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Coherent-driving-assisted quantum speedup in Markovian channels

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Chinese Physics B 2021年第2期30卷 176-184页

作者： Xiang Lu ying-jie zhang Yun-jie Xia Shandong Provincial Key Laboratory of Laser Polarization and Information Technology Department of PhysicsQufu Normal UniversityQufu 273165China

As is well known,the quantum evolution speed of quantum state can never be accelerated in the Markovian regime without any operators on the *** Hamiltonian corrections induced by the action of coherent driving forces are often used to fight dissipative and decoherence mechanisms in *** this reason,considering three noisy channels(the phase-flip channel,the amplitude damping channel and the depolarizing channel),we propose a scheme of speedup evolution of an open system by controlling an external unitary coherent driving operator on the *** is shown that,in the presence of the coherent driving,no-speedup evolution can be transformed into quantum speedup evolution in the Markovian dynamics ***,under the fixed coherent driving strength in the above three noisy channels,the best way to achieve the most degree of quantum speedup for the system has been acquired by rotating the system with appropriate driving direction angles,***,we conclude that the reason for this acceleration is not the nonMarkovian dynamical behavior of the system but due to the oscillation of geometric distance between the initial state and the target final state.

关键词： quantum dynamics control quantum speed limit Markovian dynamics

EXPERIMENTAL RESEARCH ON THE SHAPE CHARACTERS OF NATURAL AND VENTILATED SUPERCAVITATION

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Journal of Hydrodynamics 2007年第5期19卷 564-571页

作者： zhang Xue-wei WEI ying-jie zhang Jia-zhong WANG Cong YU Kai-ping School of Astronautics Harbin Institute of Technology Harbin 150001 China

A series of projectile and water-tunnel experiments were conducted to investigate the shape characters of natural and ventilated supercavitation. It was found that the shape and dimensions of both the natural supercavitation and the ventilated supercavitation are similar through the comparison of them when the cavitation number is small and equal, and the contour of both the natural supercavitation and the ventilated supercavitation can be calculated effectively with the Savchenko formula. The gravity effect can induce the asymmetry of ventilated supercavitation, and the asymmetry is more apparent as the Froude number is smaller. The empirical formula for calculating the axial deformation of ventilated supercavitation was corrected and expanded based on experiment data. The evolution rules of both the natural supercavitation and the ventilated supercavitation were described, and the vortex frequency of natural cavitation was obtained. In addition, the hysteretic aspect was observed between the development and the fall process of ventilated cavitation.

关键词： natural cavitation ventilated cavitation shapecharacters water tunnel experiment projectile experiment

Effect of simvastatin on expression of IL17,HMGB1 and TLR4 in LN kidney tissues of rats

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Asian Pacific Journal of Tropical Medicine 2014年第10期7卷 792-795页

作者： ying Qin Ya-Ting Sun Lin-Xia Xia ying-jie zhang Xue-Jun Yan Urology Department Shanghai Pudong Hospital of traditional Chinese medicine Urology Department Shuguang Hospital affiliated to Shanghai Traditional Chinese Medicine University

Objective:To observe the intervention influence and effect of simvastatin on the expression of interleukin 17(L117),high mobility group protein 1(HMGB1)and TLR4 path in Lupus nephritis(LN)***:A total of 28 BSXSB male mice with LN(16 weeks)were randomlv divided into observation group and the comparison group,observation group was given 6 mg·kg^(-1)·d^(-1)simvastatin in 0.1%PBS lavage for 4 *** comparison group was not given any *** urea nitrogen(BUN)level and urine trace albumin(Scr)level of two groups were *** expression of ***1 and TLR4 protein was detected using immune histochemical method,and the kidney histological damage was ***:BNU,***1,TLR4protein and HMGB1 mRNA in observation group was significantly lower than that in control group(P<0.05):There was no statistical difference of Scr level between two goups(P<0.05).Histological observation showed glomerular lesions integral of observation group was obviously lower than that of control ***:Simvastatin can reduce the expression of ***1 and TLR4 protein in LN mice,thereby can inhibit the autoimmune response as a potential treatment function of LN.

关键词： Simvastatin Lupus nephritis IL17 HMGB1 TLR4 Expression

0.05% atropine on control of myopia progression in Chinese school children: a randomized 3-year clinical trial

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International Journal of Ophthalmology(English edition) 2023年第6期16卷 939-946页

作者： Qin Zhu Guang-Yong Tang Zhi-Juan Hua Li-Ping Xue Yuan Zhou jie-ying zhang ying-Ting Zhu Xiao-Fan zhang Department of Pediatric Ophthalmology Affiliated Hospital of Yunnan UniversityKunming 650021Yunnan ProvinceChina Department of Ophthalmology People’s Hospital of Xundian CountyKunming 655200Yunnan ProvinceChina BioTissue(Tissue Tech Inc.)Ocular Surface Centerand Ocular Surface Research&Education FoundationMiamiFL 33126USA

·AIM:To evaluate the effect of 0.05%atropine on the control of myopia for 2y(phase I)and on spherical equivalent refraction(SER)progression for 1y(phase II)after its withdrawal in Chinese myopic children.·METHODS:Totally 142 children with myopia were randomly assigned to the 0.05%atropine group or to the placebo *** phase I,children received 1 treatment for each eye *** phase II,the patients received no *** length(AL),SER,intraocular pressure(IOP)and atropine-related side effects were assessed at 6 months’intervals.·RESULTS:During phase I,the mean change of SER was-0.46±0.30 D in the atropine group,compared to-1.72±1.12 D in the placebo group(P0.05).Furthermore,the change in SER from the atropine group was 0.50±0.41 D,which was significantly lower than 0.72±0.60 D from placebo group,(P0.05).·CONCLUSION:The use of 0.05%atropine for two consecutive years may effectively control elongation of AL and thus progression of myopia,without significant SER progression 1y after atropine ***,treatment with 0.05%atropine daily for 2y is effective and safe.

关键词： atropine axial length spherical equivalent refraction children myopia

Enhanced methanol oxidation activity of Au@Pd nanoparticles supported on MWCNTs functionalized by MB under ultraviolet irradiation

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Rare Metals 2015年第1期34卷 12-16页

作者： Ming-Li Xu Xi-Kun Yang ying-jie zhang Shu-Biao Xia Peng Dong Guo-Tao Yang Faculty of Science Kunming University of Science and Technology Research Center for Analysis and Measurement Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology

A successful approach to assemble Au core Pd shell （Au@Pd） nanoparticles on the surface of multi-walled carbon nanotubes functionalized by methylene blue （MB）（Au@Pd/fuv-MWCNTs） was reported. In this method, MWCNTs were functionalized under ultraviolet irradiation. UV-Vis analysis and high-angle annular dark-field trans- mission electron microscope （HAADF-TEM） image prove that core-shell structure of Au@Pd nanoparticles forms. TEM results indicate that Au@Pd nanoparticles （ - 5.2 nm） are well-dispersed on the surface of fuv-MWCNTs. X-ray photoelectron spectroscopy （XPS） reveals that ultraviolet irradiation can promote the interaction between Au@Pd nanoparticles and the functional groups on the surface of MWCNTs. Cyclic voltammograms （CV）, chronoampero- grams （CA）, and electrochemical impedance spectroscopy （EIS） results demonstrate that the Au@Pd/fuv-MWCNTs catalysts show excellent electrocatalytic performance for methanol oxidation in alkaline media. The catalytic activity of the Au@Pd/fuv-MWCNTs is ~ 2 times higher than that of the commercial Pd/C catalysts. This is mostly attributed to that ultraviolet irradiation can make the moieties of MB provide a uniform surface with active and anchoring sites, and improves the functional effect of MB on the surface of MWCNTs. Especially, ultraviolet irradiation modifies electronic structure of Pd and is beneficial for the enhance- ment of catalytic activity.

关键词： Au@Pd core-shell nanoparticle Multi-walledcarbon nanotube Methylene blue Electrocatalyst Methanol oxidation Ultraviolet irradiation

Heterostructure:application of absorption-catalytic center in lithium-sulfur batteries

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Rare Metals 2024年第4期43卷 1461-1487页

作者： Fei Wang Chun-Man Yang Yong-Qi Wang Dan You Wen-Hao Yang Rong-Wei Huang Ji-Yue Hou Qian Wang ying-jie zhang ying Wang Yue-Jing Zeng Yi-Yong zhang Xue Li National Local Joint Engineering Research Center for Lithium-Ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Batteries Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093China College of Electrical Information Engineering Panzhihua UniversityPanzhihua617000China State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Centre of Chemistry for Energy MaterialsState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China

Due to the high theoretical specific capacity(1675 mAh·g^(-1)),low cost,and high safety of the sulfur cathodes,they are expected to be one of the most promising rivals for a new generation of energy storage ***,the shuttle effect,low conductivity of sulfur and its discharge products,volume expansion,and other factors hinder the commercialization of lithium-sulfur batteries(LSBs).The development of sulfur-fixing materials and the design of multifunctional materials to enhance the electrochemical performance of LSBs have been the main research priorities in recent *** of the advantages of high conductivity,built-in electric field,and good synergism,more and more researchers have employed heterostructure into sulfur-fixing materials to enhance the catalytic and absorption ability for *** this review,the principle of heterostructure and the mechanism of enhancing the performance of lithium-sulfur batteries are *** applications of heterostructure in cathode and interlayer of LSBs in the latest years are ***,the cutting-edge troubles and possibilities of heterostructures in LSBs are briefly presented.

关键词： Lithium-sulfur batteries(LSBs) Heterostructure Built-in electric field Catalytic Absorption

Pressure induced color change and evolution of metallic behavior in nitrogen-doped lutetium hydride

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Science China(Physics,Mechanics & Astronomy) 2023年第8期66卷 125-130页

作者： ying-jie zhang Xue Ming Qing Li Xiyu Zhu Bo Zheng Yuecong Liu Chengping He Huan Yang Hai-Hu Wen National Laboratory of Solid State Microstructures and Department of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

By applying pressures up to 42 GPa on the nitrogen-doped lutetium hydride(LuH2_(±x)N_(y)),we have found a gradual change of color from dark-blue to pink-violet in the pressure region of about 12 to 21 *** temperature dependence of resistivity under pressures up to 50.5 GPa shows progressively optimized metallic behavior with ***,in the pressure region for the color change,a clear decrease of resistivity is observed with the increase of pressure,which is accompanied by a clear increase of the residual resistivity ratio(RRR).Fitting to the low temperature resistivity gives exponents of about 2,suggesting a Fermi-liquid behavior in the low temperature *** general behavior in a wide temperature region suggests that the electron-phonon scattering is still the dominant *** magnetoresistance up to 9 T in the state under a pressure of 50.5 GPa shows an almost negligible effect,which suggests that the electric conduction in the pink-violet state is dominated by a single *** is highly desired to have theoretical efforts in understanding the evolution of color and resistivity in this interesting system.

关键词： nitrogen-doped lutetium hydride room temperature superconductivity high-pressure technique color change

Transcranial pulse current stimulation improves the locomotor function in a rat model of stroke

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Neural Regeneration Research 2021年第7期16卷 1229-1234页

作者： Wen-Jing Wang Yan-Biao Zhong Jing-Jun Zhao Meng Ren Si-Cong zhang Ming-Shu Xu Shu-Tian Xu ying-jie zhang Chun-Lei Shan Center of Rehabilitation Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina School of Rehabilitation Science Shanghai University of Traditional Chinese MedicineShanghaiChina Department of Rehabilitation Medicine The First Affiliated Hospital of Xinxiang Medical UniversityXinxiangHenan ProvinceChina Laboratory of Neurobiology Shanghai Research Institute of Acupuncture and MeridianShanghaiChina

Previous studies have shown that transcranial pulse current stimulation(tPCS) can increase cerebral neural plasticity and improve patients' locomotor ***, the precise mechanisms underlying this effect remain *** the present study, rat models of stroke established by occlusion of the right cerebral middle artery were subjected to tPCS, 20 minutes per day for 7 successive *** significantly reduced the Bederson score, increased the foot print area of the affected limbs, and reduced the standing time of affected limbs of rats with stroke compared with that before *** staining and western blot assay revealed that tPCS significantly increased the expression of microtubule-associated protein-2 and growth-associated protein-43 around the ischemic *** finding suggests that tPCS can improve the locomotor function of rats with stroke by regulating the expression of microtubule-associated protein-2 and growth-associated protein-43 around the ischemic *** findings may provide a new method for the clinical treatment of poststroke motor dysfunction and a theoretical basis for clinical application of *** study was approved by the Animal Use and Management Committee of Shanghai University of Traditional Chinese Medicine of China(approval ***190315003) on February 22, 2019.

关键词： motor function neural plasticity non-invasive brain stimulation protection repair stroke transcranial pulse current stimulation

ZnO/ZnS heterostructure in N-doped porous carbon for anchoring-diffusion-conversion of polysulfides for high-performance lithium-sulfur batteries

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Rare Metals 2024年第8期43卷 3661-3676页

作者： Fei Wang Rong-Wei Huang Wen-Chang Han Chun-Man Yang Wen-Hao Yang Peng Dong Chao-Ling Wu Yi-Yong zhang Xue Li ying-jie zhang National Local Joint Engineering Research Center for LithiumIon Batteries and Materials Preparation Technology Key Laboratory of Advanced Batteries Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China Engineering Research Center of Alternative Energy Materials and Devices Sichuan UniversityMinistry of EducationChengdu 610065China

The shuttle effect of polysulfides is one of the key factors hindering the commercialization of lithiumsulfur batteries(LSBs).Owing to their high conductivity and advantageous structure,heterostructures can be used in sulfur fixation and catalysis of *** this study,a flower-shaped ZnO/ZnS heterostructure on a nitrogendoped porous carbon(NPC) sulfur host was *** ZnO/ZnS heterostructure regulates the electronic structure of the material and exhibits higher metal-like ***,the ZnO/ZnS heterostructure combines the strong adsorption property of ZnO and the high catalytic ability of ZnS to realize the anchoring-diffusionconversion of lithium poly sulfides(LiPSs).Results reveal that the developed ZnO/ZnS@NPC/S cathode has excellent electrochemical performance in LSBs,achieving a high discharge specific capacity of 1365.3 mAh·g^(-1) at 0.1C and excellent rate capability(719 mAh·g^(-1) at 2C;the capacity decay rate is only 0.042% per cycle after 1000 cycles).Even under a high sulfur loading-E/S(electrolyte/sulfur)ratio of 5.1 mg·cm^(-2)-6 μl·mg^(-1),a high specific capacity of 723.7 mAh·g^(-1) is maintained after 60 *** study provides a new strategy for a multifunctional sulfur host that can effectively alleviate the shuttle effect of LiPSs and improve the utilization of sulfur active substances.

关键词： ZnO/ZnS heterostructure Lithium-sulfur batteries Density functional theory Anchor Conversion