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Study of spatial resolution of the associated alpha particle imaging–time-of-flight method

Nuclear Science and Techniques 2019年第4期30卷 105-113页

作者： Meng Huang jian-yu zhu Jun Wu Center for Strategic Studies China Academy of Engineering Physics

Associated alpha particle imaging based on the time-of-flight(API-TOF) technique is an advanced neutron analysis method, which is capable of discriminating material nuclides and three-dimensional imaging of the spatial distribution of material nuclei. In this paper, the spatial resolution of API-TOF and its effects are studied using mathematical analysis and Monte Carlo numerical simulation. The results can provide guidance and assist in designing of API-TOF detection devices. First, a mathematical analysis of the imaging principles of the API-TOF was carried out, and the calculation formulas of the spatial resolution of API-TOF were deduced. Next, the relationship between the device layout and the spatial resolution of the API-TOF detection device was studied. The concept of a typical API-TOF detection device with an optimized structure was proposed. Then, the spatial distribution of the spatial resolution of the typical API-TOF detection device was analyzed, and the effects of the time resolution and the neutron emission angle resolution on the spatial resolution were studied. The results show that spatial resolutions better than 1 cm can be achieved by improving the time resolution and the neutron emission angle resolution to appropriate levels. Finally, a Monte Carlo numerical simulation program was developed for the study of the APITOF and was used to calculate the spatial resolutions of the API-TOF. The comparison of the results shows that thespatial resolutions calculated based on the Monte Carlo numerical simulation are in good agreement with those calculated based on the mathematical analysis. This verifies the mathematical analysis and the evaluation of the effects of the spatial resolution of the API-TOF in this study.

关键词： API-TOF Spatial resolution Mathematical analysis Monte Carlo numerical simulation

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Synthesis and Characterization of Aluminum Doped Nano-ZrO_2 by Surfactant-assisted Route

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Chinese Journal of Structural Chemistry 2006年第5期25卷 552-556页

作者： HU Sheng-Wei yu jian-Chang zhu Si-En College of Material Science and Engineering Fuzhou University Fuzhou 350002 China

Recently, more and more interest has been focused on zirconia and its characteristics. In this paper, aluminum can be successfully incorporated into nano-ZrO2 via a cationic surfactant assisted route in the earlier preparation procedure. XRD, TEM, EDS, Uv-vis and N2 adsorption-desorption analysis methods were adopted for the characterization of prepared samples. The results show that aluminum has been homogeneously incorporated into nano-ZrO2. The prepared aluminum-doped samples show a distinctive blue shift in the Uv-vis spectra compared to normal nano-ZrO2. The distinctive increase of thermal stability and a mesoporous structure were observed.

关键词： nano-ZrO2 aluminum incorporation characterization

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Element analysis method of concealed explosive based on TNA

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Nuclear Science and Techniques 2019年第1期30卷 19-25页

作者： Meng Huang jian-yu zhu Jun Wu Rui Li Institute of Applied Physics and Computational Mathematics Center for Strategic Studies China Academy of Engineering Physics Software Center for High Performance Numerical Simulation China Academy of Engineering Physics

The detection technology of concealed bulk explosives is related to social security and national defense construction and has important research significance. In this paper, an element analysis method of concealed explosives based on thermal neutron analysis is *** method could provide better reconstruction precision for hydrogen, carbon, and nitrogen ratios, making it possible to discriminate explosives from other compounds with the same elements but different proportions, as well as to identify the types of concealed bulk explosives. In this paper, the basic principles and mathematical model of this method are first introduced, and the calculation formula of the element number ratio(the ratio between the nucleus numbers of two different elements) of the concealed explosive is deduced. Second, a numerical simulation platform of this method was established based on the Monte Carlo JMCT code. By calibrating the absorption efficiencies of the explosive device to c rays, the element number ratios of a concealed explosive model under the irradiation of thermal neutrons were reconstructed from the neutron capture prompt c-ray spectrum. The reconstruction values were in good agreement with the actual values,which shows that this method has a high reconstruction precision of the element number ratio for concealed explosives. Lastly, it was demonstrated using the simulation study that this method can discriminate explosives,drugs, and common materials, with the capability of determining the existence of concealed bulk explosives and identifying explosive types.

关键词： Concealed bulk explosive Explosive type identification TNA Element number ratio

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A rare case of type 1 leprosy reactions following tetanus infection in a borderline tuberculoid leprosy patient and a literature review

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Infectious Diseases of Poverty 2018年第1期7卷 566-569页

作者： Chao Shi Zhi-Chun Jing De-Gang Yang jian-yu zhu Department of Leprosy Shanghai Dermatology HospitalNo.1278 Bao De Road200443 ShanghaiPeople’s Republic of China Department of Therapy Shanghai Dermatology HospitalNo.1278 Bao De Road200443 ShanghaiPeople’s Republic of China

Background:Type 1 leprosy reaction,also known as“reversal reaction”,is related to cellular immune responses to Mycobacterium leprae *** risk factors that trigger type 1 leprosy reactions are poorly *** with concurrent tetanus is rare,and there are no publicly available reports of a leprosy patient infected with tetanus that induced type 1 leprosy *** presentation:A 56-year-old Chinese Han female presented to our hospital with symptoms of erythematous plaques and pain over her left upper limb for 2 days and foreign object sensation in her throat for 3 *** patient had a 6-year history of *** 1 leprosy reactions were initially considered,followed by treatment with *** days later,the patient’s symptoms were aggravated,with neck muscle tension and difficulty in opening her mouth,and the erythematous plaques had spread over most of her left upper *** further careful examinations,we confirmed the diagnosis of tetanus with concurrent type 1 leprosy *** patient was given anti-tetanus treatment for 12 days and anti-leprosy reaction treatment for 4 months;the diseases were eventually ***:This report suggests that tetanus infection may be a trigger for type 1 leprosy reactions.

关键词： Type 1 leprosy reactions Tetanus Trigger

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High ratio of illegitimate visitation by small bees severely weakens the potential function of heteranthery

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Journal of Plant Ecology 2015年第2期8卷 213-223页

作者： Jiao-Kun Li yun-Peng Song Hui Xu Yan-Wen Zhang jian-yu zhu Lu-Lu Tang School of Minerals Processing and Bioengineering Central South UniversityNo.932South lushan RoadChangsha 410083China School of Metallurgy and Environment Central South UniversityNo.932South lushan RoadChangsha 410083China School of Life Sciences Central South UniversityNo.172Tongzipo RoadChangsha 410013China Department of Biology Changchun Normal UniversityNo.3291North Changji RoadChangchun 130032China

Aims in heterantherous plants,‘division of labor’among structurally dif-ferent stamens,*** and feeding functions,has been thought to reduce the evolutionary conflict of relying on pollen both as the carrier of male gametes and as the food for *** key to successful division of labor among different sets of stamens is the size match between stamens and legitimate pollinators,which results in the precise deposition of pollen onto specific locations on pollinator’s body and facilitates cross ***,the potential impact of small illegitimate insects that are ubiquitous dur-ing the pollination process on the plant reproduction in heteranth-erous species has been largely neglected in previous studies and never been demonstrated *** Here,we investigated the functions of three different types of sta-mens in Commelina *** pollinator visitation,pollen removal and deposition were compared among flowers with dif-ferent types of anthers emasculated at two natural ***,the mating systems of *** in wild populations were estimated using microsatellite *** Findingsour data showed that the main floral visitors for *** at the two studied populations were small illegitimate bees rather than legitimate pollinators,accounting for 77.5 and 92.2%of total flower visits,*** manipulations in *** demon-strated that the two types of brightly yellow stamens separately func-tioned as‘deceptive attraction’and‘feeding’*** the brown inconspicuous stamens of *** with the largest amount of fertile pollen had the potential function in offering pollen for cross pollination,the high ratio of illegitimate visitation by small bees significantly affected the dispersal and deposition of pollen from the pollinating anthers,and subsequently decreased the levels of outcrossing(tm=0.23-0.32)in wild *** work further confirmed that the size match betwe

关键词： Commelina communis division of labor heteranthery illegitimate visitation mating system

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Derivative Geometric Modeling of Basic Rotational Solids on CATIA

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Computer Aided Drafting,Design and Manufacturing 2011年第1期21卷 22-27页

作者： MENG Xiang-bao PAN Zi-jian zhu yu-xiang LI Jun College of Mechanical Science and Engineering Jilin University Changchun 130025 China

Hybrid models derived from rotational solids like cylinders, cones and spheres were implemented on CATIA software. Firstly, make the isosceles triangular prism, cuboid, cylinder, cone, sphere, and the prism with tangent conic and curved triangle ends, the cuboid with tangent cylindrical and curved rectangle ends, the cylinder with tangent spherical and curved circular ends as the basic Boolean deference units to the primary cylinders, cones and spheres on symmetrical and some critical geometric conditions, forming a series of variant solid models. Secondly, make the deference units above as the basic union units to the main cylinders, cones, and spheres accordingly, forming another set of solid models. Thirdly, make the tangent ends of union units into oblique conic, cylindrical, or with revolved triangular pyramid, quarterly cylinder and annulus ends on sketch based features to the main cylinders, cones, and spheres repeatedly, thus forming still another set of solid models. It is expected that these derivative models be beneficial both in the structure design, hybrid modeling, and finite element analysis of engineering components and in comprehensive training of spatial configuration of engineering graphics.

关键词： geometric modeling derivative solids of revolution industrial and conceptualdesign engineering graphics CATIA application

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Acidithiobacillus ferrooxidans enhanced heavy metals immobilization efficiency in acidic aqueous system through bio-mediated coprecipitation

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Transactions of Nonferrous Metals Society of China 2017年第5期27卷 1156-1164页

作者： Min GAN Ming-ming LI jian ZENG Xin-xing LIU jian-yu zhu yue-hua HU Guan-zhou QIU School of Minerals Processing and Bioengineering Central South University Changsha 410083 China

This study investigated the promotion effect of *** on complex heavy metals coprecipitation *** significantly enhanced the ferrous oxidation,which also promoted the formation of ***(II)concentration reduced to0.058mmol/L in *** inoculated system,and Cd also reduced to the lowest concentration(0.085mmol/L).Pb was mainly immobilized as anglesite and iron-oxyhydroxysulphate promoted the removal of remanent Pb in *** precipitates are characterized by XRD,SEM,and FTIR *** main component of the iron-oxyhydroxysulphate was well crystallized *** contributed to the formation of schwertmannite in later monovalent cation lack *** ferrous iron oxidation rate and Fe(III)supply rate in *** inoculated system facilitated polyhedron crystal formation and the increase of particle *** heavy metals could be incorporated into iron oxyhydroxysulphate crystal,and efficiently removed from acidic wastewater through *** mediated coprecipitation.

关键词： coprecipitation Acidithiobacillus ferrooxidans complex heavy metals iron-oxyhydroxysulphate acidic water

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Resistance of Cement-based Grouting Materials with Nano- SiO_(2) Emulsion to Chloride Ion Penetration

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 114-119页

作者： LI Shuiping CHENG jian WEI Chao yuAN Bin yu Chengxiao College of Architectural Science and Engineering Yangzhou UniversityYangzhou 225127China

The chloride penetration resistance of cement-based grout materials was improved by nano-silica *** of mixtures containing different nano-silica particles or emulsions were exposed in sodium chloride solutions of specific concentrations with different test *** properties of the mixes were assessed in terms of weight loss and compressive strength.X-ray diffraction(XRD)and scanning electron microscopy(SEM)of mixes were performed to analysis the phase evolution and *** results demonstrated that the introduction of nano-SiO_(2) emulsion significantly decreased the compressive strength loss and calcium hydroxide(CH)crystal content of hydration production,and then enhanced the resistance of cement-based grouting materials to chloride ion *** improvement derives from the filling and pozzolanic effects of nano-SiO_(2) particles,which were incorporated via an emulsion and attributed to a well dispersion in grouting matrix.

关键词： grouting materials nano-SiO_(2)emulsion chloride ion penetration,weight loss strength loss

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A new horizon for neuroscience:terahertz biotechnology in brain research

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Neural Regeneration Research 2025年第2期20卷 309-325页

作者： Zhengping Pu yu Wu Zhongjie zhu Hongwei Zhao Donghong Cui Shanghai Key Laboratory of Psychotic Disorders Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Department of Psychiatry Kangci Hospital of JiaxingTongxiangZhejiang ProvinceChina Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghaiChina Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of ScienceShanghaiChina National Facility for Protein Science in Shanghai Shanghai Advanced Research InstituteChinese Academy of SciencesShanghaiChina

Terahertz biotechnology has been increasingly applied in various biomedical fields and has especially shown great potential for application in brain *** this article,we review the development of terahertz biotechnology and its applications in the field of *** evidence indicates promising prospects for the use of terahertz spectroscopy and terahertz imaging techniques in the diagnosis of amyloid disease,cerebrovascular disease,glioma,psychiatric disease,traumatic brain injury,and myelin *** vitro and animal experiments have also demonstrated the potential therapeutic value of terahertz technology in some neuropsychiatric *** the precise underlying mechanism of the interactions between terahertz electromagnetic waves and the biosystem is not yet fully understood,the research progress in this field shows great potential for biomedical noninvasive diagnostic and therapeutic ***,the biosafety of terahertz radiation requires further exploration regarding its two-sided efficacy in practical *** review demonstrates that terahertz biotechnology has the potential to be a promising method in the field of neuropsychiatry based on its unique advantages.

关键词： biological effect brain neuron neuropsychiatry neuroscience non-thermal effect terahertz imaging terahertz radiation terahertz spectroscopy terahertz technology

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Ideal Bi‑Based Hybrid Anode Material for Ultrafast Charging of Sodium‑Ion Batteries at Extremely Low Temperatures

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Nano-Micro Letters 2025年第3期17卷 152-167页

作者： Jie Bai jian Hui Jia yu Wang Chun Cheng Yang Qing jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022People’s Republic of China

Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at−20°C or ***,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely ***,a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock *** a hybrid shows an unprecedented rate performance(237.9 mAh g^(−1)at 2 A g^(−1))at−60℃,outperforming all reported SIB anode *** with a Na_(3)V_(2)(PO_(4))_(3)cathode,the energy density of the full cell can reach to 181.9 Wh kg^(−1)at−40°*** on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

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