Process capability analysis and estimation scheme for autocorrelated data

<正>Autocorrelation is prevalent in continuous production processes,such as the processes in the chemical and pharmaceutical industries.With the development of measurement technology and data acquisition technology,sampling frequency is getting higher and the existence of autocorrelation cannot be ignored.This paper analyzes five estimation schemes of process capability for autocorrelated data.Comparisons among these schemes are discussed for small sample and large sample.In conclusion,this paper gives a procedure of process capability analysis for autocorrelated data.     

一类非线性差分方程组的全局渐近稳定性

对一类非线性差分方程组的正解的收敛性进行了研究,当函数if和gi(i=1,2,4,5)满足一定的条件时,证明了该方程组有唯一的正平衡解且是全局渐近稳定的.     

A bioinformatic evaluation of potential allergenicity of 85 candidate genes in transgenic organisms

The potential of genetically modified organisms(GMOs) to increase allergenicity or predispositions to allergies has attracted much attention.An approach that will properly and holistically evaluate the allergenicity of GMOs is yet to be found.Here,85 transgenes that have been reported in both international and domestic studies during recent years are summarized case by case;49 of the transformed genes were from plant sources and 36 were from animal sources.EVALLERTM,a web server for the in silico assessment of potential protein allergenicity,was used to evaluate the potential of the transgenic proteins as allergens.The biomedical journals listed in Highwire(http://highwire.stanford.edu/) were searched and reviewed to decipher whether any of the transformed genes were linked to allergenicity or human health.The EVALLER analysis identified 5 allergenic genes,whilst our literature review found 11 genes that were either related to allergic cases or to clinical adverse events;all 16 of these genes have been used in GMOs.The analysis pathway that we have developed can help guide the selection of genes to be used in genetic modification.The pathway also provides a paradigm for allergenicity analysis of transgene candidates.     

α-环糊精与聚（乙二醇-L-乳酸）二嵌段共聚物的包结物的制备与表征

合成了聚（乙二醇-L-乳酸）二嵌段共聚物（PELA），并制备了其与α-环糊精（α-CD）的包结物（IC），通过红外光谱、差热扫描量热、广角X射线衍射和核磁共振氢谱对产物的结构和性能进行了表征。结果表明：PELA分子链被包结在α-CD分子形成的管道中，α-CD分子管道并排紧密排列，形成六方晶系的晶体。在IC中PELA链活动被限制，无结晶和熔融现象。IC中的α-CD与聚乙二醇嵌段结构单元的物质的量之比为1/4.7。     

对CALL环境下大学英语教学的思考

文章指出了CALL环境下的大学英语教学具有教学内容更丰富、学习渠道更多和师生联系更方便的优势,并指出了存在资源的浪费、教师技术和理论知识的缺乏、学生的电子阅读技能不足等问题。     

高职英语分层教学法效果的实证研究——以盐城纺织职业技术学院为例

高职学生入学时的英语水平差异较大,给英语教学带来了极大的影响,为此,盐城纺织职业技术学院进行了高职英语分层教学的实践探索,文章就英语分层教学法的效果展开研究,最后总结了几点教学心得。     

基于改进遗传算法的桁架结构优化

桁架是一种广泛应用于工程领域的结构形式,对其结构优化有重要的意义.文章提出了随种群的进化而动态变化的自适应交叉算子和变异算子,以提高算法的优化效率及增强收敛性;引入了精英保留策略,以克服各代种群最佳个体未能保护的缺点.建立以最小化结构总重量为目标函数的桁架优化数学模型,并应用改进的遗传算法对桁架结构进行优化求解.通过实例验证了所建模型以及对算法改进的有效性和实用性.     

Synthesis process of Ba-ferrites from α-FeOOH and γ-FeOOH and investigation of magnetic properties

The claviform BaFe₁₂O₁₉ crystals were synthesized by the precipitation-toptactic reaction method using α-FeOOH and γ-FeOOH as raw materials respectively. The synthesis processes of BaFe₁₂O₁₉, studied by XRD, SEM, EDS, FT-IR, and TG-DTA techniques, included preparations of precursor γ and precursor α, formations of α-Fe₂O₃ and BaFe₂O₄, and production of rod-like BaFe₁₂O₁₉ through dehydroxylation of pod-like FeOOH, followed by reactions of α-Fe₂O₃ with BaCO₃ and BaFe₂O₄. The crystallinity of α-Fe₂O₃ and BaCO₃ from precursor α was better than from precursor γ due to the direct dehydroxylation of α-FeOOH, resulting in a lower nucleation rate and better crystallinity of BaFe₂O₄. BaFe₁₂O₁₉ prepared from precursor α showed lower crystallinity and purity with a higher length-diameter ratio than from precursor γ. The VSM results proved that the appearance of final products had an important influence on magnetic properties.     

Range walk and array rotation in space-time adaptive processing: effects and compensations

This paper proposes a unified clutter model incorporating the effects of range walk and array rotation for space-time adaptive processing (STAP) in airborne multi-channel early-warning radar. Based on this clutter model, STAP performance is then analyzed from the perspective of covariance matrix tapering (CMT). For STAP performance degradation due to array rotation, a determinate compensation method is proposed based on the CMT method. Numerical examples are provided to verify the analysis and the proposed compensation method.     

滑坡变形阶段的划分及短期预报研究

滑坡是一种重要的地质灾害,一旦发生,就会带来严重的后果,本文研究了滑坡变形阶段的划分问题,并在此基础上提出了每个阶段应该进行的相应工作及目的。当滑坡进入加速变形阶段后期,出于防灾减灾的需要,此时准确预报滑坡发生时间显得尤为重要,结合实际工程本文研究了滑坡进入加速变形阶段的短期预报问题,并取得了较好的效果。