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RBE of Cells Irradiated by Carbon Ions

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IMP & HIRFL Annual Report 2001年第1期 71-71页

作者： li Wenjian, Zhou Guangming, Wang Jufang, Wei Zengquan Dang Bingrong, li qiang and xie hongmei

The cells were mouse melanoma B16,human cervical squamous carcinoma HeLa,Chinese hamster pulmonary V79,and human hepatoma ***^(12)C ion experiment,the cells of 1.55×10~5/ml were seeded in 35mm diameter petri dish and... 详细信息

关键词： hepatoma melanoma squamous immediately irradiation irradiated allowed incubated saline stained

Study of aerosol characteristics and sources using MAX-DOAS measurement during haze at an urban site in the Fenwei Plain

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Journal of Environmental Sciences 2021年第9期33卷 1-13页

作者： Xiaomei li Pinhua xie Ang li Jin Xu hongmei Ren Bo Ren Yanyu li Jie li Key laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China CAS Center for Excellence in Urban Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Institute of Atmospheric Physics Chinese Academy of ScienceBeijing 100029China

Atmospheric aerosols have effects on atmospheric radiation assessments,global climate change,local air quality and *** particular,aerosols are more likely transformed and accumulated in *** this paper,we used the Multi-Axis Differential Optical Absorption Spectroscopy(MAX-DOAS)instrument to study the characteristics of aerosol type and contributions of PM_(2.5) chemical components to aerosol extinction(AE),vertical distribution of aerosols,and *** December 30,2018 to January 27,2019,we conducted MAX-DOAS observations on *** proportion of PM_(2.5) to PM10 was 69.48%-95.39%,indicating that the aerosol particles were mainly fine *** analyzing the ion data and modifying Interagency Monitoring of Protected Visual Environments(IMPROVE)method,we found that nitrate was the largest contributor to AE,accounting for 31.51%,28.98%,and 27.95%of AE on heavily polluted,polluted,and clean days,***4+,OC,and SO42-were also major contributors to *** near-surface aerosol extinction retrieved from MAX-DOAS measurement the PM_(2.5) and PM10 concentrations measured by an Unmanned Aerial Vehicle(UAV)have the same trend in vertical *** increased about 3 times from surface to 500 *** the backward trajectory of the air mass during the haze,we also found that the continuous heavy pollution was mainly caused by transport of polluted air from the northeast,then followed by local industrial emissions and other sources of emissions under continuous and steady weather conditions.

关键词： MAX-DOAS Aerosol optical depth(AOD) Aerosol extinction(AE) Haze PM_(2.5) IMPROVE

Improved Plasticity of Fe_(25)Co_(25)Ni_(25)(Si_(0.3)B_(0.7))_(25) High Entropy Bulk Metallic Glass through the Addition of Cu

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Acta Metallurgica Sinica(English Letters) 2023年第3期36卷 417-425页

作者： Xueru Fan Lei xie qiang li Chuntao Chang Hongxiang li School of Physics Science and Technology Xinjiang UniversityUrumqi 830046China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This work was focused on enhancement in the plasticity of Fe_(25)Co_(25)Ni_(25)(Si_(0.3)B_(0.7))_(25) high entropy bulk metallic glass(HE-BMG)by adding minor Cu(0–1.2,in at.%).It is found that the appropriate addition of Cu can efficiently improve the plasticity of the present HE-BMG while the excessive addition of Cu will deteriorate again the plasticity,and especially,the plastic strain of the present HE-BMG is improved from 0.8%for the Cu-free alloy to 4.7%for the 0.3 at.%Cu-added *** transmission electron microscopy observation shows that there are manyα-Fe(Co,Ni)clusters with sizes of less than 5 nm dispersed in the glassy matrix in the 0.3 and 0.6 at.%Cu-added alloys,which may account for the significant improvement in the plasticity of the two alloys,and further increase in Cu content more than 0.9 at.%leads to the precipitation ofα-Fe(Co,Ni)and Fe(Co,Ni)B compound grains with diameters of tens of nanometers,in which the plasticity of the present HE-BMGs has deteriorated rapidly.

关键词： High entropy alloys Bulk metallic glasses Glass forming ability Nano-crystallization Plasticity Microstructure

A method for modeling and deciphering the persistent photoconductance and long-term charge storage of ZnO nanorod arrays

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Nano Research 2016年第10期9卷 2972-3002页

作者： qiang Zhu Changsheng xie Huayao li Dawen Zeng State Key Laboratory of Material Processing and Die & Mould Technology Nanomaterials and Smart Sensors Research LaboratoryDepartment of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

The controllability of persistent photoconductance （PPC） and charge/energy storage of ZnO nanorod arrays （NRAs） were demonstrated experimentally by tuning the nanorod diameter. The dependency of the ZnO NRAs＇ photoelectric characteristics on the nanorod diameter suggests that the Debye length and photon penetration depth in ZnO could spatially partition a standalone nanorod into three different photoelectric functional regions （PFRs）. Theoretically, a series of rate functions was employed to describe the different extrinsic/intrinsic carrier photogeneration/recombination dynamic sub-processes occurring in the different PFRs, associated with oxygen chemisorption/photodesorption, oxygen vacancy photoionization, and electron trapping by photoionized oxygen vacancies. On the basis of the coupled contributions of these different dynamic sub-processes in the photoelectric properties of the ZnO NRAs, a thorough-process photoelectric dynamic model （TPDM） was proposed using the simultaneous rate functions. Through solving the rate functions, the corresponding analytical equations could be employed to simulate the time-resolved PPC spectra of the ZnO NRAs, and then the quantitative parameters extracted to decipher the PPC and charge/energy storage mechanisms in the ZnO NRAs. In this way, the TPDM model provided a numerical-analytical method to quantitatively evaluate the photoelectric properties of ZnO NRA-based devices. Additionally, the TPDM model revealed how the different photoinduced carrier dynamics in the different PFRs could play functional roles in different optoelectronic applications, e.g., photodetectors, photocatalysts, solar cells and optical nonvolatile memories, and thus it illuminated a practical approach for the design of ZnO NRA-based devices via optimization of the modularized spatial configuration of the PFRs.

关键词： ZnO photoconductance spectrum persistent photoconductance photogenerated carrier rate function analytical fitting

交联型聚乙烯醇纸张表面施胶剂的制备及其应用

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陕西科技大学学报 2025年第1期43卷 1-7页

作者：费贵强李实肖文娟杨晨榕解攀陕西科技大学化学与化工学院陕西省轻化工助剂重点实验室陕西西安710021 西安北方惠安化学工业有限公司陕西西安710302

为了改善聚乙烯醇、淀粉作为纸张表面施胶剂的应用性能,选用γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)和硼砂(STB)为交联剂,交联改性淀粉(PS)和聚乙烯醇(PVA1799),制备出不同交联程度的纸张表面施胶剂(CPSn-PVA).通过傅里叶红外光谱(FT-I... 详细信息

为了改善聚乙烯醇、淀粉作为纸张表面施胶剂的应用性能,选用γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)和硼砂(STB)为交联剂,交联改性淀粉(PS)和聚乙烯醇(PVA1799),制备出不同交联程度的纸张表面施胶剂(CPSn-PVA).通过傅里叶红外光谱(FT-IR),扫描电镜(SEM)及稳定性测试对纸张表面施胶剂的性能进行了表征,探讨了KH560和STB的添加比例对纸张施胶剂的性能以及施胶后纸张物理性能的影响.实验结果表明,当STB添加量为0.1 g、KH560添加量为3 g时,纸张施胶剂膜拉伸强度可达25.6 MPa、断裂伸长率为326%.同时,与原纸相比,多重交联型纸张表面施胶剂表现出良好的应用性能,施胶后的纸张耐折次数、撕裂指数、接触角分别提升了6700%、65.04%、89.7%.

关键词：表面施胶剂改性淀粉聚乙烯醇硅烷偶联剂稳定性耐折度

Mechanism of micro-wetting of highly hydrophobic coal dust in underground mining and new wetting agent development

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International Journal of Mining Science and Technology 2023年第1期33卷 31-46页

作者： Mingzhong Gao hongmei li Yun Zhao Yiting liu Weiqi Zhou Luming li Jing xie Jie Deng State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu 610065China Guangdong Provincial Key Laboratory of Deep Earth Sciences Geothermal Energy Exploitation and UtilizationInstitute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060China College of Food and Bioengineering Chengdu UniversityChengdu 610106China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

The internal mechanism of the high hydrophobicity of the coal samples from the Pingdingshan mining area was studied through industrial,element,and surface functional group *** testing and molecular dynamics simulations were employed to study the impact of three types of surfactants on the surface adsorption properties and wettability of highly hydrophobic bituminous *** results show that the surface of highly hydrophobic bituminous coal is compact,rich in inorganic minerals,and poorly wettable and that coal molecules are dominated by hydrophobic functional groups of aromatic rings and aliphatic *** wetting performance of surfactants as the intermediate carrier to connect coal and water molecules is largely determined by the interaction force between surfactants and coal(Fs-c)and the interaction force between surfactants and water(Fs-w),which effectively improve the wettability of modified coal dust via modifying its surface electrical properties and surface energy.A new type of wetting agent with a dust removal rate of 89%has been developed through discovery of a compound wetting agent solution with optimal wetting and settling *** paper provides theoretical and technical support for removing highly hydrophobic bituminous coal dust in underground mining.

关键词： Dust removal technology Bituminous coal dust New dust suppressant Mine safety Molecular dynamics

Optimizing Strength and Ductility of Titanium Alloys by Oxygen: Review and Prospect

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Chinese Journal of Structural Chemistry 2020年第4期39卷 615-622页

作者： CAI Ze-Yun li Kun xie Guo-qiang School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055China

The traditional strengthening elements of titanium alloys include Al,Mo,V,etc.,however,the high cost and toxicity of these elements put a limit on their further applications for *** light elements such as oxygen are hopeful replacement due to high *** is recognized that the oxygen enhances the strength but pays the price of brittleness,thus the amount of oxygen is ***,recent study results indicated that excess oxygen can keep high ductility together with high strength of *** paper reviews the influence and the mechanism of oxygen on the strength and ductility of titanium alloys,and provides a new perspective for the strengthening method of titanium alloys.

关键词： oxygen strength ductility titanium alloy

Changes in the thermodynamic properties of alkaline granite after cyclic quenching following high temperature action

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International Journal of Mining Science and Technology 2021年第5期31卷 843-852页

作者： Jianjun Hu Heping xie qiang Sun Cunbao li Guikang liu College of Water Resource and Hydropower Sichuan UniversityChengdu 610065China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Deep Underground Engineering Sciences and Green Energy Shenzhen UniversityShenzhen 518060China Geological Research Institute for Coal Green Mining Xi'an University of Science and TechnologyXi’an 710054China

During the development of hot dry rock,the research on thermal fatigue damage caused by thermal shock of cold and heat cycles is the basis that ensures the long-term utilization of geothermal resources,but there are not enough relevant studies at *** on this,the thermal damage tests of granite at different temperatures(250,350,450°C)and quenching cycles(1,5,10,15 cycles)were carried *** reveals the damage mechanism and heat transfer law of the quenching cycle effect on hot dry *** results show that with the increase of temperature and cycles,the uneven thermal expansion of minerals and the thermal shock caused by quenching promote the crack development of granite,resulting in the decrease of P-wave velocity,thermal conductivity and uniaxial compressive strength of ***,the COMSOL was used to simulate the heat transfer of hot dry rock under different heat treatment *** concluded that the increase in the number of quenching cycles reduced the heat transfer capacity of the granite,especially more than 10 quenching cycles,which also reflects that the thermal fatigue damage leads to a longer time for the temperature recovery of the hot dry rock *** addition,the three-dimensional nonlinear fitting relationship among thermal conductivity,temperature and cycle number was established for the first time,which can better reveal the change rule of thermal conductivity after quenching thermal fatigue effect of hot dry *** research results provide theoretical support for hot dry rock reservoir reconstruction and production efficiency evaluation.

关键词： Alkaline granite Quenching cycle Thermal conductivity P-wave velocity High-temperature Deep rock

Seismic Deformation and Seismic Resistance Analysis of Shapai Roller Compacted Concrete Arch Dam Based on Field Monitoring and Dynamic Finite Element Method

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Journal of Mountain Science 2013年第1期10卷 137-148页

作者： ZHUO li HE Jiang-da xie Hong-qiang College of Water Resources and Hydroelectricity Sichuan University State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University

Shapai Roller Compacted Concrete(RCC) Arch Dam is the highest RCC arch dam of the 20th century in the world with a maximum height of 132m,and it is the only concrete arch dam near the epicentre of Wenchuan earthquake on May 12th,*** seismic damage to the dam and the resistance of the dam has drawn great *** paper analyzed the response and resistance of the dam to the seismic wave using numerical simulations with comparison to the monitored *** field investigation after the earthquake and analysis of insitu data record showed that there was only little variation in the opening size at the dam and foundation interface,transverse joints and inducing joints before and after the *** overall stability of the dam abutment resistance body was quite good except a little relaxation was *** results of the dynamic finite element method(FEM) showed that the sizes of the openings obtained from the numerical modeling are comparable with the monitored values,and the change of the opening size is in millimeter *** study revealed that Shapai arch dam exhibited high seismic resistance and overload capacity in the Wenchuan earthquake *** comparison of the monitored and simulated results showed that the numerical method applied in this paper well simulated the seismic response of the *** method could be useful in the future application on the safety evaluation of RCC dams.

关键词： Deformation monitoring Nonlinear dynamic finite element analysis RCC arch dam Wenchuan earthquake Power station