packing process
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Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Fei Xu ◽  
Shengtian Zhou ◽  
Chong Zhang ◽  
Yi Yu ◽  
Zhao Dong

Shunted screen gravel packing is a kind of technology which is difficult to complete gravel packing with the conventional method in low fracture pressure formation and long wellbore length condition. According to the characteristics of LS 17-2 deepwater gas field, the shunted screen packing tool was designed and the gravel packing process and packing mechanism were analyzed. The variation law of the flow friction, flow rate distribution in multichannel, and other parameters of the shunted screen gravel packing were analyzed and calculated. The friction calculation model of different stages of gravel packing was established. A gravel packing simulation software was developed to simulate the friction in different stages of shunted screen gravel packing. The parameters such as sand-dune ratio, pumping sand amount, packing length, and packing time in the process of packing were also calculated. In deepwater horizontal well gravel packing, the results show that the friction ratio of the string is the largest in the stage of injection and α-wave packing. While the friction increases rapidly in the stage of β-wave packing because the carrier fluid needs to flow through the long and narrow washpipe/screen annulus. Particularly when the β-wave packing is near the beginning of the open hole, the packing pressure reaches the maximum. The calculated results are in good agreement with the measured results of the downhole pressure gauge. The model and software can provide technical support for the prediction and optimization of gravel packing parameters in the future.


Algorithms ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 350
Author(s):  
Nicola Ognibene Pietri ◽  
Xiaochen Chou ◽  
Dominic Loske ◽  
Matthias Klumpp ◽  
Roberto Montemanni

Online shopping is growing fast due to the increasingly widespread use of digital services. During the COVID-19 pandemic, the desire for contactless shopping has further changed consumer behavior and accelerated the acceptance of online grocery purchases. Consequently, traditional brick-and-mortar retailers are developing omnichannel solutions such as click-and-collect services to fulfill the increasing demand. In this work, we consider the Buy-Online-Pick-up-in-Store concept, in which online orders are collected by employees of the conventional stores. As labor is a major cost driver, we apply and discuss different optimizing strategies in the picking and packing process based on real-world data from a German retailer. With comparison of different methods, we estimate the improvements in efficiency in terms of time spent during the picking process. Additionally, the time spent on the packing process can be further decreased by applying a mathematical model that guides the employees on how to organize the articles in different shopping bags during the picking process. In general, we put forward effective strategies for the Buy-Online-Pick-up-in-Store paradigm that can be easily implemented by stores with different topologies.


Author(s):  
Popy Yuliarty ◽  
Faisol Ardhi H ◽  
Rini Anggraini ◽  
Atiek Ike Wijayant

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Hafidh Munawir ◽  
Isnainiyah Wardatul Jannah ◽  
Eko Setiawan

 Tiga Hati Mutiara is a food industry located in Sukoharjao, Central Java. One of the activities in the production process is packaging. The posture of the workers in the packing process is to stand and bend over. The position of the worker is very dangerous if it is done repeatedly and continuously. This study aims to identify the posture and ergonomic risks of workers and provide suggestions for improving worker posture. The methods used in this research are the Rapid Entire Body Assessment (REBA) method and the Ovako Work Posture Analysis System (OWAS) method. The results of the research on the packaging process using the REBA method obtained a score of 8, which means that the level of risk is high and needs immediate improvement, while the OWAS method has a score of 4, which means that this attitude is very dangerous for the musculoskeletal system and needs immediate improvement. Improvements made are to improve the position of workers and dimensions of the table. After the improvement, the REBA score was 2 and OWAS was 1, which means that the proposed posture condition is good.


2021 ◽  
Vol 385 ◽  
pp. 444-454
Author(s):  
C.X. Li ◽  
J.Q. Gan ◽  
D. Pinson ◽  
A.B. Yu ◽  
Z.Y. Zhou

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Ting Yang ◽  
Fei Luo ◽  
Joel Fuentes ◽  
Weichao Ding ◽  
Chunhua Gu

The slack-based algorithms are popular bin-focus heuristics for the bin packing problem (BPP). The selection of slacks in existing methods only consider predetermined policies, ignoring the dynamic exploration of the global data structure, which leads to nonfully utilization of the information in the data space. In this paper, we propose a novel slack-based flexible bin packing framework called reinforced bin packing framework (RBF) for the one-dimensional BPP. RBF considers the RL-system, the instance-eigenvalue mapping process, and the reinforced-MBS strategy simultaneously. In our work, the slack is generated with a reinforcement learning strategy, in which the performance-driven rewards are used to capture the intuition of learning the current state of the container space, the action is the choice of the packing container, and the state is the remaining capacity after packing. During the construction of the slack, an instance-eigenvalue mapping process is designed and utilized to generate the representative and classified validate set. Furthermore, the provision of the slack coefficient is integrated into MBS-based packing process. Experimental results show that, in comparison with fit algorithms, MBS and MBS’, RBF achieves state-of-the-art performance on BINDATA and SCH_WAE datasets. In particular, it outperforms its baseline MBS and MBS’, averaging the number increase of optimal solutions of 189.05% and 27.41%, respectively.


2021 ◽  
Vol 31 (1) ◽  
pp. 51
Author(s):  
Muhamad Erga Elfanda

Introduction: The problem faced by the company is the increase in the number of damaged products during the production process, which affects the quality of the product resulting decreased sales levels. The production process in food, beverage, and other processing industry is the most important activity to produce products that later to be marketed. Methods: The research method used in the study is Six Sigma method. Six Sigma is a system which has purpose to make a business become successful in a comprehensive and flexible manner. The product taken and examined is the sweet fermented Carica fruit. This fruit will be produced by CV. Gemilang Kencana, wheresoever the fruit is ready for the packing process, both cups and bottles.Results: The results of the calculation of Six Sigma value from CV. Gemilang Kencana has a sigma level 3.8 with the possibility of damage/ defects to the product up to 11,760 pcs in a million chance of production (DPMO). To reduce the number of damaged/ defective products that occur in the production process by sorting the highest percentage of causes damage, namely packaging leakage by 37%, untidy products by 50%, and less full products by 13%.Conclusion and suggestion: After knowing the results in this study, if the cause of the damage is not handled properly, more products will fail during the production process, which will cause an increase in production costs and have an impact on company losses.


Author(s):  
Sen Qin ◽  
Huan-huan Zhang ◽  
Hao-wei Jiang ◽  
Wen-hua Xu ◽  
Jin-ping Qu

Abstract To obtain high-quality plastic products, an industrial volume-pulsatile injection molding (VPIM) machine is developed to achieve high screw displacement amplitude. However, it is difficult for engineers to optimize vibration parameters and improve equipment due to lack of a comprehensive understanding of the coupling correlation between amplitude and frequency, which seriously hinders the development of VPIM technology and machine. To address the challenge, this paper investigates the amplitude-frequency characteristics during the volume-pulsatile packing process. According to the working principle of machine, the dynamics model of injection screw is established and equivalent to a mass-spring-damper system. Based on the dynamics equivalent model, we deduce the forced vibration response of screw displacement, and the vibration responses of screw displacement and oil pressure under hydraulic system. Meanwhile, an overall system structure diagram including servo control is proposed and numerically solved. Experimental and theoretical results reveal the effects of material properties, machine components, and control system on the amplitude-frequency characteristics during the volume-pulsatile packing process. The inertial delay of hydraulic system is primarily responsible for the reductions in oil pressure amplitude and screw displacement amplitude, which subverts the previous perception. The response speed of servo control system to pressure should be improved to enhance oil pressure amplitude and screw displacement amplitude. This paper enriches the basic theories of polymer vibration processing and points out the direction of equipment improvement.


2021 ◽  
Vol 3 (1) ◽  
pp. 32-44
Author(s):  
Muhammad Zakki

This study aims to see how the total quality management (TQM) method plays a role in processing 99 coffee products in the Mandiri Mukmin Cooperative. In this study using total qualit management theory and qualitative research. The determination of informants in this study was determined in advance. Data collection was carried out using in-depth interview techniques which were conducted in a structured manner. The data analysis technique starts with doing data reduction, then presenting the data and then drawing conclusions. The data validity technique used the source triangulation technique by comparing the data obtained from each informant. Based on the data analysis carried out, the following conclusions are produced: 1) The implementation of total quality management (TQM) in processing 99 coffee products at the Mukmin Mandiri cooperative is in the packing process which still uses human labor. 2) In controlling the quality of coffee raw materials, the quality of processing is measured from the production process to the application of TQM for coffee products which includes product design, taste, and market service. 3) There are still various kinds of obstacles and problems faced in the TQM process of processing coffee products, namely in the production process the machines used are still not fully manufactured. A space or place to produce at the SME or Home Industry level.  


2021 ◽  
Vol 35 (3) ◽  
pp. 2145-2169
Author(s):  
Patrick Bennett ◽  
Ryan Cushman ◽  
Andrzej Dudek
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