镍基非晶态及晶态钎料真空钎焊时母材溶解模型特性的研究

以楔形变钎焊间隙试样为对象，研究了采用Ｎｉ８２Ｃｒ７．５Ｓｉ４．５Ｂ３Ｆｅ３成分的镍基非晶态及晶态钎料真空钎焊１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢时液态钎料对固态母材的溶解，建立了高温钎焊时母材溶解厚度（溶解深度）定量计算的物理－数学模型。平行等间隙及楔形变间隙试样真空钎焊试验结果表明，钎焊温度钎焊保温时间及钎焊间隙等参数对母材溶解有重要影响，并表明该模型具有较高的准确性，能够用于研究高温钎焊时钎料对母材的溶解特性，并进行溶蚀性评价。     

航天飞机最优空间机动轨道

本文对最优空间机动轨道现有的主要研究成果、研究的基本方法及有关结果作了综合评述,并指出有待解决的问题及研究方向。     

容栅传感器不确定度初步分析与计算

初步分析了引起容栅传感器测量不确定度的几个主要因素，在实验测试和生产实际相结合的基础上，对动栅、定栅、基尺、表面贴面和粘接剂的不确定度进行定量分析和估计，通过不确定度合成，计算结果与实际情况比较接近。     

The energy release of substorm and magnetic storm: Its present state and future improvements by KuaFu mission

Considering the KuaFu mission, state of the energy release of substorm and storm is simply presented and it’s improvements by KuaFu mission are investigated. The KuaFu mission will provide us an opportunity to improve our understanding of the energy release during the storm and the substorms. The two KuaFu-B satellites flying in 180° phase-lagged formation in a polar orbit will allow synoptic observations of the auroral oval, central plasma sheet, ring current and other regions. It can monitor the polar region 24/7 continuously. The advantage of the KuaFu mission is to provide the data during all phases of storm and substorm time that can be used to study the global energy release during all phases continuously. The data from auroral imager and other in-situ instruments on board KuaFu-B can be used to study the auroral dynamics and Joule heating during a storm and substorm. The data from the neutral atom imager instrument can be used to study the dynamics and the energy release in the ring current region from sudden commencement to complete storm recovery. Furthermore the data from KuaFu-A, which is around L1 point, can be used to study the interplanetary conditions along with the data from the plasma sheet to study the triggering process and energy release during a substorm. So, KuaFu mission with its continuous time monitoring facilities would enable us to make much progress towards solving the underlying problems.     

计算机辅助飞机结构RCMA

提出了一种简明通用的计算机辅助飞机结构以可靠性为中心的维修逻辑决断分析（ＲＣＭＡ）方法。给出了定性和定量两种评级系统,建立了结构项目评级号与检查周期的对应关系,阐明了计算机辅助结构ＲＣＭＡ的程序流程,并给出了运行实例。     

平面叶栅内气-固两相流场的高速摄影

两相流中以球形阳离子交换树脂(平均直径d_p=600μm)为固体粒子,其在流场中运动轨迹基本上是直线。粒子末与壁面碰撞时粒子最终速度可达来流速度的40％～60％。碰撞后速度下降,碰撞后与碰撞前速度之比与入射角β_1有关。通过实验数据拟合得到U_(p2)/U_(p1)=1.0+0.166β_1-1.293β_1~2+0.689β_1~3-0.00329β_1~4。该式与他人结果有差别,说明模拟实验需进行相似理论分析,以选择适当的粒子。     

CK－lM无人机双发助推试验研究

论述了ＣＫ－１型无人机闭锁力的确定、双发助推器的同步性及其投放特性,经试飞表明,闭锁力确定合理,双发助推器同步性良好,投放安全。     

一个新的实时光学图像识别系统

本文描述了一个新的实时光学图像识别系统。该系统主要是激光二极管、多换能器声光器件、电荷耦合器件以及光学透镜组成的。这个系统既不需要相干光输入图像,也不需要基准图像的付氏变换金息图。不同波段成像系统输出的实时视频图像信号和事先记录的或实时截获的基准图像均可施加给本系统。文中给出了理论分析以说明工作原理。实验结果证实这种非相干光相关器具有完成实时图像识别的能力。事实上,某些图像识别任务碰到的图像位移、尺寸、旋转不变性问题,本系统可容易地予以解决。     

玄武岩纤维及其格栅布对超高性能水泥基复合材料力学性能的影响规律

通过大掺量超细工业废渣及采用普通工艺成功制备了3类超高性能水泥基复合材料,分别测试了其7,28,90 d的抗压强度和抗折强度,并对其进行了分析。讨论了玄武岩纤维及玄武岩纤维格栅布对其力学性能的影响,并对其弯曲荷载-挠度曲线进行了分析。结果表明,玄武岩纤维体积掺量为0.5%~1.5%时可以提高混凝土的抗折强度和抗压强度,但提高幅度有限,而玄武岩纤维格栅布对提高复合材料的力学性能有明显的效果,表现出良好的增强增韧效果。     

Rotor Airload and Acoustics Prediction Based on CFD/CSD Coupling Method

An advanced airload and noise prediction method based on computational fluid dynamics/computational structural dynamics(CFD/CSD)coupling for helicopter rotor has been developed in this paper.In the present method,Navier-Stokes equation is applied as the governing equation,and a moving overset grid system is generated in order to account for the blade motions in rotation,flapping and pitching.The blade structural analysis is based on 14-DOF Euler beam model,and the finite element discretization is conducted on Hamilton′s variational principle and moderate deflection theory.Aerodynamic noise is calculated by Farassat 1 Aformula derived from FW-H equation.Using the developed method,numerical example of UH-60 Ais performed for aeroelastic loads calculation in a low-speed forward flight,and the calculated results are compared with both those from isolated CFD method and available experimental data.Then,rotor noise is emphatically calculated by CFD/CSD coupling method and compared with the isolated CFD method.The results show that the aerodynamic loads calculated from CFD/CSD method are more satisfactory than those from isolated CFD method,and the exclusion of blade structural deformation in rotor noise calculation may cause inaccurate results in low-speed forward flight state.