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Generalized splitting-ring number theoretic transform

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Frontiers of Computer Science 2024年第4期18卷 205-207页

作者： Zhichuang LIANG Yunlei zhao Zhenfeng ZHANG School of Computer Science Fudan UniversityShanghai 200433China State Key Laboratory of Cryptology Beijing 100036China Institute of Software Chinese Academy of SciencesBeijing 100190China

1 Introduction Lattice-based cryptography is one of the most promising routine of post-quantum cryptography(PQC).The fundamental and time-consuming operation in lattice-based schemes is the polynomial multiplication i... 详细信息

关键词： ring splitting polynomial

The effects of calcium combined with chitosan amendment on the bioavailability of exogenous Pb in calcareous soil

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Journal of Integrative Agriculture 2020年第5期19卷 1375-1386页

作者： CHANG Hui-qing WANG Qi-zhen LI zhao-jun WU Jie XU Xiao-feng SHI zhao-yong Henan University of Science and Technology Luoyang 471000P.R.China Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs/China-New Zealand Joint Laboratory for Soil Molecular EcologyInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081P.R.China

Lead(Pb) in soil may accumulate in crops and enter the human body. This study aimed to understand the speciation transformation and accumulation characteristics of exogenous Pb in calcareous soil with or without the application of soil amendments. Field experiments with continuous maize cultivation have been carried out for two years. The results showed that the contents of total Pb were slightly lower in 2016 than in 2015 for the same treatments;however, no significant difference between the years was observed. Soil Pb existed mainly in the residual fraction without exogenous Pb addition, and its proportion was more than 33% of the total soil Pb in the control and Ca treatments. When Pb was added to calcareous soil, Pb existed largely in the oxidizable and reducible fractions during the two-year experimental period, and those fractions made up over 83% of the total Pb. The proportion of the water-soluble Pb, regardless of the addition of Pb, was the lowest and was less than 0.0019% in all treatments, but the addition of Ca and chitosan amendments reduced the water-soluble and exchangeable Pb contents. The Pb content in different parts of maize followed the order root>leaf>stem>grain during the experimental period. Although maize had low transfer and enrichment factors in calcareous soil, which make the Pb content in the grain show no significant difference among the five treatments in the same year, adding Ca and chitosan to calcareous soil can reduce the Pb contents of maize, especially reduce the Pb contents of root, stem and leaf. Therefore, the addition of calcium and chitosan is an effective strategy for reducing Pb availability in calcareous soils.

关键词： exogenous Pb maize calcareous soil speciation transformation amendments

Synergistic CO_(2)reduction and tetracycline degradation by CuInZnS-Ti_(3)C_(2)T_(x)in one photoredox cycle

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Nano Research 2022年第9期15卷 8010-8018页

作者： Lijing Wang Zhan Zhang Renquan Guan Dandan Wu Weilong Shi Limin Yu Pan Li Wei Wei zhao zhao Zaicheng Sun Henan Engineering Center of New Energy Battery Materials Henan D&A Engineering Center of Advanced Battery MaterialsCollege of Chemistry and Chemical EngineeringInstitute of Architectural EngineeringShangqiu Normal UniversityShangqiu 476000China Faculty of Physics Faculty of ChemistryNortheast Normal UniversityChangchun 130024China Center of excellence for environmental safety and biological effects Beijing Key Lab for Green Catalysis and SeparationDepartment of Chemistry and Chemical EngineeringCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Optimizing photocatalytic CO_(2)reduction with simultaneous pollutant degradation is highly ***,the photocatalytic efficiency is restricted by the unmatched redox ability,high carriers’recombination rate,and lack of reactive sites of the present ***,the CuInZnS-Ti_(3)C_(2)T_(x)hybrid with matched redox ability and suitable CO_(2)adsorption property was rationally *** nucleation and growth process of CuInZnS was interfered by the addition of Ti_(3)C_(2)T_(x)with a negative charge,resulting in thinner nanosheets and richer reactive ***,the Schottky heterojunction built in the hybrid simultaneously improved the photoexcited charge transfer property,sunlight absorption range,and CO_(2)adsorption ***,upon exposure to sunlight,CuInZnS-Ti_(3)C_(2)T_(x)exhibited an efficient photocatalytic CO_(2)reduction performance(10.2μmol·h^(−1)·g^(−1))with synergetic tetracycline degradation,obviously higher than that of pure *** on the combination of theoretical calculation and experimental characterization,the photocatalytic mechanism was investigated *** work offers a reference for the remission of worldwide energy shortage and environmental pollution problems.

关键词： CuInZnS-Ti_(3)C_(2)T_(x) photocatalysis CO_(2)reduction tetracycline degradation

ANALYSIS OF METHOD FOR DETERMINING AZIMUTH OF PRINCIPAL AXIS OF INERTIA BASED ON DYNAMIC BALANCE MEASUREMENT

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 530-533页

作者： zhao Jun GUAN Yingzi QI Naiming College of Astronautics Harbin Institute of Technology Harbin 150001 China

The dynamic balance quality of a rotating object is an important factor to maintain the stability and accuracy for motion. The azimuth of the principal axis of inertia is a major sign of dynamic balance. A usual method is measuring moment of inertia matrix relative to some base coordinates on a rotary inertia machine so as to calculate the azimuth of principal axis of inertia, By using the measured unbalance results on the two trimmed planes on a vertical hard bearing double-plane dynamic balancing machine, the dimension and direction of couple unbalance can be found. An azimuth angle formula for the principal axis of inertia is derived and is solved by using unbalance quantities. The experiments indicate that method based on dynamic balancing measurement is proved rational and effective and has a fine precision.

关键词： Dynamic balance machine Principal axis of inertia Azimuth

Selective esterification of non-conjugated carboxylic acids in the presence of conjugated or aromatic carboxylic acids over active carbon supported methanesulfonic acid

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Science China Chemistry 2008年第10期51卷 990-992页

作者： FENG ZeWang zhao XinQi BI Hua School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Huaxi Technology Co. Ltd.Beijing 102206China

Non-conjugated carboxylic acids are selectively esterified in good yields in the presence of conjugated or aromatic carboxylic acids by stirring over active carbon supported methanesulfonic acid in di-chloromethane at... 详细信息

关键词： esters esterification conjugation catalysis carboxylic acids

Ultrahard X-ray multifunctional application beamline at the SSRF

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Nuclear Science and Techniques 2024年第6期35卷 14-25页

作者： Ke Yang zhao-Hui Dong Chun-Yin Zhou Zi-Long zhao Dong-Xu Liang Sai-Chao Cao Ai-Guo Li Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

The ultrahard X-ray multifunctional application beamline(BL12SW)is a phase-II beamline project at the Shanghai Syn-chrotron Radiation *** primary X-ray techniques used at the beamline are high-energy X-ray diffraction and imaging using white and monochromatic *** main scientific objectives of ultrahard X-ray beamlines are focused on two research *** is the study of the structural properties of Earth’s interior and new materials under extreme high-temperature and high-pressure conditions,and the other is the characterization of materials and processes in near-real service *** beamline utilizes a superconducting wiggler as the light source,with two diamond windows and SiC discs to filter out low-energy light(primarily below 30 keV)and a Cu filter assembly to control the thermal load entering the subsequent optical *** beamline is equipped with dual *** first was a meridional bending Laue monochromator cooled by liquid nitrogen,achieving a full-energy coverage of 30-162 *** second was a sagittal bending Laue monochromator installed in an external building,providing a focused beam in the horizontal direction with an energy range of 60-120 *** were four experimental hutches:two large-volume press experimental hutches(LVP1 and LVP2)and two engineering material experimental hutches(ENG1 and ENG2).Each hutch was equipped with various near-real service conditions to satisfy different *** example,LVP1 and LVP2 were equipped with a 200-ton DDIA press and a 2000-ton dual-mode(DDIA and Kawai)press,***1 and ENG2 provide in situ tensile,creep,and fatigue tests as well as high-temperature *** June 2023,the BL12SW has been in trial *** is expected to officially open to users by early 2024.

关键词： Shanghai Synchrotron Radiation Facility Ultrahard X-ray High energy diffraction High energy imaging Engineering materials Earth science

High frequency properties of Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9/Zn_(0.5)Ni_(0.5)Fe_2O_4 soft magnetic composite with micro-cellular structure

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Science China(Physics,Mechanics & Astronomy) 2012年第12期55卷 2392-2396页

作者： LIU Tong WANG MingGang zhao ZhanKui Key Laboratory of Advanced Structural Materials Ministry of EducationChangchun University of TechnologyChangchun 130012China

Soft magnetic composite with micro-cellular structure was prepared by spark plasma sintering(SPS) process with Fe73.5Cu1Nb3Si13.5B9 micron-powders clad by 5wt% Zn0.5Ni0.5Fe2O4 *** effect of SPS on the micro structure of the Finemet powder and the micro structure of the composite were *** has been found that the as-prepared composite consists of Fe73.5Cu1Nb3Si13.5B9 cells and the cell-wall composed of nano Zn0.5Ni0.5Fe2O4 particles distributing around Fe73.5Cu1Nb3Si13.5B9 *** composite exhibits low eddy-current loss which is to be resulted by high resistivity of the Zn0.5Ni0.5Fe2O4 *** sintered samples were annealed at different temperature and the magnetic properties at different frequency of the annealed samples were *** shows that the Zn0.5Ni0.5Fe2O4 cell-wall possesses good thermostability.

关键词： amorphous magnetic materials nanocrystalline materials magnetic annealing magnetic properties spark plasma sintering

Multiband Dynamics of Extended Harmonic Generation in Solids under Ultraviolet Injection

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Chinese Physics Letters 2022年第11期39卷 22-27页

作者： Yue Lang zhaoyang Peng Zengxiu zhao Department of Physics National University of Defense TechnologyChangsha 410073China

Using one-dimensional semiconductor Bloch equations,we investigate the multiband dynamics of electrons in a cutoff extension scheme employing an infrared pulse with additional UV *** extended three-step model is firstly validated to play a dominant role in emitting harmonics in the second ***,further analysis employing the acceleration theorem shows that,though harmonics in both the primary and secondary present positive and negative chirps,the positive(negative) chirp in the first region is related to the so-called short(long) trajectory,while that in the second region is emitted through ’general’ trajectory,where electrons tunneling earlier and recombining earlier contribute *** novel characteristics deepen the understanding of high harmonic generation in solids and may have great significance in attosecond science and reconstruction of band dispersion beyond the band edge.

关键词： harmonics solids acceleration

Subsequent placenta accreta after previous mifepristone-induced abortion: A case report

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World Journal of Clinical Cases 2021年第33期9卷 10244-10248页

作者： Peng zhao Ying zhao Jing He Xiao-Xia Bai Jian Chen Department of Obstetrics the Fourth Affiliated HospitalZhejiang University School of MedicineYiwu 322000Zhejiang ProvinceChina Department of Obstetrics Women’s HospitalZhejiang University School of MedicineHangzhou 310006Zhejiang ProvinceChina Department of Ultrasonography the Fourth Affiliated Hospital Zhejiang University School of MedicineYiwu 322000Zhejiang ProvinceChina

BACKGROUND Mifepristone-induced abortion(MIA)has been used worldwide to terminate ***,the association between placenta accrete(PA)and MIA has seldom been *** SUMMARY A 26-year-old pregnant woman presented with painless vaginal bleeding at 35 wk of *** had a medical abortion(mifepristone followed by misoprostol)1 year ago at the sixth week of *** personal history for previous surgery was *** ultrasonography showed a normal foetus with complete placenta *** foetal membrane ruptured with massive vaginal bleeding and severe abdominal *** emergency Caesarean section was performed,and the newborn was *** placenta failed to expel and manual extraction was carried out.A large defect was noted in the uterine fundus and repair of the uterine rupture was conducted *** postoperative pathology report showed placenta *** The evidence suggests a possible etiologic role of MIA in PA,as the incidence of PA after MIA is much higher than general *** of pregnancies are complicated by PA each year,some of which result in *** prevent subsequent placental complications after MIA,hormonal supplementation might be a promising therapeutic ***,further studies are needed to identify the high-risk factors and to confirm the effectiveness of estrogen supplement therapy.

关键词： Mifepristone-induced abortion Placenta accreta Uterine rupture Placental complications Hormonal supplementation Case report