Nailing Down The Hailhead

Doug Kaufman

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Nailing Down The Hailhead

机译：钉住黑头

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Like the Small Block Chevy, the Rocket 88 Olds, the Ford Flathead and the Chrysler Hemi, the Buick Nailhead engine is one of those that has the immortal smell of history all over it. Yet, unlike its more familiar brothers, cousins and even competitors, the Nailhead has an aura of mystery about it as well. The Nailhead had a big-bore, short-stroke design that offered tremendous torque, spread out over a wide RPM range. Introduced in 1953, the overhead valve Buick design incorporated vertical valves (the small size of which gave rise to its somewhat uncomplimentary nickname of "Nailhead") and a pent-roof combustion chamber. With its small valves and tight intake and exhaust ports, Buick used a very interesting camshaft as its stock offering, with higher lift and longer duration. The distributors were in the rear and the starters were on the driver's side, unlike later Buick engines.

机译：像小雪佛兰（Small Block Chevy），火箭88 Olds，福特Flathead和克莱斯勒Hemi一样，别克Nailhead发动机就是其中一种具有不朽历史气息的发动机。然而，与它更熟悉的兄弟，堂兄甚至竞争对手不同，Nailhead对此也充满了神秘色彩。钉头具有大口径，短行程设计，可提供巨大的扭矩，并在很宽的RPM范围内分布。 1953年推出的顶置阀别克设计结合了立式阀（其小尺寸导致了其“钉头”的昵称）和一个顶棚燃烧室。别克凭借较小的气门和狭窄的进气口和排气口，使用了非常有趣的凸轮轴作为备件，具有更高的升程和更长的使用寿命。与后来的别克发动机不同，分配器在后部，起动器在驾驶员侧。

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《Engine Builder》 |2010年第11期|共4页
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Doug Kaufman;
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1. Nailing Down The Hailhead [J] . Doug Kaufman Engine Builder . 2010,第11期

机译：钉住黑头
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7. ABSTRACT Various body parts or organs can be analysed to identify the different diseases in the human body. Fingernail analysis is one of the ways to identify disease in the human body. Nails are the body part which are farthest from the heart and therefore receive oxygen at last. As a result the nails are the first who show the symptoms of a disease in the human body. Fingernails can be easily captured for diagnosis and there are no heavy equipment or no specific conditions required to use nail image for disease diagnosis, like in other tests and scanning processes. Human nails deliver beneficial information about complaints or any nutritive imbalances in the human body depending upon their shape, texture and colour. In human beings, numerous systemic and skin diseases can be easily analyzed through careful examination of nails of both the limbs. A lot of nail illnesses have been found to be primary signs of numerous underlying systemic illnesses. The colour, texture or shape changes in nails are signs of many diseases mainly affecting nails. Considering all these properties of nails a system is proposed that uses digital image processing (DIP) methods for identifying such changes in the human nail to get more precise results and predict numerous diseases effortlessly. With the emerging Internet of Things (IOT) concept the generated report is made available remotely, this will help users to reduce transportation efforts. As the system has to deal with large and private data, the security of data must be ensured. To keep the data confidential, the Blockchain concept which is one of the most emerging concepts in the field of data management is used. The paper contains the implementation of the digital image processing for feature extraction of nail images, usage of IOT (ThingSpeak cloud) for data storage and implementation of Blockchain to keep the system secured and theft free. KEY WORDS: Int ernet of thin gs (IOT), Image proc essin g, Thin gSpeak, RG B vavalues, Mean pi xel vavalues, Bloc kchain , Hash key. Disease Diagnostic System: Abnormalities in Human Nail [O] . Pranav S. Wazarkar 2020

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8. A Comparison of Hand Nailed, Machine Nailed, and Airgun Nailed Pallet Joints [R] . Reeves, J. R. 1979

机译：手钉，机钉和气枪钉托盘接头的比较

Nailing Down The Hailhead

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