Tianjin Beijiang Power Plant, one of the first series of Circular Economy Demonstration Project in the country, successfully put its second unit into operation on November 30, 2009
The 200 MW thermal power unit of Yaugzonghai Reconstruction Project phase I was commissioned and put into system operation on 17th November 1996, it is the first 200 MW thermal unit in operation in Yunnan Province.
The Karachi Port of Pakistan is a deep natural sea port with a history of 150 years. The Port has an 11 km long approach channel decaracted with buoys for proriding safe navigation of 75,000 DWT tankers,modern contain...The Karachi Port of Pakistan is a deep natural sea port with a history of 150 years. The Port has an 11 km long approach channel decaracted with buoys for proriding safe navigation of 75,000 DWT tankers,modern container vessels,bulk Karachi Port is the premier port of Pakistan and handles over 85 percent of the whole dry gen-展开更多
The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the ...The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the electron beam from the Linac and increases its energy to the value required for the storage ring.The full-energy beam could be injected to the storage ring directly or after“high-energy accumulation.”On November 17,2023,the key booster parameters successfully reached their corresponding target values.These milestone results were achieved based on numerous contributions,including nearly a decade of physical design,years of equipment development and installation,and months of beam commissioning.As measured at the extraction energy of 6 GeV,the averaged beam current and emittance reached 8.57 mA with 5 bunches and 30.37 nm rad with a single-bunch charge of 5.58 nC,compared with the corresponding target values of 6.6 mA and 35 nm rad,respectively.This paper presents the physical design,equipment development,installation,and commissioning process of the HEPS booster.展开更多
BACKGROUND Accreditation processes are extensively employed to guarantee the quality of higher education institutions.However,this process can potentially generate a stressful atmosphere for staff,thus impacting their...BACKGROUND Accreditation processes are extensively employed to guarantee the quality of higher education institutions.However,this process can potentially generate a stressful atmosphere for staff,thus impacting their ability to perform optimally under pressure.AIM To examine the knowledge of the National Commission for Academic Assessment and Accreditation(NCAAA)and its effects on perceived stress among dental college staff before and after the program accreditation process.METHODS The present cross-sectional questionnaire-based study included 300 employees from three dental colleges.The same employees had to fill out the questionnaire 1 mo after the NCAAA process.RESULTS Approximately 51.33%of the included employees believed that NCAAA is essential to attract quality students to join the program before and after the program.A total of 44.67%felt that their stress was high before,and 31.33%had low stress levels before and after NCAAA.These findings were statistically significant(P≤0.05).CONCLUSION NCAAA raised the prestige of the institution and specific programmes and increased prospects to attract better students,staff,and money,according to the employees.In addition to their needed teaching,research,and other service responsibilities,this work requires a tremendous amount of faculty effort and may cause them stress.展开更多
A 3W1 superconducting wiggler(SCW)with the pole gap of 68 mm was successfully tested and installed in a BEPC II storage ring in November,2019.The goal of zero liquid helium consumption was achieved,and the cryogenic s...A 3W1 superconducting wiggler(SCW)with the pole gap of 68 mm was successfully tested and installed in a BEPC II storage ring in November,2019.The goal of zero liquid helium consumption was achieved,and the cryogenic system exhibited a 12%residual cooling capacity(approximately 0.69 W@4.2 K).The 3W1-SCW was set to operate at 2.49 T and has been operating for more than seven months.Three instances of magnet quenching occurred during the normal operation.The evaporated helium gas can be recycled to the helium gas recycling system when the pressure in the helium tank is higher than the parameter value(the setpoint of the pressure value is 1.2 bara).The cryogenic system can be recovered within 4 h if sufficient liquid helium is available to inject into the cryostat.展开更多
China’s longest deep-water oil and gas pipeline enters commissioning phase.On June 24,2023,a long-distance submarine pipeline of 20 inches in diameter,as a crucial control project of the second phase of the“Deep Sea...China’s longest deep-water oil and gas pipeline enters commissioning phase.On June 24,2023,a long-distance submarine pipeline of 20 inches in diameter,as a crucial control project of the second phase of the“Deep Sea No.1”ultra-deepwater gas field,entered its commissioning phase.It will be connected to the subsea production system,laying a foundation for the full-line operation of the pipeline.The pipeline was completed on June 22,with a total length of 115.5 kilometers and made up of 9,425 sections of steel pipe.As the longest deep-water oil and gas pipeline in China,it will serve as the main conduit for transporting oil and gas for the second phase of the“Deep Sea No.1”project.展开更多
文摘Tianjin Beijiang Power Plant, one of the first series of Circular Economy Demonstration Project in the country, successfully put its second unit into operation on November 30, 2009
文摘The 200 MW thermal power unit of Yaugzonghai Reconstruction Project phase I was commissioned and put into system operation on 17th November 1996, it is the first 200 MW thermal unit in operation in Yunnan Province.
文摘The Karachi Port of Pakistan is a deep natural sea port with a history of 150 years. The Port has an 11 km long approach channel decaracted with buoys for proriding safe navigation of 75,000 DWT tankers,modern container vessels,bulk Karachi Port is the premier port of Pakistan and handles over 85 percent of the whole dry gen-
基金This work was supported by the National Natural Science Foundation of China(No.12005239).
文摘The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the electron beam from the Linac and increases its energy to the value required for the storage ring.The full-energy beam could be injected to the storage ring directly or after“high-energy accumulation.”On November 17,2023,the key booster parameters successfully reached their corresponding target values.These milestone results were achieved based on numerous contributions,including nearly a decade of physical design,years of equipment development and installation,and months of beam commissioning.As measured at the extraction energy of 6 GeV,the averaged beam current and emittance reached 8.57 mA with 5 bunches and 30.37 nm rad with a single-bunch charge of 5.58 nC,compared with the corresponding target values of 6.6 mA and 35 nm rad,respectively.This paper presents the physical design,equipment development,installation,and commissioning process of the HEPS booster.
文摘BACKGROUND Accreditation processes are extensively employed to guarantee the quality of higher education institutions.However,this process can potentially generate a stressful atmosphere for staff,thus impacting their ability to perform optimally under pressure.AIM To examine the knowledge of the National Commission for Academic Assessment and Accreditation(NCAAA)and its effects on perceived stress among dental college staff before and after the program accreditation process.METHODS The present cross-sectional questionnaire-based study included 300 employees from three dental colleges.The same employees had to fill out the questionnaire 1 mo after the NCAAA process.RESULTS Approximately 51.33%of the included employees believed that NCAAA is essential to attract quality students to join the program before and after the program.A total of 44.67%felt that their stress was high before,and 31.33%had low stress levels before and after NCAAA.These findings were statistically significant(P≤0.05).CONCLUSION NCAAA raised the prestige of the institution and specific programmes and increased prospects to attract better students,staff,and money,according to the employees.In addition to their needed teaching,research,and other service responsibilities,this work requires a tremendous amount of faculty effort and may cause them stress.
基金supported in part by the High Energy Photon Source Test Facility and the Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences
文摘A 3W1 superconducting wiggler(SCW)with the pole gap of 68 mm was successfully tested and installed in a BEPC II storage ring in November,2019.The goal of zero liquid helium consumption was achieved,and the cryogenic system exhibited a 12%residual cooling capacity(approximately 0.69 W@4.2 K).The 3W1-SCW was set to operate at 2.49 T and has been operating for more than seven months.Three instances of magnet quenching occurred during the normal operation.The evaporated helium gas can be recycled to the helium gas recycling system when the pressure in the helium tank is higher than the parameter value(the setpoint of the pressure value is 1.2 bara).The cryogenic system can be recovered within 4 h if sufficient liquid helium is available to inject into the cryostat.
文摘China’s longest deep-water oil and gas pipeline enters commissioning phase.On June 24,2023,a long-distance submarine pipeline of 20 inches in diameter,as a crucial control project of the second phase of the“Deep Sea No.1”ultra-deepwater gas field,entered its commissioning phase.It will be connected to the subsea production system,laying a foundation for the full-line operation of the pipeline.The pipeline was completed on June 22,with a total length of 115.5 kilometers and made up of 9,425 sections of steel pipe.As the longest deep-water oil and gas pipeline in China,it will serve as the main conduit for transporting oil and gas for the second phase of the“Deep Sea No.1”project.
