Adaptable Material Coding Method for Product Lifecycle Management

Accurate material data shared in product lifecycle is the basis of manufacturing industry informationization. But material coding rule is usually different in enterprises. The code rule definition model based on code segment unit was proposed, and the segment unit was divided into four types as flow, selection, input and conversion according to code generating way. The concept of code segment structure tree was proposed to support the code method’s adaptability. The E-R model of adaptable coding system was described. The integration model of coding system, CAD, CAPP, PDM and ERP was put forward. Based on the model, generating code before design, generating code after design and generating code offline modes were proposed. Taking a specific material code rule in an enterprise as an example, the coding system’s application method was studied. The example shows that the proposed coding method is adaptable and effective.

Pleural Mesothelioma Surveillance: Validity of Cases from a Tumour Registry

BACKGROUND: Pleural mesothelioma is a rare tumour associated with exposure to asbestos fibres. Fewer than than one-quarter of cases registered in the Quebec Tumour Registry (QTR) have been compensated as work-related. While establishing a surveillance system, this led to questioning as to whether there has been over-registration of cases that are not authentic pleural mesotheliomas in the QTR.OBJECTIVE: To assess whether registered cases of pleural mesothelioma could be confirmed.METHODS: A medical chart review was designed to assess the proportion of mesothelioma cases newly registered in the QTR in 2001/2002 that could be confirmed. For each registered case, clinical, medical imaging and pathology information were sought and, occasionally, additional immunohistochemistry staining was obtained. Three specialists – a chest physician, a radiologist and a pathologist – reviewed the available information and material, coding each mesothelioma case as to degree of certainty of the mesothelioma diagnosis.RESULTS: The QTR reported 190 incident cases of mesothelioma (81% males) for the period. The specialists classified 81% of charts as ‘certain/probable’or ‘possible’ mesotheliomas, 8% as ‘unlikely to be a mesothelioma’ and 11% as ‘not a mesothelioma’. After excluding chart summaries of unsatisfactory quality, 87% to 88% of the charts were classified as ‘certain/probable’ or ‘possible’ mesotheliomas, and 9% to 11% were still considered ‘not a mesothelioma’.CONCLUSION: Tumour registry data are a valid source of information for mesothelioma surveillance. While there is some over-registration of mesothelioma cases in the QTR, a significant majority of registered cases appeared to be authentic. Over-registration cannot explain the greater proportion of cases that were not compensated.

Study on the Dynamic Model for Deep Hard Rock near the Blasting Cavity

Basing on the LS-DYNA9703D’s user’s material coding platform, the user-subroutine is coded, and simulates the dynamic behaviors of the coupled-charge rock caused by the spherical charge blasting when the rock mass is surrounded by high confining pressure. The simulated results and related experimental results are compared. The results show that the modified C.C.Grigorian model agrees with the similar test and is suitable for the calculations on the cavity surrounded by high confining pressure, and swelling of the blasting cavity is significantly restricted and relative cavity’s radius and ratio of rock mass’s strength and confining pressure is nearly linear.