立式压力容器吊装时轴耳的应力分析

针对吊装时未充分考虑设备本体强度的大型立式容器,设计人员经常采用现场加设轴耳的方式来满足吊装要求.本文利用有限元软件ANSYS对轴耳及筒体进行建模、网格划分、加载、求解、后处理等过程,并分别对卧式吊装和立式吊装工况下的轴耳及周围简体受力情况进行重点分析和强度校核,结果表明:轴耳均满足卧式吊装和立式吊装工况下的安全要求.     

夹心猪耳的加工工艺

采用现代食品加工方法,以海带和猪耳朵为主要原料,配以盐、酱油、料酒和香辛料等辅料,利用猪耳朵和海带胶质含量丰富,胶质中的胶原蛋白热分解后具有胶凝性,冷却后又会凝固成富有弹性的凝胶这一特性,把猪耳朵和海带先煮熟浸味以后,叠成多层包装,从而研制出一种风味良好、营养丰富且食用方便的新型软罐头食品.     

基于三维人耳形变模型的三维人耳重建

基于对已有三维人耳重建工作和形变模型理论的研究,充分结合人耳自身的结构特征,提出了一种新的三维人耳重建方法——基于人耳形变模型的方法.首先使用中垂线法完成了外耳轮廓特征点的定位;提出分级三角网格法,解决了样本耳基于生理特征的稠密对应问题;再借鉴广义普鲁克分析的思想,在三维空间内实现了精确全自动的三维人耳形状对齐;最后训练得到了三维人耳形变模型.所提方法只需一幅二维图像,即可获得足够稠密的三维人耳模型.在UND三维人耳数据库和USTB三维重建人耳数据库上的大量实验证明所提方法的有效性和优越性.     

压差及电耳在钢球磨中的应用

煤位的控制是双进双出钢球磨煤机自动化控制的重要一环。煤位控制原理就是对磨煤机筒体内煤位高度进行连续测量,并将测得煤位信号与设定值比较处理后反馈至给煤机,从而达到控制给煤速度的目的。并将压差和电耳在实际应用中,对其各自特点及适用范围作了详细说明。     

宣钢SAE系列美标盘条表面结疤原因分析及生产控制

论述了宣钢二钢轧厂在生产各规格SAE系列线材盘圆时发生的表面结疤等质量缺陷的情况,通过电镜扫描等手段对结疤物质组分进行分析,并通过低倍、截取12架次的中间坯等方法对结疤的产生进行了分析,得出宜钢线材的结疤主要原因是轧制过程中产生的耳子及折叠造成,从而采用了措施加以避免。     

罐笼胶轮罐耳的改进

通过对胶轮罐耳的改造 ,提高了利用组合罐道运行的容器的可靠性 ,提高了经济效益     

铝材料打造现代汽车的新潮流

根据现代轿车的追求轻量化，日益广泛使用铝材，已经成为一种趋势。介绍了全铝合金发动机、汽车铝合金配件、全铝车身等，并指出提高抗承载能力和再利用率是铝舍金零部件的重要课题。     

乳酸菌接种量对发酵猪耳西式火腿品质的影响

以猪耳为原料经乳酸菌发酵加工西式火腿，探讨了在发酵猪耳西式火腿加工过程中乳酸菌接种量对产品的物性（包括硬度、弹性、咀嚼性、凝聚性、粘着性和脆性）、出品率、pH值以及感官品质的影响。结果表明：以保加利亚乳杆菌（Lactobacillus bulgaricus）和植物乳杆菌（Lactobacillus plantarum）按l：l的比例组合。发酵24h计，乳酸菌接种量为15％（菌种培养液体积：浸泡液体积×100）时，产品可获得较为理想的酸度和感官评分，而乳酸菌接种量对产品的物性和出品率没有明显规律性影响。     

乳熟期鲜食玉米穗不同部位碳水化合物的变化

对乳熟期鲜食玉米穗不同部位碳水化合物的变化研究表明，籽粒中可溶性总糖（TSC）质量分数为先增加后降低，蔗糖（SUC）和TSC的变化趋势相似，淀粉质量分数逐渐增加，可溶性酸性蔗糖转化酶的活性先增加后降低．穗轴中SUC及TSC质量分数在授粉后任何时期总是高于籽粒，淀粉质量分数远低于籽粒．苞皮中TSC与SUC质量分数缓慢减少，在籽粒灌浆初期积累有大量的TSC，为籽粒迅速灌浆做出了贡献，淀粉质量分数远低于穗轴．鲜食玉米采收后应低温放置或及时加工，以抑制糖快速转化为淀粉，防止鲜食玉米品质下降．     

The structure and function of auditory chordotonal organs in insects

Insects are capable of detecting a broad range of acoustic signals transmitted through air, water, or solids. Auditory sensory organs are morphologically diverse with respect to their body location, accessory structures, and number of sensilla, but remarkably uniform in that most are innervated by chordotonal organs. Chordotonal organs are structurally complex Type I mechanoreceptors that are distributed throughout the insect body and function to detect a wide range of mechanical stimuli, from gross motor movements to air-borne sounds. At present, little is known about how chordotonal organs in general function to convert mechanical stimuli to nerve impulses, and our limited understanding of this process represents one of the major challenges to the study of insect auditory systems today. This report reviews the literature on chordotonal organs innervating insect ears, with the broad intention of uncovering some common structural specializations of peripheral auditory systems, and identifying new avenues for research. A general overview of chordotonal organ ultrastructure is presented, followed by a summary of the current theories on mechanical coupling and transduction in monodynal, mononematic, Type 1 scolopidia, which characteristically innervate insect ears. Auditory organs of different insect taxa are reviewed, focusing primarily on tympanal organs, and with some consideration to Johnston's and subgenual organs. It is widely accepted that insect hearing organs evolved from pre-existing proprioceptive chordotonal organs. In addition to certain non-neural adaptations for hearing, such as tracheal expansion and cuticular thinning, the chordotonal organs themselves may have intrinsic specializations for sound reception and transduction, and these are discussed. In the future, an integrated approach, using traditional anatomical and physiological techniques in combination with new methodologies in immunohistochemistry, genetics, and biophysics, will assist in refining hypotheses on how chordotonal organs function, and, ultimately, lead to new insights into the peripheral mechanisms underlying hearing in insects.