scholarly journals Development and Application of Virtual Simulation Teaching Platform for the Transcritical CO2 Two-Stage Compression Refrigeration System Based on LabVIEW

2021 ◽  
Author(s):  
Yuyao Sun ◽  
Jinfeng Wang ◽  
Jing Xie ◽  
Chenlong Wu
Keyword(s):  
Pressure Control ◽  
Virtual Simulation ◽  
Refrigeration System ◽  
Two Stage ◽  
Simulation Experiments ◽  
Teaching Platform ◽  
System A ◽  
Practice Mode ◽  
Operational Errors

Based on the principle of transcritical CO2 two-stage compression refrigeration system, a virtual simulation teaching platform was developed. Two operation modes can be selected which are practice mode and test mode. According to questions and tips about experiments, students can do simulation experiments by open required valves, running the refrigeration system, adjusting pressure control valves and so on. When these operations are completed, students can save the file of the simulation experiment and exit the system. Then, test marks of students can be exported to Excel for teachers to view. In addition, some risks of operational errors can also be avoided, such as equipment damage. Moreover, if there is a computer, the simulation experiments can be done by this virtual simulation teaching platform, which is very convenient. The virtual simulation teaching platform is innovative and practical. The application of this virtual simulation teaching platform can improve the quality of the traditional teaching in the refrigeration field.

Under the Guidance of “Macroscopic Engineering”, Cultivate the Engineering Quality of College Students in Muti-Measures

2014 ◽  
Vol 635-637 ◽  
pp. 2071-2075
Author(s):  
Xian Wen Miao ◽  
Gen Fu Yuan ◽  
Yuan Qiang Gu
Keyword(s):  
Engineering Practice ◽  
University Reform ◽  
Teaching Mode ◽  
Teaching Resources ◽  
Teaching Platform ◽  
Practice Teaching ◽  
Practice Mode ◽  
Engineering Training ◽  
Training Practice

The advanced talents with applied technique should be composite, creative talents in the background of macroscopic engineering. Whereas some engineering training center have not transformed from the metalworking practice mode which can not adapt itself to the requirements of talents cultivation in 21 century, our university reform the contents of practice teaching and innovate the teaching mode of engineering training, integrate and optimize the internal teaching resources and strength the deep cooperation with enterprises under the guidance of the conception of “Macroscopic Engineering”. We structure the engineering training practice teaching platform with intercross of many subjects in order to cultivate the engineering quality of students in muti-measures. The students received the cultivation in the aspects of engineering conception, engineering practice ability and creative ability, which we received unprecedented teaching results.Keyword: Concept of “Macroscopic Engineering”; Intercross of many subjects; Practice Platform; Engineering Quality

Technology and Hospital Information System: A Case of Implementation of Electronic Clinical Records in Hospital Maternity Irene Neto in Lubango, Angola

2019 ◽  
Vol 10 (11) ◽  
pp. 1131-1135
Author(s):  
Tomas Hambili Paulo Sanjuluca ◽  
◽  
Ricardo Correia ◽  
Anabela Antunes de Almeida ◽  
Ana Gloria Diaz Martinez ◽  
...  
Keyword(s):  
Maternity Hospital ◽  
Management Support ◽  
Retrospective Case ◽  
System A ◽  
Clinical Records ◽  
Retrospective Case Study ◽  
The Impact ◽  
And Child Health

Introduction: In order to have a good assessment of the quality of maternal and child health care, it is essential that there is up-to-date and reliable information. Objective: To evaluate the impact of the implementation of a computerized database of clinical processes in the admission, archive and medical statistics section, of Maternity hospital Irene Neto/Lubango-Angola. Methodology: A descriptive study with a quantitative and qualitative approach to carry out a retrospective case study deliveries and newborns, records from 2014 to 2017. Final considerations: The implementation of this project may contribute to the improvement of clinical management support management of the hospital as well as facilitating access to information for research and scientific production.

UGR CALCULATION BASED ON THE LUMINANCE SPATIAL-ANGULAR DISTRIBUTION

2020 ◽  
Vol 2020 (4) ◽  
pp. 25-32
Author(s):  
Viktor Zheltov ◽  
Viktor Chembaev
Keyword(s):  
Monte Carlo ◽  
Angular Distribution ◽  
Monte Carlo Method ◽  
Visual Task ◽  
New Method ◽  
Lighting System ◽  
Preliminary Assessment ◽  
System A ◽  
The Monte Carlo Method

The article has considered the calculation of the unified glare rating (UGR) based on the luminance spatial-angular distribution (LSAD). The method of local estimations of the Monte Carlo method is proposed as a method for modeling LSAD. On the basis of LSAD, it becomes possible to evaluate the quality of lighting by many criteria, including the generally accepted UGR. UGR allows preliminary assessment of the level of comfort for performing a visual task in a lighting system. A new method of "pixel-by-pixel" calculation of UGR based on LSAD is proposed.

MULTISTAGE MICROSTRIP UHF LOAD

2018 ◽  
pp. 53-57 ◽  
Author(s):  
G. G. Savenkov ◽  
V. P. Razinkin ◽  
A. D. Mekhtiev
Keyword(s):  
Frequency Response ◽  
Frequency Band ◽  
High Power ◽  
Two Stage ◽  
High Power Microwave ◽  
Modelling Method ◽  
Optimal Values ◽  
Inductive Elements ◽  
Power Microwave

Applications of modern terminal loads and its relevant disadvantages are described in this paper. The decomposing method of wideband microwave high power microstrip loads design is proposed in this paper with purpose of matching quality improving. Multiple extension of multistage load bandwidth is provided by using of external matching circuit and internal matching inductive elements. The maximum reachable bandwidth of multistage load is estimated and optimal values of mathing circuit elements are founded on basis of equivalent lumped scheme. The topology of microstrip two-stage high power microwave load is developed and its frequency response, calculated via numeric electrodynamic modelling method is outlined in the paper. Modelling results show good matching quality of considered load at the frequency band below 3,5 GHz.

scholarly journals Construction of virtual simulation teaching platform for elevator control

2021 ◽  
Vol 1848 (1) ◽  
pp. 012120
Author(s):  
Wanfeng Chang ◽  
Qingyong Zhang ◽  
Huiwen Xia ◽  
Yang Yang
Keyword(s):  
Virtual Simulation ◽  
Teaching Platform

scholarly journals A Comparison of Two-Stage and Traditional Co-Composting of Green Waste and Food Waste Amended with Phosphate Rock and Sawdust

2021 ◽  
Vol 13 (3) ◽  
pp. 1109
Author(s):  
Edgar Ricardo Oviedo-Ocaña ◽  
Angélica María Hernández-Gómez ◽  
Marcos Ríos ◽  
Anauribeth Portela ◽  
Viviana Sánchez-Torres ◽  
...  
Keyword(s):  
Organic Matter ◽  
Product Quality ◽  
Food Waste ◽  
Phosphate Rock ◽  
Pilot Scale ◽  
Two Stage ◽  
Green Waste ◽  
Wet Weight ◽  
Two Phases

The composting of green waste (GW) proceeds slowly due to the presence of slowly degradable compounds in that substrate. The introduction of amendments and bulking materials can improve organic matter degradation and end-product quality. However, additional strategies such as two-stage composting, can deal with the slow degradation of green waste. This paper evaluates the effect of two-stage composting on the process and end-product quality of the co-composting of green waste and food waste amended with sawdust and phosphate rock. A pilot-scale study was developed using two treatments (in triplicate each), one being a two-stage composting and the other being a traditional composting. The two treatments used the same mixture (wet weight): 46% green waste, 19% unprocessed food waste, 18% processed food waste, 13% sawdust, and 4% phosphate rock. The traditional composting observed a higher degradation rate of organic matter during the mesophilic and thermophilic phases and observed thermophilic temperatures were maintained for longer periods during these two phases compared to two-stage composting (i.e., six days). Nonetheless, during the cooling and maturation phases, the two treatments had similar behaviors with regard to temperature, pH, and electrical conductivity, and the end-products resulting from both treatments did not statistically differ. Therefore, from this study, it is concluded that other additional complementary strategies must be evaluated to further improve GW composting.

Evaluation of Drying Performance, Energy Consumption, and Quality of Two-Stage Dried Maize Grain

2021 ◽  
Author(s):  
Md. Akhtaruzzaman ◽  
Md. Hasan Tarek Mondal ◽  
Mrityunjoy Biswas ◽  
Md. Abdul Momin Sheikh ◽  
Anwara Akter Khatun ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Two Stage ◽  
Maize Grain
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