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Copyright of Progress in Earthquake Sciences is the property of China Earthquake Administration, Institute of Geophysics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Acta Agronomica Sinica is the property of Crop Science Society of China and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Telecommunications Science is the property of Beijing Xintong Media Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Journal of Clinical Nursing in Practice is the property of Journal of Clinical Nursing in Practice (Editorial Board, Shanghai Jiao Tong University Press) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Forensic Science & Technology is the property of Institute of Forensic Science, Ministry of Public Security and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan University of Science & Technology, Natural Science is the property of Editorial Office of Journal of Henan University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Forensic Science & Technology is the property of Institute of Forensic Science, Ministry of Public Security and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Transactions of Beijing Institute of Technology is the property of Beijing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The uncertainty source during the gravimetric procedure caused by the application of 0.1 mg sensitivity mass comparator is discussed and evaluated according to standard procedure. The uncertainly of one single weighing procedure is 0.2 mg by using 0.1 mg sensitivity mass comparator. By enlarge the filling amount of the component, the former main contribution (uncertainty of weighing) of the obtained reference gas become lower than other uncertainly sources such as the uncertainly of purity, even the uncertainty of mass molecular. The standard uncertainty of reference gas could be less than 0. 02% while the reference gas is prepared by 0.1 mg sensitivity mass comparator. [ABSTRACT FROM AUTHOR]

Seven complex shaped thin-walled aluminum alloy members were tested under axial compression to investigate the local buckling and the interaction of local and global buckling behaviors. The member lengths studied were 350 mm and 190 mm, respectively. The directions of initial imperfection were in the symmetric and un-symmetric axis of the cross-section with the magnitude of 1/500 and 1/70 of the column height, respectively. Measured results included the failure modes, buckling strengths and load-axial displacement curves. A nonlinear finite element (FE) model was developed. The accuracy and reliability of the FE model was verified by experimental results. Parametric studies including 615 models consisted of different plate thickness and column heights were carried out using the validated FE model. Buckling strengths predicted by the FE model were compared with those calculated by the current design methods, including the American aluminum (AA) design manual, the European code (EC9), Chinese design specification for aluminum structures (GB 50429) and the direct strength method (DSM). Comparison results show that the cuiTent design methods underestimate the buckling strengths of complex shaped aluminum alloy members under axial compression. The buckling strengths obtained by the design codes are less than 85% of those predicted by FE model. The DSM can accurately predict the buckling strength of aluminum alloy members with complex shaped cross section under axial compression forces. Ratio between the buckling strength obtained from DSM and FE model is about 0.90. [ABSTRACT FROM AUTHOR]

Six 6063-T5 aluminum alloy tensile coupon tests were carried out and stress-strain curves obtained from tests were compared with the Ramberg-Osgood model. Comparison results show that the Ramberg-Osgood model can precisely describe mechanical properties of 6063-T5 aluminium alloy. Behaviors of ten axial compression tests on stiffened closed-section thin-walled aluminum alloy members were studied experimentally and numerically. The axial displacement, bearing capacity, lateral deflection, strain development and the failure modes of the tested specimens were recorded. All specimens failed by the interaction of local buckling and section yielding. A finite element model was presented to simulate behaviors of the tested component under axial load. The buckling strength and failure modes obtained from numerical simulation agree very well with test results. Current design codes for aluminium alloy structures, such as the American aluminum design manual (AA), the European code (BS EN1999-1-1), Chinese design specifications for aluminum structures ( GB 50429-2007), the North American specification for the design of cold-formed steel structural members (AISI) and the direct strength method (DSM), were used to calculate the buckling strength of the tested components. Comparison results show that current design codes could be applied to the design of the local buckling for stiffened closed-section thin-walled aluminum alloy columns under axial compression loads. The ratio of buckling strength predicted by DSM to the measured buckling strength is about 1.20 which indicates that the current DSM overestimates the local buckling strength for stiffened closed-section thin-walled aluminum alloy columns under axial compression loads. And a modification to the current DSM is required for the design of stiffened closed-section thin-walled aluminum alloy columns failed by local buckling. [ABSTRACT FROM AUTHOR]

局部应用氟化物是世界公认的有效防龋措施之一。氟保护漆作为一种缓释剂型的氟化物，最早于1994年被批准应用于临床。现在临床常用的氟保护漆有duraphat (2.26%F)和protector(0.10%F)2种。前者以松香为基质，后者以聚氨基甲酸乙酯为基质，此外还含有蜂蜡、树胶、虫胶、乳漆、流动增强剂、糖精、调味剂等成分，这决定了氟保护漆有高黏度、遇唾液固化、味甜的特点。氟保护漆使用安全、操作简便、作用持续稳定、易被人接受，因而在临床上应用广泛。本文根据近年来国内外学者的研究，就氟保护漆防龋的作用机制及临床应用进行综述。 [ABSTRACT FROM AUTHOR]