检索结果-南通市图书馆

A Private User Data Protection Mechanism in TrustZone Architecture Based on Identity Authentication

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2017年第2期22卷 218-225页

作者： Bo Zhao Yu Xiao yuqing huang Xiaoyu Cui School of Computer Wuhan UniversityWuhan 430072China

In Trust Zone architecture, the Trusted Application（TA） in the secure world does not certify the identity of Client Applications（CA） in the normal world that request data access, which represents a user data leakage risk. This paper proposes a private user data protection mechanism in Trust Zone to avoid such risks. We add corresponding modules to both the secure world and the normal world and authenticate the identity of CA to prevent illegal access to private user data. Then we analyze the system security, and perform validity and performance *** results show that this method can perform effective identity recognition and control of CA to protect the security of private user data. After adding authentication modules, the data operation time of system increases by about0.16 s, an acceptable price to pay for the improved security.

关键词： embedded system TrustZone Trusted Application(TA) identity authentication private data protection

Understanding and optimizing spin injection in self- assembled InAs/GaAs quantum-dot molecular structures

在线全文

学校读者我要写书评

暂无评论

Nano Research 2016年第3期9卷 602-611页

作者： yuqing huang Yuttapoom Puttisong Irina A. Buyanova Weimin M. Chen Department of Physics Chemistry and Biology Link6ping University S-58183 LinkOping Sweden

Semiconductor quantum-dot （QD） structures are promising for spintronic applications owing to their strong quenching of spin relaxation processes that are promoted by carrier and exciton motions. Unfortunately, the spin injection efficiency in such nanostructures is very low and the exact physical mechanism of the spin loss is still not fully understood. Here, we show that exciton spin injection in self-assembled InAs/GaAs QDs and QD molecular structures （QMSs） is dominated by localized excitons confined within the QD-like regions of the wetting layer （WL） and GaAs barrier layer that immediately surround the QDs and QMSs. These localized excitons in fact lack the commonly believed 2D and 3D character with an extended wavefunction. We attribute the microscopic origin of the severe spin loss observed during spin injection to a sizable anisotropic exchange interaction （AEI） of the localized excitons in the WL and GaAs barrier layer, which has so far been overlooked. We determined that the AEI of the injected excitons and, thus, the efficiency of the spin injection processes are correlated with the overall geometric symmetry of the QMSs. This symmetry largely defines the anisotropy of the confinement potential of the localized excitons in the surrounding WL and GaAs barrier. These results pave the way for a better understanding of spin injection processes and the microscopic origin of spin loss in QD structures. Furthermore, they provide a useful guideline to significantly improve spin injection efficiency by optimizing the lateral arrangement of QMSs and overcome a major challenge in spintronic device applications utilizing semiconductor QDs.

关键词： spin injection spin loss quantum dot quantum-dot molecularstructure InAs/GaAs exciton anisotropic exchangeinteraction polarization

Analysis of long term catalytic performance for isobutane alkylation catalyzed by NMA–AlCl3 based ionic liquid analog

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2019年第8期27卷 1857-1862页

作者： Pengcheng Hu Zhitao Wu Junlin Wang yuqing huang Yang Deng Shufeng Zhou College of Chemical Engineering Huaqiao University

Isobutane alkylation with 2-butene to produce high-quality gasoline was catalyzed by Nmethylacetamide(NMA)-AlCl3 based ionic liquid(IL) analog with a NMA/AlCl3 molar ratio of 0.75 and CuCl modification,which was marked as CuCl-modified 0.75 NMA-1.0 *** long-term experiment was carried out in the autoclave operated in continuous mode to investigate the distribution of alkylate under different experimental *** result indicated that the long-term alkylation was divided into three stages:rising,stable,and descending regions.C8 selectivity and molar ratio of trimethylpentanes(TMPs) to dimethylhexanes(DMHs) reached the highest level in the stable region,and research octane number(RON) of alkylate was as high as *** Al species([AlbCl7]^-,[A1 CuC15]^-) and cationic Al species([AlCl2 L]^+) from IL analog as two active Lewis acidic species played a catalytic role in the long-term alkylation,whereas the neutral Al species did not participate into the ***,the structure of CuCl-modified 0.75 NMA-1.0 AlCl3 was destroyed after the deactivation,and CuCl was enriched in the CD2 Cl2-insoluble substance,resulting in a decreasing TMP/DMH *** catalytic lifetime of IL analog was similar with CuCl-modified 0.55 Et3 NHCl-1.0 AlCl3 IL,but IL analog had a lower cost.

关键词： Ionic liquid analog Isobutane alkylation Long-term experiment Structural analysis

Corrosion inhibiting performance and mechanism of protic ionic liquids as green brass inhibitors in nitric acid

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2020年第2期5卷 214-222页

作者： Pengcheng Hu Zhitao Wu Junlin Wang yuqing huang Quanyou Liu Shu-Feng Zhou College of Chemical Engineering Huaqiao UniversityNo.668 Jimei AvenueJimei DisrtictXiamen CityFujian Province361021China

Four protic ionic liquids(ILs)were synthesized via a one-step method by using benzotriazole(BTA)and benzimidazole as cations,and benzenesulfonic acid and 2-naphthalenesulfonic acid(NSA)as *** ILs were used as green corrosion inhibitors for brass specimens in a nitric acid *** structure of the protic ILs was characterized by 1H-NMR,13C-NMR,and FT-IR *** effects of the IL structure,IL concentration,acid concentration,and corrosion time on the surface morphology of brass specimens and the inhibition efficiency(η%)of ILs were investigated by the weight loss method combined with SEM and EDS *** curves and impedance spectroscopy were used to analyze the electrochemical corrosion inhibition mechanism of *** showed that IL synthesis was a proton transfer process,and the proton of the–SO3H group on NSA was deprived by ***[BTA][NSA],which had a high charge density and large conjugateπband,was the most effective inhibitor for brass ***η%of[BTA][NSA]decreased with the increase in acid concentration and corrosion time,which showed an increment with the increase in[BTA][NSA]*** higher theη%of[BTA][NSA]is,the smoother the surface of the brass specimens is,and the smaller the undistributed area of Cu element will *** inhibiting mechanism from electrochemical analysis indicated that the addition of[BTA][NSA]increased the polarization resistance of the brass electrode significantly and suppressed both anodic and cathodic reactions.

关键词： Protic ionic liquid Corrosion inhibitor Electrochemical mechanism Brass

Targeting glutamine utilization to block metabolic adaptation of tumor cells under the stress of carboxyamidotriazole-induced nutrients unavailability

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2022年第2期12卷 759-773页

作者： Jing Shi Rui Ju Hongting Gao yuqing huang Lei Guo Dechang Zhang Department of Pharmacology Institute of Basic Medical SciencesChinese Academy of Medical Sciences and School of Basic MedicinePeking Union Medical CollegeBeijing 100005China Department of Pharmacy Peking University Third HospitalBeijing 100191China

Tumor cells have unique metabolic programming that is biologically distinct from that of corresponding normal *** tumor metabolic programming is a promising strategy to ameliorate drug resistance and improve the tumor ***,we show that carboxyamidotriazole(CAI),an anticancer drug,can function as a metabolic modulator that decreases glucose and lipid metabolism and increases the dependency of colon cancer cells on glutamine *** suppressed glucose and lipid metabolism utilization,causing inhibition of mitochondrial respiratory chain complex I,thus producing reactive oxygen species(ROS).In parallel,activation of the aryl hydrocarbon receptor(Ah R)increased glutamine uptake via the transporter SLC1A5,which could activate the ROS-scavenging enzyme glutathione *** a result,combined use of inhibitors of GLS/GDH1,CAI could effectively restrict colorectal cancer(CRC)energy *** data illuminate a new antitumor mechanism of CAI,suggesting a new strategy for CRC metabolic reprogramming treatment.

关键词： CAI Glutaminolysis Glutamine metabolism AhR Colorectal cancer metabolism Mitochondrial oxidative stress Redox homeostasis Metabolic reprogramming

Hydrologic balance, net primary productivity and water use efficiency of the introduced exotic Eucalyptus grandis × Eucalyptus urophylla plantation in south-western China

在线全文

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2019年第6期12卷 982-992页

作者： Yanting Hu Ping Zhao yuqing huang Liwei Zhu Guangyan Ni Xiuhua Zhao Zhihong huang Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of Sciences723 Xingke RoadTianhe DistrictGuangzhou 510650China Guangdong Provincial Key Laboratory of Applied Botany South China Botanical GardenChinese Academy of Sciences723 Xingke RoadTianhe DistrictGuangzhou 510650China Key Laboratory of Beibu Gulf Environment Change and Resource Use Ministry of Education and Guangxi Key Laboratory of Earth Surface Processes and Intelligent SimulationNanning Normal University175 Mingxiu East RoadNanningGuangxi 530001China Department of Forest Ecology College of Life Science and TechnologyCentral South University of Forestry and Technology498 Shaoshan South RoadChangshaHunan 410004China

Aims Land cover changes can disrupt water balance and alter the partitioning of precipitation into surface runoff,evapotranspiration and groundwater *** widely planted Eucalyptus trees in south-western China have the potential to bring about hydrologic *** research aims to elucidate the hydrologic balance characteristics of the introduced exotic Eucalyptus grandis×Eucalyptus urophylla plantation and to assess whether its high productivity results from high water use efficiency(WUE)or large water *** A 400-m^(2) experimental plot was established in an ***×*** plantation in south-western *** balance components,including stand transpiration(T_(r)),evapotranspiration(E_(t))and runoff(R)were obtained as follows:T_(r) was estimated based on sap flow measurements,E_(t) was estimated as the average of surface transpiration and evaporation weighted by the fractional green vegetation cover using a modeling approach,and R was collected using the installed metal *** primary productivity(NPP)was obtained from allometric equation and annual diameter at breast height(DBH)increment *** Findings Annual E_(t) and T_(r) were 430±31 and 239±17 mm,*** T_(r) accounts for 56±8%of total evapotranspiration on ***(NPP/T_(r))of the ***×*** was estimated to be 3.3–3.9 mmol·mol^(−1).Based on the comparative analysis of T_(r) and WUE,***×*** had a high productivity due to its high WUE without exhibiting prodigal water *** factors including vapor pressure deficit and global solar radiation(R_(s))were key factors regulating E_(t) and T_(r) in our research *** surface runoff,E_(t) and canopy interception occupied 7%,27–30%and 16%of total precipitation,while the remaining 46–50%of precipitation was used for sustaining groundwater recharge and altering soil water *** higher runoff coefficient(7.1%)indicated the weaker capability of ***

关键词： water balance evapotranspiration water use efficiency sap flow runoff

Development of Heat Tolerant Two-Line Hybrid Rice Restorer Line Carrying Dominant Locus of OsHTAS

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rice science 2021年第1期28卷 99-108页

作者： Mehmood Jan Gulmeena Shah huang yuqing Liu Xuejiao Zheng Peng Du Hao Chen Hao Tu Jumin Zhejiang Key Laboratory of Crop Germplasm Resources Institute of Crop ScienceZhejiang UniversityHangzhou 310058ZhejiangChina

In order to create novel germplasm resources for breeding heat tolerant variety,we transferred a dominant allele OsHTAS,previously characterized and cloned from a high-temperature tolerant local variety HT54,which was collected from the rice production area of southern China,into a high-temperature sensitive intermediate breeding line HT13 through six rounds of successive backcross by using marker-assisted *** molecular analysis showed that the recovery of genetic background of a resultant near isogenic line(NIL),MHT13,was around 99.8%.The OsHTAS gene introduced in the MHT13 expressed normally in the HT13 genetic background,mediating heat tolerance and phenotype similar to those of the donor parent *** major agronomic traits of MHT13 resembled those of the recurrent parent ***,MHT13 had high general combining ability and its rice quality reached the grade 3 standard of edible high-quality rice issued by Ministry of Agriculture of the People’s Republic of China,which greatly improved its application value in rice production.

关键词： rice heat tolerance high temperature yield near isogenic line marker-assisted selection grain quality OsHAT gene

Controllable vortex lasing arrays in a geometrically frustrated exciton-polariton lattice at room temperature

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第1期10卷 196-204页

作者： Jun Wang Yutian Peng Huawen Xu Jiangang Feng yuqing huang Jinqi Wu Timothy C.H.Liew Qihua Xiong Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Department of Optical Science and Engineering and Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Fudan University State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing Academy of Quantum Information Sciences

Quantized vortices appearing in topological excitations of quantum phase transition play a pivotal role in strongly correlated physics involving the underlying confluence of superfluids,Bose-Einstein condensates and *** polaritons as bosonic quasiparticles have enabled studies of non-e quilibrium quantum gases and ***-polariton condensates in artificial lattices intuitively emulate energy-band structures and quantum many-body effects of condensed matter,underpinning constructing vortex lattices and controlling quantum fluidic ***,we harness exciton-polariton quantum fluids of light in a frustrated kagome lattice based on robust metal-halide perovskite microcavities,to demonstrate vortex lasing arrays and modulate their configurations at room *** energy-momentum spectra unambiguously reveal massless Dirac bands and quenched kinetic-energy flat bands coexisting in kagome lattices,where polariton condensates exhibit prototypical honeycomb and kagome spatial *** coherence investigations illustrate two types of phase textures of polariton condensates carrying ordered quantized-vortex arrays and π-phase shifts,which could be selected when needed using lasing emission *** findings offer a promising platform on which it is possible to study quantum-fluid correlations in complex polaritonic lattices and highlight feasible applications of structured light.

关键词： vortex lasing exciton–polariton lattice Bose–Einstein condensation the orbital angular momentum of light geometric frustration perovskite semiconductor

Optogalvanic Effect（OGE） of CO2Waveguide Laser with Compound Cavity

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

光电子·激光 1989年第2期 118-119页

作者： Ma Yangwu, Chen yuqing, huang LinDepartment of Optical InstrumentsZhejiang University

This research program is the first to report on the Opto-galvanic Effect（OGE） of CO2 waveguide laser with compound cavity. The study shows that as compared with common COlaser, the OGE of COwaveguide laser is markedly more than that of ocmmon CO2 laser. This version majoorly that waveguide laser has the characteristics of high pressure and small current alone.

关键词： of CO2Waveguide Laser with Compound Cavity OGE Optogalvanic Effect CO