位置

The head is slowly turned 90° toward the side where nystagmus is induced less intensely. Then the head is rotated 180° rapidly toward the opposite side. This article reports three cases of the ageotropic form of HC-BPPV that were cured by rapid head rotation. The three cases demonstrated that rapid head rotation was an effective maneuver to treat cupulolithiasis on the utricle side. It is recommended that rapid head rotation can be used for therapeutic diagnosis: If nystagmus subsides immediately after this maneuver, the diagnosis is cupulolithias is on utricle side. If nystagmus changes into the geotropic form, the diagnosis is cupulolithiasis on canal side or canalolithiasis in the anterior arm of horizontal semicircular canal. A repositioning maneuver for geotropic form can then be applied to treat these patients.

逆地眼振型水平半规管良性阵发位置性眩晕的3种耳石可能位置如下：水平半规管前臂的管耳石、管侧的顶帽沉石(canal side cupulo-lithias1s)与囊侧的顶帽沉石，本文报告3例以快速转头治疗逆地眼振型水平半规管良性阵发位置性眩晕成功的病例，显示快速转头法对囊侧的顶帽沉石具迅速有效的治疗效果，对於逆地眼振型水平半规管良性阵发位置性眩晕的治疗，作者建议先以快速转头作治疗性诊断，若病人马上复原，诊断为囊侧的顶帽沉石；若眼振转为向地型，则诊断为水平半规管前臂的管耳石或管侧的顶帽沉石，进一步再以向地型的耳石复位法治疗病人。

With regard to the constructions of it-extraposition, the clausal argument (finite clause or nonfinite clause) acting as subject or object is displaced from its normal, canonical position to the right (non-canonical) position, and the original subject or object position is occupied by an expletive it .

就其结构形式而言，充当主语或宾语的分句(限定性时态分句或非限定性不定式分句)从其常规位置被外置到一个非常规位置，通常置于句末位置，而常规的主语或宾语位置则由一个无实质语义内容的虚词 it充当。

Address the characteristics of non-uniform speed transmission, position function control and transmission ratio function control were presented to realize electronic gearbox. The differences between position function curve interpolation and general NC interpolation were analyzed. Considering the effect of uncontrollable continuous principal motion, interpolation slope and position function precompensation interpolation were presented. The relationship among interpolation, servo dynamic response and transmission precision was studied. The coordinate linkage relationship and electronic gearbox scheme in noncirclar gear hobbing were studied.

对电子齿轮箱实现非匀速比传动进行了研究，提出了位置函数控制与传动比函数控制两种非匀速比传动关系的实现方法；对位置函数控制方式，分析了位置函数曲线的插补与普通数控插补方法的区别，提出了插补斜率的概念与位置函数曲线的预补偿插补方法；对非匀速比电子齿轮箱传动精度进行研究，得出了插补精度、伺服系统动态性能指标与传动精度之间的关系；研究了非圆滚齿加工坐标联动的非匀速比传动关系，列出了多种可以满足要求的电子齿轮箱传动方案。4。

Although the accuracy in meterological forecast of tropical cyclones has been distinctly improved, it is still a difficult problem confronting masters and anti-typhoon team leaders of the companies how to steer clear of typhoon reasonably and safely in case that the actual resistance to typhoon is strong enough, the sea area wide enough, and the time permitting ; to avoid unreasonable deviation,anchoring for shelter, blindly rushing onto her path,being involved in storm area,even into the the center of typhoon; under the limitation of the condition of the sea area and time.how to take correct meassures to escape , such as navigating with wind or windward in bias angle, slowing down, anchoring, berthing alongside the warf, mooring to buoy,etc.

传统的解决办法是，将台风中心的预报位置和本船的船位点绘在《台风位置标示图》上，研究本船与台风的相对位置以及相互间动态的发展态势，考虑各种因素的影响并留有充分余地，在小比例尺海图上用几何相对运动标绘的方法作图绘算出本船应采取的避台航向。本文所讨论的就是为迅速和较为精确地解决以上点绘和相对运动标绘的问题，在考虑了各种因素的影响并留有充分余地的情况下，在全方位范围内搜索安全航向，对本船与台风的相对位置以及两者之间的动态发展态势作出预报，并给出船长最关心的、对其作出避台决策至关重要的一组数据和直观图形，帮助使用者及早制订科学合理的避抗预案，及时果断地采取正确有效的避抗措施，解决避台决策的实际问题而设计的一个计算机标绘系统。

To satisfy the operating requirements, between the withdrawable type function units and the switchboard body a mechanical interlock is placed, which only allows a function unit to move when both the main circuit and the auxiliary circuits are cut off.

抽出式功能单元与柜体具有机械联锁装置，使其满足操作要求，只有当主回路和辅助回路全部断开的状态下才能动，机械联锁装置使抽屉具有试验位置，分断位置，连接位置和分离位置。

The players in different positions have different action combinations in the match. The action combination group is made of different action combination. The players, body action in the match is mostly reflected by action combinations.3. The setter has the most average HR among the match in our excellent men volleyball players. The HR is 143 times every minutes; the assistant spikier,s HR is 136.5 times every minutes; the spikier,s HR is 127 times every minutes; the assistant setters HR is 121.5 times every minutes; and the libero,s HR is 136.5 times every minutes.4. There are some questions in the exercise on specialized physical constitution of our men and women volleyball players. The questions are: the principle about the wholly exercise is not clearly bodied; the exercises are not perfectly coincided the position distinguishing; the exercises of specialized physical constitution are not prominent; the content about the exercises of specialized physical constitution is not like the match.5. The excellent volleyball players in different positions have the different demands on the specialized physical constitution.

不同位置运动员在比赛中表现出的动作组合形式不同，不同的动作组合之间相结合又形成了不同的动作组合集，运动员在比赛中的身体活动主要是以动作组合集的形式表现出来的。3我国优秀男子排球运动员，在一场比赛中，二传的平均心率最高，为143次/分；副攻平均心率为136.5次/分；主攻的平均心率为127次/分；接应二传的平均心率为121.5次/分；自由人的平均心率为109.5次/分。4目前我国国家男排和女排运动员专项身体素质训练还存在一些问题，主要体现在四个方面：1、专项身体素质训练整体性原则体现不足2、没有很好地结合排球运动员专项身体素质的位置特征3、专项身体素质训练重点不突出4、专项身体素质训练内容不贴近比赛实际。5不同位置优秀排球运动员对专项身体素质的发展要求不同，或者说排球运动员专项身体素质具有位置特征。

The poison error along disk tangential direction decreases the DPD signal amplitude,and the factor is 1.52T when position error is less than 25%.The radial poison error increases ...

计算结果表明：沿盘片切向的位置误差使DPD的幅值变小，在25%的范围内DPD的幅值随切向位置误差的变化系数为1.52T；沿盘片径向的位置误差使DPD产生直流偏置，在50%的范围内DPD直流偏置随径向位置误差的变化系数为3.8T。

Constitution:the button-sewing machine comprises:a fixing means 构件 for fixing a buttonand an article being sewn;a moving means for moving the fixing means to stitch the button to the article being sewn with seams of a specified sewing pattern; a fixed blade; a moving blade for drawing a thread and then moving to cut the thread by the cooperation with the fixed blade;and a button,wherein the machine has a control means for controlling a fabric transferring means to move the button to a preset position before cutting the thread.

一种钉扣机，设置有布料保持件的可动、固定切换机构，该切换机构在钉扣缝制时可在以下两种状态之间进行切换：将布料保持件固定保持在规定位置上从而停止该布料保持件在左右方向上的移动的状态、或者解除对布料保持件的位置固定从而使该布料保持件通过可动台与纽扣保持件一起在前后方向、左右方向上移动的状态，在该切换机构上安装有可在左右方向上的一定范围内调整布料保持件的固定保持位置的位置调整机构，由此可使整体结构简单，可实现小型化、轻量化及低成本化，且即使在将柔软的布料作为缝制对象时也不会出现缝制褶皱等，另外，无论线的种类和粗细如何，都可进行缝制品质高的钉扣。

Detailed discussion about distribution and changes of the current in every rotor bar and end ring, the relationship between the number of broken-bar and fault features in stator current after broken bar fault appearing was shown.

转子断条位置对电机影响很大，过去没有引起人们的重视，该文对此进行深入研究，分析电机转子断条位置与故障特征量之间的关系，转子断条位置与转子导条电流、转子端环电流之间的关系，并总结出其规律，指出哪些位置导条进一步断裂的可能性较大。

This paper presents several control methods for BLDC motor, and describes their fundamental principles ,advantages and disadvantages in brief. The method of speed-independent function,based on a new flux linkage function,is explained in detail. This method makes it possible to detect the rotor position over a wide speed range from near zero to high speed.

本文介绍了几种无位置传感器无刷直流电动机的转子位置检测方法，并对它们的基本原理，优缺点作了简单的说明，详细地阐述了基于一种新磁链函数之上的与速度无关的位置函数控制方法，利用这种方法从零转速到高转速的宽速度范围内能检测到转子位置。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。