基于盒维数的锚杆工作荷载无损检测研究

为研究锚杆工作荷载,应用了分形理论中的盒维数方法。根据一维杆波动理论,在锚杆外露端头安装一个自激式加速度传感器,利用锚杆无损检测加载试验台分级加载、检测标定测得锚杆-围岩相互作用体系在激发荷载作用下的速度响应,计算其加速度响应曲线的盒维数,拟合得出荷载-盒维数曲线,直观地判断锚杆工作荷载和锚固质量。     

井下抽油泵柱塞与泵筒运动规律的研究

用三元振动模型,综合考虑油柱、抽油杆柱和油管柱的振动.建立起数学模型并离散化,然后用微机编程求解微分方程组.对不同工况下的抽油泵运动规律和抽油机示功图进行分析研究,得出了油管应予锚定的结论,并给出了不同抽油机的适用范围.为进一步研究抽油泵的井下工作机理和故障原因打下了基础.     

长春市民办高校与公立高校体育科研现状对比研究

采用文献资料法、数理统计法、比较法对吉林省民办高校和公立高校体育教师的科研现状进行比较分析,比较二者不同年龄、学历、职称的教师发表论文状况,分析二者的科研学术氛围及科研条件,旨在了解长春市两类高校的体育科研的现状,为长春市高校体育科研水平的提高提供参考。     

基于多元时间序列融合的飞行动作识别方法

针对飞行动作数据随机性强与长度不一致的问题,提出通过减小动态时间规整(DTW)算法的搜索空间,并定义不同特征参数贡献度的概念,实现对飞行数据的多元时间序列融合,从而完成对战术机动动作的识别。通过引入预分类和细分类结合的方式,对动作数据进行预处理,然后根据改进的动态时间规整(WDTW)算法对待测数据进行识别。仿真实验表明,相比传统DTW算法,WDTW算法通过降低算法复杂度,识别计算时间变化明显;对核密度与精准度系数的分析表明识别准确率亦有所提高。实验结果验证了所提方法的准确性。     

Homology Priority Task Scheduling in μC/OS-Ⅱ Real-Time Kernel

μC/OS-Ⅱ is an open source real-time kernel adopting priority preemptive schedule strategy. Aiming at the problem of μC/OS-Ⅱ failing to support homology priority tasks scheduling, an approach for solution is proposed. The basic idea is adding round-robin scheduling strategy in its original scheduler in order to schedule homology priority tasks through time slice roundrobin. Implementation approach is given in detail. Firstly, the Task Control Block （TCB） is extended. And then, a new priority index table is created, in which each index pointer points to a set of homology priority tasks. Eventually, on the basis of reconstructing μC/OS-Ⅱ real-time kernel, task scheduling module is rewritten. Otherwise, schedulability of homology task supported by modified kernel had been analyzed, and deadline formula of created homology tasks is given. By theoretical analysis and experiment verification, the modified kernel can support homology priority tasks scheduling, meanwhile, it also remains preemptive property of original μC/OS-Ⅱ.     

水下机器人自主控制系统的设计与实现

水下机器人(简称AUV)的自主控制系统起着相当于人类"大脑"的作用,它是AUV的核心技术。本文在QNX操作系统下利用多线程技术设计并实现了AUV自主控制系统。介绍了AUV混杂系统结构和自主控制原理,给出了自主控制系统的多线程结构。设计了多线程同步模块,并与QNX消息传递机制相结合实现了AUV自主控制系统线程间的同步与通信。最后在半实物仿真平台上结合具体案例对自主控制系统进行了验证。仿真结果表明AUV自主控制系统能够正确协调各个线程自主完成使命。     

The Difference of the Pulmonary-Artery Pressure of the Migrants from Difference Elevation at the 4636 - 4907 m Altitude

Study Objective： To compare and analyze the changes of the pulmonary-artery pressure of the migrants coming from different elevation in the hypoxic environment of 4636 - 4907 m extreme altitude. To explore the susceptibility to hypoxic pulmonary-artery hypertension （PH） in the subjects from different altitude and profession. Methods： By using Color Doppler Ultmsonography （CDU）, measuring the pulmonary-artery pressure of 207 healthy men, who had continuously being lived and worked at the extreme altitude for more than six months, and then were divided into three groups according to their profession and the altitude of original living place. Results： There was a significant difference in the outcomes of pulmonary-artery pressure from the 3 groups. Conclusions： Altitude of original living place, labor intensity are some of factors that impact the pulmonary-artery pressure of the people who exposure to a hypoxic environment. The pulmonary- artery pressure of person without strenuously physical work experience was more sensitive to hypoxic surroundings than that of labor workers. It was not always the fact at an extreme altitude that the moderate altitude mountaineers were superior to other migrants from a lower altitude or plain. The higher PH was found in the groups of the moderate altitude mountaineers and labor workers. It is unlikely certain that one with PH would surfer from HAPE.     

代数方法在C语言图形打印问题中的应用

介绍了C语言程序设计中的难点问题——图形打印问题的解决方案，详细论述了如何利用代数方法来解决这一双重循环问题的具体措施。     

体操运动员技术风格个性化形成的主要影响因素

根据运动员的成才特点，阐述了科学选材、运动训练及教练员执教能力对形成运动员技术风格个性化过程中所起的作用。     

《资本论》与按生产要素分配--对马克思分配理论的再认识

长期以来，我国理论界一直认为，马克思从价值创造决定价值分配的前提出发批驳了萨伊的“三位一体”的公式。因此，马克思对按生产要素分配的思想是加以否定的。然而，笔者认为，马克思在《资本论》中却清楚地阐明了在市场经济条件下的按生产要素分配的合理性。