| 1. | Progress in direct conversion of methane
甲烷直接转化研究进展 |
| 2. | New progress in study of methane direct conversion and syngas technology
甲烷直接转化及制合成气研究新进展 |
| 3. | Recent progress in photo - stimulated direct conversion of methane to methanol
光促甲烷直接转化为甲醇的研究进展 |
| 4. | Over the past years , solid oxide fuel cells ( sofcs ) whose merits are clean , efficient and environmental - friendly , have attracted great attention for their use in the direct conversion of chemical energy into electrical energy through electrochemical reaction
固体氧化物燃料电池( sofc )是通过电化学反应,将燃料中的化学能直接转化为电能的发电装置。它具有清洁、高效、环境友好等诸多优点,近些年来备受关注。 |
| 5. | According to the space vector modulation method of the equivalent structure of the ac - dc - ac transformation , the transformation relations of the matrix converter are deeply investigated . the ac - ac direct conversion control and the double - space - vector pwm scheme of the matrix converter are deduced , the four - step current commutation strategy of matrix converter is expatiated , the design method of input filter and over voltage protection circuit is analyzed , and the modeling and simulation of a three - phase matrix converter are implemented
从等效交-直-交变换的空间矢量调制方法出发，深入分析了矩阵式变频器的变换关系，导出了交-交直接变换控制规律和双空间矢量脉宽调制技术，阐述了矩阵式变频器的换流控制策略，分析了输入滤波器和过电压保护电路的设计方法，实现了矩阵式变频器的建模和运行分析。 |
| 6. | Matrix converter ( mc ) is a power converter based on ac - ac direct conversion . more and more attention is paid to mc depending on its adventages , such as omitting the dc part , obtaining unit power factor , getting sinusoidal input currents and output voltages and easy to realize bidirectional flow of energy
矩阵变换器作为交交直接变换的功率变换器,以其无中间直流环节、具有单位输入功率因数和良好的正弦输入电流、易于实现能量双向流动等优点受到了国内外学者的广泛关注。 |
| 7. | The valid xml document has been bound to c + + structure with a new method of the structure - like space that is created from the base of the xml schema describing structure . the direct conversion between structure object and the xml document through calling the general interface functions of marshal ling and unmarshalling in c + + program
那么，在c + +中，只要从xml模式描述结构的基础出发，产生结构的xml模式表示，同时吸取了dom和sax表示xml数据的优点，运用类结构空间的新方法，我们实现了把有效的xml文档绑定到结构。 |
| 8. | Our focus and our direction is to become the most customer - friendly , low cost provider of high quality copper and copper alloy products while generating an above average return on investment for our owners . oxygen - free high conductivity copper is produced by the direct conversion of selected refined cathodes and castings under carefully controlled conditions to prevent any contamination of the pure oxygen - free metal during processing . the method of producing ofhc
江铜铜材有限公司可以生产各类品种规格的铜及铜合金产品，公司的主导产品-无氧银铜合金材料和银铜合金异型排，广泛应用于家电汽摩配电动工具等产品的各种电机换向器，该产品生产历史悠久，技术先进，质量可靠，深得用户好评，市场占有率在国内名列前茅，并逐年上升。 |
