将武器系统在执行任务后任意时刻处于某种状态看作是一个随机过程，应用连续时间齐次马尔可夫桩的柯尔莫哥洛夫向前和向后方程建立可信赖度矩阵计算模型，求解矩阵微分方程得到转移概率。

The French are not suggesting a new EU treaty, but they have plenty of other wheezes.

法国人并不是在建议签署一个新的欧盟条约，但他们有许多其他的阴谋。

This letter was written by my brother.

这封信是我弟弟写的。