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Six-day measurement of size-resolved indoor fluorescent bioaerosols of outdoor origin in an office

Particuology 2017年第2期15卷 161-169页

作者： yangyang Xie Oscar A. Fajardo Weizhuo yan bin zhao Jingkun Jiang Department of Building Science School of Architecture Tsinghua University Beijing 100084 China Beijing Key Laboratory oflndoorAir Quality Evaluation and Control Tsinghua University Beijing 100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China

Indoor airborne bioaerosols of outdoor origin play an important role in determining the exposure of humans to bioaerosols because people spend most of their time indoors. However, there are few studies focusing on indoor bioaerosols originating from outdoors. In this study, indoor versus outdoor size-resolved concentrations and particle asymmetry factors of airborne fluorescent bioaerosols in an office room were measured continuously for 6 days （144 h） using a fluorescent bioaerosol detector. The windows and door of this room were closed to ensure that there was only air infiltration; moreover, any human activities were ceased during sampling to inhibit effects of indoor sources. We focused on fine particles, since few coarse particles enter indoor environments, when windows and doors are closed. Both indoor and outdoor fluorescent bioaerosol size distributions were fit with two-mode lognormal distributions （indoor R2 = 0.935, outdoor R2 = 0.938）. Asymmetry factor distributions were also fit with lognormal distributions （indoor R2 = 0.992, outdoor R2 = 0.992）. Correlations between indoor and outdoor fluorescent bioaerosol concentrations show significant concentration-attenuation and a time lag during the study period. A two-parameter, semi-empirical model was used to predict concentrations of indoor fluorescent bioaerosols of outdoor origin. The measured and predicted concentrations had a linear relationship for the studied size fractions, with an R2 for all size fractions of larger than 0.83.

关键词： Fluorescent bioaerosols Indoor air Outdoor air Waveband integrated bioaerosol sensor(WIBS)Particle size distributions Concentrations

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Rockburst characteristics of several hard brittle rocks:A true triaxial experimental study

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第2期12卷 279-296页

作者： Shaobin Zhai Guoshao Su Shunde Yin bin zhao Liubin yan Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education School of Civil and Architecture EngineeringGuangxi UniversityNanning530004China Department of Civil and Environmental Engineering University of WaterlooWaterlooON N2L 3G1Canada State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu610059China

Rockburst is a typical rock failure which frequently threatens both human life and construction equipment during highly stressed underground *** lithology is a control factor of *** this paper,rockburst tests were conducted on rectangular prismatic specimens of six types of intact hard brittle rocks,***,granite,marble,basalt,sandstone and limestone,under one-free-face true triaxial loading *** the use of high-speed cameras,an acoustic emission(AE)system and a scanning electron microscope(SEM),rockburst of different rocks was *** results show that the strainbursts of granodiorite,granite and marble were accompanied by tensile splitting near the free face,and consequently were relatively strong with a large amount of fragment ejection and kinetic energy *** basalt,sandstone and limestone,failure was primarily dominated by shear *** strainbursts of basalt and sandstone were relatively small with minor fragment ejection and kinetic energy release;while no burst failure occurred on limestone due to its relatively low peak *** strength,fracturing and fragmentation characteristics,and failure modes of different rocks can significantly affect rockburst proneness and *** AE evolution coupled with SEM analysis reveals that the differences in the inhe rent microstructures and fracture evolution under loading are the primary factors accounting for different rockbursts in various rock types.

关键词： Rockburst Strainburst Hard brittle rocks True triaxial test Acoustic emission(AE)

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Correlation power analysis of DECIM～v2

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The Journal of China Universities of Posts and Telecommunications 2011年第5期18卷 118-123页

作者： JIA yan-yan HU Yu-pu zhao Yong-bin GAO Jun-tao Key Laboratory of Computer Networks and Information Security Xidian University Xi＇an 710071 China State Key Laboratory of Information Security Graduate University of Chinese Academy of Sciences Beijing 100049 China

Power analysis has been a powerful and thoroughly studied threat for implementations of block ciphers and public key algorithms but not yet for stream ciphers. Based on the consumed power differences between two neighboring clock cycles, this paper presents a correlation power analysis （CPA） attack on the synchronous stream cipher DECIM^v2 （the tweaked version of the original submission DECIM）. This attack resynchronizes the cryptographic device ceaselessly with many different initialization values （IVs） to obtain enough power traces. Then by modeling the statistical properties of the differential power traces with the correlation coefficients, the proposed attack algorithm can completely reveal the secret key of DECIM^v2. Furthermore, a simulation attack is mounted to confirm the validity of the algorithm. The results show that the entire secret key of DECIM^v2 can be restored within several minutes by performing 12 CPA attacks. It seems that there are still some defects in the design of DECIM^v2 and thus some further improvements should be made to resist the proposed attack.

关键词： cryptography cryptanalysis side channel attacks (SCA) CPA DECIM^v2

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Oxygen defects boost polysulfides immobilization and catalytic conversion:First-principles computational characterization and experimental design

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Nano Research 2020年第8期13卷 2299-2307页

作者： Qiu He bin Yu Huan Wang Masud Rana Xiaobin Liao yan zhao State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China Materials Engineering School of Mechanical and Mining EngineeringThe University of QueenslandSt LuciaQLD4072Australia The Institute of Technological Sciences Wuhan UniversityWuhan430072China

Although some experiments have shown that point defects in a cathode host material may enhance its performance for lithium-sulfur battery(LSB),the enhancement mechanism needs to be well investigated for the design of desired sulfur ***,the first principle density functional theory(DFT)is adopted to investigate a high-performance sulfur host material based on oxygen-defective TiO2(D-TiO2).The adsorption energy comparisons and Gibbs free energy analyses verify that D-TiO2 has relatively better performances than defect-free TiO2 in terms of anchoring effect and catalytic conversion of ***,D-TiO2 is capable of absorbing the most soluble and diffusive long-chain *** newly designed D-TiO2 composited with three-dimensional graphene aerogel(D-TiO2@Gr)has been shown to be an excellent sulfur host,maintaining a specific discharge capacity of 1,049.3 mAhg^−1 after 100 cycles at 1C with a sulfur loading of 3.2 mgcm^−*** with the sulfur mass loading increasing to 13.7 mgcm^−2,an impressive stable cycling is obtained with an initial areal capacity of 14.6 mAhcm^−2,confirming the effective enhancement of electrochemical performance by the oxygen *** DFT calculations shed lights on the enhancement mechanism of the oxygen defects and provide some guidance for designing advanced sulfur host materials.

关键词： oxygen defects catalytic conversion lithium-sulfur battery density functional theory

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Wave effect of gravitational waves intersected with a microlens field Ⅱ:An adaptive hierarchical tree algorithm and population study

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 241-254页

作者： Xikai Shan Guoliang Li Xuechun Chen Wen zhao bin Hu Shude Mao Department of Astronomy Tsinghua University Purple Mountain Observatory Chinese Academy of Sciences Institute for Frontier in Astronomy and Astrophysics Beijing Normal University School of Physics and Astronomy Beijing Normal University School of Astronomy and Space Science University of Science and Technology of China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of Astronomy University of Science and Technology of ChinaChinese Academy of Sciences

The gravitational lensing wave effect generated by a microlensing field embedded in a lens galaxy is an inevitable phenomenon in strong lensed gravitational waves （SLGWs）.This effect presents both challenges and opportunities for the detection and application of ***,investigating this wave effect requires computing a complete diffraction integral over each microlens in the *** is extremely time-consuming due to the large number of microlenses （10～3-10～6）.Therefore,simply adding all the microlenses is ***,the complexity of the time delay surface makes the lens plane resolution a crucial factor in controlling numerical *** this paper,we propose a trapezoid approximation-based adaptive hierarchical tree algorithm to meet the challenges of calculation speed and *** find that this algorithm accelerates the calculation by four orders of magnitude compared to the simple adding method and is one order of magnitude faster than the fixed hierarchical tree algorithm proposed for electromagnetic *** importantly,our algorithm ensures controllable numerical errors,increasing confidence in the *** with our previous work （***.66,239511,2023）,this paper addresses all numerical issues,including integral convergence,precision,and computational time1).Finally,we conducted a population study on the microlensing wave effect of SLGWs using this algorithm and found that the microlensing wave effect cannot be ignored,especially for Type II SLGWs （from saddle position of the time delay surface） due to their intrinsic geometric structures and their typical intersection with a denser microlensing ***,more than 33%（11%） of SLGWs have a mismatch larger than 1%（3%） compared to the unlensed ***,we found that the mismatch between signal pairs in a doubly imaged GW is generally larger than 10-3,and 61%（25%） of signal pairs have a mismatch larger than 1%（3%）.Therefo

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Study of thermal decoherence of harmonic oscillators

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原子与分子物理学报 2025年第5期42卷 108-114页

作者： LI Jian ZHOU Gao-Liang yan Zheng-Xin LIU Wei WANG zhao-Qi College of Science Xi’an University of Science and TechnologyXi’an 710054China

The thermal decoherence of harmonic oscillators is investigated *** quantum system presented here is a one-dimensional oscillator with angular frequency,which is surrounded by a thermal bath of environmental *** are various environmental oscillators with different angular frequency(below an ultraviolet cutoff).At the beginning,the quantum system is a pure state and the environmental oscillators are in thermodynamic equilibrium with *** a period,the system-environment interactions inspire significant decoherence of the quantum *** decoherence is displayed by explicit calculations of the purity and von Neumann entropy of the quantum *** is worth noting that the decoherence could be significant even in the weak coupling and low temperature case due to the large amount of environmental degrees of *** the decoherence process is inspired between the quantum system and an ordinary thermal environment here,the thermal decoherence result is quite general.

关键词： Quantum decoherence Grand canonical ensemble Oscillators

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兴城市龙王咀子地区花岗岩岩石地球化学、年代学特征及与铀成矿关系

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科学技术与工程 2022年第3期22卷 918-930页

作者：曲晓梅聂逢君严兆彬孟繁敏张成勇张鑫陈梦雅东华理工大学地球科学学院南昌330013 东华理工大学核资源与国家重点实验室南昌330000

龙王咀子位于青龙—锦西复杂构造带与西平坡—锦西壳断裂交叠部位,地处辽西重要的青龙—锦西铀金多金属成矿带的东段。通过对龙王咀子地区似斑状黑云母花岗岩进行岩相学、地球化学和锆石的U-Pb测年研究,岩石的成岩年龄为为燕山早期。样... 详细信息

龙王咀子位于青龙—锦西复杂构造带与西平坡—锦西壳断裂交叠部位,地处辽西重要的青龙—锦西铀金多金属成矿带的东段。通过对龙王咀子地区似斑状黑云母花岗岩进行岩相学、地球化学和锆石的U-Pb测年研究,岩石的成岩年龄为为燕山早期。样品具有过铝质特征为富硅过铝、钙碱性岩系列的高分异I型花岗岩。岩石的稀土总量高,轻稀土富集而重稀土亏损,轻重稀土分异较强,地球化学特征与华南产铀花岗岩地球化学特征相似,显示岩石有利于铀成矿。岩石强烈亏损Ba、Th、Sr、Zr和Nb,明显富集Rb、U、Pb。结合岩石的地球化学特征、成岩年龄以及区域构造演化,认为岩石形成于后碰撞造山的陆内环境,燕山期花岗岩的上侵是区域内铀矿化的主导因素。

关键词：龙王咀子青龙-锦西铀金成矿带似斑状黑云母花岗岩地球化学

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骨髓增生异常综合征患者淋巴细胞绝对值计数与地西他滨治疗反应的关系

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解放军医学杂志 2018年第3期43卷 239-243页

作者：庞艳彬赵松颖薛华郭慧敏化罗明范丽霞罗建民杜欣河北大学附属医院血液内科河北保定071000 河北医科大学第二医院血液内科石家庄050000 广东省人民医院/广东省医学科学院华南理工大学医学院第一临床医院血液内科广州510080

目的探计第1疗程地西他滨(DAC)治疗后骨髓增生异常综合征(MDS)患者淋巴细胞计数与患者对DAC治疗反应的关系。方法研究对象为2014年1月-2016年12月在河北大学附属医院血液科接受过DAC治疗的MDS和MDS继发的急性髓系白血病(AML)患者35例。... 详细信息

目的探计第1疗程地西他滨(DAC)治疗后骨髓增生异常综合征(MDS)患者淋巴细胞计数与患者对DAC治疗反应的关系。方法研究对象为2014年1月-2016年12月在河北大学附属医院血液科接受过DAC治疗的MDS和MDS继发的急性髓系白血病(AML)患者35例。根据第1个疗程DAC治疗后28~35d血常规中的淋巴细胞计数,将患者分为高淋巴细胞组(H-Lym组,淋巴细胞计数≥1.2×10~9/L)和低淋巴细胞组(L-Lym组,淋巴细胞计数0.05),两组基线资料中仅骨髓原始细胞≥10%的患者比例的差异有统计学意义(P0.05),而L-Lym组则明显低于诊断时的水平(P<0.05)。H-Lym组总反应率(80.0%)明显高于L-Lym组(40.0%),差异有统计学意义(P<0.05)。H-Lym组的中位PFS为10个月,L-Lym组为7.6个月,两组差异有统计学意义(P<0.05)。单因素分析结果显示,淋巴细胞计数绝对值低是MDS疾病进展的预后因素(P<0.05)。结论第1疗程DAC治疗后淋巴细胞计数≥1.2×10~9/L的患者具有较高的总反应率和较长的无进展生存期。

关键词：地西他滨骨髓增生异常综合征淋巴细胞无进展生存期

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Mechanism of cellobiose inhibition in cellulose hydrolysis by cellobiohydrolase

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Science China(Life Sciences) 2004年第1期47卷 18-24页

作者： zhao Yue WU bin yan Baixu GAO Peiji State Key Laboratory of Microbial Technology Shandong University Jinan 250100 China State Key Laboratory of Microbial Technology Shandong University Jinan 250100 China State Key Laboratory of Microbial Technology Shandong University Jinan 250100 China State Key Laboratory of Microbial Technology Shandong University Jinan 250100 China

An experimental study of cellobiose inhibition in cellulose hydrolysis by synergism of cellobiohydrolyse I and endoglucanase I is presented. Cellobiose is the structural unit of cellulose molecules and also the main product in enzymatic hydrolysis of cellulose. It has been identified that cellobiose can strongly inhibit hydrolysis reaction of cellulase, whereas it has no effect on the adsorption of cellulase on cellulose surface. The experimental data of FT-IR spectra, fluorescence spectrum and circular dichroism suggested that cellobiose can be combined with tryptophan residue located near the active site of cellobiohydrolase and then form steric hindrance, which prevents cellulose molecule chains from diffusing into active site of cellulase. In addition, the molecular conformation of cellobiohydrolase changes after cellobiose binding, which also causes most of the non-productive adsorption. Under these conditions, microfibrils cannot be separated from cellulose chains, thus further hydrolysis of cellulose can hardly proceed.

关键词： cellobiohydrolase, cellobiose, inhibition.

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南昌市湖水可溶解无机碳与碳同位素特征及其影响因素分析

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东华理工大学学报（自然科学版） 2012年第2期35卷 143-148页

作者：赖冬蓉严兆彬陈益平郭国林东华理工大学核资源与环境教育部重点实验室江西南昌330013

研究了南昌市内7个主要湖泊和赣江水体春秋季可溶解无机碳(DIC)浓度和碳同位素组成。结果表明,各湖泊水体可溶解无机碳浓度与碳同位素与赣江水体差别较大;湖泊水体DIC浓度春季高于秋季,而DIC碳同位素则相反,而赣江水体DIC浓度和碳同位... 详细信息

研究了南昌市内7个主要湖泊和赣江水体春秋季可溶解无机碳(DIC)浓度和碳同位素组成。结果表明,各湖泊水体可溶解无机碳浓度与碳同位素与赣江水体差别较大;湖泊水体DIC浓度春季高于秋季,而DIC碳同位素则相反,而赣江水体DIC浓度和碳同位素值几乎不随季节变化。南昌市湖泊内水生植物繁盛,而市内赣江段水体清澈,水生植物较少,反映湖泊水体中DIC浓度和碳同位素组成受水生植物的影响,而赣江水体DIC浓度与碳同位素组成更多取决于水体与大气中CO2的收支平衡。

关键词：湖泊可溶解无机碳碳同位素南昌

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