经济批量排产问题的一种排产方法

针对经济批量排产问题假定生产可以在库存降为0之前开始,并且提出新的算法求产品的生产顺序。结果表明,该排产方法成本要低于其他2种常用的经济批量排产问题的方法,并且给出了算法的时间复杂性。     

宋明理学与画学

本文运用了跨学科的比较方法,梳理了宋明理学与绘画美学的发展关系。认为道学与心学的融合对立表现在绘画美学中,是山水画从有我之境到无我之境的转变和对继承与创新的讨论。这种思想变化在明末清初的画家石涛身上表现得尤为突出,他显示出文人画家在遭遇突变后的复杂心态。而《苦瓜和尚画语录》的撰写,代表了哲学与美学结合的智慧结晶,体现了明清画论的最高水平。     

一种基于汉字笔画的验证码生成技术

文章提出一种基于汉字笔画的验证码生成技术.该验证码生成技术利用GIF动态验证码的优点，采用笔画、汉字以及GIF动画提示，要求验证者在给出笔画中按顺序选出汉字的正确笔画，并从给出的汉字中选中正确的汉字,利用DES加密算法实现B/S通信的传输安全,有效防止OCR识别技术，提高验证码安全性，增强了用户的体验感.     

塔河油田 XX 井区白垩系层序—古地理特征

摘要：在分析钻井、测井资料的基础上，采用井—震结合的方法对塔河油田西北部白垩系高分辨率层序地层和古地理进行了研究，将白垩系划分为 1 个巨旋回、3 个超长期旋回、6 个长期旋回、16 个中期旋回层序。总体上显示为水进到水退的沉积旋回，可识别出辫状河三角洲、曲流河三角洲和湖泊 3 种沉积沉积体系，代表了湖盆演化所形成的 3 个阶段。综合地震属性分析，探讨了各长期旋回层序古地理特征，本区白垩系物源主要由古天山提供，沉积相带主要呈南北向展布，各类砂体向南部逐渐尖灭，受现今南高北低的构造格局控制，易形成构造—岩性复合圈闭。     

关于非线性算子不动点收敛定理等价性的探讨

在适当放宽不动点定理的条件下，分别证明了Picard迭代序列与Mann迭代序列收敛定理的等价性以及Mann迭代序列与Ishikawa迭代序列收敛定理的等价性。     

关于Banach空间中Schauder分解序列的特征指标Υ_G(Ⅴ)——(Ⅱ)

讨论了作者得到的关于特征指标r_G(V)与空间分解定理的若干条件及相关性质,给出了Schauder分解序列相应的坐标射影算子可扩充到全空间的充要条件。     

一种利用PN序列的OFDM频率同步

提出了一种利用PN序列进行OFDM频率估计的新方法。在多径信道中,该方法由于利用了多径信号,提高了频率估计精度。仿真结果显示,其频率估计精度能满足Rayleigh信道下中低速运动时OFDM系统的要求。优点是,当合适选择参数,频率估计范围可达十几个子载波间隔,并且频率同步估计范围和精度可以调节。     

Managing coopetition in diversified firms: Insights from a qualitative case study

Cooperation among divisions is usually thought to explain the performance of diversification strategies. However, such divisions are also in competition. Through the in-depth analysis of an intraindustry diversified firm operating in the global semiconductor industry, this paper identifies the sources of coopetition and the treatment of coopetitive tensions among divisions in the production allocation process. We find a multipoint origin of cooperation within a competitive setting. Then, we extend a previous study that considers uniquely two substitute views: (a) corporate-centric; and (b) division-centric. Additionally, by employing formal organizational mechanisms, we show that corporate headquarters guides divisional interaction to form a circular coopetition process. Thus, it is feasible to consider that intrafirm competition and cooperation phases form in a dynamic loop.     

Reducing Periodicity of Fuzzy Markov Chains Based on Simulation Using Halton Sequence

We first introduce fuzzy finite Markov chains and present some of their fundamental properties based on possibility theory. We also bring in a way to convert fuzzy Markov chains to classic Markov chains. In addition, we simulate fuzzy Markov chain using different sizes. It is observed that the most of fuzzy Markov chains not only do have an ergodic behavior, but also they are periodic. Finally, using Halton quasi-random sequence we generate some fuzzy Markov chains, which are compared with the ones generated by the RAND function of MATLAB. Therefore, we improve the periodicity behavior of fuzzy Markov chains.