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- 谁能推荐一些用在YL方面比较好的红外热像仪产品?高分悬赏
2011-01-20 06:27:04
402
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- 红外热像仪可以用在哪些地方?
- 红外热像仪可以用在哪些地方?
2017-12-20 22:02:55
500
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- 谁能给我推荐一家在机器视觉领域方面做得比较好的公司。
2016-12-01 18:06:21
405
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- 红外热像仪那个牌子的比较好?
2013-08-18 00:14:08
382
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- 红外热像仪什么牌子的比较好?
2017-12-19 23:03:41
410
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- 高分悬赏 买个笔记本电脑
- 我想买个笔记本 主要选择 戴儿 HP 联想 1.价格在3000-5000 2.能玩游戏的 3.性能要好 散热啊什么的 4.售后服务好点 别买了就当没一回事了 买的时候么态度很好的 5.我根本不懂笔记本的 大家Z好详细介绍 害人的 千万别来
2009-04-20 03:41:36
370
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- PT100 和 PT1000用在工业测温方面,哪种比较好,请推荐几个进口的,谢了
2012-11-29 04:52:26
385
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- 谁能推荐一些比较有知名度的玻璃棉品牌?
2018-03-14 09:26:50
374
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- 红外热像仪有哪些比较好的品牌、型号?
2017-05-21 07:08:23
393
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- 有没有做机器视觉方面比较好的书推荐两本?
- Z好包括一些特殊检测方面的打光测试案例与光源应用方面的技术.
2012-02-28 12:43:35
486
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- 高分悬赏,关于各种建筑的结构
- 我需要下列物体的结构类型,连接方式,受力特点!! 栅栏,圆形陶瓷装饰品,冰山,高层建筑的穹顶,玻璃钢过盖,竹排,汽车外壳,人的头盖骨,古罗马斗兽场。 在线等,十万火急!!1
2007-12-11 01:42:41
315
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- 高分悬赏,会人工英语翻译的进~~~
- AnalyticalMethodsofVolatileAnalysisManyanalyticalmethodshavebeenusedforthesamplingandisolationofvolatilecompoundsgeneratedduringlipidoxidation.Sampling,usingmethodssuchas... Analytical Methods of Volatile Analysis Many analytical methods have been used for the sampling and isolation of volatile compounds generated during lipid oxidation. Sampling, using methods such as extraction, headspace analysis, and solid-phase microextraction (SPME), offers a means to collect and often pre-concentrate volatiles from samples. Isolation allows the separation of the extracted volatiles and is often accomplished using gas chromatography (GC) or high-pressure liquid chroma- tography (HPLC). Aromatic compounds are produced in low con- centrations at the onset of lipid oxidation, thereby requiring a method that not only isolates the compounds, but concentrates them. In addition, food provides a complex matrix from which to extract the compounds. Several studies have addressed the bind- ing of lipid oxidation products to proteins (O’Keefe and others 1991; Gutheil and others 1992). These bound compounds need to be liberated before the oxidation products can be accurately quantified. Sample preparation can complicate the assessment of lipid oxidative status as a number of these lipid oxidation prod- ucts are thermally generated. Care must be taken to extract the compounds present in the sample while not generating additional oxidation products or allowing the volatile compounds to de- grade during the extraction process. The most common procedures reported in the literature for the determination of lipid oxidation products from muscle foods are GC methods. In this review, sampling methodologies of distillation and solvent extraction, and isolation methods associated with GC and HPLC analyses will be discussed. Within those gas chromato- graphic methodologies, static HS, dynamic purge-and-trap HS, and solid-phase microextraction (SPME) will be addressed. A summary of the different isolation methods is presented in Table 1. 只要翻译的通顺即可。虽然长了点,可是80分还是值得的吧 展开
2018-12-02 23:51:22
329
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- 如何区分红外热像仪和热成像仪 哪个比较好
2016-11-05 03:56:25
420
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- 什么型号的红外热像仪可以用在地暖的检查?
- 室内的地暖管在装修后一般都埋在8CM左右的水泥层下,什么型号的红外热像仪可以比较清晰的看到底下的管道,应用于地暖管道的测漏点堵塞点检查。价格在三万以下的。
2013-10-11 10:33:30
504
4
- 挤出机英语翻译。。。在线等。高分悬赏
- Simplified Flow Theory for Screw Extruders The flow behavior of a viscous liquid in the channel of an extruder screw is shown to be similar to the flow behavior of viscous liquids between infinite parallel plates, one of which is station... Simplified Flow Theory for Screw Extruders The flow behavior of a viscous liquid in the channel of an extruder screw is shown to be similar to the flow behavior of viscous liquids between infinite parallel plates, one of which is stationary and the other moving. Assuming Newtonian behavior of the liquid, a differential equation was derived which relates the rate of extrusion and the die pressure to the screw and die geometry and to the operating variables. Integrated flow equations are given for the special case in which the viscosity of the liquid is constant throughout the screw channel (isothermal extrusion). Equations are also given for the case in which the dimensions of the screw channel are functions of their position along the length of the screw. IN THE preceding paper ( 1 )o f this symposium the literature pertaining to the problem of viscous flow in extruders was reviewed. In this paper the development of simplified but more useful flow equations is presented. The synibols and nomenclature used in this paper are defined in the preceding paper (1). The flow mechanism of the viscous liquid in the helical channel of the screw can be better understood if one imagines that the channel be unrolled and laid out on a flat surface. Figure 1 shows this concept of the screw channel. If the lower plate, representing the screw surface, is held stationary and the upper plate, representing the barrel surface, is moved in the direction of the arrow, the relative motions will be the same as those existing in an extruder where the barrel is stationary and the screw rotates. Assuming that the liquid wets both surfaces, the motion of the barrel drags the viscous liquid along with it, while the stationary plate exerts an equal and opposite drag. The velocity of the liquid, relative to the screw, is a maximum at the barrel surface and zero at the screw surface. There is also a directional factor involved, since the channel is inclined at angle p to the direction of motion. Therefore, in computing the flow rate in the channel we break up the velocity into two components: one of these acts directly down the channel, and the other acts at right angles to it. We call the component which acts down the channel drag velocity, and the component which acts at right angles to this transverse velocity. At the end of the channel there is generally a die or some other restriction to flow. This sets up a pressure gradient down the channel causing a flow in the reverse direction to the drag flon. There is one other flow that must be considered. Generally the screw does not fit perfectly inside the barrel. In other words, there is a clearance between the top of the screw threads and the barrel surface. 展开
2009-03-29 12:37:44
622
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- 什么是红外热像仪,红外热像仪特点
2018-12-15 21:01:56
341
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