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Modelling individual head-related transfer function(HRTF)based on anthropometric parameters and generic HRTF amplitudes

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CAAI Transactions on Intelligence Technology 2023年第2期8卷 364-378页

作者： Rui Zhang Ruijie Meng Jinqiu Sang Yi Hu xiaodong li Chengshi Zheng Key Laboratory of Noise and Vibration Research Institute of AcousticsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina Shanghai Institute of AI for Education East China Normal UniversityShanghaiChina Department of Electrical Engineering and Computer Science University of Wisconsin–MilwaukeeMilwaukeeWisconsinUSA

The head-related transfer function(HRTF)plays a vital role in immersive virtual reality and augmented reality technologies,especially in spatial audio synthesis for binaural *** article proposes a deep learning method with generic HRTF amplitudes and anthropometric parameters as input features for individual HRTF *** designing fully convolutional neural networks,the key anthropometric parameters and the generic HRTF amplitudes were used to predict each individual HRTF amplitude spectrum in the full-space directions,and the interaural time delay(ITD)was predicted by the transformer *** the amplitude prediction model,the attention mechanism was adopted to better capture the relationship of HRTF amplitude spectra at two distinctive directions with large angle differences in ***,with the minimum phase model,the predicted amplitude spectrum and ITDs were used to obtain a set of individual head-related impulse *** the separate training of the HRTF amplitude and ITD generation models,their joint training was also considered and *** root-mean-square error and the log-spectral distortion were selected as objective measurement metrics to evaluate the *** experiments further showed that the auditory source localisation performance of the proposed method was better than other methods in most cases.

关键词： audio databases augmented reality deep learning multimedia

Traditional medicine in India

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Journal of Traditional Chinese Medical Sciences 2021年第S1期8卷 51-55页

作者： Yu Shi Chao Zhang xiaodong li Beijing University of Chinese Medicine Beijing102488China Institute of Chinese Materia Medica Gansu Academy of Traditional Chinese MedicineLanzhou730050China Laboratory of Chinese Medicine Gansu Provincial Hospital of Traditional Chinese MedicineLanzhou730050China

India has a long history of traditional medicine,and Ayurveda is the most representative *** to traditional Chinese medicine,Ayurveda is a life science derived from *** emphasizes that human health requires both personalized medicine and a holistic *** article takes Ayurveda as an example to introduce traditional Indian medicine,hoping to provide readers with a preliminary understanding of the development of traditional medicine in India.

关键词： Traditional Indian medicine Ayurveda Five elements theory Three humoralisms theory

Constructing artificial mimic-enzyme catalysts for carbon dioxide electroreduction

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Science China Chemistry 2022年第1期65卷 106-113页

作者： li li Qidong li xiaodong li Shumin Wang Kai Zheng Ming Zuo Xiaolong Zu Yuan Zhao Wensheng Yan Junfa Zhu Yongfu Sun Yi Xie Hefei National Laboratory for Physical Sciences at Microscale National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China Engineering Laboratory for Next Generation Power and Energy Storage Batteries Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China Laboratory of Advanced Materials School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China

Natural bio-enzyme catalysts usually exhibit unexpected performances for many significant reactions,which are worthy of *** we report artificial metal-sulfur-carbon(M-S-C)mimic-enzyme catalysts based on bionic *** catalysts combine metal centers and functional ligands,which realize the universal fabrication of phase and adjustable *** synthesized catalysts inherit the highly active and selective feature of bio-enzyme *** directly used for carbon dioxide electroreduction reaction,the Sn-S-C catalyst exhibits high selectivity for formate(Faradaic efficiency>95%),as well as a continuous stability over 120 h at a high current density of 740 m A cm^(-2),greatly outperforming the reported catalysts for formate *** catalytic sites and pathways are probed with in-situ Fourier transform infrared(FTIR)spectra,in-situ Raman spectra and synchrotron-radiation X-ray photoelectron *** results break the inherent conundrum that it is impossible to simultaneously realize activity and durability under high *** findings offer a versatile strategy to inherit from nature and integrate different components,thus designing efficient catalysts for various challenging reactions and energy conversions via a natural sustainable way.

关键词： carbon dioxide electroreduction universal synthesis mimic-enzyme catalysts

Preparation and properties of gradient Al_2O_3-ZrO_2 ceramic foam by centrifugal slip casting method

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China Foundry 2012年第4期9卷 337-343页

作者： i Qiang Yu Jingyuan Tang Ji Qi Guochao li xiaodong College of Materials Science and Engineering Liaoning University of TechnologyJinzhou 121001China Shenyang Research Institute of Foundry Shenyang 110022China Key Laboratory for Anisotropy and Texture of Materials Ministry of EducationNortheastern UniversityShenyang 110004China

The aim of the present research is to provide a novel technique for preparing gradient Al 2 O 3-ZrO 2 ceramic *** technique used epispastic polystyrene spheres to array templates and centrifugal slip casting to obtain cell struts with gradient distribution of Al 2 O 3 and ZrO 2 particles and high packing *** Al 2 O 3-20vol.% ZrO 2 slurries with 20vol.% solid contents were prepared and the dispersion and rheological characteristics of the slurries were *** settling velocity and mass segregation of Al 2 O 3 and ZrO 2 particles at different centrifugal accelerations were calculated and *** drying behavior,macrostructure,microstructure,compressive property and resistance to thermal shock of the sintered products were also *** results show that the difference of settling velocity of Al 2 O 3 and ZrO 2 particles increases and mass segregation becomes acute with an increase in centrifugal *** cell struts prepared at a centrifugal acceleration of 1,690 g have high sintered density(99.0% TD) and continuous gradient distribution of Al 2 O 3 and ZrO 2 *** sintered at 1,550 o C for 2 h,the cell size of gradient Al 2 O 3-ZrO 2 foam is approximately uniform,about 1.1 *** the porosity of gradient Al 2 O 3-ZrO 2 ceramic foams increasing from 75.3% to 83.0%,the compressive strength decreases from 4.4 to 2.4 MPa,and the ceramic foams can resist 8-11 repeated thermal shock from 1,100 o C to room temperature.

关键词： ceramic foam centrifugal slip casting settling velocity gradient distribution compressive property

Giant mechanocaloric materials for solid-state cooling

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Chinese Physics B 2020年第7期29卷 172-181页

作者： Junran Zhang Yixuan Xu Shihai An Ying Sun xiaodong li Yanchun li Multidiscipline Research Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Physical Sciences Beihang UniversityBeijing 100191China

This article reviews the research progress of measurement techniques and materials on the mechanocaloric effect over the past few *** materials can be divided into elastocaloric and barocaloric materials depending on the applied uniaxial stress or hydrostatic *** materials include non-magnetic shape memory alloys,polymers,and rare-earth *** materials include magnetic shape memory alloys,ferroelectric ceramics,superionic conductors,and *** mechanocaloric effects of these classes of materials are systematically compared in terms of the isothermal entropy change and adiabatic temperature *** addition to the thermal effects,other characteristics closely related to the application of mechanocaloric materials are also ***,perspectives for further development of mechanocaloric materials in the solid-state cooling area are discussed.

关键词： mechanocaloric materials elastocaloric effect barocaloric effect solid-state cooling

Investigation of structural change of purple membrane in storage by transmission electron microscope and atomic force microscope

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Chinese Science Bulletin 2001年第20期46卷 1753-1756页

作者： li xiaodong li Zongli YAN Jiusheng li Hui HAN Baoshan HU Kunsheng WANG Aojin Center of Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100080China State Key Laboratory of Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100080China Photosynthesis Research Center Institute of BotanyChinese Academy of SciencesBeijing 100093China Institute of Biophysics Chinese Academy of SciencesBeijing 100101China

The structural change of purple membrane during storage has been investigated by means of transmission electron microscope and atomic force microscope. It is found that many liposomes have spontaneously evolved from the purple membrane sheets isolated three years ago. The membrane proteins on the liposomes, bacteriorhodopsin, are still presented as trimers in 2-D hexagonal structure, which is the same as that in natural cell membrane. However, the cytoplasmic surface of purple membrane faced outside on the liposomes.

关键词： transmission electron microscope (TEM) atomic force microscope (AFM) purple membrane (PM) bacteriorhodopsin (BR).

The O and H isotope characteristics of water from major rivers in China

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Chinese Journal Of Geochemistry 2015年第1期34卷 28-37页

作者： Si-liang li Fu-Jun Yue Cong-Qiang liu Hu Ding Zhi-Qi Zhao xiaodong li The State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences

Isotopic compositions of the water sources and evapotranspiration in large rivers of China are not well explored. In this investigation, d18 O and dD values of water from major large rivers of China are integrated to understand the spatial and temporal variations in the isotopes of water and d-excess. River water samples were collected from the channels and tributaries of the Changjiang, Yellow, Songhua and liao Rivers in China. Water from upstream was generally enriched with light isotopes relative to that from downstream areas. Water from the Songhua River and upper reach of the Changjiang River has relatively negative isotopic values impacted by latitude and altitude effects, respectively. The spatial pattern showed that d18O-H2 O values in rivers mainly ranged from-9 to-7 % in most of China based on roughly mapped contours, and rivers enriched in light isotopes were primarily located in the Tibetan Plateau and northeast China The slopes of linear regression from the Yellow and liao Rivers suggested that the loss of water by direct evaporation shifted the isotopes of water, especially in some small tributaries. Additionally, there was a narrow range of low d18OH2 O values from the main channel of rivers during the lowflow season relative to the high-flow season due to influence of the monsoon climate. No distinct spatial variation of d-excess values was found in the rivers of China. However, water samples in some rivers with low d-excess values had high d18 O values, indicating that evaporation in the tributaries has led to significant water loss, especially in tributaries of the Yellow and liao Rivers.

关键词：中国东北地区同位素特征河流水源长江上游蒸发损失同位素组成时空变化

Co-synthesis of vertical graphene nanosheets and high-value gases using inductively coupled plasma enhanced chemical vapor deposition

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Plasma Science and Technology 2018年第12期20卷 86-95页

作者： Jian YANG Ruiyang XU Angjian WU xiaodong li li li Wangjun SHEN Jianhua YAN State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027People's Republic of China Department of Nuclear Engineering University of California at BerkeleyBerkeleyCalifornia 94720United States of America China United Engineering Corporation Hangzhou 310052People's Republic of China

One-step controllable synthesis of vertical graphene nanosheets （VGs） and high-value gases was achieved using inductively coupled plasma enhanced chemical vapor deposition （ICPECVD）. The basic physical properties of the ICPECVD process were revealed via electrical diagnosis and optical emission spectroscopy. The coil current and voltage increased linearly with the augmenting of injected power, and CH, C2, H2 and H were detected at a wavelength from 300 to 700 nm, implying the generation of abundant graphene-building species. The morphology and structure of solid carbon products, graphene nanosheets, were systemically characterized in terms of the variations of operating conditions, such as pressure, temperature, gas proportion, etc. The results indicated that an appropriate operating condition was indispensable for the growth process of graphene nanosheets. In the present work, the optimized result was achieved at the pressure, heating temperature, applied power and gas proportion of 600 mTorr, 800 ~C, 500 W and 20：20：15, respectively, and the augmenting of both CH4 and H2 concentrations had a positive effect on the etching of amorphous carbon. Additionally, H2 and C2 hydrocarbons were detected as the main exhaust gases. The selectivity of H2 and C2H2, measured in exhaust gases, reached up to 52% and 8%, respectively, which implied a process of free radical reactions and electron collision dissociation. Based on a comprehensive investigation of spectral and electrical parameters and synthesized products, the reaction mechanism of collision, dissociation, diffusion, etc, in ICPECVD could be speculated, providing a probable guide for experimental and industrial applications.

关键词： vertical graphene nanosheets gaseous products OES electrical diagnosis ICPECVD

Short-term prediction of the influent quantity time series of wastewater treatment plant based on a chaos neural network model

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Frontiers of Environmental Science & Engineering 2007年第3期1卷 334-338页

作者： li xiaodong ZENG Guangming HUANG Guohe li Jianbing JIANG Ru College of Environmental Science and Engineering Hunan UniversityChangsha 410082China

By predicting influent quantity,a wastewater treatment plant(WWTP)can be well *** non-linear dynamic characteristic of WWTP influent quantity time series was analyzed,with the assumption that the series was *** on this,a short-term forecasting chaos neural network model of WWTP influent quantity was built by phase space *** forecasting results were achieved using this method.

关键词： wastewater treatment plant(WWTP) influent quantity short-term forecasting time series chaos neural network model