摘要：Clear effects criterion is one of the important rules for selecting optimal fractional factorial designs,and it has become an active research issue in recent *** et *** upper and lower bounds on the maximum number of clear two-factor interactions(2fi's) in 2n-(n-k) fractional factorial designs of resolutions III and IV by constructing a 2n-(n-k) design for given k,which are only restricted for the symmetrical *** paper proposes and studies the clear effects problem for the asymmetrical *** improves the construction method of Tang et *** 2n-(n-k) designs with resolution III and derives the upper and lower bounds on the maximum number of clear two-factor interaction components(2fic's) in 4m2n designs with resolutions III and *** lower bounds are achieved by constructing specific *** show that the number of clear 2fic's in the resulting design attains its maximum number in many cases,which reveals that the construction methods are satisfactory when they are used to construct 4m2n designs under the clear effects criterion.

摘要：本文给出了利用均匀设计和正交表构造低偏差 ＯＡＬＨ设计的方法，该方法构造的设计既有优良的均匀性又具有正交设计的均衡性，一个更重要的优点是可以构造较大样本容量的设计点集。本文同时给出了某些参数的均匀设计表，这些设计优于现有的均匀设计，具有实用价值．

摘要：本文中我们基于E(s2)最优超饱和设计和区组设计之间存在的对等关系，利用构造区组设计的方法之一－循环设计法，通过最小化ｆｒｍａｘ的进一步区分，对试验次数２４的情形，构造了相应的一系列超饱和设计．同时与现有的一些结果作了比较，验证了我们构造的设计的优良性。

摘要：在工业统计试验和其他科学试验中，常遇到因子个数多而所允许的试验次数少的情况，这时要用到超饱和设计．以前的文章仅研究了二水平因子的超饱和设计，本文对于三水平因子的超饱和设计提出了一种基于典则相关意义下的优良性准则和构造算法，并给出了试验次数为９和１８可分别安排到２６和３０个因子的三水平超饱和设计表．

摘要：超饱和设计被广泛应用于工业统计试验和其它科学试验的初期阶段 .本文采用逐步回归分析法对文献 [1 1 ,1 2 ]的超饱和设计进行了统计模拟 ,验证了该设计在变量选择上的有效性 ,也显示了逐步回归分析法是一种很好的应用于超饱和设计的数据分析方法 .

摘要：It is very powerful for constructing nearly saturated factorial designs to characterize fractional factorial (FF) designs through their consulting designs when the consulting designs are small. Mukerjee and Fang employed the projective geometry theory to find the secondary wordlength pattern of a regular symmetrical fractional factorial split-plot (FFSP) design in terms of its complementary subset, but not in a unified form. In this paper, based on the connection between factorial design theory and coding theory, we obtain some general and unified combinatorial identities that relate the secondary wordlength pattern of a regular symmetrical or mixed-level FFSP design to that of its consulting design. According to these identities, we further establish some general and unified rules for identifying minimum secondary aberration, symmetrical or mixed-level, FFSP designs through their consulting designs.

摘要：针对能够通过人眼球运动控制其运动的眼控机械臂,提出了一种基于图像梯度的眼动追踪算法。首先通过60 Hz摄像头捕捉连续帧图像并采用n帧一次比较的方式代替逐帧比较方式。然后对捕捉到的图像进行灰度化处理以消除噪声点。接着利用Haar特征和Adaboost分类器将人脸区域提取出来。再根据三庭五眼的原则进行眼球区域粗略萃取,并进行部分区域单独放大灰度化处理。最后利用图像梯度,对目标函数设定阈值进行二值化,完成精确的眼球中心定位。实验表明,该方法的准确度和定位速度完全适用于眼控机械臂。

摘要：许多因析试验中,试验者只关心指定的一部分因子效应的估计效果.针对此类问题,Addelman(1962)首次提出了折中设计的方法,并定义纯净折中设计以保证指定的因子效应被有效地估计出来,但此类纯净折中设计的分辨度限定Ⅲ为Ⅳ.本文研究了四类全新的折中设计,指定因子效应的集合分别记为{G_(1);G_(1)×G_(1)}、{G_(1);G_(1)×G_(1);G_(2)×G_(2)}、{G_(1);G_(1)×G_(1);G_(1)×G_(2)}和{G_(1);G_(1)×G_(2)}.相应地,可以定义四种类型的纯净折中设计,即指定因子效应全部纯净的设计.本文研究四类纯净折中设计的存在性和结构特性,给出一些理论结果和具体的构造方法.构造结果表明新型的纯净折中设计的分辨度为Ⅲ或Ⅳ,并且与Addelman(1962)提出的纯净折中设计相比具有更多的纯净两阶交互效应.

摘要：Split-plot designs have been widely used in industrial *** to now,most methods for choosing this kind of designs are based on the minimum aberration (MA) ***,by introducing a new pattern,called aliased effect-number pattern (AENP),zhang et *** a general minimum lowerorder confounding (denoted by GMC for short) criterion and established a general minimum confounding (also denoted by GMC for saving notations) *** is proved that,the GMC criterion selects optimal designs in a more elaborate manner than the existing ones,and when an experimenter has a prior about the importance ordering of factors in experiments the GMC designs are better than other optimal *** this paper we extend the GMC criterion to the split-plot design case and give a GMC-FFSP criterion for ranking split-plot *** comparisons of the new criterion with the MA-MSA-FFSP criterion are given,and the optimal 32-run split-plot designs up to 14 factors under the two criteria are tabulated for comparison and application.

摘要：再生水和微咸水等用于农田灌溉对缓解农业用水紧缺、保证粮食稳产高产方面作用显著。但这些非常规灌溉水中的盐分进入受灌农田土壤会引起土壤结构性质的改变,进而引起入渗水流运动特征的变化,增大了农业灌水和施肥的管理难度及地下水受污染的风险。本文通过室内灌水入渗试验,研究了灌溉水盐分浓度(0、1.0、3.0和5.0 g/L)、灌水频率(1天1次、2天1次、4天1次)、含盐灌溉水-清水交替灌溉模式(纯清水灌溉、纯含盐灌溉水灌溉、含盐灌溉水-清水交替灌溉)对受灌土壤容重、团聚体结构稳定性、孔隙结构特征、地表入渗性能以及入渗水流运动非均匀特征的影响。结果表明,适度的盐分浓度、较低的灌水频率但较大的灌水定额、含盐灌溉水-清水交替灌溉均有利于提升土壤团聚体的稳定性、抑制土壤板结、改善受灌土壤的地表入渗性能、降低入渗水流运动的非均匀性。研究成果对再生水和微咸水农田灌溉制度设计具有参考价值。