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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 | Carbon neutrality needs a circular metal-energy nexus显示文摘Carbon neutrality requires systematic transformations of both energy and metal systems.These transformations are not isolated but rather interlinked and interdependent,such that trade-offs between different strategies exist.Herein,we explore the critical interlinkages between energy and metal systems and further propose a circular metal-energy nexus to advance global coordinated actions towards a carbon-neutral future. | Peng Wang Heming Wang Wei-Qiang Chen Stefan Pauliuk | 2022 | Fundamental Research2022，2，3： | 10 |
| 3 | Preparation,crystal structure and quantum chemical investigation of[Li(NTO) (H_2O)_2]显示文摘[Li(NTO)(H2O2]was prepared by mixing the aqueous solution of 3-nitro-1,2,4-triazol-5-one (NTO) and lithium hydroxide. The crystal structure of [Li(NTO)(H2O)2] was determined by single crystal diffraction analysis. The crystal is monoclinic, space group P21/n with crystal parameters of α =0.7420(2) nm, b=0.344 9(1) nm, c=2.490 6(3) nm,β=94.89(1)°, Z=4, Dc=1.799 g.cm-3, V=0.635 nm3,μ= 1.591 cm-1, F(000) = 392. The final R is 0.051. The MNDO MO calculation shows that the coordinate bonds of title compound possess certain extent of covalent character. O2 atom of NTO anion is bonded to Li atom; the nitro group will be lost first when NTO is decomposed. | SONG Jirong , CHEN Zhaoxu , XIAO Heming , HU Rongzu and LI Fuping Department of Chemical Engineering, Northwest University, Xi’ an 710069, China Department of Chemistry, Nanjing University of Science and Technology, Nanjing 210094, China Xi’an Modern Chemistry Research Institute, Xi’ an 710065, China | 1999 | Chinese Science Bulletin1999，44，3： | 5 |
| 4 | Revealing the Precise Role of Calretinin Neurons in Epilepsy: We Are on the Way显示文摘Epilepsy is a common neurological disorder characterized by hyperexcitability in the brain.Its pathogenesis is classically associated with an imbalance of excitatory and inhibitory neurons.Calretinin(CR)is one of the three major types of calcium-binding proteins present in inhibitory GABAergic neurons.The functions of CR and its role in neural excitability are still unknown.Recent data suggest that CR neurons have diverse neurotransmitters,morphologies,distributions,and functions in different brain regions across various species.Notably,CR neurons in the hippocampus,amygdala,neocortex,and thalamus are extremely susceptible to excitotoxicity in the epileptic brain,but the causal relationship is unknown.In this review,we focus on the heterogeneous functions of CR neurons in different brain regions and their relationship with neural excitability and epilepsy.Importantly,we provide perspectives on future investigations of the role of CR neurons in epilepsy. | Yingbei Qi Heming Cheng Yi Wang Zhong Chen | 2022 | Neuroscience Bulletin2022，38，2： | 3 |
| 5 | Theoretical study on tetrazole and its derivatives (Ⅰ)──Ab initio study on chlorotetrazole显示文摘Molecular geomitries and electronic structures of four chlorotetrazoles are calculated with ab initio method at MP2/6-311G ** level. The results show that all the titled compounds are planar and aromatic. The skeletal bond lengths of the ring tend to be uniformized. Compared with 1- and 2-substituted chlorotetrazoles, 5-substituted chlorotetrazoles are more acidic and lower in total energy. 5-chloro-2H-tetrazole has the lowest energy and is the most stable. | XIAO Heming, CHEN Zhaoxu and GONG Xuedong Department of Chemistry, Nanjing University of Science and Technology, Nanjing 210094, China | 1998 | Chinese Science Bulletin1998，43，6： | 3 |
| 6 | Analysis on Thermal Environment of Underlying Surface and PM2.5 Concentration in Community Park of Beijing in Winter显示文摘Community park is one of the most important landscape spaces for urban people to live outdoors,and people’s perception of environmental microclimate is a direct factor affecting the use frequency and experience of community parks.In this paper,Shijingshan Sculpture Park of Beijing was taken as experimental object.Using the method of fi eld measurement,9-d winter test for 3 months was conducted in three kinds of landscape architecture spaces,including waterfront plaza,open green space and square under the forest.Via regression analysis method,the measured air temperature(Ta),relative humidity of air(RH),particulate matter(PM2.5)were analyzed.It is found that winter sunshine is main infl uence factor of garden microclimate,and there is a negative correlation between local temperature and humidity;local temperature and humidity can regulate the local PM2.5 concentration,and temperature shows negative correlation with PM2.5 concentration,while humidity shows positive correlation with PM2.5 concentration.Meanwhile,via comparative analysis of temperature,humidity and PM2.5 concentration in different types of garden spaces,the infl uence of different space forms,planting forms and materials on thermal environment of underlying surface and PM2.5 concentration was summarized,and design strategy was optimized,to be as benefi cial reference of reconstruction design of community parks. | PENG Li XU Zhenghou CHEN Heming | 2020 | Journal of Landscape Research2020，12，6： | 3 |
| 7 | 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 |
| 8 | Concurrent chemoradiotherapy in locally advanced nasopharyngeal carcinoma: A treatment paradigm also applicable to patients in Southeast Asia显示文摘 | Heming Lu Luxing Peng Xianbin Yuan Yanrong Hao Zhiping Lu Jiaxin Chen Jinjian Cheng Shan Deng Junzhao Gu Qiang Pang Jian Qin | 2009 | Cancer Treatment Reviews2009，，4： | 1 |
| 9 | Resveratrol upregulates expression via activation of NF-E2- related factor 2 in PC12 cells 显示文摘 | Chen CY Jang JH heme oxygenase J Li MH | 2005 | BiochemBiophys Res Commun2005，331，： | 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 | A model-driven approach to multidisciplinary collaborative simulation for virtual product development显示文摘 | ZHANG Heming WANG Hongwei CHEN D | 2010 | Advanced Engineering Informatics2010，24，2： | 1 |
| 12 | Theoretical and experimental studies of structure and inhibition efficiency of imidazoline derivatives显示文摘 | Daxi Wang Shuyuan Li Yu Ying Mingjun Wang Heming Xiao Zhaoxu Chen | 1999 | Corrosion Science1999，，10： | 1 |
| 13 | Theoretical and experimental studies of structure and inhibition efficiency of imidazoline derivatives显示文摘 | Daxi Wang Shuyuan Li Yu Ying Mingjun Wang Heming Xiao Zhaoxu Chen | 1999 | Corrosion Science1999，，10： | 1 |
| 14 | DFT study on nitration mechanism of benzene with nitronium ion显示文摘 | Chen Litao Xiao Heming Xiao Jijun | 2003 | J Phys Chem A2003，，11： | 1 |
| 15 | Enteropathogenic Escherichia coli Tir recruits cellular SHP-2 through ITIM motifs to suppress host immune response显示文摘 | Dapeng Yan Heming Quan Lin Wang Feng Liu Haipeng Liu Jianxia Chen Xuetao Cao Baoxue Ge | 2013 | Cellular Signalling2013，，9： | 1 |
| 16 | A model-driven approach to multidisciplinary collaborative simulation for virtual product development显示文摘 | ZHANG Heming WANG Hongwei CHEN David | 2010 | Advanced Engineering Informatics2010，24，： | 1 |
| 17 | Quantitative description of infrared radiation characteristics of preflawed sandstone during fracturing process显示文摘Previous studies show that infrared radiation temperature(IRT)abnormalities are always accompanied by the crack development in rocks under external loads.In this context,experiments were conducted on preflawed sandstone to investigate the infrared radiation characteristics during failure process.Two indicators were defined herein,i.e.coefficient of variation of IRT(CVIRT)and skewness of IRT(SIRT).The regression analysis shows that the IRT probability distributions during loading process fit the Gaussian model.The variations in the CVIRT are characterized by four stages:primary stage,steady stage,accelerating stage and post-peak stage.Besides,the variations in the SIRT are divided into three stages:primary stage,steady stage and failure and post-peak stage.The precursor point for preflawed rock failure is identified based on the CVIRTetime curve,with average precursor point of 83%of the peak stress.Compared with other IRT indicators,the proposed two IRT indicators have higher sensitivity to IRT abnormalities during failure process.Furthermore,the connection between the IRT indicators and the rock fracturing was investigated to interpret the IRT indicator abnormalities.Based on the Verhulst inverse function,a new quantitative model was presented to describe the primary stage,steady stage and accelerating stage of the CVIRTetime curve.The results obtained in this study can provide early-warning information for rock failure prediction. | Ke Zhang Xianghua Liu Yulong Chen Heming Cheng | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，1： | 1 |
| 18 | Concurrent chemoradiotherapy in locally advanced nasopharyngeal carcinoma: A treatment paradigm also applicable to patients in Southeast Asia显示文摘 | Heming Lu Luxing Peng Xianbin Yuan Yanrong Hao Zhiping Lu Jiaxin Chen Jinjian Cheng Shan Deng Junzhao Gu Qiang Pang Jian Qin | 2009 | Cancer Treatment Reviews2009，，： | 1 |
| 19 | SEPARATION OF Re AND Mo BY ADSORPTION OF ACTIVE CARBON显示文摘Separation of Re and Mo by adsorption of active carbon has been studied. The results show that Re and Mo can be separated effectively by adjusting the pH value. As pH>8.2. the coefficient of separation SRc/Mo>3.042. The adsorption isotherm for Re conforms to the Freundlich formula. | Chen, Delin Chang, Heming Meng, Qingying Xing, Changce Liaoning Institute of Technology, Jinzhou 121001, China | 1993 | 中国有色金属学会会刊:英文版1993，3，1： | 0 |
| 20 | Two-photon 3D printed spring-based Fabry-Pérot cavity resonator for acoustic wave detection and imaging显示文摘Optical fiber microresonators have attracted considerable interest for acoustic detection because of their compact size and high optical quality.Here,we have proposed,designed,and fabricated a spring-based Fabry-Pérot cavity microresonator for highly sensitive acoustic detection.We observed two resonator vibration modes:one relating to the spring vibration state and the other determined by the point-clamped circular plate vibration mode.We found that the vibration modes can be coupled and optimized by changing the structure size.The proposed resonator is directly 3D printed on an optical fiber tip through two-photon polymerization and is used for acoustic detection and imaging.The experiments show that the device exhibits a high sensitivity and low noise equivalent acoustic signal level of 2.39 mPa∕Hz^(1∕2)at 75 kHz that can detect weak acoustic waves,which can be used for underwater object imaging.The results demonstrate that the proposed work has great potential in acoustic detection and biomedical imaging applications. | HEMING WEI ZHANGLI WU KEXUAN SUN HAIYAN ZHANG CHEN WANG KEMIN WANG TIAN YANG FUFEI PANG XIAOBEI ZHANG TINGYUN WANG SRIDHAR KRISHNASWAMY | 2023 | Photonics Research2023，11，5： | 0 |
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