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Effect of sintering temperature and holding time on structure and properties of Li_(1.5)Ga_(0.5)Ti_(1.5)(PO_4)_(3)electrolyte with fast ionic conductivity
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作者 Yin-yi LUO Hao-zhang LIANG +6 位作者 Ping ZHANG Lei HAN Qian ZHANG Li-dan LIU Zhi-wei LUO Tian-xiang NING An-xian LU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第9期2959-2971,共13页
Li_(1.5)Ga_(0.5)Ti_(1.5)PO_(4))_(3)(LGTP)is recognized as a promising solid electrolyte material for lithium ions.In this work,LGTP solid electrolyte materials were prepared under different process conditions to explo... Li_(1.5)Ga_(0.5)Ti_(1.5)PO_(4))_(3)(LGTP)is recognized as a promising solid electrolyte material for lithium ions.In this work,LGTP solid electrolyte materials were prepared under different process conditions to explore the effects of sintering temperature and holding time on relative density,phase composition,microstructure,bulk conductivity,and total conductivity.In the impedance test under frequency of 1-10^(6) Hz,the bulk conductivity of the samples increased with increasing sintering temperature,and the total conductivity first increased and then decreased.SEM results showed that the average grain size in the ceramics was controlled by the sintering temperature,which increased from(0.54±0.01)μm to(1.21±0.01)μm when the temperature changed from 750 to 950°C.The relative density of the ceramics increased and then decreased with increasing temperature as the porosity increased.The holding time had little effect on the grain size growth or sample density,but an extended holding time resulted in crack generation that served to reduce the conductivity of the solid electrolyte. 展开更多
关键词 sintering temperature holding time CONDUCTIVITY cracks solid-state electrolyte
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Impacts of bus holding strategy on the performance and pollutant emissions of a two-lane mixed traffic system
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作者 Yanfeng Qiao Ronghan Yao +1 位作者 Baofeng Pan Yu Xue 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第11期236-248,共13页
This paper investigates the impacts of a bus holding strategy on the mutual interference between buses and passenger cars in a non-dedicated bus route,as well as the impacts on the characteristics of pollutant emissio... This paper investigates the impacts of a bus holding strategy on the mutual interference between buses and passenger cars in a non-dedicated bus route,as well as the impacts on the characteristics of pollutant emissions of passenger cars.The dynamic behaviors of these two types of vehicles are described using cellular automata(CA)models under open boundary conditions.Numerical simulations are carried out to obtain the phase diagrams of the bus system and the trajectories of buses and passenger cars before and after the implementation of the bus holding strategy under different probabilities of passenger cars entering a two-lane mixed traffic system.Then,we analyze the flow rate,satisfaction rate,and pollutant emission rates of passenger cars together with the performance of a mixed traffic system.The results show that the bus holding strategy can effectively alleviate bus bunching,whereas it has no significant impact on the flow rate and pollutant emission rates of passenger cars;the flow rate,satisfaction rate,and pollutant emission rates of passenger cars for either the traffic system or for each lane are influenced by the bus departure interval and the number of passengers arriving at bus stops. 展开更多
关键词 mixed traffic flow bus holding strategy cellular automata traffic emissions
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Inter-Fraction Analysis of One Week Hypo-Fractionation of Deep Inspiration Breath Hold (DIBH) Technique for Left Sided Breast Cancer Radiation Treatment
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作者 Ntombela N. Lethukuthula Mathuthu Manny Nyathi Mpumelelo 《International Journal of Medical Physics, Clinical Engineering and Radiation Oncology》 2024年第3期41-52,共12页
The aim of this study was to investigate the inter-fraction variations, patient comfort and knowledge at Charlotte Maxeke Johannesburg Academic Hospital (CMJAH). The differences in set-up that occurred between treatme... The aim of this study was to investigate the inter-fraction variations, patient comfort and knowledge at Charlotte Maxeke Johannesburg Academic Hospital (CMJAH). The differences in set-up that occurred between treatment sessions for the left sided breast patients were observed and recorded. Measurements of routine set-up variation for 24 patients were performed by matching the cone beam computed tomography (CBCT) and the planning computed tomography (CT). Scans of all five fractions per patient were used to quantify the setup variations with standard deviation (SD) in all the three directions (anterior posterior, left right, and superior inferior). The patients DIBH comfort and knowledge was also evaluated. The average translational errors for the anterior posterior (AP, z), left-right (LR, x), and Superior-inferior (SI, y) directions were 0.40 cm, 0.40 cm, and 0.40 cm, respectively. The translation variation of the three directions showed statistical significance (P < 0.05). On comfort and knowledge investigation, among all participants, 80% moderately agreed that the therapist’s instructions for operating the deep inspiration breath hold (DIBH) technique were easy to understand, and 63.33% indicated that their comfort with the DIBH technique was neutral or average. The inter-fraction variations in patients with left-sided breast cancer were qualitatively analyzed. Significant shifts between CBCT and planning CT images were observed. The daily treatment verification could assist accurate dose delivery. 展开更多
关键词 Breast Cancer Deep Inspiration Breath hold Hypo-Fractionation Inter-Fraction
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Characterization of Hydroxyapatite Extracted from Crab Shell Using the Hydrothermal Method with Varying Holding Times
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作者 Deni Fajar Fitriyana Rifky Ismail +2 位作者 Athanasius Priharyoto Bayuseno Januar Parlaungan Siregar Tezara Cionita 《Journal of Renewable Materials》 EI CAS 2024年第6期1145-1163,共19页
Hydroxyapatite(HA)is a bio ceramic commonly utilized in bone tissue engineering due to its bioactive and osteoconductive properties.Crab shells are usually disregarded as waste material despite their significant CaCO_... Hydroxyapatite(HA)is a bio ceramic commonly utilized in bone tissue engineering due to its bioactive and osteoconductive properties.Crab shells are usually disregarded as waste material despite their significant CaCO_(3) content,and have not been widely utilized in the synthesis of HA.This study aims to synthesize and analyze HA derived from crab shells using the hydrothermal method with different durations of holding time.This study utilized precipitated calcium carbonate(PCC)derived from crab shells.With a hydrothermal reactor set at 160℃ and varying holding times of 14(HA_14),16(HA_16),and 18(HA_18)h,a PCC and(NH4)2HPO4 mixture was used to synthesize HA.The synthesis results were analyzed using scanning electron microscopy(SEM),fourier transform infrared spectroscopy(FTIR),and X-ray diffraction(XRD)tests.This study has accomplished the synthesis of HA from crab shells.Nonetheless,the final product of synthesis still contained CaCO_(3) as an impurity.The prolonged hydrothermal holding time of 14 to 18 h resulted in a reduction of impurities while increasing the percentage of crystal weight and crystallite size of HA.Specimen CH_18 is the best-quality product generated in this study.This specimen produced HA with the highest percentage of crystal weight and crystallite size compared to the other specimens.Furthermore,specimen CH_18 exhibited the lowest concentration of impurities.The Ca/P ratio in this specimen was also the closest to 1.67.The Ca/P ratio,crystallite size,and crystal weight percentage of this specimen are 1.54,19.06 nm,and 99.1%,respectively. 展开更多
关键词 HYDROXYAPATITE crab shells CaCO_(3) HYDROTHERMAL holding time
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Application of a 2 Parameter Weibull Distribution in Modeling of State Holding Time in HIV/AIDS Transition Dynamics
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作者 Nahashon Mwirigi 《Open Journal of Modelling and Simulation》 2024年第4期130-158,共29页
This study investigates the application of the two-parameter Weibull distribution in modeling state holding times within HIV/AIDS progression dynamics. By comparing the performance of the Weibull-based Accelerated Fai... This study investigates the application of the two-parameter Weibull distribution in modeling state holding times within HIV/AIDS progression dynamics. By comparing the performance of the Weibull-based Accelerated Failure Time (AFT) model, Cox Proportional Hazards model, and Survival model, we assess the effectiveness of these models in capturing survival rates across varying gender, age groups, and treatment categories. Simulated data was used to fit the models, with model identification criteria (AIC, BIC, and R2) applied for evaluation. Results indicate that the AFT model is particularly sensitive to interaction terms, showing significant effects for older age groups (50 - 60 years) and treatment interaction, while the Cox model provides a more stable fit across all age groups. The Survival model displayed variability, with its performance diminishing when interaction terms were introduced, particularly in older age groups. Overall, while the AFT model captures the complexities of interactions in the data, the Cox model’s stability suggests it may be better suited for general analyses without strong interaction effects. The findings highlight the importance of model selection in survival analysis, especially in complex disease progression scenarios like HIV/AIDS. 展开更多
关键词 Weibull Distribution AFT Model Cox Proportional Hazards HIV/AIDS State holding Time Survival Analysis
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Dust-Holding Capacity and Bio-Chemical Changes of Plant Species Growing in an Around Opencast Mining Area of Bundelkhand Region of Uttar Pradesh, India
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作者 Priyanka Singh Amit Pal 《American Journal of Plant Sciences》 CAS 2024年第8期677-698,共22页
The present study has been carried out on a total of 50 available plant species to assess their dust-capturing capacity and biochemical performances in and around open cast granite mine areas of Jhansi district and Bu... The present study has been carried out on a total of 50 available plant species to assess their dust-capturing capacity and biochemical performances in and around open cast granite mine areas of Jhansi district and Bundelkhand University campus treated as control site. Plant species existing under a polluted environment for a long time may be considered as potentially resistant species and recommended for green belt design in mining areas, especially to cope with dust pollution. Results showed the pollution level, especially of mining-originated dust particles holding capacity of leaves and effects of different biochemical parameters (Total Chlorophyll, Protein and Carotenoid) of existing plant species both from mining areas as well as from Bundelkhand University campus. Based on their performances, Tectona grandis L., Ficus hispida L., Calotropis procera Aiton., Butea monosperma Lam. and Ficus benghalensis L., etc. are highly tolerant species while Ficus infectoria L., Artocarpus heterophyllus Lam., Ipomoea purpurea L., Allianthus excelsa Roxb. and Bauhinia variegata L. are intermediate tolerant species. T. grandis had shown the highest dust-holding capacity (2.566 ± 0.0004 mg/cm2) whereas Albizia procera (0.018 ± 0.0002 mg/cm2) was found to be the lowest dust-holding capacity. Our findings also showed that the T. grandis and F. hispida have significant dust deposition with minimal effect of dust on their leaf chlorophyll (17.447 ± 0.019 mg/g and 14.703 ± 0.201 mg/g), protein (0.699 ± 0.001 mg/g and 0.604 ± 0.002 mg/g) and carotenoid (0.372 ± 0.003 mg/g and 0.354 ± 0.003 mg/g) content respectively among all selected plant species. Therefore, in the present investigation, plant species with high tolerance to high dust-holding capacity on their leaf surfaces are preferable for green corridors as open cast granite mines and their adjacent areas. 展开更多
关键词 Bundelkhand Region Biochemical Changes Dust-holding Capacity Chlorophyll Content Open Cast Granite Mining
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Method for eliminating zero-order image in digital holography
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作者 刘雯雯 康新 +1 位作者 戴宜全 何小元 《Journal of Southeast University(English Edition)》 EI CAS 2009年第1期113-116,共4页
For eliminating the zero-order image in digital holography, a new method using the differential of the hologram intensity instead of the hologram itself for numerical reconstruction is proposed. This method is based o... For eliminating the zero-order image in digital holography, a new method using the differential of the hologram intensity instead of the hologram itself for numerical reconstruction is proposed. This method is based on digital image processing. By analyzing the spatial spectrum of the off-axis digital hologram, it theoretically proves that the zero-order image can be effectively eliminated by differential before reconstruction. Then, the detected hologram is processed in the program with differential and reconstruction. Both the theoretical analysis and digital reconstruction results show that it can effectively eliminate the large bright spot in the center of the reconstructed image caused by the zero-order image, improve the image quality significantly, and render a better contrast of the reconstructed image. This method is very simple and convenient due to no superfluous optical elements and requiring only one time record. 展开更多
关键词 digital holography zero-order image digital image processing Fresnel integral
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Axial acoustic radiation force on an elastic spherical shell near an impedance boundary for zero-order quasi-Bessel-Gauss beam 被引量:3
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作者 Yu-Chen Zang Wei-Jun Lin +1 位作者 Chang Su Peng-Fei Wu 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第4期305-318,共14页
Shell structures have increasingly widespread applications in biomedical ultrasound fields such as contrast agents and drug delivery,which requires the precise prediction of the acoustic radiation force under various ... Shell structures have increasingly widespread applications in biomedical ultrasound fields such as contrast agents and drug delivery,which requires the precise prediction of the acoustic radiation force under various circumstances to improve the system efficiency.The acoustic radiation force exerted by a zero-order quasi-Bessel-Gauss beam on an elastic spherical shell near an impedance boundary is theoretically and numerically studied in this study.By means of the finite series method and the image theory,a zero-order quasi-Bessel-Gauss beam is expanded in terms of spherical harmonic functions,and the exact solution of the acoustic radiation force is derived based on the acoustic scattering theory.The acoustic radiation force function,which represents the radiation force per unit energy density and per unit cross-sectional surface,is especially investigated.Some simulated results for a polymethyl methacrylate shell and an aluminum shell are provided to illustrate the behavior of acoustic radiation force in this case.The simulated results show the oscillatory property and the negative radiation force caused by the impedance boundary.An appropriate relative thickness of the shell can generate sharp peaks for a polymethyl methacrylate shell.Strong radiation force can be obtained at small half-cone angles and the beam waist only affects the results at high frequencies.Considering that the quasi-Bessel-Gauss beam possesses both the energy focusing property and the non-diffracting advantage,this study is expected to be useful in the development of acoustic tweezers,contrast agent micro-shells,and drug delivery applications. 展开更多
关键词 acoustic radiation force zero-order quasi-Bessel-Gauss beam impedance boundary elastic spherical shell
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Improved Grid Relaxation with Zero-Order Integrators
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作者 Jan Mueller Hans-Georg Matuttis 《Journal of Applied Mathematics and Physics》 2021年第6期1257-1270,共14页
In this research, we have improved a relaxation method for triangular meshes intended for finite element fluid simulations which contain discrete element particles. The triangle edges are treated as springs which rela... In this research, we have improved a relaxation method for triangular meshes intended for finite element fluid simulations which contain discrete element particles. The triangle edges are treated as springs which relax their lengths towards a “better” force equilibrium where the triangles are closer to equilateral shape. The actual kernel is an improved zero order integrator which is able to follow reconfigurations of the particles faster than earlier methods. The improved relaxation allows larger timesteps in the flow simulation and leads to more stable, faster mesh reconfigurations for fast moving particles in the flow. Additionally, this demonstrates how integrators of the same order zero can nevertheless have different convergence speeds towards 展开更多
关键词 zero-order Solver EQUILIBRATION Grid Generation Fluid Mechanics
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SIMULTANEOUS DETERMINATION OF NEODYMIUM AND PRASEODYMIUM BY ZERO-ORDER AND FOURTH-ORDER DFRIVATIVE SPECTROPHOTOMETRY
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作者 Nai Xing Wang Department of Applied Chemistry,Shandong University,Jinan,250100,Shandong,People’s Repulic of China 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第1期41-44,共4页
With derivative spectrophotometric method,the complexes of lanthanides with 2-(5-bromo-2-pyridylazo)-5-diethylaminophen- ol(5-Br-PADAP)in the presence of octylphenol poly(ethyleneg- lycol)ether(TX-100)were studied.It ... With derivative spectrophotometric method,the complexes of lanthanides with 2-(5-bromo-2-pyridylazo)-5-diethylaminophen- ol(5-Br-PADAP)in the presence of octylphenol poly(ethyleneg- lycol)ether(TX-100)were studied.It is found that the maximum absorption of fourth-order derivative spectra of the neodymium complex by 4f electron transitions is at 579(+)nm and 582(-)nm with molar derivative absorptivities of 5.2×10~3 1.mol^(-1).cm^(-1). The maximum absorption of the zero-order derivative spectra of the complexes for neodymium and praseodymium is at 580hm,the molar absorptivities are 1.47×10~5 l.mol^(-1).cm^(-1)for Nd and 1.26 ×10~5 l.mol^(-1).cm^(-1)for Pr.The component ratio of the complex is Nd:5-Br-PADAP=1:4.Beer's law is obeyed in the range of 0-3.75μg of Nd and Pr in 25ml of solution.The method has been used for the simultaneous determination of Nd and Pr in four synthetic samples and the results obtained are satisfactory. 展开更多
关键词 der SIMULTANEOUS DETERMINATION OF NEODYMIUM AND PRASEODYMIUM BY zero-order AND FOURTH-ORDER DFRIVATIVE SPECTROPHOTOMETRY
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Nail Holding Performance of Self-Tapping Screws on Masson Pine and Chinese Fir Dimension Lumbers
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作者 De Li Bengang Zhang +7 位作者 Yuan Tu Guoming Xiao Meifen Tian Xiaoxue Xu Xiao Zhong Qiaoyan Zhang Zhigang Wu Jiankun Liang 《Journal of Renewable Materials》 EI 2023年第10期3725-3738,共14页
Screw connection is a type most commonly applied to timber structures.As important commercial tree species in China,Masson pine and Chinese fir have the potential to prepare wood structures.In this study,the effects o... Screw connection is a type most commonly applied to timber structures.As important commercial tree species in China,Masson pine and Chinese fir have the potential to prepare wood structures.In this study,the effects of the diameter of the self-tapping screw and the guiding bores on the nail holding performance on different sections of Masson pine and Chinese fir dimension lumbers were mainly explored.The results showed that:(1)The nail holding strength of the tangential section was the maximum,followed by that of the radial section,and that of the cross section was the minimum.(2)The nail holding strength of Masson pine was higher than that of Chinese fir.(3)The nail holding strength grew with the increase in the diameter of self-tapping screws,but a large diameter would lead to plastic cracking of the timber,thus further affecting the nail holding strength.Masson pine and Chinese fir reached the maximum nail holding strength when the diameter of self-tapping screws was 3.5 mm.(4)Under a large diameter of screws,prefabricated guiding bores could mitigate timber cracking and improve its nail holding strength.(5)Prefabricated guiding bores were more necessary for the screw connection of Masson pine.The results obtained could provide a scientific basis for the screw connection design of Masson pine and Chinese fir timber structures. 展开更多
关键词 Masson pine Chinese fir self-tapping screws nail holding performance
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CAFIU holds a Webinar on the New Vision of China-Bosnia and Herzegovina Cooperation and Role of Civil Society
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《International Understanding》 2023年第1期24-25,共2页
On January 17,the Chinese Association for International Understanding(CAFIU)and the Association of Bosnia-China Friendship co-hosted the webinar themed New Vision of China-Bosnia and Herzegovina Cooperation and Role o... On January 17,the Chinese Association for International Understanding(CAFIU)and the Association of Bosnia-China Friendship co-hosted the webinar themed New Vision of China-Bosnia and Herzegovina Cooperation and Role of Civil Society. 展开更多
关键词 holds BOS EGO
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China holds the secretariat of ISO/TC 341 on heat supply network
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《China Standardization》 2023年第3期13-13,共1页
The inauguration of the secretariat of ISO/TC 341,Heat supply net work,was held in Beijing on April 11.China Urban Construction Design&Research Institute,a subordinate enterprise of China Construction Technology C... The inauguration of the secretariat of ISO/TC 341,Heat supply net work,was held in Beijing on April 11.China Urban Construction Design&Research Institute,a subordinate enterprise of China Construction Technology Consulting Co.,Ltd.(CCTC),holds the secret ariat,which is China’s first ISO secretariat for standardization in the field of housing and urban-rural development. 展开更多
关键词 ISO/TC holds NETWORK
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滇中地区主要森林凋落物有效截留量及其影响因素 被引量:2
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作者 王平 李璐杉 +1 位作者 丁智强 李玉辉 《水土保持研究》 CSCD 北大核心 2024年第3期213-221,229,共10页
[目的]研究滇中地区主要森林类型凋落物有效截留量差异及其影响因素,为该地未来植被恢复和森林管理提供科学支撑。[方法]利用样方调查法、烘干法和浸泡法分析了昆明市双河—磨南德水源林自然保护区内的地带性次生常绿阔叶林(SF)、针阔... [目的]研究滇中地区主要森林类型凋落物有效截留量差异及其影响因素,为该地未来植被恢复和森林管理提供科学支撑。[方法]利用样方调查法、烘干法和浸泡法分析了昆明市双河—磨南德水源林自然保护区内的地带性次生常绿阔叶林(SF)、针阔混交林(TF)、旱冬瓜林(ACF)、华山松林(PA)、成熟云南松林(OPY)、幼龄云南松林(YPY)、银荆林(AD)7种主要森林类型凋落物未分解层(OL)和半分解层(OF)的有效截留量及其影响因素。[结果](1) 7种森林类型凋落物厚度为2.06~7.57 cm,其中OL层1.10~4.30 cm, OF层0.83~3.93 cm,凋落物层厚度排序为TF>ACF>PA>OPY>SF>AD>YPY,凋落物蓄积量为4.75~17.45 t/hm^(2),其中OL层占比为32.02%~62.48%,OF层占比为37.52%~67.98%,凋落物层蓄积量排序为TF>PA>SF>OPY>ACF>AD>YPY。(2)凋落物最大持水率为115.3%~170.7%,初始吸水速率为3.65~5.62 g/(g·h),凋落物持水率和浸水时间的关系可用对数函数y=aln(x)+b表示,吸水速率与浸水时间可用幂函数y=kt~n表示。(3)凋落物最大持水量为7.05~32.19 t/hm^(2),排序为PA>TF>SF>OPY>ACF>AD>YPY,有效截留量为5.45~25.34 t/hm^(2),以TF最高(25.34t/hm^(2)),PA(24.99 t/hm^(2))和SF(24.62 t/hm^(2))次之,YPY最低(5.45t/hm^(2)),影响有效截留量的场地特征主要为蓄积量、自然含水率、分解强度以及厚度,影响有效截留量的水动力过程主要是最大失水量、前6.0 h平均吸水速率和前2.0 h平均吸水速率。[结论]滇中地区未来植树造林应以针阔混交林为主,注重对地带性次生常绿阔叶林的保育,采取辅助自然更新的措施促进人工纯林向混交林演化,同时减少踩踏、收集凋落物等人类活动的干扰,从而增加森林生态系统凋落物的水源涵养能力。 展开更多
关键词 凋落物 主要森林类型 持水特性 有效截留量 滇中地区
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复合型水性丙烯酸树脂乳液的制备和性能 被引量:1
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作者 王利敏 宋晓宇 +1 位作者 程森祥 陈彤 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2024年第3期39-47,共9页
采用低玻璃化转变温度、高分子量的丙烯酸树脂乳液与高玻璃化转变温度、低分子量的丙烯酸树脂分散体混合的方式,制备了无交联剂水性丙烯酸树脂复合乳液,用于彩印包装纸与塑料薄膜的热复合。以丙烯酸、丙烯酸丁酯、苯乙烯、丙烯酸羟乙酯... 采用低玻璃化转变温度、高分子量的丙烯酸树脂乳液与高玻璃化转变温度、低分子量的丙烯酸树脂分散体混合的方式,制备了无交联剂水性丙烯酸树脂复合乳液,用于彩印包装纸与塑料薄膜的热复合。以丙烯酸、丙烯酸丁酯、苯乙烯、丙烯酸羟乙酯等为原料,采用种子乳液聚合法制备了相对分子质量(1.48~1.84)×10^(5)、玻璃化转变温度(T_(g))﹣20~﹣40℃的丙烯酸酯乳液。以丙烯酸、丙烯酸丁酯、苯乙烯、α-甲基苯乙烯、马来酸单酯等为原料,采用本体聚合法制备了相对分子质量(1.34~1.65)×10^(4)、T_(g) 20~45℃、软化点80~105℃的固体树脂,进一步采用自乳化方法将固体树脂制备成树脂水分散体。考察了不同Tg的丙烯酸酯乳液与水分散体以不同比例混配后的乳液混合体的性能。研究结果表明,T_(g)为﹣27.6℃的丙烯酸酯乳液与Tg为28.2℃固体树脂的分散体以质量比8:2混合后,用于PET膜-黑色印刷纸的热复合,剥离强度达到5.6 N/25 mm,持粘性达270 h,可以充分满足覆膜材料的附着力和耐压纹等性能要求。 展开更多
关键词 丙烯酸树脂乳液 树脂水分散体 热覆膜 剥离强度 持粘性
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数据资源持有权的法律解释 被引量:6
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作者 于海纯 陈润恺 《科技与法律(中英文)》 CSSCI 2024年第2期21-30,共10页
在大数据和人工智能技术的推动下,数据资源从单纯的信息载体转变为独立的价值来源,开始出现财产属性。但其所具有的非排他性、技术依附性等特征使得传统的信息权益与权利保护范式难以适用。数据资源的价值源于对数据的控制状态,这并非... 在大数据和人工智能技术的推动下,数据资源从单纯的信息载体转变为独立的价值来源,开始出现财产属性。但其所具有的非排他性、技术依附性等特征使得传统的信息权益与权利保护范式难以适用。数据资源的价值源于对数据的控制状态,这并非实体权利。数据资源持有权在法律上应解释为“持有主体合法控制数据资源并免受非法干扰和攻击的利益”。持有利益受侵害所造成的损失属于纯粹经济损失,应采用行为主义保护模式,通过侵权法一般条款进行救济。持有主体则应根据具体数据类型遵守相应的行为标准。此外,个人信息数据的相关规则是基于风险防范的考量,对数据所携带信息采取保护措施,个人信息主体属于数据来源者而非数据资源持有主体。 展开更多
关键词 数据产权 数据资源持有权 利益保护 行为主义
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数字经济与新型城镇化:作用机制和门槛效应 被引量:7
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作者 韩刚 李润琴 《工业技术经济》 CSSCI 北大核心 2024年第1期21-30,共10页
随着新一代信息技术蓬勃发展,数字经济无疑是实现新型城镇化的必然选择。本文基于2013~2022年30个省(区、市)的面板数据,通过构造数字经济发展水平指数与新型城镇化水平指数研究数字经济对新型城镇化的影响,并引入技术创新和碳减排分析... 随着新一代信息技术蓬勃发展,数字经济无疑是实现新型城镇化的必然选择。本文基于2013~2022年30个省(区、市)的面板数据,通过构造数字经济发展水平指数与新型城镇化水平指数研究数字经济对新型城镇化的影响,并引入技术创新和碳减排分析数字经济驱动新型城镇化的作用机制。研究发现,数字经济对我国新型城镇化的建设具有明显的推动作用,在新型城镇化水平低的省(区、市)与中部地区提升效果更明显;机制分析表明,技术创新和碳减排是数字经济促进新型城镇化的重要传导机制;通过进一步的门槛检验发现,数字经济对新型城镇化的推动作用因产业结构的不断升级呈现出先正后负的特征。研究结论可为加速释放数字经济红利,推动新型城镇化发展提供经验证据和政策启示。 展开更多
关键词 数字经济 新型城镇化 技术创新 碳减排 产业结构 门槛效应
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ESG表现如何影响公司现金持有? 被引量:2
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作者 曾春华 李玉滢 《金融理论与实践》 北大核心 2024年第3期72-81,共10页
ESG表现会通过影响公司融资约束和代理问题而影响公司的现金持有行为。基于我国沪深两市A股2017—2022年上市公司面板数据,实证检验了ESG表现与公司现金持有的关系。研究发现,良好的ESG表现能够缓解公司的融资约束、降低管理层的在职消... ESG表现会通过影响公司融资约束和代理问题而影响公司的现金持有行为。基于我国沪深两市A股2017—2022年上市公司面板数据,实证检验了ESG表现与公司现金持有的关系。研究发现,良好的ESG表现能够缓解公司的融资约束、降低管理层的在职消费与大股东的资金占用,进而降低公司的现金持有水平,并且这种影响在市场发育相对不完善和分析师跟踪较少的子样本中更加显著。进一步研究发现,良好的ESG表现在降低公司现金持有水平的同时还可以提高公司现金持有价值,增加公司的创新投资支出,优化公司的现金配置。研究揭示了ESG表现影响公司现金持有的具体效应和内在逻辑,有助于为公司进一步加强ESG建设、优化现金管理提供经验证据。 展开更多
关键词 ESG表现 现金持有 代理成本 融资约束
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Application of Deep Inspiration Breath Hold Technique in Radiotherapy After Breast- Conserving Surgery for Left Breast Cancer and Its Improvement on Cardiac Dose
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作者 Yu Luo Lihan Huang +5 位作者 Qiao Lan Yurui Wu Yin Li Xiaorong Cheng Kunhai Xiong Xiaoyu Wu 《Proceedings of Anticancer Research》 2023年第5期61-65,共5页
Objective:To analyze the application of deep inspiration breath hold technique in radiotherapy after breast-conserving surgery for left breast cancer and the improvement of cardiac dose.Methods:A total of 45 patients ... Objective:To analyze the application of deep inspiration breath hold technique in radiotherapy after breast-conserving surgery for left breast cancer and the improvement of cardiac dose.Methods:A total of 45 patients with left breast cancer treated in our hospital after breast-conserving surgery were selected,and the selection time was set from January 2020 to August 2022.All patients received radiotherapy.The right breast,heart,and lung volumes,and dose parameters of the heart,lungs,right breast,and left anterior descending coronary artery were compared under free breathing(FB)and deep inspiration breath hold(DIBH)technical modes.Results:The heart volume of the DIBH group was smaller than that of the FB group,and the left and right lung volumes were significantly larger than those of the FB group.In the DIBH group,the heart dose parameters V5,proper lung dose parameters,and left anterior descending coronary artery dose parameters were found lower than that of the FB group,and the differences were statistically significant(P<0.05).Conclusion:Compared with FB,the DIBH technique can reduce the heart’s size and increase the lung volume when used for radiotherapy after breast-conserving surgery for left breast cancer.It also reduces the dose to the heart,right lung,and left anterior descending coronary artery,thus protecting the heart and lungs. 展开更多
关键词 Breast cancer Breast-conserving surgery Deep inspiration breath hold Free breathing Cardiac dose
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纤维包自动除带及拆袋机的抱夹装置设计 被引量:1
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作者 裴泽光 胡文斌 +1 位作者 刘琰 李继锋 《棉纺织技术》 CAS 2024年第2期73-77,共5页
为降低工人劳动强度,实现面向直行往复式自动抓棉机的纤维包自动化搬运与排放,介绍了一种纤维包自动除带及拆袋机中的基于自动导向车(AGV)的抱夹车结构,并对抱夹车的抱夹装置结构进行了设计,确定了抱夹装置中抱夹爪的尺寸,对抱夹车的抱... 为降低工人劳动强度,实现面向直行往复式自动抓棉机的纤维包自动化搬运与排放,介绍了一种纤维包自动除带及拆袋机中的基于自动导向车(AGV)的抱夹车结构,并对抱夹车的抱夹装置结构进行了设计,确定了抱夹装置中抱夹爪的尺寸,对抱夹车的抱夹装置和抱夹支撑部分主要机构进行了设计计算,根据工作要求设计了抱夹爪传动机构的齿轮齿条参数;通过对纤维包和各构件进行受力分析,确定了各油缸的负载,并对油缸进行了选型。经设计,抱夹装置的夹爪高度为1 200 mm,夹爪长度为600 mm,两夹爪间的开合范围为660 mm~910 mm;抱夹爪油缸使用压力为140 kg/cm2,缸径为100 mm,行程为5 mm~280 mm;抱夹支撑机构油缸的最小工作压力为0.97 MPa,缸径为80 mm,杆径为40 mm,行程为400 mm。 展开更多
关键词 纤维包 抱夹装置 结构设计 抓棉机 自动化
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