In advanced nuclear fuel design, the outer strap of a spacer grid plays an important role on fuel assembly mechanical and thermal-hydraulic performance, e.g., precluding the risk of hang-up and improvement on the mixi...In advanced nuclear fuel design, the outer strap of a spacer grid plays an important role on fuel assembly mechanical and thermal-hydraulic performance, e.g., precluding the risk of hang-up and improvement on the mixing of the coolant. The communication of the outer strap affects the hydraulic force exerted by the spacer grid of the fuel assembly which could induce fuel assembly bow. In present study, in order to understand the influencing factors of hydraulic force exerted by the spacer grid, outer straps with various flow opening design features, different location and size are investigated by a commercially CFD （computational fluid dynamics） code, ANSYS CFX 12.1. Three dimensional rod bundles including the outer strap without and with different openings are modelled for simulation. The analysis results show that the openings on the spacer grid outer strap can reduce the lateral hydraulic loadings perpendicular to the centerline of the fuel rods exerted by the spacer grids obviously because of the pressures inside and outside the spacer grids being balanced. Besides, influences of the opening design features on the hydraulic force, resistance characteristics and lateral flow factor are investigated in details.展开更多
Based on the concept of sustainable design,we are committed to seeking innovative solutions and designinga complete express packaging recycling machine.The device consists of a vibration device,a compression device,a ...Based on the concept of sustainable design,we are committed to seeking innovative solutions and designinga complete express packaging recycling machine.The device consists of a vibration device,a compression device,a winding device and an electronic control system to promote the recycling of resources and environmental protection.This device can further improve the recycling efficiency and feasibility.It provides new ideas and solutions for the express industry and promotes the development of sustainable design in the field of express packaging recycling and reuse devices.展开更多
N1-methyladenosine(m1A)is an important RNA modification that functions in various biological processes by interacting with cellular proteins.However,the binding proteins of N1-methyldeoxyadenosine(1mdA)in DNA remain l...N1-methyladenosine(m1A)is an important RNA modification that functions in various biological processes by interacting with cellular proteins.However,the binding proteins of N1-methyldeoxyadenosine(1mdA)in DNA remain largely unknown.Herein,we employed a quantitative proteomics strategy to identify the potential binding proteins of 1mdA in human cells.Our results revealed that serine–threonine kinase receptor-associated protein(STRAP)can bind to 1mdA-carrying DNA.We further demonstrated that STRAP participates in alkylating agent-induced DNA damage response and can promote the repair of 1mdA embedded in DNA.Moreover,we investigated the effects of STRAP on 1mdA-induced perturbation in transcription using a shuttle vector-and next-generation sequencing-based assay,and found that STRAP is involved in the transcriptional bypass of 1mdA in human cells.Together,our study revealed STRAP as a novel 1mdA-binding protein in human cells and provided new insight into the biological implications of STRAP and 1mdA modification in human diseases.展开更多
The laser gyro is most su it able for building the strap down inertial navigation system (SINS), and its acc uracy of attitude algorithm can enormously affect that of the laser SINS. This p aper develops three improv...The laser gyro is most su it able for building the strap down inertial navigation system (SINS), and its acc uracy of attitude algorithm can enormously affect that of the laser SINS. This p aper develops three improved algorithmal expressions for strap down attitude ut ilizing the angular increment output by the laser gyro from the last two and cur rent updating periods according to the number of gyro samples, and analyses the algorithm error in the classical coning motion. Compared with the conventional algorithms, simulational results show that this improved algorithm has higher precision. A new way to improve the rotation vector algorithms is provided.展开更多
A new loop and fold wave-guide ion cyclotron resonance frequency （ICRF） antenna with a power output of 3 MW, which can operate at a frequency in the range of 30 MHz to 110 MHz, was designed. The design of key compon...A new loop and fold wave-guide ion cyclotron resonance frequency （ICRF） antenna with a power output of 3 MW, which can operate at a frequency in the range of 30 MHz to 110 MHz, was designed. The design of key components of the new ICRF antenna and the charac- ters of the new,.]~rototype ICRF antenna are presented. The thermo-mechanical analysis of both the Faraday shield and the current straps was conducted, and the stresses due to heat loads are studied in detail with different cooling-water velocities considered. In addition, the movability of prototype ICRF antenna under vacuum condition by the driving system was tested. An engineer- ing commissioning was successfully performed on the prototype ICRF antenna using the original transmitter. The results are close to the expected.展开更多
该研究首次在一项降压临床试验中同时测量24h动态肱动脉压和中心动脉压的昼夜节律变化情况[通过安装在类似手表装置带子上的血压计(a tonometer mounted into the articulating strap of a wristwatch-like device,BPro)]。入选"...该研究首次在一项降压临床试验中同时测量24h动态肱动脉压和中心动脉压的昼夜节律变化情况[通过安装在类似手表装置带子上的血压计(a tonometer mounted into the articulating strap of a wristwatch-like device,BPro)]。入选"阿利吉仑降压疗效研究"(ASSERTIVE)的亚组研究"动态中心动脉压研究"(AmCAP)中高血压患者171例,随机分为阿利吉伦组(300mg/d)或替米沙坦组(80mg/d)进行12周的降压治疗,记录基线和治疗12周后动态肱动脉压和动态中心动脉压。结果显示,肱动脉压和中心动脉压有典型的昼夜节律模式。与夜间肱动脉压比较,夜间中心动脉压降低幅度较小,脉压增大降低(均P<0.01)。降压治疗后,昼夜节律没有发生变化。结论:肱动脉压和中心动脉压的昼夜节律模式有所不同,都不受降压治疗的影响,但夜间中心动脉压相对较高,表明夜间中心动脉压对疾病预后具有重要临床诊断意义,值得进一步观察研究。展开更多
Paper products such as corrugated paperboards are the most common green packaging materials, which are renewable, sustainable, recyclable and biodegradable. However, the plastic or metal straps used to secure the cart...Paper products such as corrugated paperboards are the most common green packaging materials, which are renewable, sustainable, recyclable and biodegradable. However, the plastic or metal straps used to secure the carton boxes are not so green. At the end of packaging, the carton boxes can be recycled, but the plastic/metal straps have to be sorted out for disposal separately. This review focuses on: 1) the global trend of green packaging;2) conventional plastic/metal strapping materials for carton boxes;3) conventional market pulp baling with steel wire as the tying materials;4) cellulose fiber-based materials for strapping market pulp bales and carton boxes. New generation of cellulose paper straps are being developed for more challenging applications with superior strength properties and repulpability.展开更多
The LM-3C/Yuanzheng 1 launch vehicle lifted off from the Xichang Satellite Launch Center at 21:52 Beijing time on March 30,2015,putting China’s 17th Bei Dou satellite into orbit.At 03:34 on March 31,the satellite det...The LM-3C/Yuanzheng 1 launch vehicle lifted off from the Xichang Satellite Launch Center at 21:52 Beijing time on March 30,2015,putting China’s 17th Bei Dou satellite into orbit.At 03:34 on March 31,the satellite detached from the Yuanzheng 1 upper stage and entered its working orbit directly,marking the success of China’s first launch mission in year 2015.The China Academy of Launch展开更多
THE Curtain of the stage wasin the manner of a hugetraditional Chinese painting,recounting some long-forgotten tra-gedy with its bright colors and vividstrokes.When the curtain lifted,agorgeous bridal sedan chair, acc...THE Curtain of the stage wasin the manner of a hugetraditional Chinese painting,recounting some long-forgotten tra-gedy with its bright colors and vividstrokes.When the curtain lifted,agorgeous bridal sedan chair, accom-panied by a procession bedeckedwith flags,was carried onto thestage to the accompaniment of fire-crackers,drums and gongs.The fairand docile Liu Siniang was about tobe betrothed to the brave and strap-ping Fu Xiang.展开更多
文摘In advanced nuclear fuel design, the outer strap of a spacer grid plays an important role on fuel assembly mechanical and thermal-hydraulic performance, e.g., precluding the risk of hang-up and improvement on the mixing of the coolant. The communication of the outer strap affects the hydraulic force exerted by the spacer grid of the fuel assembly which could induce fuel assembly bow. In present study, in order to understand the influencing factors of hydraulic force exerted by the spacer grid, outer straps with various flow opening design features, different location and size are investigated by a commercially CFD （computational fluid dynamics） code, ANSYS CFX 12.1. Three dimensional rod bundles including the outer strap without and with different openings are modelled for simulation. The analysis results show that the openings on the spacer grid outer strap can reduce the lateral hydraulic loadings perpendicular to the centerline of the fuel rods exerted by the spacer grids obviously because of the pressures inside and outside the spacer grids being balanced. Besides, influences of the opening design features on the hydraulic force, resistance characteristics and lateral flow factor are investigated in details.
基金Yingkou Institute of Technology school level scientificresearch project(Grant:ZDIL202302).
文摘Based on the concept of sustainable design,we are committed to seeking innovative solutions and designinga complete express packaging recycling machine.The device consists of a vibration device,a compression device,a winding device and an electronic control system to promote the recycling of resources and environmental protection.This device can further improve the recycling efficiency and feasibility.It provides new ideas and solutions for the express industry and promotes the development of sustainable design in the field of express packaging recycling and reuse devices.
基金supported by the National Natural Science Foundation of China(Nos.21907028 and 21807030)Natural Science Foundation of Hunan Province(No.2023JJ30119)+1 种基金the Science and Technology Innovation Program of Hunan Province(No.2019RS2020)the Fundamental Research Funds for the Central Universities(Nos.531118010061 and 531118010259)。
文摘N1-methyladenosine(m1A)is an important RNA modification that functions in various biological processes by interacting with cellular proteins.However,the binding proteins of N1-methyldeoxyadenosine(1mdA)in DNA remain largely unknown.Herein,we employed a quantitative proteomics strategy to identify the potential binding proteins of 1mdA in human cells.Our results revealed that serine–threonine kinase receptor-associated protein(STRAP)can bind to 1mdA-carrying DNA.We further demonstrated that STRAP participates in alkylating agent-induced DNA damage response and can promote the repair of 1mdA embedded in DNA.Moreover,we investigated the effects of STRAP on 1mdA-induced perturbation in transcription using a shuttle vector-and next-generation sequencing-based assay,and found that STRAP is involved in the transcriptional bypass of 1mdA in human cells.Together,our study revealed STRAP as a novel 1mdA-binding protein in human cells and provided new insight into the biological implications of STRAP and 1mdA modification in human diseases.
文摘The laser gyro is most su it able for building the strap down inertial navigation system (SINS), and its acc uracy of attitude algorithm can enormously affect that of the laser SINS. This p aper develops three improved algorithmal expressions for strap down attitude ut ilizing the angular increment output by the laser gyro from the last two and cur rent updating periods according to the number of gyro samples, and analyses the algorithm error in the classical coning motion. Compared with the conventional algorithms, simulational results show that this improved algorithm has higher precision. A new way to improve the rotation vector algorithms is provided.
文摘A new loop and fold wave-guide ion cyclotron resonance frequency （ICRF） antenna with a power output of 3 MW, which can operate at a frequency in the range of 30 MHz to 110 MHz, was designed. The design of key components of the new ICRF antenna and the charac- ters of the new,.]~rototype ICRF antenna are presented. The thermo-mechanical analysis of both the Faraday shield and the current straps was conducted, and the stresses due to heat loads are studied in detail with different cooling-water velocities considered. In addition, the movability of prototype ICRF antenna under vacuum condition by the driving system was tested. An engineer- ing commissioning was successfully performed on the prototype ICRF antenna using the original transmitter. The results are close to the expected.
文摘该研究首次在一项降压临床试验中同时测量24h动态肱动脉压和中心动脉压的昼夜节律变化情况[通过安装在类似手表装置带子上的血压计(a tonometer mounted into the articulating strap of a wristwatch-like device,BPro)]。入选"阿利吉仑降压疗效研究"(ASSERTIVE)的亚组研究"动态中心动脉压研究"(AmCAP)中高血压患者171例,随机分为阿利吉伦组(300mg/d)或替米沙坦组(80mg/d)进行12周的降压治疗,记录基线和治疗12周后动态肱动脉压和动态中心动脉压。结果显示,肱动脉压和中心动脉压有典型的昼夜节律模式。与夜间肱动脉压比较,夜间中心动脉压降低幅度较小,脉压增大降低(均P<0.01)。降压治疗后,昼夜节律没有发生变化。结论:肱动脉压和中心动脉压的昼夜节律模式有所不同,都不受降压治疗的影响,但夜间中心动脉压相对较高,表明夜间中心动脉压对疾病预后具有重要临床诊断意义,值得进一步观察研究。
文摘Paper products such as corrugated paperboards are the most common green packaging materials, which are renewable, sustainable, recyclable and biodegradable. However, the plastic or metal straps used to secure the carton boxes are not so green. At the end of packaging, the carton boxes can be recycled, but the plastic/metal straps have to be sorted out for disposal separately. This review focuses on: 1) the global trend of green packaging;2) conventional plastic/metal strapping materials for carton boxes;3) conventional market pulp baling with steel wire as the tying materials;4) cellulose fiber-based materials for strapping market pulp bales and carton boxes. New generation of cellulose paper straps are being developed for more challenging applications with superior strength properties and repulpability.
文摘The LM-3C/Yuanzheng 1 launch vehicle lifted off from the Xichang Satellite Launch Center at 21:52 Beijing time on March 30,2015,putting China’s 17th Bei Dou satellite into orbit.At 03:34 on March 31,the satellite detached from the Yuanzheng 1 upper stage and entered its working orbit directly,marking the success of China’s first launch mission in year 2015.The China Academy of Launch
文摘THE Curtain of the stage wasin the manner of a hugetraditional Chinese painting,recounting some long-forgotten tra-gedy with its bright colors and vividstrokes.When the curtain lifted,agorgeous bridal sedan chair, accom-panied by a procession bedeckedwith flags,was carried onto thestage to the accompaniment of fire-crackers,drums and gongs.The fairand docile Liu Siniang was about tobe betrothed to the brave and strap-ping Fu Xiang.
