基于AT89S52单片机电阻炉炉温控制系统

根据热处理炉温控制的特点和要求,设计了基于AT89S52单片机的智能化电阻炉温度控制系统,解决了炉温较大波动的问题,实现了无纸化记录热处理过程及参数,降低了热处理生产劳动强度。     

“个体乳酸阈”与“无氧阈”术语之比较

本文通过参阅大量的文献资料，对“无氧阈”与“个体乳酸阈”两个术语进行了比较、分析，同时论述了“无氧阈”术语之不足，提出了以“个体乳酸阈”一词替代“无氧阈”一词。     

实现Authorware与MCS-51系列单片机的多机通讯

通过实例详细介绍了Authorware与单片机进行多机通讯的原理和方法，既有硬件原理图，又有程序清单，具有一定的实用价值．     

Genetic Polymorphism of Angiotensin II Type 1 Receptors and Their Effect on the Clinical Outcome of Captopril Treatment in Arab Iraqi Patients with Acute Coronary Syndrome (Mid Euphrates)

Genetic variation in the angiotensin II type 1 receptor (AT1R) has an important effect on the outcome of acute coronary syndrome (ACS) initiated treatment with captopril. This study aims to investigate the impact of genetic polymorphism of AT1R (rs5186 and rs275651) on the ACS outcome in Iraqi patients treated with captopril. A total of 250 Iraqi individuals with ACS were included in this case—control study and they were divided into two study groups; Study group 1 included 125 participants who were prescribed captopril, 25 mg twice daily and study group 2 included 125 participants who received no captopril as part of their ACS treatment (control study). The AT1R gene (rs5186) CC genotype was found to be associated with ST-elevation myocardial infarction (STEMI) (Odd’s ratio (O.R) = 1.2, P = 0.7), while AC was associated with Non-ST-elevation myocardial infarction (NSTEMI) and unstable angina (UA) (O.R = 1.2, P = 0.8). AC genotype is more prone to have Percutaneous coronary intervention (PCI) after ACS attack (O.R = 1.2, P = 0.6). CC genotype had a risk to get less improvement (O.R = 1.6, P = 0.5), so might require higher doses of captopril during acute coronary insult. The AT1R gene (rs275651) AA genotype was associated with UA (O.R = 1.3, P = 0.9). AA and AT genotypes were more prone to have PCI after ACS attack (O.R = 3.9 P = 0.2, O.R = 3.5, P = 0.3 respectively) and thus requiring higher doses of captopril. We conclude that the AT1R rs5186, rs275651 genetic polymorphisms might partially affect the clinical outcome of ACS patients treated with captopril and might have captopril resistance which requires higher doses.     

鞭天线车载倒伏系统的设计与实现

设计了由处理器模块、按键与显示模块、电机驱动模块、码盘计数模块、通信模块、状态记忆模块构成的鞭天线车载倒伏系统.它的电控部分以STC89S52单片机为控制核心,以电机驱动减速机设计天线倒伏控制器执行机构.经过测试,系统能够适应各种天气环境,控制精度较高,工作稳定.     

基于恒温炉智能模糊PID控制器设计

本文设计了恒温炉控制系统,恒温控制系统主要由单片机控制与PID控制器实现电热炉自动加热并维持一个恒定值.系统由AT89C51为主的几个模块组成.其中晶体振荡电路主要是向AT89C51提供基准时钟,信号源由DS18B20温度传感芯片提供,键盘设定炉温期望值,单片机输出信号控制开关,实现电热炉加热,并附有显示.     

用单片机实现交通灯的控制

单片机交通灯系统的研制,一方面可以改善交通堵塞问题,疏导车流,提高道路利用率;另一方面可以节省交通警力,提高效率.论述了系统的硬件结构原理及软件设计思路.测试结果表明设计的交通信号灯系统性能稳定,功能强,便于实现城市交叉口单点控制.     

基于GT-DRIVE的AT车匹配仿真研究

根据AT车动力学方程,在GT-DRIVE6.1.0环境下建立某B级5AT整车模型,并仿真计算不同变矩器和主减速比下整车动力性、经济性的方法。建模仿真过程不仅为该B级车的选型和匹配提供了依据,对AT车的匹配研究也有借鉴意义。     

EMGFT评定无氧阈的可行性研究

运用Matsumoto测定EMGFT的方法对青少年足球运动员EMGFT进行测试,目的在于验证肌电阈稳定性;检验EMGFT与LAT、VAT、HRT的相关性;探讨EMGFT无损伤测定无氧阈方法的可行性。方法:递增负荷实验确定LAT、VAT、HRT;肌电阈实验确定EMGFT。结果:EMGFT稳定性实验,两次均值分别为151.08±10.52 W、153.56±12.93 W,r=0.95(P<0.001),组间无显著性差异(P>0.05);以VO2为参数,EMGFT、LAT、VAT、HRT均值分别为2481±463ml/min、2507±501ml/min、2580±474ml/min、2610±517ml/min,EMGFT分别与LAT、VAT、HRT相关性检验r=0.97(P<0.001)、r=0.91(P<0.001)、r=0.76(P<0.05),配对样本t检验P>0.05、P>0.05、P<0.05;以功率为参数,EMGFT、LAT、VAT、HRT均值分别为157±20 W、158±20 W、162±21 W、162±26 W,相关性检验r=0.96(P<0.001)、r=0.93(P<0.001)、r=0.71(P<0.05),配对样本t检验P>0.05、P>0.05、P<0.05。结论:应用Matsumoto肌电无氧阈方法能很好地确定EMGFT,稳定性较好;EMGFT与LAT、VAT呈高度相关,出现时间顺序依次为EMGFT→LAT→VAT,EMGFT略早于LAT和VAT,呈一定的规律性,表明EMGFT可以用于检测无氧阈,具有无损伤、简单、易测等优点;HRT检测无氧阈不稳定,说明HRT不宜作为无氧阈的评定指标。