一维优化的最优步长因子法

本文在分析一维优化方法的比例因子法的基础上,提出了一种直接调整步长的最优步长因子法并给出框图。该法较比例因子法理论上完善,迭代控制可靠。     

汉-Ⅰ型智能机器人自律行走控制

本文讨论小车式机器人利用超声波传感器实现自律行走的问题.文中建立机器人行走运动的数学模型.讨论了两种利用超声波传感器和其它传感器确定器人空间位置、速度及姿势的方法.提出了一种分段最优控制方案.     

无穷维线性系统一类优化问题

讨论了无穷继线性系统在约束条件下的最优控制问题,得到取优控制的存在性,唯一性及其特征的一些结果。     

高层筒中筒结构的优化设计及其应用

本文提出了以《高层建筑结构设计建议》有关条文为约束条件,以承重结构材料价为目标函数,运用复合形法原理的优化设计方法,并在IBM PC/XT微机上实现,可获得优化的筒中筒结构设计初步方案。文中运用连续化方法求解筒中筒结构的内力及其位移量,并通过具体工程实例说明该优化方法的应用。     

Tasmanian Phoridae (Diptera) and some additional Australasian species

The list of Phoridae recorded from Tasmania is increased from five species in three genera to at least 52 species in eight genera. One species on the original list is transferred to the status of being incertae sedis. One new genus and 37 new species are described, two being reported from mainland Australia also. One species was previously only known from New Zealand, five from mainland Australia, four from Europe but one of which is now an almost cosmopolitan tramp species and one being from the Holarctic Region. However, one of the 'European' species may have orginally been introduced to Europe from Tasmania. Keys to genera, to all known species of Aphiura, to the Tasmanian species of Megaselia and to the Australasian species of Metopina are provided. A newly named and a new mainland Australian species of Aphiura, three mainland Australasian species of Metopina and three from Papua New Guinea are described and seven undescribed males (given code letters only) of this genus are included in the key (four from Papua New Guinea, two from Western Australia and one from Tonga). Aphiura and Paraphiura are transferred to the tribe Metopinini and the tribe Beckerinini is set aside, as it cannot be satisfactorily characterized as it is currently conceived. Megaselia dissita is synonymized with M. comparabilis.     

Habitat utilization by juvenile hawksbill turtles (Eretmochelys imbricata,Linnaeus, 1766) around a shallow water coral reef

Contemporary studies of sea turtle diving behaviour are generally based upon sophisticated techniques such as the attachment of time depth recorders. However, if the risks of misinterpretation are to be minimized, it is essential that electronic data are analysed in the light of first-hand observations. To this aim, we set out to make observations of juvenile hawksbill turtles (Eretmochelys imbricata, Linnaeus, 1766) foraging and resting in a shallow water coral reef habitat around the granitic Seychelles (4°'S, 55°'E). Data were collected from six study sites characterized by a shallow reef plateau (<5 m) and a flat sandy area at the base of the reef face (<10 m). Observation data were categorized into the following behaviours: (1) stationary foraging; (2) active foraging; (3) resting; and (4) assisted resting. Central to this investigation was the development of a technique for accurately estimating the size of sea turtles in situ based upon previously tested techniques for reef fishes. This revealed that through calibration, the curved carapace length (CCL) of marine turtles can be consistently estimated to within 10 cm of their actual size. Although rudimentary, this has advantages for assessing the residency or absence of specific life history stages from particular environments. Indeed, our data supported previous claims that following the reproductive season, adult hawksbills in the region may move away from the nesting beaches to alternative foraging grounds whilst immature turtles (following the pelagic juvenile stage) may opt to reside in areas close to their natal beaches. With regards to habitat utilization, juvenile hawksbills displayed an alternating pattern of short, shallow foraging dives followed by deeper, longer resting dives. These findings are consistent with previous electronic studies of free-range diving in this species and suggest that the maximization of resting duration may be an important factor driving this behaviour.     

基于MATLAB开发无约束优化设计教学软件包的研究

为提高学生优化设计方法的认识和理解，本文以MATLAB软件为平台。通过对常用无约束优化方法程序的编写、图形用户界面的制作等工作，进行了教学软件包的开发；以满足对无约束优化设计的教学要求。     

舰载雷达面临的电子对抗威胁及应对措施

随着电子对抗技术的发展,雷达的有效性和生存能力面临着严重的、多方面的挑战和威胁。从舰载雷达面临的电子对抗威胁出发,讨论了电子对抗技术给舰载雷达带来的严峻挑战,并从舰载雷达设计、抗干扰技术和舰艇编队雷达系统优化组合配置等方面提出了一些应对措施。     

一类资源约束排序问题1|p_j=b_j-a_ju_j,∑u_j≤U|∑W_jC_j

讨论了一类资源约束排序问题１｜ｐｊ＝ｂｊ－ａｊｕｊ，∑ｕｊ≤Ｕ｜∑ＷｊＣｊＷ＊的性质给出了一个求 该类问题的下降算法．这个方法是非常有效的．     

等价鞅测度选择问题的注记

本文研究了定价理论中的等价测度的选择问题，提出了按相对熵极小化作为一种新的选择标准。所得结论推广了已有的定价理论，尤适用于最小鞅测度不存在的情形。