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针对脂肪酸值快速批量检测的需要,新开发了全自动脂肪酸值测定仪,采用该仪器测定粮食脂肪酸值,与现行国标方法进行比较,测试该仪器和仪器方法的准确度、重复性、台间差等技术参数。同时比较仪器法和国标法的测定效率。实验结果表明:仪器方法和国标方法测定结果的标准偏差不存在显著性差异;仪器的重复性标准差不超过国标方法中给定的标准差;稻谷回收率在98.7%～106.1%之间,玉米回收率在103.7%～106.3%之间,理论添加脂肪酸值与测定仪实测值之间有较好的相关性,线性相关系数r=0.9997,具有较宽的测量范围;3台仪器测定结果之间不存在显著性差异,符合稻谷、玉米样品储存品质检测要求。同时仪器法还减少了检验人员测定全过程的工作量,降低了检测任务对人员的技能要求。 相似文献
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辐照保鲜：提高大米加工水平 总被引：1，自引：1，他引：0
何新益 《农产品加工．学刊》2010,(5):10-11
大米保鲜技术是防止大米在仓储、加工、市场流通过程中生虫长霉,延缓其陈化的技术。大米的食味主要取决于大米直链淀粉、蛋白质、水分含量及脂肪酸值的高低,其中与直链淀粉、蛋白质含量和脂肪酸值成反比,与水分含量成正比。 相似文献
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通过对影响粮食脂肪酸值测定结果的粉碎细度、温度、标准滴定液等因素的探讨,确定了粮食脂肪酸值测定的最佳条件,即粉碎细度达到一次性过40目筛,环境温度15℃~20℃以及测定时标准滴定液的及时更换等条件。 相似文献
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温度对稻谷脂肪酸值测定的影响 总被引：1，自引：0，他引：1
脂肪酸值是反映稻谷储存品质的主要指标之一。研究了脂肪酸值测定过程中环境、无CO2蒸馏水和无水乙醇的温度对稻谷脂肪酸值测定结果的影响。研究结果表明：环境、无CO2蒸馏水的温度对脂肪酸值测定结果影响不明显,而无水乙醇的温度对测定结果有明显的影响。因此,在进行稻谷脂肪酸值测定试验时,严格控制无水乙醇的温度能够有效确保测定结果的重复性和准确性。 相似文献
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黄雅婷 《农产品加工．学刊》2019,(11)
对稻谷脂肪酸值检测的国家标准方法在提取、过滤、转移方面进行了改进,以期提高稻谷脂肪酸值检测工作效率、减轻劳动强度。同时,对国标法和改进法的测定结果进行比较分析。结果表明,改进法有良好的准确度、精密度和回收率,且测定快速、节时省工。 相似文献
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本文尝试采用统计分析工具——测量系统分析(MSA)的方法应用于粮食检测工作,利用计量型测量系统分析方法量具重复性和再现性研究(Gage R&R)的方法,借助MINITAB软件的协助,在实际稻谷脂肪酸值的检测工作中,通过大量实验,对量具的重复性和再现性进行了统计和分析。对测量结果采用测量系统分析中方差分析的数理统计分析方法进行了数据统计分析。通过分析,确定了稻谷脂肪酸值检测系统的精确程度,并进一步分析了脂肪酸值检测系统波动的主要来源;通过在粮食检测行业中尝试使用MSA方法,建议在粮食品质检测中广泛推广测量系统分析方法,同时,建议提高粮食测量系统的自动化程度,以减少人为因素带来的测量系统波动。 相似文献
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糙米储藏过程中表面颜色变化的研究 总被引：1，自引：2，他引：1
对表面性状和储藏温度不同的糙米进行储藏实验,主要用测色色差计测定了糙米储藏过程的表面颜色变化.结果表明:用测色色差计可以检测到糙米储藏过程的米粒表面颜色的变化;储藏过程米粒表面的L值、a值、b值随着米粒表面损伤程度增大,储藏温度升高,储藏时间延长而增大;糙米储藏过程的色差⊿E值变化与脂肪酸值增加的趋势一致,两者的相关系数r=0.90,具有较高的关联性;在建立色差⊿E值与脂肪酸值的关联的基础上,有用测色色差计测定色差⊿E值代替脂肪酸值测定的可能性. 相似文献
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用活性炭作脱色剂对粮食脂肪酸值测定的影响 总被引：1，自引：0，他引：1
国家粮食局、国家质量技术监督局于2000年7月印发的《粮油储存品质判定规则》中已将脂肪酸值作为粮食陈化判定的一项重要指标，并引用了国家推荐标准GB／T15684-1995谷物制品脂肪酸值测定法作为测定标准。2004年4月国家发展和改革委员会、国家粮食局、国家标准化管理委员会联合印发了《稻谷和玉米储存品质判定规则》（国粮发[2004]43号），把稻谷、玉米脂肪酸值的测定提到了重要的议事日程，因此，脂肪酸值测定的准确性是一个不容忽视的问题。下面我们就脂肪酸值测定过程中遇到的影响测定结果准确性的问题与同行们进行探讨。 相似文献
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Through the analysis of hydraulic-mechanical transmission and the modeling of torque converter, the traction performance of an automatic transmission car between hydraulic transmission and mechanical transmission under different throttle angle and different gears is discussed, and the control rule among dynamic gear-shifting, economic gear-shifting and mixed gear-shifting is made. Furthermore, the control strategy of engagement, disengagement and slip-control of lock-up clutch is set down. Simulation of integrated control of hydraulic-mechanical transmission which applies slip-control under multi-load-condition is carried out, and the result shows that the fuel economy of such type of the car gets an increase by 2.36%. 相似文献
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dSPACE is a prototype development and real-time control testing platform which is based on MATLAB/Simulink software. By establishing mathematic model of hydraulic automatic transmission system, the shift rules are achieved. A testing platform for hydraulic automatic transmission system is developed whose control software is programmed by simulink and using the dSPACE as the centre controller. The experiment of electric throttle control and power performance matching control of hydraulic automatic transmission system is carried out. the result shows that well matching performance of hydraulic automatic transmission system can be realizedby using the control strategy proposed in this paper, it provides a fast and efficient approach for researching and developing the hydraulic automatic transmission system. 相似文献
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为了研究DZZ6 型和CAWS600 型自动气象站观测资料之间的差异性,利用庆阳市西峰国家基本气象站、环县国家基本气象站、合水气象站有效数据资料,对DZZ6 型ISOS 软件运行的自动气象站和CAWS600 型OSSMO 2004 软件运行的自动气象站观测的气压、气温、湿度等资料进行气候和统计分析。结果表明：2 套自动气象站数据较为完整,缺测率较低;通过差值分析2 套站数据一致率较高,要素差值较小,符合相应的规范要求;检验得出用于实际业务工作的客观定量化结论,2 套站自动观测数据不经序列订正就可以合并统计、互相替代;个别要素差异略大的原因可能与仪器的生产厂家、型号、性能有关,不存在系统性误差。 相似文献
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《保鲜与加工》2003,(10):10-14
Gear change automatic is the main development trend for power train of heavy vehicle. In this paper, transmission theory and characteristic of several type heavy vehicle, include the automatic transmission system development trend of overseas heavy vehicle, especially for the application of electrical control automatic manual transmission system in heavy vehicle were introduced, the analysis of develop the automatic transmission system for domestic heavy vehicle was put forward, the key technique which must be solved for the exploitation of electrical control automatic manual transmission system in heavy vehicle were discussed. 相似文献
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通过对不同国别、不同质量进口大豆入仓杂质分布的差异性分析研究,表明进口大豆产地和杂质含量对杂质的均布有一定的影响,且杂质含量的影响大于产地国别影响;大豆入仓自动分级后杂质大多数聚集在中心直径10m的圆形区域内,其中杂质中的大杂是主要的贡献因子,小杂次之,鉴于此提出浅圆仓防分级设备研发方向。 相似文献
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A dual closed-loop automatic cruise control system is proposed according to the properties of the AMT system with cruise control function inside, which is developod by the authors. The human simulated intelligent fuzzy control is applied to the inner loop of throttle position control while the conventional fuzzy control is applied to the outer loop of vehicle speed control. The scheme of the whole control system and the design process of the controller are presented. The experimental results show that with the proposed dual closed-loop control system, the unstable phenomena of engine speed can be eliminated and the throttle control responses fast without buffeting. Moreover, the system has the advantages of easy manipulation and reliable operation. The controller has the advantages of free of accurate mathematical model and easy to carry out and high robust and so on. 相似文献
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Clutch Control for Automotive Start-up Process 总被引：1，自引：0，他引：1
The conventional driveline with manual gearbox and dry clutch can be retro-fitted to manipulate automatically,so that the electo-mechanical components or the Automated Mechanical Transmission has been obtained.The clutch engagement position for automotive start-up process can be controlled by the fast-low-fast speed.How to control the clutch engagement during the slipping stage is the key to clutch control.The mostly influent factors of the clutch engagement during start-up process have been analysed thoroughly from the practical point of view.The strategy of clutch control has been proposed on the principle of lessening the start-up jerk and the friction work.It is successfully applied to Santana model,which can be proved by the road test of the vehicle on the slope. 相似文献
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The gearshift of an automated mechanical transmission is performed by cutting off the power.The key to the gearshift of AMT is shift quality.Theinfluence of the control stategy during shifting processon shift quality is analysed.While resuming the power,the derivative of the speed differencebetween the clutch active disc and the clutch slave disc time instant is in direct proportion tothe discontinuity of the vehicle acceleration at the lock-up time instant.The large discontinuity of the vehicle acceleration will result in the jerk and the oscillation of vehicle that make passengers uncomfortable.A control stategy is proposed,that make small the derivative of the speed differencebetween the clutch active disc and the clutch slave disc by the integrated control of engine and clutch.The road test shows that the control stategy improves the shift quality. 相似文献
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大型粮食干燥塔的自动控制 总被引：2，自引：0，他引：2
本文通过DM—150型干燥过程控制仪在DLG－500型干燥塔的成功应用,详细介绍了该自动控制系统的原理、性能、特点、操作过程及使用效果． 相似文献