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pressure的相关文献在1983年到2022年内共计743篇,主要集中在肿瘤学、内科学、金属学与金属工艺 等领域,其中期刊论文742篇、会议论文1篇、相关期刊216种,包括中国科学、中国有色金属学会会刊:英文版、金属学报:英文版等; 相关会议1种,包括第六届中国国际压铸会议等;pressure的相关文献由2484位作者贡献,包括Kazumitsu Nawata、Moriyo Kimura、Jean Marie Ntaganda等。

pressure—发文量

期刊论文>

论文:742 占比:99.87%

会议论文>

论文:1 占比:0.13%

总计:743篇

pressure—发文趋势图

pressure

-研究学者

  • Kazumitsu Nawata
  • Moriyo Kimura
  • Jean Marie Ntaganda
  • Soheil Sharifi
  • Wei Wang
  • 王宏伟
  • Aiqun Liu
  • Akiyoshi Kuji
  • Ayako Ohashi
  • Benjamin Mampassi

pressure

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    • Paul-Darlington Ibemezie Ndubuisi; Innocent Ifeanyi Eneh; Anthony Chidolue Nnaji
    • 摘要: Inlet and outlet orifices in an actuation chamber are sources through which the supply and exhaust pressures pass during the actuation process in clutch systems. They are key ingredients in an actuation chamber and are very phenomenal in heavy-duty vehicle operation. It is these pressures that initiate linear or rotary motions in drive systems. The pressure actions are processed in an enclosure termed an actuation chamber. Oftentimes, the forces or pressures produced in an actuation chamber are unknown and immeasurable owing to a lack of precise instruments to accomplish them. This challenge can only be approached via an improvised technique that requires experimentation. This is precisely what this presentation is all about. The knowledge of these parameters is important in the study of the actuation process in electro-pneumatic clutch systems of heavy-duty vehicles. The study was done with a Mercedes Benz Actros Truck Model MP 2, 2031 Actuator chamber. An empirical and analytical approach was adopted. Meter rule, Venire Callipers and Mass Spring Balance were deployed for the experiments. Piston coil or spring, clutch distance in the actuator, the cross-sectional diameter of the actuator, and displacement in the free lengths of the coils among others were measured. The results of the experiments were analysed and used to determine the values of the supply (inlet) and exhaust (outlet) pressures which results stood at 9.61 bars and 11.299 bars, respectively.
    • Chen Ke
    • 摘要: At a July 15 press conference,China’s National Bureau of Statistics(NBS)released data on the country’s economic performance in the first half of this year showing that China’s gross domestic product(GDP)expanded 2.5 percent year on year to 56.26 trillion yuan(US$8.65 trillion).GDP growth in Q2 was 29.25 trillion yuan(US$4.50 trillion),up 0.4 percent year on year.The Chinese economy secured positive growth in Q1 and Q2 despite downward pressure.
    • Bin Yan
    • 摘要: Machine learning is the use of computers to learn the intrinsic laws and information contained in data through algorithms to gain new experience and knowledge,in order to improve the intelligence of computers,so that they can make decisions similar to those made by humans when faced with problems.With the development of various industries,the amount of data has increased and the efficiency of data processing and analysis has become more demanding,a series of machine learning algorithms have emerged.Machine learning algorithms are essentially steps and processes that apply a large number of statistical principles to solve optimisation problems.Appropriate machine learning algorithms can be used to solve practical problems more efficiently for a wide range of model requirements.This paper presents the interim state of a dynamic disruption management software solution for logistics,using machine learning methods to study the extent to which stress is predicted based on physiological and subjective parameters,to prevent physical and mental stress on workers in the logistics industry,to maintain their health,to make them more optimistic and better able to adapt to their work,and to facilitate more accurate deployment of human resources by companies according to the real-time requirements of the logistics industry.
    • Hualei Sun; Cuiqun Chen; Yusheng Hou; Weiliang Wang; Yu Gong; Mengwu Huo; Lisi Li; Jia Yu; Wanping Cai; Naitian Liu; Ruqian Wu; Dao-Xin Yao; Meng Wang
    • 摘要: We report a comprehensive high-pressure study,up to 21.1 GPa,on the antiferromagnetic topological insulator EuSn2As2 achieved through synchrotron X-ray diffraction,Raman scattering,electrical resistance,magnetic resistance,and Hall transport measurements in combination with first-principles calculations.The Néel temperatures determined from resistance are increased from(24±1)to(77±8)K under pressure,which is a result of enhanced magnetic exchange couplings between Eu2+ions yielded by our first-principles calculations.The negative magnetoresistance of EuSn2As2 persists to higher temperatures accordingly.However,the enhancement of the observed Néel temperatures deviates from the calculations above 10.0 GPa.In addition,the magnitude of the magnetoresistance,Hall coefficients,and charge carrier densities show abrupt changes between 6.9 and 10.0 GPa.The abrupt changes likely originate from a pressure-induced valence change of Eu ions from a divalent state to a divalent and trivalent mixed state or are related to the structural transition revealed by Raman scattering measurements.Our results provide insight into magnetism variation in EuSn2As2 and similar antiferromagnetic topological insulators under pressure.
    • Lihui Ma; Limin He; Xiaoming Luo; Xiangran Mi
    • 摘要: Dedicated experiments and numerical simulations have been conducted to investigate the splitting characteristics of a gas-liquid two phase flow at a T junction.The experiments were carried out for different gas-liquid velocities.The flow rates in the two branches were measured accurately to determine how the two considered phases distribute in the two outlets.The experimental results have shown that when the two outlet pressures are asymmetric,the two-phase flow always tends to flow into the outlet which has a lower pressure.As the inlet liquid velocity increases,however,the two-phase flow gradually tends to split evenly.Compared with the experiment results,the pressure difference between the two outlets can be determined more accurately by means of numerical simulation.The trends of experimental results and simulations are in very good agreement.
    • Anqiang Sun; Chengcheng Zhao; Zujie Gao; Xiaoyan Deng; Hancheng Qiu
    • 摘要: Flow diverter intervention is a cutting-edge treatment for intracranial aneurysms by altering the flow field and reducing the pressure in the aneurysm sac.However,the rupture rate and complications rate are still high.In this study,a new design of flow diverter based on Bernoulli’s equation was proposed and hemodynamics evaluation of it was conducted.The numerical model of a patient specific internal carotid aneurysm was established based on computed tomography scan images(Model C).The aneurysm models with normal diverter(ND)and local stenosed diverter(LSD)were modified from the patient-specific model.The blood flow characteristics were obtained and analyzed by numerical simulation while the in vitro experiments were conducted using three-dimensional printed silicone models and pressure measurement system.In both ND and LSD models,the blood flow into the aneurysm have been significantly blocked by the diverters and the pressure in the aneurysm sac have been decreased.The pressure drop and the wall shear stress on the aneurysm wall in the LSD model are higher than that in the ND model.The oscillatory shear index and relative residence time in the aneurysm wall of LSD are lower than that in the ND model.The pressure measurement in the vitro experiment also qualitatively verified the results of pressure comparison in the numerical simulation.In conclusion,the simulation results and in vitro experiments verified that diverter can certainly reduce the pressure in the aneurysm,and the newly design diverter with local stenosis can strengthening this effect.
    • 霍翔宇; 陈传光(指导)
    • 摘要: Pressure is a serious problem in today’s world.Students in our class are under so much pressure.Some students can’t get on with their classmates;others may worry about their exams.I’m always under pressure,too.My parents want me to be the top student in class.So they send me to all kinds of after-school classes at weekends.Last Monday evening,I had a talk with my mother.I told her I was not lazy.I really felt tired.I needed time to relax.My mother agreed with me at last.
    • 周越
    • 摘要: After lunch,Rick and Mary were waiting for Uncle George.He had promised to see them and to talk with them in the den as soon as he had finished a phone call.They wanted to learn more about the weather.
    • Chinh C. Tran; Thi D. Ta; An T. Duong; Oanh T. K. Phan; Dung A. Nguyen
    • 摘要: Air quality is one of key issues to be addressed in the Vietnam environmental security strategy. As part of the strategy, this study investigates the temporal patterns of PM2.5 variations in Hanoi using data measured from January 2017 to December 2018. The loglinear regression is used to analyze how the meteorological factors affect the PM2.5 variations. The analysis indicates the seasonal, monthly and diurnal variations of PM2.5 concentrations. The lowest concentration level is found in the summer due to hot climatic conditions with strong winds and high solar radiation. The highest PM2.5 concentration is observed in winter as a result of stagnation. The concentration levels from 2:00 AM to 8:00 AM tend to be higher than other hours of the day while the downtrend is recorded from 11:00 AM to 7:00 PM and reaches the lowest levels of the day at 2:00 PM to 3:00 PM. The study results provide important information for government authorities, international and civil society organizations on when and why the PM2.5 concentration levels increase. This predictive analysis would be useful to develop early warning systems and to minimize the negative impacts of air pollution on public health.
    • 刘讲军; 曲桢; 胡钢
    • 摘要: In this paper,we investigate the regularity criterion via the pressure of weak solutions to the micropolar fluid equations in three dimensions.We obtain that for 0<α<1 if p€L^(2/a)(0,T;B^α∞,∞),then the weak solution(u,ω)is regular on(0,T).
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