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Designing Vendor Selection System Using Intuitionistic Fuzzy TOPSIS and Entropy Weighting Method in Oil and Gas Industry 基于直觉模糊TOPSIS和熵权法的油气行业供应商选择系统设计
Silmi Kaaffah, A. Ridwan, Nia Novitasari
Selecting appropriate vendor or supplier becomes one of the most important activity of purchasing function taken by decision makers that affect their supply chain operations. Various criteria that needs to be taken into consideration in choosing one feasible vendor amongst many options make this more complicated. In this study, the theory of intuitionistic fuzzy set combined with TOPSIS is used to overcome problems related to multiple criteria decisions making (MCDM). This method helps to quantify and overcome the fuzziness caused by expert judgement in assessing both criteria and alternatives. Shannon's entropy concept is also employed for weighting the criteria weight to prevent the inconsistency occur due to a large number of criteria taken into consideration. The result of this study is demonstration of intuitionistic fuzzy TOPSIS method that is combined with entropy weighting for selecting vendor in an upstream oil and gas industry to ease the process of decision making done by decision makers objectively, accurately, and speedy.
选择合适的厂商或供应商成为影响其供应链运作的决策者所采取的最重要的采购职能活动之一。在众多选择中选择一个可行的供应商时,需要考虑的各种标准使这变得更加复杂。本研究将直觉模糊集理论与TOPSIS相结合,用于解决多准则决策(MCDM)问题。该方法有助于量化和克服专家判断在评估标准和备选方案时造成的模糊性。在对标准权重进行加权时,还采用了香农熵的概念,以防止由于考虑的标准过多而产生的不一致。研究结果表明,将直觉模糊TOPSIS法与熵权法相结合用于油气上游行业供应商选择,可使决策者客观、准确、快速地进行决策。
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引用次数: 2
Material Handling System Improvement in Injection Section of Automotive Manufacturing Company 汽车制造公司注塑部物料搬运系统改进
Elbert Charistheo, T. D. Sofianti, A. Pratama
Material handling is an important aspect in the industry. Material handling supports all the supply for production which is why it plays a crucial role in the production line. Manual material handling uses workers to keep the supply of parts from storage to the assembly line. This is based on a Japanese automotive manufacturer company material handling problem. The material handling system is complex and not efficient. There are too many unnecessary movements for instance it took too many steps to supply the parts. This movement is seen as not efficient and categorized as waste in Lean Manufacturing. The data is gathered by observation the whole process in the injection section. DMAIC method is used as the main method to analyze the problem and to develop the solution. The Six Phases of The Generic Product Development Process is used to further develop the design of the supporting tool. The solution will reduce waste of movement in material handling and thus improve the productivity in the section by 19.6%.
物料搬运是该行业的一个重要方面。物料搬运支持所有的生产供应,这就是为什么它在生产线上起着至关重要的作用。手工物料搬运使用工人来保持零件从仓库到装配线的供应。这是基于日本某汽车制造公司的物料搬运问题。物料搬运系统复杂,效率不高。有太多不必要的动作,例如,它需要太多的步骤来提供零件。在精益生产中,这种运动被认为是低效的,被归类为浪费。数据是通过在注射段观察整个过程来收集的。采用DMAIC方法作为分析问题和制定解决方案的主要方法。通用产品开发过程的六个阶段用于进一步开发配套工具的设计。该解决方案将减少物料搬运过程中的移动浪费,从而将该部分的生产率提高19.6%。
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引用次数: 0
Synthesis of Zinc Oxide (ZnO) from Zinc Based-Fertilizer as Potential and Low-Cost Anode Material for Lithium Ion Batteries 以锌基肥料合成氧化锌作为锂离子电池负极材料的研究
C. Yudha, M. Rahmawati, A. Jumari, A. P. Hutama, A. Purwanto
Zinc based anode material is considered promising for lithium ion batteries due to its availability, low cost and nontoxic properties. In this research, low cost zinc oxide (ZnO) was synthesized via fast precipitation of zinc based fertilizer followed by sintering process. Sodium hydroxide, oxalic acid and ammonium bicarbonate were used as precipitant to obtain hydroxide, oxalate and carbonate precipitate, respectively. All of the precipitates have good crystalline properties based on the XRD analysis. High crystalline wurzite structure of ZnO powders were successfully obtained by high temperature sintering of Zn precursor precipitate while ZnO/Graphite composites were successfully fabricated by solid-state method. Electrochemical properties of the ZnO/graphite composites were measured by charge-discharge analysis of cells with ZnO/graphite as the anode material and LiFePO4 as the cathode material. ZnO derived from oxalate precipitation has the highest specific discharge capacity of 88 mAh/g. In conclusion, ZnO from zinc based fertilizer is a promising low cost and high performance anode materials for lithium ion batteries
锌基负极材料由于其可获得性、低成本和无毒等特点,被认为是锂离子电池的极具发展前景的材料。本研究采用锌基肥料快速沉淀后烧结工艺合成了低成本氧化锌(ZnO)。以氢氧化钠、草酸和碳酸氢铵为沉淀剂,分别得到氢氧化钠、草酸和碳酸盐沉淀。XRD分析表明,各析出物均具有良好的结晶性能。通过对Zn前驱体析出物进行高温烧结,成功制备出高结晶的ZnO纤锌矿结构粉体,并采用固态法制备了ZnO/石墨复合材料。以ZnO/石墨为正极材料,LiFePO4为正极材料,通过电池的充放电分析测试了ZnO/石墨复合材料的电化学性能。由草酸盐沉淀得到的ZnO具有最高的88 mAh/g比放电容量。综上所述,锌基肥料制备的ZnO是一种很有前途的低成本高性能锂离子电池负极材料
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引用次数: 4
Safety Riding Behavior Tendency among College Students Related to Driving Attitude, Riding Knowledge, and Emotional Intelligence Level 大学生安全骑行行为倾向与驾驶态度、骑行知识、情绪智力水平的关系
R. Zuraida, Andrew J. Russell
The increasing of accidents involving motorcycles in the last 5 years in Indonesia has pushed the government to continue campaigning safety riding to the young generation. The Indonesian Statistics Bureau data showed that accidents involving motorcycles were dominated by young age. In line with government regulations, this paper discusses safety riding behavior among college students. A questionnaire distributed to college students and obtained 228 valid respondents with average age were 21 years old (71% male, 29% female). The questionnaire consists general information, driving attitude tendency (RA), safety driving (SR) behavior, riding knowledge (RK), and emotional intelligence (EI). This study showed that SR tendency of college students is moderate. A driving license(s) owned (DL) influence the riding knowledge (RA) with p-value=0.004. However, RA, SR, and EI are not different between age, gender and study years. Using a binary logistic regression, SR level predicted well by RA (p-value=0.000) with 93.3% accuracy. Based on this study, the participants with good RA, 1.185 times more likely will have good SR level.
在过去的5年里,印尼摩托车事故的增加促使政府继续向年轻一代宣传安全骑行。印尼统计局的数据显示,涉及摩托车的事故以年轻人为主。本文结合政府规定,对大学生的安全骑行行为进行了探讨。问卷以在校大学生为对象,共获得有效问卷228人,平均年龄21岁,其中男性71%,女性29%。问卷由一般信息、驾驶态度倾向(RA)、安全驾驶行为(SR)、骑行知识(RK)和情绪智力(EI)组成。本研究表明,大学生的社会责任倾向是适度的。持有驾照(DL)对骑行知识(RA)的影响p值=0.004。然而,RA、SR和EI在年龄、性别和学习年限之间没有差异。采用二元逻辑回归,RA对SR水平的预测较好(p值=0.000),准确率为93.3%。根据本研究,RA良好的参与者,有1.185倍的可能性会有良好的SR水平。
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引用次数: 0
Fabrication of High Performance 18650-Type NCA/Graphite Cylindrical Cells 高性能18650型NCA/石墨圆柱形电池的制备
Hafid Khusyaeri, C. Yudha, M. Rahmawati, Dewi Pratiwi, E. Dyartanti, A. Purwanto
High energy and power density with long-lasting cycle performance are the main key feature of state-of-the-art Li-ion batteries, making them as one of the top choices for electric vehicle energy storage and power source. Lithium nickel cobalt aluminum oxide (NCA) specifically LiNi0.8Co0.15Al0.05O2 is cathode material with high gravimetric and volumetric energy density which is promising to be used as power and energy storage. In this paper, NCA/Graphite cells with high capacity and superior performance are fabricated via tuning of conducting agent composition. Acetylene black carbon black and graphitic KS-6 were selected as the conductive additives. Based on the result, high amount of KS-6 shows inferior performance at elevated current rate. On the contrary, high amount of AB shows better cycling stability but low specific capacity. In the end, high capacity and high-performance cells were obtained by a formula where mixture of KS-6 and AB ratio is 2:1.5 w/w.
高能量和功率密度、长循环性能是最先进的锂离子电池的主要特点,是电动汽车储能和电源的首选之一。锂镍钴铝氧化物(NCA),即LiNi0.8Co0.15Al0.05O2,是一种具有高重量和体积能量密度的正极材料,在电力和储能领域具有广阔的应用前景。本文通过调整导电剂的组成,制备了具有高容量和优异性能的NCA/石墨电池。选择乙炔黑、炭黑和石墨KS-6作为导电添加剂。结果表明,在高电流速率下,高剂量的KS-6表现出较差的性能。相反,大量的AB循环稳定性较好,但比容量较低。最后,按KS-6与AB的混合比为2:1.5 w/w的配方,获得了高容量、高性能的电池。
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引用次数: 0
The Use of Response Surface Method To Optimize The Ultrasound-assisted Extraction of Moringa Leaves 响应面法优化辣木叶超声辅助提取工艺
O. B. Pongtuluran, A. Suzianti
The Ultrasound-assisted extraction is one of the breakthrough in extraction techniques which offered the modest and more effective outcome based on several research influenced by some variables such as temperature, power and frequency, intensity, extraction time, preparation process, type and quantity of solvent. The objective of this study was to assess the effect of the three parameters including extraction time, solvent-to-solid ratio, and ethanol concentration each of which consists of three levels on the percentage of yield, total phenolic content and total flavonoid by using the Response Surface Method (RSM). This research used an ultrasound equipment which was set at frequency 20 kHz, amplitude 32% and the 0,5 of intensity. The experimental design of this research employed 40 runs of Response Surface Method constructed by Central Composite Design (CCD). The output showed that that the percentage of yield about 0.37-9.86%, the total phenolic compound ranged from 27.361-59.907 mg GAE/ml and the total flavonoid result varied from 5.568-67.384 mg/ml. In addition, the more ethanol concentration used the more phenolic and flavonoid content generated, however the yield production decreases. On the other hand the higher the solvent-to-solid ratio creates the high yield yet this variables showing no impact towards two other responses. The result of this study also revealed that extraction time has no effect on all the responses.
超声辅助提取技术是一项突破性的提取技术,通过对温度、功率和频率、强度、提取时间、制备工艺、溶剂种类和数量等因素的研究,获得了适度而有效的提取效果。采用响应面法(RSM)研究了提取时间、液料比和乙醇浓度对黄酮提取率、总酚含量和总黄酮含量的影响。本研究使用的超声设备,频率为20khz,振幅为32%,强度为0,5。本研究的实验设计采用中心复合设计(CCD)构建的40组响应面法。产率为0.37 ~ 9.86%,总酚类化合物含量为27.361 ~ 59.907 mg GAE/ml,总黄酮含量为5.568 ~ 67.384 mg/ml。乙醇浓度越高,酚类和类黄酮含量越高,但产率越低。另一方面,溶剂固比越高,产率越高,但这一变量对其他两种反应没有影响。本研究的结果还表明,提取时间对所有反应都没有影响。
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引用次数: 0
Strategic Energy Management Model in A Cement Plant in Indonesia 印尼某水泥厂战略能源管理模式
Agustinus Hariadidp, C. P. Mahandari
A cement plant was required to provide consistency of its energy performance through energy system implementation and a third-party certification. However, the plant has not an energy system in place to answer the quick demand apart from routine energy measurement. Energy design and implementation of management system (EDIM) based on ISO 50001: 2018 and the Pearce II and Robinson's strategic management model is then made and implemented to answer the problem. The ISO model contributes much on operational risks whilst the second emphasizes on strategic ones. The study applies qualitative method through interactions with 2 energy experts in strategic and management system and 3 plant staff dealing with energy and management system. Interview, notetaking and written comments are done to get themes of the issues. The investigation results in that the EDIM model has fully met requirements of the ISO 50001 as well as the strategic management model. It has provided adequate implementable framework and easily applied to attain energy performance indicators. Problems, though, are emerged during implementation due to separated strategic actions with operational practices including use of new energy-management terms asking for longer time to be comprehended. In conclusion, consistent energy performance in current business situation can be assured through the model consisting of strategic and operational components.
要求水泥厂通过能源系统实施和第三方认证提供其能源绩效的一致性。然而,除了常规的能源测量外,该工厂还没有一个能源系统来满足快速的需求。然后根据ISO 50001: 2018和Pearce II和Robinson的战略管理模型制定并实施能源设计和实施管理系统(EDIM)来回答这个问题。ISO模型对操作风险贡献很大,而第二个模型则强调战略风险。本研究采用定性方法,通过与2名能源战略与管理系统专家和3名工厂能源与管理系统工作人员的互动。通过采访、记笔记和书面评论来了解问题的主题。调查结果表明,EDIM模式完全符合ISO 50001和战略管理模式的要求。它为实现能源绩效指标提供了充分的可执行框架和易于应用。然而,由于战略行动与业务实践分开,包括使用需要较长时间才能理解的新能源管理术语,在执行过程中出现了问题。综上所述,通过由战略和运营组件组成的模型,可以确保当前业务状况下一致的能源绩效。
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引用次数: 0
Knowledge Creation Cycle in Design of Training Program for Car Manufacturing Company 汽车制造企业培训方案设计中的知识创造周期
Reynaldi Wijaya, T. D. Sofianti, S. Awibowo
This paper extends the literature of the knowledge creation cycle. It describes the activities of the knowledge creation processes on training program for car manufacturing companies. The knowledge creation process is crucial to ensure that information is processed to become a comprehensive set of knowledge available for its targets. However, this process requires thorough planning to accommodate practice, action, and interaction while preserving individual creativity and innovation. The implementation of this system at a car manufacturing company allows more efficient knowledge development on the human resource of its assembly line, reducing the length of the training program while maintaining product quality. For further development, it is recommended to utilize the knowledge creation process continues to train the human resources of the assembly line by focusing future research to find a suitable learning cycle methodology for the training program.
本文对知识创造周期的文献进行了拓展。描述了汽车制造企业培训项目知识创造过程的活动。知识创造过程对于确保将信息处理为可用于其目标的一套全面的知识至关重要。然而,这个过程需要周密的计划,以适应实践、行动和互动,同时保持个人的创造力和创新。该系统在一家汽车制造公司的实施使其装配线人力资源的知识开发更加有效,在保持产品质量的同时减少了培训计划的长度。为了进一步发展,建议利用知识创造过程继续培训装配线的人力资源,重点关注未来的研究,寻找适合培训计划的学习周期方法。
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引用次数: 0
Distance-Measurement-Decision-Making Backend System Using NodeJS 基于NodeJS的距离测量决策后端系统
Leonardo Theoson, Randy Anthony, James Purnama
A potential start-up business in the catering industry called Kunyahku which aims to source food products from micro-catering businesses while offering customers many options of ordering food products for their events. Because customers do not initially know from which vendors their order comes from, and only consider Kunyahku as the brand representing the vendors, Kunyahku has a unique business process which no current existing e-commerce platforms is able to accommodate. A custom backend system with the ability of calculating the most suitable vendor based on the closest distance between the vendor and the customer is required to support the e-commerce business process. Because the state of the business is still a startup, financial resources are limited and therefore minimizing expenses is. the ultimate goal therefore the usage of cost minimalized platforms such as NodeJS programming language, self-created codes to run algorithms, etc.
这是一家潜在的餐饮初创企业,名为Kunyahku,旨在从微型餐饮企业采购食品,同时为客户提供多种订购食品的选择。由于客户最初并不知道他们的订单来自哪个供应商,只将Kunyahku视为代表供应商的品牌,因此Kunyahku具有当前现有电子商务平台无法容纳的独特业务流程。支持电子商务业务流程需要一个自定义后端系统,该系统能够根据供应商和客户之间的最近距离计算最合适的供应商。因为业务的状态仍然是一个启动,财务资源是有限的,因此最小化费用是。因此,最终目标是使用成本最小化的平台,如NodeJS编程语言,自行创建的代码来运行算法等。
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引用次数: 1
Importance of Internalization of Tacit Knowledge Sharing in Project Management Case in XYZ Finance 隐性知识共享内部化在XYZ财务项目管理案例中的重要性
Ryant A. Herwansyah
Tacit Knowledge is an essential part of the project, especially in a software development project. Because project without tacit knowledge sharing can lead to project failure. And there is concern in XYZ Finance Project did not have a good tacit knowledge sharing. We investigated these concerns by conducting an interview study with the team lead of the project, asking about his experience about this project. The result show that it is important to document and keep the tacit knowledge sharing with the use of SECI Framework
隐性知识是项目的重要组成部分,尤其是在软件开发项目中。因为缺乏隐性知识共享的项目会导致项目的失败。并且存在在XYZ金融项目中没有很好的隐性知识共享的担忧。我们通过与项目的团队领导进行访谈研究来调查这些问题,询问他关于这个项目的经验。结果表明,使用SECI框架来记录和保持隐性知识共享是非常重要的
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引用次数: 0
期刊
Proceedings of the 2021 International Conference on Engineering and Information Technology for Sustainable Industry
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