回归学生需求的小学数学教学

数学教学要符合学生需求,这是多 年来人们都在遵从的教学原则。但在一定的时段 随着改革浪潮的翻滚,人们对原则的遵从产生了 一些问题,对学生发展带来一定的影响。我们在教 学中思考着数学教学回归学生需求的问题,对学 生的发展起了一定的促进作用。

基于GM(1,1)模型的企业融资需求预测

一些企业在预测融资需求时大多采用销售百分比法,虽然简单方便,但是其基本假设与现实不很相符,实用性较差。GM(1,1)灰色预测模型建模所需信息较少,而模型精度较高,是处理小样本预测问题的有效工具。因此本文运用GM(1,1)模型来预测企业融资需求,克服了传统方法的缺陷,提高了企业财务预测的准确度。

浅析河南旅游纪念品的设计与开发

从河南旅游纪念品的市场出发,分析造成河南旅游纪念品设计水平低、地域特色不明显的原因,并结合旅游纪念品对于游客的购买动机分析,论述了河南旅游纪念品设计与开发的文化性和时代性,提出了设计师需回归到对人的生活方式的本质认识去实现河南旅游纪念品的设计与开发。

出租车资源优化配置的研究

本文针对"打车难"这个社会问题,运用主成分分析的方法选取了合理的指标,建立了供给需求综合评估模型,并以天津市为例分析了其供求匹配程度。最后,通过打车费用的最优解设计缓解"打车难"的补贴方案。

Prediction of Demand and Tendency of the Book Market in China

The prediction model of the demand of the book market in China from the quantitative angle is established,and the total demand of the books for years from 2002 to 2004 is predicted.The effects of the gross domestic product,household consumption,price and population on the demand of books are also analyzed.In the end,it is summarized that the acceleration of the development of Chinese book industry,the refinement of the books,the innovation of the advertisement,the series of the structure and the steady increase of the price will become the remarkable characteristics of the book market.

不同协作模式下的多级供应链动态优化

在一阶自回归需求和定购点策略的假设组合下研究了多级供应链的协作模式,即通过对成员企业定购策略、提前期、需求模式等信息的共享来优化供应链整体绩效。与以往研究不同,文中引入的成本目标函数涉及相互冲突的定购量和实际库存动态变化,并针对全局优化模式和无私零售商模式下的多级供应链绩效分别进行了详细分析。与全局优化模式相比,无私零售商模式对信息共享的深度放宽且对总利润再分配机制的要求简化。进一步的数量研究表明,无私零售商模式虽非最优,却可在制造商不必作出定购策略再设计的情况下,得到比传统定购模式更合理的整体绩效。

Forecast of Air Traffic Controller Demand Based on SVR and Parameter Optimization

As the main body of air traffic control safety,the air traffic controller is an important part of the whole air traffic control system. According to the relevant data of civil aviation over the years,a mapping model between flight support sorties and air traffic controller demand is constructed by using the prediction algorithm of support vector regression(SVR) based on grid search and cross-validation. Then the model predicts the demand for air traffic controllers in seven regions. Additionally,according to the employment data of civil aviation universities,the future training scale of air traffic controller is predicted. The forecast results show that the average relative error of the number of controllers predicted by the algorithm is 1.73%,and the prediction accuracy is higher than traditional regression algorithms. Under the influence of the epidemic,the demand for air traffic controllers will decrease in the short term,but with the control of the epidemic,the demand of air traffic controllers will return to the pre-epidemic level and gradually increase. It is expected that the controller increment will be about 816 by 2028. The forecast results of the demand for air traffic controllers provide a theoretical basis for the introduction and training of medium and long-term air traffic controllers,and also provide method guidance and decision support for the establishment of professional reserve and dynamic control mechanism in the air traffic control system.

借助数形结合突破笔算乘法——以《两位数乘两位数笔算乘法(不进位)》为例

数学教学需要学生运用数学思想进行数学思考,解决数学问题。数学是比较抽象和复杂的,给学生学习数学、学到有价值的数学,获取充分的发展带来一定的困难。虽然学生不一定明确数学学习的意义和目的,但需求数学学习内容的具体、形象和简单是必然的。数学教学必须回归学生需求,作为数学教师,必须研究回归学生需求的教学策略。