|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Mitigating self-excited flame pulsating and thermoacoustic oscillations using perforated liners显示文摘Open-loop control of self-excited flame pulsating oscillations and thermo-acoustic instability is considered in this work.The performance of the control strategy is numerically evaluated in a 2 D Rij ke-type combustor with a perfo rated pipe implemented.It is found that approximately 38 dB sound pressure level(SPL)reduction can be achieved by actively tuning the cooling flow through the perforated pipe.Furthermore,the vorticity-induced damping performance is contributing to the breaking up of flame-acoustics coupling.However,the shedding of vortices is not uniformly distributed along the perforated pipe.To apply the control strategy in practice and to validate the findings,experimental studies are performed on a customerdesigned Rij ke-type combustor with a perfo rated liner implemented.To mimic practical engines,a cooling flow generated by a centrifugal pump is provided to pass through the perforated pipe.Properly tuning the cooling flow rate is found to lead to the unstable combustor being successfully stabilized.SPL is red uced by approximately 35 dB at ω1/2π≈245 Hz,and harmonic thermoacoustic modes are completely attenuating.Further study is conducted by suddenly re moving the perforated pipe section.The combustion system is found to be associated with not only classical thermo-acoustic limit cycle oscillations with a dominant mode at 2.45 × 102 Hz,but also beating oscillations at 1.4 × 1 00 Hz.It is revealed that increasing acoustic losses by implementing the perforated pipe is another critical mechanism contributing to attenuating flame pulsating instability.The present work opens up an applicable means to attenuate both selfexcited high-frequency thermoacoustic and low-frequency flame pulsating oscillations. | Dan Zhao Ephraim Gutmark Arne Reinecke | 2019 | Science Bulletin2019，64，13： | 3 |
| 2 | Valproic acid and nonalcoholic fatty liver disease: A possible association?显示文摘Valproic acid(VPA) is one of the most prescribed drugs in children with newly diagnosed epilepsy. Weight gain and obesity have been observed as side effects of VPA. These are often linked with other metabolic disturbances such as development of insulin resistance, dyslipidemia, metabolic syndrome(Met S) and nonalcoholic fatty liver disease or nonalcoholic fatty liver disease(NAFLD). NAFLD refers to a group of liver disorders with marked hepatic steatosis. It is associated with an increased incidence of cardiovascular diseases and overall reduced life expectancy. NAFLD occurs in 20%-25% of the general population and it is known to be the most common cause of chronic liver disease. NAFLD therefore represents a major public health issue worldwide. This study reviews and summarizes relevant literature that supports the existence of an association between VPA therapy and the development of NAFLD in children. Long-term VPA-therapy appears to be associated with an increased risk of developing NAFLD. Further studies are needed to clarify the pathogenic mechanisms that lie behind this association and to standardize the options for the use of this drug in overweight patients and in those with risks for developing Met S and NAFLD. | Edoardo Farinelli David Giampaoli Anja Cenciarini Ephraim Cercado Alberto Verrotti | 2015 | World Journal of Hepatology2015，7，9： | 3 |
| 3 | Speech enhancement using a minimum mean-square error short-time spectral amplitude estimator 显示文摘 | Ephraim Y Malah D | 1984 | IEEE Transactions on Acoustics Speech Signal Processing1984，32，6： | 2 |
| 4 | Tonsillectomy vs. partial tonsillectomy for OSAS in children—10 years post-surgery follow-up显示文摘 | Ephraim Eviatar Alexander Kessler Nathan Shlamkovitch Michael Vaiman Drorit Zilber Haim Gavriel | 2008 | International Journal of Pediatric Otorhinolaryngology2008，，5： | 2 |
| 5 | Eupergit C, a carrier for immobilization of enzymes of industrial protein显示文摘 | Ephraim Katchalski-Katzir Dieter M Kraemer | 2000 | J Mol Cat B: Enzymic2000，10，： | 2 |
| 6 | Speech enhancement using a minimum mean-square error short-time log-spectral am- plitude estimator显示文摘 | Ephraim Y Malah D | 1985 | IEEE Transactions on Acoustics Speech and Signal Processing1985，33，2： | 1 |
| 7 | A signal subspace approach for speech enhancement显示文摘 | Ephraim Y Trees H L | 1995 | IEEE Trans on Speech Audio Processing1995，3，4： | 1 |
| 8 | On Second-order Statistics and Linear Estimation of Cepstral Coefficients显示文摘 | Ephraim Y Rahim M | 1999 | IEEE Transactions on Speech and Audio1999，7，2： | 1 |
| 9 | A signal subspace approach for speech enhancement 显示文摘 | Ephraim Y Trees H L V | 1995 | IEEE Trans on Speech and Audio Processing1995，3，7： | 1 |
| 10 | A Bayesian estimation approach for speech en- hancement using hidden Markov models显示文摘 | Ephraim Y | 1992 | IEEE Transactious on Signal Processing1992，40，4： | 1 |
| 11 | Speech enhancement using a minimum-mean square error short-time spectral amplitude estimator 显示文摘 | Ephraim Y Malah D | 1984 | Acoustics Speech and Signal Processing IEEE Transactions on1984，32，6： | 1 |
| 12 | Gain-adapted hidden Markov models for recogni- tion of clean and noisy speech显示文摘 | Ephraim Y | 1992 | IEEE Transactions on Signal Processing1992，40，6： | 1 |
| 13 | A Bayesian approach to robust adaptive beamforming显示文摘 | Bell K L Ephraim Y Van Trees H L | 2000 | IEEE Trans Signal Processing2000，48，2： | 1 |
| 14 | Simple questionnaire and urine reagent strips compared to microscopy for the diagnosis of Schistosoma haematobium in a community in northern Ghana 显示文摘 | BOGOCH I I ANDREWS J R DADZIE EPHRAIM R K | 2012 | Trop Med Int Health2012，17，10： | 1 |
| 15 | Phantom pain,residual limb pain,and back pain in amputees:results of a national survey显示文摘 | Ephraim PL Wegener ST Mackenzie EJ | | 0，，10： | 1 |
| 16 | Punica granatum (pomegranate)and its potential for prevention and treatment of inflammation and cancer显示文摘 | Ephraim P Lansky Robert A Newman | 2007 | Journal of Ethnopharmacology2007，109，2： | 1 |
| 17 | Speech enhancement using a minimummean square error short-time spectral amplitude estimator 显示文摘 | Ephraim Y Malah D | 1984 | IEEE Trans Audio Speech Lang Process1984，32，6： | 1 |
| 18 | Speech enhancement using a minimum mean-square error short-time spectral amplitude estimator显示文摘 | Ephraim Y Malah D | 1984 | IEEE Trans Acoust Speech Signal Processing1984，32，： | 1 |
| 19 | Hidden Markov processes显示文摘 | Yariv Ephraim Neri Merhav | 2002 | IEEE Trans Infor Theory2002，48，6： | 1 |
| 20 | Speech enhancement using a minimum mean-square error short-time spectral amplitude estimator 显示文摘 | EPHRAIM Y MALAH D | 1984 | IEEE Trans Acoust Speech Signal Process1984，32，6： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员