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Information Entropy Squeezing for a Atom in Mode-Mode Competition System

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Communications in Theoretical Physics 2008年第12期50卷 1411-1416页

作者： WU Qin FANG Mao-Fa LI Shao-Xin LI Ying HU yao-Hua School of Basic Medical Science Guangdong Medical College Dongguan 523808 China College of Physics and Information Science Hunan Normal University Changsha 410081 China

The entropy squeezing properties for a two-level atom interacting with a two-mode field via two differentcompeting transitions are investigated from a quantum information point of *** influences of the initial state of thesystem and the relative coupling strength between the atom and the field on the atomic information entropy squeezingare *** results show that the squeezed direction and the frequency of the information entropy squeezing canbe controlled by choosing the phase of the atom dipole and the relative competing strength of atom-field,*** find that,under the same condition,no atomic variance squeezing is predicted from the HUR while optimal entropysqueezing is obtained from the EUR,so the quantum information entropy is a remarkable precision measure for theatomic squeezing in the considered system.

关键词： mode-mode competition model information entropy squeezing variance squeezing information entropy uncertainty relation

Tribological performance of organic cadmium compound as lubricant additive

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中国有色金属学会会刊：英文版 2004年第z1期14卷 374-378页

作者： HU Jian-qiang XIE Feng ZHU Huan-qin ZHEN Fa-zheng yao Jun-bing Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China First Department Aviation Oil Research Institute Beijing 100000 China

The oil-soluble cadmium dipropyldithiophosphate additive was synthesized. A four-ball tester was used to evaluate the tribological performance of the additive in a mineral oil under different loads and lubricant grease synthesized compared with some commercial additives. The results show that it exhibits excellent antiwear and load-carrying capacities and is better than other additives. The surface analytical tools such as scanning electron microscope (SEM) with energy dispersive X-ray (EDX), X-ray photoelectron spectrometer (XPS) were used to investigate the topography, the compositions, and chemical states of some typical elements on the rubbing surface of worn *** and light topography of worn scar further confirms that the additive shows good antiwear capacities. The results of EDX and XPS analyses indicate that tribochemical mixed protective films consisting of atomic cadmium, sulphides, sulphates and phosphates are formed on the rubbing surface, which contribute to improving the tribological properties of lubricant and grease. Particularly, the soft cadmium film formed plays an important role in improving antiwear properties of oils. Finally, antiwear mechanism of the additive and formation scheme of atomic cadmium was proposed.

关键词： cadmium dipropyldithiophosphate additive extreme pressure antiwear mechanism

Transgenic restorer rice line T1c-19 with stacked cry1C*/bar genes has low weediness potential without selection pressure

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Journal of Integrative Agriculture 2016年第5期15卷 1046-1058页

作者： HUANG yao LI Ji-kun QIANG Sheng DAI Wei-min SONG Xiao-ling Weed Research Lab Nanjing Agricultural University

Stacked（insect and herbicide resistant） transgenic rice T1c-19 with cry1C＊/bar genes, its receptor rice Minghui 63（herein MH63） and a local two-line hybrid indica rice Fengliangyou Xiang 1（used as a control） were compared for agronomic performance under field conditions without the relevant selection pressures. Agronomic traits（plant height, tiller number, and aboveground dry biomass）, reproductive ability（pollen viability, panicle length, and filled grain number of main panicles, seed set, and grain yield）, and weediness characteristics（seed shattering, seed overwintering ability, and volunteer seedling recruitment） were used to assess the potential weediness without selection pressure of stacked transgene rice T1c-19. In wet direct-seeded and transplanted rice fields, T1c-19 and its receptor MH63 performed similarly regarding vegetative growth and reproductive ability, but both of them were significantly inferior to the control. T1c-19 did not display weed characteristics; it had weak overwintering ability, low seed shattering and failed to establish volunteers. Exogenous insect and herbicide resistance genes did not confer competitive advantage to transgenic rice T1c-19 grown in the field without the relevant selection pressures.

关键词： stacked transgenic rice T1c-19 agronomic traits reproductive ability weediness

Numerical study on wake characteristics of high-speed trains

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Acta Mechanica Sinica 2013年第6期29卷 811-822页

作者： Shuan-Bao yao Zhen-Xu Sun Di-Long Guo Da-Wei Chen Guo-Wei Yang Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsCAS CSR Qingdao Sifang Locomotive Co.Ltd.

Intensive turbulence exists in the wakes of high speed trains, and the aerodynamic performance of the trailing car could deteriorate rapidly due to complicated features of the vortices in the wake zone. As a result, the safety and amenity of high speed trains would face a great challenge. This paper considers mainly the mechanism of vortex formation and evolution in the train flow field. A real CRH2 model is studied, with a leading car, a middle car and a trailing car included. Different running speeds and cross wind conditions are considered, and the approaches of un- steady Reynold-averaged Navier-Stokes （URANS） and de- tached eddy simulation （DES） are utilized, respectively. Re- suits reveal that DES has better capability of capturing small eddies compared to URANS. However, for large eddies, the effects of two approaches are almost the same. In conditions without cross winds, two large vortex streets stretch from the train nose and interact strongly with each other in the wake zone. With the reinforcement of the ground, a complicated wake vortex system generates and becomes strengthened as the running speed increases. However, the locations of flow separations on the train surface and the separation mechanism keep unchanged. In conditions with cross winds, three large vortices develop along the leeward side of the train, among which the weakest one has no obvious influence on the wake flow while the other two stretch to the tail of the train and combine with the helical vortices in the train wake. Thus, optimization of the aerodynamic performance of the trailing car should be aiming at reducing the intensity of the wake vortex system.

关键词： Wake flow structures URANS DES High speed trains

SUPPRESSION OF CELL ADHESION ON POLYACRYLONITRILE-BASED MEMBRANES BY THE ANCHORING OF PHOSPHOLIPID MOIETIES

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Chinese Journal of Polymer Science 2006年第1期24卷 103-106页

作者： Xiao-jun Huang Xiao-dan Huang Ai-fu Che Zhi-kang Xu Ke yao Institute of Polymer Science Zhejiang University Hangzhou 310027China Medical College Zhejiang University Hangzhou 310027 China

In this work, the membrane surface of poly（acrylonitrile-co-2-hydroxyethyl methacrylate）（PANCHEMA） was chemically modified by anchoring of phospholipid moieties. The process involved the reaction of hydroxyl groups on the membrane surface with 2-chloro-2-oxo-1,3,2-dioxaphospholane （COP） followed by the ring-opening reaction of COP with trimethylamine. Chemical differences between the original and the modified membranes were characterized by FT-IR and XPS, It was found that the amount of macrophage adhered on the modified membrane surface is substantially lower than that on polyacrylonitrile （PAN） and PANCHEMA membranes under the same condition, The morphological change of the adherent cell is also suppressed by the generation ofphospholipid moieties on the membrane surface.

关键词： Acrylonitrile copolymer Membrane Surface modification Phospholipid moieties Cell adhesion.

Au-catalysed free-standing wurtzite structured InAs nanosheets grown by molecular beam epitaxy

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Nano Research 2019年第11期12卷 2718-2722页

作者： Qiang Sun Han Gao Xiaomei yao Kun Zheng Pingping Chen Wei Lu Jin Zou Materias Engineering The University of Queensland St LuciaQLD 4072Australia State Key Laboratory for Infrared Physics Shanghai Institute of Techrical PlhysicsChinese Acadenry of Sciences500 Yutian RoadShanghai 200083China University of Chinese Academy of Sciences No.19A Yuquan RoadBeijing 100049China Institute of Microstructure and Properties of Advanced Materials Beijing University of TechnologyBeijing 100124China Centre for Microscopy and Microanalysis The University of QueenslandSt LuciaQLD 4072 Alustraia

In this study,we report the growth of free-standing InAs nanosheets using Au catalysts in molecular beam *** structural characterizations suggest that wurtzite structured InAs nanosheets,with features of extensive{1120}surfaces,grown along thedirection and adopted{0001}nanosheet/catalyst interfaces,are initiated from wurtzite structured[0001]nanowires as the inclined epitaxial growth due to relatively higher In concentrations in Au catalysts,and grown from these inclined nanostructures through catalyst-induced axial growth and their enhanced lateral growth under the high growth *** on the facts that the nanosheets contain large low energy{1120}surfaces and{0001}nanosheet/catalyst interfaces,the growth of our nanosheets is a thermodynamically driven *** study provides new insights into fabricating free-standing Ⅲ-Ⅴ nanosheets for their applications in future nanoscale devices.

关键词： InAs nanosheet wurtzite structure catalyst supersaturation molecular beam epitaxy

Metabolomic profiles in a green alga (Raphidocelis subcapitata) following erythromycin treatment: ABC transporters and energy metabolism

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Journal of Environmental Sciences 2023年第2期124卷 591-601页

作者： Jiezhang Mo Zhihua Ma Shiwei Yan Napo KM Cheung Fangshe Yang Xiunan yao Jiahua Guo Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity College of Urban and Environmental SciencesNorthwest UniversityXi’an 710127China State Key Laboratory of Marine Pollution and Department of Chemistry City University of Hong KongKowloonHong KongChina

A recent study showed that erythromycin(ERY)exposure caused hormesis in a model alga(Raphidocelis subcapitata)where the growth was promoted at an environmentally realistic concentration(4μg/L)but inhibited at two higher concentrations(80 and 120μg/L),associated with opposite actions of certain signaling pathways(e.g.,xenobiotic metabolism,DNA replication).However,these transcriptional alterations remain to be investigated and verified at the metabolomic *** study uncovered metabolomic profiles and detailed toxic mechanisms of ERY in *** using *** analysis showed that metabolomic pathways including ABC transporters,fatty acid biosynthesis and purine metabolism were associated with growth promotion in algae treated with 4μg/L *** overcompensation was possibly activated by the low level of ERY in algae where more resources were reallocated to efficiently restore the temporary impairments,ultimately leading to the outperformance of *** contrast,algal growth inhibition in the 80 and 120μg/L ERY treatments was likely attributed to the dysfunction of metabolomic pathways related to ABC transporters,energy metabolism and metabolism of *** from binding of ERY to the 50S subunit of ribosomes to inhibit protein translation as in bacteria,the data presented here indicate that inhibition of protein translation and growth performance of algae by ERY may also result from the suppression of amino acid biosynthesis and aminoacyl-tRNA *** study provides novel insights into the dose-dependent toxicity of ERY on ***.

关键词： Hormesis Metabolome ABC transporters DNA replication Microalgae Macrolide antibiotic

Numerical Simulation of Fractal Agglomerating-Growth of Al_2O_3Inclusions in Tundish

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Journal of Iron and Steel Research International 2013年第11期20卷 7-12页

作者： GUO Luo-fang LI Hong LING Hai-tao WANG yao SONG Wen-chen State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

Based on the Al2O3 inclusion analysis of low-carbon aluminum killed steel in tundish of a domestic steel company and fractal theory analysis, a mathematical model of fractal agglomerating growth of Al2O3 inclusions in tundish was established. The results indicated that： large swirl flows exist in both sides of inlet, space between weir and dam, and large zone above outlet, in which monomer and agglomerated inclusion particles accumulate easily; the agglomerated inclusions with hydrodynamic diameter of 6-9.8 μm were quickly generated less than 16 s, but those inclusions with hydrodynamic diameter more than 11 μm were difficult to form; the number density of agglomerated inclusion rapidly increased first, then slowly reduced, so the form and quantity distribution of agglomerated inclu sions can be controlled by controlling the residence time of inclusion particles in tundish.

关键词： tundish fractat theory agglomerating growth fractal dimension

Phase Transition and Critical Phenomenon Occurring in Granular Matter

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Chinese Physics Letters 2019年第9期36卷 32-35页

作者： yao-Dong Feng Tao Su Qing-Fan Shi Gang Sun Department of Physics Beijing Institute of TechnologyBe让ing 100081 Beijing Key Laboratory for Nanomaterials and Nanodevices Institute of PhysicsChinese Academy of SciencesBe让ing 100190 School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190

We investigate the granular flow states in a channel with bottleneck by molecular dynamics *** study is restricted only on a selected key area rather than on the whole system to focus on the flow properties of a single granular state.A random force field is introduced to control the granular *** is also pointed out that the flow rate in the granular flow can be correlated with the pressure,which leads us to carry out a comprehensive study similar to the classical study for general liquid-gas phase *** results show that the dilute flow state and the dense flow state of the granules are similar to the gas state and the liquid state of general substances,respectively,and the properties of phase transition and critical phenomenon are also similar to those occurring in general substances.

关键词： simulation Phase Transition and Critical Phenomenon Occurring in Granular Matter