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Prospective Roles of Scanning Photoelectrochemical Microscopy in Microbial Hybrid Photosynthesis

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Chinese Journal of Chemistry 2022年第24期40卷 3013-3016页

作者： Xiaochun tian Rui bai Feng Zhao CAS Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamenFujian361021 China

Microbial hybrid photosynthesis has attracted great interests in recent years since it integrates the advantages of natural and artificial photosynthesis for solar-to-chemical conversion. Coupling a light source with scanning electrochemical microscopy, scanning photoelectrochemical microscopy (SPECM) shows great potential in investigating the interfacial reactions of microbial hybrid photosynthesis. In this Emerging Topic, the potential roles of SPECM in revealing biotic–abiotic interfacial electron transfer mechanisms and calculating electrode process kinetics are proposed for hybrid photosynthesis, and this will also inspire the applications of SPECM in the fields including biomineralization, photocatalytic-biodegradation and microbial photoelectrochemical systems.

关键词： Electron transfer Interfaces Photosynthesis Scanning electrochemical microscopy Scanning photoelectrochemical microscopy Semi-artificial photosynthesis

A MICROMECHANICAL FRAMEWORK WITH AGGREGATE-MASTIC INTERFACE EFFECT FOR PREDICTING UNIAXIAL COMPRESSION CREEP OF ASPHALT MIXTURE

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Acta Mechanica Solida Sinica 2014年第3期27卷 306-314页

作者： jun Wu Xinhua Yang Fan bai Department of Mechanics Huazhong University of Science and Technology

According to the elastic-viscoelastic correspondence principle, an elastic microme- chanical framework taking the inclusion-matrix interface effect into account is extended for predicting viscoelastic properties of asphalt mixture, which is simply treated as elastic coarse aggregate inclusions periodically and isotropically embedded in a viscoelastic asphalt mastic matrix. The Burgers model is adopted for characterizing the matrix mechanical behavior, so that the homogenized relaxation modulus of asphalt mixture in compression creep is derived. After a series of uniaxial compression creep tests are performed on asphalt mastic in different temperature and stress conditions in order to determine the matrix constitutive parameters, the framework presented is validated by comparison with the experiment, and then some predictions of uniaxial compression creep behavior of asphalt mixture in different temperature and stress conditions are given.

关键词： asphalt mixture micromechanics elastic-viscoelastic correspondence principle compression creep

Widen the Zero-Voltage-Switching Range and Secure Grid Power Quality for An EV Charger Using Variable-Switching-Frequency Single-Dual-Phase-Shift Control

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Chinese Journal of Electrical Engineering 2018年第1期4卷 11-19页

作者： Qi tian Kevin(Hua)bai University of Michigan-Dearborn USA

Compared to conventional electrical-vehicle(EV)on-board chargers utilizing a front-end Power-Factor-Correction(PFC)+an isolated DC/DC converter,which limits the wall-to-battery efficiency to~94%,a new control strategy using variable switching frequency(VSF)and variable phase shifts frees the PFC stage thereby getting rid of the DC link capacitor and further increasing the system efficiency and power *** challenge is to secure zero-voltage-switching(ZVS)turn-on for all switches within the full-power *** this paper a novel VSF single-dual-phase-shift(SDPS)control strategy is proposed,which consists of three control freedoms,i.e.,two phase shifts and one variable switching frequency to secure ZVS and achieve PFC *** boundaries are pictured and compared among single-phase-shift(SPS),dual-phase-shift(DPS)and the proposed single-dual-phase-shift(SDPS)*** results and experimental validation through a level-2 EV on-board charger indicate that by using the proposed SDPS control,both ZVS and PFC are secured not only for the heavy load but also for the light load,without sacrificing the system efficiency.

关键词： Dual-active-bridge phase-shift control zero-voltage-switching power-factor-correction

Warming magnitude of Indonesian Throughflow during the penultimate deglaciation (Termination Ⅱ) and its relationship with climate change in high-latitude regions

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Chinese Science Bulletin 2010年第32期55卷 3709-3717页

作者： tian CuiCui tian jun State Key Laboratory of Marine Geology Tongji University Shanghai 200092 China

The tropical oceans are important source areas for global heat and water vapor transport,and changes in tropical sea surface temperature (SST) will have important impacts on high-latitude and global climate change. It is crucial to establish the precise phase relationship between tropical and high-latitude climate variability to gain insight into the mechanisms of global climate change. Here,we present multi-proxy records across the penultimate deglaciation (Termination Ⅱ) from sediment Core SO18459,which is located in the outflow area of the Indonesian Throughflow (ITF) of the Timor Sea. These proxy records include planktonic and benthic foraminifera δ 18O,planktonic foraminifera G. ruber Mg/Ca-derived SST,and δ18Ow of sea surface water. The Mg/Ca-SST records indicate a warming of 4.1°C in the Timor Sea over Termination Ⅱ,which is in phase with decrease in planktonic and benthic δ18O. Our results suggest that at millennial timescales,climate change of the tropical oceans is synchronous with high-latitude ice volume changes. Furthermore,warming of the Timor Sea is almost simultaneous with warming of the Antarctic,suggesting a rapid heat transfer from the tropics to the Antarctic via the atmosphere and/or ocean circulations. The G. ruber δ18O and SST records of Core SO18459 show a marked YD-like event during Termination Ⅱ,which is probably caused by decrease in Australian rainfall or strengthening of the Western Pacific Warm Pool. However,a similar YD-like event is not observed in East Asian rainfall records. This discrepancy indicates that different tropical climate systems may have different responses to the same forcing,such as El Nio Southern Oscillation. A similar YD-like event is observed in the global benthic foraminiferal δ18O records during Termination Ⅱ,implying teleconnection of millennial scale climate change between the tropical regions and high latitudes.

关键词：印度尼西亚贯穿流高纬度地区气候变暖冰消期倒数全球气候变化热带海洋底栖有孔虫

Superfluid λ transition in charged AdS black holes

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Science China(Physics,Mechanics & Astronomy) 2023年第12期66卷 29-36页

作者： Ning-Chen bai Lei Li jun Tao Center for Theoretical Physics College of PhysicsSichuan UniversityChengdu 610065China School of Physics and Electronic Engineering Sichuan University of Science and EngineeringYibin 643000China

We observe a superfluid λ transition in the P-V criticality of charged Ad S black holes,within a holographic extended thermodynamics that considers the variation of Newton’s constant *** calculate the critical exponents and find that they coincide with those of a superfluid transition in liquid4He and the Bose-Einstein condensation of hard-sphere Bose ***,the independence of entropy and thermodynamic volume in the holographic framework allows us to construct a well-defined Ruppeiner *** associated scalar curvature suggests that the black holes show similar microscopic interactions with the hard-sphere Bose gas,where the superfluid(condensed)phase is dominated by repulsive interactions,while the normal(gas)phase is dominated by attractive *** findings might provide us with new insights into the quantum aspect of charged Ad S black holes.

关键词： black hole thermodynamics holography superfluid phase transition Ruppeiner geometry

The growth rate of hepatocellular carcinoma is different with different TNM stages at diagnosis

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Hepatobiliary & Pancreatic Diseases International 2021年第4期20卷 330-336页

作者： tian-Ming Gao Dou-Sheng bai Jian-jun Qian Chi Zhang Sheng-Jie Jin Guo-Qing Jiang Department of Hepatobiliary Surgery Clinical Medical CollegeYangzhou UniversityYangzhou 225001China Department of Hepatobiliary Surgery The Second Clinical CollegeDalian Medical UniversityDalian 116023China

Background: Hepatocellular carcinoma(HCC) progresses fast and has a poor prognosis, but the growth rate in different TNM stages is not clear. The present study was to estimate the growth rate of HCC with different TNM stages at diagnosis. Methods: Baseline demographics and tumor characteristics were analyzed for 10145 patients in Surveillance, Epidemiology, and End Results(SEER) Program-registered HCC. Multiple linear regression models were used for age adjustment with patient race, sex, marital status, and HCC grade. Results: The age at diagnosis was younger in Caucasians and males. The adjusted average age of patients with stage I HCC was 65.26 years. The adjusted age of patients with stage II, IIIA, IIIB, and IIIC was-0.17,-0.25,-0.29, and-0.55 adjusted-year younger compared with patients with stage I HCC(all P < 0.001). The adjusted average age of patients with T1 was 65.26 years. The age adjustment was-0.17,-0.26, and-0.55 respectively(all P < 0.001) for T2, T3 or T4 tumors without distant metastases. Conclusions: These findings demonstrated that the more advanced the HCC stage at diagnosis, the younger the age at diagnosis and the faster the HCC growth from tumor occurrence.

关键词： Hepatocellular carcinoma Growth rate TNM stage SEER

Dissipation of Nonlinear Wave in Inhomogeneous Dust Plasma Crystal

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Communications in Theoretical Physics 2009年第11期52卷 941-944页

作者： FENG tian-jun Department of Physics Lanzhou Jiao Tong University Lanzhou 730070 China

A Korteweg-de Vires-type （KdV-type） equation and a modified Nonlinear Schrodinger equation （NLSE） for the dust lattice wave （DLW） are derived in a weakly inhomogeneous dust plasma crystal. It seems that the amplitude and the velocity of the dust lattice solitary waves decay exponentiaJly with increasing time in a dust lattice. The modulational instability of this dust lattice envelope waves is investigated as well. It is found that the waves are modulational stable under certain conditions. On the other hand, the waves are modulationaJ unstable if the conditions are not satisfied.

关键词： reductive perturbation method dust lattice wave

The hardest transition metal nitride predicted from machine learning

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Science Bulletin 2018年第15期63卷 947-948页

作者： Yong, jun tian Center for High Pressure Science. State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qiahuangdaa 066004 China

Materials that possess Vickers hardness(Hv)higher than 40 GPa are known as superhard materials,which have important applications in industry and scientific ***,there are only two types of superhard materials,*** and cubic boron nitride(c-BN),which are widely used as cutting,polishing,drilling and coating *** diamond has unrivaled hardness of 60–120 GPa,its applications in some circumstances,such as cutting ferrous materials,are limited due to poor

关键词：金属氮化物机器学习涂层材料预言科学研究

Determination of aniline in environmental water samples by alternating-current oscillopolarographic titration

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Chinese Chemical Letters 2007年第6期18卷 730-733页

作者： jun Ping Xiao Qing Xiang Zhou Xiao Ke tian Hua Hua bai Xian Fa Su Department of Chemistry University of Science and Technology Beijing Beijing 100083 China School of Chemistry and Environmental Sciences Henan Normal University Henan Key Laboratory for Environmental Pollution Control Xinxiang 453007 China

A new method for the determination of aniline in environmental water based on oscillopolarographic titration was presented in this paper. Several factors including the kind, concentration, and volume of acid, the dosage of potassium bromide, the temperature and concentration of concomitant substances were investigated in detail. The experimental results indicated that this method was simple, rapid, and sensitive. The linear range was 8.367 × 10(?4) to 2.789 × 10(?2) mol L(?1), the relative standard deviation (R.S.D.) was lower than 0.96%, and the spiked recoveries of aniline in environmental water samples were in the range of 99.4–106.9% under the optimal conditions. The results indicated that the present method could be used as an alternative method for aniline determination in realworld water samples.

关键词： Alternating-current oscillopolarographic titration Aniline Potassium bromide