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High Technology Letters 1995年第1期1卷 102-104页

作者： Xiaowen, zh. Xueping, L. Yuan, L. Xurui, X. Songbin, zh. Zongju, X. Yinghua, Z. Academia Sinica Beijing China

Ultrafine PbS particles with different sizes have been prepared in perfluorocarboxylated cation-exchanged films. The variation of PbS particle size was clarified by absorption spectra and TEM graphs. Time-resolved optical Kerr effects were measured by femtosecond pump-probe techniques. optical Kerr effect response time was estimated to be less than 165 fs. A third-order optical nonlinearity of χ(3)10-12 esu for PbS particles was obtained and it was found that it increases with the decrease of particle sizes, showing the influence of quantum confined effect on optical nonlinear behaviour of ultrafine particles.

关键词： PbS Ultrafine particle optical nonlinearity optical Kerr effect

Sonar Image Processing System for an Autonomous Underwater Vehicle(AUV)

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High Technology Letters 1995年第1期1卷 71-75页

作者： Wen, X. Yuling, W. Weiqing, zh. Academia Sinica Beijing China

Sonar image processing system is an important intelligent system of Autonomous Un-derwater *** on TMS320C30 high speed DSP,it is used to realize sonar imagecompression and underwater object detections including obstacle recognition in real *** paper,the software and hardware designs of this system are introduced and the experi-mental results are given.

关键词： Autonomous underwater vehicle Sonar image processing Digital signal processor

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汉语词尾“了”是先时标记吗?

汉语学习 2024年第6期 59-68页

作者：许钊浙江大学汉语史研究中心/文学院浙江杭州310058

汉语词尾“了”并非先时标记。一方面,“了”在最简结构句中不一定编码句子的过去时意义;另一方面,“了”不具备独立表达相对过去时意义的语法功能。因此,无论从绝对时还是相对时的角度来看,词尾“了”都不能被定义为先时标记。在此基础... 详细信息

汉语词尾“了”并非先时标记。一方面,“了”在最简结构句中不一定编码句子的过去时意义;另一方面,“了”不具备独立表达相对过去时意义的语法功能。因此,无论从绝对时还是相对时的角度来看,词尾“了”都不能被定义为先时标记。在此基础上,从体貌角度对“了”的功能进一步探讨,指出“了”起到了将概念情状转化为现实情状的实现体功能,并对转换的机制和类型进行了分析,为研究时间结构与时体特征这两个层面的相互关系做好准备。

关键词： “了” 时体情状

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Photoelectrochemical Behaviours of Tandem Semiconductive Electrode

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Chinese Chemical Letters 1997年第8期8卷 721-724页

作者： Jiang, DL Han, zh Song, YH Wang, QF Tong, RT Li, GC HEBEI TEACHERS UNIV DEPT CHEMHEBEI 050016PEOPLES R CHINA HEBEI CHEM EngN INST HEBEI 050016PEOPLES R CHINA

The photoelectrochemical behaviour of the multilayer semiconductive electrode(GaAs/AlxGa1-xAs)with the structure of N+NP and N+NPP was studied in Na2So4 solution. Compared with single kind semiconductor electrode, the commposite one has broader photoresponse spectral region and larger open-circuit photovoltage,consequently gives higher solar energy conversion efficiency.

关键词： Ga Photoelectrochemical Behaviours of Tandem Semiconductive Electrode Li

Preparation and Application of Polymyxin B Affinity Membrane Cartridge

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Chinese Chemical Letters 1997年第8期8卷 745-746页

作者： Guo, W Shang, zh Yu, YN zhou, LM zhou, K CHINESE ACAD SCI DALIAN INST CHEM PHYSDALIAN 116012PEOPLES R CHINA SHAngHAI MED UNIV ZHONGSHAN HOSPSHANGHAI 200032PEOPLES R CHINA

Affinity membrane was used for the endotoxin adsorption. The matrix macropore membrane was prepared from filterpaper by chemically crosslinking, and polymyxin B was immobilized as affinity ligand. The prepared membrane cartridge can be used for the removal of endotoxin from aqueous solutions. With a cartridge of 40 sheets affinity membrane containing, the endotoxin level of the processed solution can be reduced to a minimum of 4 pg/mL.

关键词： Preparation and Application of Polymyxin B Affinity Membrane Cartridge

A Facile Procedure for the oxidative Coupling of 2-Naphthol and 2-Naphthalenethiol in Solid State

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Chinese Chemical Letters 1998年第7期9卷 603-604页

作者： Li, TS zhang, zh Yang, F Duan, HY Li, BZ Tewari, BB Hebei Univ Dept Chem Baoding 071002 Hebie Province Peoples R China

The oxidation of 2-naphthol and 2-naphthalenethiol to 1,1'-bi-2-naphthol and bis-2-naphthyl disulfide respectively has been carried out in excellent yields in solid state in the presence of Fe3+-montmorillonite or alu... 详细信息

关键词： oxidative coupling 2-naphthol 2-naphthalenethiol Fe3+-montmorillonite FeC1(3)-A1(2)o(3)

Involvement of apoptosis of alveolar epithelial cells in acute pancreatitis-associated lung injury

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World Journal of Gastroenterology 2000年第6期6卷 920-924页

作者： Yuan YZ Gong zh Lou KX Tu SP zhai ZK Xu JY Shanghai Med Univ 2 Ruijin Hosp Dept Gastroenterol Shanghai 200025 Peoples R China

INTRoDUCTIoNAcute pancreatitis in a common and potentially fataldisease which is associated with considerablemorbidity and a mortality rate of approximately30%;its pathogenesis remains *** of death is often due to mul... 详细信息

关键词： pancreatitis lung/injuries apoptosis protein P53 immunohistochemistry platelet activating factor

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论城镇居民休闲消费力的培育

消费经济 2006年第1期22卷 57-60,64页

作者：李永周魏静武汉科技大学管理学院武汉430081

全面小康社会是基于经济发展基础之上的经济、社会和人全面发展的发展新阶段。基于人类发展和享受等高层次需要的休闲消费的实现,是评价和衡量城镇居民全面小康水平的重要标志。本文运用制度分析的方法阐述了全面建设小康社会时期发展... 详细信息

全面小康社会是基于经济发展基础之上的经济、社会和人全面发展的发展新阶段。基于人类发展和享受等高层次需要的休闲消费的实现,是评价和衡量城镇居民全面小康水平的重要标志。本文运用制度分析的方法阐述了全面建设小康社会时期发展休闲经济的战略意义,提出培育城镇居民休闲消费力的战略措施。

关键词：休闲经济全面小康社会休闲消费力

Structural and Physical Property Analysis of Zno-Sno_2—In_2o_3—Ga_2o_3 Quaternary Transparent Conducting oxide System

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Journal of Materials Science & Technology 2013年第5期29卷 419-422页

作者： P.Jayaram T.P.Jaya Smagul zh.Karazhanov P.P.Pradyumnan Department of Physics University of CalicutCalicut University(P.O.)Malappuram DistrictKerala 673 635India Department for Solar Energy Institute for Energy TechnologyInstituttveien 182027 KjellerNorway

The increasing demand in the diverse device applications of transparent conducting oxides （TCos） requires synthesis of new TCos of n- or p-type conductivity. This article is about materials engineering of Zno-Sno2- In2o3-Ga2o3 to synthesize powders of the quaternary compound Zn2-xSn1-xlnxGaxo4-δ in the stoichiometry of x = 0.2, 0.3, and 0.4 by solid state reaction at 1275℃. Lattice parameters were determined by X-ray diffraction （XRD） technique and solubility of In3＋ and Ga3＋ in spinel Zn2Sno4 was found at 1275℃. The solubility limit of In3＋ and Ga3＋ in Zn2Sno4 is found at below x = 0.4. The optical transmittance approximated by the UV-Vis reflectance spectra showed excellent characteristics while optical band gap was consistent across 3.2 eV with slight decrease along increasing x value. Carrier mobility of the species was considerably higher than the older versions of zinc stannate spinel co-substitutions whereas the carrier concentrations were moderate.

关键词： Transparent conducting oxides (TCos) Structural studies Mobility optical properties

公平消费与消费公平——沉思于《消费经济》创刊20周年

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消费经济 2006年第2期22卷 6-7页

作者：廖进中湖南大学产业经济研究所

《消费经济》杂志创刊20周年之际，我首先想到的是，它是改革开放的产物，它是市场经济的产物，它是随着我国市场经济的发展而发展起来的。

关键词：创刊20周年消费经济公平沉思市场经济改革开放产物