Modern Applied Science最新文献_第10页

Recent Advance in Anaerobic Co-digestion Technology: A Review 厌氧共消化技术研究进展

Modern Applied Science Pub Date : 2020-05-29 DOI: 10.5539/mas.v14n6p90

Andriamahefasoa Rajaonison, Ives Abel Fetra Andriatsitohaina Rabesahala, H. T. Rakotondramiarana

{"title":"Recent Advance in Anaerobic Co-digestion Technology: A Review","authors":"Andriamahefasoa Rajaonison, Ives Abel Fetra Andriatsitohaina Rabesahala, H. T. Rakotondramiarana","doi":"10.5539/mas.v14n6p90","DOIUrl":"https://doi.org/10.5539/mas.v14n6p90","url":null,"abstract":"Due to their polluting characteristics, fossil fuels presently tend to be replaced by renewable energy resources. Anaerobic digestion is a recent technology for producing biofuels. As a biochemical method to produce biogas, it is more environmentally friendly than other processes and is almost non-polluting. The anaerobic co-digestion is an upgrade of the mono-digestion since some limitations of the single-substrate degradation were solved by digesting two or more substrates. The present review gives an overview of the progress made in the anaerobic co-digestion technology. Appearing as a complex technology, lots of factors can affect its operation. Those factors include the choice and the composition of the substrates, the ratio between the substrates and the inoculum, the pretreatment, the environmental conditions, the operational parameters, and the post-treatment at the end of the process. Analytical and empirical tools for the assessment of the whole system in terms of biodegradability and synergy of the substrates, the efficiency of the process, and the identification of the operation inhibitors are also presented in this paper.","PeriodicalId":18713,"journal":{"name":"Modern Applied Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77546515","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: 2

Reviewer Acknowledgements for Modern Applied Science, Vol. 14, No. 5, May 2020 《现代应用科学》，第14卷第5期，2020年5月

Modern Applied Science Pub Date : 2020-04-30 DOI: 10.5539/mas.v14n5p94

Sunny Lee

引用次数: 0

Analysis of Coordinates Decoupling of Multi-Dimensional Precision Optical Adjusting Frame in Optical Alignment 光学对准中多维精密光学调节架的坐标解耦分析

Modern Applied Science Pub Date : 2020-04-22 DOI: 10.5539/mas.v14n5p29

Yong Luo

{"title":"Analysis of Coordinates Decoupling of Multi-Dimensional Precision Optical Adjusting Frame in Optical Alignment","authors":"Yong Luo","doi":"10.5539/mas.v14n5p29","DOIUrl":"https://doi.org/10.5539/mas.v14n5p29","url":null,"abstract":"Information technology has much promoted the development of optical technology. With the help of computer technology, people can design and manufacture more complex optical systems than before, to obtain ideal imaging quality. The complexity of the optical system brings enormous challenges to optical alignment. Optical system alignment is the crucial link of transforming the excellent optical design into instruments with good performance in reality. Precision alignment of an optical system requires precise adjustment of each component's degree of freedom using a specific adjusting mechanism. Due to the quantification and compensation correction for the coordinates coupling relationship among each dimension adjusting freedom of the adjusting frame can not be carried out. Generally, the coordinates coupling problem is usually ignored in optical system alignment, to cause the optical adjustment error. This paper carries out an analysis for the coupling relationship among each dimension motion freedom of multi-dimensional precision optical adjusting frame in details by mathematical modeling and simulation, the decomposed transformation for each dimension adjusting mount of multi-dimensional precision optical adjusting frame, and the compensation correction for the coordinates coupling among each dimension adjusting mount. The test results show that this method can effectively reduce the difference between the actual mechanical adjusting mount and the expected optical adjusting mount, to achieve more accurate optical adjustment.","PeriodicalId":18713,"journal":{"name":"Modern Applied Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77249600","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

Reviewer Acknowledgements for Modern Applied Science, Vol. 14, No. 4, 2020 《现代应用科学》，2020年第4期

Modern Applied Science Pub Date : 2020-03-31 DOI: 10.5539/mas.v14n4p124

Sunny Lee

引用次数: 0

Spatial-temporal Dynamics of Population Aggregation during the Spring Festival based on Baidu Heat Map in Central Area of Chengdu City, China 基于百度热图的成都市中心城区春节人口聚集时空动态

Modern Applied Science Pub Date : 2020-03-20 DOI: 10.5539/mas.v14n4p44

Yunjiao Zhou

{"title":"Spatial-temporal Dynamics of Population Aggregation during the Spring Festival based on Baidu Heat Map in Central Area of Chengdu City, China","authors":"Yunjiao Zhou","doi":"10.5539/mas.v14n4p44","DOIUrl":"https://doi.org/10.5539/mas.v14n4p44","url":null,"abstract":"The application of location-aware devices and location-based services enables big data to provide a convenient and efficient way to study the dynamics of urban population distribution. Based on the Baidu heat map data, the spatial-temporal population aggregation in the main urban areas of Chengdu City was explored in the context of the Spring Festival. The results suggested that population aggregation showed regular fluctuation within a day, consistent with the commuting activities. Also, population mobility showed difference before, during and after the festival; population density during the holiday was significantly lower than that on the other two working days, meanwhile the heat value on the working day before the festival was slightly higher than that after the festival. The conclusion showed that the Spring Festival affected the population distribution density. Chinese government’s emergent measures taken to suppress the nationwide spread of COVID_19 at early 2020 also had great influence on the low population aggregation during and after the Spring Festival, indicating the effectiveness of emergency control of human interactions. Better understanding of Spatial-temporal dynamics of population aggregation during the Spring Festival is of great value for optimizing the city expansion and structure planning.","PeriodicalId":18713,"journal":{"name":"Modern Applied Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81042799","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: 4

Influencing Performance Measurements through Varying Packet Capacities of Queue Nodes - DRED 通过改变队列节点的分组容量影响性能测量- DRED

Modern Applied Science Pub Date : 2020-03-16 DOI: 10.5539/MAS.V14N4P23

Jafar Ababneh

引用次数: 0

Attitudes of Students and Faculty Members at Israa University towards Distance Learning in Light of the Corona Pandemic 鉴于冠状病毒大流行，以色列大学师生对远程学习的态度

Modern Applied Science Pub Date : 2020-01-18 DOI: 10.5539/MAS.V15N1P122

Abdulrahman Al-Yamani, Safia M. Jabali

{"title":"Attitudes of Students and Faculty Members at Israa University towards Distance Learning in Light of the Corona Pandemic","authors":"Abdulrahman Al-Yamani, Safia M. Jabali","doi":"10.5539/MAS.V15N1P122","DOIUrl":"https://doi.org/10.5539/MAS.V15N1P122","url":null,"abstract":"This study aimed to identify students' attitudes and faculty members at Israa University towards distance learning in light of the Corona pandemic. A questionnaire was developed that included two pictures (student photo/faculty member photo). Each image in the questionnaire consisted of (30) items distributed into three areas: Learning and teaching, assessment and testing, and learning and communication management, where acceptable coefficients of validity and reliability were achieved for the two questionnaire images, and applying them to an available sample of Al-Isra University students and faculty members, consisted of (365) male and female students, and (119) faculty members during the first semester of the academic year (2020-2021 AD). The study results revealed that the attitudes of students and faculty members at Israa University towards distance learning in light of the Corona pandemic came at a medium level. The presence of statistical differences in students' attitudes at Israa University towards distance learning due to the gender variable and the differences were in favor of males. There were no statistically significant differences in Al Isra University students' attitudes towards distance learning due to the vari of college. The variablee results also revealed no statistically significant differences in the faculty members' attitudes at Al-Isra University towards distance learning due to the variable of academic rank. In light of the study results, the researchers recommended developing the values of self-awareness and twenty-first-century skills such as self and continuous learning, and interest in developing distance learning applications and platforms, and conducting future studies on distance learning and the effectiveness of educational platforms and electronic applications in light of various variables.","PeriodicalId":18713,"journal":{"name":"Modern Applied Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77059955","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: 1

Study of Optical MIMO Transmission Systems Using the MGDM Multiplexing Technique 基于MGDM复用技术的光MIMO传输系统研究

Modern Applied Science Pub Date : 2019-12-26 DOI: 10.5539/mas.v14n1p34

N. Elhajrat, O. Elouatssi, A. Abbassi, F. Essahlaoui, M. Aftatah

引用次数: 2

A Proposed Educational Role for Jordanian Universities to Integrate Education into Sustainable Development in the Educational Learning Process 建议约旦大学在教育学习过程中将教育纳入可持续发展的教育作用

Modern Applied Science Pub Date : 2019-11-14 DOI: 10.5539/mas.v13n12p30

M. Nadi

{"title":"A Proposed Educational Role for Jordanian Universities to Integrate Education into Sustainable Development in the Educational Learning Process","authors":"M. Nadi","doi":"10.5539/mas.v13n12p30","DOIUrl":"https://doi.org/10.5539/mas.v13n12p30","url":null,"abstract":"This study well shed some light on a proposed role for Jordanian universities to integrate education on sustainable development in the educational learning process, the study used the descriptive method, and a questionnaire of (30) terms has been set. \u0000 \u0000 The validity of the tool was verified. 300 faculty members from Jordanian official universities namely: Jordan, Yarmouk and Mutata University, were randomly selected. The study concluded the following results: \u0000 \u0000-The opinion of the faculty members of Jordanian universities on the idea of integrating education with sustainable development in the educational process was moderate. \u0000 \u0000- The study showed differences in statistical semantics, depending on the type of the faculty, academic rank and gender, where these indications favored the scientific colleges, professorship rank and female sex. \u0000 \u0000- The study hopes that the Ministry of Higher Education will take the concept of sustainable development in the educational process to enhance cooperation between universities and public and private institutions in society, in order to develop new and innovative disciplines that meet the needs of the new stage.","PeriodicalId":18713,"journal":{"name":"Modern Applied Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75683098","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

Consumers Trust, Privacy and Security Issues on Mobile Commerce Websites 移动商务网站的消费者信任、隐私和安全问题

Modern Applied Science Pub Date : 2019-11-11 DOI: 10.5539/mas.v13n12p21

Mohammad awni ahmad mahmoud, Laith T. Khrais, Rasha mohammad alolayan, Asyah Muzahim Al-Kaabi, Sara qasem Al suwaidi, B. Alghamdi, Hadeel Fouad Aljuwaie

引用次数: 2