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Thermo-field Dynamics of the Casimir Effect and Its Quantum Deformation

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Chinese Physics Letters 2001年第6期18卷 740-742页

作者： JING Hui XIE bing-Hao CHEN Jing-ling Theoretical Physics Division Nankai Institute of MathematicsNankai UniversityTianjin 300071 Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing 100088

The Casimir effect of the deformed cavity field at finite temperature is investigated by generalizing the thermo field dynamics formalism into q-deformed *** has been shown that the impact of q-deformation on the Casimir force only manifests in the finite temperature case and the expression for the ideal pure vacuum remains unchanged,which just coincides with the suggestions of Man’ko et al.[***.A 176(1993)173]about the nature of q-oscillators as the nonlinear vibrations of electromagnetic field.

关键词： field deformed Casimir

Thioredoxin pathway regulated live-cell synthesis of CdSe quantum dots in Saccharomyces cerevisiae

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Science China Chemistry 2024年第11期67卷 3851-3860页

作者： Xu Li Cai-Qin Wu Jia-Wei Tu Juan kong ling-ling Yang Zhi-Xiong Xie Dai-Wen Pang College of Chemistry and Molecular Sciences The Institute for Advanced StudiesCollege of Life SciencesWuhan UniversityWuhan 430072China Research Center for Analytical Sciences College of ChemistryState Key Laboratory of Medicinal Chemical BiologyTianjin Key Laboratory of Biosensing and Molecular RecognitionFrontiers Science Center for New Organic MatterFrontiers Science Center for Cell Responsesand Haihe Laboratory of Sustainable Chemical TransformationsNankai UniversityTianjin 300071China

Currently, the application of synthetic biology to artificially manipulate and utilize organisms for the synthesis of desired products such as nanomaterials with excellent fluorescence properties is attracting considerable attention. However, it is still difficult to obtain designed products efficiently due to insufficient knowledge of the biosynthetic mechanisms. The thioredoxin(TRX) and glutathione(GSH) pathways are generally conserved thiol-reductase systems that protect organisms from oxidative stress and are involved in selenium(Se) metabolism. In this study, we revealed the pivotal role of cytoplasmic TRX pathway in regulating the metabolism of Na_(2)SeO_(3) during the live-cell synthesis of cadmium-selenium quantum dots(Cd Se QDs) in Saccharomyces cerevisiae by regulating the expression level of genes related to TRX pathway and measuring the intracellular content of selenocysteine(Se Cys). The determination of Se Cys metabolism in yeast with GSH pathway-related genes deleted demonstrated that the TRX pathway played a more significant role in Se Cys metabolism than GSH pathway. A 6.4-fold enhancement in the synthetic yield of Cd Se QDs was achieved through the overexpression of TRX pathway-related genes,improvement of synthetic procedure, and supplementation of GSH based on the understanding of biological *** the mechanism of CdSe QDs live-cell synthesis facilitates the precise manipulation of biological processes for the synthesis of inorganic nanomaterials.

关键词： thioredoxin glutathione quantum dot live-cell synthesis selenium metabolism Saccharomyces cerevisiae

Biotransformation of 4-Hydroxybenzen Derivatives by Hairy Root Cultures of Polygonum multiflorum Thunb

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Journal of Integrative Plant Biology 2007年第2期49卷 207-212页

作者： Chun-Yan Yan Rong-Min Yu Zhang Zhang ling-Yi kong Department of Natural Medicinal Chemistry College of Traditional Chinese Medicines China Pharmaceutical University Nanjing 210038 China Department of Natural Medicinal Chemistry and Pharmacognosy College of Pharmacy Jinan University Guangzhou 510632 China

The biotransformation of four 4-hydroxybenzen derivatives （1,4-benzenediol （compound 1）, 4-hydroxybenzaldehyde （compound 2）, 4-hydroxybenzyl alcohol （compound 3） and 4-hydroxybenzoic acid （compound 4）） by the hairy root cultures of Polygonum multiflorum Thunb. as a new biocatalyst was investigated. It was found that the substrates were transformed to their corresponding glucosides, 4-hydroxyphenyl β-D-glucopyranoside （arbutin, compound la）, 4-hydroxymethylphenyl β-D-glucopyranoside （gastrodin, compounds 2a, 3a） and 4-carboxyphenyl α-D- glucopyranoside （compound 4a）, respectively. In the meantime, the hairy roots of P. multiflorum were able to stereoselectively and regioselectively glucosylate phenolic hydroxyl groups of compounds 1-4, but the cultures could not glucosylate the aldehyde group of compound 2 or the benzyllc hydroxyl group of compound 3, and no glucosyl esterification of carboxyl groups of compound 4 was detected. On the other hand, the result also showed that the hairy roots of P. multiflorum were able to reduce the 4-hydroxybenzaldehyde to its corresponding alcohol. This is the first report that substrate 4 has been converted into its α-D-glucopyranoside by a plant biotransformα- tion system.

关键词： 4-hydroxybenzen derivatives arbutin biotransformation gastrodin hairy root cultures Polygonum multiflorum.

Optimization of Light Field for Generation of Vortex Knot

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Chinese Physics Letters 2022年第10期39卷 17-21页

作者： Song Wang Lei Wang Furong Zhang ling-Jun kong Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China

The theory of knots and links focuses on the embedding mode of one or several closed curves in three-dimensional Euclidean *** an electromagnetic field system,all-optical knots or links composed of phase or polarization singularities have been verified theoretically and *** studies have shown that robust topological all-optical coding can be achieved by using optical knots and ***,in the current design of optical knots and links based on phase or polarization singularities,the amplitude of light between adjacent singularities is relatively *** brings great pressure to detection of optical knots and links and limits their ***,we propose a new optimization method in *** with the existing design methods,our design method improves the relative intensity distribution of light between adjacent *** verify the feasibility of our design results in *** study reduces the detection difficulty of optical knots and links,and has a positive significance for promotion of applications of optical knots and links.

关键词： polarization Vortex promotion

A diagnostic of the orbital spectrum of LS 5039 with Fermi-LAT

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Research in Astronomy and Astrophysics 2019年第12期19卷 281-286页

作者： Zhi Chang Shu Zhang Yu-Peng Chen Long Ji ling-Da kong Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBejjing 100049China University of Chinese Academy of Sciences Beijing 100049China Institut fur Astronomie und Astrophysik Kepler Center for Astro and Particle PhysicsEberhard Karls UniversitatSand 172076 TibingenGermany

LS 5039 is a well-known γ-ray binary system which consists of an unknown compact object and a massive companion O star. It shows rather stable emissions at high energies over years and hence serves as an ideal laboratory to investigate the emission mechanism for such peculiar systems which emit prominent γ-rays. To this end, we take the orbital phase resolved energy spectrum as observed by Fermi-LAT over 10 years. We divide the orbit into four orbital phases, each with an orbital phase range of 0.25,centered at 0.00, 0.25, 0.50 and 0.75 respectively, where the phase 0.0 is the periastron and phase 0.5 is the apastron. The phases around 0.25 and 0.75 are symmetric and hence are supposed to have identical local acceleration environment. The spectral analysis shows that the Fermi-LAT spectra are largely different from these two symmetric orbital phases: the emission from orbital phase 0.25 turns out to be significantly stronger than that from 0.75. This result does not fit a scenario that γ-rays are Doppler boosted emission from bow shock tails if LS 5039 has a shock configuration similar to PSR B1259-63, and indicates that the inverse Compton scatterings between the shock accelerated plasma and the stellar particle environment is the underline procedure. We also find that the previous report for a disappearance of the orbital modulation at 3–20 GeV is due to the similar spectral turn-over energies of the different orbital phases. The spectral properties of periastron and apastron regions are addressed in the context of the measurements in phase regions around 0.25 and 0.75.

关键词： binaries:general gamma rays:general

Military traumatic brain injury:a challenge straddling neurology and psychiatry

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Military Medical Research 2022年第6期9卷 686-704页

作者： ling-Zhuo kong Rui-Li Zhang Shao-Hua Hu Jian-Bo Lai Department of Psychiatry the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China the Key Laboratory of Mental Disorder's Management in Zhejiang Province Hangzhou 310003China Brain Research Institute of Zhejiang University Hangzhou 310003China Zhejiang Engineering Center for Mathematical Mental Health Hangzhou 310003China MOE Frontier Science Center for Brain Science and Brain-Machine Integration Zhejiang UniversityHangzhou 310003China

Military psychiatry, a new subcategory of psychiatry, has become an invaluable, intangible effect of the war. In this review, we begin by examining related military research, summarizing the related epidemiological data, neuropathology, and the research achievements of diagnosis and treatment technology, and discussing its comorbidity and sequelae. To date, advances in neuroimaging and molecular biology have greatly boosted the studies on military traumatic brain injury(TBI). In particular, in terms of pathophysiological mechanisms, several preclinical studies have identified abnormal protein accumulation, blood–brain barrier damage, and brain metabolism abnormalities involved in the development of TBI. As an important concept in the field of psychiatry, TBI is based on organic injury, which is largely different from many other mental disorders. Therefore, military TBI is both neuropathic and psychopathic, and is an emerging challenge at the intersection of neurology and psychiatry.

关键词： Shellshock Military Traumatic brain injury Diagnosis Treatment Comorbidity

Reaction behavior of MgO refractory with high-Mn and high-Al steel

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Journal of Iron and Steel Research International 2024年第6期31卷 1389-1398页

作者： ling-zhong kong Lin Zu Jie Yang Xi-min Zang Xin Yang Ming Kang School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051LiaoningChina

To understand the mechanism of the interfacial reaction between high-Mn and high-Al steel and MgO refractory,a series of laboratory experiments as well as thermodynamic calculations were *** effects of Mn and Al contents in the steel and the reaction time on the interfacial reaction were *** was observed that the erosion of the MgO refractory is caused by the reaction of Al and Mn in the steel with MgO in the refractory,which would lead to the formation of(Mn,Mg)O·Al_(2)O_(3) spinel and(Mn,Mg)O solid *** formation mechanism of the spinel and solid solution is as *** Al in the steel firstly reacts with MgO in the refractory to generate MgO·Al_(2)O_(3) spinel,and then,the spinel reacts with Mn in the steel to form(Mn,Mg)O·Al_(2)O_(3) ***,the MnO in the spinel reacts with the MgO in the inner refractory to form(Mn,Mg)O solid *** addition,only(Mn,Mg)O·Al_(2)O_(3) spinel is present in the interfacial reaction layer of the refractory when the Al content in the steel is sufficient.

关键词： High-Mn high-Al steel MgO refractory Reaction behavior Spinel

Improved Kalman filter method considering multiple factors and its application in landslide prediction

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Frontiers of Earth Science 2020年第3期14卷 625-636页

作者： Qing ling Wei Qu Qin Zhang lingjie kong Jing Zhang Li Zhu College of Geology Engineering and Geomatics Chang’an UniversityXi’an710064China School of Civil Engineering Lanzhou University of TechnologyLanzhou730050China Information Engineering University Zhengzhou450002China

Landslides,seriously threatening human lives and environmental safety,have become some of the most catastrophic natural disasters in hilly and mountainous areas ***,it is necessary to forecast landslide deformation for landslide risk *** paper presents a method of predicting landslide displacement,i.e.,the improved multi-factor Kalman filter(KF)*** developed model has two advantages over the traditional KF ***,it considers multiple external environmental factors(e.g.,rainfall),which are the main triggering factors that may induce slope ***,the model includes random disturbances of *** proposed model was constructed using a time series which consists of over 16-month of data on landslide movement and precipitation collected from the Miaodian loess landslide monitoring system and nearby meteorological stations in Shaanxi province,*** validation was performed by predicting movements for periods of up to 7 months in the *** performance of the developed model was compared with that of the improved single-factor KF,multi-factor KF,multi-factor radial basis function,and multi-factor support vector regression *** results show that the improved multi-factor KF method outperforms the other models and that the predictive capability can be improved by considering random disturbances of triggers.

关键词： landslide improved Kalman filter triggering factors displacement prediction

Deviation correction strategy for the earth pressure balance shield based on shield–soil interactions

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Frontiers of Mechanical Engineering 2022年第2期17卷 225-239页

作者： Liang TANG Xiangxun kong Xianzhang ling Yize ZHAO Wenchong TANG Yifan ZHANG School of Civil Engineering Harbin Institute of TechnologyHarbin 150090China Heilongjiang Research Center for Rail Transit Engineering in Cold Regions Harbin 150090China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401135China Department of Computer Science University of CaliforniaIrvineCA 92612USA

The control system presently used in shield posture rectification is based on driver experience,which is marginally *** study of the related theory is ***,a decision-making approach for the deviation correction trajectory and posture rectification load for an earth pressure balance(EPB)shield is proposed.A calculation model of posture rectification load of an EPB shield is developed by considering the interactions among the cutter head,shield shell,and *** additional position change during the shield attitude correction is *** posture rectification loads and shield behaviors results can be solved by the proposed *** influences of the stratum distribution(i.e.,bedrock height in the upper-soft and lower-hard strata)on shield behaviors and posture rectification loads are *** indicated that the increase of pitch angle in the upper-soft and lower-hard strata causes a sharp rise in vertical *** bedrock height increases the magnitudes of the required posture rectification moments when hr/D>*** a tunnel with hr/D≤0.5,the variation of hr/D has little effect on the posture rectification ***,the posture rectifying curves based on the theoretical model are compared with the target ones based on the double circular arc interpolation *** required results can be obtained regardless of the soil–rock compound stratum *** maximum rectification moment in the rock layer is almost 12.6 times that in the soil ***,this study provides a valuable reference for moment determination and the trajectory prediction of posture rectification in compound strata.

关键词： additional position change deviation correction trajectory earth pressure balance shield mechanical model posture rectification