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| 1 | Research on acoustic holography method for identification of sound sources显示文摘This paper presents the method named acoustic holography which can be used to identify noise sources. A new formula of holography reconstruction is obtained, based on the Kirchhoff integral formula. Some simulating tests are carried out using the new formula. The comparison with other reconstruction formulas proves that the new formula is more effective. By using acoustic holography method, some interesting results about the noise of a vehicle are shown. The results proves that acoustic holography is an effective method for the identification of the complex noise sources. | YANG Diange ZHENG Sifa LI Yukang LIAN Xiaomin JIANG Xiaoyu(Automotive Engineering Department, Tsinghua University Beijing 100084)(State Key Laboratory of Automotive Safety and Energy Beijing 100084)Received Dec. 12, 2000 | 2002 | Chinese Journal of Acoustics2002，21，4： | 2 |
| 2 | Acoustic performance prediction of Helmholtz resonator with conical neck显示文摘There is no accurate analytical approach for the acoustic performance prediction of Helmholtz resonator with conical neck,which has broad band acoustic attenuation performance in the low frequency range.To predict the acoustic performance of the resonator accurately,a general theory model based on the one-dimensional analysis approach with acoustic length corrections is developed.The segmentation method is used to calculate the acoustic parameters for sound propagation in conical tubes.And then,an approximate formula is deduced to give accurate correction lengths for conical tubes with difierent geometries.The deviations of the resonance frequency between the transmission loss results obtained by the general theory with acoustic lengths correction and the results from the finite element method and experiments are less than 2 Hz,which is much better than the results from one-dimensional approach without corrections.The results show that the method of acoustic length correction for the conical neck greatly improved the accuracy of the one-dimensional analysis approach,and it will be quick and accurate to predict the sound attenuation property of Helmholtz resonator with conical neck. | LIU Haitao ZHENG Sifa LIAN Xiaomin DAN Jiabi | 2014 | Chinese Journal of Acoustics2014，33，4： | 2 |
| 3 | mtDNA Diversity,Population Structure,and Conservation Genetics of Four Native Carps within the Yangtze River,China显示文摘 | Lu Guoqing Li Sifa Bernatchez L | 1997 | Can J Fish Aqua Sci1997，54，： | 1 |
| 4 | Degradation of trace concentrations of alachlor by medium frequency ultrasound显示文摘 | Rana K Sifa D | 2015 | Chemical Engineering and Processing:Process Intensification2015，89，： | 1 |
| 5 | Genotoxicity of five food preservatives tested on root tips of Allium cepa L显示文摘 | Sifa Türko(g)lu | 2007 | Mutation Research2007，626，12： | 1 |
| 6 | Energy structure and efficiency of a typical Chinese integrated fish farm 显示文摘 | Li Sifa | 1987 | Aquaculture1987，65，： | 1 |
| 7 | Does catheter insertion bynephrologists improve peritoneal dialysis utilization : A multi - center analysis 显示文摘 | A sifA Pflederer TA Vieira CF | 2005 | Semin Dial2005，18，2： | 1 |
| 8 | Technical note:coherenceanalysis of transfer function for dynamic force identifi-cation显示文摘 | Zheng Sifa Zhou Lin | 2011 | Mechanical System and Signal Processing2011，25，6： | 1 |
| 9 | Cold tolerance of three strains of Nile tilapia, Oreochromis niloticus , in China显示文摘 | Li Sifa Li Chenhong Madan Dey Florabelle Gagalac Rex Dunham | 2002 | Aquaculture2002，，1： | 1 |
| 10 | Generation method for a two-dimensional random array for locating noise sources on moving vehicles显示文摘 | Sifa Zheng Feng Xu Xiaomin Lian | 2008 | Noise Control Engineering Journal2008，56，2： | 1 |
| 11 | Preva-lence and predictors of metabolic syndrome among Congolese pre - andpostmenopausal women显示文摘 | MUCHANGA SIFA M J LEPIRA F B’ LONGO A L | 2014 | Climacteric2014，17，4： | 1 |
| 12 | Dietary glutamine supplementation improves growth performance, meat quality, and colour stability of broilers under heat stress 显示文摘 | Dai Sifa Wang Like Wen Aiyou | 2009 | British Poultry Science2009，50，3： | 1 |
| 13 | Effect of intracellular water release on hydro-mechanical behaviors of high kitchen waste content municipal solid waste显示文摘The release of intracellular water during degradation process contributes to the great leachate production and settlement of landfilled high kitchen waste content MSW(HKWC-MSW). An oven-drying and absorbent-paper combined method was proposed to measure the intracellular and interparticle water contents of HKWC-MSW. Two degradation experiments were carried out to study the release process of intracellular water and its effect on the hydro-mechanical behaviors of HKWC-MSW.It was found that the two degradation experiments showed similar degradation behaviors with BOD/COD decreasing with time in the early stage. In the first degradation experiment, most intracellular water was released during the first two months, and the degradation of degradable matter in kitchen waste(KW) was much slower than the release process of intracellular water. The particle size became smaller and the overall grain specific gravity increased during the fast release process of intracellular water.In the second degradation experiment, after two-year degradation, the total leachate production was about 45.2% of the initial wet weight of HKWC-MSW specimen. Water retention capacity θ_f increased from 0.23 to 0.58 during 1–69 d, which might be caused by the decrease of particle size and compression of waste skeleton. As almost all the intracellular water was released after 80-day degradation, during the latter stage of leachate drainage under gravity, θ_f decreased and was close to the total volumetric water content. The total compression strain was about 0.39. The secondary compression strain during 1–80 d(i.e., about 0.07)was considered to be mainly resulted by the release of intracellular water and the subsequent drainage of leachate, and it accounted for about 22.6% of the total secondary compression strain. | XU XiaoBing NI Da CHEN YunMin XU Hui YANG QinFeng XU SiFa | 2019 | Science China(Technological Sciences)2019，62，11： | 1 |
| 14 | Generationmethod for a two-dimensional random array for locatingnoise sources on moving vehicles显示文摘 | ZHENG Sifa XU Feng LIAN Xiaomin | 2008 | Noise controlEngineering Journal2008，56，2： | 1 |
| 15 | Phylogenetic relationships of ornamental carp,Oujiang color carp and Long-fin carp revealed by mitochondrial DNA Collgene sequences and RAPD analysis显示文摘 | Wang Chenghui Li Sifa | 2004 | Aquaculture2004，231，： | 1 |
| 16 | Evaluation on the potentialcapacity of the swan oxbow for the conservation of the major Chinesecarps 显示文摘 | LI Sifa LU Guoqing ZHOU Biyuan | 1995 | Aquaculture1995，137，1： | 1 |
| 17 | Energy structure and efficiency in a typical Chinese integrated fish farm 显示文摘 | Li Sifa | 1987 | Aquaculture1987，65，： | 1 |
| 18 | Experimental study on the stress relaxation properties of a liner sheet显示文摘 | Xu Sifa Imaizumi Shigeyoshi | 2002 | Geosynthetics Engineering Journal2002，17，1： | 1 |
| 19 | Developmental quantitative genetic analysis of body weight and morphological traits in red common carp, Cyprinus carpio L 显示文摘 | Wang Chenghui Li Sifa Liu Zhiguo | 2006 | Aquaculture2006，251，： | 1 |
| 20 | Seinability of four strains of Nile tilapia, Oreochromis niloticus, in Chinese ponds 显示文摘 | Li Sifa Li Chenhong Dey Madan | 1999 | Aquaculture1999，174，： | 1 |
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