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Effects of light emitting diode lights on plant growth,development and traits a meta-analysis

Horticultural Plant Journal 2021年第6期7卷 552-564页

作者： Yuanchun Ma An xu Zong-Ming(Max)Cheng College of Horticulture Nanjing Agricultural UniversityNanjingJiangsu 210095China Department of Plant Sciences University of TennesseeKnoxvilleTN 37996United States

The various monochromatic Light Emitting Diode(LED)lights are widely used in growth facility for cultivating various plants,particularly horticultural crops because of their higher luminous efficiency,lower radiation and power consumption than the traditional white fluorescent lamp ***,considerable inconsistent effects have been reported in *** conducted a meta-analysis to assess the effects of different colors of LED light on plant growth,development and various *** to the light from white fluorescent lamps,the red LED light significantly changed 4 out 26 plant characteristics by at least 37%,and blue LED light significantly increased 5 of 26 assessed characteristics by 37%or *** combination of red/blue LED lights only significantly increased dry weight by 161%among 25 plant characteristics *** to the white LED light,red LED light significantly decreased 2 of 9 plant characteristics by at least 36%,and blue LED light significantly decreased only 1 of 9 plant characteristics,total chlorophyll content,by 42%.In the moderators analyzed,plant taxonomic families significantly influenced the effects of LED lights on shoot dry weight,and plant life cycles and plant taxonomic families significantly affected the effect on stomatal *** systematic meta-analysis,we found that the effect of LED on plant growth and quality traits was speciesspecific,and the effect was affected by the cultivation ***,we suggest that researchers be more targeted to experiment,and collect traits associated with practical production,especially related to the quality of product data,such as carotenoids,anthocyanin and other antioxidant *** article is to provide more data with practical application,guide the application of LED in horticultural plant factory.

关键词： LED Plant development Meta-analysis

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Tighter sum uncertainty relations via(α,β,γ)weighted wigner–Yanase–Dyson skew information

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Communications in Theoretical Physics 2024年第3期76卷 91-99页

作者： Cong xu Zhaoqi wu Shao-Ming Fei School of Mathematical Sciences Capital Normal UniversityBeijing 100048China Department of Mathematics Nanchang UniversityNanchang 330031China Max-Planck-Institute for Mathematics in the Sciences 04103 LeipzigGermany

we establish tighter uncertainty relations for arbitrary finite observables via(α,β,γ)weighted wigner–Yanase–Dyson((α,β,γ)wwYD)skew *** results are also applicable to the(α,γ)weighted wigner–Yanase–Dyson((α,γ)wwYD)skew information and the weighted wigner–Yanase–Dyson(wwYD)skew *** also present tighter lower bounds for quantum channels and unitary channels via(α,β,γ)modified weighted wigner–Yanase–Dyson((α,β,γ)MwwYD)skew *** examples are provided to illustrate the tightness of our uncertainty relations.

关键词： quantum channels (α,β,γ)wwYD skew information (α,β,γ)MwwYD skew information uncertainty relations

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Nucleate pool boiling heat transfer measurements of HFC23/CFC13 system

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Journal of Thermal Science 2007年第4期16卷 370-375页

作者： Liqiang ZHANG Maoqiong GONG Jianfeng wU Lie xu Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai 200030 China Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100080 China

Nucleate pool boiling heat transfer data of the HFC23/CFC13 system have been systematically measured in a wide range of pressures and heat fluxes. The experimental results are also compared with the measured data of R508A and R508B. It is found that the heat transfer coefficient of R503 （HFC23/CFC13=0.511/0.489） is higher than that of R508A and R508B. Furthermore, the measured data were compared with the predicted results with three well-known correlations. Correlation by Fujita and Tsutsui can provide acceptable results. Most of the data fall within ±20% of this correlation.

关键词： heat transfer pool boiling azeotropic system refrigerant mixtures.

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商业数据不正当竞争法律规制研究

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科技与法律（中英文） 2025年第1期 46-56页

作者：徐春成丁妙染西北农林科技大学人文社会发展学院陕西杨凌712100

商业数据作为新型生产要素,在商业竞争中发挥着举足轻重的作用。商业数据利用中的不正当竞争会损害消费者和经营者的利益,破坏市场竞争秩序。目前商业数据不正当竞争高发,其行为方式多样,且性质独特,难以用物权、知识产权等法律规则予... 详细信息

商业数据作为新型生产要素,在商业竞争中发挥着举足轻重的作用。商业数据利用中的不正当竞争会损害消费者和经营者的利益,破坏市场竞争秩序。目前商业数据不正当竞争高发,其行为方式多样,且性质独特,难以用物权、知识产权等法律规则予以合理规制。因此,需要合理设计法律规则对之加以调整,促进市场良性竞争。文章首先从阐述商业数据不正当竞争行为的表现形式及判断标准和规制商业数据不正当竞争行为的意义着手,分析商业数据不正当竞争行为既有法律规制方案的现存问题,如《反不正当竞争法(修订草案征求意见稿)》“商业数据专条”设计的构成要件不清晰、损害后果僵化、兜底条款容易导致向一般条款逃避、商业数据不正当竞争行为认定困难、行政监管乏力等。其次针对这些问题尝试提出规制商业数据不正当竞争行为的建议,如保持立法的“谦抑性”、明晰商业数据不正当竞争行为认定的相关制度、完善商业数据专条、明晰行政监管权限及建立诉前止损机制。以期通过以上几个具体的规制建议,规范企业经营人员的公平竞争活动,为我国快速发展的数字经济运用科学的法律规制模式提供理论支撑。

关键词：商业数据不正当竞争行为法律规制数据安全数字经济

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Petrophysical parameters inversion for heavy oil reservoir based on a laboratory-calibrated frequency-variant rock-physics model

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Petroleum Science 2023年第6期20卷 3400-3410页

作者： xu Han Shang-xu wang Zheng-Yu-Cheng Zhang Hao-Jie Liu Guo-Hua wei Gen-Yang Tang CNPC key Laboratory of Geophysical Prospecting China University of Petroleum(Beijing)Beijing102249China Engineering Research Center of the Ministry of Education for Exploration and Development of Complex Oil and Gas Reservoirs China University of Petroleum(Beijing)Beijing102249China Shengli Oilfield Geophysical Exploration Research Institute SinopecDongying257000ShandongChina

Heavy oil has high density and viscosity, and exhibits viscoelasticity. Gassmann's theory is not suitable for materials saturated with viscoelastic fluids. Directly applying such model leads to unreliable results for seismic inversion of heavy oil reservoir. To describe the viscoelastic behavior of heavy oil, we modeled the elastic properties of heavy oil with varying viscosity and frequency using the Cole-Cole-Maxwell (CCM) model. Then, we used a CCoherent Potential Approximation (CPA) instead of the Gassmann equations to account for the fluid effect, by extending the single-phase fluid condition to two-phase fluid (heavy oil and water) condition, so that partial saturation of heavy oil can be considered. This rock physics model establishes the relationship between the elastic modulus of reservoir rock and viscosity, frequency and saturation. The viscosity of the heavy oil and the elastic moduli and porosity of typical reservoir rock samples were measured in laboratory, which were used for calibration of the rock physics model. The well-calibrated frequency-variant CPA model was applied to the prediction of the P- and S-wave velocities in the seismic frequency range (1–100 Hz) and the inversion of petrophysical parameters for a heavy oil reservoir. The pre-stack inversion results of elastic parameters are improved compared with those results using the CPA model in the sonic logging frequency (∼10 kHz), or conventional rock physics model such as the xu-Payne model. In addition, the inversion of the porosity of the reservoir was conducted with the simulated annealing method, and the result fits reasonably well with the logging curve and depicts the location of the heavy oil reservoir on the time slice. The application of the laboratory-calibrated CPA model provides better results with the velocity dispersion correction, suggesting the important role of accurate frequency dependent rock physics models in the seismic prediction of heavy oil reservoirs.

关键词： Heavy oil Rock physics Velocity dispersion Pre-stack inversion Reservoir prediction

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Photophysical and electrical properties of organic waveguide nanorods of perylene-3,4,9,10-tetracarboxylic dianhydride

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Nano Research 2016年第7期9卷 1948-1955页

作者： Yuyan Han wei Ning Liang Cao Xiaotao xu Tian Li Fapei Zhang Li Pi Faqiang xu Mingliang Tian High Magnetic Field Laboratory Chinese Academy of Sciences Hefei 230031 China National Synchrotron Radiation Laboratory University of Science and Technology of China 42 Hezuohua Road Hefei 230029 China Hefei Science Center Chinese Academy of Sciences Hefei 230031 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

The single crystalline nanostructure of organic semiconductors provides a very promising class of materials for applications in modern optoelectronic devices. However, morphology control and optoelectronic property modulation of high quality single crystalline samples remain a challenge. Here, we report the morphology-controlled growth of single crystalline nanorod arrays of perylene- 3,4,9,10-tetracarboxylic dianhydride （IrFCDA）. we demonstrate that, unlike FTCDA film, PTCDA nanorods exhibits optical waveguide features, enhanced absorption, and Frenkel excitation emission in the visible region. Additionally, we measured the electrical properties of PTCDA nanorods, including the conductivity along the growth direction of the nanorod, which is roughly 0.61 S-m i （much higher than that of pure crystalline PTCDA films）.

关键词： organic semiconductor single crystalline nanorod optical waveguide photoluminescence electrical conductivity

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Fault diagnosis model based on multi-manifold learning and PSO-SVM for machinery

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仪器仪表学报 2014年第S2期35卷 210-214页

作者： wang Hongjun xu Xiaoli Rosen B G key Laboratory of Modern Measurement & Control Technology Beijing Information Science & Technology University School of Mechanic and Electric Engineering Beijing Information Science&Technology University Halmstad University

Fault diagnosis technology plays an important role in the industries due to the emergency fault of a machine could bring the heavy lost for the people and the company. A fault diagnosis model based on multi-manifold learning and particle swarm optimization support vector machine(PSO-SVM) is studied. This fault diagnosis model is used for a rolling bearing experimental of three kinds faults. The results are verified that this model based on multi-manifold learning and PSO-SVM is good at the fault sensitive features acquisition with effective accuracy.

关键词： fault diagnosis multi-manifold learning particle swarm optimization support vector machine

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Effects of grain boundaries on irradiation-induced defects in tungsten by molecular dynamics simulations

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Journal of Iron and Steel Research International 2018年第2期25卷 200-206页

作者： Hong Li Yuan Qin wei Cui Man Yao xu-dong wang Hai-xuan xu Simon R.Phillpot School of Materials Science and Engineering Dalian University of TechnologyDalian 116024LiaoningChina Department of Materials Science and Engineering University of TennesseeKnoxvilleTN 37996USA Department of Materials Science and Engineering University of FloridaGainesvilleFL 32611USA

The effects of two different symmetric tilt grain boundaries （GBs）, ∑13[001]（230） GB and ∑17[001]（140） GB, on displacement cascade processes in tungsten were investigated using molecular dynamics simulations. By quantifying the number of interstitials and vacancies surviving after irradiation with the kinetic energy of primary knock-on atom energies of 1, 3 and 5 keV, respectively, in these simulations, it is found that the GBs have dual nature for radiation-induced defects： They absorb interstitials while leaving more vacancies to survive in the grains. The net effect is that the number of total surviving defects in the GB system is not always less than that in the single crystal. These defect behaviors are understood by quantitatively analyzing the recovery fraction of irradiation-induced defects, the time to reach steady state and the mobility of vacancies and interstitials. It is also found that the ∑17 GB is a more effective sink of radiation-induced point defects than the ∑13 GB. One of the main reasons is that the ∑17 GB has a higher GB energy.

关键词： Tungsten Damage cascade Molecular dynamics Grain boundary Irradiation-induced defect

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The modification toward excited-state dynamics and catalytic activity by isomeric Au_(44)clusters

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Nano Research 2023年第8期16卷 11383-11388页

作者： Tongxin Song Jie kong Shisi Tang Xiao Cai xu Liu Meng Zhou wen wu xu weiping Ding Yan Zhu School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China School of Physical Science and Technology Ningbo UniversityNingbo 315211China

The structure determination of metal nanoclusters protected by ligands is critical in understanding their physical and chemical properties,yet it remains elusive how the metal core and ligand of metal clusters cooperatively contribute to the observed ***,with the successful synthesis of Au_(44)TBPA_(22)Cl_(2)cluster(TBPA=4-tert-butylphenylacetylene),the structural isomer of previously reported Au_(44)L_(28)clusters(L denoted as ligand)is filled,thereby providing an opportunity to explore the property evolution rules imparted by different metal core structures or different surface ***-resolved transient absorption spectroscopy reveals that the difference in the core structure between Au_(44)TBPA_(22)Cl_(2)and Au_(44)L_(28)can bring nearly 360 times variation of excited-state lifetime,while only 3–24 times differences in excited-state lifetimes of the three Au_(44)L_(28)nanoclusters with identical metal core but different ligands are observed,which is due to much stronger impact of the metal core than the surface ligands in the electronic energy bands of the *** addition,the Au_(44)clusters protected by alkyne ligands are shown to be highly effective toward the electrochemical oxidation of ethanol,compared to the Au_(44)clusters capped by thiolates,which is ascribed to smaller charge transfer impedance of the former *** anticipate that the study will enhance the process in controlling the nanomaterial properties by precisely tailoring metal core or surface patterns.

关键词： cluster metal core surface ligand excited-state dynamics catalysis

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Local Brand Smoking Among Adult Smokers:Findings from the wave 5 International Tobacco Control China Survey--China,2015

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China CDC weekly 2022年第21期4卷 452-459,I0002页

作者： Peter Hao Steve Shaowei xu Haiyen Sung Tingting Yao Yuan Jiang Anne C.k.Quah Geoffrey T.Fong Chinese Center for Disease Control and Prevention BeijingChina University of waterloo WaterlooOntarioCanada Institute for Health&Aging School of NursingUniversity of California at San FranciscoSan FranciscoCAUSA Center for Tobacco Control Research and Education University of California at San FranciscoSan FranciscoCaliforniaUSA Tobacco Control Office Chinese Center for Disease Control and PreventionBeijingChina Ontario Institute for Cancer Research TorontoOntarioCanada.

Summary what is already known about this topic?Branding of cigarettes may play a role in shaping the smoking behaviors of Chinese smokers,and local brand(LB)cigarettes may reflect this influence because of greater tax and non-tax incentives compared to *** of these brands are regional flagships that market to smokers using local landmarks or *** is added by this report?LB brands were significantly more likely to be the usual brand of smokers residing in provincial-level administrative divisions(PLADs)that produced their own LB cigarettes[adjusted odds ratio(AOR):30.95;95%confidence interval(CI):26.36–36.49]compared to those residing in PLADs that had non-local ventures with non-LB ***,smokers residing in urban areas were found to be less likely to smoke LB cigarettes(AOR:0.79;95%CI:0.67–0.93)compared to those in rural *** are the implications for public health practice?These findings suggest that LB smoking may be a result of industry-driven incentives to boost LB sales,fueled by such as supply-side strategies to boost LB sales or targeted cultural/social marketing that appeals to certain demographic *** addressing these incentives to support LBs would be challenging given the nature of China’s tobacco industry,doing so would have potential to reduce cigarette smoking and ultimately the health burden of smoking in China.

关键词： venture smoke likely

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