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Ultrathin Acoustic Parity-Time Symmetric Metasurface Cloak

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Research 2019年第1期2019卷 671-677页

作者： Hao-xiang Li Mar-a Rosendo-López yi-fan zhu Xu-dong fan Daniel Torrent Bin Liang Jian-chun Cheng Johan Christensen Key Laboratory of Modern Acoustics MOEInstitute of AcousticsDepartment of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Physics Universidad Carlos III de Madrid28916 LeganesMadridSpain GROC UJIInstitut de Noves Tecnologies de la Imatge(INIT)Universitat Jaume I12080 Castell`eSpain

Invisibility or unhearability cloaks have been made possible by using metamaterials enabling light or sound to fow around obstacle without the trace of refections or *** are known for being fexible building units that can mimic a host of unusual and extreme material responses,which are essential when engineering artifcial material properties to realize a coordinate transforming *** and stretching the coordinate grid in space require stringent material parameters;therefore,small inaccuracies and inevitable material losses become sources for unwanted scattering that are decremental to the desired *** obstacles further limit the possibility of achieving a robust concealment of sizeable objects from either radar or sonar *** using an elaborate arrangement of gain and lossy acoustic media respecting parity-time symmetry,we built a one-way unhearability cloak able to hide objects seven times larger than the acoustic *** speaking,our approach has no limits in terms of working frequency,shape,or size,specifcally though we demonstrate how,in principle,an object of the size of a human can be hidden from audible sound.

关键词： coordinate stretching arrangement

Waveguide-coupled deterministic quantum light sources and post-growth engineering methods for integrated quantum photonics

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Chip 2022年第3期1卷 28-49页

作者： Xu-Dong Wang yi-fan zhu Ting-Ting Jin Wei-Wen Ou Xin Ou Jia-Xiang Zhang State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200092China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Integrated photonic quantum circuits(IPQCs)have attracted increasing attention in recent years due to their widespread applications in quantum information *** the most envisioned quantum technologies such as quantum communications,quantum computer and quantum simulations have placed a strict constraint on the scalability of chip-integrated quantum light *** introducing sizeconfined nanostructures or crystal imperfections,low-dimensional semiconductors have been broadly explored as chip-scale deterministic single-photon sources(SPSs).Thus far a variety of chip-integrated deterministic SPSs have been investigated across both monolithic and hybrid photonic platforms,including molecules,quantum dots,color centers and two-dimensional *** the rapid development of the chip-scale generation of single photons with deterministic quantum emitters,the field of IPQCs has raised new challenges and *** this paper,we highlight recent progress in the development of waveguide-coupled deterministic SPSs towards scalable IPQCs,and review the post-growth tuning techniques that are specifically developed to engineer the optical properties of these WG-coupled *** prospects on stringent requirement for the quantum engineering toolbox in the burgeoning field of integrated photonics are also discussed.

关键词： Single photon sources On-chip Integrated circuits Post-growth engineering Low-dimensional semiconductors

Sutureless choledochoduodenostomy with an intraluminal degradable stent in dog model

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Chinese Medical Journal 2011年第13期124卷 1999-2003页

作者： zhu Ling-hua LIANG Xiao LIN Hui WANG yi-fan zhu yi-ping CAI Xiu-jun Department of General Surgery Sir Run Run Shaw HospitalCollege of Medicine the Institute of Minimally Invasive SurgeryZhejiang University Hangzhou Zhejiang 310016 China

Background It is difficult and time-consuming for carrying out conventional hand-sewn bilioenteric anastomosis, especially for small bile duct anastomosis and laparoscopic procedure. In order to simplify it, we have developed a novel procedure of sutureless bilioenteric anastomosis with an intraluminal degradable stent. This study aimed to evaluate the feasibility and safety of this technique with cholangioduodenostomy in dog model. Methods A patent intraluminal degradable stent tube for sutureless choledochoduodenostomy in dog model was made with polylactic acid in diameter of 3 mm or 4 mm. Thirty-eight dogs were randomly divided into to a stent group （SG, n=20） and a control group （CG, n=18）. Dogs in the SG underwent sutureless choledochoduodenostomy with intraluminal stent, while the CG underwent conventional choledochoduodenostomy （single layer discontinuous anastomosis with absorbable suture）. Dogs of each group were divided into 4 subgroups according to time of death （1,3, 6, and 12 months postoperatively） to evaluate the healing of anastomosis. Operation time, intraoperative tolerance pressure of anastomosis, rate of postoperative bile leakage, bursting pressure of anastomosis were compared between the two groups. Anastomosis tissue was observed afterwards by pathology evaluation, hydroxyproline content, serum bilirubin, liver enzyme level and magnetic resonance cholangio-pancreatography （MRCP） to assess the stricture. Results All procedures were completed successfully. The surgical time of the SG was significantly less than the CG （SG：（19.2±4.3） minutes, vs. CG：（29.2±7.1） minutes, P=0.000）. One bile leakage was occurred in either group. No significant difference of intraoperative tolerance pressure of anastomosis, rate of bile leakage and postoperative bursting pressure of anastomosis, anastomotic stricture, hydroxyproline content, serum bilirubin and liver enzyme level was found between the two groups. MRCP showed no anastomosis stricture and obstruction

关键词： stent surgical anastomosis duodenum common bile duct

Design of hadronic calorimeter for DarkSHINE experiment

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Nuclear Science and Techniques 2024年第9期35卷 155-167页

作者： Zhen Wang Rui Yuan Han-Qing Liu Jing Chen Xiang Chen Kim Siang Khaw Liang Li Shu Li Kun Liu Qi-Bin Liu Si-Yuan Song Tong Sun Xiao-Long Wang Yu-Feng Wang Hai-Jun Yang Jun-Hua Zhang Yu-Lei Zhang Zhi-Yu Zhao Chun-Xiang zhu Xu-Liang zhu yi-fan zhu Tsung-Dao Lee Institute Shanghai Jiao Tong University1 Lisuo RoadShanghai 201210China Institute of Nuclear and Particle Physics School of Physics and Astronomy800 Dongchuan RoadShanghai 200240China Key Laboratory for Particle Astrophysics and Cosmology(MOE) Shanghai Key Laboratory for Particle Physics and Cosmology(SKLPPC)Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Fudan UniversityShanghai 200443China Institute of Modern Physics Fudan UniversityShanghai 200443China

The sensitivity of the dark photon search through invisible decay final states in low-background experiments relies sig-nificantly on the neutron and muon veto efficiencies,which depend on the amount of material used and the design of the detector *** paper presents the optimized design of the hadronic calorimeter(HCAL)used in the DarkSHINE experiment,which is studied using a GEANT4-based simulation *** geometry is optimized by comparing a traditional design with uniform absorbers to one that uses different thicknesses at different locations on the detector,which enhances the efficiency of vetoing low-energy neutrons at the sub-GeV *** overall size and total amount of material used in the HCAL are optimized to be lower,owing to the load and budget requirements,whereas the overall performance is studied to satisfy the physical objectives.

关键词： Hadronic calorimeter GEANT4 simulation Neutron background Scintillation detector Dark photon

Clinical Outcome of Autologous Hematopoietic Stem Cell Infusion via Hepatic Artery or Portal Vein in Patients with End-stage Liver Diseases

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Chinese Medical Sciences Journal 2014年第1期29卷 15-22页

作者： Xiao-lun Huang Le Luo Lan-yun Luo Hua Xue Ling-ling Wei Yu-tong Yao Hai-bo Zou Xiao-bing Huang yi-fan zhu Tian Zhang Ping Xie Mao-zhu Yang Shao-ping Deng Center for Cell Transplantation(Seventh Unit of General Surgery Department) Institute of Organ TransplantationSichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital Department of Blood Medicine Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital Department of Radiology Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital

Objective To investigate the efficacy of hematopoietic stem cell （HSC） transplantation via the hepatic artery vs. the portal vein for end-stage liver disease （ESLD）. Methods Patients with hepatic decompensation were prospectively recruited from September 2010 to September 2012 to receive HSC transplantation via the hepatic artery or the portal vein. Liver function was examined at 3, 6, and 12 months after transplantation. Liver biopsy results were analyzed using the Knodell score. Results Eighty patients （58 males and 22 females） were enrolled in the study. The Child-Pugh score was grade B in 69 cases, and grade C in the remaining 11 cases. HSC transplantation was performed via the portal vein in 36 patients and via the hepatic artery in 44 patients. ALT levels decreased while serum albumin levels increased significantly in both groups at 6 and 12 months after HSC transplantation （P〈0.05 compared with pre-transplantation levels）. Total biliruhin levels decreased significandy in both groups at 3, 6, and 12 months after HSC transplantation （P〈0.05 compared with pre-transplantation levels）. Additionally, prothromhin time decreased in both groups at 12 months after HSC transplantation （P〈0.05 compared with pre-transplantation level）. There were no significant differences in ALT, total bilirubin and prothromhin time between the two groups either before or after transplantation. Moreover, Knodell score decreased significantly at 6 and 12 months. Histological examination showed that liver cell edema, degeneration, necrosis, and inflammation were significantly relieved at 3, 6, and 12 months after transplantation. The incidence of portal vein thrombosis, upper gastrointestinal bleeding, and hepatic encephalopathy were 1.25%, 3.75%, and 2.5% respectively. The one-year survival rate was 100%. Conclusions Autologous HSC transplantation improves liver function and histology in ESLD patients The administration route of HSC has no significant impact on the efficacy of transpla

关键词： end-stage liver diseases autologous transplantation hematopoietic stem cells liver function

Coordinated Control Strategy of New Energy Power Generation System with Hybrid Energy Storage Unit

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Energy Engineering 2025年第1期122卷 167-184页

作者： Yun Zhang ZifenHan Biao Tian Ning Chen yi fan School of Mechano-Electronic Engineering Xidian UniversityXi’an710071China Electric Power Control Center State Grid Gansu Electric Power CompanyLanzhou730030China Electric Power Control Center State Grid Gansu Electric Power Company Zhangye Power Supply BranchZhangye734000China

The new energy power generation is becoming increasingly important in the power *** as photovoltaic power generation has become a research hotspot,however,due to the characteristics of light radiation changes,photovoltaic power generation is unstable and random,resulting in a low utilization rate and directly affecting the stability of the power *** solve this problem,this paper proposes a coordinated control strategy for a newenergy power generation system with a hybrid energy storage unit based on the lithium iron phosphate-supercapacitor hybrid energy storage ***,the variational mode decomposition algorithm is used to separate the high and low frequencies of the power signal,which is conducive to the rapid and accurate suppression of the power fluctuation of the energy storage ***,the fuzzy control algorithm is introduced to balance the power between energy *** this paper,the actual data is used for simulation,and the simulation results show that the strategy realizes the effective suppression of the bus voltage fluctuation and the accurate control of the internal state of the energy storage unit,effectively avoiding problems such as overshoot and over-discharge,and can significantly improve the stability of the photovoltaic power generation systemand the stability of the Direct Current *** is of great significance to promote the development of collaborative control technology for photovoltaic hybrid energy storage units.

关键词： Photovoltaic power suppression hybrid energy storage unit variationalmodal decomposition fuzzy control power distribution control

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灰色信息攻击下相依网络的鲁棒性

东北大学学报（自然科学版） 2016年第10期37卷 1393-1397页

作者：朱潜王一帆朱志良任涛东北大学软件学院辽宁沈阳110819 东北大学计算机科学与工程学院辽宁沈阳110819

研究了双层相依网络在灰色信息攻击下的鲁棒性,讨论了在该模型上的数据包传输问题,建立了一个由节点负荷过载而引发的级联失效动态模型.通过一个可调参数来控制攻击网络节点信息的精度,随机失效和蓄意攻击是该模型的两种极端情况.分别... 详细信息

研究了双层相依网络在灰色信息攻击下的鲁棒性,讨论了在该模型上的数据包传输问题,建立了一个由节点负荷过载而引发的级联失效动态模型.通过一个可调参数来控制攻击网络节点信息的精度,随机失效和蓄意攻击是该模型的两种极端情况.分别对不同类型网络和不同耦合方式情况下的双层相依网络鲁棒性进行了研究.仿真实验发现,降低攻击信息的精度能提高网络的鲁棒性,而且攻击信息的精度存在着临界现象.

关键词：级联失效相依网络鲁棒性灰色信息攻击

Recent advances of metal vacancies in energy and environmental catalysis:Synthesis,characterization,and roles

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Green Energy & Environment 2025年第1期10卷 84-108页

作者： Long Sun Shunzheng Zhao Sirui Gao Ronghui zhu yiran Tan Xiaolong Tang Honghong yi School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing100083China

With the ongoing depletion of fossil fuels,energy and environmental issues have become increasingly critical,necessitating the search for effective ***,being one of the hallmarks of modern industry,offers a promising avenue for ***,the question of how to significantly enhance the performance of catalysts has gradually drawn the attention of *** engineering,a commonly employed and effective approach to improve catalyst activity,has become a significant research focus in the catalysis field in recent *** vacancies have received extensive attention due to their simple ***,exploration of metal vacancies has remained stagnant for a considerable period,resulting in a scarcity of comprehensive reviews on this ***,based on the latest research findings,this paper summarizes and consolidates the construction strategies for metal vacancies,characterization techniques,and their roles in typical energy and environmental catalytic ***,it outlines potential challenges in the future,aiming to provide valuable references for researchers interested in investigating metal vacancies.

关键词： Metal vacancies Catalysis Construction strategies Characterization techniques Roles

Longitudinal assessment of peripheral organ metabolism and the gut microbiota in an APP/PS1 transgenic mouse model of Alzheimer’s disease

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Neural Regeneration Research 2025年第10期20卷 2982-2997页

作者： Hongli Li Jianhua Huang Di Zhao Lemei zhu Zheyu Zhang Min yi Weijun Peng Department of Integrated Traditional Chinese&Western Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina National Clinical Research Center for Metabolic Diseases ChangshaHunan ProvinceChina Hunan Academy of Chinese Medicine ChangshaHunan ProvinceChina Academician Workstation Changsha Medical UniversityChangshaHunan ProvinceChina

Alzheimer’s disease not only affects the brain,but also induces metabolic dysfunction in peripheral organs and alters the gut *** aim of this study was to investigate systemic changes that occur in Alzheimer’s disease,in particular the association between changes in peripheral organ metabolism,changes in gut microbial composition,and Alzheimer’s disease *** do this,we analyzed peripheral organ metabolism and the gut microbiota in amyloid precursor protein-presenilin 1(APP/PS1)transgenic and control mice at 3,6,9,and 12 months of ***-month-old APP/PS1 mice exhibited cognitive impairment,Alzheimer’s disease-related brain changes,distinctive metabolic disturbances in peripheral organs and fecal samples(as detected by untargeted metabolomics sequencing),and substantial changes in gut microbial composition compared with younger APP/PS1 ***,a strong correlation emerged between the gut microbiota and kidney metabolism in APP/PS1 *** findings suggest that alterations in peripheral organ metabolism and the gut microbiota are closely related to Alzheimer’s disease development,indicating potential new directions for therapeutic strategies.

关键词： Alzheimer’s disease APP/PS1 mice brain-kidney axis gut microbiota heart-brain axis liver-brain axis lung-brain axis microbiota-gut-brain axis peripheral organ metabolism spleen-brain axis