-
Monitoring and Analysis of Drug Resistance of Yersinia in Fresh Meat
Liu Guihua,
Zhang Weiyu,
Huang Xin,
Gong Yunwei
Issue:
Volume 9, Issue 2, April 2021
Pages:
32-36
Received:
10 March 2021
Accepted:
19 March 2021
Published:
30 March 2021
Abstract: Objective To monitor the drug resistance status of yersinia isolates from fresh meat, grasp the drug resistance spectrum and trend of Yersinia isolates in Our province, and provide important reference data for guiding the rational application of antibiotics in human clinical practice and controlling the spread of drug resistant strains. Methods A total of 600 pieces of fresh pork, beef and chicken were collected from several farmers' markets and supermarkets in Changchun every month for 15 months from August 18th to October 19th. 80 strains of Yersinia strains were detected, and MIC concentrations of drug resistance were detected by microbroth dilution with 15 antibiotic sensitive plates. Results 80 strains of Yersinia strains were counted. The total drug resistance rate of Yersinia pestis was 98.8%, and cefazolin (CFZ) had the highest drug resistance rate of 92.5.% (74/80). Erythromycin (ERY) was followed by 58.8% (47/80). Ampicillin (AMP) 57.5% (46/80); Naproxil acid (NAL) and cefoxitin (CFX) were 28.8 (23/80) and were somewhat resistant to other antibiotics. But all strains were sensitive to imipenem (IMP) and gentamicin (GEN). There were 28 strains with multiple drug resistance, accounting for 35.4% (28/79). Conclusion There are multiple antibiotic resistance in Yersinia strains in this monitoring, and the multiple drug resistance is serious and the resistance spectrum is diverse. In order to ensure food safety and human health, great attention should be paid to and enhanced drug resistance monitoring of Yersinia.
Abstract: Objective To monitor the drug resistance status of yersinia isolates from fresh meat, grasp the drug resistance spectrum and trend of Yersinia isolates in Our province, and provide important reference data for guiding the rational application of antibiotics in human clinical practice and controlling the spread of drug resistant strains. Methods A t...
Show More
-
Safety Assessment of Rigid Frame Cantilever Construction Based on Matter-Element and Extension
Zhu Qinghua,
Tian Zhongchu
Issue:
Volume 9, Issue 2, April 2021
Pages:
37-42
Received:
8 March 2021
Published:
30 March 2021
Abstract: In order to effectively evaluate the safety status of the cantilever construction of a large-span rigid frame bridge, this paper takes a four-span rigid frame bridge as the engineering background, selects the failure probability of the cantilever construction, the natural environment, the cantilever construction operation, and the management level as the evaluation factors and divides the possibility level into Five levels, an extension model is established to evaluate the cantilever construction of the bridge. This paper first uses fuzzy comprehensive evaluation to quantify the natural environment and cantilever construction technology, then calculates the failure probability of the bridge cantilever construction based on Monte Carlo theory, and finally scores according to the management level of the management system. Invite relevant experts to obtain the weight set of each evaluation factor through the 1-9 scale method, and use the goodness evaluation method in the matter-element extension method for evaluation. The results show that the safety assessment result of the cantilever construction of the bridge is a medium risk, which provides a reliable basis for predicting and avoiding risks. Based on the matter-element extension method, the rigid frame cantilever construction safety assessment takes into account the uncertainty and ambiguity of failure, and more objectively reflects the safety status of the cantilever construction during the construction period. The calculation results of different safety evaluation models are compared with the results of this paper, which verifies the feasibility and effectiveness of the matter-element extension theory applied to the safety evaluation of cantilever construction.
Abstract: In order to effectively evaluate the safety status of the cantilever construction of a large-span rigid frame bridge, this paper takes a four-span rigid frame bridge as the engineering background, selects the failure probability of the cantilever construction, the natural environment, the cantilever construction operation, and the management level ...
Show More
-
Discussion on the Installation of Safety Action Failure Warning System in the Power Supply System of Beijing Winter Olympic Games
Issue:
Volume 9, Issue 2, April 2021
Pages:
43-46
Received:
10 March 2021
Published:
16 April 2021
Abstract: The 2022 Beijing Winter Olympic Games is the first Winter Olympic Games that China has applied to host. It not only symbolizes the strength of China's sports cause, but also shows the strength of China's national strength. In order to ensure a safe and reliable power supply for the Beijing Winter Olympics, this paper analyzes the possible shortcomings of anti-violation in"three protection", "throw protection", technical standards of the power supply system of Beijing 2022 Winter Olympic Games, listed the fire accident lessons of Ice and Snow Museum of Taitai mountain in Taiyuan, and puts forward the method of the Winter Olympic Games to make up the"short board of anti-violation". For example, adding action failure warning system to the powe rsupply system, working with technical experts, making up the short board of anti-violation to prevent and resolving the professional risks of illegal electrical. At the same time, the paper puts forward some technical ideas to prevent the violation of regulations, which will add a layer of insurance for the power guarantee and safe electricity consumption of the Winter Olympic Games.
Abstract: The 2022 Beijing Winter Olympic Games is the first Winter Olympic Games that China has applied to host. It not only symbolizes the strength of China's sports cause, but also shows the strength of China's national strength. In order to ensure a safe and reliable power supply for the Beijing Winter Olympics, this paper analyzes the possible shortcomi...
Show More
-
Performance Analysis of Non-uniform Sparse Segmentation Integral Method Based on Gauss Integral in EM Forward of Electrical Antenna Under Stratified Ocean
Zongyang Shi,
Yiyu Zhao,
Xiaodong Qu,
Lichao Ma
Issue:
Volume 9, Issue 2, April 2021
Pages:
47-57
Received:
18 February 2021
Published:
26 April 2021
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.
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...
Show More
-
Simulation and Experiment of Underwater Target Active Electromagnetic Detection Based on SLF/ELF artificial Source
Zongyang Shi,
Yiyu Zhao,
Lichao Ma,
Xueming Peng,
Yike Xu,
Shurong Guo,
Meng Wang,
Yuhong Wang
Issue:
Volume 9, Issue 2, April 2021
Pages:
58-67
Received:
3 March 2021
Published:
26 April 2021
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.
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 ...
Show More
-
Design and Implementation of MES for Discrete Manufacturing Workshop of an Aerospace Enterprise
Zhang Guangshen,
Yu Changyong,
Wang Yan
Issue:
Volume 9, Issue 2, April 2021
Pages:
68-73
Received:
17 March 2021
Published:
26 April 2021
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.
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...
Show More
-
The Research of MES Material Management Base on BOM
Fan Guoliang,
Zhang Guangshen,
Xu Qilin
Issue:
Volume 9, Issue 2, April 2021
Pages:
74-78
Received:
17 March 2021
Published:
26 April 2021
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.
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 informati...
Show More
-
Research on Production Process Parameter Management Based on MES System
Zheng Chao,
Wang Yan,
Zhang Guangshen
Issue:
Volume 9, Issue 2, April 2021
Pages:
79-84
Received:
17 March 2021
Published:
26 April 2021
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.
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 ...
Show More
-
Application Design of Quality Management of Assembly Workshop Process
Wang Yan,
Zhang Jianmin,
Zheng Chao
Issue:
Volume 9, Issue 2, April 2021
Pages:
85-90
Received:
17 March 2021
Published:
26 April 2021
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.
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 ...
Show More
