光纤陀螺标度因数的精确标定与补偿

根据光纤陀螺信号静态漂移的数学模型,提出了一种迭代标定方法,可以精确地补偿光纤陀螺的标度因数和安装偏角误差.考虑光纤陀螺标度因数与温度的非线性关系,采用了BP神经网络进行温度补偿,取得了理想的效果.     

Ku波段低噪声放大器的设计

运用ADS仿真设计工具,应用Fujitsu公司的FHX04X管芯,分析设计了一个Ku波段的二级平衡式低噪声放大器,在14 GHz～16 GHz的频率范围内获得了低于2 dB的噪声系数,大于16 dB的增益,同时满足输入输出驻波比小于2,输出1 dB压缩功率点大于8 dBm.并和单端电路形式的设计结果进行了比较.     

基于球坐标变换的双星编队伪距相对定位

针对NASA的ST -3中自主编队飞行 (AFF)的双星星座 ,讨论利用星载的类GPS高精度的伪距观测数据确定星座之间相对位置和时间参数的问题。在常用的直角坐标系中建立系统的数学模型 ,并进行解算 ;特别针对双星编队定位解算几何结构弱、解算结果的协方差矩阵不稳定而无法进行传统协方差分析的问题 ,提出了基于球坐标变化的伪距定位方法     

Bin‐packing problem with concave costs of bin utilization

We consider a generalized one‐dimensional bin‐packing model where the cost of a bin is a nondecreasing concave function of the utilization of the bin. Four popular heuristics from the literature of the classical bin‐packing problem are studied: First Fit (FF), Best Fit (BF), First Fit Decreasing (FFD), and Best Fit Decreasing (BFD). We analyze their worst‐case performances when they are applied to our model. The absolute worst‐case performance ratio of FF and BF is shown to be exactly 2, and that of FFD and BFD is shown to be exactly 1.5. Computational experiments are also conducted to test the performance of these heuristics. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

学术腐败现象探析

学术腐败现象是指科学研究不讲科学精神,在学术研究中大搞“假、冒、伪、劣产品”,获取名誉地位。其具体现象有拼凑、改头换面、编造数据、剽窃他人成果等。针对这些现象提出了加强思想道德教育、健全相关法规、加大监察力度、专家双盲审稿等遏制措施。     

关于推进消防宣传社会化的几点思考

消防工作宣传系于一半,消防宣传是做好消防工作的重要环节,分析我国当前消防宣传工作的现状和存在的主要问题,论述了消防宣传社会化的内涵和必要性,探索消防宣传社会化的新机制,就如何加强新时期消防宣传工作社会化提出了新思路。     

美国军人荣辱观形成的社会文化机制

军人群体的荣辱观作为一种对外在环境和事物的价值判断,对军人的行为产生持久、有效的支配性影响。军人荣辱观的形成主要受社会文化环境、军队亚文化以及大众传媒、民间组织、国家战略、家庭等因素的影响。本文主要从经济因素、宗教因素、教育因素、阶级因素、种族因素等五个方面探讨了美国社会、文化对美军人荣辱观的影响。     

Stalking the Secure Second Strike: Intelligence,Counterforce, and Nuclear Strategy

Secure second strike nuclear forces are frequently held to be easy to procure. Analysts have long argued that targeting intelligence against relocatable targets like submarine launched and land mobile ballistic missiles is difficult to obtain. However, the scholarly consensus on intelligence for counterforce operations is seriously overdrawn. Both during and after the Cold War, the United States developed substantial intelligence capabilities to track and target submarines and mobile missiles. These efforts achieved important and under-appreciated success. Second strike forces have been far more vulnerable than most analysts are willing to credit.     

ADAMS的全地形车载火箭炮行进间发射动力学研究

利用多体动力学软件ADAMS、有限元分析软件ABAQUS建立了全地形车载火箭炮系统发射与行驶一体化动力学模型,基于路面功率谱密度函数和谐波叠加法,创建了全地形车野外行驶的三维随机土石路况模型,对战车行进间发射进行了动力学仿真。分析该型号车载火箭炮行进间发射的动力学特性,得到了战车及发射装置的动态响应情况及运动特性和车速对发射的影响规律。仿真结果表明,全地形车可以在土石路况低速行驶完成行进间发射任务。