Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Chung Woei Chao"'
Publikováno v:
Applied Mechanics and Materials. :2121-2124
As the trend of electronic industry is fast moving towards miniaturization, diversity, high efficiency and high throughput, the devices to be mounted onto a PCB are increasingly densely packed so are the holes needed to keep all elements in place. To
Autor:
Cheng Bang Huo, Chou Wen-Chen, Ying Tung Chen, Kung-Jeng Ma, Chung Woei Chao, Tzung Shian Wu, Choung Lii Chao, Chien Huang Kuo
Publikováno v:
Defect and Diffusion Forum. :808-813
The glass molding process (GMP) is regarded as a very promising technique for mass producing high precision optical components such as spherical/ aspheric glass lenses and free-form optics. However, only a handful of materials can sustain the chemica
Publikováno v:
Advanced Materials Research. :479-484
Owing to the fast development in photonic, telecommunication, and opto-electronic industries, the demand for various micro-lens arrays is rapidly growing. The slow tool servo technique was applied on an ultra-precision diamond turning machine in the
Publikováno v:
Key Engineering Materials. :731-734
Ultrasonic machining (USM) technique has long been used for fabricating various patterns and drilling holes on brittle materials. However, the surfaces generated by USM are normally rather rough and covered by deep penetrated cracks. This has greatly
Autor:
Choung Lii Chao, Chung Woei Chao, Wei Yao Hsu, Chun Chieh Chen, Kung-Jeng Ma, Chia Jong Chang, Kuo Cheng Huang, Hanshan Dong
Publikováno v:
Key Engineering Materials. :601-606
Stainless steel and other ferrous metals are normally classified as not diamond turnable for the unacceptable tool wear caused by the thermal-chemical reaction between diamond and ferrous metals. In the present research, stainless steel specimens wer
Publikováno v:
Key Engineering Materials. 329:391-396
Rotary ultrasonic machining (RUM) is considered to be a very effective and relatively accurate way to drill deep holes in brittle materials. Although brittle fracture (micro chipping) is the dominant material removal mechanism utilized by the RUM pro
Publikováno v:
Materials Science Forum. :367-372
Precise and efficient tool setting technique and accurate tool shape monitoring are of essential importance in ultra-precision diamond turning operation. The traditional way of tool setting are typically laborious, inefficient and rely heavily on exp
Publikováno v:
Signal Processing: Image Communication. 12:1-11
This paper presents a modified block truncation coding (BTC) algorithm for image compression. Similar blocks in an image are merged into a cluster and represented with the cluster center. Each cluster center is then encoded with a vision block trunca
Publikováno v:
SPIE Proceedings.
As the demand for micro-patterned parts getting bigger, the need for molds with micro/nano scaled patterns to duplicate these parts effectively and economically is increasing ever so rapidly. Over the years, numerous attempts have been made to fabric
Publikováno v:
Pattern Recognition Letters. 17:1499-1506
This paper presents a modified block truncation coding scheme for the compression of images. We first design a set of binary edge patterns, which are visually significant, to approximate the bit plane of an image block. An interblock coding scheme, u