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Structural Investigation of Poly(lactic acid) Cast Film by Using Synchrotron X-ray Scattering Technique 用同步x射线散射技术研究聚乳酸铸造膜的结构
Pub Date : 2018-03-20 DOI: 10.14416/J.IJAST.2018.03.002
Suttinun Phongtamrug, Phatcharin Phakpharin, S. Soontaranon, S. Rugmai
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引用次数: 1
A Memory Integrated Artificial Bee Colony Algorithm with Local Search for Vehicle Routing Problem with Backhauls and Time Windows 基于局部搜索的记忆集成人工蜂群算法求解带时间窗的车辆路径问题
Pub Date : 2018-03-05 DOI: 10.14416/j.ijast.2018.03.001
Naritsak Naritsak, K. Asawarungsaengkul
The vehicle routing problem is a logistics problem which receives much attentions in logistics management. This paper presents a Memory integrated Artificial Bee Colony Algorithm (MABC) to solve the Vehicle Routing Problem with addition of Backhauls and Time Windows, known as the VRPBTW. In VRPBTW, a homogenous fleet of vehicles are utilized to deliver goods to linehaul customer set and pick up goods from backhaul customer set. Vehicle capacity, sequence of linehaul/backhaul and time windows are the three of major constraints for this problem. The VRPBTW’s objective is to determine the optimal routes with minimum of total distance that satisfies all constraints. The proposed algorithm was tested on Gelinas’s VRPBTW benchmark problems. MABC is developed by adding the memory to Artificial Bee Colony (ABC). The local search algorithms including λ-interchange and 2-opt* are utilized to search for the better solutions. The computational results show that MABC significantly yields the good solutions in terms of total travelling distance. Finally, it can be concluded that the performance of the proposed MABC algorithm is superior to the existing studies in term of quality solution.
车辆路径问题是物流管理中备受关注的一个物流问题。本文提出了一种基于记忆集成的人工蜂群算法(MABC)来解决带有回程和时间窗的车辆路径问题,即VRPBTW。在VRPBTW中,使用同质车队向线路客户组交付货物,并从回程客户组提取货物。车辆容量、线路/回程顺序和时间窗是该问题的三个主要约束条件。VRPBTW的目标是确定满足所有约束条件的总距离最小的最优路径。该算法在Gelinas的VRPBTW基准问题上进行了测试。MABC是通过在人工蜂群(ABC)中添加记忆体来开发的。利用λ-interchange和2-opt*局部搜索算法寻找较优解。计算结果表明,MABC算法在总行驶距离上得到了较好的解。最后,可以得出结论,所提出的MABC算法在质量解方面的性能优于现有研究。
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引用次数: 0
Development of Solar Oven for Controlling Fungus in Tea Oil Seeds 茶油种子真菌防治太阳灶的研制
Pub Date : 2018-02-26 DOI: 10.14416/j.ijast.2018.02.001
Pairoj Duangnakhon, Supakit Thepbundit, Mingkwan Somphruek
The purposes of this research are to develop and investigate the efficiency of solar oven for controlling fungus in tea oil seeds. This research also studies how to effectively roast tea oil seeds using 2 binary tree system with 4 scenarios method which consists of A1B1, A1B2, A2B1, and A2B2. The sample used in this study is 10 kg of tea oil seeds originally from Tea Oil and Plant Oils Development Center in Mae Sai District, Chiang Rai Province. The efficiency testing results show that the solar oven offers the maximum temperature of 69°C and the minimum moisture content of 33%. This solar oven is then used to roast tea oil seeds using 4 different methods for 7 day. The experimental results indicate that the A1B1 roasting method gives moisture content of 7.408%, and drying ratio of 0.440% with no fungus. While A1B2, A2B1, and A2B2 roasting methods provide moisture content of 5.967%, 0.102%, 0.003%, and drying ratio of 0.355%, 0.006%, 0.0001% respectively. The fungi are found at the end of experiments in all three methods.
本研究的目的是开发和研究太阳灶对茶油种子真菌的控制效果。本研究还研究了如何使用由A1B1、A1B2、A2B1、A2B2组成的2二叉树系统和4种场景法有效烘烤茶油种子。本研究使用的样品为10公斤茶油种子,原产于清莱省梅赛区茶油和植物油开发中心。效率测试结果表明,该太阳能烤箱的最高温度为69℃,最低含水率为33%。然后用这个太阳灶用4种不同的方法烤茶油籽7天。试验结果表明,A1B1焙烧方法在无真菌情况下,可获得7.408%的含水率和0.40%的干燥率。A1B2、A2B1和A2B2焙烧方式的含水率分别为5.967%、0.102%、0.003%,干燥比分别为0.355%、0.006%、0.0001%。真菌是在所有三种方法的实验结束时发现的。
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引用次数: 0
The Natural Pigments in Pigmented Rice Bran and Their Relation to Human Health: A Literature Review 色素米糠中的天然色素及其与人体健康的关系
Pub Date : 2018-01-30 DOI: 10.14416/J.IJAST.2018.01.004
V. Seechamnanturakit, T. Karrila, C. Sontimuang, A. Sukhoom
Carotenoids and polyphenols are the natural pigments which are distributed to the pigmented rice bran. These pigments can prevent chronic disorders related to oxidative stress and antioxidant properties. This article focuses on carotenoids and polyphenols as ones among the natural pigments. Carotenoids and polyphenols exert an antioxidant property and anti-inflammatory agents; enhance immune responses and prevent Age-related Macular Degeneration (AMD). In combination with protein and dietary fiber, the bioavailability of carotenoids decreases in gastrointestinal tract. The inefficient absorption of anthocyanins in the small intestine resulted from unstability of the physiochemical pH and the degradation of anthocyanins in the small intestine. These have led to low bioavailability of anthocyanins.
类胡萝卜素和多酚是分布在色素米糠中的天然色素。这些色素可以预防与氧化应激和抗氧化特性有关的慢性疾病。本文重点介绍了天然色素中的类胡萝卜素和多酚类。类胡萝卜素和多酚具有抗氧化和抗炎作用;增强免疫反应,预防老年性黄斑变性(AMD)。与蛋白质和膳食纤维结合使用,类胡萝卜素在胃肠道中的生物利用度降低。小肠对花青素的吸收效率低下是由于小肠内理化pH值的不稳定和花青素的降解。这导致了花青素的低生物利用度。
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引用次数: 8
Vertical Variation of Nitrogen Oxide (NOx) Concentration Using a Backward Air Mass Trajectories Model in an Urban Area of Bangkok, Thailand 使用向后气团轨迹模式的泰国曼谷市区氮氧化物(NOx)浓度垂直变化
Pub Date : 2018-01-16 DOI: 10.14416/J.IJAST.2018.01.003
T. Rungratanaubon, Parkpoom Choomanee, S. Bualert, B. Shutes
Bangkok Metropolitan is a rapidly growing city with both industrial and urban area expansion resulting in the generation of a significant air pollutant; Nitrogen Oxide (NOx = NO + NO2). This research studied the variation of Nitrogen Oxide concentration in an urban area at 30 m and 110 m above ground by applying the HYSPLIT model to simulate the backward trajectories movement of air mass using the past 3 days of data from an air quality and microclimate monitoring station at Kasetsart University, Bangkok from January 2016 to February 2017. The results showed that the concentration of Nitrogen Oxide at 30 m above ground is higher than the concentration at 110 m above ground. The concentration trended to increase in winter (October 2016 to February 2017). According to the backward trajectories modeling, the major direction of air mass movement at 30 m above ground, category 1 (N-NE) and category 2 (NE-E), occupying 86% of total movement direction (concentration of NOx ranged from 4.02 to 96.35 ppb) meanwhile the major direction of air mass movement at 110 m above ground, category 1 (N-NE) and category 2 (NE-E), occupying 79% of total movement direction (concentration of NOx ranged from 3.93 to 51.50 ppb). The air mass moved through the different land use types, human activities and industrial areas. This study can be applied as a guideline for microclimate surveillance and monitoring of NOx concentration influenced by air mass movement.
曼谷大都会是一个快速发展的城市,工业和城市面积的扩张导致了严重的空气污染物的产生;氮氧化物(NOx = NO + NO2)。本研究利用2016年1月至2017年2月曼谷Kasetsart大学空气质量和小气候监测站近3天的数据,应用HYSPLIT模型模拟了城市区域离地30 m和110 m处的氮氧化物浓度变化。结果表明:30 m处氮氧化物浓度高于110 m处氮氧化物浓度;浓度在冬季(2016年10月- 2017年2月)呈上升趋势。反轨迹模拟表明,在离地30 m处,气团的主要运动方向为1类(N-NE)和2类(NE-E),占总运动方向的86% (NOx浓度范围为4.02 ~ 96.35 ppb);在离地110 m处,气团的主要运动方向为1类(N-NE)和2类(NE-E),占总运动方向的79% (NOx浓度范围为3.93 ~ 51.50 ppb)。气团穿过不同的土地利用类型、人类活动和工业区。该研究可为小气候监测和气团运动对NOx浓度的影响监测提供指导。
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引用次数: 5
Low Frequency Noise Reduction with Active Noise Control in Laboratory Settings 在实验室环境中采用主动噪声控制来降低低频噪声
Pub Date : 2018-01-05 DOI: 10.14416/J.IJAST.2018.01.002
S. Junsupasen, Witthawas Pongyart, M. Jongprasithporn, N. Yodpijit
Noise problem becomes a major concern for public health throughout the world. This research is conducted to investigate how to reduce low-frequency noise in laboratory settings using Active Noise Control (ANC) technique. Experiments are performed under two conditions: 1) in a close room (6.7 m wide, 11 m long, and 2.87 m high), and 2) in an open field (8.2 m wide and 18 m long). Low-frequency noise at 200 Hz is generated by the 1,000 W speaker (as noise source), and the 1,200 W speaker is used as noise cancelling speaker. Error microphone and spectrum analyzer are installed for measuring noises. Findings indicate that noise reductions of 14.38 dB and 10.73 dB can be made in a close room and in an open field, respectively. Applications and limitations for this research are also discussed.
噪声问题已成为全世界关注的一个重大公共卫生问题。本研究旨在探讨如何使用主动噪声控制(ANC)技术来降低实验室环境中的低频噪声。实验在两种条件下进行:1)在一个封闭的房间(宽6.7 m,长11 m,高2.87 m)和2)在一个开阔的场地(宽8.2 m,长18 m)。200hz的低频噪声由1000w的扬声器产生(作为噪声源),1200w的扬声器作为降噪扬声器。安装误差麦克风和频谱分析仪测量噪声。结果表明,在封闭的房间和开阔的场地中,噪声分别降低14.38 dB和10.73 dB。讨论了本研究的应用和局限性。
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引用次数: 0
pH-Responsive Styrene Maleic Anhydride with Improved Surface Activity 表面活性提高的ph响应型苯乙烯马来酸酐
Pub Date : 2018-01-04 DOI: 10.14416/J.IJAST.2018.01.001
P. Punyamoonwongsa, Wichsuda Tangsongcharoen, Piangtawan Phoungtawee, B. Tighe
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引用次数: 4
Effect of Germinated Colored Rice on Bioactive Compounds and Quality of Fresh Germinated Colored Rice Noodle 发芽彩米对鲜发芽彩米粉生物活性成分及品质的影响
Pub Date : 2017-12-27 DOI: 10.14416/J.IJAST.2017.12.008
N. Thao, Chutamat Niwat
The objectives of the study were 1) to investigate the effect of pH (pH 6 and 7) on bioactive compounds and antioxidant activity of germinated colored rice, and 2) to study the effect of adding various ratios of germinated colored rice (0, 10, 20, 30, 40 and 50%) on physicochemical property and sensory evaluation of fresh rice noodles. Two species of colored rice, namely Riceberry (RB) and Hom-Nil (HN) were employed as samples for germination. The results indicated that total phenolic content, total anthocyanin content, GABA content and antioxidant activity (FRAP and DPPH assay) were considerably higher when colored rice was soaked at pH 6 compared to pH 7 (P < 0.05). The bioactive compounds and proximate compositions of fresh rice noodles were significantly enhanced when addition of Germinated Colored Rice (GCR) increased (P < 0.05). However, texture profile analysis of the fresh GCR noodle had remarkable decrease in terms of cohesiveness, springiness and chewiness which had lowest values at 50% supplement of GCR. Lightness (L*) of the noodle reduced whereas redness (a*) and yellowness (b*) incresed significantly (P < 0.05) when GCR addition increased. Additionally, there was no distinct difference in sensory evaluation scores from thirty untrained panelists by adding 10 and 20% GCR in the fresh noodle (P > 0.05). This study concluded that the incorporation of GCR up to 20% into the formulation could be used to increase nutritional value of the fresh germinated colored rice noodle.
研究pH值(pH值6和pH值7)对发芽彩米生物活性成分和抗氧化活性的影响;研究不同比例的发芽彩米添加量(0、10、20、30、40和50%)对鲜米粉理化性质和感官评价的影响。以两种有色水稻,即丽莓(rbb)和荷米(HN)为样品进行萌发试验。结果表明,pH为6的彩米总酚含量、总花青素含量、GABA含量和抗氧化活性(FRAP和DPPH)显著高于pH为7的彩米(P < 0.05)。随着发芽彩米(GCR)添加量的增加,鲜米粉的生物活性成分和近似成分显著增加(P < 0.05)。鲜GCR面条的质地分析结果显示,鲜GCR面条的黏结性、弹性和咀嚼性均显著降低,其中GCR添加量为50%时最低。随着GCR添加量的增加,面条的亮度(L*)降低,红度(a*)和黄度(b*)显著升高(P < 0.05)。此外,在鲜面中添加10%和20% GCR对30名未经培训的小组成员的感官评价评分无显著差异(P < 0.05)。本研究表明,在配方中添加20%的GCR可提高鲜发彩米粉的营养价值。
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引用次数: 8
Plant-wide Process Simulation of Ethanol Production from Empty Fruit Bunch 用空果束生产乙醇的全植物过程模拟
Pub Date : 2017-12-21 DOI: 10.14416/J.IJAST.2017.12.007
Darunwan Chuenbubpar, T. Srinophakhun, Panuwat Tohsakul
Lignocellulosic biomass exhibits itself as an alternative material for ethanol production. Ethanol can be synthesized from cellulose and hemicellulose obtained from an empty fruit bunch. Aspen simulation is used for process design and its capacity. Hot Compressed Water pretreatment (HCW) is the first step to improving ethanol production. The optimal conditions of HCW are 190°C and 15 minute with a cellulose content of 56.56%. Ethanol is converted from lignocellulosic derivative via hydrolysis and fermentation processes. The extractive distillation system is proposed to purify. There are two different operating conditions (reflux ratio, feed stage, and distillate to feed ratio) at the solvent to feed ratio (S/F) of about 0.51. Ethanol of 10,000 kg could be produced from 48,000 kg of EFB with product purity greater than 99.5 wt%.
木质纤维素生物质是乙醇生产的一种替代材料。乙醇可以由从空果束中获得的纤维素和半纤维素合成。阿斯彭模拟用于工艺设计及其容量。压缩热水预处理(HCW)是提高乙醇产量的第一步。HCW的最佳条件为190℃,15 min,纤维素含量为56.56%。乙醇是由木质纤维素衍生物通过水解和发酵过程转化而来的。提出了萃取精馏系统进行提纯。在溶剂与进料比(S/F)约为0.51时,有两种不同的操作条件(回流比、进料级和馏分与进料比)。48,000公斤EFB可生产10,000公斤乙醇,产品纯度大于99.5% wt%。
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引用次数: 5
Study of Temperature and Wear Variations of Aluminium in General Dry Sliding Contact 铝在一般干滑动接触中的温度和磨损变化研究
Pub Date : 2017-12-15 DOI: 10.14416/j.ijast.2017.12.006
J. Malík, S. Koetniyom, Abdelkrim Lamjahdy, B. Markert
The present research focuses on the study of temperature and wear variations of aluminium in general dry sliding contact conditions. The main aim of this research is to develop a simulation methodology in order to calculate temperature and wear variations of different materials (here: aluminium on cast iron) in general dry sliding contacts. The developed simulation methodology is based on an uncoupled thermo-mechanical and wear analysis. The widely spread finite element software Abaqus is used for the numerical investigations. For calibration and validation, experimental investigations are performed with a pin-on-disc test bench. A comparison between the experimental and the numerical results is presented and discussed. The experimental results are in close agreement with the numerical results. For the considered test case (rotational velocity of the disc=300 rpm and load on the pin=110 N) the numerical analysis predicts a maximum temperature of 63°C in comparison to 65°C in the experiment. For the considered test case (rotational velocity of the disc=600 rpm and load on the pin=150 N) the simulation predicts a maximum temperature of 93°C in comparison to 97°C in the experiment. The study concludes that the developed simulation methodology is accurate and can be used to calculate temperature and wear variations of different materials in general dry sliding contact.
本文主要研究了铝在一般干滑动接触条件下的温度和磨损变化。本研究的主要目的是开发一种模拟方法,以计算一般干滑动触点中不同材料(这里:铝和铸铁)的温度和磨损变化。开发的仿真方法是基于不耦合的热-机械和磨损分析。采用广泛应用的有限元软件Abaqus进行数值研究。为了校准和验证,实验研究是在一个销盘试验台进行的。对实验结果和数值结果进行了比较和讨论。实验结果与数值计算结果吻合较好。对于所考虑的测试用例(磁盘的转速=300 rpm,销上的负载=110 N),数值分析预测最高温度为63°C,而实验中的最高温度为65°C。对于考虑的测试用例(磁盘的转速=600 rpm,引脚上的负载=150 N),模拟预测的最高温度为93°C,而实验中的最高温度为97°C。研究表明,所建立的模拟方法是准确的,可用于计算不同材料在一般干滑动接触下的温度和磨损变化。
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引用次数: 1
期刊
British Journal of Applied Science and Technology
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