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| 1 | Development of Chinese characterization factors for land use in life cycle impact assessment显示文摘A model with Chinese characterization factors for quantifying the damages to environment by land use in terms of the change in net primary productivity (NPP) of ecosystem was developed in the framework of life cycle assessment (LCA).In this method,the forms of land utilization were divided into two aspects involving long-term use of land (e.g.,for arable farming),namely 'land occupation',and the change of land properties (e.g.,from agricultural area to urban area),namely 'land transformation'.Furthermore,the land use elementary flows (occupation and transformation) and parameters were linked to the impact indicators,and the characterization formulas of the two forms of land utilization were derived respectively according to the ecological theory.Moreover,based on this method,the characterization factors of both land occupation and land transformation were calculated using Chinese empirical information on NPP,which can be incorporated into LCA framework and applied to Chinese LCA case study to fill up the important gap in life cycle impact assessment (LCIA) of land use. | LIU Yu,NIE ZuoRen,SUN BoXue,WANG ZhiHong & GONG XianZheng School of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China | 2010 | Science China(Technological Sciences)2010，53，6： | 8 |
| 2 | Mechanical stress distribution and risk assessment of 110 kV GIS insulator considering Al_(2)O_(3)settlement显示文摘The growing application of gas insulated switchgear(GIS)in electric power system asks for higher reliability of epoxy(EP)insulators,thus it is important to seek effective methods to improve the operating reliability of GIS insulators.On the basis of the 110 kV GIS insulator,this study studied the aluminium oxide(Al_(2)O_(3))settlement in the curing process and the stress distribution of the horizontally laid GIS.Besides,the risk coefficient was defined to evaluate the operating reliability of insulators laid by different methods(I-V).Some conclusions are shown below:the Al_(2)O_(3)settlement in the curing process causes the insulator density to have a large variation from 2.13 to 2.32 g/cm^(3).The Al_(2)O_(3)content has a great influence on the mechanical performances of EP/Al_(2)O_(3)system.The first principle stress is localised on the upper interface between the insulator and the conductor,which is the main threat to the mechanical damage of insulator.The laying method V appears to be optimal with a pretty low risk coefficient of 31.5.In actual application,for the horizontally laid GIS,the insulator should be laid with the mould gate downward to improve its mechanical reliability. | Hucheng Liang Boxue Du Jin Li Zehua Wang | 2019 | High Voltage2019，4，1： | 5 |
| 3 | Nonlinear Response Analysis for Insulation Diagnosis of Water-tree Aged 10 kV XLPE Cable Using Pulse Voltage显示文摘The diagnosis of water trees of cable insulation is of great importance as the water-treeing is a primary cause of aging breakdown for the middle voltage cables. In this paper, it is described how the water-tree-aged 10 kV XLPE cables were diagnosed. The cables were subjected to electrical stress of 5.9 kV/mm and a thermal load cycle in a curved water-filled tube for 3, 6 and 12 months of aging in accor- dance with the accelerated water-tree test method. The aged cables were used as the samples for water-tree diagnosis. First, the water-tree degraded cable, was charged by a DC voltage, and then the cable was grounded while a pulse voltage was applied to it for releasing the space charge trapped in the water trees. The amount of the space charge, which corresponds to the deterioration degree of the water trees, was calculated. The effects of DC voltage amplitude, pulse voltage repetition rate and aging conditions on the amount of the space charge were studied. Obtained results show that the amount of the space charge has a positive correlation with the applied DC voltage and the ag- ing time of the cables, and that a peak value of space charge appears with the increase of the pulse voltage repetition rate. An optimum pulse voltage repetition rate under which the space charge can be released rapidly is obtained. Furthermore, the releasing mechanism of space charge by the pulse voltage is discussed. Accumulated results show that the presented method has a high resolution for the diagnosis of water tree degradation degree and is expected to be applied in practice in future. | DU Boxue WANG Li | 2013 | 高电压技术2013，39，8： | 3 |
| 4 | Evaluation of high-voltage AC cable grounding systems based on the real-time monitoring and theoretical calculation of grounding currents显示文摘For high-voltage(HV)AC cable transmission systems,the metal sheaths of three separate single-core cables are cross-bonded at each end of the cable section,to suppress the induced voltages in sheaths.The status of HV cable grounding systems is,therefore,an important consideration for power utilities.This study presents the status evaluations of 93 cable grounding systems in Beijing,obtained using the standards established by State Grid Corporation of China.As a result,13 of these systems were classified as abnormal or defective.Additionally,a theoretical calculation of grounding currents was proposed and these 13 systems are re-evaluated by comparing the calculated and measured values of certain parameters.Based on this work,the authors propose a modified evaluation standards.It is indicated that the absolute value of grounding current(|I|)during a given 24-hr period has no relationship with the status of grounding system,and the ratio of grounding current to load current(K)at the time of maximum load current could be used as a status indicator instead of K at some other time,in order to avoid possible incorrect evaluations due to light load conditions. | Zhonglei Li Boxue Du Wang Li | 2018 | High Voltage2018，3，1： | 3 |
| 5 | Passivating buried interface with multifunctional novel ionic liquid containing simultaneously fluorinated anion and cation yielding stable perovskite solar cells over 23% efficiency显示文摘Interfacial defects and energy barrier would result in serious interfacial non-radiative recombination losses.In addition,the quality of perovskite films is highly dependent on deposition substrates.Consequently,there is an urgent desire to develop multifunctional interface modulators to manage the interface between electron transport layer and perovskite layer.Here,we report a multifunctional buried interface modulation strategy that 4-fluoro-phenylammonium tetrafluoroborate (FBABF_(4)) consisting of simultaneously fluorinated anion and cation is inserted between SnO_(2)layer and perovskite layer.It is uncovered by time-of-flight secondary ion mass spectroscopy that the anion and cation in modifier are mainly located at this interface,which is put down to coordination bond of the fluorine atom on BF_(4)^(-) with SnO_(2),and the hydrogen bond of the fluorine atom on FBA^(+) with formamidinium.This suggests that simultaneous fluorination of anion and cation in the ionic liquid molecule is of crucial importance to ameliorate interfacial contact through chemical linker.The interface modification approach enables the realization of interfacial defect passivation,interfacial energy band alignment modulation,and perovskite crystallization manipulation,which are translated into enhanced efficiency and stability as well as significantly suppressed hysteresis.The multiple functions of FBABF_(4) endow the modified solar cells excellent photovoltaic performance with an efficiency exceeding 23%along with appealing long-term stability.This work highlights the critical role of fluorination strategy in engineering multifunctional organic salt modulators for improving interfacial contact. | Deyu Gao Liqun Yang Xiaohui Ma Xueni Shang Chen Wang Mengjia Li Xinmeng Zhuang Boxue Zhang Hongwei Song Jiangzhao Chen Cong Chen | 2022 | Journal of Energy Chemistry2022，31，6： | 2 |
| 6 | Effects of calcination temperature and Li^+ ions doping on structure and upconversion luminescence properties of TiO_2:Ho^(3+)-Yb^(3+) nanocrystals显示文摘Ho^(3+)-Yb^(3+) co-doped and Ho^(3+)-Yb^(3+)-Li^+ tri-doped TiO_2 nanocrystals were prepared using the sol-gel method. Effects of the calcination temperature and Li^+ ions doping on the structure and upconversion luminescence properties of Ho^(3+)-Yb^(3+) co-doped TiO_2 nanocrystals were investigated. The upconversion luminescence of nanocrystals was enhanced with the reduction of the crystal lattice symmetry and the crystallinity improvement of the matrix, which were facilitated by the calcination temperature change and Li^+ ions doping. The lowest lattice symmetry and the best crystallinity of the matrix resulted in the maximum luminescence intensity. | Kaishun Zou Guangzong Dong Juncheng Liu Boxu Xu Danping Wang | 2019 | Journal of Materials Science & Technology2019，35，4： | 1 |
| 7 | Dimension-Enhanced Ultra-High Performance Liquid Chromatography/Ion Mobility-Quadrupole Time-of-Flight Mass Spectrometry Combined with Intelligent Peak Annotation for the Rapid Characterization of the Multiple Components from Seeds of Descurainia sophia显示文摘The complex composition of herbal metabolites necessitates the development of powerful analytical techniques aimed to identify the bioactive components.The seeds of Descurainia sophia(SDS)are utilized in China as a cough and asthma relieving agent.Herein,a dimension-enhanced integral approach,by combining ultra-high performance liquid chromatography/ion mobility-quadrupole time-of-flight mass spectrometry(UHPLC/IMQTOF-MS)and intelligent peak annotation,was developed to rapidly characterize the multicomponents from SDS.Good chromatographic separation was achieved within 38 min on a UPLC CSH C18(2.1×100 mm,1.7μm)column which was eluted by 0.1%formic acid in water(water phase)and acetonitrile(organic phase).Collision-induced dissociation-MS^(2)data were acquired by the data-independent high-definition MS^(E)(HDMS^(E))in both the negative and positive electrospray ionization modes.A major components knockout strategy was applied to improve the characterization of those minor ingredients by enhancing the injection volume.Moreover,a self-built chemistry library was established,which could be matched by the UNIFI software enabling automatic peak annotation of the obtained HDMS^(E)data.As a result of applying the intelligent peak annotation workflows and further confirmation process,a total of 53 compounds were identified or tentatively characterized from the SDS,including 29 flavonoids,one uridine derivative,four glucosides,one lignin,one phenolic compound,and 17 others.Notably,four-dimensional information related to the structure(e.g.,retention time,collision cross section,MS^(1)and MS^(2)data)was obtained for each component by the developed integral approach,and the results would greatly benefit the quality control of SDS. | Simiao Wang Xue Li Boxue Chen Shitong Li Jiali Wang Jing Wang Mingshuo Yang Xiaoyan Xu Hongda Wang Wenzhi Yang | 2022 | Phyton-International Journal of Experimental Botany2022，91，3： | 1 |
| 8 | Influence of deposition time on the morphology and optical properties of SiO_2-ZnO composite photonic crystals显示文摘SiO2 photonic crystal were successfully prepared by vertical deposition and then used as a template to fabricate SiO2-ZnO composite photonic crystals on ITO substrates by electrodeposition and subsequent calcination. A number of different deposition times were used. The morphologies of the silica opals and SiO2-ZnO composite photonic crystals were investigated by scanning electron microscopy. It was found that ZnO particles grew randomly on the surfaces of the silica spheres when the deposition time was short. As the deposition time was increased, the ZnO particles grew evenly on the surfaces of the silica spheres so that the interstitial space of the silica template was filled with ZnO particles. Reflectance spectra of the SiO2-ZnO composite crystals revealed that all of the fabricated photonic crystals exhibit a photonic band gap in the normal direction. | YAN GangYin ZHANG Xin HUANG Peng WANG Lei FENG BoXue | 2011 | Chinese Science Bulletin2011，56，6： | 1 |
| 9 | Molecule diffusion behaviours of waterproof sealants into silicone rubber insulation for submarine cable joint based on molecular dynamics simulations显示文摘The repair joints of high-voltage cables play a significant role in the urgent cable main-tenance,by recovering cable conductor,insulation,shielding layer and waterproof layer especially for submarine cables.However,the molecule diffusion and permeation pro-cesses from waterproof sealant into the cable joint insulation occur,leading to the insulation ageing and deterioration.In this article,the molecule diffusion behaviours of six typical molecules from the asphalt-based and polyurethane-based waterproof sealants into silicone rubber insulation are investigated.The results show that the order of diffusion coefficients is as follows,phenanthrene>fluoranthene>pyrene>benzo[k]fluoranthene>indeno[1,2,3-cd]pyrene>polyurethane(PU).The relative molecular mass and binding energy are pivotal factors affecting the diffusion behaviour,while there is a linear relationship between the logarithm of the diffusion coefficient and the ratio of binding energy to relative molecular mass.Besides,the rising ambient temperature in-creases the fraction of free volume of silicone rubber and decreases the binding energy,thus resulting in a higher diffusion coefficient and an enhanced permeation process of the asphalt-based sealant.In summary,the PU-based waterproof sealant,with a much lower permeability than the asphalt-based material,has a potential application in the waterproof layer for high-voltage submarine cable repair joints. | Zhenpeng Zhang Heyu Wang Zhonglei Li Jiankang Zhao Shaohua Wang Wenlin Pan Wenjie Li Te Li Boxue Du | 2021 | High Voltage2021，6，2： | 1 |
| 10 | Evaluation of temperature distribution for bone drilling considering aging factor显示文摘Bone drilling is a routine operation in surgeries,such as neurosurgery and orthopedics.However,the excessive drilling temperature may cause severe thermal damage to the bone tissue.Therefore,the drilling temperature determination of bone tissue can reduce the harm caused by thermal damage.A time-varying temperature field simulation model of bone drilling was set up by ABAQUS software in this paper,based on the Johnson-Cook model.Then it was validated with experiments by drilling cortical bone of fresh bovine shaft of the femur.The relative error between the experimental values and the theoretical values within 7.67%showed a good consistency.Furthermore,the aging factor is also considered to evaluate the temperature field of bone drilling.The results showed that the drilling temperature near the bone-drill area increased significantly.The drilling temperature of cortical bone decreases sharply with the radial distance and exhibits a hysteresis lag in the axial distribution.The aging factor mainly affects the peak of drilling temperature.The peak of drilling temperature tends to increase with age.The peak drilling temperature in the elderly(70y)was up to 6.8%higher than that in the young(20y),indicating that the elderly is more prone to excessive drilling temperature.Therefore,special attention should be paid to the temperature control of elderly bone tissue. | Huanxin Wang Xiangsheng Gao Boxu Wang Min Wang Yunan Liu Tao Zan Peng Gao Chaozong Liu | 2022 | Medicine in Novel Technology and Devices2022，，4： | 0 |
| 11 | Effects of the annealing temperature on the structure and up-conversion photoluminescence of ZnO film显示文摘The up-conversion film is being tried to increase the photoelectric conversion efficiency of the silicon solar cell. To improve the efficiency of the photoluminescence film, the effects of the annealing temperature were investigated on the structure and photoluminescence of the ZnO up-conversion film, which was prepared using the sol-gel method and the spin-coating technique. The results show that the organic compounds and water in the ZnO film were completely eliminated when the annealing temperature reached 500 ℃. The crystallinity of film is improved and the average grain size continuously increases as increasing the annealing temperature. The transmittance in the wavelength range of 400-2000 nm continuously increases as the annealing temperature increases from 500 ℃ to 700 0 C, whilst it decreases first and then increases as the annealing temperature increases from 800 ℃ to 1000℃. When the film is excited with a laser of 980 nm, there are two intense emission bands in the up-conversion emission spectra, 542-nm green light and 660-nm red light, corresponding to Ho^(3+):~5 S_2/~5 F_4→~5 I_8 and ~5 F_5→~5 I_8 transitions, respectively. In addition, the intensity of up-conversion luminescence for the film increases first and then decreases with the increase of the annealing temperature. When the annealing temperature is at 900 ℃, the film consists of small round compact particles with a high degree of crystallization,reaching maximum up-conversion intensity of the film. | Xiaoqi Meng Changjiang Zhao Boxu Xu Pei Wang Juncheng Liu | 2018 | Journal of Materials Science & Technology2018，34，12： | 0 |
| 12 | Improved space charge transport model in bilayer dielectrics—considering carrier dynamic equilibrium显示文摘The Maxwell–Wagner model and bipolar charge transport model both aim at describing the charge transport behaviours in dielectrics.The Maxwell–Wagner model performs well in calculating the polarisation current and electric field distribution,but it is too macroscopic to describe the microscopic behaviours of space charges.The bipolar charge transport model can well simulate the space charge accumulation,but it cannot quantitatively relate the microscopic transport behaviours with the macroscopic conductivities of dielectrics.Considering the shortages of the above two models,an improved charge transport model,named carrier dynamic equilibrium model,was proposed in this study to simulate the polarisation process of the low-density polyethylene/ethylene propylene diene monomer bi-layer dielectric by introducing a source term of carrier dynamic equilibrium.Effects of carrier mobility and non-equilibrium carrier lifetime on the simulation results were explored,and a comparison among the results of measurement and different models was also made.Compared with the Maxwell–Wagner model and bipolar charge transport model,the improved model has the best coincidence with measurements,which can provide an accurate reference for the design of high-voltage direct current insulation systems. | Hucheng Liang Boxue Du Jin Li Hang Yao Zehua Wang | 2020 | High Voltage2020，5，2： | 0 |
| 13 | Study on non-uniformity and dynamic fracture characteristics of GIL tri-post insulators considering Al_(2)O_(3) sedimentation显示文摘Tri-post insulators in gas-insulated transmission line(GIL)are usually fabricated with high mass fraction of micron aluminum oxide(Al_(2)O_(3)),which will unavoidably settle under the action of gravity during the preparation process and seriously affect the uniformity.A model of filler sedimentation in epoxy resin composite materials was proposed based on the particle size analysis and Stokes'Law.Some scaled tri-post insulators were prepared and tested by slicing.It is determined that the position of density concentration is the lower side of the two lower posts and the upper interface between the insulator and the conductor.The density ranges from 2.144 to 2.346 g/cm^(3).The dynamic fracture simulation model of insulator was established and it is found that the insulator fracture occurs at the interface of upper post/insert under radial load,which is verified by experiments.By comparing the influence of sprue position on the density distribution,it is found that the uniformity of insulators is increased by 13.7% by forward pouring compared with reverse pouring.This research develops an accurate method for simulating the filler sedimentation and the fracture process in epoxy-based insulators,which is helpful for the improvement of mechanical reliability of GIL. | Jin Li Songtao Liu Hucheng Liang Liucheng Hao Yaxiang Wang Boxue Du | 2023 | High Voltage2023，8，4： | 0 |
| 14 | Rapid Profiling and Characterization of the Multicomponents from the Root and Rhizome of Salvia miltiorrhiza by Ultra-High Performance Liquid Chromatography/Ion Mobility-Quadrupole Time-of-Flight Mass Spectrometry in Combination with Computational Peak Annotation Workflows显示文摘Herbal components characterization represents a challenging task because of the co-existing of multiple classes of naturally occurring compounds with wide spans of polarity,molecular mass,and the ubiquitous isomerism.The root and rhizome of Salvia miltiorrhiza have been utilized as a reputable traditional Chinese medicine Salviae Miltiorrhizae Radix et Rhizoma(Dan-Shen)in the treatment of cardiovascular disease.Herein,a dimensionenhanced ultra-high performance liquid chromatography/ion mobility/quadrupole time-of-flight mass spectrometry approach in combination with intelligent peak annotation workflows was established aimed to rapidly characterize the multicomponents from S.miltiorrhiza.Due to the sufficient optimization,satisfactory chromatography separation was enabled on an HSS T3 column within 33 min using 0.1%formic acid in water(A)and acetonitrile(B)as the mobile phase,while the data-independent HDMS^(E) in both the negative and positive electrospray ionization modes was utilized for the high-coverage MS^(2) data acquisition.Streamlined automatic peak annotation by searching an in-house library(recording 198 known compounds)followed by the subsequent confirming steps(e.g.,comparison with the reference compounds,fragmentation pathways analysis,and retention behavior comparison,etc.),allowed us to identify or tentatively characterize a total of 86 components(including 50 terpenoids,21 phenolic acids,and 15 others)from S.miltiorrhiza.Importantly,three-dimensional structure information,such as the retention time,MS^(1) and MS^(2) data,and collision cross section(CCS),was provided,which can facilitate the more reliable characterization of herbal components. | Boxue Chen Hongda Wang Meiyu Liu Wandi Hu Yuexin Qian Jiali Wang Jie Liu Xue Li Jing Wang Wenzhi Yang | 2022 | Phyton-International Journal of Experimental Botany2022，91，5： | 0 |
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