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1.
从研究新型鱼雷作战试验鉴定出发,阐述了鱼雷作战适用性试验的重要意义,论述了如何基于Bayes 序贯概率比检验(SPRT)方法进行鱼雷作战适用性试验设计,说明了作战试验样本的确定,利用A.Wald提出的序贯概率比检验引出Bayes SPRT方法,定量明确了试验方案,最后采用Bayes SPRT方法作出了不同验前概率下的Bayes截尾SPRT方案,为海上靶场新武器作战适用性试验研究提供参考.  相似文献   

2.
本文给出了比率检验的OC函数、子样平均值(简记为ASN)■(θ)、时间(0,n]内终止试验的概率Q_(u v)等准确的计算方法。可用此方法对比率检验中的单式抽样方案、SPRT方案及各种截尾序贯方案进行评定。  相似文献   

3.
战术导弹贝叶斯检验方案设计与应用研究   总被引:1,自引:1,他引:0  
分析了试验子样数、验前概率、检出比、检验指标等对贝叶斯 (Bayes)检验方案的影响 .根据战术导弹武器系统试验的特点和实际情况 ,提出了检验方案的参数选取方法、方案设计方法和实际应用方法 ,试图寻求一条将Bayes方法应用于战术导弹武器系统靶场试验与鉴定的正确途径 ,以达到最终能减少试验子样数 ,提高试验置信度的目的  相似文献   

4.
基于Bayes验后风险定义,系统研究了Bayes序贯检验和序贯截尾检验方法,给出了简洁实用的Bayes序贯检验和序贯截尾检验工程设计方法,对试验工程有较大的借鉴意义.  相似文献   

5.
针对导弹脱靶量的检验问题,分析了Bayes假设检验方法及其应用,推导了Bayes序贯检验方法.通过计算分析,证明通过利用验前信息,可以降低试验风险和减少试验子样,使鉴定结论更加可信.  相似文献   

6.
王康  史贤俊  秦亮  聂新华  龙玉峰 《兵工学报》2019,40(11):2319-2328
针对当前序贯概率比检验方法会导致测试性验证样本量无法控制,以及序贯网图检验方法未能利用先验信息使得确定的样本量仍然存在可能较大的问题,提出一种基于Bayes小子样理论和序贯网图检验相结合的测试性验证样本量确定方法。基于序贯网图检验方法,结合测试性指标的先验分布以及相关参数约束值,划分指标参数空间,并给出Bayes因子及其阈值计算方法;通过对检验点插入位置的确定,给出测试性验证所需最大样本量,同时在考虑使用方风险和承制方风险的基础上设计Bayes小子样理论下序贯网图检验的截尾策略;通过实例进行了验证,并与经典验证方法、序贯概率比检验方法、传统序贯网图方法以及验后序贯加权检验方法进行了对比分析。结果表明,该方法确定的测试性验证截尾样本量以及平均样本量均优于其他方法,同时能有效降低双方风险值。  相似文献   

7.
基于Weibull过程的可靠性增长试验Bayes分析   总被引:1,自引:0,他引:1  
基于Weibull过程的可靠性增长试验Bayes分析,首先推导定时截尾情况下布形式.然后,在截尾时间内的期望故障数的验前分布服从Gamma分布情况下,导出简捷的验后分布形式.在利用该结果进行可靠性评定时,需采用矩相等的转换方法进行验前信息的转换和失效强度验后分布的估计.仿真表明,该方法精度较好,评估过程可靠.  相似文献   

8.
本文利用广义伯努利过程参数确定导弹飞行试验抽检方案。以研制性全弹飞行试验结果作为设计定型飞行试验的验前信息;以设计定型飞行试验结果作为生产定型飞行试验的验前信息;以定型试验结果作为批检飞行试验的验前信息,给定置信概率和导弹的命中概率后,可得到设计定型、生产定型、批检飞行试验的抽检方案。若置信概率为0.8、命中概率为0.7时,广义伯努力过程参数所确定的设计定型试验发数要比单式抽检(鉴别比为1.4,生产方、使用方风险率为0.25时)确定的试验发数少,也比二项分布序贯截尾(鉴别比为1.4,生产方、使用方风险率为0.25)确定的平均试验发数少。  相似文献   

9.
把 Bayes 统计推断理论应用于射击密集度的统计分析,建立了射击密集度的 Bayes 决策理论。在给定样本容量和给定 Bayes 决策风险上限的情况下,研究了样本容量、验前信息可信度和 Bayes 决策风险三者之间的关系,为小子样条件下的密集度鉴定试验提供了理论方法和依据。  相似文献   

10.
导弹武器系统制导精度综合鉴定方法研究   总被引:2,自引:0,他引:2  
在对现行导弹武器系统制导精度鉴定方法的不合理性分析的基础上,提出了综合数学仿真模拟打靶验前信息并结合Bayes小子样统计理论来进行导弹武器系统制导精度综合鉴定的新思路.  相似文献   

11.
Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.  相似文献   

12.
The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS (geographical information system) data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.  相似文献   

13.
By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.  相似文献   

14.
Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.  相似文献   

15.
The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.  相似文献   

16.
By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux (kernel version 2.6.11 ) is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.  相似文献   

17.
An expression for estimating the aeroheating on a warhead nose at different supersonic speeds is proposed by incorporating CFD (computational fluid dynamics) and the least-square method. Compared with the traditional estimation formula, the expression is more accurate, convenient and can be used in the optimized design of warheads. The error from the result obtained in the test of a ball cartridge flight is less than 3 %. It satisfies the engineering requirements.  相似文献   

18.
The nonlinear dynamic model of spinning ballistic missiles is established during the first boosting phase of the missile. Based on the conventional backstepping sliding mode control and the assumption of a two time-scale separation of missile dynamics, a graded sliding mode controller is designed with two sub-sliding surfaces which have invariability to external disturbances and parameter perturbations, and a matrix which comprises three first order low pass filters is introduced to prevent "explosion of terms". Owing to the upper bounds of the uncertainties are difficult to obtain in advance, adaptive laws are introduced to estimate the values of the uncertainties in real-time. Eventually, the numerical simulation results given to show the proposed controller can ensure the steady flight of missiles.  相似文献   

19.
For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.  相似文献   

20.
Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.  相似文献   

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