A planar single facility location and border crossing problem

In this study, we tackle the problem of locating a facility in a region where a fixed line barrier divides the region into two. The resulting subregions communicate with each other through a number of passage points located on the line barrier. Our contribution is threefold. First, we formulate the problem as a Mixed Integer Nonlinear Programming (MINLP) model and provide an optimal solution methodology based on an Outer Approximation (OA) algorithm. Second, we discuss the minimax version of this problem for locating an emergency facility and use the OA algorithm to solve the problem. We then provide simple example problems and extensive computational results for both problems. Finally, we propose a one-infinity approximation approach for the latter problem which yields a linear model. Practical uses of the models have been discussed in the border crossing context.     

缅甸某区块始新统沉积相对储层的控制作用分析

研究区位于缅甸伊洛瓦底盆地中部,是油气勘探的有利地区。通过对研究区始新统不同沉积相带储层特征研究,认为水下分流河道为最有利的储层发育微相;分流河道、辫状河道、河口坝次之;天然堤、决口扇砂体的储层性质相对较差,反映了沉积相对储层的发育特征有一定的控制作用。     

陕甘宁边区军事建设中的文化学习运动简

抗战时期,陕甘宁边区军事建设中开展的文化学习运动,是以扫除文盲,提高边区驻守部队广大指战员的文化知识和政治理论水平,提高部队文化素质为主要目标的文化教育运动。论述了边区军事建设中的文化学习运动取得了显著的成效,普遍提高了部队广大指战员的文化水平,促进了部队的军事建设及其对敌斗争,胜利完成了保卫和巩固边区的神圣任务。     

抗战时期陕甘宁边区的剿匪斗争

抗战时期陕甘边区政府为维护边区社会秩序,巩固抗战后方,展开了清剿国民党顽固派庇护的政治股匪和危害人民群众土匪的斗争,并通过军事打击和政治上的争取和瓦解,取得了剿匪斗争的彻底胜利。这不仅积累了丰富的对敌斗争经验,而且成为边区军事斗争的重要组成部分。     

缅甸矿产资源及其投资政策

简要介绍缅甸地质背景和地质资源的基本状况,缅甸国家鼓励外商投资优惠政策,以及缅甸的矿业法的基本条款。     

中共抗战教育思想与陕甘宁边区的教育事业

抗战时期中国共产党提出了一整套抗战教育思想理论和方针政策,其核心就是要使教育为抗战服务,不仅积极呼吁国民政府改革旧的教育制度,而且在陕甘宁边区等抗日根据地全面改革旧的教育体制,推行"干部教育重于社会教育,社会教育重于儿童教育"的适应抗战需要的独特教育体制,谱写了我国教育史上的特殊篇章.     

浅析6 to 4机制

6to4机制是为了顺利完成从IPv4到IPv6的过渡而提出的一种策略。其优点在于任何一个IPv6域，只要可以与IPv4网络相连就能将标准的IPv6数据包经过特殊封装后由IPv4网络发送，并且不需要对现有的IPv4网络做很多的改动。     

基于安全配置准则的路由策略冲突级别的确定

提出了一种基于路由策略安全配置准则的路由策略冲突级别确定方法。路由振荡时,先由路由冲突检测方法动态检测导致路由振荡的路由策略冲突集合,再以安全配置准则作为评判路由策略冲突级别的依据,为冲突集合中的路由策略确定其冲突级别。最后,给出了一个仿真实例来说明其执行结果。     

近红外光谱协同BP神经网络的泰国茉莉香米掺伪含量快速鉴定

利用近红外光谱协同BP神经网络算法,对泰国茉莉香米及其掺伪样品的近红外光谱进行多元散射校正预处理,挑选出48个特征波长;以特征波长的吸光度为BP神经网络输入层神经元,以样品中泰国茉莉香米的含量为输出层神经元,获得BP神经网络算法的最优结构模型,即为单层隐含层、隐含层神经元数7、隐含层传递函数logsig、输出层传递函数...     

Calcium Absorption from Commonly Consumed Vegetables in Healthy Thai Women

ABSTRACT: The absorbability of calcium from ivy gourd, a green leafy vegetable (Coccinia grandix Voigt.) and winged bean young pods (Psophocarpus tetragonolobus [L] DC) were measured in 19 healthy adult women aged 20 to 45 y, in a 3‐way, randomized‐order, crossover design with an average calcium load of 100 mg and milk as the referent. The test meals were extrinsically labeled with 44Ca and given with rice as breakfast after an overnight fast. Absorption of calcium was determined on a blood sample drawn 5 h after ingestion of the test meal. Fractional calcium absorption (X± SD) was 0.391 ± 0.128 from winged beans, 0.476 ± 0.109 from ivy gourd, and 0.552 ± 0.119 from milk. The difference in fractional calcium absorption for these 2 vegetables was significant (P < 0.05) and the fractional calcium absorption from these 2 vegetables were both significantly lower than from milk. The difference was partly accounted for by the phytate, oxalate, and dietary fiber content of the vegetables. However, calcium bioavailability of these 2 vegetables, commonly consumed among Thais, was relatively good compared to milk (71% to 86% of milk) and could be generally recommended to the public as calcium sources other than milk and Brassica vegetables.