0

there are several techniques in use for non-linear refractive index measurement, namely, interferometric techniques, in which conventional inter-ferometers are used, degenerate for wave mixing (dfwm), and z-scan, each of these techniques suffers from some shortcmings. for example conventional interferometers like fabry-perot and twyman-green need high quality optical components, unwanted reflec...

ä¸ºäº†æ›´å¥½å¯¹åŸŽå¸‚ç”Ÿæ€è´¨é‡è¿›è¡Œç›‘æµ‹å’Œè¯„ä»·ï¼Œæž„å»ºä¸€ä¸ªæ›´ç²¾ç¡®çš„åŸŽå¸‚é¥æ„Ÿç”Ÿæ€æŒ‡æ•°ååˆ†å¿ è¦ã€‚æœ¬æ–‡ç»“åˆç»¿åº¦ã€æ¹¿åº¦ã€å¹²åº¦ã€çƒ­åº¦å’Œç©ºæ°”è´¨é‡æŒ‡æ ‡é‡‡ç”¨ä¸»æˆåˆ†åˆ†æžPCA（Principal Component Analysis） 构建改进型遥感生态指数MRSEI（Modified Remote Sensing Ecological Index）；利用熵权法计算压力—状态—响应模型PSR （Pressur...

Performance measurement is always one of the most important tasks of managers, so knowledge management is measurement knowledge, and if we can measure something, we can no doubt control it, and therefore we cannot manage it. In this paper, according to the Malmquist productivity index, an index is used to determine the progress and regress of a unit. This index is defined by the boundary change...

Generally, aquatic communities reflect the effects of anthropogenic changes such as deforestation or organic pollution. The Cerrado stands among the most threatened ecosystems by human activities in Brazil. In order to evaluate the ecological integrity of the streams in a preserved watershed in the Northern Cerrado biome corresponding to a mosaic of ecosystems in transition to the Amazonia biom...

Macroalgae is a biological key element for the assessment of the ecological status in coastal waters in the frame of the European Water Framework Directive (WFD, 2000/60/EC). Here we propose a methodology for monitoring water quality based on the cartography of littoral and upper-sublittoral rocky-shore communities (CARLIT, in short). With the use of spatial databases, GIS, and available inform...