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Suppression of leakage effect of Majorana bound states in the T-shaped quantum-dot structure

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Chinese Physics B 2021年第7期30卷 489-497页

作者： Wei-Jiang Gong Yu-Hang xue Xiao-Qi Wang lian-lian zhang Guang-Yu Yi College of Sciences Northeastern UniversityShenyang 110819China Basic department Yingkou Institute of TechnologyYingkou 115014China

We theoretically study the transport properties in the T-shaped double-quantum-dot structure,by considering the dot in the main channel to be coupled to the Majorana bound state(MBS)at one end of the topological superconducting *** is found that the side-coupled dot governs the effect of the MBS on the transport *** its level is consistent with the energy zero point,the MBS contributes little to the conductance ***,the linear conductance exhibits notable changes according to the inter-MBS coupling *** the absence of inter-MBS coupling,the linear conductance value keeps equal to e^(2)/2 h when the level of the side-coupled dot departs from the energy zero ***,the linear conductance is always analogous to the MBS-absent case once the inter-MBS coupling comes into *** findings provide new information about the leakage effect of MBSs in quantum-dot structures.

关键词： Majorana bound states quantum dots conductance antiresonance

Co-design for an SoC embedded network controller

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第4期7卷 591-596页

作者： ZOU lian-ying ZOU xue-cheng Department of Electronic Science ＆ Technology Huazhong University of Science ＆ Technology Wuhan 430074 China

With the development of Ethernet systems and the growing capacity of modem silicon technology, embedded communication networks are playing an increasingly important role in embedded and safety critical systems. Hardware/software co-design is a methodology for solving design problems in processor based embedded systems. In this work, we implemented a new 1-cycle pipeline microprocessor and a fast Ethemet transceiver and established a low cost, high performance embedded network controller, and designed a TCP/IP stack to access the Intemet. We discussed the hardware/software architecture in the forepart, and then the whole system-on-a-chip on Altera Stratix EP1S25F780C6 device. Using the FPGA environment and SmartBit tester, we tested the system＇s throughput. Our simulation results showed that the maximum throughput of Ethemet packets is up to 7 Mbps, that of UDP packets is up to 5.8 Mbps, and that of TCP packets is up to 3.4 Mbps, which showed that this embedded system can easily transmit basic voice and video signals through Ethemet, and that using only one chip can realize that many electronic devices access to the Intemet directly and get high performance.

关键词： System-on-Chip (SoC) Embedded Microprocessor Network controller TCP/IP Co-design

Acid-rock reaction kinetics in a two-scale model based on reaction order correction

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Petroleum Science 2024年第3期21卷 2089-2101页

作者： xue-Song Li Ning Qi Ze-Hui zhang lian Liu Xia-Qing Li Xu-Hang Su School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Key Lab of Unconventional Oil&Gas Development Ministry of EducationChina University of Petroleum(East China)Qingdao26650ShandongChina SINOPEC Northwest Oilfield Branch Company Urumqi830011XinjiangChina Petroleum Engineering Technology Research Institute SINOPEC Shengli Oilfield CompanyDongying257000ShandongChina

The reaction order plays a crucial role in evaluating the response rate of ***,the conventional two-scale model typically assumes that the reaction order is constant as one,which can lead to significant deviations from *** address this issue,this study proposes a novel multi-order dynamic model for acid-rock reaction by combining rotating disk experimental data with theoretical *** numerical simulations,this model allows for the investigation of the impact of acidification conditions on different orders of reaction,thereby providing valuable insights for on-site *** analysis reveals that higher response orders require higher optimal acid liquid flow rates,and lower optimal H+diffusion coefficients,and demonstrate no significant correlation with acid ***,it is recommended to increase the displacement and use high-viscosity acid for reservoirs with high calcite content,while reducing the displacement and using low-viscosity acid for reservoirs with high dolomite content.

关键词： Reaction order Two-scale model Wormhole propagation Carbonate rocks Numerical simulation

Mechanism of Wnt/β-catenin signaling pathway in enhanced malignant phenotype of non-small cell lung cancer induced by antiangiogenesis therapy

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Asian Pacific Journal of Tropical Medicine 2016年第1期9卷 55-59页

作者： Xiao-xue zhang Ling-Ling zhang Huan-lian Yang Xiu-Wen Wang Shandong University School of Medicine Department of Oncology Binzhou People's Hospital Department of Oncology Qilu Hospital of Shandong University

Objective:To study the mechanism of Wnt/β-catenin signaling pathway in the enhanced malignant phenotype of A549 cells of human non-small cell lung cancer induced by the antiangiogenesis ***:The siRNA technique was employed to inhibit the expression of vascular endothelial growth factor(VEGF) in A549 cells and simulate the clinical course of anti-angiogencsis ***-time PCR and western-blot were used to study the change in the expression of Wnt/β-catenin signaling molecules at the mRNA and protein level respectively,as well as the effect on the epithelial mesenchymal transition in A549 *** proliferation and invasion abilities of tumor cells were detected to discuss the mechanism of Wnt/β-catenin signaling pathway in the enhanced malignant phenotype of non-small cell lung cancer induced by the anti-angiogenesis ***:The specific siRNA could significantly inhibit the expression of VEGF in cells to simulate the anti-angiogenesis *** the action of 50 nM VEGF siRNA,the proliferation ability of A549 significantly increased(P<0.05).After being treated with VEGF siRNA,the invasion ability of cells ***-four hours after the transcription of 50 nM siRNA into cells,the number of cells that come through the membrane was278.3 ± *** with the Ctrl siRNA group,when VEGF was inhibited,the expression ofβ-catenin and Cyclin D1 increased by 86%and 55%***,the expression of E-cadherin decreased,while the one of vimentin ***:siRNA can significantly inhibit the expression of *** the anti-angiogencsis therapy,the inhibited expression of VEGF can activate the Wnt/β-catenin signaling pathway to cause the epithelial mesenchymal transition and then the enhanced malignant phenotype of non-small cell lung cancer.

关键词： Anti-angiogenesis Wnt 1 β-catenin Epithelial mesenchymal transition Proliferation and invasion

3D printing hydrogels for actuators:A review

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Chinese Chemical Letters 2021年第10期32卷 2923-2932页

作者： Aokai zhang Feng Wang lian Chen Xianshuo Wei Maoquan xue Feng Yang Shaohua Jiang Changzhou Institute of Industry Technology Changzhou 213164China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China

Soft and wet actuator systems have attracted great attention in some applications,such as assistive technologies for rehabilitation,training and regenerative ***-dimensional(3D)printing methods have realized the rapid fabrication of complex structures without the need for expensive dies or post *** this review,a comprehensive description is presented on stimuli-responsive hydrogels fabricated by light-responsive and extrusion-based 3D printing *** of actuations have been introduced based on stimuli *** the most common method for 3D printed hydrogel actuators,direct-ink-writing has been discussed,including the two printing parameters of resolution and *** addition,applications of 3D printed hydrogel actuators are presented followed by introductions of recent contributions on enhancing the toughness of 3D printed hydrogel and robust design tools,such as finite element analysis and artificial intelligence.

关键词： Soft robotics Hydrogel 3D printing Biomaterials Actuator Finite element analysis

Coupled flow and heat transfer of power-law nanofluids on non-isothermal rough rotary disk subjected to magnetic field

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Chinese Physics B 2022年第6期31卷 483-493页

作者： Yun-Xian Pei xue-Lan zhang lian-Cun Zheng Xin-Zi Wang School of Mathematics and Sciences University of Science and TechnologyBeijing 100083China

We study the coupled flow and heat transfer of power-law nanofluids on a non-isothermal rough rotating disk subjected to a magnetic *** problem is formulated in terms of specified curvilinear orthogonal coordinate *** improved BVP4C algorithm is proposed,and numerical solutions are *** influence of volume fraction,types and shapes of nanoparticles,magnetic field and power-law index on the flow,and heat transfer behavior are *** obtained results show that the power-law exponents(PLE),nanoparticle volume fraction(NVF),and magnetic field inclination angle(MFIA)have almost no effects on velocities in the wave surface direction,but have small or significant effects on the azimuth *** NVF has remarkable influences on local Nusselt number(LNN)and friction coefficients(FC)in the radial direction and the azimuth direction(AD).The LNN increases with NVF increasing while FC in AD *** types of nanoparticles,magnetic field strength,and inclination have small effects on LNN,but they have remarkable influences on the friction coefficients with positively correlated heat transfer rate,while the inclination is negatively correlated with heat transfer *** size of the nanoparticle shape factor is positively correlated with LNN.

关键词： power-law nanofluids magnetic field improved BVP4C algorithm rough rotating disk

激光诱导荧光技术与地下水重金属原位检测应用进展

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岩矿测试 2025年第1期44卷 19-34页

作者：毛康薛家奇陈卓张华中国科学院地球化学研究所环境地球化学国家重点实验室贵州贵阳550081

对地下水重金属污染进行现场检测,是快速识别重金属种类和评价污染程度的重要手段。激光诱导荧光技术(LIF)利用特定荧光探针,在目标重金属存在下,通过激光诱导荧光探针产生/猝灭荧光,从而完成对重金属的识别和检测,具有快速甄别地下水... 详细信息

对地下水重金属污染进行现场检测,是快速识别重金属种类和评价污染程度的重要手段。激光诱导荧光技术(LIF)利用特定荧光探针,在目标重金属存在下,通过激光诱导荧光探针产生/猝灭荧光,从而完成对重金属的识别和检测,具有快速甄别地下水重金属污染特性和无损获取其价态的优势。本文在简述LIF检测重金属原理和LIF原位检测地下水重金属装备基础上,重点从荧光探针合成及其在重金属传感检测方法的构建上总结了基于不同荧光探针的LIF现场检测重金属的研究进展。目前可用于重金属检测的荧光探针包括以小分子探针、有机大分子和聚集诱导发光为主的有机荧光探针和以金纳米簇、量子点和金属有机框架材料为代表的纳米荧光探针。这些探针的合成及其对应的传感检测方法的构建表明LIF技术在地下水重金属检测中具有巨大优势。而针对地下水重金属检测的LIF设备研发方面的成果虽不如荧光传感检测方法丰富,但已研制出部分重金属的传感器和检测装备,表现出良好的应用前景。未来研究将会聚焦在地下水重金属主控因子识别和抗干扰技术研发、荧光探针合成与LIF检测方法构建、重金属传感部件和检测装备集成研制,以及检测技术标准化,为后续场地地下水典型重金属LIF检测技术的研究提供参考。

关键词：地下水重金属激光诱导荧光荧光探针现场检测

Soil Nematode Response to Biochar Addition in a Chinese Wheat Field

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Pedosphere 2013年第1期23卷 98-103页

作者： zhang Xiao-Ke LI Qi lianG Wen-Ju zhang Min BAO xue-lian XIE Zu-Bin State Key Laboratory of Forest and Soil Ecology Institute of Applied Ecology Chinese Academy of Sciences University of Chinese Academy of Sciences Jiangsu Biochar Engineering Center State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences

While studies have focused on the use of biochar as soil amendment, little attention has been paid to its effect on soil fauna. The biochar was produced from slow pyrolysis of wheat straw in the present study. Four treatments, no addition (CK) and three rates of biochar addition at 2 400 (B1), 12 000 (B5) and 48 000 kg ha-1 (B20), were investigated to assess the effect of biochar addition to soil on nematode abundance and diversity in a microcosm trial in China. The B5 and B20 application significantly increased the total organic carbon and the C/N ratio. No significant difference in total nematode abundance was found among the treatments. The biochar addition to the soil significantly increased the abundance of fungivores, and decreased that of plant parasites. The diversity of soil nematodes was significantly increased by B1 compared to CK. Nematode trophic groups were more effectively indicative to biochar addition than total abundance.

关键词： diversity ecological indices microcosm trial nematode community trophic groups

A SIMPLE SMOOTH EXACT PENALTY FUNCTION FOR SMOOTH OPTIMIZATION PROBLEM

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Journal of Systems Science & Complexity 2012年第3期25卷 521-528页

作者： Shujun lian liansheng zhang College of Operations and Management Qufu Normal University Department of Mathematics Shanghai University

For smooth optimization problem with equMity constraints, new continuously differentiable penalty function is derived. It is proved exact in the sense that local optimizers of a nonlinear program are precisely the optimizers of the associated penalty function under some nondegeneracy assumption. It is simple in the sense that the penalty function only includes the objective function and constrained functions, and it doesn＇t include their gradients. This is achieved by augmenting the dimension of the program by a variable that controls the weight of the penalty terms.

关键词： Constrained optimization exact penalty function smooth penalty function.