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Based on the elastic theory of large deflection and by taking into account the variation of the axial force and its effects on bending deformation of the drillstring in vertical section,the vibration of the drillstring induced by fluctuating weight-on-bit is described by a parametrically excited system.A Mathieu equation describing the system is established by Galerkin Method.By extending the solution into a Fourier series,the curves of dynamic bifurcation values and the dynamically unstable regions surrounded by the curves are presented.

基于弹性大变形理论，考虑到轴力沿钻柱轴线的变化及其对钻柱弯曲变形的影响等因素，将受自重作用的铅垂井段钻柱在波动钻压激励下的振动转化为一个参数激励系统，用Galerkin方法首次得到了描述此系统的Mathieu方程，并通过将方程的解展成富里叶级数的方法，得到了该振动系统的动力分岔值曲线及其所包围的动力不稳定区。

The computational complexity has been reduced about 5 times over against the original one. Moreover, the interpolation and quantization processing of CW is more reasonable; 2. A secondary power normalization algorithm is proposed in this dissertation. This normalization algorithm ensures that the energy sum of SEW and REW is 1. So, the energy ratio of SEW and REW can be achieved only by using SEW energy. This ratio is applied in REW quantization and CW composition; 3. For more efficient quantization for Slowly Evolving Waveform magnitude, Rapidly Evolving Waveform magnitude and power parameters, firstly, by applying the Equivalent Rectangular Bandwidth theory, classifiable multi-codebooks method, analysis-by-synthesis approach and so on, a predictive AbS multi-codebooks SEW magnitude quantization scheme is proposed. In the scheme, pitch information is exploited to determine which codebook is searched; secondly, for REW magnitude quantization, this dissertation proposed a DCT-matrix multi-codebooks quantization scheme. The classification in muti-codebooks is based on pitch and quantized SEW power. The multi-codebooks structure may offer more the information in quantization and solve the problem of the bit requirement limits in quantization by consuming some extra storage space; Furthermore, for the switch quantization of CW gain, a new classified parameter is proposed.

本文的主要贡献体现为如下几方面：一、为了减少WI模型的计算复杂度，提出了基于快速傅立叶变换、三次B样条插值和周期延拓技术的特征波形(Characteristic Waveform，CW)表示和对齐的快速算法，与原方法相比，计算量下降到原方法的1/5，同时也使得CW在插值和量化时更合理；二、为了严格保证SEW与REW的能量和为1，提出了一种特征波形的二次功率归一化算法，仅需要SEW能量就可以算出二者的能量比，并可应用到后续的REW的分类量化和CW合成中；三、为了对慢渐变波形(Slowly Evolving Waveform，SEW)幅度、快渐变波形(Rapidly Evolving Waveform，REW)幅度和特征波形功率进行有效量化，本文首先采用临界频带理论、分析合成技术、感觉加权技术以及预测式矢量量化技术，提出了一种基于基音周期分类的SEW分析合成预测式多码书量化方法；其次，本文根据基音和量化后SEW的功率信息对REW幅度进行分类，提出了一种基于离散余弦变换的REW矩阵多码书量化方法。

This kind of quartz stone cutting tool is a technological innovation product, the design structure is novel, it change the use of sole grade grinding compound which is already a traditional manufacture method, it simultaneously used the rough and fine grain grinding compound in the cutting tool different part, ie, by the electricity chromium welded skill, weld the large grain diamond grinding compound on the tool bit top (4050 #) and weld the tool bit both sides the metal polish fine grain grinding compound which the nominal grade value is one level up smaller than large grain grinding compound 100-120

这种石材切具属一项技术创新产品，设计结构新颖，这在于它改变了使用单一粒级磨料的传统制作方法，而是在切具刀头不同部位同时使用粗细粒磨料，也就是在刀头顶面和刀头两侧由电铬焊合艺分别同定粗粒金刚石磨料(4050目)和标称粒级值小于粗粒磨料一级以上的金属抛光用细粒磨料100-120目

This kind of stone cutting tool is a technological innovation product, the design structure is novel, it change the use of sole grade grinding compound which is already a traditional manufacture method, it simultaneously used the rough and fine grain grinding compound in the cutting tool different part, ie, granite tile by the electricity chromium welded skill, weld the large grain diamond grinding compound on the tool bit top (4050 #) and weld the tool bit both sides the metal polish fine grain grinding compound which the nominal grade value is one level up smaller than large grain grinding compound 100-120

这种石材切具属一项技术创新产品，设计结构新颖，这在于它改变了使用单一粒级磨料的传统制作方法，而是在切具刀头不同部位同时使用粗细粒磨料，也就是在刀头顶面和刀头两侧由电铬焊合艺分别同定粗粒金刚石磨料(4050目)和标称粒级值小于粗粒磨料一级以上的金属抛光用细粒磨料100-120目

In this paper, a simple method and procedure is given by which cone radius, journal angle, diameter and leg datum point size of a rock bit can be calculated respectively according to geometric relations of rock bit structure parameters.

本文给出一种根据牙轮钻头结构参数间的几何关系分别计算牙轮半径，牙爪轴倾角，牙掌基准尺寸，牙轮背锥角和钻头直径的方法及程序。

A USB frame's end, called EOP (end-of-packet), is indicated by the transmitter driving 2 bit times of SE0 (D+ and D- both below max) and 1 bit time of J state.

一个USB帧的目的，要求业，是所显示的发射机驾驶2位次SE0 （丁+和D -都低于最大值）和1位时间的J状态。

An algorithm how to compress codebook by rotating codewords is also proposed and verified in this paper,a codebook can be compressed from 1 024×16×8 bit to 256×16×8 bit using this algorithm.

同时给出了一种将现有1 024阶16维码书旋转压缩成256阶16维的方法，并对该方法得到的码书性能进行了仿真验证。

Now the sandy-haired man, struck by gabriel's bit ter, astounded face, bit his laughter off, and said:"What's the matter, son?"

这时，长着沙色头发的人被加布里埃尔痛苦和震惊的脸怔住了，他立刻收起笑容，说：&怎么啦，孩子？&

The analyses of the relationship between drilling parameter and rate of penetration was done,and the principle of coupled driven drilling by improving rotary speed of bit was revealed to increase bit rock-breaking energy to improve penetration rate.

分析了钻井参数与钻速的关系，揭示了复合钻井通过提高钻头转速，从而增加钻头破岩能量来提高机械钻速的机理；在分析井斜原因和钟摆钻具防斜打直原理的基础上，分析了直螺杆钻具和弯外壳螺杆钻具组合的防斜机理以及两者的联系与区别，指出在地层倾角较小时采用直螺杆钻具组合，地层倾角较大时采用弯外壳螺杆钻具组合，以达到防斜打快的目的。

The invention relates to a node marking method in a wireless Mesh network, including that a first node transmits connection request information; a second node returns to connection response information or selects an undistributed correlation sign to mark the connection relation and return to one connection response information; the first node judges whether the correlation sign is conflicted with a distributed correlation sign or not, if yes, then retransmitting is carried out; the first node or the second node transmits information to a correspondent node; the correspondent node searches a corresponding transmitting node from a local record according to the analyzed MAC address and searches a Mesh node mark; by judging according to the mark, if no bit position is corresponding to the Mesh node mark or the corresponding bit position is set as 'no', which means that no data is transmitted to the correspondent node; otherwise, data is transmitted to the correspondent node.

本发明涉及无线Mesh网络中的节点标识方法，包括第一节点发送连接请求消息；第二节点返回连接响应消息，或者选择一个未分配的关联标志来标识连接关系，返回一个连接响应消息，第一节点判断关联标志与已分配的关联标志是否冲突，如是则重新发送；第一或第二节点向对端节点发送消息；对端节点根据解析出的MAC地址从本地记录中查找对应的发送节点，并查找Mesh节点标识；根据标识进行判断，若没有与Mesh节点标识对应的比特位或对应的比特位设置为&否&，则表示没有要发送给对端节点的数据；否则表示有。

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％。