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Impeller Machining Technology Research based on CAXA 基于CAXA的叶轮加工技术研究
Scientific Journal of Technology Pub Date : 2023-04-20 DOI: 10.54691/sjt.v5i4.4760
Xinjian Xu
{"title":"Impeller Machining Technology Research based on CAXA","authors":"Xinjian Xu","doi":"10.54691/sjt.v5i4.4760","DOIUrl":"https://doi.org/10.54691/sjt.v5i4.4760","url":null,"abstract":"The impeller is a kind of contain complex surface more difficult machining parts, often through the UG, Pro/E and CAM software production parts processing program. In this paper, ME2020 domestic CAXA software as a platform, the impeller machining method.In order to improve the machining efficiency of the impeller, and gives the VERICUT software optimization program method.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"604 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123234200","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
Comprehensive Literature Review of Research on Online Food Safety 网络食品安全研究综合文献综述
Scientific Journal of Technology Pub Date : 2023-04-20 DOI: 10.54691/sjt.v5i4.4735
Tingting Kuai
{"title":"Comprehensive Literature Review of Research on Online Food Safety","authors":"Tingting Kuai","doi":"10.54691/sjt.v5i4.4735","DOIUrl":"https://doi.org/10.54691/sjt.v5i4.4735","url":null,"abstract":"Food is the most basic requirement for human survival and development, and despite advancements in its large-scale production, the demand for food remains unmet. In many countries, the food industry has become one of the pillar industries. Safety is the most crucial aspect of food and also the primary criterion for the selection of food by consumers. In recent years, with the frequent occurrence of incidents related to food safety, particularly after the coronavirus disease-2019 pandemic, studies on food safety have been increasing rapidly. For an in-depth analysis of the progress of food safety research, this study used CiteSpace for literature measurement to analyze relevant research studies in the Web of Science (WOS) database from 2001 to 2021 and to map keywords, authors, and institutions. Results indicated that research from the United States is comprehensive and research institutions are closely related. Since 2015, the number of periodicals included in the WOS has increased rapidly, and its influence has gradually increased. At present, the research hot spots in the field of food safety are the micro-subject of food safety, food safety products, food safety laws and regulations, and other related fields.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"229 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123254722","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
Invoice Detection and Classification based on Improved YOLOv5s 基于改进YOLOv5s的发票检测与分类
Scientific Journal of Technology Pub Date : 2023-04-20 DOI: 10.54691/sjt.v5i4.4737
Weihua Niu, Qiaoyue Liu
{"title":"Invoice Detection and Classification based on Improved YOLOv5s","authors":"Weihua Niu, Qiaoyue Liu","doi":"10.54691/sjt.v5i4.4737","DOIUrl":"https://doi.org/10.54691/sjt.v5i4.4737","url":null,"abstract":"For the complex problems of invoice occlusion, invoice deformation, dark environment, excessive noise and so on in invoice detection, this paper proposes an improved YOLOv5s invoice detection and classification method. In order to improve the generalization ability of the model, the attention mechanism is introduced to improve the feature extraction ability of the network. By adding cavity convolution to the YOLOv5S backbone network and the neck network, and adding context transformation network to the backbone network, the robustness of the model is improved. For model output, flexible non-maximum suppression is used to replace non-maximum suppression to improve the detection effect. Comparative experiments show that the accuracy, recall and average accuracy of the proposed method are greatly improved.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127751434","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
Optimization Design of Food Slicer 食品切片机的优化设计
Scientific Journal of Technology Pub Date : 2023-04-20 DOI: 10.54691/sjt.v5i4.4759
Xinjian Xu
{"title":"Optimization Design of Food Slicer","authors":"Xinjian Xu","doi":"10.54691/sjt.v5i4.4759","DOIUrl":"https://doi.org/10.54691/sjt.v5i4.4759","url":null,"abstract":"A new type of food slicing machine was developed to solve the problems of high cost and high energy consumption of existing food slicing machines. The slicer can achieve rapid cutting of various foods, with the advantages of small vibration, low energy consumption, simple operation, safety and efficiency, and uniform cutting.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125430810","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
Toxic Effects of Several Common Heavy Metals in Soils on Terrestrial Invertebrates 土壤中几种常见重金属对陆生无脊椎动物的毒性作用
Scientific Journal of Technology Pub Date : 2023-04-20 DOI: 10.54691/sjt.v5i4.4733
Yilun Dai, Yi Xiao
{"title":"Toxic Effects of Several Common Heavy Metals in Soils on Terrestrial Invertebrates","authors":"Yilun Dai, Yi Xiao","doi":"10.54691/sjt.v5i4.4733","DOIUrl":"https://doi.org/10.54691/sjt.v5i4.4733","url":null,"abstract":"In this paper, the ecotoxicology research method combines field investigation and indoor simulation experiment. Sampling and analysis of heavy metal pollution of solid soil samples from lead-acid battery factory, identified Pb, Cd and Cr as the pollution research objects, discussed the biological reaction mechanism of Eiseniafetida under the stress of heavy metals Pb, Cd and Cr, and obtained the results. The results of the lethal and sublethal effects of Pb, Cd and Cr on Pb, Cd and Cr and the effect of biomarkers. The main research results are as follows: In the acute toxicity test of Aisheng worm, the theoretical half-lethal concentrations (LC50) of single Pb, Cd, and Cr exposure for 14 days were 2620.93, 362.83, and 229.44 mg/kg, respectively, and their toxicity was Cr>Cd>Pb .","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125593654","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
A Phosphorous-based Polyol for Flame Retarded Rigid Polyurethane Foam 阻燃硬质聚氨酯泡沫用磷基多元醇
Scientific Journal of Technology Pub Date : 2023-04-20 DOI: 10.54691/sjt.v5i4.4758
Xiaoai Zhang, Yichao Xie, Weiping Guo, Li Yan
{"title":"A Phosphorous-based Polyol for Flame Retarded Rigid Polyurethane Foam","authors":"Xiaoai Zhang, Yichao Xie, Weiping Guo, Li Yan","doi":"10.54691/sjt.v5i4.4758","DOIUrl":"https://doi.org/10.54691/sjt.v5i4.4758","url":null,"abstract":"A phosphorus-containing polyol (P-polyol) was synthesized with diethyl ethylphosphate (DEEP) and trihydroxymethyl phosphane oxide (THPO) via transesterification reaction, which was introduced into rigid polyurethane foam (RPUF) by in-situ chemical reaction. The optimum synthesis conditions of P-polyol were investigated as follows: butyldihydroxychlorostannane as catalytic agent, the molar ratio of DEEP to THPO was 1:1 at 120-170℃, the yield was over 85%, the apparent viscosity of P-polyol was 1400 MPa.S with the hydroxyl value about 480 mg KOH/g  and the acid value about 100 mg KOH/g. With the increase of adding P-polyol, the flame retardant properties of the RPUF increased continuously. When the P-polyol amount in white material was 40%, the LOI reached24.7% and vertical combustion test rated UL 94 V-0. TGA results show that the P-polyol promotes the degradation and the formation of char residue of RPUF significantly. The polyurethane foam had the characteristics of condensation phase. Simultaneously, the compressive strength of RPUF was increased by 50 % and 21% in horizontal and vertical direction, respectively, compared with neat RPUF.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123210248","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
Clinical Efficacy of VSD in the Treatment of Orthopedic Trauma and Infected Wounds VSD治疗骨科创伤及感染创面的临床疗效观察
Scientific Journal of Technology Pub Date : 2023-04-20 DOI: 10.54691/sjt.v5i4.4734
Guorui Ding
{"title":"Clinical Efficacy of VSD in the Treatment of Orthopedic Trauma and Infected Wounds","authors":"Guorui Ding","doi":"10.54691/sjt.v5i4.4734","DOIUrl":"https://doi.org/10.54691/sjt.v5i4.4734","url":null,"abstract":"Objective: To study the clinical effects of negative pressure closed drainage (VSD) in the treatment of orthopedic trauma as well as infected trauma. Methods: Fifty patients with orthopedic trauma and infected wounds admitted to hospital from March 2017 to May 2019 were selected and randomly grouped, and the various clinical effects of the two groups were compared. Results: All clinical effects of patients in the observation group were better than those in the control group (P < 0.05). Conclusion: The treatment of orthopedic trauma and infected trauma patients by VSD technology can improve the clinical effect and is worth promoting.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124351730","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 Simulation of Flow Characteristics in Horizontal Pipe 水平管内流动特性的数值模拟
Scientific Journal of Technology Pub Date : 2023-03-20 DOI: 10.54691/sjt.v5i3.4531
Ling Feng
{"title":"Numerical Simulation of Flow Characteristics in Horizontal Pipe","authors":"Ling Feng","doi":"10.54691/sjt.v5i3.4531","DOIUrl":"https://doi.org/10.54691/sjt.v5i3.4531","url":null,"abstract":"The purpose of this study is to study the state of gas-solid two-phase transportation process in different types of pipelines, so as to find out the cause of pipeline blockage. The horizontal pipe is the most common arrangement in the pneumatic conveying pipeline, and the gravity direction of particles in the horizontal pipe pneumatic conveying is perpendicular to the flow direction, which makes the flow of oil well cement particles in the horizontal pipe more complex, so it is very necessary to study the pneumatic conveying process of the horizontal pipe.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116165504","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 Progress of Remedial Materials for Heavy Metal Contaminated Soil 重金属污染土壤修复材料的研究进展
Scientific Journal of Technology Pub Date : 2023-03-20 DOI: 10.54691/sjt.v5i3.4496
Weiwei Chen, Zhaoxin Zhang
{"title":"Research Progress of Remedial Materials for Heavy Metal Contaminated Soil","authors":"Weiwei Chen, Zhaoxin Zhang","doi":"10.54691/sjt.v5i3.4496","DOIUrl":"https://doi.org/10.54691/sjt.v5i3.4496","url":null,"abstract":"The farmland soil is combined pollution by multi-heavy metals in China, which seriously threatens the food security and the human health. This paper makes a review of the characteristics of the heavy metal contaminated farmland soil and the types and characteristics of common remedial materials. In addition, this paper analyzed and forecasted the problems that need to be solved in the future for remedial materials for heavy metal contaminated soil. Common remediation materials include biochar, clay minerals, organic matter, phosphates, metal oxides and composite remediation materials, etc. The remediation materials can effectively reduce the mobilization and bioavailability of heavy metals. This paper summarized the types and characteristics of remedial materials for heavy metal contaminated soil, so as to provide theoretical basis for remediation materials and prevention and control strategy for the heavy metal pollution.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125706778","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
Discussion on High-standard Farmland Management and Protection Problems and Countermeasures 高标准农田管理与保护存在的问题及对策探讨
Scientific Journal of Technology Pub Date : 2023-03-20 DOI: 10.54691/sjt.v5i3.4497
Jing Zhang, P. Zhang
{"title":"Discussion on High-standard Farmland Management and Protection Problems and Countermeasures","authors":"Jing Zhang, P. Zhang","doi":"10.54691/sjt.v5i3.4497","DOIUrl":"https://doi.org/10.54691/sjt.v5i3.4497","url":null,"abstract":"Affected by factors such as repeated delays in the epidemic, climate change and frequent natural disasters, food security risks are prominent, and it is imperative to ensure food security. The construction of high-standard farmland is a realistic need to improve comprehensive agricultural production capacity and ensure food security, but in the construction process, there is a phenomenon of attaching importance to construction and neglecting management and protection, resulting in the failure of the completed high-standard farmland to play a sustained and efficient role, resulting in damage to facilities and waste of resources. From the perspective of inadequate management and protection of high-standard farmland, this paper analyzes the causes, analyzes the problems, and puts forward countermeasures, so as to provide positive suggestions for the long-term benefits of high-standard farmland and ensure food security.","PeriodicalId":336556,"journal":{"name":"Scientific Journal of Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117060238","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
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