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THE C_n WP-BAILEY CHAIN 被引量:1
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作者 张之正 黄俊利 《Acta Mathematica Scientia》 SCIE CSCD 2018年第6期1789-1804,共16页
The purpose of this paper is to introduce the concept of Cn WP-Bailey pairs. The Cn WP-Bailey transform is obtained by applying the Ca 6Ф5 summation formula. From thisresult, the C,, WP-Bailey lemma is deduced by mak... The purpose of this paper is to introduce the concept of Cn WP-Bailey pairs. The Cn WP-Bailey transform is obtained by applying the Ca 6Ф5 summation formula. From thisresult, the C,, WP-Bailey lemma is deduced by making use of the Cn q-Dougall summationformula. Some applications are investigated. Finally, the case of elliptic Cn WP-Bailey pairsis discussed. 展开更多
关键词 cn wp-bailey pair cn wp-bailey chain elliptic cn wp-bailey pair
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Design,Synthesis and Crystal Structure of Two One-dimensional Zigzag Chain-like Compounds 被引量:1
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作者 秦政涛 盛天录 +5 位作者 胡胜民 项生昌 傅瑞标 王欣 沈超君 吴新涛 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第8期1013-1019,共7页
Two one-dimensional chain-like cyanide-bridged compounds, [Fe(Phen)2(CN)2Ni(Cyclam)](ClO4)2·DMF-2H2O 1 (Cyclam = 1,4,8,11-tetraaza-cyclotetradecane, Phen = 1,10-phenanthroline, and DMF = N,N-dimethylform... Two one-dimensional chain-like cyanide-bridged compounds, [Fe(Phen)2(CN)2Ni(Cyclam)](ClO4)2·DMF-2H2O 1 (Cyclam = 1,4,8,11-tetraaza-cyclotetradecane, Phen = 1,10-phenanthroline, and DMF = N,N-dimethylformamide) and [Fe(Phen)2(CN)2Zn(Cyclam)](PF6)2·CH3CN 2, were prepared by the reaction of [Fe(Phen)2(CN)2]·2H2O with M(Cyclam)^2+ (M = Ni, Zn). In complexes 1 and 2, the metal atoms are connected alternatively with CN groups. X-ray structure and IR analyses for 1 and 2 were performed. Structure analysis revealed that both complexes are centrosymmetric and the geometry around each metal atom is an octahedron. The two complexes crystallize in triclinic with space group of P^1-. For 1, a = 10.439(4), b = 14.976(7), c = 15.914(8)A,α = 83.168(15), β = 74.338(15), γ = 78.023(15)°, V = 2338.3(18)A^3, Z = 2, Mr = 1035.37, Dc = 1.471 g/cm^3, F(000) = 1076,μ = 0.895 mm^-1, the final R = 0.0616 and wR = 0.1414 for 5849 observed reflections (1 〉 2σ(I)). For 2, a = 9.656(6), b = 15.404(9), c = 15.822(10)A, α = 78.68(2), β= 78.917(19), γ = 77.15(2)°, V = 2223(2)A^3, Z = 2, Mr = 1064.87, Dc = 1.587 g/cm^3, F(000) = 1078,μ = 1.032 mm^-1, the final R = 0.0672 and wR = 0.1595 for 6819 observed reflections (I 〉 2σ(I)). 展开更多
关键词 cn bridge iron crystal structure zigzag chain π-π stacking
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大中型飞机分布式通信导航监视系统架构设计
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作者 杨斌 雷国志 《电讯技术》 北大核心 2022年第7期865-873,共9页
分布式设计已成为下一代大中型飞机设计热点,其中机载通信导航监视(Communication,Navigation and Surveillance,CNS)系统架构设计十分重要。为解决当前架构适航支持能力和新功能插入能力不强的问题,提出了分布式CNS系统的系统架构及系... 分布式设计已成为下一代大中型飞机设计热点,其中机载通信导航监视(Communication,Navigation and Surveillance,CNS)系统架构设计十分重要。为解决当前架构适航支持能力和新功能插入能力不强的问题,提出了分布式CNS系统的系统架构及系统设计方法,并与联合式、集中式和分布式架构进行对比分析,得出分布式系统架构开放性和适航性好,具备优良的装机特性,可以为下一代机载CNS系统研制奠定基础。 展开更多
关键词 大中型飞机 分布式通信导航监视 系统架构 创新链 远端无线电单元(RRU)
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Etiological characteristics and treatment of tardive dyskinesia
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作者 Zhe Li Xueli Sun Che Zhou 《Neural Regeneration Research》 SCIE CAS CSCD 2006年第6期549-552,共4页
OBJECTIVE : The pathogenesis of tardive dyskinesia (TD) is complicated and uncertain, Thus, there is not any effective treatment for it. The psychiatrists pay more and more attention to TD, which lasts for a long t... OBJECTIVE : The pathogenesis of tardive dyskinesia (TD) is complicated and uncertain, Thus, there is not any effective treatment for it. The psychiatrists pay more and more attention to TD, which lasts for a long time and is difficult to treat. DATA SOURCES: A computer-based online search of Medline database was undertaken to identify articles about the feature of etiology and the progression of treatment for TD published in English by using the keywords of "rD, etiology, pathogenesis" and "TD, therapy, drug treatment". Meanwhile, Chinese articles about the feature of etiology and the progression of treatment for TD were searched in Wanfang database and China journal full-text database, and the keywords were "TD, etiology, pathogenesis" and "TD, therapy, drug Treatment" in Chinese. STUDY SELECTION: Articles met the following inclusion criteria were selected in this paper. Inclusion criteria: (1) Researches of randomized blind control design, before and after control design and retrospective. (2) Researches of the feature of etiology and the progression of treatment for TD. Exclusion criteria: the repetitive researches and individual reports. DATA EXTRACTION : Totally 65 articles related the feature of etiology and the progression of treatment for TD of randomized blind control design, before and after control design and retrospective studies were collected, and 53 of them were accorded with the inclusion criteria. Of the 12 excluded ones, 8 were concerning with genetics, 4 were repetitive researches. DATA SYNTHESIS : The feature of etiology for TD includes:(1) Hypothesis of dopamine receptor super-sensitivity: The dopamine receptor is persistently blocked, so it will result in functional disorder in CNS, and then TD may take place. (2)) Hypothesis of neuronal degeneration: The concentration of aminosuccinic acid and glutamic acid will increase after the antipsychotic used for a long time and this will result in neuronal degeneration through glutamic acid receptor in the postsynaptic membrane; meanwhile with free radical, the nerve cells of corpus striatum may degenerate and become necrosis. (3) Sex and age: The females and gerontal patients are liability to the TD disease. It is may related to the lower estrogen. (4) Molecule heredity: TD may association with the dopamine and 5-HT receptor gene polymorphism. (5) Other theories: Hypofunction of γ-amino-butyri acid (GABA), hypothesis of noradrenaline 5-serotonin and nutrition metabolism can cause TD disease. Treatlent for TD: (1) Dopamine receptor agonist: The therapeutic effect is not satisfactory, especially for gerontism females. (2) Oxygen free radical scavenger: As represent of vitamin E, it can clear out free radicals and reduce the potential cytotoxic effect of free radicals. (3) Calcium channel blocker: This maybe related to block calcium ions releasing from muscle cells and inhibit muscle convulsion; therefore, it can be used for symptomatic treatment. (4) GABA receptor agonist: It is more effective for the prominent dysmyotonia than dancing slowly symptom. (5) Antipsychotic: There is some therapeutic effect with ciozapine, but the effect will reduce because of the age growing up and the symptom exacerbating. (6) Other therapies: Valproate sodium, cyproheptadine, melatonin, branched chain amino acid, ahalysantinfarctasum, electric acupuncture and injection ad acumen, traditional Chinese drug have a certain effects on TD. Prevention of TD: The serum creatine phosphokinase (CPK) combined with symptoms should be checked regularly so as to early discovery TD. CONCLUSION : (1) Etiology of TD: The hypothesis of dopamine receptor super-sensitivity is denyed; the hypothesis of neuronal degeneration is approved in academic circles; the sex and age is a finding of generally received; but the dopamine and 5-HT receptor gene polymorphism, hypofunction of GABA, noradrenaline, 5-serotonin and nutrition metabolism cannot explain the pathogenesis of TD. (2) Treatment for TD: The therapeutic effect of dopamine receptor agonist is not satisfactory; the oxygen free radical scavenger maybe effective; calcium channel blocker maybe used for symptomatic treatment; GABA receptor agonist maybe more effective for the prominent dysmyotonia than dancing slowly symptom; the consequence of antipsychotic is discrepancy; other therapies maybe use to adjunctive therapies. (3) As far as prevention of TD is concerned, and the serum CPK combined with symptoms should be checked regularly so as to early discovery TD. 展开更多
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