Ventilation fans are one of the most important pieces of equipment in coal mines. Their performance plays an important role in the safety of staff and production. Given the actual requirements of coal mine production,...Ventilation fans are one of the most important pieces of equipment in coal mines. Their performance plays an important role in the safety of staff and production. Given the actual requirements of coal mine production,we instituted a research project on the measurement methods of key performance parameters such as wind pressure,amount of ventilation and power. At the end a virtual instrument for mine ventilation fans performance evaluation was developed using a USB interface. The practical performance and analytical results of our experiments show that it is feasible,reliable and effective to use the proposed instrumentation for mine ventilation performance evaluation.展开更多
Luster is one of the main factors in assessing fabric appearance. There are many different ways to definite and describe the luster, which result in disorder and discommodious in evaluation. Based on previous work, an...Luster is one of the main factors in assessing fabric appearance. There are many different ways to definite and describe the luster, which result in disorder and discommodious in evaluation. Based on previous work, an apparatus suited for the measure of lustre is developed. Which performed measure the reflection distribution of fabrics automatically. Then the objective judgment can be given by the geniophotometric curve. Finally taking several kind of specimens for example give the results to prove the effectiveness of the device.展开更多
基金Project 2007E237 supported by the Science Fund Program of Shaanxi Province of China
文摘Ventilation fans are one of the most important pieces of equipment in coal mines. Their performance plays an important role in the safety of staff and production. Given the actual requirements of coal mine production,we instituted a research project on the measurement methods of key performance parameters such as wind pressure,amount of ventilation and power. At the end a virtual instrument for mine ventilation fans performance evaluation was developed using a USB interface. The practical performance and analytical results of our experiments show that it is feasible,reliable and effective to use the proposed instrumentation for mine ventilation performance evaluation.
文摘Luster is one of the main factors in assessing fabric appearance. There are many different ways to definite and describe the luster, which result in disorder and discommodious in evaluation. Based on previous work, an apparatus suited for the measure of lustre is developed. Which performed measure the reflection distribution of fabrics automatically. Then the objective judgment can be given by the geniophotometric curve. Finally taking several kind of specimens for example give the results to prove the effectiveness of the device.
