旋转开关状态检测系统设计

旋转开关状态检测系统采用减速电机通过齿轮带动六个旋转开关旋转,由电流检测电路检测负载电流,并通过分析电流变化判断旋转开关是否失效.系统通过旋转编码器与电流波形分析结果相结合的方法校准减速电机旋转的误差,并采用线性回归的方法计算出负载电流.电路中加入了锂电池备用电路,解决了系统断电时单片机的状态保持问题.     

双层桥箱内壁车辆碰撞混凝土损伤仿真研究

双层连续箱梁桥是一种新型结构体系,如何评价车辆撞击箱梁内部造成的结构损伤对于这种新型结构的广泛运用具有重要意义。通过计算机仿真技术研究各种工况下车辆对箱梁桥内壁撞击引起的结构损伤情况,得出混凝土损伤部位以及程度,分析影响混凝土损伤的敏感因子,为双层桥结构设计提供参考。     

浅析《非诚勿扰》中过度礼貌现象

礼貌理论自问世以来,取得了丰硕的研究成果,受到国内外学者的持续关注。然而礼貌理论中的过度礼貌的语言现象,即说话人有意识地打破言语交际的恰当性常规而形成的特殊话语,在已有研究中虽较少涉及但值得进行探究。该文拟从语言学、语用学角度对相亲节目《非诚勿扰》中过度礼貌的语言现象进行分析,初步揭示中文语境中过度礼貌造成的语用失误,以便提高在相亲语境中交际效率。     

电力二次设备继电保护系统失效模型研究

继电保护设备是一种重要的电力二次设备,继电保护装置分为继电保护装置本体和二次回路．文章通过对继电保护装置本体应用软／硬件失效模型进行风险评估,对二次回路应用故障树模型进行分析,建立了继电保护系统失效模型,该模型能够帮助电力自动化系统较准确地判断出系统的故障率和运行可靠性．     

伯莎为何会“疯”?——论《藻海茫茫》女主角身份认同失败问题

《藻海茫茫》因其特有的后殖民色彩而备受读者和批评家的关注。伯莎的"疯癫"及其纵火的行为,大多数评论者认为是遗传其母亲的缘故。此篇文章则认为这种"疯癫"是身份认同失败后身份迷失分裂的结果,伯莎分别在内部空间与外部空间中寻求认同却都以失败告终。其内部空间的认同在于与亲人的认同,外部空间的认同则为与黑人群体及白人群体的认同,内、外部空间身份认同的双重失败导致了伯莎偏激异常的心理及一系列行为,最终纵火而亡。     

中国职业教育立法的百年历程及反思

中国职业教育立法在百年历程中进行过数次的制度构建。清末实业教育立法为民国职业教育立法奠定基础,在效法他国模式、学习其先进经验的进程中进行本土化的实践与探索,逐渐形成了比较完备成熟的职业教育法律体系。新中国成立后,单纯照搬苏联模式,全盘否定旧中国的立法体系,加上受到政治运动的影响和干扰,职业教育的发展及其法制建设大起大落。直到改革开放后,中国职业教育立法才逐步走上正轨,并取得重大成就。中国职业教育立法的百年历程,每一个时期都有其自身鲜明特点,需要我们认真归纳、总结和反思其中成败得失,为推动中国职业教育法制建设进程尽绵薄之力。     

Deformation mechanism of high-stress and broken-expansion surrounding rock and supporting optimization based on the gray correlation theory

Aiming at the large deformation and support problems of high-stress and broken-expansion surrounding rock, and taking 1 000 m level roadway of Mine II in Jinchuan as the research object, an investigation on the deformation and damage of roadway surrounding rock and an analysis of its mechanism were carried out. The gray correlation theory was used in support scheme optimization design. First, causes and mechanism of deformation of the 1 000 m horizontal transport channel were analyzed through field investigation, laboratory test and data processing methods. We arguued that poor engineering geological conditions and deep pressure increases were the main factors, and the deformation mechanism was mainly the ground deformation pressure. Second, the gray correlation theory was used to construct supporting optimization decision method in the deep roadway. This method more comprehensively considers various factors, including construction, costs, and supporting material functions. The combined support with pre-stressed anchor cables, shotcrete layer, bolt and metal net was put forward according to the actual roadway engineering characteristics. Finally, 4 support schemes were put forward for new roadways. The gray relational theory was applied to optimizing the supporting method, undertaking technical and economic comparison to obtain the correlation degree, and accordingly the schemes were evaluated. It was concluded as follows： the best was the flexible retaining scheme using the steel strand anchor; the second best was the one using plate anchors on the top and rigid common screw steel bolt on the two sides; the ttiird was; the rigid common screw steel bolt in full section of roadway; and the worst is the planished steel rigid support. The optimized scheme was applied to the 1000 m level of new excavation roadway. The results show that the roadway surrounding rock can reach a stable state after 5 to 6 months monitoring, with a convergence rate less than 1 mm/d.     

我国甲A女排运动员竞技能力评价指标与模型构建

采用文献资料、问卷调查等研究方法,分析影响我国甲A女排运动员竞技能力各因素指标的相关性、各项指标与比赛成绩之间的关系及各项指标在各因素中所占的权重,建立我国甲A女排运动员竞技能力各因素的评价模型及竞技能力的综合评价模型,客观、量化地评价我国甲A女排运动员的竞技能力,为调控运动训练,提高训练的针对性、系统性提供参考依据。     

现代足球比赛中胜负关系和战术运用的辩证思考

对足球比赛中胜负关系的辩证分析，可以指导教练员及队员正确对待比赛的胜利与失败。对足球比赛中战术运用的辩证分析表明：在训练和比赛中正确把握进攻与防守、数量与质量、快与慢的关系，有利于全面提高足球的技战术水平。     

浅析培养学生健康心理素质的重要性

每年有大批学生高考失利的主要原因是由于心理素质欠佳所致。帮助青少年树立健康的心理素质可以从几方面加以解决:教师引导;心理咨询;自我调控。