针对汽车纵向速度的实时计算问题,在分析汽车纵向运动学及动力学特性的基础上,提出了一种基于混合法和互补滤波器的车速实时计算方法.为了进一步提高车速计算系统在防抱死制动系统(ABS)干扰下的性能,根据互补滤波原理设计了一种扩展计算系统.为验证算法的有效性,搭建仿真平台,进行了相关的仿真实验.仿真结果表明,所提出的算法能够实现对汽车速度的实时计算,且具有较好的抗干扰性.

为小型养殖户生产颗粒鱼饲料,设计并制造了平模制粒机,其部件根据强度和刚度设计.文章介绍其主要组成及工作原理,根据强度和刚度理论计算其主要参数,构造其工作部件.以2个速度水平和3个含水率条件下进行测试,含水率为25％,模具速度分别为497 r/min和718 r/min时,生产率最高可达34.8、38.8 kg/h.该机器操作简单方便,可以供中小型农户根据农业副产品定制饲料,降低农户外购饲料成本.

在图书馆和信息科学领域,大数据已经引起了研究人员的极大关注.图书馆以数字形式保存数据或信息,作为联系用户、研究机构、高等学校和政府的重要纽带,学习理解大数据以及如何利用大数据促进基础研究,如何利用大数据为组织创造竞争优势,如何通过创建分类法使大数据可见、可访问和可用非常重要.采用文献分析法,就大数据技术与图书馆业务的相关性进行分析,为今后的工作提供一定的参考.

将机器人教育纳入大学生创新创业课程体系,改变传统教育理念,建立"四个灵活"内涵式培养大学生创新创业能力新模式.进而培养大学生解决问题、逻辑思考、批判性思考和创造力等方面的能力,提高学生学习的内驱动力,提升学生自主学习意识,努力造就一批青年科技人才和科技创新团队.

管理学课程教学质量提升受到三重约束,即课时安排的时间约束、师生间信息不对称的约束和校方教学平台构建的空间约束.在此基础上,将管理学教学质量的提升置于多维视角中进行剖析.通过高校、教师和学生的通力合作,构建三重约束下管理学教学质量提升的激励模式,并进一步分析了其保障机制,提出了相应的对策建议.

A multi-item inventory problem under the two-level credit trade condition is studied by assuming that the retailer's credit payment period is positively related to the order quantity,and a multi-items inventory model is established.The optimal ordering strategy of the retailer is given through the analysis of the model.Finally,the validity of the model is verified by numerical examples.

针对我国农村小学数学有效课堂教学推进滞后的现状,从读懂教材、把握教材本质,培养习惯、建立有序教学,自主探究数学活动和以反思促提升四个方面,对农村小学数学课堂教学效果的改善和提高进行深入探索.

国家教委在《关于当前积极推进中小学实施素质教育的若干意见》中解释,"素质教育是以提高民族素质为宗旨的教育.……以注重培养受教育者的态度、能力、促进他们在德智体等方面生动、活泼、主动地发展为基本特征的教育."[1]随着《中共中央国务院关于深化教育改革,全面推进素质教育的决定》(1999年6月13日)的颁布,吹响了我国素质教育前进的号角.本文从课堂教学中学生主体作用的缺失出发,从学习氛围的营造和关注学生的再创造两个方面探讨了学生主体参与课堂教学的策略.

建立了一类预订销售和信用支付策略相结合的变质物品的库存模型,其中,产品需求与价格相关,变质率和取消预订率都为常数.证明了最优订购策略的存在性和唯一性,并给出了数值算例和参数的灵敏度分析.

The EPQ model based on two levels of trade credit policy,the vast majority of the model is considered the single item.Because of the diversity of demand,the inventory model for multi-item is being more and more inventory management attention.We assume that the retailer is only provided to the customer part of his/her payment deferred payment under the condition of two levels of trade credit.An EPQ model for multi-item under retailer partial deferred payment is established.It proves that the model has a unique optimal solution.Finally,numerical examples are given to illustrate the validity of this model.

A non-multi-cycle inventory model for deteriorateing items with advance sales over the finite time level is established, Then, use dynamic programming method to solve the model, in which demand rate are time-varying and price-dependent, allowing cancellation but paying cancelling fee. For a given ordering time, we get that the profit function is a concave function with sales price and the optimal replenishment policy is presented and a simple algorithm to hunt for the optimal sales policy is given. Finally, we give a numerical example to describe effectiveness about the model.

Combined with the latest developments of basic education reform,this paper analyzes the current shortage of professional training system of specialist mathematics education. From pre-service education course structure,teaching methods and professional skills training,etc.,the paper explores the concept of policy under the new primary curriculum specialist professional training in Mathe?matics Education .

This article sets examples of several problems in elementary mathematics solving from knowledge,thoughts and methods of High Viewpoints. We should learn the divergent thinking from High Viewpoints to solve elementary mathematics problems,because this would be a new horizon of solving mathematics problems.

In this paper, on the assumption that the demand rate was an exponential increasing function of time, we built the deteriorating article inventory model whose two-echelon credit payment was dependent on the ordering volume, then analyzed the existence and uniqueness of the optimal solution of the model, and at the end, gave a numerical example to test the validity of the model.

Teachers'post vocational training is an important approach to promote teachers'professional development. This training should be tailored and set up reasonable growth path according to the actual situation of the training object and specific needs in the as?pects of training goal,content and way in order to make those teachers get progress and development.

In this paper, upon the premise that the supplier allows the partial delay in payment of the retailer, we discussed the stochastic dynamic inventory decision-making problem of a risk-neutral retailer that made cyclic ordering of a product to meet the uncertain demand for it, built the inventory model that optimized its replenishment and financing strategies so as to maximize the expected fund level of the retailer at the end of a term, and at the end, presented a numerical example to analyze the optimal initial investment and the optimal inventory level.

我国现行的非政府组织登记管理制度是双重管理体制,严重制约了非政府组织的积极发展,阻碍了非政府组织发挥其积极作用.提出构建政府与非政府组织新型互动关系、建立直接申请登记制、完善对非政府组织的监管等策略,创新非政府组织的登记管理制度.

In this paper, under the circumstance where the product inventory-holding cost was variable, we built the perishable item inventory model for the multiple orderings within a finite planning period, of which the demand rate was influenced by price and inventory level. At the end, we proved the existence of the optimal solution of the model and designed a suitable algorithm for its solution.

Building an innovating team on the research of mathematics education is not only the needs of current social development, but also the needs of mathematics teachers’pre service,in-service education in basic education. Taking Liuzhou Teachers College as an example,this paper puts forward the basic thought of building an innovating team on the research of mathematics education,including the team’s guiding ideology and development objectives,structure,training,institution building and resource sharing,etc.. Finally,some view-points about the problems existing in practice are forward.

高职高专数学建模课程参与式教学的应用是大学数学教育的一个探索和革新,实践证明,其有效的激发了学生学习数学和应用数学的兴趣,为学生的进一步发展奠定了良好的数学基础.