机载雷达天线夹层结构的等效分析

为便于机载雷达天线的动力学分析，由夹层结构的力学特性，提出了用单层结构等效夹层结构的方法，该不仅可用于夹层结构的动力学分析，而且可用于工程中类似结构。     

基于内力削峰与变形等值的双向板等效荷载确定方法的比较

根据板壳理论中集中荷载与均布荷载作用下四边简支板的重三角级数解，按照变形等值和弯矩削峰内力等值原则确定双向板等效荷载，据此编制程序，分析板跨变化对等效荷载值的影响，找出两种计算方法确定等效荷栽取值的变化规律，据此合理布置板跨，达到安全、经济的目的。     

从功能对等理论角度分析军事话语英译的特点——以《国防白皮书：中国武装力量的多样化运用》为例

在翻译军事话语时尤其需要注意对等，不仅由于军事话语独有的文体特色，更因为其具有很强的政治性和专业性。如果能够做到对等，就可以避免错译误译，而且能使译文具有更强的军语风格。《国防白皮书：中国武装力量的多样化运用》就是一个结合军事话语特点的典范蓝本，充分体现出娴熟雅致的翻译技巧，是对功能对等理论的准确阐释。     

Einstein׳s Equations for Spin 2 Mass 0 from Noether׳s Converse Hilbertian Assertion

An overlap between the general relativist and particle physicist views of Einstein gravity is uncovered. Noether׳s 1918 paper developed Hilbert׳s and Klein׳s reflections on the conservation laws. Energy-momentum is just a term proportional to the field equations and a ‘curl’ term with identically zero divergence. Noether proved a converse “Hilbertian assertion”: such “improper” conservation laws imply a generally covariant action.Later and independently, particle physicists derived the nonlinear Einstein equations assuming the absence of negative-energy degrees of freedom (“ghosts”) for stability, along with universal coupling: all energy-momentum including gravity׳s serves as a source for gravity. Those assumptions (all but) imply (for 0 graviton mass) that the energy-momentum is only a term proportional to the field equations and a symmetric “curl,” which implies the coalescence of the flat background geometry and the gravitational potential into an effective curved geometry. The flat metric, though useful in Rosenfeld׳s stress-energy definition, disappears from the field equations. Thus the particle physics derivation uses a reinvented Noetherian converse Hilbertian assertion in Rosenfeld-tinged form.The Rosenfeld stress-energy is identically the canonical stress-energy plus a Belinfante curl and terms proportional to the field equations, so the flat metric is only a convenient mathematical trick without ontological commitment. Neither generalized relativity of motion, nor the identity of gravity and inertia, nor substantive general covariance is assumed. The more compelling criterion of lacking ghosts yields substantive general covariance as an output. Hence the particle physics derivation, though logically impressive, is neither as novel nor as ontologically laden as it has seemed.     

与图■色等价的图(英文)

在这篇论文中,应用伴随多项式的性质,特征标和最小实根,在n≠3k+2,m≠3k+2并且m≠5k+3的条件下,刻画出了所有和图■色等价的图.     

随机变量线性组合的封闭性

用“ｄ”↓＝运算定义了随机变量的等价类，给出了随机变量线性组合封闭性的概念，得到了以下结果：线性组合封闭的特征；任何一个等价类中可选择该类中的随机变量线性组合不属于该类，可选择非等价中的随机变量性组合属于该等价类，并给出了上述结论的构造方法。     

带连续系数的BDSDE解的惟一性与连续依赖性的等价

证明若BDSDE中的漂移项系数f=f(t,y,z)关于变量y和z连续且有线性增长,则方程解的惟一性与解关于系数f和终端值ξ的连续依赖性是等价的。     

DG范畴中性质（I）的极限调整理论

三角结构是DG范畴的重要内容,其中,同伦极限理论是讨论三角结构的有力工具.一个DG模具有性质（P）指的是它具有被3个条件限制的特殊的filtration,但是其中极限过程这一条件可以被一个更为简洁的条件所取代,Keller证明了DG范畴中性质（P）的极限调整定理.文章首先证明了从具有性质（I）的DG模I出发能得到H A...     

The complexity of variable minimal formulas

Based on the common properties of logic formulas: equivalence and satisfiability, the concept of variable minimal formulas with property preservation is introduced. A formula is variable minimal if the resulting sub-formulas with any variable omission will change the given property. Some theoretical results of two classes: variable minimal equivalence (VME) and variable minimal satisfiability (VMS) are studied. We prove that VME is NP-complete, and VMS is in D^P and coNP-hard.     

逆P-集合

利用P-集合(Packet sets),提出逆P-集合(Inverse packet sets),给出逆P-集合的结构;逆P-集合记作P-1-集合。P-1-集合是P-集合的对偶形式。P-1-集合是由内P-1-集合X珔F(Internal inverse packet set X珔F)与外P-1-集合X珔F珔(Outer inverse packet set X珔F珔)构成的集合对;或者(X珔F,X珔F珔)是P-1-集合;P-1-集合具有动态特征。给出P-1-集合的分离定理与P-1-集合的动态等价类特性,给出P-1-集合在动态信息系统中的应用。