Science Discovery最新文献_第9页

Exploration on the Evaluation of Guangdong's Marine Ecological Resources Asset Value 广东海洋生态资源资产价值评估探讨

Science Discovery Pub Date : 2021-05-24 DOI: 10.11648/J.SD.20210904.12

Wu Yuxi, Wang Yi

{"title":"Exploration on the Evaluation of Guangdong's Marine Ecological Resources Asset Value","authors":"Wu Yuxi, Wang Yi","doi":"10.11648/J.SD.20210904.12","DOIUrl":"https://doi.org/10.11648/J.SD.20210904.12","url":null,"abstract":"Ecological resources as maintenance system components essential human survival environment, due to its special shape has so far failed to incorporated into the national economic accounting system, to avoid unreasonable under accelerate the Marine resource utilization policy leads to the deterioration of the ecological sustainability further excessive development of Marine resources, this article from the perspective of whole ecosystem services function definition of Marine ecological resources assets, Taking Guangdong Ocean as an example to evaluate the value of its ecological resource assets and discuss its importance to sustainable development. The results show that the service value of Marine ecological resources in Guangdong province is 619.541 billion yuan, and the stock value of ecological resources assets is 166543.28 billion yuan. Oceans played a significant role in primary production, accounting for 79.62%, and also played an important role in species diversity, gene resources, disturbance regulation and climate regulation, accounting for 4.63%, 4.00%, 3.93% and 3.18% of the total value of resources, respectively. The regulating effect of Marine ecological resources can not be ignored, and pollution discharge still has a great impact on Marine water quality.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91079909","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

Analysis on Activities of Daily Living Ability and Its Influencing Factors of the Elderly in Community 社区老年人日常生活能力活动及其影响因素分析

Science Discovery Pub Date : 2021-05-24 DOI: 10.11648/J.SD.20210903.12

Yifan Cao, L. Wan, H. Ding

{"title":"Analysis on Activities of Daily Living Ability and Its Influencing Factors of the Elderly in Community","authors":"Yifan Cao, L. Wan, H. Ding","doi":"10.11648/J.SD.20210903.12","DOIUrl":"https://doi.org/10.11648/J.SD.20210903.12","url":null,"abstract":"Objective: To understand the activities of daily living (ADL) status of the elderly in Shanghai community and its influencing factors. Methods: Cluster sampling method was used to sample 8143 elderly aged 60 or above, living in a community of Jing’an District, analyze their ADL status and its influencing factors. Results: Among the individuals, about 34% of the elderly were suffered from ADL impaired, including 12% were moderately or severely dependent. Age, education level, spouse, support from family and children, indoor facilities and self-rated health were the factors that affected ADL. Conclusion: Nearly 1/3 of the elderly in the community have certain degree of ADL disability, and the risk of disability is significantly increased in the elderly aged 80 and over. Elderly with emotional support from family or children, good self-rated health or living with their spouse are tend to have a better activities of daily living. It is suggested that the community and family should pay more attention to the elderly people with risk factors, and provide them with more psychological and spiritual support and help. It can provide reference for improving the quality of life of the elderly and making relevant pension service policies","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87537884","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

Interpretation of Chinese and American Guidelines for Diagnosis and Treatment of Thyroid Diseases During Pregnancy 《中美妊娠期甲状腺疾病诊治指南》解读

Science Discovery Pub Date : 2021-05-24 DOI: 10.11648/J.SD.20210904.11

Jiang Bohua, Tao Xinli, Ouyang Zhenbo, Yan Jiane

{"title":"Interpretation of Chinese and American Guidelines for Diagnosis and Treatment of Thyroid Diseases During Pregnancy","authors":"Jiang Bohua, Tao Xinli, Ouyang Zhenbo, Yan Jiane","doi":"10.11648/J.SD.20210904.11","DOIUrl":"https://doi.org/10.11648/J.SD.20210904.11","url":null,"abstract":"More and more studies have found that thyrotoxicosis and hypothyroidism are related to adverse pregnancy outcomes, and maternal thyroid diseases also have a certain impact on fetal development. Drugs used to treat maternal hyperthyroidism can pass through the placenta and affect fetal thyroid development and thyroid function, and may cause fetal development malformations . Due to the lack of in-depth knowledge of this disease, timely screening, medical consultation and treatment rates for thyroid diseases during pregnancy are relatively low. Like this, if the treatment is not timely, it may cause irreversible effects on the pregnancy process and the fetus, such as increasing the risk of high blood pressure during pregnancy, miscarriage, premature delivery, low birth weight, stillbirth, thyroid crisis and maternal congestive heart failure, and impairing the neurological and intellectual development of offspring. This article intends to provide a reference for clinicians in the standardized diagnosis and treatment of thyroid diseases during pregnancy and postpartum through a comparative analysis of the latest guidelines for the diagnosis and treatment of thyroid diseases during pregnancy in China and the United States in 2020. It is hoped that through this article, various related complications and risks of mothers, fetuses and pregnancy caused by abnormal thyroid function will be reduced, and the quality of the population will be improved.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"114 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73939447","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

Optimal Configuration of Wind Turbine and Photovoltaic Based on Day-ahead Economic Dispatch 基于日前经济调度的风电光伏优化配置

Science Discovery Pub Date : 2021-05-08 DOI: 10.11648/J.SD.20210903.11

Bing Sun, Li Yunfei, Yuanfang Zeng

{"title":"Optimal Configuration of Wind Turbine and Photovoltaic Based on Day-ahead Economic Dispatch","authors":"Bing Sun, Li Yunfei, Yuanfang Zeng","doi":"10.11648/J.SD.20210903.11","DOIUrl":"https://doi.org/10.11648/J.SD.20210903.11","url":null,"abstract":"With the gradual increase of the penetration rate of wind and photovoltaic (PV) electricity, the power system is facing great challenges in integration and peak-shaving capacity. As flexibility resources of the system is limited, wind and PV power generation will not be consumed completely. Allowing the curtailment of the peak output of wind turbine and PV can reduce the cost of auxiliary services such as peak-shaving, relieve the huge pressure in the operation and planning of the system, and improve the overall power supply economy of the system. Firstly, the reason and optimization principle of the curtailment of the peak output of wind turbine and PV are explained. Then, a capacity optimal configuration method of power supply based on day-ahead economic dispatch is proposed. On the premise of allowing the curtailment of the peak output of wind turbine and PV, the corresponding annual power supply cost of wind turbine and PV capacity combination is calculated based on day-ahead unit commitment. The function fitting between power supply cost and wind turbine capacity is carried out. The best wind turbine and PV capacity combination is the value of the extreme point. Finally, the sensitivity analysis of example system is carried out. It is found that with the decrease of unit investment cost of wind turbine and PV equipment, developing wind and PV power generation will be a more economical choice in the future.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88671950","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

Performance Analysis of Non-uniform Sparse Segmentation Integral Method Based on Gauss Integral in EM Forward of Electrical Antenna Under Stratified Ocean 基于高斯积分的非均匀稀疏分割积分法在分层海洋下电天线电磁正演中的性能分析

Science Discovery Pub Date : 2021-04-26 DOI: 10.11648/J.SD.20210902.16

Zongyang Shi, Yiyu Zhao, X. Qu, Lichao Ma

{"title":"Performance Analysis of Non-uniform Sparse Segmentation Integral Method Based on Gauss Integral in EM Forward of Electrical Antenna Under Stratified Ocean","authors":"Zongyang Shi, Yiyu Zhao, X. Qu, Lichao Ma","doi":"10.11648/J.SD.20210902.16","DOIUrl":"https://doi.org/10.11648/J.SD.20210902.16","url":null,"abstract":"In order to solve the problem that it is difficult to take into account the computational efficiency and accuracy of electromagnetic field froward modeling of electrical antenna under the stratified ocean, evaluate the performance of two non-uniform sparse segmentation integral calculation methods based on Gauss integrals and improve the efficiency and accuracy of data interpretation in engineering applications, firstly two non-uniform sparse segmentation calculation methods based on Gauss integral nodes (Gauss-Legendre integral nodes and Gauss-Chebyshev integral nodes) are introduced. Then, two fast numerical integration methods corresponding of the time and frequency domain of the electrical antenna electromagnetic field under stratified ocean is established. Finally, by comparing and analyzing the results of the traditional uniform dense segmentation numerical integral calculation from the two aspects of computational accuracy and efficiency, the results show that two non-uniform sparse segmentation integral methods can improve the computational efficiency under the condition that the calculation accuracy is comparable, and the non-uniform sparse integral calculation method based on the Gauss-Chebyshev integral nodes is more significant than the calculation efficiency performance of the method based on the Gauss-Legendre integral node. At the same time, the general parameter setting of the non-uniform sparse segmentation integral method is given in this paper.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"228 1","pages":"47"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76096698","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

Simulation and Experiment of Underwater Target Active Electromagnetic Detection Based on SLF/ELF artificial Source 基于SLF/ELF人工源的水下目标主动电磁探测仿真与实验

Science Discovery Pub Date : 2021-04-26 DOI: 10.11648/J.SD.20210902.17

Zongyang Shi, Yiyu Zhao, Lichao Ma, Xueming Peng, Yike Xu, Shurong Guo, Meng Wang, Yuhong Wang

{"title":"Simulation and Experiment of Underwater Target Active Electromagnetic Detection Based on SLF/ELF artificial Source","authors":"Zongyang Shi, Yiyu Zhao, Lichao Ma, Xueming Peng, Yike Xu, Shurong Guo, Meng Wang, Yuhong Wang","doi":"10.11648/J.SD.20210902.17","DOIUrl":"https://doi.org/10.11648/J.SD.20210902.17","url":null,"abstract":"In view of the detection performance constraints brought by the further application of demagnation and noise reduction technology to traditional sonar and magnetic anomaly detection technology, in order to explore the possibility and detection mode of active electromagnetic (EM) detection technology applied to underwater large target detection and positioning, the active EM detection method for underwater targets based on SLF/ELF artificial EM field source is established in this paper, and the active EM detection method of underwater target is modeled and simulated by Ansys Maxwell, the magnetic anomaly field induced by underwater target is calculated and analyzed. Then, the key parameters of the underwater target active EM detection system are listed based on the simulation, and a underwater target active EM detection prototype has been developed. Finally, the simulation results and prototype parameters of the active EM detection method of underwater targets are verified by the scaled ratio experiment. The results show that the parameters of prototype system designed according to the simulation results are correct and effective, and the active EM detection technology based on SLF/ELF can be applied to the underwater large target detection.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"3 1","pages":"58"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83319215","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

Research on Production Process Parameter Management Based on MES System 基于MES系统的生产过程参数管理研究

Science Discovery Pub Date : 2021-04-26 DOI: 10.11648/J.SD.20210902.20

Zheng Chao, Wang Yan, Zhan Guangshen

{"title":"Research on Production Process Parameter Management Based on MES System","authors":"Zheng Chao, Wang Yan, Zhan Guangshen","doi":"10.11648/J.SD.20210902.20","DOIUrl":"https://doi.org/10.11648/J.SD.20210902.20","url":null,"abstract":"It is very important to realize the information management of product parameters in the production workshop, which can timely, accurately, clearly and clearly display the real-time parameter data in the production process, and ensure the efficient cooperation of various departments, so as to improve the processing efficiency and product processing quality of the production workshop. In this paper, the MES system of a military machinery manufacturing enterprise is used as the research platform to collect the product process data of the workshop and form the product parameter library of the production process of the workshop, taking the parameter library as the research object, a parameter management mechanism suitable for mechanical manufacturing enterprises is established to carry out efficient parameter management. The parameter management based on MES system consists of quality card management, parameter management, parameter optimization, parameter filling and verification, and parameter analysis. Neural network and other methods are used to optimize the selection of product parameters and analyze the historical product parameters. The application results show that the parameter management mechanism proposed in this paper can realize the effective management of the production process parameters of the manufacturing enterprise workshop, improve the processing efficiency and product quality, and has a certain reference value for the manufacturing enterprise production process parameter management.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90829192","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

Application Design of Quality Management of Assembly Workshop Process 装配车间过程质量管理的应用设计

Science Discovery Pub Date : 2021-04-26 DOI: 10.11648/J.SD.20210902.21

Wang Yan, Z. Jianmin, Zheng Chao

{"title":"Application Design of Quality Management of Assembly Workshop Process","authors":"Wang Yan, Z. Jianmin, Zheng Chao","doi":"10.11648/J.SD.20210902.21","DOIUrl":"https://doi.org/10.11648/J.SD.20210902.21","url":null,"abstract":"China's manufacturing industry is developing rapidly. Quality management has become an important link in industrial production and operation activities. The level of workshop quality management has a profound impact on the improvement of production efficiency. The use of information technology to design the quality management application system of the assembly workshop process and solve the problems exposed in the quality management process is of great significance to improve the assembly efficiency of the workshop. In the previous workshop assembly process, offline information transmission was inefficient and error-prone. In response to this risk, this article develops a process quality management system for the assembly workshop, which enables the assembly work and quality management work in the workshop to work together. so that the information can be quickly transmitted and responded to. Therefore, this system guarantees high-quality and high-efficiency production of products. At the same time, a quality management model framework was built. And functions such as production line management, schedule efficiency analysis, quality inspection traceability were completed. It has realized the organic integration of efficient and coordinated operations of operators, quality management, planning and materials in the workshop assembly process. Based on this, the design of the quality management information system for the assembly workshop was completed, which provided strong support for the digital integration of the system, big data processing and intelligent manufacturing.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84131437","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

The Research of MES Material Management Base on BOM 基于BOM的MES物料管理研究

Science Discovery Pub Date : 2021-04-26 DOI: 10.11648/J.SD.20210902.19

Fan Guoliang, Zhan Guangshen, Xu Qilin

{"title":"The Research of MES Material Management Base on BOM","authors":"Fan Guoliang, Zhan Guangshen, Xu Qilin","doi":"10.11648/J.SD.20210902.19","DOIUrl":"https://doi.org/10.11648/J.SD.20210902.19","url":null,"abstract":"MES is an information system for workshop between the planning system and operation control system. It is the basic technical means to realize the automation and agility of production management. The functions of MES include resource allocation, process management, quality control, material management, etc. MES can achieve the function of information tracking, information analysis. It can also predict what may happen in the production process. BOM can describe the material composition of a product and the relationship between its finished materials. MBOM contains the detailed information of various parts, such as the source, quantity and the difference of using time. In essence, it is the description of product materials. Product materials are the core resource of manufacture and management. MBOM provide important information of inventory preparation and material distribution. The traditional material management mode only focuses on the business of purchase, distribution and storage. The relationship between various materials is not considered. Based on the study of the traditional material management mode, this paper puts forward the MES material management mode based on BOM. The information management system is designed and developed according to this management mode. Through the verification by practical application, the material management mode based on BOM realizes the reasonable allocation of materials. Using BOM can improve the efficiency of MES material management.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80689424","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

Design and Implementation of MES for Discrete Manufacturing Workshop of an Aerospace Enterprise 某航空航天企业离散制造车间MES的设计与实现

Science Discovery Pub Date : 2021-04-26 DOI: 10.11648/J.SD.20210902.18

Zhan Guangshen, Yu Changyong, W. Yan

{"title":"Design and Implementation of MES for Discrete Manufacturing Workshop of an Aerospace Enterprise","authors":"Zhan Guangshen, Yu Changyong, W. Yan","doi":"10.11648/J.SD.20210902.18","DOIUrl":"https://doi.org/10.11648/J.SD.20210902.18","url":null,"abstract":"MES belongs to the production execution system of manufacturing enterprises. When applied to the production process, MES can effectively promote the construction of enterprise information and improve the market competitiveness of enterprises. This paper takes the discrete manufacturing workshop of an aerospace company as the research object, aiming at the characteristics of its multi-variety, small batch, and discrete production, combining the current production management status of the workshop and the functional requirements of information business, guided by advanced concepts such as lean production Thought, proposed the MES system architecture design plan, built an aerospace enterprise discrete manufacturing workshop MES. The system mainly includes process management, material management, equipment management, plan management, special process management, quality management, data collection and other functions. The system opens up the production process data link, realizes process visualization, material life cycle management, and fine production equipment management, production planning process control, special process monitoring and tracking, process quality data analysis, and automatic collection of generated equipment data. And the system have formed a digital analysis platform suitable for aerospace discrete manufacturing workshops, solving the actual production management problems of aerospace enterprises’ discrete manufacturing workshops and improving It improves the information management level and production efficiency of the workshop, and provides ideas for the leap-forward improvement and development of the production and manufacturing capacity of the enterprise.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80801302","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