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Critical couplings in topological-insulator waveguide-resonator systems observed in elastic waves

National Science Review 2021年第2期8卷 83-94页

作者： Si-Yuan Yu Cheng He Xiao-Chen Sun Hong-Fei Wang Ji-Qian Wang Zi-Dong Zhang Bi-Ye Xie Yuan Tian ming-Hui Lu yan-Feng Chen National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering Nanjing University Collaborative Innovation Center of Advanced Microstructures Nanjing University Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University

Waveguides and resonators are core components in the large-scale integration of electronics, photonics and phononics, both in existing and future scenarios. In certain situations, there is critical coupling of the two components; i.e. no energy passes through the waveguide after the incoming wave couples into the resonator. The transmission spectral characteristics resulting from this phenomenon are highly advantageous for signal filtering, switching, multiplexing and sensing. In the present study, adopting an elastic-wave platform, we introduce topological insulator(TI), a remarkable achievement in condensed matter physics over the past decade, into a classical waveguide-ring-resonator configuration. Along with basic similarities with classical systems, a TI system has important differences and advantages, mostly owing to the spin-momentum locked transmission states at the TI boundaries. As an example, a two-port TI waveguide resonator can fundamentally eliminate upstream reflections while completely retaining useful transmission spectral characteristics, and maximize the energy in the resonator, with possible applications being novel signal processing, gyro/sensing, lasering, energy harvesting and intense wave–matter interactions, using phonons, photons or even electrons. The present work further enhances confidence in using topological protection for practical device performance and functionalities, especially considering the crucial advantage of introducing(pseudo)spins to existing conventional configurations. More in-depth research on advancing phononics/photonics, especially on-chip, is foreseen.

关键词： topological insulators phononic crystals ring resonators waveguide-resonator systems critical couplings

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Hexagonal and Orthorhombic Perovskite Phases of ErMnO_3 and TmMnO_3 from Hydrothermal Systems

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Chemical Research in Chinese Universities 2010年第5期26卷 707-711页

作者： ZHU Lin-lin CHEN yan HUANG Ke-ke ZHANG Gang-hua HU Wei-wei YUAN Hong-ming CHANG Hai-bo FENG Shou-hua State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Changchun 130012 P. R. China Resource and Environment Department Jilin Agriculture University Changchun 130118 P. R. China

The powder crystals of RMnO3（R=Er, Tm） with hexagonal and orthorhombic structures were prepared under hydrothermal conditions. The different structural phases of the title compounds were controllably formed from different kinds of precursors at different reaction temperatures. All of the samples were characterized by powder X-ray diffraction, scanning electron microscopy, inductively coupled plasma analysis, and variable temperature magnetic susceptibility. Their structures were refined by Rietveld method from powder X-ray diffraction data. The measurement of magnetic behavior shows antiferromagnetic orderings at Neel temperatures around 80 and 40 K for the hexagonal and orthorhombic phases, respectively.

关键词： Manganate RMnO3 Antiferromagnetism Hydrothermal synthesis

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Calcitriol enhances pyrazinamide treatment of murine tuberculosis

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Chinese Medical Journal 2019年第17期132卷 2089-2095页

作者： Jing Zhang ming Guo Zhi-Xiang Huang Rong Bao Qian Yu ming Dai Xin Wang yan Rao Animal Biosafety Level III Laboratory at the Center for Animal Experiment Wuhan University School of Medicine Wuhan Hubei 430000 China

Background: Tuberculosis is a leading cause of morbidity and mortality in humans worldwide. There is an urgent need for new and effective drugs to treat tuberculosis and shorten the duration of tuberculosis therapy. 1, 25-dihydroxy vitamin D3 (1,25 (OH)2D3) has been reported to have a synergistic effect with pyrazinamide (PZA) in killing tubercle bacilli in vitro. The addition of 1,25 (OH)2D3 to standard tuberculosis treatment should benefit patients if the adjunctive drug has a synergistic effect in vivo. Thus, in this study, calcitriol (bioactive 1,25 (OH)2D3) was administered to mice undergoing treatment for Mycobacterium tuberculosis (***) infection with PZA, a first-line anti-tuberculosis drug, to determine whether vitamin D3 enhances the therapeutic effect. Methods: C57BL/6 female mice were infected with the *** H37Rv strain through aerosol exposure. Calcitriol and PZA, either alone or in combination, were orally administered to the *** infected mice. The effect of calcitriol on PZA activity was determined by evaluating the bacterial burden and analyzing the histopathological lesions in the lungs and spleen. To investigate the expression of inflammatory cytokines and anti-microbial peptide genes, we determined the transcriptional levels of interferon-γ(IFN-γ), interleukin-4 (IL-4), mouse β-defensin-2 (mBD2), and cathelicidin LL-37 through real-time quantitative polymerase chain reaction. The protein levels of IFN-γ were detected by enzyme-linked immunosorbent assay. Differences between groups were analyzed with independent samples t-test or one-way analysis of variance. Results: Calcitriol alone had little effect on tuberculosis infection, whereas PZA, compared with saline control treatment, decreased the bacterial burden (spleens: PZA vs. saline, 4.82 ± 0.22 vs. 5.22 ± 0.40 Log10 colony-forming units [CFU]/gram, t = 2.13, P < 0.05;lungs: PZA vs. saline, 5.55 ± 0.15 vs. 6.83 ± 0.46 Log10 CFU/gram, t = 6.56, P < 0.01) and pathological lesions in the lungs. S

关键词： Mycobacterium tuberculosis Calcitriol Pyrazinamide Vitamin D

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RL3(t),Responsible for Leaf Shape Formation,Delimited to a 46-kb DNA Fragment in Rice

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Rice science 2015年第1期22卷 44-48页

作者： GUO Min LI Rong-de YAO Jian ZHU juan FAN Xiang-yun WANG Wei TANG Shu-zhu GU ming-hong yan Chang-jie Jiangsu Key Laboratory of Crop Genetics and Physiology / Co-Innovation Center for Modern Production Technology of Grain Crops Key Laboratory of Plant Functional Genomics of the Ministry of Education Yangzhou University

Two mutants with rolled leaves, temporally designated as rl3（t）-I and rl3（t）-2, were served for exploring the mechanism underlying the rolled leaf characteristic. Except for having typical rolled leaves, the plant heights and panicle lengths of rl3（t）-1 and rl3（t）-2 significantly decreased, and the seed-setting rate also decreased when compared with wild type 93-11. Cytological analysis suggested that the rolled leaf phenotype might be caused by the changes of number and size of bulliform cells. Genetic analysis indicated rl3（t）-1 is allelic to rl3（t）-2, and controlled by a recessive gene. Gene mapping result indicated that RL3（t） gene resided in a 46-kb long region governed by the sequence tag site markers S3-39 and S3-36 on rice chromosome 3. The result provides an important clue for further cloning the RL3（t） and understanding the mechanism of rice leaf development.

关键词： gene mapping leaf shape formation mutant rice rolled leaf gene

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基于直线的运动目标相对位置姿态光学测量方法

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光学技术 2008年第6期34卷 862-865,869页

作者：仲小清霍炬杨明哈尔滨工业大学控制与仿真中心哈尔滨150080

针对运动目标的相对位置姿态测量问题,研究了一种基于目标上的两条不平行直线的光学测量方法。首先证明了使用特征光点确定目标位置姿态参数的条件;然后推导了基于直线的求取位置姿态的解析解;最后对使用该方法时的测量误差进行了仿真分... 详细信息

针对运动目标的相对位置姿态测量问题,研究了一种基于目标上的两条不平行直线的光学测量方法。首先证明了使用特征光点确定目标位置姿态参数的条件;然后推导了基于直线的求取位置姿态的解析解;最后对使用该方法时的测量误差进行了仿真分析,同时给出了实际的测量误差。由于增加了带测量的测量基线,所以减少了位置姿态参数的测量精度对光学系统的依赖。实验结果表明,该方法可满足运动目标相对位置姿态的高精度测量的需求。

关键词：计算机视觉光学测量相对位置相对姿态

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不同血压分层对糖尿病人群肾功能的影响

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解放军医学杂志 2024年第6期49卷 663-669页

作者：陈永刚吴寿岭张金凤陈朔华王丽文杨凯熊海亮高明姜春宇刘业强张艳敏唐山中心医院心内科河北唐山063000 唐山开滦总医院心内科河北唐山063000 唐山中心医院导管室河北唐山063000 唐山中心医院消化内科河北唐山063000 唐山中心医院内分泌科河北唐山063000

目的探讨不同血压分层对糖尿病人群肾功能的影响。方法采用前瞻性队列研究设计,以2006年7月-2007年10月参加健康查体的101510名开滦集团职工中9489例糖尿病患者作为观察队列,随访(8.6±4.0)年。依据基线血压水平将研究人群分为正常血压... 详细信息

目的探讨不同血压分层对糖尿病人群肾功能的影响。方法采用前瞻性队列研究设计,以2006年7月-2007年10月参加健康查体的101510名开滦集团职工中9489例糖尿病患者作为观察队列,随访(8.6±4.0)年。依据基线血压水平将研究人群分为正常血压(收缩压<120 mmHg、舒张压<80 mmHg)、血压升高(收缩压120~130 mmHg、舒张压<80 mmHg)、高血压1级[收缩压130~140 mmHg和(或)舒张压80~90 mmHg]、高血压2级[收缩压≥140 mmHg和(或)舒张压≥90 mmHg]4组。比较各组人群的慢性肾脏病(CKD)的发病密度。采用多变量Cox比例风险回归模型分析不同血压对糖尿病人群肾功能的影响,采用多变量时间依赖性Cox比例风险模型分析结果的稳定性,并排除随访期间发生心血管事件(CVD)、基线服用降压药和基线服用降糖药后进行敏感性分析。结果(1)在基线水平,高血压1级组患者年龄、体重指数(BMI)高于正常血压组患者,差异有统计学意义(P<0.05)。(2)至随访结束时,发生CKD 2294例,其中估算肾小球滤过率(eGFR)下降1117例,尿蛋白1575例,高血压1级组CKD的发病密度为39.4/千人年,eGFR下降发病密度为16.3/千人年,尿蛋白发病密度为25.5/千人年,与正常血压组比较差异均有统计学意义(log-rank检验,P<0.01)。(3)多因素Cox比例风险回归模型分析显示,与正常血压比较,高血压1级可使糖尿病人群发生CKD的风险增加29%(HR=1.29,95%CI 1.09~1.52)、eGFR下降的风险增加40%(HR=1.40,95%CI 1.08~1.80)。结论高血压1级(≥130/80 mmHg)即可增加糖尿病人群发生CKD和eGFR下降的风险,且eGFR下降的风险更大。

关键词：糖尿病高血压1级肾损伤估算肾小球滤过率尿蛋白

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Reconstructing the portal vein through a posterior pancreatic tunnel:New choice for portal vein thrombosis during liver transplantation

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World Journal of Gastrointestinal Surgery 2022年第10期14卷 1131-1140页

作者： Dong Zhao Yi-ming Huang Zi-ming Liang Kang-jun Zhang Tai-Shi Fang Xu yan Xin Jin Yi Zhang Jian-Xin Tang Lin-Jie Xie Xin-Chen Zeng Department of Liver Surgery and Organ Transplantation Center The Third People’s Hospital of ShenzhenThe Second Affiliated Hospital of Southern University of Science and TechnologyNational Clinical Research Center for Infectious DiseaseShenzhen 518000Guangdong ProvinceChina

BACKGROUND Thrombectomy and anatomical anastomosis(TAA)has long been considered the optimal approach to portal vein thrombosis(PVT)in liver transplantation(LT).However,TAA and the current approach for non-physiological portal reconstructions are associated with a higher rate of complications and mortality in some *** To describe a new choice for reconstructing the portal vein through a posterior pancreatic tunnel(RPVPPT)to address cases of unresectable *** Between August 2019 and August 2021,245 adult LTs were ***-five(18.4%)patients were confirmed to have PVT before surgery,among which seven underwent PV reconstruction via the RPVPPT *** retrospectively analyzed the surgical procedure and postoperative complications of these seven recipients that underwent PV reconstruction due to *** During the procedure,PVT was found in all the seven cases with significant adhesion to the vascular wall and could not be *** portal vein proximal to the superior mesenteric vein was damaged in one case when attempting thrombolectomy,resulting in massive *** was successfully performed in all patients with a mean duration of 585 min(range 491-756 min)and mean intraoperative blood loss of 800 mL(range 500-3000 mL).Postoperative complications consisted of chylous leakage(n=3),insufficient portal venous flow to the graft(n=1),intra-abdominal hemorrhage(n=1),pulmonary infection(n=1),and perioperative death(n=1).The remaining six patients survived at 12-17 mo *** The RPVPPT technique might be a safe and effective surgical procedure during LT for complex ***,follow-up studies with large samples are still warranted due to the relatively small number of cases.

关键词： Liver transplantation Portal vein thrombosis Portal vein reconstruction Retropancreatic tunnel Computer tomography angiography Three-dimensional visualization

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Design and analysis of logarithmic spiral type sprag one-way clutch

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Journal of Central South University 2015年第12期22卷 4597-4607页

作者：刘志辉严宏志曹煜明 State Key Laboratory of High-performance and Complex Manufacturing(Central South University) School of Mechanical and Electrical Engineering Central South University Department of Mechanical and Energy Engineering Shaoyang University

A complete mathematical model for logarithmic spiral type sprag one-way clutch design and analysis is *** assumes that the motion of all clutch components can be expressed by a model of epicyclic *** takes advantage of Hunt-Crossley contact impact theory to calculate the contact forces between sprags and races,and it can be used for optimization of design and comparison with other types of sprag clutches.A good deal of analysis shows that the parameters of the steady windup angle,the steady contact force,the natural frequency and natural cycle of clutch have nothing to do with the initial velocity of outer race,while the parameters of the maximum transient windup angle,the maximum transient impact force and the steady engagement time increase linearly in the mode of engaging operation of *** is also shown that the strut angle has great influence on the dynamic engagement performance of *** parameters of the steady windup angle,the maximum transient windup angle,the steady engaging time,the steady contact force,the maximum transient impact force and the natural cycle of clutch decrease linearly nearly with the inner strut angle,while the natural frequency of the system increases linearly with the inner strut angle.

关键词： mathematical model logarithmic spiral one-way clutch hunt-crossley windup angle steady contact force transient impact force

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Synthesis of Flowerlike Zn Nanoplate Aggregates by Vapor Deposition

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Chemical Research in Chinese Universities 2011年第5期27卷 900-902页

作者： RUAN Wei-dong yanG You-ming ZHOU Tie-li NIU Li ZHANG Xin-dong TAO yan-chun LOMBARDI John R. ZHAO Bing State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun 130012 P. R China Engineering Laboratory for Modern Analytical Techniques State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China State Key Laboratory on Integrated Optoelectronies College of Electronic Science and Engineering Jilin University Changehun 130012 P.R. China Department of Chemistry the City College of New York New York 10031 USA

1 IntroductionIn the very recent years, low-dimensional nanomaterials have attracted a great interest in nanoscience and nanotechnology due to their exciting application in electronics[1], optoelectronics[2] and mecha... 详细信息

关键词： Zinc Nanostructure Vapor deposition

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A Study of Hybrid Manufacturing Scheduling System using Simulation and Optimization

A Study of Hybrid Manufacturing Scheduling System using Simu...

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2007 International Conference on Manufacturing & Service Operations Management

作者： Shao-ju Lee ming-Hsuang Lee National Dong Hwa University Taiwan National Dong Hwa University Taiwan

＜正＞*** Make-to-Stock（MTS）and Make-to-Order（MTO）manufacturing strategies are based on different but equally meaningful economic *** former strategy is aimed at ready replenishment with on-hand stock to satisfy customers with common demands,but is burdened with relatively larger amount of inventory and related *** latter strategy

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