Removing partial surfactant covering on nanoparticles reduce the permittivity of particles remarkably , but little effect on the permeability ; decreasing the aliphatic chain length of the surfactant can improve both permittivity and permeability of particles evidently . 2 脱除部分包覆在纳米粒子表面的表面活性剂，可以明显降低铁纳米粒子的介电常数而对磁导率影响不大；减小纳米粒子表面的表面活性剂脂肪链链长使粒子的介电常数和磁导率均有大幅提高。
In this paper emphasis is put on the application of the wavelet technique into the system and the local segmentation problem preliminarily solved existing in the extant bone - age recognition system . . the traditional chain - length concept is dixcarded and the percentage concept of the chain is proposed . no related reports can be found in the literature . the chain is proposed 随后，笔者重点研究了小波技术在微机骨龄诊断系统中的应用，初步解决了目前骨龄系统中存在的局部分割问题，抛弃传统的链长观念，提出了链的百分比概念，国内外文献未见有相关报道；针对分割结果的不封闭性，采用边缘点生长的方法，有效地解决了区域的封闭性。
The transfer would move control of the listed firm to shanghai automotive group co . , a new unit set up at the end of 2004 to pave the way for parent shanghai automotive industry group corp . saic to list overseas or at home in a public offering that could raise as much as us 2 billion in 2005 or beyond . saic , china s top one car maker and gm s main partner in china , set up the new holding firm for its car assets in a revamp ahead of the long - awaited ipo 客车工业是综合现代机械工业和现代先进材料电子工业的资金密集型产业，具有产业链长对相关工业带动力强的特点，扬州有良好的造车基础，有丰富的造车经验，更有一批技术销售人才，把客车工业作为我市经济发展的支柱产业，可以形成产业集聚，对提升我市产业结构，加大经济总量，提高综合竞争力，推动扬州经济新一轮增长将提供持久的动力。
A monte carlo model was developed for simulating the adsorption behaviors of linear macromolecule chains on the solid - liquid interface . the simulations were performed on a simple cubic lattice , which was 50 50 50 sites in size . the concentration profiles of total segments , tails and loops in dilute solutions were used to analyze the influences of simulation parameters ( body concentration , interaction energy between segments , adsorption energy of interface , and macromolecule chain length ) on various adsorption configurations 本文采用montecarlo方法构造了水溶性均聚链状高分子固液界面吸附模型，在50 50 50简单立方格子上模拟研究了高分子稀溶液中链节浓度、链尾和链环分布，并结合真实高分子链的吸附行为，讨论了模拟参数(链节间相互作用能、界面吸附能、体相浓度与链长)对各种吸附构型分布、吸附量、表面覆盖度和附着分数的影响。
The result indicate that spumescence capability of myristyl lycine is strongest , lauryl lycine take second place ; myristyl and cetyl lycine have better washing and decontamination capability , myristyl lycine is best for foam taking dirt ; comparatively speaking , those with longer carbon chain have better action of adding dissolve and decentralization capacity of calcium soap 结果表明：十四烷基甜菜碱的起泡力较强，十二烷基的次之；十四、十六烷基甜菜碱的洗涤力较强，十四烷基的洗涤力更强；相对碳链长的甜菜碱活性剂具有较好的加溶作用和钙皂分散力。
Delay is obvious in large body because of its inertia , moment force , stress and gearing . transfer of electical cell increases the delay . this paper points out that the delay can be compensated by using the smith control algorithm . the result of computer emulation proved that a better quality is gained by using the algorithm on heavy nc machine 大惯量物体，由于其惯性，加之传动链长，所需的扭矩大，引起的应变大，加上电气转换元件的滞后，故滞后效应明显.该文提出用史密斯控制算法将滞后进行补偿.计算机数字仿真结果说明，对大惯量有滞后的重型数控机床，应用该算法能得到较好的控制品质
The urea - formaldehyde ( uf ) polymer / sio2 composite microspheres were prepared by polymerization - induced colloid aggregation ( pica ) method . the formation mechanism of composite microspheres is attributed to the fact that that urea and formaldehyde firstly undergo acid - catalyzed polymerization to form oligomers , and then the sol particles are adsorbed on the chain of oligomers by wan der walls force and hydrogen bonding . when the oligomers reach the critical chain length , they separate from solution due to phase separation 对复合微球形成机理的研究表明，尿素和甲醛在酸性条件下自身聚合可以形成高分子微球，在sio _ 2酸性溶胶中发生聚和反应时，随着反应的进行，齐聚物不断生成， sio _ 2胶体颗粒逐渐吸附在齐聚物分子链上，当聚合物链达到沉淀临界链长时，由于相分离作用，从前驱物溶液中析出，同时sio _ 2胶体颗粒均匀的分布在脲醛聚合物网络中，随之沉淀出来，形成脲醛sio _ 2复合微球。
