Several Constant False Alarm Rate （CFAR） architectures, where radar systems often employ them to automatically adapt the detection threshold to the local background noise or clutter power in an attempt to maintain a...Several Constant False Alarm Rate （CFAR） architectures, where radar systems often employ them to automatically adapt the detection threshold to the local background noise or clutter power in an attempt to maintain an approximately constant rate of false alarm, have been recently proposed to estimate the unknown noise power level. Since the Ordered-Statistics （OS） based algorithm has some advantages over the Cell-Averaging （CA） technique, we are concerned here with this type of CFAR detectors. The Linearly Combined Ordered-Statistic （LCOS） processor, which sets threshold by processing a weighted ordered range samples within finite moving window, may actually perform somewhat better than the conventional OS detector. Our objective in this paper is to analyze the LCOS processor along with the conventional OS scheme for the case where the radar receiver incorporates a postdetection integrator amongst its contents and where the operating environments contain a number of secondary interfering targets along with the primary target of concern and the two target types fluctuate in accordance with the Swerling Ⅱ fluctuation model and to compare their performances under various operating conditions.展开更多
Two prevailing ＂traditional＂ notions of human rights also cause the current skeptical mood concerning human rights. Either human rights are seen in a morally exaggerated way as ＂trump cards＂ in political negotiati...Two prevailing ＂traditional＂ notions of human rights also cause the current skeptical mood concerning human rights. Either human rights are seen in a morally exaggerated way as ＂trump cards＂ in political negotiations, or they are pruned back to a purely juridical level, absorbed into legal instances that accord them at most the rank of constitutional rights. In contrast to this, the author defends a political conception of human rights that overcomes the problems besetting both conceptions, but without having to sacrifice their critical, normative content or a realistic role for human rights in international politics. A political conception of human rights assumes, the author argues firstly, that human rights grow out of concrete experiences of injustice and are the product of political struggles. Human rights are, secondly, placeholders for the public thematization of oppression, humiliation, marginalization, and despotism. A third characteristic feature of a political conception of human rights is that human rights raise claims to a rule system that permits access to the freedoms and resources formulated by human rights. And finally, the obligations imposed by human rights are not duties of assistance but institutional duties to realize the conditions for exercising human rights. Human rights, the author concludes, can be ＂used＂ by any person to criticize existing ordering structures and can be activated for political purposes directed to the common good.展开更多
文摘Several Constant False Alarm Rate （CFAR） architectures, where radar systems often employ them to automatically adapt the detection threshold to the local background noise or clutter power in an attempt to maintain an approximately constant rate of false alarm, have been recently proposed to estimate the unknown noise power level. Since the Ordered-Statistics （OS） based algorithm has some advantages over the Cell-Averaging （CA） technique, we are concerned here with this type of CFAR detectors. The Linearly Combined Ordered-Statistic （LCOS） processor, which sets threshold by processing a weighted ordered range samples within finite moving window, may actually perform somewhat better than the conventional OS detector. Our objective in this paper is to analyze the LCOS processor along with the conventional OS scheme for the case where the radar receiver incorporates a postdetection integrator amongst its contents and where the operating environments contain a number of secondary interfering targets along with the primary target of concern and the two target types fluctuate in accordance with the Swerling Ⅱ fluctuation model and to compare their performances under various operating conditions.
文摘Two prevailing ＂traditional＂ notions of human rights also cause the current skeptical mood concerning human rights. Either human rights are seen in a morally exaggerated way as ＂trump cards＂ in political negotiations, or they are pruned back to a purely juridical level, absorbed into legal instances that accord them at most the rank of constitutional rights. In contrast to this, the author defends a political conception of human rights that overcomes the problems besetting both conceptions, but without having to sacrifice their critical, normative content or a realistic role for human rights in international politics. A political conception of human rights assumes, the author argues firstly, that human rights grow out of concrete experiences of injustice and are the product of political struggles. Human rights are, secondly, placeholders for the public thematization of oppression, humiliation, marginalization, and despotism. A third characteristic feature of a political conception of human rights is that human rights raise claims to a rule system that permits access to the freedoms and resources formulated by human rights. And finally, the obligations imposed by human rights are not duties of assistance but institutional duties to realize the conditions for exercising human rights. Human rights, the author concludes, can be ＂used＂ by any person to criticize existing ordering structures and can be activated for political purposes directed to the common good.
