一种新型汽车底盘外检用地沟小车研究

介绍一种用于汽车检测线的汽车底盘外检辅助装置。该装置使用电机驱动,能够承载体重为110 kg以内的检测人员上下升降和沿轨道水平移动,达到能方便检查汽车底盘外观安全状况的目的;该装置上还设有工具平台,用于放置检测工具和将检测结果以无线传输给上位机的触摸式平板电脑。     

夏大豆提取蛋白质的组分及其亚基组构成变异分析

选取在山东省济宁地区大豆产区曾经或正在生产上推广使用的35个品种为供试品种．采用SDS-PAGE电泳技术测定提取蛋白质11S组分、7s组分、亚基组和亚基的相对含量以及亚基数量．研究其变异特点．在济宁地区同一条件下的结果表明：（1）1IS和7s组分的亚基总数变异范围为15-23个,平均为18．03个．7s组分亚基数量变异范围为3-7个,平均4．49个,有5个亚基组存在不同程度的缺失．11S组分亚基数量变异范围为11-19个,平均13．54个,没有亚基组缺失现象．（2）7s组分相对含量的变异范围为14．78-27．54％,平均为22．07％;11S组分的变异范围为49．04-63．52％,平均为59．77％．11S／7S比值变异范围为2．12-4．11,平均为2．77．（3）7s组分6个亚基组的相对含量平均为4．38-6．62％,11S组分4个亚基组平均相对含量为7．02-21．72％．（4）7s组分相对含量与11S组分之间有微弱的正相关（r=0．08）,7S组分相对含量与11S／7S比值之间存在极显著的负相关（r=-0．94）．而11S组分相对含量与11S／7S比值之间存在微弱的正相关（r=0．19）．7s的6个亚基组中相邻的2个亚基组之间都存在显著或极显著的负相关（r=-0．38--0．85）．11S组分的相邻亚基组之间存在负相关关系（r=-0．78--0．95）,不相邻的亚基组之间相关关系微弱．     

Indirect measures of substrate utilisation following exercise-induced muscle damage

Abstract

This study investigated whether exercise-induced muscle damage (EIMD) resulted in changes to whole-body substrate utilisation during exercise performed during the subsequent 48 hours. Eight males (31±6 years) performed 30 minutes of bench-stepping exercise. One leg performed eccentric contractions (Ecc) by lowering the body whilst the control leg performed concentric contractions (Con) by raising the body. On the two days following bench-stepping exercise participants performed measures of muscle function on an isokinetic dynamometer and undertook a bout of one leg cycling exercise, at two differing workloads, with the first workload (WL1) at 1.5±0.25 W/kg and the second workload (WL2) at 1.8±0.25 W/kg with each leg. Expired respiratory gases were collected during cycling to estimate whole body substrate utilisation. There were significant decrements in measures of muscular performance (isometric force, concentric and eccentric torque) and increased perception of soreness in Ecc compared with Con (P < 0.05). The effect of the Ecc treatment on substrate utilisation during one-legged cycling revealed a significant trial×time interaction with higher rates of CHO oxidation in the Ecc condition compared with Con that were further increased 48 hours later (P = 0.02). A significant treatment×time×effort interaction (P < 0.01) indicated the effect of the treatment altered as workload increased with higher rates of CHO oxidation occurring in WL2. This is consistent with greater reliance upon muscle glycogen. Suggesting that in EIMD, reductions in strength and increased feelings of soreness can be associated with greater reliance upon intramuscular CHO oxidation, than lipid, during subsequent concentric work.     

The respiratory time and flow profile at volitional exercise termination

Abstract

In this study, we examine the effect of exercise on the time and flow characteristics of the respiratory cycle profile at the point of volitional exercise termination. Eight males (mean age 29 years, s = 10; body mass 74 kg, s = 7; height 1.75 m, s = 0.04) undertook a cycle test to volitional exhaustion on a cycle ergometer, which allowed peak oxygen uptake ([Vdot]O_2peak) to be measured (mean 51 ml · kg^?1 · min^?1, s = 7). At a later date, two sub-maximal tests to volitional exhaustion were completed in a random order at 76% (s = 6) and 86%[Vdot]O_2peak (s = 7). As expected, the magnitude of the respiratory flow and time characteristics varied with the three exercise intensities, as did the point of exercise termination and terminal ventilation rates, which varied from 7 to 27 min and 112 to 132 litres · min^?1 respectively. More importantly, however, at exercise termination some of the characteristics were similar, particularly the breathing frequency (at termination 49 breaths · min^?1), the ratio between inspiration and total breath time (0.5), and the later occurrence of peak inspiratory flow (0.24 – 0.48 s). The coincident unity of these time and flow profile characteristics at exercise termination illustrates how the integration of timing and flow during breathing influence exercise capacity in non-elite athletes.     

关于高校班级规模的调查分析

对某省七所高校班级规模的统计分析发现:该省高校班级规模很大,平均为65.91人;不同类型高校之间的班级规模由大到小依次排列是:新建高校、一般高校、重点高校、专科学校;不同高校之间的班级规模和不同课程之间的班级规模大多存在非常显著的差异。为此,针对当前因高校班级规模过大而影响课堂教学效果和教学质量的状况,教育行政管理部门要加强对高校班级规模的干预,高校也要努力适当缩小班级规模,更为重要的是,教育行政管理部门、高校特别是高校教师要在班级规模短期内难以控制的情况下,研究和探讨保障和提高课堂教学质量的对策。     

基于3G网络视频传输的一种QoS控制方法

针对3G网络视频传输,提出一种应用层的服务质量（quality of service,QoS）控制方法. 该方法采用线性预测算法计算丢包率,并引入严增松减等步长拥塞控制算法对视频输出码率进行自适应调节. 实验结果表明,端到端延迟时间和延迟时间抖动等QoS控制参数均符合通信行业对实时业务的指标要求,同时网络利用率也得以提高. 该QoS控制方法适用于3G网络视频传输,具有良好的可行性和实用性.     

无线传输多点温度测量在发电机局部放电检测中的应用

为了提高对发电机局部放电恶劣环境生产条件下的温度监控,研制一套应用于恶劣环境条件下的无线远程的温度检测系统．该系统采用以STC89LE52单片机作为控制核心,通过无线接收模块接收远程多点温度采集发送系统检测的多点温度值,并传输到上位机显示．该系统结构简单,抗干扰性强,稳定性好,具有一定的实用价值．     

凤阳花鼓渡长江,泪花却比浪花多——由唱词考证凤阳花鼓在南方各地戏曲中的流变

凤阳花鼓,作为明清最为流行的歌种之一,由于传播的载体、方式、形态不同,其在向全国各地、各艺术种类传播的过程中,在各地音乐品种中不同程度地留下了凤阳花鼓的"音乐基因"。本文由唱词考证凤阳花鼓在南方各地戏曲中的流变,从音乐地理学视角浅谈民歌传播中表现出的各地民歌同宗同源的特点。     

矿井工作面透射地震层析物理模拟实验研究

透射地震CT技术应用于矿井工作面中小断层和陷落柱的探测在理论上是可行的.通过3个室内物理模型的模拟,证明透射地震CT技术能够对介质差异明显的界面反应清晰,即对模拟的煤层中小型断裂构造和高速异常体反应灵敏.因而该技术可有效地应用于矿井工作面中小断层和高速陷落柱的探测,为其在井下的实际应用提供了充分的证据.     

一种基于pci_t32的PCI传输卡的设计

介绍一种可适用于现代数字语音实验室的PCI传输卡的设计. 该传输卡集成了Altera 公司FPGA芯片,具有小型化、低成本、现场可编程和高速传输的特点. 详细介绍FPGA内部逻辑,重点分析基于pci_t32 IP 核的PCI接口的设计,并给出数据测试结果. 该卡能实现80路终端与教师的数据通信,波特率达到 270.950 4 Mbps.