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Spectral methods and the classical Crank-Nicolson scheme are applied to deduce the full discrete system for the continuous model, then the variational adjoint assimilation approach is used to derive the gradient and the corresponding adjoint system.

从这个全离散问题出发，结合全局或局部已知的观测数据，分别构造梯度下降算法求解相应的最优化问题。我们分析了采用不同方法计算梯度所需的代价，另外，还给出一种选择最优迭代步长的算法。

This paper presents a new kind of design principle and a structure scheme of brake shoe adjuster autotestor .

该文给出了一种全新的闸调器试验台的设计原理、结构方案。

A fast handoff scheme based on the administrative domain is proposed to improve the performance of mobile IPv6 applications in wireless LAN environment.

采用了分层移动IPv6(HMIPv6)的移动锚点进行域管理，从而达到了对移动IPv6切换进行优化的目的。

The quantum amplitude amplification is the generalization of quantum Grover search algorithm. In this strategy, the Grover iteration has been replaced by two different quantum amplitude amplification operations. This makes it possible to collapse the system with probability 1, in other words, with certainty. The measurement operation in this scheme is only used to cancel the phase factor. Finally, one can use the admissible control to drive the system from the eigenstate to the target state and the control task is accomplished.

量子幅值放大是Grover迭代思想的一般化，该控制方案中采用两种不同的量子幅值放大操作替换了Grover迭代，使得期望本征态的概率幅的模在经过一定次数的迭代之后精确的等于1，然后借助于测量来消除相位因子，使系统的波函数确定性的塌缩到期望的本征态，最后再借助幺正演化，将系统从本征态控制到目标态，实现期望的控制任务。

In this scheme, the description of unitary evolution and quantum measurement is unified and the quantum control operation is represented by probability state transition. The algorithm works as follows. At first a measurement is applied on the system. If the state after collapse is not the desired eigenstate, then system evolution will go on. After a period of time, the system is measured again. The process will go on like this until we get the desired eigenstate by measurement. Finally the system is driven to the target state with admissible control as before.

4把本征态能控性概念进一步向前发展，提出了概率能控性的概念，将幺正演化和量子测量这两种量子控制手段统一的用概率状态转移来描述，并针对一类特殊的本征态能控的系统，提出了幺正演化和测量交替进行的量子反馈控制策略：如果单步测量所得到的本征态不是期望的本征态，则让系统以这一本征态作为新的初态进行下一步的幺正演化，然后在适当的时候再次测量，让系统塌缩到某一本征态，如此重复进行，直到达到期望的目标态为止。

This will not affect your chance of admission to the Scheme.

这将不会影响你入学的机会。

Based on the development of middle school management, the thesis tries to explore the conception of education management in modern middle school in the hope of providing an adoptable scheme to educational administration.

本文属于基础研究，基于国内外中学管理的发展趋势，着重探索现代中学教育管理的制度，以期为教育行政管理部门提供一个可借鉴的参考方案。

The third chapter has introduced the designing scheme of this system and the adoptive protocol of the system.

第四章主要介绍了在用socket进行网络通信时所采用的三种算法，并详细分析了这三种算法的性能。

British government scheme whereby a person with very little money can have legal representation and advice pay for by the state.

英国政府计划。按此计划，国家为钱很少的人支付法律代理和法律咨询的费用。

The results show that the simulation system is reasonable, reliable and of high precision, and the shallow water control scheme for the aerial torpedo can completely ...

结果表明，该仿真系统结构合理，精度高，可靠性好，所采用的浅水控制方案可使空投鱼雷满足近海防御的使用要求，达到了预期的目的

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。