查询词典 two step

The relationship of adjacent notes in all the previous scales is a whole-step or half-step.As part of our vocabulary,we need a method to identify the relationship between any two notes.

从前面的音阶看，相邻音之间的关系是一个全音或者半音，而作为我们现在的词汇，我们需要找到一种方法去确认每两个音之间的关系。

Firstly, based on the sliding mode control and backstepping technique, a new attitude tracking controller is derived to control the attitude motion of spacecraft, the stability of the system is analyzed via Lyapunov method and the reaction wheel dynamics is also considered from the real applications point of view. The whole design process is divided into two steps: the first step is to use sliding control technique to design suppositional adaptive variable structure controller; and the second step is to design attitude tracking controller based on SMC and backstepping technique. Numerical simulations are performed to show that both tracking maneuver and vibration suppression can be accomplished effectively.

首先，采用自适应后步法结合主动振动控制技术设计了姿态跟踪鲁棒控制器，基于Lyapunov方法分析了系统的渐近稳定性；在此基础上，显性地考虑了执行机构动态特性问题，将整个设计过程分为两个步骤：第一步采用滑模控制技术设计了变结构虚拟控制器，给出自适应控制律的设计方法；第二步，将后步法与滑模控制技术相结合，设计了姿态跟踪鲁棒控制器，给出飞轮电压的输入算法及稳定性分析；最后，将提出的控制方法应用于挠性航天器的姿态跟踪控制，通过数值仿真对所提方法的可行性与有效性进行分析和验证。

objective to evaluate clinical effect of the handling protaper nickel-titanium rotary instruments in preparation of canals of posterior teeth.methods 96teeth with pulpitis or periapical periodontitis were instrumented by handling protaper rotary instruments using step-down technique,and by k files using step-back technique for control.all teeth were obturated with lateral condensation methods.the efficiency of preparation was analyzed with ra-diographs before and after operation.results no transportation,apical blockage and ledge were found in test.the technique could keep canals smooth.there were two ledge,one instrument fracture and nine transportation in control.the operative time was shorter and post treatment pain seldom occurred in handling protaper group.conclusion the handling protaper niti rotary instruments can prepare the canals effectively and safety.after the preparation,the canals could be easily washed,sterilized and filled.it is an efficient instrumentation method for posterior teeth's canals and be used widely.

目的 评价手用protaper预备后牙根管的临床效果。方法选取患有牙髓炎和根尖周炎的后牙96例，随机分成试验组和对照组各48例，试验组用手用protaper多锥度镍钛旋转器械逐步伸入法预备根管，对照组用k锉，逐步后退法预备根管，两组均用侧向加压充填法充填根管，根据治疗前后的x线片，评价后牙根管预备效果。结果试验组无根管偏移、根尖阻塞、台阶，且根管壁平滑流畅，无器械折断等并发症发生。对照组有2例台阶形成，器械折断1例，根管偏移9例。试验组操作时间短且术后疼痛轻微。结论应用手用protaper预备后牙根管快速、安全，成形效果好，易于根管冲洗消毒及填充，可视为临床上预备后牙根管的有效方法。

Realizes the robot rotary motion using Step Motor machine actuation and the overtone gear drive, uses another tablecloth Step Motor actuation ball bearing guide screw to revolve, thus causes with the ball bearing guide screw nut vice- solid company at the together arm realization the vertical motion, his/her the arm expansion and contraction movement actuates by the hydraulic cylinder, the entire manipulator through two straight lines directions and a hand of rotation, the realization work piece transporting work, this article has carried on the detailed design to manipulator's mechanism.

利用步进电机驱动和谐波齿轮传动来实现机器人的旋转运动，利用另一台步进电机驱动滚珠丝杠旋转，从而使与滚珠丝杠螺母副固连在一起的手臂实现上下运动，其手臂的伸缩运动由液压缸驱动，整个机械手通过两个直线方向和一个旋转方向，实现工件的搬运工作，本文对机械手的机械结构进行了详细的设计。

Realizesthe robot rotary motion using Step Motor machine actuation and theovertone gear drive, uses another tablecloth Step Motor actuationball bearing guide screw to revolve, thus causes with the ballbearing guide screw nut vice- solid company at the together armrealization the vertical motion, his/her the arm expansion andcontraction movement actuates by the hydraulic cylinder, the entiremanipulator through two straight lines directions and a hand ofrotation, the realization work piece transporting work, thisarticle has carried on the detailed design to manipulator'smechanism.

利用步进电机驱动和谐波齿轮传动来实现机器人的旋转运动，利用另一台步进电机驱动滚珠丝杠旋转，从而使与滚珠丝杠螺母副固连在一起的手臂实现上下运动，其手臂的伸缩运动由液压缸驱动，整个机械手通过两个直线方向和一个旋转方向，实现工件的搬运工作，本文对机械手的机械结构进行了详细的设计。

The relations between the potential difference and the discharging time when the discharge current is a step function as well as a step function containing high frequency vibrations, the relations between one-dimensional and two-dimensional spark locations and potential difference based on the thin wall model and the thick wall model have been studied.

仿真研究了放电电流为阶跃函数以及含高频振荡时电位差与放电时间的关系；基于薄壁模型和厚壁模型，仿真研究了电极下表面一维放电点位置和二维放电点位置与电位差的关系；对于确定的电位差，仿真研究了放电点位置的分布情况，说明两点输入不能唯一地检测出放电点位置，从而引入四点输入检测的思想。

When the mobile phase composition on the current step is optimized, the overlapping separation range map for solutes eluted in next one or two steps is replotted simultaneously by considering the influence of elution conditions for current step on the retention of uneluted solutes.

在对当前台阶流动相组成进行优化的同时，考虑其对后面一到两个台阶上流出组分保留的影响，实时地重新绘制对于后面台阶上流出组分的重叠分离区域图。

When the mobile phase composition on the current step is optimized, the overlapping separation range map for solutes eluting on next one or two steps is replotted simultaneously by considering the influence of elution conditions for current step on the retention of uneluted solutes.

在对当前台阶流动相组成进行优化的同时，考虑其对后面一到两个台阶上流出组分保留的影响，实时地重新绘制对于后面台阶上流出组分的重叠分离区域图。

This paper is trying to discuss the rationality and necessity of the existence of administrative approve of the retirement for illness from two points of view and their integration. One is social security system, the other one is administrative approve. However there comes a social problem named "free rider". It means the administrative approve and social security system should be improved step by step.

本文试从社会保障和行政审批两个角度的结合上，讨论病退行政审批存在的合理性和必要性，但在新经济形势下，出现了搭便车行为，它反映出我国的行政审批制度以及病退社会保障还是需要完善的。

The tactics kant settled the dispute isthe way of two — divided, it contains the distinction of two sorts ofpropositions, the distinction of two implications that subject term concerns, the distinction of two principles, the distinction of two characters of subject and the distinction of two propositions of antithetic.

其中包含两类命题的区分、主词的两种含义的区分、两类原则的区分，以及主体的两种性格的区分和两类背反命题的区分。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。