Academic Journal of Mathematical Sciences最新文献_第4页

The Fusion of GeoGebra and High School Mathematics Culture 地理学与高中数学文化的融合

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2023.040302

Fenglin Wu, Zhiwang Liu

引用次数: 0

Research on the issue of maternity policy 生育政策问题研究

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2022.030101

Chen Yunuo, Yu Zhouze, Song Jingwei

引用次数: 0

Mathematical modeling and dynamic trading strategies for gold and bitcoin 黄金和比特币的数学建模和动态交易策略

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2022.030107

Yan Chenge, Wu Zebin, Gan Haoyu, Zhu Ziwen

{"title":"Mathematical modeling and dynamic trading strategies for gold and bitcoin","authors":"Yan Chenge, Wu Zebin, Gan Haoyu, Zhu Ziwen","doi":"10.25236/ajms.2022.030107","DOIUrl":"https://doi.org/10.25236/ajms.2022.030107","url":null,"abstract":": In recent years, the gold-bitcoin market and corresponding trading strategies have received more scholarly attentions. Predicting gold and bitcoin prices from historical data is a specific stream in this academic area. Many scholars have used financial methods or statistical methods to construct trading models. However, one of the limitations is that few previous studies combined both financial and statistical methods. Therefore, the present study aims to build a mathematical model that predicts price dynamics of gold and bitcoin and utilizes some connections between finance and statistics. To achieve this goal, some financial indicators were computed and Holt-Winters’ Model was applied. The research result shows that a trading strategy can be developed with the help of our proposed model and trading shrink ratio, which functions as the risk controller. The sensitivity test indicates that the proposed model has little sensitivity towards commission fees, which means that the model can be widely used in similar situations. In general, this study outlines an analytical approach to evaluate profits in gold-bitcoin market. Traders can generate considerable profits from the proposed trading strategy.","PeriodicalId":372277,"journal":{"name":"Academic Journal of Mathematical Sciences","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124213118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Center-focus identification of quasi-homogeneous polynomial planar rigid system 拟齐次多项式平面刚性系统的中心焦点辨识

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2022.030105

H. Tan

引用次数: 0

Spatial and Temporal Evolution of Population-Weighted PM2.5 Concentration and Its Influencing Factors in China from 2000 to 2021 2000 - 2021年中国人口加权PM2.5浓度时空演变及其影响因素

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2023.040201

Zhe Wei, Shaoxiong Wu

{"title":"Spatial and Temporal Evolution of Population-Weighted PM2.5 Concentration and Its Influencing Factors in China from 2000 to 2021","authors":"Zhe Wei, Shaoxiong Wu","doi":"10.25236/ajms.2023.040201","DOIUrl":"https://doi.org/10.25236/ajms.2023.040201","url":null,"abstract":": The repeated occurrences of severe haze in China in recent years have drawn increased attention from the public and government departments to the impact of pollutants on public health. In order to investigate the spatial and temporal distribution patterns and risks of PM2.5 population exposure levels in various regions of China, based on population-weighted PM2.5 concentration data, spatial autocorrelation analysis and geographic detector methods are used to reveal its overall spatial and temporal evolution patterns and local variation characteristics. The specific influences and interactions of population-weighted PM2.5 concentrations in China are also studied in four dimensions: socio-economic, climatic, geographic environment and policy. Finally, projections of population-weighted PM2.5 concentrations in China from 2019 to 2021 are made based on the main influencing factors. The study shows that (1) China's population-weighted PM2.5 concentrations decreased year by year from 2000 to 2018. (2) Spatial clustering of population-weighted PM2.5 concentrations in China is evident. (3) The population-weighted PM2.5 concentration in China showed a spatially heterogeneous pattern between 2000 and 2018. (4) At the national scale, the factor with the greatest explanatory power of China's population-weighted PM2.5 concentration is the average temperature. The interactions between the factors mainly show two types of interactions: two-factor enhancement and non-linear enhancement. (5) A prediction model of China's population-weighted PM2.5 concentration was established to predict the population-weighted PM2.5 concentration from 2019 to 2021 with high accuracy.","PeriodicalId":372277,"journal":{"name":"Academic Journal of Mathematical Sciences","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114837063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How Can Random Walk Be Applied to Analysis Stock 随机漫步如何应用于股票分析

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2022.030205

NG Puishuen, J. Suo

引用次数: 0

Rational mining & Better future 理性开采，美好未来

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2022.030109

Xiankui Meng, Miaoling Lin, Wenjie Zheng

{"title":"Rational mining & Better future","authors":"Xiankui Meng, Miaoling Lin, Wenjie Zheng","doi":"10.25236/ajms.2022.030109","DOIUrl":"https://doi.org/10.25236/ajms.2022.030109","url":null,"abstract":"UK Abstract: This paper addresses the issue of global equity under asteroid mining by first giving a definition of global equity: what you deserve matches what you get. Based on this, TOPSIS evaluation is used to assign scores to selected countries, and an allocation coefficient model is used to study the relationship between five indicators and country scores related to asteroid mining, and a sensitivity analysis is conducted to conclude that changes in indicators have a high impact on global equity. At this point, if global equity is to be achieved, the allocation rules must be specified with new allocation coefficients. Finally, this paper proposes scientific and constructive policies based on the above results, which are important for asteroid mining to benefit the world. The most important feature of this paper is to quantify global equity, and the established gray model and coefficient distribution model solve the difficulties of uncertainty of future asteroid mining, which are normative and easy to operate. At the same time, the established model can be extended to the scoring situation of countries based on various indicators, which can play a reference role in the formulation of future world equity policies.","PeriodicalId":372277,"journal":{"name":"Academic Journal of Mathematical Sciences","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116533101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Characteristic Analysis of Order Statistics under Exponential Distribution 指数分布下有序统计量的数值特征分析

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2022.030204

Xiaobo Wen

引用次数: 0

Mathematical Model for Ordering and Transporting Raw Materials for Production Companies 生产企业原材料订购与运输的数学模型

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2022.030208

Liang Gao, L. Cheng, Yanxiang Wang, Zhenwei Ma

{"title":"Mathematical Model for Ordering and Transporting Raw Materials for Production Companies","authors":"Liang Gao, L. Cheng, Yanxiang Wang, Zhenwei Ma","doi":"10.25236/ajms.2022.030208","DOIUrl":"https://doi.org/10.25236/ajms.2022.030208","url":null,"abstract":": This paper analyzes the problem of ordering and transporting raw materials for production in an enterprise, and uses a linear programming model to solve the following problems: (1) The problem that suppliers cannot supply goods according to demand is solved. We use the TOPSIS evaluation model to weight each supplier according to different indicators to derive the importance value of suppliers and select 50 suppliers that meet the requirements. We analyze the data and calculate the minimum number of suppliers to supply raw materials to meet the demand of production, and construct a linear programming model to calculate the number of suppliers with the lowest cost under the condition of guaranteed capacity. (2) To solve the problem of certain loss of raw materials during transportation, we first consider the ordering quantity, price, transportation loss in transit, and storage price of raw materials; then we analyze the data and construct a multi-objective planning model, and find the final ordering plan and transit plan through a large amount of data analysis; finally, we analyze the feasibility of the plan. (3) In order to maximize the production capacity of the enterprise, the maximum supply quantity of the supplier is obtained through analysis, and the ordering scheme is determined by combining the supplier's past performance; the transshipment scheme is determined according to the ordering scheme and the transshipment loss rate.","PeriodicalId":372277,"journal":{"name":"Academic Journal of Mathematical Sciences","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114969811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the productivity performance of NBA players and its influence factor NBA球员生产力绩效及其影响因素研究

Academic Journal of Mathematical Sciences Pub Date : 1900-01-01 DOI: 10.25236/ajms.2023.040305

Xuanwu Wang, Juntao Shen, Jiaye Hou

引用次数: 0