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| 1 | 基于改进PNCC特征和两步区分性训练的录音设备识别方法显示文摘录音设备来源识别是通过分析已获取的数字语音信号从而确定其录制设备的一种技术,属于数字音频盲取证.本文提出了一种基于改进PNCC特征和两步区分性训练的录音设备识别方法,由于音频中的静音包含了完整的设备信息,且不受说话人和文本等因素的影响,因此从静音段提取改进的PNCC特征,利用了PNCC的长时帧分析去除背景噪声对设备信息的影响.在模型方面,以GMM-UBM为基准模型,并通过两步区分性训练调整集内设备模型和通用背景模型,提升模型区分能力.该方法对于30种设备闭集识别的平均正确识别率为90.23%;对于15个集内和15个集外设备的测试,等错误率为15.17%,集内平均正确识别率为96.65%,验证了本文算法的有效性. | 贺前华 王志锋 Alexander I Rudnicky 朱铮宇 李新超 | 2014 | 电子学报2014，42，1： | 9 |
| 2 | Normal compression wave scattering by a permeable crack in a fluid-saturated poroelastic solid显示文摘A mathematical formulation is presented for the dynamic stress intensity factor(mode I) of a finite permeable crack subjected to a time-harmonic propagating longitudinal wave in an infinite poroelastic solid. In particular, the effect of the wave-induced fluid flow due to the presence of a liquid-saturated crack on the dynamic stress intensity factor is analyzed. Fourier sine and cosine integral transforms in conjunction with Helmholtz potential theory are used to formulate the mixed boundary-value problem as dual integral equations in the frequency domain. The dual integral equations are reduced to a Fredholm integral equation of the second kind. It is found that the stress intensity factor monotonically decreases with increasing frequency, decreasing the fastest when the crack width and the slow wave wavelength are of the same order. The characteristic frequency at which the stress intensity factor decays the fastest shifts to higher frequency values when the crack width decreases. | Yongjia Song Hengshan Hu John W. Rudnicki | 2017 | Acta Mechanica Sinica2017，33，2： | 2 |
| 3 | Effect of vitamin E and human placenta cysteine peptidase inhibitor on expression of cathepsins B and L in implanted hepatoma Morris 5123 tumor model in Wistar rats显示文摘AIM: To examine the effectiveness of human placental inhibitors, by injecting vitamin E to rats with transplanted Norris-5123 hepatoma, on the expression of cathepsins B and L in tumor, liver, lung and blood sera after transplantation of Norris 5123 hepatoma.METHODS: Animals were divided into 10 groups receiving three different concentrations of vitamin E and inhibitors along or in combination and compared with negative control (healthy rats) and positive control (tumor rats). Effectiveness of treatment was evaluated with regard to survival time,tumor response and determination of the activities of proteolytic enzymes and their inhibitors using flurogenic substrates.RESULTS: Cathepsins B and L activities were elevated by 16-fold in comparison with negative control tissues, and their endogenous inhibitor activity decreased by 1.2-fold before treatment. In several cases, tumors completely disappeared following vitamin E plus human placental cyteine protease inhibitor (CPI) compared with controls.The number of complete tumor responses was higher when 20 m/kg vitamin E plus 400 μg of CPI was used, i.e.7/10 rats survived more than two mo. Cathepsins B and L were expressed significantly in tumor, liver, lung tissues and sera in parallel to the increasing of the endogenous inhibitor activity compared with the controls after treatment (P<0.0001).CONCLUSION: The data indicate formation of metastasis significantly reduced in treated rats, which might provide a therapeutic basis for anti-cancer therapy. | Tadeusz Sebzda Piotr Hanczyc Yousif Saleh Bernice F Akinpelumi Maciej Siewinski Jerzy Rudnicki | 2005 | World Journal of Gastroenterology2005，11，4： | 2 |
| 4 | Meta-analysis of the association of 4 angiotensinogen polymorphisms with essential hypertension : A role beyond M235T? 显示文摘 | Pereira TV Nunes AC Rudnicki M | 2008 | Hypertension2008，51，3： | 1 |
| 5 | Muscle satellite cells are multipotential stem cells that exhibit myogenic, osteogenic, and adipogenic differentiation显示文摘 | Asakura A Komaki M Rudnicki M | 2001 | Differentiation2001，68，45： | 1 |
| 6 | Conditions for the localization of the deformation in pressure sensitive dilatant materials显示文摘 | RUDNICKI J W RICE J R | 1975 | Journal of the Mechanics and Physics of Solids1975，23，： | 1 |
| 7 | Cellular and molecular regulation of muscle regeneration显示文摘 | Charge SB Rudnicki MA | 2004 | Physiol Rev2004，84，1： | 1 |
| 8 | Variability in surface mois- ture content along a hillslope transect : Rattlesnake Hill, Texas 显示文摘 | Famiglietti J S Rudnicki J W Rodell M | 1998 | Journal of Hydrology1998，210，： | 1 |
| 9 | Adding numbers with DNA显示文摘 | Wasiewicz P Mulawka J J Rudnicki W R | 2000 | IEEE International Conference on Systems Man and Cybernetics2000，21，1： | 1 |
| 10 | A new look at the origin,function,and 'stem-cell' status of muscle satellite cells显示文摘 | SEALE P RUDNICKI M A | | 0，，： | 1 |
| 11 | Antioxi- dant and antiglyeation properties of Passiflora alata and Passiflora edulis extracts显示文摘 | Rudnicki M Oliveira M R Pereira T V | 2007 | Food Chemistry2007，100，： | 1 |
| 12 | Forty-eight years of canopy change in a hardwood-hemlock forest in New York City显示文摘 | RUDNICKY J L MCDONNELL M J | 1989 | Bull Torrey Botanical Club1989，116，： | 1 |
| 13 | Conditions for the localization of deformation inpressure-sensitive dilatant materials显示文摘 | Rudnicki J W Rice J R | 1975 | Joumal of the Mechanics and Physics of Solids1975，23，： | 1 |
| 14 | Looking back to the embryo:defining transcriptional network in adult myogenesis显示文摘 | PARKER M H SEALE P RUDNICKI M A | | 0，，04： | 1 |
| 15 | Bearing-only and Doppler- bearing tracking using instrumental variables 显示文摘 | Chan Y T Rudnicki S W | 1992 | IEEE Transactions on Acoustics Speech and Signal Processing1992，28，4： | 1 |
| 16 | Transdifferentiation of esophageal smooth to skeletal muscle is myogenic bHLH factor dependent显示文摘 | Kablar B Tajbakhsh S Rudnicki M A | 2000 | Development2000，127，： | 1 |
| 17 | Variability in surface moisture content along a hillslope transect:Rattlesnake Hill,Texas显示文摘 | Famiglietti J S Rudnicki J W Rodell M | 1998 | Journal of Hydrology1998，210，1234： | 1 |
| 18 | Muscle satellite cells are multipotential stem cells that exhibit myogenic,osteogenic,and adipogenic differentiation显示文摘 | ASAKURA A RUDNICKI M A KOMAKI M | 2001 | Differentiation2001，68，： | 1 |
| 19 | Targeted inactivation of the mouse regulatory gene Myf5 results in abnormal distal rib development and early postnatal death in homozygous mouse mutants显示文摘 | Braun T Rudnicki M A Arnold H H et a l | 1992 | Cell1992，71，3： | 1 |
| 20 | Peptide YY ameliorates ceruleininduced pancreatic injury in the rat显示文摘 | Tito J Rudnicki M Jones D | 1993 | Am J Surg1993，165，3： | 1 |
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