http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Songtao Yu (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Hongwei Deng,Songtao Yu,Junren Deng,Bo Ke,Feng Bin 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.5
To gain a further understanding of Freeze-Thaw weathering effect on the damage of sandstone from the perspective of energy analysis, uniaxial static compression tests were conducted on sandstone samples that suffered 0, 20, 60, 100 and 140 freezingthawing cycles. Then total input strain energy, releasable elastic strain energy, dissipated energy and freezing-thawing induced damage of samples under uniaxial static compression tests were calculated and analyzed. In the mean time, the energy absorption of sandstone under dynamic loading tests (SHPB (Split-Hopkinson pressure bar) experiments) were cited and made a contrast with the dissipated energy of samples under uniaxial static compression tests. The results show that the tangent modulus, total input strain energy, releasable elastic strain energy and dissipated energy of samples decrease with Freezing-Thawing cycles go on, while the freezing-thawing induced damage grow with freezing-thawing cycles increase. In term of energy used for destroying rock samples in different test modes, less energy is needed for destroying samples in uniaxial static compression tests and it decreases with F-T cycles increase, while more energy is needed for destroying samples in dynamic impact loading and it increases with F-T cycles increase. In addition, the number of fragments of broken sample increase with the F-T cycles both in uniaxial static compression tests and dynamic loading tests, and sample under dynamic loading tests is more broken than sample under uniaxial static compression tests.
-
Control System Design of Anti-rolling Tank Swing Bench Using BP Neural Network PID Based on LabVIEW
Lihua Liang,Mingxiao Sun,Songtao Zhang,Yu Wen,Peng Zhao,Jia Yuan 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.6
The anti-rolling tank swing bench is a typical hydraulic position servo system. Its function is to simulate the ship roll motion and to verify the performance of the anti-rolling tank. Generally, the PID control method can achieve an ideal control effect. But the uncertainties, such as the couplings and the nonlinearty of the swing bench, make it difficult to establish the precise mathematical model of system. During experiments, the different disturbance torques are generated according to the different dimension scales of the anti-rolling tanks. Changes of the natural characteristics of the system are caused by changes of load, and the fixed parameters of PID controller are difficult to continue to ensure a good control effect. In order to reduce the influences caused by the factors mentioned above, a BP neural network PID control system based on virtual instrument LabVIEW is designed. By simulating the responses of the system in real time control, the verification tests using actual system are avoided. Finally, the experiments of swing bench are carried out. The results show that the controller can ensure the control accuracy and stability. The parameters tuning process efficiency is improved. The operation is convenient. The data acquisition process is simple and practical.
-
Assembly of the Superconducting Tokamak EAST
Weiyue Wu,Daming Gao,Jie Yu,Peide Weng,Songtao Wu 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
EAST is a new machine, Experimental Advanced Superconducting Tokamak, being built in CASIPP. Steady-state operation is a main mission for this machine and the superconducting magnets were all poloidal field and toroidal field systems, constituting an engineering mission to establish the technology basis of chosen to be full superconducting Tokamak to investigate a future fusion device. The parameters of EAST are: the main radius is 1.7 m and the minor radius is 0.4 m, with a maximum toroidal magnetic field of 3.5 Tesla at the plasma center. The plasma current is 1 MA, the pulse length is 1000 s, elongation is about 1.6 . 2.0, and triangularity is about 0.4 . 0.6. The EAST device has a large number of components to be assembled at the main building since June 18, 2003. These include: support structure, cryostat, thermal shields, vacuum vessel, toroidal field magnets, poloidal field magnets, current leads and joints, cooling tubes and insulators, first wall and other auxiliary systems. In this device the required assembly should maintain gaps and insulation blocks between toroidal field magnets, thermal shields and vacuum vessel. It was required to meet the tolerances for accurate positioning of the components in the radial, toroidal, poloidal and vertical directions, to ensure that the machine satisfied the requirements and to minimize subsequent corrective operations. This paper presents a brief description of the device in terms of design, fabrication, testing and assembly.
-
Song, Tao,Yu, Wei,Wu, Shi-Xiu Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.1
The outcomes of first-generation EGFR-TKIs (Gefitnib and Erlotinib) have shown great advantages over traditional treatment strategies in patients with non-small cell lung cancer (NSCLC), but unfortunately we have to face the situation that most patients still fail to respond in the long term despite initially good control. Up to now, the mechanism of acquired resistance to EGFR-TKIs has not been fully clarified. Herein, we sought to compile the available clinical reports in the hope to better understanding the subsequent treatment choices, particularly on whether restoring after a drug holiday or switching to another EGFR-TKI is the better option after failure of one kind of EGFR-TKI.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
