查询词典 Ac

We should be alert of PE in patients who suffer from acute dyspnoea、 short of breath.A combination of above-mentioned methods may make a fast and ac curate diagnosis of PE.

对以呼吸困难、气短等呼吸系统症状就诊的急诊患者，应提高对PE的警惕，按上述程序进行综合检查，可以快速、准确、实用地对PE做出诊断。

Analytical results indicate that AC magnetic field should be below the penetration magnetic field of superconducting tape and frequency of magnetic field should be low (200Hz)enough in order to reduce the influence of eddy current loss in metal matrix and coupling loss among superconducting filaments and the matrix.

在测量过程中交变磁场必须低于带材穿透磁场；磁场需要保持在低频（200Hz以下）以减少基材的涡流损耗和超导芯间的耦合损耗对测量损耗电压的影响。

There are the giants of the industry, and there are the shops that come and go in ac eer.

有巨人的行业，并有商店示，来来去去在一年内。

The content of Vitamin B_6 in apple,egg,pork and rice were 0.03,0.06,0.10 and 0.17mg/100g respectively.The method is ac...

以本方法测定苹果、鸡蛋、猪肉、大米等不同食物样品的VB_6含量分别为0.03，0.06，0.10，0.17mg／100g，实践证明该方法准确，重复性好，简便，实用。

A novel chaotic model of AC electric arc furnace is introduced, which is useful for power quality study.

提出一种用于电能质量研究的新型交流电弧炉混沌模型。

The control method of maximal power point tracking is adopted, so that the energy of sun or wind is inverted into electrical potential energy efficiently to drive photovoltaic pump. The device contains DC-DC and DC-AC two parts.

该电源可选择太阳能电池阵列、蓄电池或风能发现整流输出直流电压作为输入，通过MPPT控制方法实现最大功率点跟踪，从而高效地将太阳能或风能转化为电能来拖动水泵。

The conductivity of the membrane was measured by AC impedance method ,it was showed that the conductivity of the membrane prepared by electrodeposit method could get up to 10 -2 S/cm,the denseness of the membrane was investigated with a lab made negative pressure system,and it was found that the permeability of the membrane decreased by over 95% in the case of ca 2% phosphate deposit.

采用电化学沉积法和溶胶凝胶法制备了一种磷酸盐无机质子传导膜，交流阻抗法测得电化学沉积法制得的膜的电导率可达 10 -2 S/cm ，负压渗透系统研究膜的密实性表明：在磷酸盐沉积量为 2 %左右时，膜的透过性可降低 95 %以上。

It was carried out successfully to microarc electrodeposit ceramic coatings on the anode and cathode of AZ91D magnesium cast alloy with AC pulse method. The thicknesses, morphologies, composition and micro-structures of the coatings were studied by scanning electron microscopy and X ray diffraction.

利用交流脉冲方法在AZ91D铸造镁合金表面成功实现阴、阳极微弧电沉积陶瓷膜，并使用SEM和xRD等手段对陶瓷膜的厚度、组织形貌、成分、结构和耐蚀性作了相应研究分析。

Beginning from the electromotor common control theory, this paper discuss basic concept of AC motor with vector control.

以电动机统一控制理论为切入点，论述了交流电动机矢量控制基本概念。

Based on AC servomotors, NC Heavy Duty Mechanical Driving is a combination of new and high technology (information technology, auto control, modern electrotechnics, new material, etc.) and traditional mechanical technology.

基于交流伺服电机的数字化重载机械驱动技术，是高新技术(信息技术、自动控制、现代电工、新材料等)与传统的机械技术的结合。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐