Mechanical Engineering Journal最新文献_第3页

Deep encoder and decoder for time-domain speech separation 时域语音分离的深度编码器和解码器

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.23-00124

Kohei TAKAHASHI, Toshihiko SHIRAISHI

{"title":"Deep encoder and decoder for time-domain speech separation","authors":"Kohei TAKAHASHI, Toshihiko SHIRAISHI","doi":"10.1299/mej.23-00124","DOIUrl":"https://doi.org/10.1299/mej.23-00124","url":null,"abstract":"The previous research of speech separation has significantly improved separation performance based on the time-domain method: encoder, separator, and decoder. Most research has focused on revising the architecture of the separator. In contrast, a single 1-D convolution layer and 1-D transposed convolution layer have been used as encoder and decoder, respectively. This study proposes deep encoder and decoder architectures, consisting of stacked 1-D convolution layers, 1-D transposed convolution layers, or residual blocks, for the time-domain speech separation. The intentions of revising them are to improve separation performance and overcome the tradeoff between separation performance and computational cost due to their stride by enhancing their mapping ability. We applied them to Conv-TasNet, the typical model in the time-domain speech separation. Our results indicate that the better separation performance is archived as the number of their layers increases and that changing the number of their layers from 1 to 12 results in more than 1 dB improvement of SI-SDR on WSJ0-2mix. Additionally, it is suggested that the encoder and decoder should be deeper, corresponding to their stride since their task may be more difficult as the stride becomes larger. This study represents the importance of improving these architectures as well as separators.","PeriodicalId":45233,"journal":{"name":"Mechanical Engineering Journal","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135699318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Model experiments on the influence of tunnel hood cross-sectional area on the reduction of the pressure gradient of the compression wavefront in high-speed railways 高速铁路隧道罩截面积对压缩波前压力梯度减小影响的模型试验

IF 0.5

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.22-00155

T. Fukuda, S. Saito

引用次数: 1

Vibration analysis of cylindrical liquid storage tanks that considers excitation phase difference 考虑激励相位差的圆柱形储液罐振动分析

IF 0.5

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.22-00236

M. Utsumi

引用次数: 0

Reduce the sway of the crane payload using on-off damping radial spring-damper 采用开关阻尼径向弹簧阻尼器减小起重机有效载荷的摇摆

IF 0.5

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.22-00321

Kien T. Nguyen, L. Tran

引用次数: 0

Diffuseness quantification in an acoustic test chamber using the isotropy derived by the angular spectrum of sound waves based on the spherical harmonics expansion 基于球面谐波展开的由声波角谱导出的各向同性声学测试室的扩散量化

IF 0.5

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.22-00371

Daichi Todaka, Koki Sato, Hiroshi Nagatomo, S. Ando, Q. Shi

引用次数: 0

Effect of water atomized powder size on the flowability and sintered properties in metal binder jet 3D printing 水雾化粉末粒度对金属粘结剂喷射3D打印流动性和烧结性能的影响

IF 0.5

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.22-00476

Tomochika Takahashi, Yuta Kinai, Toshiko Osada, Satoshi Kobayashi

引用次数: 0

Reduction of welding residual stress using ultrasonic vibration load (Effects of material properties on reduction rate) 超声振动载荷降低焊接残余应力(材料性能对降低率的影响)

IF 0.5

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.23-00056

Takero Hirose, Akira Nakazato, K. Kurita, S. Aoki, S. Koshimizu, Tatsuo Yoshida

引用次数: 0

Very high-cycle fatigue properties of 90° unidirectional CFRP laminates and evaluation of fatigue limits by free volume measurement using positron microscopy 90°单向CFRP层压板的高周疲劳性能及正电子显微镜自由体积测量的疲劳极限评价

IF 0.5

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.23-00089

Masafumi Tazuke, Tsuyoshi Miyakoshi, A. Hosoi, K. Michishio, N. Oshima, H. Kawada

引用次数: 0

Numerical studies for defect topology identification based on the adjoint variable and the finite element methods 基于伴随变量法和有限元法的缺陷拓扑识别数值研究

IF 0.5

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.23-00090

T. Kurahashi, K. Takeuchi, Towa Koike, M. Kishida, Y. Murakami, F. Ikeda

引用次数: 0

Markerless motion capture of hands and fingers in high-speed throwing task and its accuracy verification 高速投掷动作中手和手指的无标记动作捕捉及其准确性验证

Mechanical Engineering Journal Pub Date : 2023-01-01 DOI: 10.1299/mej.23-00220

Ayane KUSAFUKA, Naoki TSUKAMOTO, Kohei MIYATA, Kazutoshi KUDO

{"title":"Markerless motion capture of hands and fingers in high-speed throwing task and its accuracy verification","authors":"Ayane KUSAFUKA, Naoki TSUKAMOTO, Kohei MIYATA, Kazutoshi KUDO","doi":"10.1299/mej.23-00220","DOIUrl":"https://doi.org/10.1299/mej.23-00220","url":null,"abstract":"In human motion capture systems, reflective markers attached to the body have been widely used to track motion using optical cameras. However, when the speed of motion increases, because the brightness and angle of view of the camera are limited, and the markers often fall off, particularly of detailed body parts such as fingers in full-body movements, other parts of the body (palms) have been investigated. This study attempted to acquire finger movements during a high-speed throwing task without attaching markers using automatic image recognition technology based on deep learning (DeepLabCut) and verified its accuracy compared to conventional methods. As a result, the absolute distance between the 3D coordinates obtained from the two motion capture systems was an average of 15.5 to 29.4 mm depending on tracked points, and the correlation coefficients between them ranged from 0.932 to 0.999. Therefore, the shapes of the time-series profiles of the 3D coordinates obtained from the two motion- capture systems were similar. These results suggest that motion measurement using markerless motion capture is possible in environments where conventional motion capture systems are difficult to use.","PeriodicalId":45233,"journal":{"name":"Mechanical Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135705468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0