基于准RTK的GBAS机载定位精度性能研究

摘要：地基增强系统(ground-based augmentation systems,GBAS)中机载导航定位精度和精度可靠性关系到飞机和人员的生命财产安全。因此,提出了在GBAS中使用以准载波相位差分技术（Real - time kinematic,RTK）为差分方式减小潜在误差影响的方法。RTK利用了参考站和移动站之间观测误差的空间相关性,通过差分的方式消除了移动站观测数据中的大部分误差,与传统的差分方式相比,RTK具有更大的技术优势。通过实验验证和数据仿真结果表明：该方案的单频准RTK可实现分米级甚至厘米的高精度定位,能够为飞机的进近提供精密和稳定的导航数据,同时为机场实现GBAS CAT II/III类精密进近服务起到积极地促进作用。     

N，N’—双（2—氨乙基）草酰胺合铜（Ⅱ）配合物的非等温热分解动力学研究

用TG－DTG－DTA热分析技术,研究了N,N’－双（2－氨乙基）草酰胺合酮（Ⅱ）配合物在动态空气气氛中的热行为,用微分法（Achar法）和积分法（Coats-Redfen法）协同处理非等温TG数据,通过对比热分解动力学参数E和InA,提出配合物热分解反应机理,并由动力学补偿效应获得了E与InA的数学表达式。     

对甲苯磺酰氨基酸甲醇或2,2-联吡啶混配Cu(II)配合物的电化学合成及表征

采用金属Cu为“牺牲阳极”,在含配体对甲苯磺酰L-异亮氨基酸(H2L)的甲醇溶液中电解合成了[Cu(L)(2CH3OH)]配合物.当向含配体的甲醇溶液中加入2,2′-联吡啶时,电解合成了[Cu(L)(2,2’-bipy)]配合物.利用元素分析、红外光谱、紫外光谱、热分析对配合物进行了表征.测试了铜电极在溶液中的电化学行为和配合物的电化学性质.     

Recovery Properties of Polysulfone Hollow Fiber Chelating Membrane Modified with Thiourea for Mercury （ Ⅱ ）

The adsorption isotherms of the polysulfone hollow fiber chelating membrane modified with thionrea as chelating groups for Hg^2＋ were determined. The effects of mobile phase conditions and the operating parameters on removal performance of the chelating membrane for Hg^2＋ were also investigated. The recovery of Hg^2＋ decreased at low pH and the optimum range of pH was from 6 to 7. The feed concentration effected on recovery of Hg^2＋ at the specified loading amount of Hg^2＋. The Hg^2＋ could be removed from different concentration feed solution by chelating membrane. The increase of feed flow rate led to slight decrease of recovery of Hg^2＋ at the specified loading amount of Hg^2＋. The chelating membrane could be operated at height feed flow rate and a large-scale removal of H^2＋ could be realized. With the increase of load amount, Hg^2＋ recovery decreased, but the saturation degree of chelating membrane increased. According to required recovery of H^2＋ and the saturation degree of chelating membrane, the optimum loading amount of Hg^2＋ should be selected in the actual removal of H^2＋.     

Diversity in enoyl-acyl carrier protein reductases

The enoyl-acyl carrier protein reductase (ENR) is the last enzyme in the fatty acid elongation cycle. Unlike most enzymes in this essential pathway, ENR displays an unusual diversity among organisms. The growing interest in ENRs is mainly due to the fact that a variety of both synthetic and natural antibacterial compounds are shown to specifically target their activity. The primary anti-tuberculosis drug, isoniazid, and the broadly used antibacterial compound, triclosan, both target this enzyme. In this review, we discuss the diversity of ENRs, and their inhibitors in the light of current research progress. Received 3 November 2008; received after revision 5 December 2008; accepted 8 December 2008     

铅分子印迹聚合物合成与性能研究

以bis[(3-甲氧基硅)丙基]乙二胺为功能单体,铅离子为模板分子,正硅酸乙酯为交联剂,无水乙醇与二甲基甲酰胺混合液为络合溶剂,十二胺为扩孔剂,采用预组装方法结合二重印迹技术合成得到铅分子印迹聚合物.研究了该聚合物对铅的吸附和选择识别能力,采用红外光谱及比表面测定仪进行了结构表征.结果表明,所合成的聚合物对铅离子具有良好的吸附和选择识别能力,最大吸附量为1076μg/g,对铅离子的分配系数为172.4,是其它金属离子的10倍以上.填充有印迹聚合物的分离柱应用于痕量铅的处理,具有优良的分离富集能力.     

Formation of the inclusion complex of Orange II with β-Cyclodextrin and its photostability

Inclusion complex of Orange II with β-Cyclodextrin (β-CD) and the anti-photolysis effect under UV-light were investigated. The molar ratio of inclusion complex of β-Cyclodextrin and Orange II is 1∶1. The formation constantK = 1.236×10³ L/mol was determined by the UV and Fluorescence spectra respectively, which was quite in accordance with the calculation with a modified Benesi-Hildbrand equation. The inclusion complex was characterized by the IR spectra and the molar ratio of inclusion complex is 1∶1 too. The formation constantK = 1.266×10³ L/mol was determined by¹H NMR analysis and was nearly the same by UV and fluorescence spectra. The photocatalytic decolorization rate of Orange II solutions containing β-CD and TiO₂ was smaller by 51.9% than that of the Orange II solutions only containing TiO₂, while in the case of direct photolysis of Orange II solutions, β-CD can lower the photolysis rate by 48.1% under UV-light. This result indicates β-CD can inhibit the photolysis and photocatalytic decolorization of Orange II under UV-light. The β-CD inclusion complex was found to be persistent to UV-light photolysis. Foundation item: Supported by the National Natural Science Foundation of China (20177017) Biography: Lu Ping (1958), male. Associate professor, research direction: environmental photochemistry.     

不对称混合型配合物[Ru(ptp)(bpy)Cl]ClO4的合成与表征

合成了含三齿不对称多吡啶配合物[Ru(ptp)(bpy)Cl]ClO4和bpy分别表示3-(2-邻菲罗啉基)-1，2，4-三嗪并[5，6．f]菲和2，2’-联吡啶)，用元素分析(EA)、电喷雾质谱(ES-MS)、核磁共振氢谱(^1H-NMR)和电子吸收光谱(UV-vis)对其进行了表征，用循环伏安法和交流伏安法研究了配合物的电化学性质，由于ptp较强的吸电子能力，使它与[Ru(ptp)(bpy)Cl]ClO4和[Ru(pta)(bpy)Cl]ClO4相比，MLCT峰向长波方向移动，而阳离子的氧化峰也变得更正。     

[Ni(dien)2](NO3)2的合成与晶体结构

合成出硝酸镍与二乙烯三胺(dien)的新的配位化合物，并分析讨论该配合物的晶体结构。     

内蒙古部分地区猪圆环病毒2型(PCV-2)感染的血清学调查

应用酶联免疫吸附实验(ELISA)方法对内蒙古部分地区猪场的182份猪血清进行猪圆环病毒2型(PCV-2)感染的抗体检测,其中包括母猪、种公猪、哺乳仔猪、生长育肥猪、保育猪.平均阳性感染率为39.6%(72/182),母猪阳性感染率为44.9%(22/49),种公猪阳性感染率为73.7%(14/19),生长育肥猪阳性感染率为38.8%(19/49),保育猪阳性感染率为40.5%(17/42),哺乳仔猪全部为阴性(15).实验检测结果证实,内蒙古地区养猪场存在猪圆环病毒II型(PCV-2)感染,而且比较严重.