全部评论(4条)
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- wangqun121212 2011-05-30 00:00:00
- 以经验,总功率(电机功率+加热功率的)的30%-40%之间,耗电量上就能看出。
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- 明天过国庆 2011-05-30 00:00:00
- 按期生产过程中产生的热量(输入功率、加热功率)来计算。
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- zg12345678930 2011-05-30 00:00:00
- 你看一下功率不就知道了。基本上能够产生功率的七八层热量!
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- 梳梳梳梳子啊 2011-05-30 00:00:00
- 我不明白你要散热量来干什么?是要订制水塔还是搞车间散热。还有实际上算这个没有多少用
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热门问答
- 请问一台注塑机的散热量为多少?数据如何得出的?急需!!高分悬赏
2011-05-29 16:13:14
404
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- 针焰试验仪数据如何得出?
针焰试验仪数据如何得出?
2020-09-29 15:29:18
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- 高分悬赏 买个笔记本电脑
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2009-04-20 03:41:36
338
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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
293
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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
260
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- 高分悬赏,单色,像素96宽*16高的Logo,格式为bmp
- 如图一样,单色,形状酷点,Z好不要带中英文字,只有图案Z好,多发几张。
2018-11-24 03:55:35
411
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- 请问普通的450T的注塑机一小时的耗电大概为多少呢?
2011-08-03 21:47:54
641
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- 有关大学化学的英语翻译~进来看看。高分悬赏
- 3.1敌草隆吸附等温线 图 2a-c 展示了在没有控制酸碱度的情况下,活性碳在不同温度时对敌草隆的吸附量。从各图可见,它们在研究所涉及的温度范围内都很完整,覆盖至大约 55 mmol L-1的范围。在整个受测试的浓度范围内,敌草隆的吸附量都随着温度显着增加,因此... 3.1敌草隆吸附等温线 图 2a-c 展示了在没有控制酸碱度的情况下,活性碳在不同温度时对敌草隆的吸附量。从各图可见,它们在研究所涉及的温度范围内都很完整,覆盖至大约 55 mmol L-1的范围。在整个受测试的浓度范围内,敌草隆的吸附量都随着温度显着增加,因此,根据观察所得,温度对敌草隆吸附能力的影响,与Z常见的吸附趋势不同。这种明显的吸热表现,是由于溶液中的敌草隆份子在温度增加时更容易出现去溶剂化的情形,因而令敌草隆份子的平面性和扩散率都有所增加[10,11,27]。在diyi次进行时,图 2a 的均衡等温线属于 L 类(更仔细而言则属 Giles 分类法中的 L-3 分类 [12]),因而显示出,敌草隆较低的水溶度和多层吸附现象令它有较好的吸附能力。该条等温线diyi部份所呈现的坡度递减,并在高处转平的情形,是大部份稀薄溶液的常见吸附情形。这个模式代表可供吸附的表面被逐渐占用。虽然等温线在高处转平所展现的饱和情况被理解为是单层吸附完成的结果,却不一定能显示出一层排列紧密的吸附物本身的序列情况。该层吸附物也可以包含有溶剂的份子和吸附物的份子群,而且,它们除了吸附在原有表面的可吸附位置之外,也可以形成一定程度的多层吸附物,或者填塞在孔洞中。当等温线在高处完全转平的时候,溶解物的浓度会随着温度而减少,即在15摄氏度和45摄氏度时,浓度分别为约45mmol L-1至约 30 mmol L-1。在过去的论文中,Fontecha-Cámara 等人 [10] 曾经报导:敌草隆在酸碱度为 7 时,对活性碳纤维和布料的吸附量呈现 L 类等温线;而 Bouras 等人 [9] 则报导敌草隆在酸碱度为 6 时,对于表面活性经过修改的柱状粘土的吸附量呈现S类等温线。因此,多层吸附物的形成,似乎是受到吸附面的性质影响,而另一项影响因素则是酸碱度对已吸附的溶解物和尚待吸附的溶解物之间互动作用的影响。 展开
2013-04-23 21:16:34
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2008-12-11 02:10:44
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- 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
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- 大概范围是多少。。
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478
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