查询词典 channel iron

Is a research, development, production and sales of integrated enterprise, mainly produces high-speed road crash barrier, the ball ink on water pipes, ductile iron pipe, centrifugal ductile iron pipe, ductile iron manhole covers, cast iron spilled water pipes, cast iron pipes, cast iron-cast copper-wing-style cast aluminum alloy radiator, cast iron railings fence, green railing, artistic doors, anti-theft, sewage wells, hoods,箅子, flexible pipe fittings and other products, can also be synchronized in accordance with the requirements of the customers design, drawings and samples custom processing.

连云港光明铸业有限公司，是集研制、开发、生产、销售于一体的综合性企业，主要生产高速路防撞护栏、球墨上水管、球墨铸铁管、离心球墨铸铁管、球墨铸铁井盖、铸铁泻水管、铸铁排水管、灰铸铁铸式铸翼式铜铝合金散热器、铸铁围墙栏杆、绿化栏杆、艺术大门、防盗、污水井、盖、箅子、柔性管件等系列产品，还可根据用户需要进行花样设计、来图来样加工定做。

Baoshan Iron and Steel Company Ltd., Benxi Iron and Steel, Anshan Iron and Steel, Handan Iron and Steel, Maanshan Iron and Steel, Tangshan Iron and Steel production of various specifications of cold-rolled plates and cold-roll can be a long-term futures agents.

公司主营宝钢、本钢、鞍钢、邯钢、马钢、唐钢生产的各种规格冷轧板及冷轧卷，可长期代理期货。

These compounds are of substantial interest both inviewpoints of theory and practical applications, mainlyunder the stimulus to achieve synthetic models either foractive sites of iron-sulfur proteins or for transitionmetal catalysts. This thesis describes the synthesis, structures andconformations of 51 new iron-sulfur cluster complexes,which have been characterized by elemental analysis andstandard spectroscopic methods. In addition, single-crystalX-ray diffraction analyses were performed for 4 representa-tive new compounds. Reactivities of μ-〓 with mono- and di- Grig-nard reagents derived intermediates toward various organicelectrophilic substrates were studied, along with complexa-tion of arynyl-containing iron-sulfur clusters by 〓Thus, several bridged, non-bridged, monomeric, dimeric,homonuclear, heteronuclear iron-sullfur and iron-sulfur co-balt-carbon cluster complexes were synthesized. A novelreaction and convenient route for the synthesis in highyield of tetranuclear iron complexes 〓 containing atetracoordinated sulfur atom was discovered, whereas aplausible mechanism based on experimental results was propo-sed for the formation of the new cluster type.

鉴于有机铁硫原子簇化学在基础理论发展和应用方面的重要意义，因此我们开展了这一课题的研究，并取得以下主要成果： 1、本文共合成了51个新有机铁硫及含钴碳簇基的有机铁硫原子簇配合物，除用元素分析，NMR，IR，MS法表征其结构和构象外，还用X-光衍射技术测得四个代表性配合物的单晶结构和构象； 2、我们业已发现炔基Grignard试剂同〓可形成一种&开环&与&闭环&中间物的平衡混合物，研究该平衡混合物同各种亲电试剂的反应； 3、研究发现了一种可高产率地形成〓含〓四配位硫挛合簇的新化学反应并对此反应提出了—种有趣的反应机理； 4、首次由1，4-二溴丁烷双Grignard试剂与〓制得一种新型铁硫簇双硫阴离子活性中间体，并进而研究了它的亲核反应性能； 5、找到了通过〓的光化学反应来合成簇合物〓-〓的一条有实用价值的新路线。

Iron oxide pigment is a color pigment which its basic substance is the oxide of iron, such as red iron oxide、black iron oxide、yellow iron oxide and brown iron oxide and etc.

氧化铁颜料主要指基本物质为铁的氧化物的氧化铁红、铁黄、铁黑、铁棕等着色颜料。

Results: The main iron agents were taken orally in the hospital and some of them were imported. In oral iron agents, polysaccharide iron complex and ferric ammonium citrate were used more frequent, and ferrous succinate was the first choice of treatment of iron deficiency anemia. The iron dextran was used only in the iron agents for injection.

结果显示，我院铁制剂利用以口服铁剂为主，其中部分为进口铁剂；口服铁剂中，多糖铁复合物胶囊、枸橼酸铁铵片应用较多，琥珀酸亚铁片作为预防和治疗缺铁性贫血的首选药物；注射铁剂中，右旋糖酐铁注射液应用较多。

At first, the principle of synthesis of iron oxide pigments including iron oxide yellow、iron oxide red and iron oxide black are explored. The conditions of synthesis of iron oxide pigments, such as concentration of iron sulfate 、value of pH、temperature、amount of air and dispersion tent of air in tank are investigated and optimized.

通过实验，总结和探讨了湿法合成氧化铁颜料—氧化铁黄、铁红和铁黑的基本规律，并对它们的合成条件，如硫酸亚铁浓度、pH值、温度、通气量、气体分散程度等因素进行了比较与分析。

Such as die-casting machine and injection molding machine castings ductile iron QT500-7, round drum Ductile Iron Casting QT450-10, hydraulic cylinder block castings ductile iron QT600-3, tire mold castings ductile iron QT700-2, Motor Block HT250 castings, machinery parts HT200 castings, heat-resistant cast iron pot and a variety of forceps iron castings, such as grades.

如压铸机和注塑机球铁铸件QT500-7，轮鼓球铁铸件QT450-10，液压缸体球铁铸件QT600-3，轮胎模具球铁铸件QT700-2，电机座HT250铸件，机械配件HT200铸件，耐热铸铁钳锅和各种牌号铁铸件等。

First, the S-CDMA-HFC system with integrated traffic is introduced and the method of traffic integration is given. Second, the upstream channel capacity of the S-CDMA-HFC system with integrated traffic that has the same rate is analyzed. The chronoff limit and Gaussian approximate equation of the upstream channel cutoff probability are derived. Third, the impact of the selection of the line transmission rate on the upstream channel capacity of the S-CDMA-HFC system with integrated traffic is discussed in detail. The cutoff probability and throughout equations of the upstream channel with different integrated traffic are derived. Fourth, the impact of the power control error on the capacity is discussed. Results show that the power control error will degrade the upstream channel capacity and have different influence on the different traffic. Finally, the capacity requirement of the initialization process is raised. Analytical results show that the initialization process will impact on the capacity slightly.

首先，简单介绍了综合业务S-CDMA-HFC系统，给出了业务综合的方法；然后，分析了具有相同码率的综合业务条件下的S-CDMA-HFC系统上行信道容量，导出上行信道中断概率的切尔诺夫上限和高斯近似公式；然后，详细讨论了基本传输速率的选择对综合业务S-CDMA-HFC系统上行信道容量的影响，导出了不同业务综合条件下上行信道的中断概率和吞吐量公式；然后，讨论了功率控制误差对综合业务S-CDMA-HFC系统上行信道容量的影响，结果表明功率控制误差会使上行信道容量下降，且对不同业务的影响程度是不同的；最后给出了初始接入的容量要求，分析结果表明初始接入将对综合业务S-CDMA-HFC系统上行容量带来影响，但不明显。

The co-channel interference canceler includes: an NTSC interference rejection filter for removing co-channel interference from an input signal; a noise reducer for reducing noise by removing interference other than co-channel interference from the input signal; and a selection controller for determining whether or not co-channel interference exists in the signal output from the noise-reducer and selecting the NRF when such co-channel interference exists in the noise reduced signal.

该共用频道干扰抵消器包括：一个NTSC干扰抵消滤波器用于从输入信号中消除共用频道干扰；一噪声消减器用于从输入信号中消减共用频道干扰外的其它干扰；和一选择控制器用于产生一选择信号，用以通过确定来自噪声消减器的信号输出中是否存在共用频道干扰来选择NRF。

a scheme of channel estimation using cyclic prefix based on the measurement of the low-voltage power line channel model is presented.after obtaining the frequency response of pilot sub-channel under the state of comb-type pilot,the data sub-channel response is obtained by interpolating the frequency response in frequency direction.in the pilot-free data period,the estimation of the channel is carried out by using cyclic prefix in order to improve the performance of system error rate.

摘 要：通过实际测量给出低压电力线的信道模型，在此基础之上提出了利用循环前缀对信道进行估计的方法，即在梳状导频模式时，使用导频获得导频子信道频率响应后，对其在频域方向进行插值得到数据子信道响应，在其后没有导频的序列的数据周期内，使用循环前缀对信道进行估计，从而起到改善系统误比特性能的目的。

Green function defined inphase space differs from one in coordinate space by its struc-ture which exhibits nonlocatity in coordinates and oscillatorybehavior with respect to momenta.

在相空间中定义的Green函数不同于通常坐标空间的Green函数，在结构上显示出对坐标的高度非局域性，而对动量则显示出振荡行为。

The upper front part of a saddle;a saddlebow.

前鞍桥马鞍前面的上部分；前鞍桥