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The working principle of a novel short st roke linear DC motor wit h permanent magnet s is presented. Mixed digital - analog cont rol approach based on DSP ( TMS320L F2407A) is proposed. Displacement detecting and cont rol technique are discussed. Displacement detecting circuit s , digital - to - analog converter (DAC7641) expanded circuit s and cont rol software are given.

阐述了一种新研制的短行程永磁直流直线电机的工作原理，提出了基于DSP ( TMS320L F2407A)的短行程直流直线电机数、模混合伺服控制系统方案，重点对直线电机的位置检测及控制技术进行了研究，给出了DSP 控制器的位置检测接口电路、16 位双极性数模转换器(DAC7641)的扩展电路和控制软件的实现方法。

Scape usually longer than leaves, with 2-3 flowers each with 1bract, floral bract hooded, broad-ovate, as long as ovary, blunt and usually 3-lobed at apex; flower green-yellow, dorsal sepal white with yellow-green veins and green base, elliptic, 4-4.5cm long, short-pointed at apex, keeled on back, pubescent at base inside, petals very long, pendulous, twist, linear, 8.5-12cm long,6mm wide in middle; lip reversed helmet-shaped, longer than dorsal sepal, with claw almost as long as hood, side lobes inflexed, auricles large and nearly broad-triangular; staminode obcordate; stamens with thick and short filaments; ovary rostrate, 5.5cm long, glabrous.

花茎常长于叶，具2~3朵花，每花具一枚苞片，花苞片兜状，宽卵形，和子房等长，顶端钝而常3浅裂；花绿黄色，重萼片白色而有黄绿色的脉和绿色的基部，椭圆形，长4~5.5cm ，短尖，背面具龙骨状突起，基部内侧被短柔毛；花瓣极长，悬垂，扭曲，条形，长8.2~12cm ，中部宽约6mm ；唇瓣倒盔状较中萼片长，具爪，爪几乎和兜等长，具内折侧裂片，耳大而近阔三角形；退化雄蕊倒心形，上面基部具一个角状突起；雄蕊具短粗的花丝；子房具喙，长约5.5cm ，无毛。

Long branch is rufous, show "" the glyph bends, smooth, have stipular thorn or not apparent; Short branch is born in the each other on the long branch of biennial above; Fall off sexual rod is finer, without bud, bunch is born on short branch, after autumn and foliaceous all fall.

长枝红褐色，呈&之&字形弯曲，光滑，有托叶刺或不明显；短枝在二年生以上的长枝上互生；脱落性小枝较纤细，无芽，簇生于短枝上，秋后与叶俱落。

Leaves deciduous; petiole 3-4 cm, nearly glabrous; leaf blade ovate or ovate-oblong, 9-13 × ca. 8 cm, papery, abaxially densely rufous pubescent on veins, adaxially glabrous, base subcordate, margin doubly serrulate with adpressed acute teeth, 3-lobed; middle lobes triangular-ovate, apex acuminate; lateral lobes in upper part of blade, much shorter and apex acute.

叶脱落 叶柄3-4厘米，近无毛；叶片卵形的或卵状长圆形， 9-13 *长约8厘米，纸质，密被红棕色短柔毛在脉上，正面无毛，基部近心形，边缘重细锯齿具紧贴锐尖齿，3裂；三角状心形的中间裂片，先端渐尖；叶片的侧的裂片在上半部分，很多短和先端锐尖。

In this paper are introduced the technical measures and processing arrangement in spinning Indian and African cotton with the focus on the strengthening of impurities and short fiber removing in scutching and carding processes to raise the formed yarn quality.

印度棉、非洲棉与国产棉相比短绒率高，含杂率高。文章介绍了使用印度棉、非洲棉采取的工艺技术措施及工艺配置，着重在清梳工序加强对杂质和短绒的排除，提高了成纱质量。

There were 10 seismometric stations （ including telemetric stations ） and 13 precursor monitoring stations with 17 observation items within the distance of 300 km from the epicenters. There were 18 medium term, short term and imminent anomalies. 7 of them were anomalies in seismic activity and 11 items were precursory anomalies. The proportion of precursory anomalies within the distance of 200 km from the epicenters was 73%.

在1994年度青海省震情研究报告中，根据青海东部存在的地震活动性异常和部分前兆观测异常，将共和地区列为应注意地区2）。2月16日5.8级地震前，根据地震前兆的短临异常，青海省地震局于2月12日填报了短临预报卡片（除共和地区外，同时还圈定了两个地区），并电话通知了共和县塘格木农场，14日向省政府做了汇报，省政府根据震情的发展用电报通知了海南州政府3）。

Current year branchlets white pubescent; leaf blade 5-14 cm; sepals outside glabrous or sparsely pubescent, inside densely sericeous.

当年小枝白色短柔毛；叶片5-14厘米；萼片外面无毛或疏生短柔毛，里面密被被绢毛。 21 C。 sinensis 茶

Petioles short, 0.8–2.5 cm; leaf blade small, 0.7–1.3 × 0.8–1.6 cm, adaxially setulose, abaxially pubescent or hispid.

叶柄短，0.8-2.5厘米；叶片小， 0.7-1.3 * 0.8-1.6 厘米，正面具小刚毛，背面具短柔毛或具糙硬毛。

Culm sheaths variable in color, densely glaucous, sparsely setose, nearly glabrous on small culms or at culm apex, margins ciliate; auricles falcate, small; oral setae radiate, 4–6 mm; ligule prominent, short, ciliolate; blade green, triangular, lanceolate, or narrowly lanceolate, setulose.

在颜色，密被白霜，稀疏刚毛里易变，在小的秆上近无毛或者在秆顶，边缘具缘毛的竿箨；叶耳镰刀形，小；口头的刚毛散发出，4-6毫米；叶舌突出，短，具短缘毛；给绿色装叶片，三角形，披针形，狭披针形的或，。

The shortest slubby length is 2cm and the longest is arbitrary.

最短节长能纺2cm，最长任意，最短间距2cm，最长任意，最大粗度为6倍。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。