Methods The AC/ A ratio was measured in 142 cases of children with intermittent exotropia using a type 2001 synoptophore manufactured by the British CCAS company. The children were then divided into groups based on the type of refractive error and whether or not spectacles were worn. 方法用英国CCAS公司生产的2001型同视机测量142例间歇性外斜视儿童AC/A比率,根据屈光性质和平时有无戴镜分组。
It analyses the factors that effect the location of work pieces and accurate intermittent time of geared ratchet intermittent mechanism so that formula is derived for calculating the error for the movement of the geared ratchet mechanism. 分析了齿式棘轮间歇机构影响工件准确到位,间歇时间准确的因素,从而推导出齿式棘轮机构运动误差的计算式。
The results show that the characteristics of intermittent air conditioning are quite different from those of continuous air conditioning, and the present design calculation method of hourly cooling load has a notable error in the calculation of air conditioning cooling load in residential buildings; 结果表明,住宅间歇空调的冷负荷和能耗特性与连续空调大不相同,现有的逐时空调冷负荷设计算法的误差较大;
Two ways to provide the intermittent information are put forward, and the information volume, the transmission rate and the error-control schemes are analysed. 提出了两种点式信息产生的方案,分析了信息容量、信息发送速率和差错控制方案。
The results show that the frosting has a strong relationship with the running ratio under the intermittent running conditions, and the conjunction equation which has a minor error compared the experimental results responses the relationship. 结果表明,在非连续工况中,结霜量是一个与运行比有极大关系的值,而拟合的关联式则体现了这种关系,并与实验结果有较小的误差。
The author provided the necessary basis for the design and manufacture of intermittent rotary sheet transfer mechanism by analyzing the influence of component error and clearance to the kinetic properties of sheet transfer mechanism, and the main factors which influence the precision of the sheet transfer mechanism. 分析了构件误差和间隙对该递纸机构运动特性的影响,分析了影响该递纸机构精度的主要因素,为设计制造间歇旋转式递纸机构提供了必要的依据。
This method fully considering the feature of each disturbance, enhance the accuracy and effectiveness of the evaluation results, avoid the intermittent switching and larger transient error caused by the multi-model switching method. 该方法充分考虑到每个扰动的特性,可以更加准确的评估时变扰动控制系统的性能,避免多模型切换方法可能导致的间歇切换以及较大的暂态误差对评估结果准确性的影响。