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Kbd Conditions - One of the best experts on this subject based on the ideXlab platform.
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the summary of national surveillance on kashinbeck disease kbd Prevailing Condition in 1998
CHINESE JOURANL OF CNDEMIOLOGY, 1998Co-Authors: Kbd ConditionsAbstract:In 1990,We began to monitor KashinBeck Disease (KBD) Condition in nationwide KBD area.It has been nine years that the national KBD surveillance had been developed up to now.The features of the surveillance are as the follows:The selected monitoring spots were rationally distributed in nationwide KBD area;Radiograph of right hand was taken as the mark of this disease,which was very sensitive and accurate;Radiographs of all surveillance spots were collectively read in a meeting on May of every year,and in the meantime statistical analysis was completed.The surveillance has accumulated a vast amount of valuable data.National KBD Condition since 1990,for the most part,has showed a tendency to decline in varying degrees,but in certain places we found new,active and serious KBD districts,such as Yulin county in Shaanxi province,and therefore we must maintain sharp vigilance of KBD.In 1998,positive detectable rate(%) of radiographs of right hands of children aged 7 ̄12 is 3.8,1.1 and 8.9 at Aba,Wangcang and Hanyuan county in Sichuan province;0 and 2.1 at Tianshui and Qingyang county in Gansu province;4.6,5.4,31.6 and 33.3 at Linyou,Lingtong and two places of Yulin county in Shaanxi province;0 and 0 at Xiaxian and Jixian county in Shanxi province;1.4 at Luoning county in Henal province;0 at Fengning county in Hebei province;14.0 and 5.9 at Wushenqi and Moqi county in the Inner Mongolia Autonomous Region;1.0 and 0.9 at Jiaohe and Dunhua in Jilin province;0 and 6.5 at Linkou and Fuyu county in Heilongjiang province;31.6 and 19.0 at Xinghai and Guide in Qinghai province,respectively.
Kbd Condition - One of the best experts on this subject based on the ideXlab platform.
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summary of national surveillance on kashin beck disease kbd Prevailing Condition for 10 years 1990 1999
CHINESE JOURANL OF CNDEMIOLOGY, 1999Co-Authors: Kbd ConditionAbstract:Objective The KBD prevalence monitor,beginning from 1990 until now,proceeded for 10 years already,so that it is a necessary thing to summarize them in some detailed form.Methods The data collected in monitoring period,was written in reports for every one of the 10 yeas,and published in magazines timely;the reports were summarized and analyzed in this paper and named as “the summary report for ten year monitor for KBD”.Results ①The correct theory and practice experiences were adopted in the KBD monitoring program,when it has been built up.②Many sided supports of competent authorities of health ministry,from manpower founds and policies aspects etc,and the active participation of endemic provinces were key factors for the completion of this program.③The discussion,analysis and prognosis of KBD epidemiologic specialties were proceded with the help of detail data and deep analysis taken from the ten year monitoring surveillance.④It was found that in north east and north parts of China,the X ray positive detectable rates were all lower than 10%,nearing to the controlled level of KBD prevalence;now active and serious points were found in Qinghai,Shanxi provinces only,in which X ray positive detectable rats were in range of 30%~40%,even exceed of 60% in a specific point.⑤The implement of agriculture revolution in all country,with which the sanitary quality of cereals has been elevated significantly,introduced the stable and decreasing trend of KBD prevalence,and no any local technical methods can be comparable with it.Conclusions Ten year monitors were very successful,and presented a great quantity of usefulness information,very favorable to the preparation of KBD preventive program. [
Marc Arthur Masen - One of the best experts on this subject based on the ideXlab platform.
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Abrasive wear based predictive maintenance for systems operating in sandy Conditions
Wear, 2015Co-Authors: M. Woldman, Evert Van Der Heide, Tiedo Tinga, Marc Arthur MasenAbstract:Machines operating in sandy environments are damaged by the abrasive action of sand particles that enter the machine and become entrapped between components and contacting surfaces. In the case of the military services the combination of a sandy environment and the wide range of tasks to be fulfilled results in extreme and uncertain operating Conditions. All of this hinders the ability to establish efficient maintenance strategies prior to deployment and increases the risk of mechanical failure. To prevent such problems, it would be desirable to perform maintenance based on the Prevailing Condition of both the components and the environment. By monitoring the loading situation as well as the characteristics of the sand particles, the wear of components is quantified, allowing maintenance to be performed when necessary. The development and implementation of such a predictive maintenance concept requires knowledge of the operational and environmental Conditions and how they relate to the principal wear mechanisms. Based on previously established relationships between the abrasive particles and the resulting abrasive wear, the current work focuses on the implementation of these results into a predictive maintenance concept for vehicles that operate in a sandy environment. For this, the local parameters that govern the wear mechanism, such as the normal forces and sliding distances need to be linked to machine usage parameters including the type of terrain and the driving distance. The proposed concept is demonstrated using a case study on the sprockets of a military vehicle, where the sprockets wear progressively during use of the vehicle due to the abrasive action of sand. The predictive maintenance concept is shown to support the determination of maintenance intervals under a range of usage profiles and sand varieties.
M. Woldman - One of the best experts on this subject based on the ideXlab platform.
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Abrasive wear based predictive maintenance for systems operating in sandy Conditions
Wear, 2015Co-Authors: M. Woldman, Evert Van Der Heide, Tiedo Tinga, Marc Arthur MasenAbstract:Machines operating in sandy environments are damaged by the abrasive action of sand particles that enter the machine and become entrapped between components and contacting surfaces. In the case of the military services the combination of a sandy environment and the wide range of tasks to be fulfilled results in extreme and uncertain operating Conditions. All of this hinders the ability to establish efficient maintenance strategies prior to deployment and increases the risk of mechanical failure. To prevent such problems, it would be desirable to perform maintenance based on the Prevailing Condition of both the components and the environment. By monitoring the loading situation as well as the characteristics of the sand particles, the wear of components is quantified, allowing maintenance to be performed when necessary. The development and implementation of such a predictive maintenance concept requires knowledge of the operational and environmental Conditions and how they relate to the principal wear mechanisms. Based on previously established relationships between the abrasive particles and the resulting abrasive wear, the current work focuses on the implementation of these results into a predictive maintenance concept for vehicles that operate in a sandy environment. For this, the local parameters that govern the wear mechanism, such as the normal forces and sliding distances need to be linked to machine usage parameters including the type of terrain and the driving distance. The proposed concept is demonstrated using a case study on the sprockets of a military vehicle, where the sprockets wear progressively during use of the vehicle due to the abrasive action of sand. The predictive maintenance concept is shown to support the determination of maintenance intervals under a range of usage profiles and sand varieties.
Tiedo Tinga - One of the best experts on this subject based on the ideXlab platform.
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Abrasive wear based predictive maintenance for systems operating in sandy Conditions
Wear, 2015Co-Authors: M. Woldman, Evert Van Der Heide, Tiedo Tinga, Marc Arthur MasenAbstract:Machines operating in sandy environments are damaged by the abrasive action of sand particles that enter the machine and become entrapped between components and contacting surfaces. In the case of the military services the combination of a sandy environment and the wide range of tasks to be fulfilled results in extreme and uncertain operating Conditions. All of this hinders the ability to establish efficient maintenance strategies prior to deployment and increases the risk of mechanical failure. To prevent such problems, it would be desirable to perform maintenance based on the Prevailing Condition of both the components and the environment. By monitoring the loading situation as well as the characteristics of the sand particles, the wear of components is quantified, allowing maintenance to be performed when necessary. The development and implementation of such a predictive maintenance concept requires knowledge of the operational and environmental Conditions and how they relate to the principal wear mechanisms. Based on previously established relationships between the abrasive particles and the resulting abrasive wear, the current work focuses on the implementation of these results into a predictive maintenance concept for vehicles that operate in a sandy environment. For this, the local parameters that govern the wear mechanism, such as the normal forces and sliding distances need to be linked to machine usage parameters including the type of terrain and the driving distance. The proposed concept is demonstrated using a case study on the sprockets of a military vehicle, where the sprockets wear progressively during use of the vehicle due to the abrasive action of sand. The predictive maintenance concept is shown to support the determination of maintenance intervals under a range of usage profiles and sand varieties.