当代中学生的心理特点及教育对策

当代中学生的心理具有多面性,是复杂的一代,总体来说,他们具有以下特点:第一,他们处于信息技术高速发展的今天,见多识广,有着强烈的求知欲和上进心,喜欢独立思考,有主见.第二,绝大多数的学生是独生子女,喜欢表现自我,进而形成了固执,以自我为中心的思维方式和行为习惯.第三,在应试教育的驱使下,过多的心理压力又使他们形成了封闭心理、逆反心理.第四,由于当代的中学生从小受到过多照料和宠爱,在确立学习目标的时候志向高远,而在进行的过程中,却时时动摇.这些情况给我们德育工作提出了更加复杂和更加严峻的挑战,德育工作要想有实效性,教育对策必须实现"三个转变".     

80年人民军队后勤建设的基本经验

80年来,人民军队后勤工作在党的领导下,经过几代人的艰苦奋斗,从无到有,由弱到强,创造了后勤史上的无数奇迹,取得了举世瞩目的伟大成就,也积累了一系列极其宝贵的历史经验.这些经验,既有不同历史时期的经验,各级各类部队的经验,也有各种作战样式的保障经验,各个专业、各种事业的建设经验,以及各项后勤改革的经验等等,精彩纷呈,无比丰富,已经成为人民军队后勤的宝贵精神财富.     

“准排长”攻读“战士学位”

干当兵的活,想带兵的事,做懂兵的人。50天,他们记住了:煞费苦心叠好了"豆腐块",班长会告诉他们,叠的是被子,练的是作风;走着反反复复的"一二一",班长会告诉他们,走过的是路程,得到的是素质;喊着震耳欲聋的呼号声,班长会告诉他们,花费的是气力,收获的是气质。在这里,他们孜孜不倦地汲取着军营沃土的营养,在摸爬滚打中打磨掉了文弱的书生气。     

自觉维护军人的形象

人 民解放军官兵 ,在全国人民心目中的形象 ,是高大的 ,可谓光彩照人。这是一代又一代革命军人 ,以自己的行动 ,实践我军全心全意为人民服务宗旨的结果。现在 ,我军广大指战员 ,像革命前辈一样 ,以高度的政治责任感 ,维护军人的形象。如在社会生活中 ,遵纪守法 ,礼貌待人 ,助人为乐 ,见义勇为 ,行止端庄 ,着装整洁。这种自觉性是很可贵的。但是 ,随着市场经济的发展 ,社会生活更为复杂 ,军人如何维护自己的形象 ,出现了许多新问题。有些现象 ,看似光亮 ,实际上在一点一滴损害着军人的形象 ,一不小心 ,就会中人圈套。最近同一些干部战士交谈 …     

《新语集》荟萃

1.论思想:毋庸置疑,马克思主义这棵参天大树,会不断抽出些新枝来。2.论道德:天下最真的是婴儿,最善的是婴儿,最美的是婴儿,最执著的是婴儿,最快乐的是婴儿,最安全的是婴儿。修为修到婴儿境界,便成了圣人。3.论人生:少年,缺少的是一根火柴;青年,缺少的是一把雕刀;中年,缺少的是     

谈中学数学的概念教学

数学概念是“双基”(即基础知识和基本技能),教学的核心内容是基础知识的起点,是逻辑推理的依据,是正确合理、迅速运算的基本保证,而中学数学概念众多纷繁,有的简单,有的复杂,有些直观易懂,有的难以接受,有些容易混淆,有些不同的概念却存在一定的相关性,如何采用适当的方法讲授这些概念,使学生正确理解,牢固掌握,我在教学实践中通常采用以下方法:一、复杂的概念,突出关键词数学概念是借助语言文学或符号来表达的,表达复杂概念的语句中必有关键词,讲解中突出这一与理解。例如:奇函数的概念,如果对于函数f(x)的定义域里的任一x都有f(-x)=-f(x)…     

碗

我家的瓷碗,已经很久没有换过了。白色的底,淡蓝色的碎花,不甚惊艳,但看起来却很有家的味道。沾过胖乎乎的饭粘子,盛过滋味百转千回的海鲜汤,装过令人垂涎欲滴的黄焖鸡,挨过竹筷子的碰,受过铁调羹的敲,淋过柠檬味道的洗洁精,日复一日,年复一年,我家的碗敛藏了所有生活的味道。衣服越穿越旧,车子越开问题越     

军事经济学院标兵先进事迹介绍

近年来,学院广大教职员工坚持以邓小平理论和“三个代表”重要思想为指导,与时俱进,开拓创新,立足本职,无私奉献,涌现出一大批先进典型。经自下而上推荐,学院党委酝酿筛选,李民生等8名同志被评为“奉献在岗位,建功在基层”标兵。这些同志是先进典型的优秀代表,他们的先进事迹,集中反映了广大教职员工坚定的政治立场、崇高的理想信念、高尚的道德情操和良好的精神风貌,充分体现了学习实践“三个代表”重要思想的丰硕成果,具有鲜明的时代特征。全院广大教职员工要学习他们信念坚定、党性为先的思想境界;学习他们潜心教学与科研,淡泊名利,甘当人梯的高尚品德;学习他们热爱基层,建功立业的敬业精神;学习他们敢于创新,勇攀高峰的进取意识。同心同德,团结奋进,为实现学院跨越式发展而努力奋斗!     

卧底,在最危险的地方

正这是一场战争,没有硝烟弥漫、子弹横飞,却险相环生、生死争锋。这里是战场,金三角近在咫尺,毒品渗入内地的"黄金通道"。他们,是一群特殊的军人和警察,在各个角落里出没,直面阴暗和危险,目标只有一个:肃清毒品。他们,有的卧底在最危险的缉毒前沿,有的身着橄榄绿,与毒贩周旋。在这里,没有人可以置身事外,在这里,每一刻都在战斗,战斗,一直并依然在继续——他们在家里,是温和的长者,隔壁家三岁的小儿子都可以"欺负"他,揪着他的头发骑大马。走出家门,他就是一匹狼,在面对每一个"猎物"时,冷静、沉着、果敢、迅捷,一击必中。     

梅红

皑皑雪原中,一片梅林迎风傲雪,青色的梅枝上梅花绽放,吐红喷翠,清新雅致。每每想到梅花怒放的景象,我总会想起一个人来,她的名字叫梅红。十年前,我曾对梅红进行了一次采访。这么多年过去了,发生在她身上的事,一点也没有在我脑海里淡化,反而异常清晰。在我眼中,她就是一朵梅花,迎着风雪,开得灿烂。初次见到梅红时,她正把一碗热气腾腾的米饭,递向瘫痪在床的丈夫。那时,她的头发已落上了"雪霜",蓬松杂乱。脸上堆满了岁月流淌的痕迹,似核桃壳上的纹路。那年,她刚满50岁,但岁月已使她变成了一个老人。忆想当年,梅红可是一个鲜鲜亮亮的俏姑娘。16岁,梅红     

纯方位系统定位与跟踪的本载体最优轨线方程及其最优轨线

给出了纯方位系统在目标任意变速变向运动或不动情况下,目标定位与跟踪中的本载体确定性控制最优和次优轨线方程以及其最优轨线。这一结果是完全用解析方法得到的。     

一种基于组合降维的图像识别方法

为克服图像识别中传统方法需要进行高维矩阵奇异值分解的困难,提出了先局部降维再总体降维的组合变换方法.ORL人脸图像数据库的实验表明,这一方法不仅减少了运算量,而且能较好地解决人脸这样一类复杂的图像识别问题;总体来说优于传统的基于KL变换的识别方法.     

Analysis and optimal design of discrete order picking technologies along a line

Order picking accounts for most of the operating expense of a typical distribution center, and thus is often considered the most critical function of a supply chain. In discrete order picking a single worker walks to pick all the items necessary to fulfill a single customer order. Discrete order picking is common not only because of its simplicity and reliability, but also because of its ability to pick orders quickly upon receipt, and thus is commonly used by e‐commerce operations. There are two primary ways to reduce the cost (walking distance required) of the order picking system. First is through the use of technology—conveyor systems and/or the ability to transmit order information to pickers via mobile units. Second is through the design—where best to locate depots (where workers receive pick lists and deposit completed orders) and how best to lay out the product. We build a stochastic model to compare three configurations of different technology requirements: single‐depot, dual‐depot, and no‐depot. For each configuration we explore the optimal design. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008     

一类折扣型投资模型的最优停止

本文对一类折扣型投资模型进行研究，给出了一个明确的停止规则。     

A nonlinear continuous time optimal control model of dynamic pricing and inventory control with no backorders

In this paper, we present a continuous time optimal control model for studying a dynamic pricing and inventory control problem for a make‐to‐stock manufacturing system. We consider a multiproduct capacitated, dynamic setting. We introduce a demand‐based model where the demand is a linear function of the price, the inventory cost is linear, the production cost is an increasing strictly convex function of the production rate, and all coefficients are time‐dependent. A key part of the model is that no backorders are allowed. We introduce and study an algorithm that computes the optimal production and pricing policy as a function of the time on a finite time horizon, and discuss some insights. Our results illustrate the role of capacity and the effects of the dynamic nature of demand in the model. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

新疆高等教育资源配置的现状及问题研究

高等教育资源的合理配置是提高高校办学质量和效益的前提和关键。本文通过梳理新疆高等教育资源配置现状及存在的具体问题,进一步提出优化高等教育资源配置的对策建议,以期充分发挥高等教育在新疆社会发展中的巨大作用。     

基于最大故障特征信息熵的测试点优化设计

为解决故障诊断和可测试性设计中普遍存在的测试点优化问题,以相关性矩阵模型为基础,建立了最大故障特征信息熵的优化准则,给出了相应的测试点优化设计方法。应用实例表明：该方法是可行的、正确的,能为武器装备的故障诊断和可测试性设计提供有力的支持。     

Concavity and monotonicity properties in a groundwater management model

We consider a discrete‐time groundwater model in which the cost of pumping takes a slightly different form to that which has been traditional in the research literature to date. This enables us to prove that (a) the optimal pumping quantity is nondecreasing in the ground water stock, (b) the stock level remaining after each period's pumping is also nondecreasing in the groundwater stock, (c) the optimal decision is determined by maximizing a concave function, and finally (d) the optimal pumping quantity is nonincreasing in the number of periods to go. We show that (a)–(c), while intuitive, do not hold under traditional modeling assumptions. We also explain the connections between our results and similar ones for some classic problems of operations research. © 2011 Wiley Periodicals, Inc. Naval Research Logistics 00: 000–000, 2011     

有源干扰条件下基于NSGA-Ⅱ的雷达网优化部署方法

在有源干扰条件下,雷达网部署直接影响着防区内指挥信息系统的预警监测能力。由于防区内由分散于不同位置,且重要度不同的责任区组成的,那么实现全方位全纵深的预警能力,将是雷达网部署的重要方面。根据覆盖系数和重叠系数为主要优化目标,基于NSGA-Ⅱ算法进行多目标优化。首先定义了覆盖系数和全局重叠系数两个指标,尤其是全局重叠系数打破了以往重叠系数的概念,从全局出发引导雷达网优化部署;同时,提出基于NSGA-Ⅱ的多目标优化部署算法,采用诱导跳跃、基因到位、诱导交叉等候选解生成方式,保持种群多样性,提高算法收敛性。实验表明,部署优化算法耗时较低,不同干扰源部署态势使网络节点部署产生较大差异,多样的候选解生成方法明显提高了算法的收敛速度。     

Optimal staffing in nonstationary service centers with constraints

This paper considers optimal staffing in service centers. We construct models for profit and cost centers using dynamic rate queues. To allow for practical optimal controls, we approximate the queueing process using a Gaussian random variable with equal mean and variance. We then appeal to the Pontryagin's maximum principle to derive a closed form square root staffing (SRS) rule for optimal staffing. Unlike most traditional SRS formulas, the main parameter in our formula is not the probability of delay but rather a cost‐to‐benefit ratio that depends on the shadow price. We show that the delay experienced by customers can be interpreted in terms of this ratio. Throughout the article, we provide theoretical support of our analysis and conduct extensive numerical experiments to reinforce our findings. To this end, various scenarios are considered to evaluate the change in the staffing levels as the cost‐to‐benefit ratio changes. We also assess the change in the service grade and the effects of a service‐level agreement constraint. Our analysis indicates that the variation in the ratio of customer abandonment over service rate particularly influences staffing levels and can lead to drastically different policies between profit and cost service centers. Our main contribution is the introduction of new analysis and managerial insights into the nonstationary optimal staffing of service centers, especially when the objective is to maximize profitability. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 615–630, 2017