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The Unconventional Influence of a Nearby Molecule onto Transport of Single C60 Molecule Transistor

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Chinese Physics Letters 2019年第12期36卷 62-66页

作者： Xiao Guo wen-jie Liang Beijing National Center for Condensed Matter Physics Bejjing Key Laboratory for Nanomaterials and NanodevicesInstitute of PhysicsChinese Academy of SciencesBeijing 100190 CAS Center of Excellence in Topological Quantum Computation and School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190 Songshan Lake Materials Laboratory Dongguan 523808

We study the transport property of single C60 molecular transistors with special focus on the situation that other molecules are in *** devices are prepared using electromigration and thermal deposition *** single C60 molecule transistors show typical coulomb blockade behavior at low *** we increase the coverage of molecules slightly by extending the deposition time,the transport spectrum of devices displays a switching behavior in the general coulomb blockade *** attribute this unconventional phenomenon to the influence from a nearby C60 *** analyzing this transport behavior quantitatively based on the parallel-double-quantum-dot model,the interaction from the nearby molecule is proved to be of capacity and tunneling *** stimulation is also applied to the device to investigate the effect of local charging environment variation on intermolecular interaction.

关键词： transport behavior tunneling

Adipose Rheb deficiency promotes miR-182-5p expression via the cAMP/PPARγsignaling pathway

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Journal of Genetics and Genomics 2023年第1期50卷 20-26页

作者： jie wen Jiangming Deng Ting Xiao Yu Liu wen Meng Department of Nephrology Hunan Key Laboratory of Kidney Disease and Blood PurificationThe Second Xiangya Hospital of Central South UniversityChangshaHunan 410011China Metabolic Syndrome Research Center The Second Xiangya Hospital of Central South UniversityChangshaHunan 410011China

Dysregulation of microRNAs(miRNAs)in adipocytes plays a critical role in the pathogenesis of ***,the signaling mechanisms regulating miRNAs production in adipose tissue remain largely ***,we show that adipose tissue-specific knockout of Ras homolog enriched in brain(Rheb),a direct upstream activator of mTOR,increases miR-182-5p level in mouse subcutaneous white adipose ***,the inhibition of mTOR signaling by rapamycin has no effect on miR-182-5p level in primary subcutaneous white adipocytes,suggesting the presence of a mTOR-independent mechanism regulating Rheb-mediated miR-182-5p *** with this view,Rheb-ablation activates the cAMP/PPARγsignaling *** addition,treatment of white adipocytes with pioglitazone,a PPARγagonist,dramatically upregulates miR-182-5p *** study reveals a unique mechanism by which Rheb regulates miR-182-5p in *** that increasing miR-182-5p in adipose tissue promotes beige fat development,our study also suggests a unique mechanism by which Rheb promotes thermogenesis and energy expenditure.

关键词： Rheb miR-182-5p White adipocytes cAMP/PPARγpathway Adipose tissue

Global stabilization control of stochastic quantum systems

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Science China(Information Sciences) 2016年第11期59卷 208-219页

作者： Shuang CONG jie wen Sen KUANG Fangfang MENG School of Information and Science Technology University of Science and Technology of China Department of Electronic Information and Electrical Engineering Hefei University

The global stabilization control of arbitrary eigenstates for finite dimensional stochastic quantum systems with non-diagonal free Hamiltonian and non-regular measurement operator is studied in this *** propose a switching feedback control law, in which a constant control is used to steer the system state to a convergence domain, and another control law designed based on Lyapunov stability theorem, is used to attract the states in the convergence domain to the desired target state. The convergence to an arbitrary target eigenstate from any initial state is strictly proved. Moreover, numerical simulation experiments on a three-dimensional stochastic quantum system are implemented to demonstrate the effectiveness of the proposed control.

关键词： eigenstate stochastic quantum systems global stabilization switching control Lyapunov stability theorem

Carbothermal reduction process of the Fe-Cr-O system

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International Journal of Minerals,Metallurgy and Materials 2013年第10期20卷 931-940页

作者： Yan-ling Zhang Yang Liu wen-jie Wei State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

Understanding the reduction behaviors and characteristics of the end products of Fe-Cr-O systems is very important not only for maximizing the recovery of metals from stainless steel dust but also for the subsequent reuse in metallurgical process. The present work first predicted the possible products thermodynamically when FeCr204 was reduced by C. The reduction behaviors by graphite of three kinds of Fe-Cr-O systems, i.e., FeCr204, Fe203q-Cr203, and Feq-Cr203, were then investigated in 1350-1550℃. Further, the microstructures of final products and element distribution conditions were examined. The results suggest that, thermodynamically, the mass of products for the carbothermal reduction of FeCr204 is a strong function of temperature, and the initial carbon content is used. More Fe-Cr-C solution and less residual carbon content are obtained at higher temperatures and lower no：no ratios （the initial molar ratio of C to O in the sample）. Experimental data show that the sample amount tends to affect the reduction rate, and the residual carbon content strongly depends on nc：no. With regard to the phases present in products during the reaction process, metal carbides tend to form in the initial stage, whereas Fe-Cr-C solution forms when the degree of reduction is sufficiently high.

关键词： stainless steel dust ternary systems carbothermal reduction reaction kinetics

Effect of rotor-mounted protrusion on sealing performance and flow structure in rotor-stator cavity

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Chinese Journal of Aeronautics 2018年第11期31卷 2057-2072页

作者： Nan CAO Xiang LUO Zeyu WU jie wen National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics School of Energy and Power EngineeringBeihang UniversityBeijing 100083China Collaborative Innovation Center for Advanced Aero-Engine Beijing 100083China

This paper presents an experimental investigation on the effect of protrusion radial position and height on the sealing performance and flow structure in the rotor-stator cavity. The rotormounted protrusions are assembled at three radial positions and are set to three heights. The cavity is equipped with three rim seals: a radial seal, an axial seal and a seal with double fins on the *** annulus Reynolds number is set at 4:39 ×10;and the rotational Reynolds number ranges from 7:51×10;to 1:20×10;. Heat and mass transfer analogy is applied. Pressure and CO;concentration are measured. The experimental results show that in cavities with different rim seals, radial distributions of the sealing efficiency, pressure and swirl ratio are basically the same. The sealing performance is improved by protrusions compared with the cavity without protrusion and improves with the increase of protrusion radial position and height. The effect of protrusion increases with the increase of the rotational Reynolds number. The windage loss and the flow resistance introduced by protrusions are investigated. It is found that induced windage loss and flow resistance decrease with the increase of protrusion radial position but increase with the protrusion height.

关键词： Height Protrusion Radial position Rim seal Sealing performance

Adaptive functional link network control of near-space vehicles with dynamical uncertainties

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Journal of Systems Engineering and Electronics 2010年第5期21卷 868-876页

作者： Yanli Du Qingxian Wu Changsheng Jiang jie wen College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 E R. China

The control law design for a near-space hypersonic vehicle（NHV） is highly challenging due to its inherent nonlinearity,plant uncertainties and sensitivity to *** paper presents a novel functional link network（FLN） control method for an NHV with dynamical thrust and parameter *** approach devises a new partially-feedback-functional-link-network（PFFLN） adaptive law and combines it with the nonlinear generalized predictive control（NGPC） *** PFFLN is employed for approximating uncertainties in *** weights are online tuned based on Lyapunov stability theorem for the first *** learning process does not need any offline training ***,a robust controller with an adaptive gain is designed to offset the approximation ***,simulation results show a satisfactory performance for the NHV attitude tracking,and also illustrate the controller＇s robustness.

关键词： adaptive control system dynamical uncertainties partially feedback functional link network near-space vehicle.

Cyclotron dynamics of a Bose—Einstein condensate in a quadruple-well potential with synthetic gauge fields

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Frontiers of physics 2021年第5期16卷 11-19页

作者： wen-Yuan Wang Ji Lin jie Liu Beijing Computational Science Research Center Beijing100193China Key Laboratory of Atomic and Molecular Physics&Functional Materials of Gansu Province College of Physics and Electronic EngineeringNorthwest Normal UniversityLanzhou730070China Department of Physics Zhejiang Normal UniversityJinhua321004China Graduate School of China Academy of Engineering Physics Beijing100193China HEDPS Center for Applied Physics and Technologyand College of EngineeringPeking UniversityBeijing100871China

We investigate the cyclotron dynamics of Bose-Einstein condensate(BEC)in a quadruple-well potential with synthetic gauge *** use laser-assisted tunneling to generate large tunable effective magnetic fields for *** mean position of BEC follows an orbit that simulated the cyclotron orbits of charged particles in a magnetic *** the absence of atomic interaction,atom dynamics may exhibit periodic or quasi-periodic cyclotron *** the presence of atomic interaction,the system may exhibit self-trapping,which depends on synthetic gauge fields and atomic interaction *** particular,the competition between synthetic gauge fields and atomic interaction leads to the generation of several discontinuous parameter windows for the transition to self-trapping,which is obviously different from that without synthetic gauge fields.

关键词： cyclotron dynamics Bose-Einstein condensate quadruple-well potential synthetic gauge fields

An efficient approach for continuous density queries

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Frontiers of Computer Science 2012年第5期6卷 581-595页

作者： jie wen Xiaofeng MENG Xing HAO Jianliang XU School of Information Renmin University of ChinaBeijing 100872China Department of Computer Science Hong Kong Baptist UniversityHong KongChina

In location-based services, a density query re- turns the regions with high concentrations of moving objects （MOs）. The use of density queries can help users identify crowded regions so as to avoid congestion. Most of the exist- ing methods try very hard to improve the accuracy of query results, but ignore query efficiency. However, response time is also an important concern in query processing and may have an impact on user experience. In order to address this issue, we present a new definition of continuous density queries. Our approach for processing continuous density queries is based on the new notion of a safe interval, using which the states of both dense and sparse regions are dynamically main- tained. Two indexing structures are also used to index candi- date regions for accelerating query processing and improving the quality of results. The efficiency and accuracy of our approach are shown through an experimental comparison with snapshot density queries.

关键词： continuous density queries safe interval query efficiency

Interaction of Mixed Porphyrin-polypyridyl Ru(II) Complex with Bovine Serum Albumin

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Chemical Research in Chinese Universities 2010年第5期26卷 693-698页

作者： XU Lei LIU Ya-nan MEI wen-jie HUANG Xiao-mei CHEN Tian-feng LIU jie ZHENG wen-jie Department of Chemistry Jinan University Guangzhou 510632 P. R. China School of Pharmacy Guangdong Pharmaceutical University Guangzhou 510006 P. R. China

The interactions of mixed porphyrin-polypyridyl Ru（Ⅱ） complexes [m（Py-3＇）TPP-Ru（phen）2Cl]^＋（1） and its derivatives [nim（Py-3＇）TPP-Ru（phen）2Cl]＋（2） and [Cum（Py-3＇）TPP-Ru（phen）2Cl]^＋（3）（phen=1,10-phenanthroline; m（Py-3＇）TPP=5-（3＇-pyridyl）-10,15,20-triphenylporphyrin） with bovine serum albumin（BSA） were investigated by fluorescence, UV-Vis and circular dichroism（CD） spectroscopies. The UV-Vis and CD spectral experiments indicated that the secondary structures of the protein were perturbed in the presence of the porphyrin Ru（Ⅱ） complex and the perturbation was enhanced under the irradiation with ultra-violet light. The fluorescence quenching mechanism of BSA by the three complexes was determined to be a static process, and the apparent binding constant K values for complexes 1, 2 and 3 measured by fluorescence quenching method were （3.86±0.03）×10^3 L/mol（n=0.94±0.04）, （5.69±0.04）× 103 L/mol（n=1.03±0.06）, and （6.54±0.02）× 10^3 L/mol（n=1.03±0.05）, respectively.

关键词： Porphyrin Bovine serum albumin(BSA) Ru(Ⅱ) complex Binding