油田企业电视产业化经营之管见：参加“全国企业电视产业化经营,网络…

20 0 0年年初 ,中国广播电视学会企业电视研究会、中国电视艺术家协会企业分会在北方冰城哈尔滨召开了“全国企业电视产业化经营 ,网络化发展 ,节目创新高级研讨会”。广东广播电视厅副厅长孙孔华、北京广播学院教授周鸿铎、《南方电视学刊》杂志社副总编朱剑飞、前凤凰卫视节目制作人兼主持人杨澜、香港天地数码公司总载吕品等 7名全国电视界、理论界、宣传部门的著名专家、学者 ,以及来自全国 10 0多家企业台的领导参加了研讨会。这次会议的重点是讨论“中国企业电视如何改革与发展” ,与会的专家学者结合自己从事的工作实践 ,围绕中国企…     

浅谈有线电视网络覆盖范围内用户收看不到增补频道节目的解决方法

几年来,由于邻频传输技术在有线电视系统中迅速发展,增补频道得到了广泛采用,致使早期生产的电视机收不到增补频道节目,影响了用户的正常收视。现从四个方面予以介绍。１为什么采用增补频道传送电视节目（１）有线电视传送节目的电缆损耗随传送距离的增加而增大,同时...     

油田企业电视产业化经营之管见——参加“全国企业电视产业化经营，网络化发展，节目创新高级研讨会”有感

2000年年初，中国广播电视学会企业电视研究会、中国电视艺术家协会企业分会在北方冰城哈尔滨召开了“全国企业电视产业化经营，网络化发展，节目创新高级研讨会”。广东广播电视厅副厅长孙孔华、北京广播学院教授周鸿铎、《南方电视学刊》杂志社副总编朱剑飞、前凤凰卫视节目制作人兼主持人杨澜、香港天地数码公司总载吕品等7名全国电视界、理论界、宣传部门的著名专家、学者，以及来自全国100多家企业台的领导参加了研讨会。 这次会议的重点是讨论“中国企业电视如何改革与发展”，与会的专家学者结合自己从事的工作实践，围绕中国企业电视的产业化经营、企业化管理，站在国际同行业发展的高度，阐述了自己的观点和见解，如何适应市场经济的需要，专家学者对企业电视实行产业化经营这一发展方向达成共识。油田企业电视如何抓住机遇，开拓进取，进行产业化发展呢?笔者就此有感即发。     

浅谈摄录一体机电源故障分析与检修

摄录一体机电源控制电路不论是在性能上还是保护措施上都比录像机复杂,这就要求摄录机在工作中应按照要求有秩序地进行工作,同时电源检知电路能检测到可能发生不正常现象,以便采取相应的保护措施。１工作原理（图１）电池通过摄录一体机后部电池盒再经插座ＰＧ（２）脚...     

Syntheses of Fe-Ni Magnetic Nanoparticles and Their Applications on Biologic Labeling

In this study, we compared FeNi alloy magnetic nanoparticles (MNPs) prepared by either combustion or chemical precipitation methods. We found that the FeNi MNPs generated by combustion method have a rather high saturation magnetization Ms of～180 emu/g and a coercivity field Hc of near zero. However, the alloy nanoparticles are easily aggregated and are not well dispersive such that size distribution of the nanoparticle clusters is wide and clusters are rather big (around 50～700 nm). To prepare a better quality and well dispersed Fe-Ni MNPs, we also developed a thermal reflux chemical precipitation method to synthesize FeNi3 alloy MNPs. The precursor chemicals of Fe(acac)3 and Ni(acac)2 in a molecular ratio 1,2-hexadecandiol and tri-n-octylphosphine oxide (TOPO) were used as reducer and surfactant, respectively. The chemically precipitated FeNi3 MNPs are well dispersed and have well-controlled particle sizes around 10～20 nm with a very narrow size distribution (±1.2 nm). The highly monodispersive FeNi3 MNPs present good uniformity in particle shape and crystallinity on particle surfaces. The MNPs exhibit well soft magnetism with saturation magnetization of ～61 emu/g and Hc～0. The biomedically compatible FeNi MNPs which were coated with biocompatible polyethyleneimine (PEI) polymer were also synthesized. We demonstrated that the PEI coated FeNi MNPs can enter the mammalian cells in vitro and can be used as a magnetic resonance imagine (MRI) contrast agent. The results demonstrated that FeNi MNPs potentially could be applied in the biomedical field. The functionalized magnetic beads with biocompatible polymer coated on MNPs are also completed for biomedical applications.