Theoretical and Natural Science最新文献_第3页

Advancements in homogeneous charge compression ignition technology: Efficiency, emissions, and applications in the modern automotive industry 均质电荷压缩点火技术的进步：现代汽车工业的效率、排放和应用

Theoretical and Natural Science Pub Date : 2024-04-02 DOI: 10.54254/2753-8818/31/20240962

Zicheng Tian

{"title":"Advancements in homogeneous charge compression ignition technology: Efficiency, emissions, and applications in the modern automotive industry","authors":"Zicheng Tian","doi":"10.54254/2753-8818/31/20240962","DOIUrl":"https://doi.org/10.54254/2753-8818/31/20240962","url":null,"abstract":"Homogeneous charge compression ignition (HCCI) technology is a novel approach in internal combustion engines that combines the efficiency of gasoline engines with the spontaneous ignition characteristics of diesel engines. HCCI engines offer cleaner emissions, reduced noise, and wider fuel adaptability, overcoming many drawbacks of traditional engines. The paper explores the HCCI combustion process, highlighting its unique features and advantages over spark ignition (SI) and compression ignition (CI) engines. It also discusses innovations in HCCI technology, including its combination with other strategies like spark-controlled compression ignition (SCCI) and low-temperature combustion (LTC) to expand its load range. The challenges of HCCI technology, especially in combustion timing control, are addressed, along with suggestions for future research directions. The application of HCCI technology for energy savings and emission reduction and its impact on the automotive industry are also discussed, citing examples from manufacturers like Volvo, Nissan, and General Motors. The paper concludes by emphasizing the importance of ongoing research, integration with other technologies, and financial support to further advance HCCI technology and its market potential.","PeriodicalId":489336,"journal":{"name":"Theoretical and Natural Science","volume":"43 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140751990","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

Investigating the role of Java Frameworks in enhancing web UI design with the design thinking method 研究 Java 框架在利用设计思维方法增强网络用户界面设计方面的作用

Theoretical and Natural Science Pub Date : 2024-04-02 DOI: 10.54254/2753-8818/34/20241174

Jiaxin Zhou

{"title":"Investigating the role of Java Frameworks in enhancing web UI design with the design thinking method","authors":"Jiaxin Zhou","doi":"10.54254/2753-8818/34/20241174","DOIUrl":"https://doi.org/10.54254/2753-8818/34/20241174","url":null,"abstract":"The purpose of this study is to investigate how the Wix platform and JavaScript collaborate to create user interfaces (UI) for educational blogs that are robust and simple to operate. The purpose of this study is to investigate the extent to which Java technologies, particularly Spring and Hibernate, might enhance user interface designs on the Wix platform. The study also focuses on the significance of striking a balance between design and technology. Through the incorporation of tools for online lesson preparation and time management, the project intends to improve the overall quality of the user experience. This is because educational applications have challenges that are unique and need to be eliminated. Using Java technologies like Spring, Hibernate, and Jakarta Faces, the research project involves the creation of an instructive blog. The research makes use of the Design Thinking methodology and takes a human-centered approach to its methodology. To facilitate user comfort, aesthetic appeal, and efficient interaction, the design makes use of visual harmony, simplicity, and refinement at various points throughout. In the context of this research, the use of wireframing, high-fidelity mockups, and prototype assembly on the Wix platform helps the growth of the internet as well as the development of instructional resources. One of the objectives of this project is to develop a design for an educational blog that is consistent and visually appealing.","PeriodicalId":489336,"journal":{"name":"Theoretical and Natural Science","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140754702","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

Design and implementation of Java-based business shopping web page 设计和实施基于 Java 的商业购物网页

Theoretical and Natural Science Pub Date : 2024-04-02 DOI: 10.54254/2753-8818/34/20241169

Maishi Huang

引用次数: 0

An enhancement methodology for predicting transaction amounts for freelancers on freelance platforms: Based on sentiment analysis 预测自由职业者平台上自由职业者交易金额的改进方法：基于情感分析

Theoretical and Natural Science Pub Date : 2024-04-02 DOI: 10.54254/2753-8818/34/20241167

Hongbin Zhang

{"title":"An enhancement methodology for predicting transaction amounts for freelancers on freelance platforms: Based on sentiment analysis","authors":"Hongbin Zhang","doi":"10.54254/2753-8818/34/20241167","DOIUrl":"https://doi.org/10.54254/2753-8818/34/20241167","url":null,"abstract":"Freelancing is a type of labor arrangement in which independent freelancers use their discretionary time to perform ad hoc tasks, usually of a single nature, with the aim of getting paid. This study proposes an augmented method for predicting the amount of freelance transactions using textual sentiment analysis. First, a unique feature labeled Freelancer Sentiment was selected to summarize the positive or negative sentiment orientation of freelancers. Subsequently, Naive Bayes algorithm is applied to process the text data from the freelancers platform to finally develop a Model for Computing Word Sentiment Values. The model helps to accurately calculate the sentiment values associated with emotional words. Finally, the Word Frequency-Inverse Document Frequency (TF-IDF) algorithm is used to construct the Text Sentiment Value Calculation Model, so as to accurately calculate the sentiment values of freelancers. The results of the comparison experiments of the five commonly used prediction models show that the mean squared error (MSE) of the model that includes the freelancer sentiment feature is significantly reduced by 6%-11% compared with the model that does not include the freelancer sentiment feature. This study contains theoretical explorations and practical implications. First, the proposed approach of extracting features from textual data to build predictive models provides a valuable reference for future enhancement of predictive modeling on freelance platforms, especially those that rely on unstructured data. Second, incorporating textual sentiment value features relevant to freelancers can significantly improve the accuracy of predicting transaction amounts. Third, the calculation of word and text sentiment values employs a series of algorithms that target specific features of the freelancer platforms text data. This approach is important for improving the accuracy of feature value calculation.","PeriodicalId":489336,"journal":{"name":"Theoretical and Natural Science","volume":"86 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140752412","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

River water injecting into sea: Movement of sediments in stable stratified flows 河水注入大海稳定分层流中的沉积物运动

Theoretical and Natural Science Pub Date : 2024-04-02 DOI: 10.54254/2753-8818/34/20241125

Suni Yao

引用次数: 0

European Option Pricing Based on FSDE Driven by Fractional Brownian Motion 基于分数布朗运动驱动的 FSDE 的欧式期权定价

Theoretical and Natural Science Pub Date : 2024-04-02 DOI: 10.54254/2753-8818/34/20241190

Qingyang Shu

引用次数: 0

A historical analysis of the independent development of calculus by Newton and Leibniz 牛顿和莱布尼兹独立发展微积分的历史分析

Theoretical and Natural Science Pub Date : 2024-01-15 DOI: 10.54254/2753-8818/30/20240739

Jinxi Li

{"title":"A historical analysis of the independent development of calculus by Newton and Leibniz","authors":"Jinxi Li","doi":"10.54254/2753-8818/30/20240739","DOIUrl":"https://doi.org/10.54254/2753-8818/30/20240739","url":null,"abstract":"This paper undertakes a historical investigation of the separate and independent development of calculus by Isaac Newton and Gottfried Leibniz in the late 17th century. Through analysis of primary sources and historiographical perspectives, it explores the differences in notation, methods, and applications used by each mathematician to formulate foundational concepts of calculus. The research demonstrates that Newton relied more on geometric intuition, developing calculus concepts like fluxions and fluents rooted in kinematic problems. His 1687 Philosophiae Naturalis Principia Mathematica synthesized many calculus innovations. Meanwhile, Leibniz approached calculus from an algebraic mindset, utilizing infinitesimal differentials and comprehensively explaining integral and differential calculus in publications like Nova Methodus pro Maximis et Minimis. Evaluation of letters and documents from the 1670s and 1680s shows no direct collaboration or communication about calculus between Newton and Leibniz. This lack of transmission, coupled with the disparities in their notation and calculus techniques, provides evidence for independent creation. However, Newton and Leibniz shared key insights regarding rates of change, derivatives and integrals, hinting at a broader zeitgeist in early modern mathematics and science. Thus, this dual achievement illustrates how the Scientific Revolution facilitated conceptual convergence despite geographic separation between great thinkers. Investigating this case study offers perspective on the interplay between individual genius and wider social contexts in driving scientific progress. This paper concludes by assessing the legacy of the Newton-Leibniz debate over priority and analyzing work that paved the way for modern unified calculus notation and applications.","PeriodicalId":489336,"journal":{"name":"Theoretical and Natural Science","volume":" 37","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139621406","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

Low noise, analog electrocardiogram signal amplifier for wearable equipment 用于可穿戴设备的低噪声模拟心电图信号放大器

Theoretical and Natural Science Pub Date : 2024-01-15 DOI: 10.54254/2753-8818/30/20240934

Chenghao Zhao

引用次数: 0

The recovery time complexity of a coin weighing algorithm 硬币称重算法的恢复时间复杂度

Theoretical and Natural Science Pub Date : 2024-01-15 DOI: 10.54254/2753-8818/30/20241106

Hanxuan Wang

引用次数: 0

Improvement and optimization of spacecraft environmental control and life support systems 改进和优化航天器环境控制和生命保障系统

Theoretical and Natural Science Pub Date : 2024-01-15 DOI: 10.54254/2753-8818/30/20241090

Zehang Wang

{"title":"Improvement and optimization of spacecraft environmental control and life support systems","authors":"Zehang Wang","doi":"10.54254/2753-8818/30/20241090","DOIUrl":"https://doi.org/10.54254/2753-8818/30/20241090","url":null,"abstract":"Environmental control and life support systems (ECLSS) are essential for the triumph of human spaceflight missions, furnishing astronauts with crucial resources like breathable air, purified water, nourishment, and protection from radiation. The unique and challenging space environment, coupled with the critical nature of ECLSS components, necessitates a high degree of reliability to prevent catastrophic failures. This paper conducts a comprehensive examination of various ECLSS subsystems, including air revitalization, water processing, food storage, waste management, and radiation shielding. Gaining perspectives from historical missions like Apollo, Skylab, and the International Space Station (ISS), the research outlines strategic approaches to improve the fault tolerance of ECLSS. The implementation of advanced simulation modeling, strategic component redundancy, and improved subsystem interconnectivity are posited as pivotal measures to bolster the reliability of ECLSS. These improvements are vital to guarantee the safety and viability of prolonged space missions to the Moon, Mars, and beyond, thereby facilitating humanitys ongoing exploration of the universe.","PeriodicalId":489336,"journal":{"name":"Theoretical and Natural Science","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139621037","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