常态化推进部队作战训练成果进课堂途径探究

为落实新时代军事教育方针为战育人要求,增强以战领教意识,不断提升军事教育实战化水平,分析了常态化推进部队作战训练成果进课堂现阶段存在的问题,从深化对常态化推进部队作战训练成果进课堂的认识、健全部队作战训练成果进课堂的途径机制和加强部队作战训练成果进课堂的转化运用三方面提出了解决问题的途径,给出了实施效果.     

基于SWT的GIS电压互感器二次侧干扰分析

特快速暂态过电压（VFTO）是气体绝缘变电站（GIS）中切换隔离开关时产生的特殊电磁暂态现象。VFTO会以传导和辐射方式影响二次设备的正常运行。为探究VFTO对二次设备的干扰特性,文中采用自制的二次侧干扰测量装置对某1 000 kV GIS的电压互感器（PT）二次侧共模干扰进行现场实测。接着,对比了5种时频分析方法的性能,采用其中性能较优的同步压缩小波变换（SWT）对实测波形进行了时频分析。实测结果表明：PT二次侧的共模干扰电压峰峰值最高可达9.65 kV。微脉冲的时频分析结果表明：7.8 MHz频率分量幅值高,且贯穿波形的始终,是PT二次侧干扰的主导频率分量。该分析结果可为GIS中二次设备的电磁抗扰度测试和电磁防护设计提供参考。     

Modelling of plastic flow, heat transfer and microstructural evolution during rolling of eutectoid steel rods

A study was undertaken in an attempt to quantitatively describe the rolling process of eutectoid steel rods. Finite element method was employed to model plastic flow and heat transfer in the deformed material, and heat transfer during cooling to ambient temperature. The numerical calculation gave an assessment of the strain, strain rate and temperature distributions in the work piece. This allowed the prediction of the austenite microstructure evolution during the process. Finally, the relationships describing the microstructure-mechanical properties were used to quantitatively characterize the influence of processing parameters on strength of rods after rolling.     

一种交流阻抗和弱极化相结合的腐蚀速度测量方法

提出了交流阻抗和弱极化技术相结合的腐蚀速度测量的方法，并依此研制了CMB-4510腐蚀速度测量仪.有效地解决了线性极化技术因估算塔菲尔系数所带来的理论误差，进一步消除了因介质电阻IR降的影响产生的测量误差.结果表明，CMB-4510腐蚀速度测量仪测得的几种体系的腐蚀速度、极化电阻以及介质电阻与M398所测得结果相同；测量缓蚀剂的缓蚀效果与挂片失重法的测试结果完全吻合.     

Thermal activation approaches to deformation mechanisms for high Nb containing TiAl base alloys

The deformation mechanisms in a wide temperature rnage from room temperature to 1200K were investigated by thermal activation approach.Using observed instantaneous stress response to the strain rate jump (Δσtr),the activation volume Vs,then the activation enthalpy ΔH,activation free enthalpy ΔG and activation entropy ΔS were calculated.The apparent activation energy of high temperature deformation is estimated to be 3.66eV,which is larger than the self-diffusion coefficient of binary TiAl(3.01eV).The dislocations at 1173K are generally curved or bowed,even helical-shaped dislocations.The climb of ordinary dislocations as well as twinning has grealty contributed to the plastic deformation.The CRSS at 1173K is estimated to be 180MPa.The higher resisting stress at both room temperature and elevated temperature might relate to the high Nb content of the alloy.     

一种新的变轴数控机床标定方法

本文论述了国内外并联数控机床所采用的标定方法，选择了序列法进行了标定试验。但在实际标定过程中，出现了部分数据误差较大的问题，本文针对所面临的问题，提出了数值逼近法，并应用到实际机床的标定中，获得了机床的相关参数。之后，通过数学模型的计算值和实际测量值对比，验证了数据的可靠性，从而验证了方法的可行性和正确性。     

Prediction of particle motion in a two-dimensional bubbling fluidized bed using discrete hard-sphere model

The solids motion in a gas-solid fluidized bed was investigated using a discrete hard-sphere model. Detailed collision between particles and a nearest list method are presented. The turbulent viscosity of gas phase was predicted by subgrid scale (SGS) model. The interaction between gas and particles phases was governed by Newton's third law. The distributions of concentration, velocity and granular temperature of particles are obtained. The radial distribution function is calculated from the simulated spatio-temporal particle distribution. The normal and shear stresses of particles are predicted from the simulated instantaneous particle velocity. The pressure and viscosity of particles are obtained from both the kinetic theory of granular flow and the calculated stresses of particles. For elastic particles the individual lateral and vertical particle velocity distribution functions are isotropic and Maxwellian. The observed anisotropy becomes more pronounced with increasing degree of inelasticity of the particles.     

基于有限时间跟踪微分器的迭代学习控制

针对迭代学习控制（Iterative learning control,ILC）中的初始状态问题,提出了采用有限时间跟踪微分器安排过渡过程方法,根据迭代学习控制中期望轨迹已知的特点,设计了其参数有明显物理意义并且调节方便的有限时间跟踪微分器. 在此基础上,针对一类具有不确定性的非线性时变系统的迭代学习控制问题,提出了具有对不确定项进行估计的迭代学习控制算法,并应用类Lyapunov方法给出了相关定理证明. 仿真结果表明所提出的方法是有效的.     

二苯基甲烷二异氰酸酯生产技术及发展

综述了二苯基甲烷二异氰酸酯(MDI)光气法生产中在连续缩合、MDI提纯和降低产品色度等方面的研究;MDI非光气法生产中合成苯氨基甲酸甲酯(MPC)所用催化剂,合成亚甲基二苯基氨基甲酸甲酯(MDU)所用催化剂、甲基化试剂和溶剂,MDU热分解或催化分解制备MDI所用催化剂和溶剂等方面的研究。光气法生产工艺存在固有的缺点,氨基甲酸酯分解法的非光气法生产工艺是MDI生产的研究新热点。     

Developing human factors/ergonomics as a design discipline

This paper deals with internal challenges that the human factors/ergonomics (HFE) research faces when wishing to strengthen its contribution to development of work systems. Three established characteristics of high-quality HFE, i.e., HFE takes a systems approach, HFE is design-driven, and HFE focuses on two closely related outcomes, performance and well-being, are taken as a starting point of a methodological discussion, in which conceptual innovations, e.g. adopting the technology-in-use perspective, are proposed to support development of HFE towards the high-quality aims. The feasibility of the proposed conceptual choices is demonstrated by introducing a naturalistic HFE analysis approach including four HFE functions. The gained experience of the use of this approach in a number of complex work domains allows the conclusion that becoming design-driven appears as that most difficult quality target for HFE to reach. Creating an own design discipline identity in a multi-voiced collaboration is the key internal challenge for human factors/ergonomics.