查询词典 stepwise

First we use stepwise regression and stepwise autoregression to establish polynomial trend-autoregression error model.

首先通过逐步回归与逐步自回归，建立太阳黑子数的多项式趋势-自回归校正模型。

Methods We used correlation analysis to precondition the data to reject indexes, and used stepwise discriminatory analysis to choose indexes and made the diagnosis by multiple linear discrimination analysis.

方法用相关分析做数据预处理剔除指标，再用逐步判别分析(stepwise discriminant analysis，SDA)选入指标，并用多元线性判别分析诊断，最后随机抽样比较剔除指标前后的诊断效果。

The iris radius of 60 (93 eye) patients with early pupillary block primary angle closure glaucoma was measured with this method, it showed:(1) there was a statistically significant difference in iris radius between the patients with early stage primary pupillary block angle closure glaucoma and the normal subjucts (53 cases 106 eye) with the age matched group (P.01),(2) it is proved with the stepwise discriminatory analysis that the iris radius-the most significant bio-anatomic parameter of the anterior segment is usefull to diagnose early primary pupillary block angle closure glaucoma by stepwise discriminatory analysis.

本研究用此测量法测量了60例93只眼早期原发性瞳孔阻滞性闭角型青光眼的虹膜曲率半径，发现：（1）早期原发性瞳孔阻滞性闭角型青光眼患者的虹膜曲率半径小于同年龄正常人（53例106眼）的虹膜曲率半径，其差异具有显著性统计学意义（P.01）；（2）经多因素逐步判别分析证明本研究所提出的活体眼前节解剖学测量参数——虹膜曲率半径有助于原发性瞳孔阻滞性闭角型青光眼早期诊断。

Introduced stepwise regression method, and how to use stepwise regression to establish the best linear regression equation.

详细说明：主要介绍逐步回归的方法，并介绍如何利用逐步回归建立最佳线性回归方程。

In order to study the factors related to Enterobius infection among per-schoolchildren, a structural questionnaire with multi-stages and a random sampling was designed to interview parents of 702 pre-schoolchildren. The questionnaire included personal information of the children: their educational background and parents' occupation; the status of their housing; their handwashing habits, and their frequency and habits of bathing, etc. In addition, the children's pinworm infections were examined using two-consecutive-day adhesive cellophance paper perianal swabs. Variables causing the pinworm infection among infected and noninfected children were analyzed by x2-test and multi-variable tests including discriminant analysis and stepwise multiple regression.

为了解学龄前儿童蛲虫感染之因素，以结构型问卷多步骤随机抽样访视702名学龄前儿童的家长，问卷的内容包括：儿童个人资料、儿童父母亲教育程度、职业、住屋情形、卧室分配情形、手部卫生习惯、洗澡习惯等，并以连续两天玻璃胶纸肛围擦拭法〈two-consecutive-day adhesive cellophane paper perianal swabs〉检查儿童的蛲虫感染情形，儿童蛲虫感染与各单变项的相关，以卡方检定〈x2-test〉分析，而多变项的分析则以判定分析〈discriminant analysis〉及逐步复回归〈stepwise multiple regression〉进行分析。

The influence factors selected by stepwise regression analysis were independent eating, timing eating, eating in fixed position and feeding complementary foods by nursing bottle.

以stepwise逐步回归法进行营养相关因素多重回归分析，最后进入方程变量为独立进食、定时进餐、固定位置进餐，奶瓶喂辅食频率。

objective to study the correlation among psychosomatic health factors,depression,anxiety and sleep status in college students,to analyze influence factors in sleep status.methods with questionnaire opened in-vestigation,200college students were evaluated using cornell medical index,self-rating depression,self-rating anxiety scaleand pittsburgh sleep quality index.stepwise regression analysis was used.re-sults total score of sds was35.55±7.8,and sas was0.48±0.9.each score of cmi was higher than normal range,the highest was digestion system,next was respiration system,then,fatigue,eyes and ears,anxiety,sensitivity,tension,maladjustment in turn.total average score of psqi was6.32±3.6,ordinary sleep were115cases（57.5%）,good and bad sleep were42（21%）and43（21.5%）cases respectively.influence factors in total score of psqi were sas,cmi,respiration system,anxiety,past healthy,digestion system,fatigue,sensitivity,sds and malad-justment in turn,using stepwise regression analysis,total score of psqi as dependent variable,each factor score of cmi,total score of sds and sas as independent variables.conclusion problems of psychosomatic health,anxiety and depression could both lead to sleep disorder.

目的 研究在校大学生心身健康因素及抑郁焦虑等与睡眠状况的相关性，并对影响睡眠状况的有关因素进行分析。方法采用问卷式的开放性研究，对在校的200名大学生进行康奈尔心身健康问卷、自评抑郁量表、焦虑自评量表和匹兹堡睡眠质量量表的测定，采用逐步回归分析方法。结果 sds总分为35.55±7.8、sas总分为0.48±0.9，cmi评分：消化系统最为严重评分为2.52，其次为呼吸系统、疲劳感、眼和耳、焦虑、敏感、紧张、不适应等，评分均高于正常常模。psqi总均分为6.32±3.6，一般睡眠有115例占57.5%，睡眠质量较好42例占21.0%，睡眠质量较差43例占21.5%。评估对睡眠状况的影响程度，以psqi总分为因变量，选择cmi各因子分和sds、sas总分作为自变量，进行多因素逐步回归分析，进入方程的因素依据标准化偏回归系数，影响psqi总分的因素依次为sas总分、cmi总分、呼吸系统、焦虑、既往健康、消化系统、疲劳感、敏感、sds总分、不适应（f=226.8；p.01；r=0.73）。结论心身健康问题和焦虑抑郁可导致睡眠障碍。

In gas phase, there are two reaction paths, the concerted and stepwise mechanisms, both of which produce the experimental product, hydroxamic acid; the stepwise mechanism is predominant.

在气相中均找到两条反应通道，即协同机理和分步机理，均生成实验产物氧肟酸，而且分步机理均为优势通道；除2-甲基-2-亚硝基丙烷的反应没有协同途径外，在溶剂中反应机理与气相中的类似。

Comparing with the result of methyl iodide in intense laser field, some differences are observed:(1) at the same laser field intensity, the highest charged fragment ion of methyl bromide was Br(superscript 3+), lower than I(superscript 6+) of methyl iodide;(2) the dehydrogenation channel was observed in the multiphoton dissociation or Coulomb explosion of methyl bromide, but was not observed in the case of methyl iodide;(3) HBr(superscript +) was observed, but there was no similar channel in the case of methyl iodide;(4) for methyl bromide, the valid charge distance of Coulomb explosion increases with the product of p and q; while in the case of methyl iodide, the distance remained almost the same;(5) the producing channel of CH(superscript + subscript m)(m=0, 1, 2) is different from the ionization-dissociation of methyl iodide in which the stepwise dissociation of CH3(superscript +) was thought to be the main channel, CH(superscript + subscript m)(m=0, 1, 2) of methyl bromide are mainly from the products of the direct dissociation of the dehydrogenated parent ions instead of the stepwise dissociation of CH3(superscript +).

与碘甲烷在强场中的实验结果对比发现：(1)在相同的激光场强下，碘甲烷电离解离的最高价碎片离子为I(上标 6+)而溴甲烷为Br(上标 3+)；(2)溴甲烷质谱中存在母体离子的脱氢产物CHBr和CHBr(上标 2+)，而对于碘甲烷，没有检测到这些通道，C-I键首先断开；(3)质谱中存在H^79Br和H^81Br，而碘甲烷的电离解离中不存在HI产物；(4)溴甲烷库仑两体爆炸的有效电荷间距随着两碎片电荷乘积的增大而增大，而对于碘甲烷此间距几乎不随电荷乘积变化；(5)CH(m=0， 1， 2)的主要生成通道可能与碘甲烷不同，不是来自CH3的顺序脱氢，而是来自脱氢母体离子的直接解离。

The traverse grinding can be assumed as the sum of several stepwise plunging grindings with respect to the grindings contact area. The dynamic model of workpiece and grinding wheel stepwise plunging grinding was set up in the form of closed loops.

基于再生颤振机理，以切入磨再生颤振建模为基础，将外圆纵磨过程简化为多步以磨削接触区为磨削宽度的小切入磨的叠加，建立了工件、砂轮小宽度切入磨动力学模型并对其稳定性进行了研究。

Means the parent directory, so this command means to execute "toolchain.sh," which is in the current directory.

代表父目录，所以这个命令就是执行当前目录下的"toolchain.sh"。

Yes,In fact,I'm on our city ream.

是的。事实上我是我们市队的。