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Selection of Measured Signals in the Navigation Measuring Complex 被引量:1
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作者 柯芳 Andrey PROLETARSKY Konstantin NEUSIPIN 《Journal of Measurement Science and Instrumentation》 CAS 2011年第4期346-348,共3页
To increase accuracy of navigation parameters,a perspective measuring complex with intellectual components is developed.Conception of synthesis optimal structure of the measuring complex is realized basing on a select... To increase accuracy of navigation parameters,a perspective measuring complex with intellectual components is developed.Conception of synthesis optimal structure of the measuring complex is realized basing on a selective method using principles of the functional systems.Selection of measured information is finished by original numeric criterion of observation level of state vector components.Prediction is realized by algorithm of self-organization that makes synthesis of the optimal complication.Therefore mechanism of self-regulation is realized and accuracy of the selective navigation complex is increased. 展开更多
关键词 selected navigation complex functional systems intellectual components observation level selforganiza tion
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Synthesis,Crystal Structure and PTPs Inhibition of a Zinc(Ⅱ) Complex with N-(4-hydroxybenzyl)-L-serine
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作者 李艳红 卢丽萍 +3 位作者 朱苗力 袁彩霞 冯思思 高增强 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2017年第2期316-323,共8页
The reaction of the reduced Schiff base HL(N-(4-hydroxybenzyl)-L-serine) with Zn(CH3COO)2·2H2O in aqueous solution afforded [Zn(L)2]·3H2O(I). The complex has been characterized by elemental analysi... The reaction of the reduced Schiff base HL(N-(4-hydroxybenzyl)-L-serine) with Zn(CH3COO)2·2H2O in aqueous solution afforded [Zn(L)2]·3H2O(I). The complex has been characterized by elemental analysis, FT-IR, powder X-ray diffraction, electrospray ionization mass spectrometry and single-crystal X-ray diffraction. Complex I crystallizes in the orthorhombic system, space group P212121, with a=9.197(2), b=10.445(2), c=24.149(5) , V=2319.8(8) 3, Z=4, C(20)H(30)N2O11 Zn, Mr=539.83, Dc=1.546 g·cm3, μ=1.122 mm(-1), F(000)=1128, GOOF=0.971, the final R=0.0206 and w R=0.0506 for 4346 observed reflections(I &gt; 2σ(I)). In complex I, each Zn(II) ion coordinates with three carboxyl oxygen atoms and two amine nitrogen atoms from three L-anions, forming a distorted five-coordinated trigonal bipyramidal geometry. Complex I exhibits a 1D wavy chain structure that is extended by hydrogen-bonding interactions to form a supramolecular network. The bioactivity of the complex as a potential PTPs inhibitor in vitro was investigated, displaying potent inhibition against PTP1B(IC(50), 0.24 μM) and TCPTP(IC(50), 0.53 μM) with a moderate selectivity. 展开更多
关键词 hydroxybenzyl Zinc complex with N Synthesis carboxyl coordinated supramolecular distorted selectivity serine
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基于不确定性和复杂性的创新项目管理模式研究 被引量:23
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作者 董静 苟燕楠 封洁 《科研管理》 CSSCI 北大核心 2006年第3期103-109,共7页
不确定性和复杂性的存在为创新项目的管理设置了难题。本文提出了不确定性的四种类型:偏差、可预见的不确定性、不可预见的不确定性和混乱;探讨了在各种不确定性条件下创新项目在管理方式上的差异。然后结合创新项目的复杂性,提出了修... 不确定性和复杂性的存在为创新项目的管理设置了难题。本文提出了不确定性的四种类型:偏差、可预见的不确定性、不可预见的不确定性和混乱;探讨了在各种不确定性条件下创新项目在管理方式上的差异。然后结合创新项目的复杂性,提出了修正法和选择法两种管理模式,并基于成本和价值分析了两种管理模式的适用性。最后,以案例分析法探讨了不同管理模式在创新项目中的实际应用。 展开更多
关键词 创新 不确定性 复杂性 修正法 选择法
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A 3-D Selected Solvent Large Aperture MOF
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作者 火苗 杨文斌 +2 位作者 吴小园 卢灿忠 林琅 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第10期1568-1573,共6页
The metal-organic framework(MOF){[Cu(L1)_(0.5)(CN)]·4H_2O·3DMSO}_n(1) was assembled by 1,4-bis(3?,5?-dicyano-2?,6?-di(pyrid-4-yl)-1?,4?-dihydropyridyl)benzene(L1) together with copper c... The metal-organic framework(MOF){[Cu(L1)_(0.5)(CN)]·4H_2O·3DMSO}_n(1) was assembled by 1,4-bis(3?,5?-dicyano-2?,6?-di(pyrid-4-yl)-1?,4?-dihydropyridyl)benzene(L1) together with copper cyanide at room temperature. In 1,the Cu~+ ions are linked by CN-anions into a 1D helical chain,which is further fused together by tetradentate L1 ligands to build an extended 3D porous framework with two different types of functionalized channels. 1 crystallizes in the monoclinic,space group P21/c with a = 17.8729(6),b = 8.7298(3),c = 22.7524(9) ?,β = 96.072(4)o,V = 3530.1(2) ?~3,μ = 0.845 mm-1,Dc = 1.352 Mg/m^3,Z = 4,Mr = 718.35,F(000) = 1500,S = 1.081,the final R = 0.0877 and wR = 0.2275 for 6975 observed reflections with I 〉 2σ(I). 展开更多
关键词 four-coordinate Cu(Ⅰ) complex crystal structure selected solvent
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Measuring air traffic complexity based on small samples 被引量:7
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作者 Xi ZHU Xianbin CAO Kaiquan CAI 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2017年第4期1493-1505,共13页
Air traffic complexity is an objective metric for evaluating the operational condition of the airspace. It has several applications, such as airspace design and traffic flow management.Therefore, identifying a reliabl... Air traffic complexity is an objective metric for evaluating the operational condition of the airspace. It has several applications, such as airspace design and traffic flow management.Therefore, identifying a reliable method to accurately measure traffic complexity is important. Considering that many factors correlate with traffic complexity in complicated nonlinear ways,researchers have proposed several complexity evaluation methods based on machine learning models which were trained with large samples. However, the high cost of sample collection usually results in limited training set. In this paper, an ensemble learning model is proposed for measuring air traffic complexity within a sector based on small samples. To exploit the classification information within each factor, multiple diverse factor subsets(FSSs) are generated under guidance from factor noise and independence analysis. Then, a base complexity evaluator is built corresponding to each FSS. The final complexity evaluation result is obtained by integrating all results from the base evaluators. Experimental studies using real-world air traffic operation data demonstrate the advantages of our model for small-sample-based traffic complexity evaluation over other stateof-the-art methods. 展开更多
关键词 Air traffic control Air traffic complexity Correlation analysis Ensemble learning Feature selection
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Complexation Selectivities of Pillar[5]arenes with Primary Ammonium Salts
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作者 Luzhi Liu Yu Chen +2 位作者 Lingyun Wang Herbert Meier Derong Cao 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2013年第5期624-626,共3页
The complexation of alkyl-substituted pillar[5]arenes with primary ammonium salts is investigated. 1,4-Bis- (methoxy)pillar[5]arene (MeP5) can form strong complexes with the primary ammonium salts in CDC13. Howeve... The complexation of alkyl-substituted pillar[5]arenes with primary ammonium salts is investigated. 1,4-Bis- (methoxy)pillar[5]arene (MeP5) can form strong complexes with the primary ammonium salts in CDC13. However, 1,4-bis(ethoxy)pillar[5]arene (EtP5) shows weak interaction with these guests, and 1,4-bis(butoxy)pillar[5]arene (BuP5) can not form such a complex at all. These results indicate that the modified alkyl chains of pillar[5]arene play an important role in the complexation selectivity. 展开更多
关键词 arenes primary ammonium salts complexation selectivity host-guest chemistry bindingproperties
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Synthesis of Copillar[5]arenes and Their Host-Guest Complexation with Two Types of Guests
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作者 Hongfei Huang Luzhi Liu +2 位作者 Wengui Duan Yan Huang Guishan Lin 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2015年第3期384-388,共5页
A series of novel copillar[5]arenes 1a-1f containing different substituents were synthesized.And their com-plexation with two types of guests was investigated.For symmetrical guests,1,4-dibromobutane(DBB)could thread ... A series of novel copillar[5]arenes 1a-1f containing different substituents were synthesized.And their com-plexation with two types of guests was investigated.For symmetrical guests,1,4-dibromobutane(DBB)could thread in the cavity of copillar[5]arenes to form inclusion complexes.But for the unsymmetrical guests,copillar-[5]arene 1f bearing 4-(naphthalen-1-yloxy)butoxy could not complex with sec-butyl iodide(SBI)and sec-butyl bromide(SBB)at all,while 1f showed weak interaction with sec-butylamine•HCl(SBA)outside the cavity.These results indicated that the modified group of copillar[5]arene and the symmetry of guest played an important role in the complexation model and selectivity. 展开更多
关键词 arenes SYNTHESIS complexation selectivity host-guest chemistry
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