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| 1 | Molecular dynamics study on the relationships of modeling,structural and energy properties with sensitivity for RDX-based PBXs显示文摘In this paper,a primary model is established for MD(molecular dynamics) simulation for the PBXs(polymer-bonded explosives) with RDX(cyclotrimethylene trinitramine) as base explosive and PS as polymer binder.A series of results from the MD simulation are compared between two PBX models,which are represented by PBX1 and PBX2,respectively,including one PS molecular chain having 46 repeating units and two PS molecular chains with each having 23 repeating units.It has been found that their structural,interaction energy and mechanical properties are basically consistent between the two models.A systematic MD study for the PBX2 is performed under NPT conditions at five different temperatures,i.e.,195 K,245 K,295 K,345 K,and 395 K.We have found that with the temperature increase,the maximum bond length(L max) of RDX N N trigger bond increases,and the interaction energy(E N-N) between two N atoms of the N-N trigger bond and the cohesive energy density(CED) decrease.These phenomena agree with the experimental fact that the PBX becomes more sensitive as the temperature increases.Therefore,we propose to use the maximum bond length L max of the trigger bond of the easily decomposed and exploded component and the interaction energy E N-N of the two relevant atoms as theoretical criteria to judge or predict the relative degree of heat and impact sensitivity for the energetic composites such as PBXs and solid propellants. | XIAO JiJun ZHAO Li ZHU Wei CHEN Jun JI GuangFu ZHAO Feng WU Qiang XIAO HeMing | 2012 | Science China Chemistry2012，55，12： | 12 |
| 2 | Speech endpoint detection in low-SNRs environment based on perception spectrogram structure boundary parameter显示文摘The Perception Spectrogram Structure Boundary(PSSB)parameter is proposed for speech endpoint detection as a preprocess of speech or speaker recognition.At first a hearing perception speech enhancement is carried out.Then the two-dimensional enhancement is performed upon the sound spectrogram according to the difference between the determinacy distribution characteristic of speech and the random distribution characteristic of noise.Finally a decision for endpoint was made by the PSSB parameter.Experimental results show that,in a low SNR environment from-10 dB to 10 dB,the algorithm proposed in this paper may achieve higher accuracy than the extant endpoint detection algorithms.The detection accuracy of 75.2%can be reached even in the extremely low SNR at-10 dB.Therefore it is suitable for speech endpoint detection in low-SNRs environment. | WU Di ZHAO Heming HUANG Chengwei XIAO Zhongzhe ZHANG Xiaojun XU Yishen TAO Zhi | 2014 | Chinese Journal of Acoustics2014，33，4： | 8 |
| 3 | Revisiting the late Permian coal from the Huayinshang, Sichuan, southwestern China: Enrichment and occurrence modes of minerals and trace elements显示文摘 | Shifeng Dai Yangbing Luo Vladimir V. Seredin Colin R. Ward James C. Hower Lei Zhao Shande Liu Cunliang Zhao Heming Tian Jianhua Zou | 2013 | International Journal of Coal Geology2013，，： | 3 |
| 4 | Research on mold flux for hypo-peritectic steel at high casting speed显示文摘Mold fluxes having adaptable properties were developed in the laboratory to solve quality defects, such as depressions and longitudinal cracks when casting hypo-peritectic steel at high casting speed. Firstly, the effect of components on the high basicity mold flux properties was first studied using the orthogonal method. In the scope of the studied content, Li2O has the largest effect on the melting temperature, and the least effect on the viscosity; CaF2 has the largest effect on the viscosity, and the least effect on the melting temperature; Na2O and CaO/SiO2 have no obvious influence on the melting temperature and viscosity. Secondly, two powders (Z1 and Z6) have reasonable viscosity-temperature curves, higher solidification temperatures, and porous structure after solidification, but the crystal property of Z6 is worse than that of Z1, and thus Z1 is more suitable for continuous casting hypo-peritectic steel at high casting speed. Thirdly, a higher basicity of powder, a less free enthalpy of crystal compound, and a lower baffle energy are good for a higher tendentiousness of crystal. | Heming Zhao Xinhua Wang Jiongming Zhang | 2007 | Journal of University of Science and Technology Beijing2007，14，3： | 2 |
| 5 | Heterogeneous Microstructure-Induced Mechanical Responses in Various Sub-Zones of EH420 Shipbuilding Steel Welded Joint Under High Heat Input Electro-Gas Welding显示文摘Heterogeneous microstructure-induced mechanical responses in EH420 shipbuilding steel welded joint by electro-gas welding processed have been systematically studied by scanning electron microscopy,electron backscatter diffraction and mechanical testing.Comparing with the coarse-grained heat-affected zone(CGHAZ),the weld metal presents higher toughness(129.3 J vs.37.3 J)as it contains a large number of acicular ferrites with high-angle grain boundaries(frequency 79.2%)and special grain boundary∑3(frequency 55.3%).Moreover,coarse austenite grains in CGHAZ and slender martensite–austenite constituents between bainite laths may likely facilitate crack propagation.Polygonal ferrites and tempered pearlites formed at the junction of the fine-grained heat-affected zone and the intercritical heat-affected zone induced a softened zone with an average hardness of 185 HV0.5,which is the main reason for the occurrence of tensile fracture. | Xu Xie Tan Zhao Heming Zhao Song Li Cong Wang | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，10： | 2 |
| 6 | Preparation of nitrogen doped clews-like carbon materials and their application as the electrode in supercapacitor显示文摘In this work, nitrogen doped clews-like carbon materials were successfully fabricated through hydrothermal polymerization method, followed by post treatment that integrated the carbonization,activation and post-nitrogen doping into one process. This preparation method can form particular hierarchical porous structure without using any sacrificial templates. The experimental results show that the nitrogen doped clews-like hierarchical porous carbon materials possess a relatively high specific surface area of 815 m^2/g with the nitrogen content of 10.58 at%. The electrochemical properties show that the resulting sample delivers 258 F/g at a 0.5 A/g and excellent capacity retention of 79% at 20 A/g. After conducting 10,000 charge-discharge cycles at 10 A/g, the capacitance retention of 98.3% is achieved.These intriguing results demonstrate that the obtained nitrogen doped clews-like carbon materials will be promising electrode materials for supercapacitor and other energy storage devices. | Shengrui Chen Jiyuan Liang Jinxing Zhao Haifeng Li Yan Liu Heming Deng Chang Liu Shun Tang Yuan-Cheng Cao | 2019 | Chinese Chemical Letters2019，30，3： | 2 |
| 7 | In-situ synthesis of nanomagnetites on polyamidoamine modified graphite oxides and their novel catalytic performances to- wards the degradation of p-nitroaniline 显示文摘 | Liu Xiang Zhao Tiantian Cheng Heming | 2014 | Applied Sur- face Science2014，327，2015： | 1 |
| 8 | 3D-SoC Analytical Computing and ANSYS Simulation for Thermal Analysis and Design显示文摘 | LI Wenshi ZHAO Heming LIU Biao | 2006 | Chinese Journal of Electronics2006，15，2： | 1 |
| 9 | Density Functional Theory Study on (Cl2GaN3)n (n=1 4) Clusters显示文摘 | Xia, Qiying Ma, Dengxue Zhao, Wenwei Xiao, Heming | 2011 | Chinese Journal of Chemistry2011，29，9： | 1 |
| 10 | Research of whispered speech vocal tract system conversion based on universal background model and effective Gaussian components显示文摘Directing to the weakness of the present fixed values mapping methods(method_F),a vocal tract system conversion method based on the universal background model(UBM) is proposed for improving the performance of the speech conversion system from Chinese whispered speech to normal speech.For the numerous components of UBM,the errors produced by the acoustical probability density statistical model can't be ignored.Thus an effective Gaussian mixture components chosen method based on the posterior probability summation of the minimum spectral distortion is developed to optimizing the system performance.The proposed method(method_U) is analyzed and compared using the performance index(PI) based on Itakura-Saito spectral distortion measure.It is shown experimentally that the performance of method_U is more stability for different speakers and different phonemes than that of method_F.The average PI of method-U is better than method_F.It is shown that by selecting effective Gaussian mixture components,the PI of method_U can be further improved 5.11%.Subjective auditory tests also show that the proposed method can improve the definition and intelligibility of conversion speech. | CHEN Xueqin ZHAO Heming | 2013 | Chinese Journal of Acoustics2013，32，4： | 1 |
| 11 | Conversion from whispered speech to normal speech using the extended bilinear transformation method显示文摘A method of conversion from whispered speech to normal speech using the extended bilinear transformation was proposed.On account of the different deviation degrees of the whisper's formants in different frequency bands,the spectrum of the whispered speech will be processed in the separate partitions of this paper.On the basis of this spectrum,we will establish a conversion function able to usefully convert whispered speech to normal speech.Because of the whisper's non-linear offset in relation to normal speech,this paper introduces an expansion factor in the bilinear transform function making it correspond more closely to the actual conversion demands of whispered speech to normal speech.The introduction of this factor takes the non-linear move of the spectrum and the compression of the formant bandwidth into consideration,thus effectively reducing the spectrum distortion distance in the conversion.The experiment results show that the conversion presented in this paper effectively improves both the sound quality and the intelligibility of whispered speech. | TAO Zhi ZHAO Heming TAN Xuedan GU Jihua ZHANG Xiaojun WU Di | 2013 | Chinese Journal of Acoustics2013，32，4： | 1 |
| 12 | Loss-of-function of sox3 causes follicle development retardation and reduces fecundity in zebrafish显示文摘Folliculogenesis is essential for production of female gametes in vertebrates.However,the molecular mechanisms underlying follicle development,particularly apoptosis regulation in ovary,remain elusive.Here,we gen erated sox3 knockout zebrafish lines using CRISPR/Cas9.sox3 knockout led to follicle development retardation and a reduced fecundity in females.Comparative analysis of transcriptome between sox3^-/-and wild-type ovaries revealed that Sox3 was invoIved in pathways of ovarian steroidogenesis and apoptosis.Knockout of sox3 promoted follicle apoptosis and obvious apoptosis signals were detected in somatic cells of stages III and IV follicles of sox3^-/-ovaries.Moreover,Sox3 can bind to and activate the promoter of cyp19a1a.Up-regulation of Cyp19a1a expression promoted 17β-estradiol synthesis,which inhibited apoptosis in follicle development.Thus,Sox3 functions as a regulator of Cyp19a1a expression,via 17β-E2 linking apoptosis suppression,which is implicated in improving female fecundity. | Qiang Hong Cong Li Ruhong Ying Heming Lin Jingqiu Li Yu Zhao Hanhua Cheng Rongjia Zhou | 2019 | Protein & Cell2019，10，5： | 1 |
| 13 | Audio watermarking based on psychoacoustic model and critical band wavelet transform显示文摘基于数字听觉的信号的批评乐队小浪变换嵌入算法的水位标在这份报纸被建议。为每个听觉的信号片断的掩盖的阀值被计算在上 psychoacoustic 基本模型。根据人的听觉的系统和批评乐队小浪变换的批评乐队的类似,水位标被嵌进低乐队并且数字小浪的中等带宽系数。嵌入的力量被掩盖的阀值适应地控制。嵌入的水位标信号是听不见的实验结果表演,和 watermarked 声音信号对象压缩那样的许多攻击有好坚韧性,噪音,重新采样,低通行证的过滤。 | TAO Zhi ZHAO Heming GU Jihua WU Di | 2007 | Chinese Journal of Acoustics2007，26，1： | 1 |
| 14 | Whispered speaker identification based on feature and model hybrid compensation显示文摘In order to increase short time whispered speaker recognition rate in variable channel conditions,the hybrid compensation in model and feature domains was proposed.This method is based on joint factor analysis in training model stage.It extracts speaker factor and eliminates channel factor by estimating training speech speaker and channel spaces.Then in the test stage,the test speech channel factor is projected into feature space to engage in feature compensation,so it can remove channel information both in model and feature domains in order to improve recognition rate.The experiment result shows that the hybrid compensation can obtain the similar recognition rate in the three different training channel conditions and this method is more effective than joint factor analysis in the test of short whispered speech. | GU Xiaojiang ZHAO Heming Lu Gang | 2012 | Chinese Journal of Acoustics2012，31，4： | 1 |
| 15 | Accelerated start-up of two-chambered microbial fuel cells: Effect of anodic positive poised potential显示文摘 | Xin Wang Yujie Feng Nanqi Ren Heming Wang He Lee Nan Li Qingliang Zhao | 2008 | Electrochimica Acta2008，，3： | 1 |
| 16 | Heading constraint algorithm for foot-mounted PNS using low-cost IMU显示文摘Foot-mounted pedestrian navigation system(PNS)is a common solution to pedestrian navigation using micro-electro mechanical system(MEMS)inertial sensors.The inherent problems of inertial navigation system(INS)by the traditional algorithm,such as the accumulated errors and the lack of observation of heading and altitude information,have become obstacles to the application and development of the PNS.In this paper,we introduce a heuristic heading constraint method.First of all,according to the movement characteristics of human gait,we use the generalized likelihood ratio test(GLRT)detector and introduce a time threshold to classify the human gait,so that we can effectively identify the stationary state of the foot.In addition,based on zero velocity update(ZUPT)and zero angular rate update(ZARU),the cumulative error of the inertial measurement unit(IMU)is limited and corrected,and then a heuristic heading estimation is used to constrain and correct the heading of the pedestrian.After simulation and experiments with low-cost IMU,the method is proved to reduce the localization error of end-point to less than 1%of the total distance,and it has great value in application. | GUI Jing ZHAO Heming XU Xiang | 2022 | Journal of Systems Engineering and Electronics2022，33，3： | 1 |
| 17 | Accelerated start-up of two-chambered microbial fuel cells: Effect of anodic positive poised potential显示文摘 | Xin Wang Yujie Feng Nanqi Ren Heming Wang He Lee Nan Li Qingliang Zhao | 2008 | Electrochimica Acta2008，，3： | 1 |
| 18 | 2009/2010 China Top 500 Textile & Apparel Competitiveness Enterprises Announced显示文摘2009/2010 China Top 500 Tex-tile & Apparel Competitiveness Enterprises List was announced on Sept. 19th in Haining Zhejiang. The 2009/2010 China Textile & Apparel Enterprises Competitiveness Analysis Report, and the top companies in every sectors of textile | Zhao Heming | 2010 | 纺织服装周刊2010，，37： | 0 |
| 19 | 新闻(英文)显示文摘Chinese Textile Enterprises Release CSR Reports With signature of the Supply Chain Coopration Announcement between China National Textile and Apparel Council (CNTAC) and European Foreign Trade Association (FTA), Chinese textile enterprises were going to release their Corporate Social Responsibility (CSR) reports. | Zhao Heming | 2008 | 纺织服装周刊2008，，46： | 0 |
| 20 | News显示文摘2008/2009 China Top 500 Textile & Apparel Competitiveness Enterprises 2008/2009 China Top 500 Textile & Apparel Competitiveness Enterprises List was published on Aug. 8th in Guangzhou by China National Textile & Apparel Council. | Zhao Heming | 2009 | 纺织服装周刊2009，，31： | 0 |
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