关于大学生行为学建构的几点思考

研究与探索大学生的行为及其规律,对于造就与培养社会主义事业建设者和接班人,完成高等教育任务,意义重大。本文主要就大学生行为学逻辑起点、学科基础、研究对象与任务等问题进行探讨,并就如何建构大学生行为学,提出了初步构想。     

点到平面距离公式的一种新证法

该文根据球面上一点切平面的方程和平移变换,对空间任一点P(x0,y0,z0),分P点为坐标原点和P点不是坐标原点两种情形,给出了到平面π:Ax By Cz D=0的距离公式d=|Ax0 By0 Cz0 D|/√A2 B2 C2 的一种新证法.     

Abnormal growth of austenite grain of low-carbon steel

Niobium is an important alloying element for the steel. To know further the effect of Nb in the steel, the contrast experiments on the austenite grain growth of the 0.015%Nb and free Nb steels were carried out using Gleeble 1500 thermomechanical simulator. The experimental results indicate that the austenite grain of 0.015%Nb steel is finer than that of Nb free steel at 1150–1230 °C. And when the heating temperature arrives the critical temperature 1240 °C, the austenite grain of Nb steel suddenly grows up, while the austenite grain of Nb free steel changes little. Finally, the austenite grain of Nb steel is obviously coarser than that of Nb free steel. By transmission electron microscopy (TEM) using a carbon extraction replica technique, the precipitates of Nb(C,N) were not observed in the 0.015%Nb steel. It is concluded that the grain-boundary internal adsorption of Nb atoms leads to the result.     

谈谈确定"停工检测点" "质量见证点"的方法

通过制造4台我国特大型非标冶炼回转炉的实践,以详实的实例,总结性地介绍了在特大型非标设备的制造中,怎样运用技术确定“停工检测点”、“质量见证点”,完成设备制造的成功经验。     

Iterative ultrasonic signal and image deconvolution for estimation of the complex medium response

The ill‐conditioned inverse problem of estimating ultrasonic medium responses by deconvolution of RF signals is investigated. The primary difference between the proposed method and others is that the medium response function is assumed to be complex‐valued rather than restricted to being real‐valued. Derived from the complex medium model, complex Wiener filtering is presented, and a Hilbert transform related limitation to inverse filtering type methods is discussed. We introduce a nonparametric iterative algorithm, the least squares method with point count regularization (LSPC). The algorithm is successfully applied to simulated and experimental data and demonstrates the capability of recovering both the real and imaginary parts of the medium response. The simulation results indicate that the LSPC method can outperform Wiener filters and improve the resolution of the ultrasound system by factors as high as 3.7. Experimental results using a single element transducer and a conventional medical ultrasound system with a linear array transducer show that despite the errors in pulse estimation and the noise in the RF signals, excellent results can be obtained, demonstrating the stability and robustness of the algorithm. © 2006 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 15, 266–277, 2005     

宇宙主胁量限定粒子质量、微观临界尺寸和真空光速（胁量力学初导IV）

扩展到任意质量体的宇宙主胁量描述。宇宙主胁量同质量之间只差一个常量系数。宇宙主胁量创造了粒子的质量，造就了粒子的微观临界尺寸，构筑了恒定而有限的真空光速。     

圆管临界热流密度的流体模化

为了评价现有的临界热流密度(CHF)流体模化技术,在氟里昂-12热工实验装置上完成了φ202.5圆管CHF实验。在此基础上,用不同的数据源,比较了Ahmad补偿失真模型、鲁钟琪模型、Groeneveld模型和Stevens-Kirby经验比例因子模型的预测精度和适用范围,为复杂流道中的CHF流体模化研究奠定了基础。     

一个基于Linux的手持嵌入式系统

介绍了一个基于Linux的带TCP／IP联网功能和蓝牙接口的嵌入式系统的设计和实现过程，针对pppd的压缩，如何在单进程中实现多任务和用户参数访问等技术难点进行了详细分析。     

实型和虚型结构因子的代数公式

应用晶体正空间和倒易空间等效点的矩阵表示讨论结构因子类型，在得到倒易空间点的一般型结构因子类型和系统消光型结构因子类型的代数公式之后，得到并证明了倒易空间点的实型和虚型结构因子的代数公式．即满足提出的实型结构因子类型或虚型结构因子类型的代数公式的任意一倒易空间点h，其结构因子Fh分别为实型和虚型．     

宇宙演化的综述和因果链

科学、物理科学的本质是探索自然和宇宙,回答它是怎样的,为什么是这样,而不是那样;即追寻科学本身的原动力。本文亦旨在此处做尝试、探讨。