查询词典 scheme

basing on optics orthogonal codes,this paper proposes a new design scheme of three-dimension optics orthogonal codes.in this scheme,the optics orthogonal codes can be coded not only in space-domain,in time-domain,but also in frequency-domain.it has good auto-cross relativity properties.the simulation figures show that can enlarge the coeds capacity and improve the optics optical communications system performance.so it will be of interesting in coming high dense communication system.

摘 要：基于光正交码编码技术，提出了一种新型空/时/频三维ooc的设计方案，对光信号在时、频和空域进行编码，该码具有理想的自/互相关特性。通过仿真比较，在容量和系统的误码率等性能方面比一、二维ooc都有较大的提高，因而能很好地适应未来高密集光纤通信。关键词：三维光正交码；光码分多址；误码率；高密集光纤通信

We present a quantum error correction scheme based on quantum cloning. This scheme shows the relationship between quantum cloning and quantum error correction. 4 To avoid decoherence in quantum algorithms, we construct a decoherence-free subspace by using multiple quantum coherences.

该方案一方面说明了量子克隆与量子纠错存在一定程度上的联系，另一方面也反映出一些量子克隆过程本身具有一定的抗消相干的能力。4）提出用二维NMR中的多量子相干实现无消相干子空间，并在实验上验证了该DFS的避错能力。

Consider that processes the factor such as being convenient, the whole frame adopts the stencil plate to press the shaping craft, so as to ensure the whole intensity of the frame; The main body of the frame has continued to use the traditional ladder-shaped structure, of simple structure, stability is good; Assign the scheme wholly according to the electric automobile, has confirmed the physical dimension of the frame; Combine the scheme of decorating of the main spare part of electric automobile, has confirmed the frame is released, the crossbeam one decorates a form and connects the method, install the needing of main spare parts such as the gear box,etc. in because some crossbeams, has taken the structural form of the ingot roof beam.

考虑到加工方便等因素，整个车架采用钢板冲压成型工艺，以保证车架的整体强度；车架主体沿用了传统的梯形结构，结构简单，稳定性好；根据电动汽车整体布置方案，确定了车架的结构尺寸；结合电动汽车主要零部件的布置方案，确定了车架纵、横梁的布置形式及连接方法，部分横梁因为安装变速器等主要零部件的需要，采取了元宝梁的结构形式。

Then, in terms of the proposed tuning scheme and frequency-domain control theory, some decupling control methods are studied for the multivariable processes with time delays. The main contribution lies in: 1 For single-parameter diagonal controllers and full matrix controllers of the multivariable control system, a robust tuning scheme is proposed.

首先，给出了系统面临乘性输入、乘性输出，以及加性不确定性时，保证系统鲁棒稳定性的充分条件，并依据此条件，提出了计算控制参数整定范围的解析方法；然后，给出了参数估计方法，用来在参数整定范围内预测初始控制参数；最后，通过主导极点或幅值率调节方法，进一步优化出满足时域设计指标的控制参数值。

In the scheme the atoms interact simultaneously with a highly detuned cavity field and the cavity is only virtually excited, thus the scheme is insensitive to the cavity decay,and it can be carried out in the experiment.

在这个方案中所有原子同时和大失谐腔场作用，腔场只是被虚激发，因此该方案对腔场的消相干不敏感，而且具备实验可行性。

Considering the theory of roadway support in soft rock, we proposed an active support mode based on study of rheology of weak adjacent rock, complex stress environment, and destabilization of original supports. Fully grouted bolt, extension grouted cable that can strengthen self-bearing capacity and entirety are used. Original support scheme and reinforcement scheme are simulated by means of FLAC(superscript 3D).

在分析硐室围岩岩性、软弱围岩流变、复杂应力环境及原支护结构失稳的基础上，结合软岩巷道围岩控制理论，提出了以全长锚固锚杆、锚索增强围岩整体性和自承载能力的主动支护，并以底板锚注加底拱返修加固。

Online tuning and relatively light calculation burden due to directly coefficient setting by formula extend this scheme to be used for fast-running process and mechanical equipment, numerical simulation over a wide range of system parameter variation shows that the recommended scheme is superior to both traditional PDF designed by Phelans approach and relay feedback auto-tuning PID in terms of performance behavior.

本文通过基于继电反馈的自整定PDF控制和基于Phelan法的PDF控制及基于继电反馈的自整定PID控制的比较研究，表明所提出的控制方法具有良好的控制效果。

Online tuning and relatively light calculation burden due to directly coefficient setting by formula extend this scheme to be used for fast-running process and mechanical equipment, numerical simulation over a wide range of system parameter variation shows that the recommended scheme is superior to both traditional PDF designed by Phelan's approach and relay feedback auto-tuning PID in terms of performance behavior .

大量的数值仿真试验表明，该自整定PDF控制方法具有良好的控制效果和在线调节性能，具有设计公式简单、相对计算量小的特点，能够应用于快速变化的过程和机械设备中。本文通过基于继电反馈的自整定PDF控制和基于Phelan法的PDF控制及基于继电反馈的自整定PID控制的比较研究，表明所提出的控制方法具有良好的控制效果。

In this paper, based on the demand of enterprise, the design theory and method for blocking scheme of clamping fixture are further studied; the difference and similarity of under frame of railway freight wagon on structure and size are analyzed; the design system frame of blocking scheme for freight wagon under frame is constructed; the blocking design method for under frame assembly is generalized.

本文在企业需求的基础上，对夹具模块化方案设计理论和方法进行了深入的研究，大量分析了铁路货车底架组成在结构、尺寸上的差异及相似点，并对与之相对应的组对夹具进行了细致的研讨，构建了货车底架组对夹具模块化方案设计系统框架，总结出底架组对夹具的模块化设计方法。

In this scheme, by means of the sequence secret sharing scheme, the verification participators can divide the signature verifier from the chain grantors, the signature verifier cannot verify the validity of the signature until he is authorized by all chain grantors in turn, and any chain grantor(even all chain grantors are collusive)cannot verify the validity of the signature.

利用有序秘密分享方法将验证参与者分为签名验证者和链式验证授权者，签名验证者只有在经过链式验证授权组中每一个成员的依次授权时，才可以验证签名的有效性，而且链式验证授权组中的任何成员都不能验证签名的有效性。

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％。