基于图像处理的火焰检测算法研究

简要介绍了火焰检测系统构成和火焰燃烧特性,并根据全炉膛火焰的燃烧特性,从火焰图像中提取了反映炉膛火焰燃烧状态的特征量.最后,通过对火焰图像的处理及对火焰检测算法的分析与研究,利用计算机仿真得出火焰图像特征量与燃烧状态的关系,提出火焰燃烧稳定性判据.该算法能够实时、准确地检测全炉膛火焰的燃烧状况和炉膛中心火焰偏移情况,为...     

脉冲电场诱导乳化油乳胶粒子的振动及计算

脉冲电场作用下,乳化油中乳胶粒子会发生长球状的伸缩振动,但目前对于粒子振动的研究较少.通过建立乳胶粒子振动的动力学模型得出粒子的非线性参激振动方程,对振动阻力和恢复力系数进行函数逼近处理,运用谐波平衡法对振动方程进行计算,得到粒子振动的一次近似解以及幅频特性曲线.数值实验表明,粒子振幅的一次近似解与振动方程的四阶Run...     

潜艇对空投鱼雷的防御模型研究

由于空投鱼雷入水点距离潜艇较近,潜艇单靠机动规避摆脱鱼雷跟踪比较困难。针对空投鱼雷的特点,提出了使用噪声干扰器和自航式声诱饵规避敌方鱼雷的对抗方案,分析了噪声干扰器和自航式声诱饵的使用方法并建立了噪声干扰器干扰模型和自航式声诱饵发射扇面模型。通过仿真计算表明:采用本模型确定噪声干扰器和自航式声诱饵的使用方法是可行的。     

声自导雷平行齐射发现概率解析计算模型

为了准确快速地评估声自导鱼雷平行齐射的作战效能（发现概率）,从鱼雷、目标的相对运动入手,将目标位置及运动随机误差转移到鱼雷航向上;如此建立了计算声自导鱼雷平行齐射发现概率的一重积分解析模型（不考虑鱼雷航行性能误差）和四重积分解析计算模型（考虑鱼雷航行性能误差）。最后以统计模型为标准来验证两个解析模型的正确性。仿真结果显示,对于90%左右的考察态势,解析模型与统计模型的结果差的绝对值在1%之内,另外10%左右的考察态势,也在1%-3%之间。从而验证了所建解析模型的正确性和可行性。     

邻域加强的并行子空间优化过程

针对基于响应面的并行子空间优化(CSSo-RS)过程的不足,提出了基于邻域加强的改进CSSO-RS优化过程.其主要思路是在子空间优化后,在得到的最优解附近进行全部变量的优化,以更好地协调系统级优化与子空间优化.用经典测试函数及通用航空飞机参数优化问题对该算法进行测试,测试结果表明该算法使CSSO-RS优化效率得到较大的...     

汉语语境下教师对学生冲突性话语的回应策略与面子的语用分析

师生间的言语冲突在课堂教学中时有发生,而这一现象并未引起足够重视。课堂教学中师生间冲突性话语为本文的研究对象,分析其语言表现,并依据Brown&Levinson的面子威胁论,探析教师对于学生不合作话语引发的冲突回应,旨在揭示师生间冲突性话语的面子威胁性特征及语用理据。     

The Intergovernmental Authority on Development's Conflict Early Warning and Response Mechanism

The Intergovernmental Authority on Development's (IGAD) Conflict Early Warning and Response Mechanism (CEWARN) 2012–2019 Strategy Framework has proposed that the CEWARN mechanism expand its conflict typologies and geographic coverage. The argument advanced in this paper is that the proposed CEWARN expansion should be welcomed. Since its establishment in 2003, CEWARN had restricted itself to dealing with cross-border pastoral conflicts among the member states. However, conceptually and legally, CEWARN was not precluded from dealing with other types of conflict. Firstly, in the past, any conflict, other than cross-border pastoral ones, had been considered by the member states as firmly within their national jurisdiction that mechanisms like CEWARN are precluded from handling. Secondly, CEWARN, which has hitherto been dependent on external donations, just does not have the requisite financial resources to expand its coverage. Thirdly, and most importantly, governments often know the imminence of some, if not all, of the conflicts because they cause them. Thus, they are not interested in reacting to them. In the end, the paper concludes that the proposal to expand CEWARN's conflict portfolio and geographic spread may just remain that – a proposal.     

Deterrence of Nuclear Terror

Nuclear proliferation, lax security standards in the storage of fissile materials, and international apathy in the prosecution of terrorists make nuclear terror a serious threat to the United States and its allies, yet no doctrine of retaliation has been established. To decrease the probability of terrorist use of nuclear weapons, a doctrine of retaliation—a negligence doctrine—should be considered. If the United States can distinguish whose fissile material was used for a nuclear terror event, a negligence doctrine would prescribe retaliation against that state. Where the proximate cause—terrorists—is unavailable for deterrent retaliation, deterring an accessible mediate cause—a state that has failed to adequately secure its fissile material—is one of a few effective alternatives. In the absence of such a negligence doctrine, the United States and its allies are increasingly vulnerable to a nuclear terror attack and the ensuing negative consequences.     

钢质油罐罐底腐蚀预测模型研究与评价

钢质油罐在储存油料时不可避免地会受到严重腐蚀.为能够掌握罐底的腐蚀程度,提出了一种由灰色系统理论和BP人工神经网络相结合的方法建立预测模型,对钢质油罐罐底腐蚀情况进行了预测,并通过实例计算给出了评价.计算结果表明,预测值与实测值相差很小,尤其对油料腐蚀这种涉及较多因素的复杂过程,该方法具有明显的优越性;该模型克服了传统预测模型需建立函数的难题,且预测精度较高,具有较高理论与实际应用价值.