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- This article introduces DSP controlled CO 2 welding short-circuit process control system,short-circuit waveform control method and arc waveform control with PI arthmetic,also it gives welding current and voltage waveforms . 介绍了数字信号处理器(DSP)控制CO2焊短路过渡控制系统,DSP软件进行短路波形控制方案和燃弧波形控制的PI算法,给出了软件控制的焊接电流、电压波形。
- Comparing with the welding of surface structure of cab and diesel engine,this article points out the advantage of MAG welding,especially better than CO 2 welding,furthermore,the surface quality of seam is enhanced. 通过试验比较了MAG焊和CO2焊2种方法焊接驾驶室、柴油机等外观件,指出MAG焊具有一系列优点,特别是MAG焊的综合机械性能优于CO2气体保护焊,MAG焊的焊道表面质量有了明显的提高,且MAG焊的总体成本低于CO2焊。
- Some advice for the application and repairing of CO 2 welding works 对CO_2焊接应用与维修工作的几点建议(下)
- Keywords steel for CO 2 welding;workhardening;recrystallization; 气体保护焊丝用钢;加工硬化;退火再结晶;
- During high power CO 2 laser beam welding,the plasma above the keyhole will influence the absorption ratio of the laser energy absorbed by the workpiece. 高功率CO2 激光焊接过程中 ,小孔上方的等离子体会影响激光和工件之间的耦合效率。
- Digital welding machine now becomes more and more popular,it adopts DSP as controlling kernel for triggering the main circuit of the new kind of twelve-phase SCR CO 2 shielded welding machine. 介绍了一种晶闸管弧焊电源用新型无同步变压器的同步控制电路,实现了对自然换相点的精密同步控制,并能跟踪自然换相点的漂移,克服了传统同步控制电路的不足。
- Carbon dioxide , CO 2 is a reaction product when urea is used as the reductant. 二氧化碳，二氧化碳是一种反应产物时尿素用作还原剂。
- The 5mm and 6mm A3 steel plates have been welded by 5kW high power from three-fold resonator TEL CO 2 Laser . The primary factors such as welding power? speed? 采用 5kW三折腔横流CO2 激光器对 5mm、6mm厚的A3钢板进行焊接实验 ,主要研究了焊接功率、速度、离焦量以及侧吹气流量对焊接深度和焊缝宽度的影响 ,并对焊接样品进行金相分析和显微硬度分析
- Photosynthetic rates in leaves were measured with CI-301(CID, Inc) portable CO 2 exchange system. 利用 CI- 30 1 ( CID,Inc) CO2 气体交换系统测定叶片光合速率和通过光合作用相关响应曲线计算光合参数。
- With the progress of CPR, most carbohydrates and aliphatic compounds were oxidized into CO 2 and H 2O. 但大部分的碳水化合物和脂肪族化合物氧化为CO2 和H2 O而损失掉。
- Progress in research of CO 2 activated by plasma and plasma catalysis is summarized. 本文综述了近年来利用等离子体活化及等离子体与催化剂协同活化二氧化碳转化的研究进展。
- On this multiple bed system, CO 2 and CH 4 were mainly adsorbed by AC,and CO by MS. MS主要吸附CO，为复合床层PSA过程的模拟计算和设计提供了基础。
- Fan 124 block in Daluhu oilfield will be a pilot area of CO 2 miscible displacement in Shengli petroliferous province. 大芦湖油田樊124块是胜利油区拟开展二氧化碳混相驱的先导试验区。
- Thus, climatic regions offering the maximum number of clear days, also offer the greatest opportunities for CO 2 injection. 这样，当地气候提供最多的晴天，也给增施CO 2提供量多的机会。
- Therefore t he CO 2 corrosion and the impaction and abrasion of high speed gas flow are the main causes making the grooves be formed and expanded. 因此 ,CO2 腐蚀及高速气流撞击磨蚀是造成沟槽产生和扩展的主要原因。
- Chromatium was cultured and trained in CSTR reactors. The medium was coke oven gas (COG) in which there were NH 3, CO 2 and H 2S. 着色细菌在 CSTR反应器中进行驯化和富集培养 ;培养基为含 H2 S、CO2 和氨态氮的煤气 (其中 H2 S含量为 2 .;0 g/ m3)。
- In sample comparison experiments, the counting result of lactic acid bacteria by CO 2 method was 20 times more than that by aerobic culture method. 在试样的对比实验中 ,CO2 烛缸法的乳酸菌计数结果是国家标准方法的 2 0倍。
- Cu-Co based catalyst for higher alcohol synthesis from CO 2 and H 2 were prepared using coprecipitatioin and characterized through XRD,TPR. 利用共沉淀法制备二氧化碳加氢合成低碳醇的 Cu- Co基催化剂 ,采用 XRD和 TPR等方法对 Cu- Co基催化剂进行物理表征 ,考察制备催化剂时不同加料顺序对其物性的影响 ;
- In terms of the carbon isotope values,it is believed that inorga nic CO 2 exists in well Su5 in Suligemiao and well Lin1, Lin5 in Jingbian. 靖边林 1、林 5井为无机CO2 气 ,陕参 1井为有机CO2 气。
- Materials and Methods: Carbon dioxide digital subtraction angiography (CO 2 DSA) was performed in 16 patients with various disease. 材料方法：对16例患者行二氧化碳数字减影血管造影（CO2－DSA）。
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 农业及相关产业增加值 - the added value of agriculture and related industries
