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Science China(Physics,Mechanics & Astronomy) 2021年第3期64卷 14-26页

作者： Gang Zhao yuqin chen CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 101408China

We search for metal-rich Sausage-kinematic(MRSK)stars with[Fe/H]>−0.8 and−100 详细信息

We search for metal-rich Sausage-kinematic(MRSK)stars with[Fe/H]>−0.8 and−100

关键词： Galactic halo spiral arms and Galactic disk chemical composition and chemical evolution kinematics and dynamics rotation

Planet host stars in open clusters

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Science China(Physics,Mechanics & Astronomy) 2015年第3期58卷 96-101页

作者： YANG XiaoLing chen yuqin ZHAO Gang Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences University of Chinese Academy of Sciences

We have compiled a list of all planet host star candidates reported in the literature,which are likely to be cluster members,and we checked their memberships by the spatial location,radial velocity,proper motion and photometric *** found that only six stars,BD-13 2130,HD 28305,Kepler-66,Kepler-67,Pr0201 and Pr0211,are planet orbiting stars in open clusters to *** stars,HD 70573 and HD 89744,belong to moving groups and one star,TYC 8975-2606-1,may not be a planet host star,while three stars,HD 16175,HD 46375 and HD 108874 are not members of open *** note that all these six planetary systems in the stellar cluster environment are younger than^1 Gyr,which might indicate that the planetary system in open cluster can not survive for a long time,and we speculate that close stellar encounters between member stars in open cluster can potentially destroy,or at least strongly affect,the presence of planetary systems.

关键词： extrasolar planets planetary survival open cluster

Kalman-Filtering-Based Frequency Control Strategy Considering Electrolytic Aluminum Load

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Energy Engineering 2022年第4期119卷 1517-1529页

作者： yuqin chen Shihai Yang Yueping Kong Mingming chen Marketing Service Center State Grid Jiangsu Electric Power Co.Ltd.Nanjing210004China

Traditional thermal power units are continuously replaced by renewable energies,of which fluctuations and intermittence impose pressure on the frequency stability of the power *** aluminum load(EAL)accounts for large amount of the local electric loads in some *** participation of EAL in local frequency control has huge application ***,the controller design of EAL is difficult due to the measurement noise of the system frequency and the nonlinear dynamics of the EAL’s electric power *** on this problem,this paper proposes a control strategy for EAL to participate in the frequency *** the controller design of the EAL system,the system frequency response model is established and the EAL transfer function model is developed based on the equivalent circuit of *** the problem of load-side frequency measurement error,the frequency estimation method based on Kalman-filtering is *** improve the performance of EAL in the frequency control,a fuzzy EAL controller is *** testing examples show that the designed Kalman-filter has good performance in de-noising the measured frequency,and the designed fuzzy controller has better performance in stabilizing system frequency than traditional methods.

关键词： Electrolytic aluminum load kalman-filtering frequency control

Discovery of tip induced unconventional superconductivity on Weyl semimetal

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Science Bulletin 2017年第6期62卷 425-430页

作者： He Wang Huichao Wang yuqin chen Jiawei Luo Zhujun Yuan Jun Liu Yong Wang Shuang Jia Xiong-Jun Liu jian Wei Jian Wang International Center for Quantum Materials School of Physics Peking University Beijing 100871 China Collaborative Innovation Center of Quantum Matter Beijing China Center of Electron Microscopy State Key Laboratory of Silicon Materials School of Materials Sdence and Engineering Zhejiang University Hangzhou 310027 China

Weyl fermion is a massless Dirac fermion with definite chirality,which has been long pursued since *** it has not been observed as a fundamental particle in nature,Weyl fermion can be realized as low-energy excitation around Weyl point in Weyl semimetal,which possesses Weyl fermion cones in the bulk and nontrivial Fermi arc states on the surface. As a firstly discovered Weyl semimetal,Ta As crystal possesses 12 pairs of Weyl points in the momentum space,which are topologically protected against small perturbations. Here,we report for the first time the tip induced superconductivity on Ta As crystal by point contact spectroscopy. The zero bias conductance peak as well as a conductance plateau with double conductance peaks and sharp double dips are observed in the point contact spectra simultaneously,indicating unconventional superconductivity. Our further theoretical study suggests that the induced superconductivity may have nontrivial topology. The present work opens a new route in investigating the novel superconducting states based on Weyl materials.

关键词： Tip induced unconventional superconductivity Topological superconductivity Weyl semimetal TaAs Point contact spectroscopy

Potassium ions and cyano group modified g-C3N4 for effective generation of H2O2 through two-electron oxygen reduction

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Science China Chemistry 2025年第1期68卷 192-200页

作者： Dongying Wang Shulan Pu Yongmin chen Ke Lei Yujie Duan Linjiao Mao Xuhui Zeng Xi Luo Yuntao Zhang yuqin Dong Jin Zhong Zhang Yan Sun School of Mechanical Engineering Chengdu University Department of Chemistry and Biochemistry University of California

Potassium ions （K+） doped graphitic carbon nitride （g-C3N4） was prepared by a thermal etching method using potassium hydroxide （KOH） as an ion *** transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy （XPS）results showed that the generation of the cyano group was detected while introducing K+.Under simulated sunlight irradiation,the sample with a K+doping amount of 10%showed the highest hydrogen peroxide （H2O2） generation rate of2,140.2μmol *** apparent quantum yield （AQY） at 400 nm and the solar-to-chemical conversion （SCC） are 4.35%and1.23%,respectively.K+acted as a bridge between g-C3N4layers,which enhanced charge transfer ***,the cyano group enhanced the adsorption capacity of protons （H+） and promoted the yield of *** catalyst exhibited excellent photocatalytic stability based on four-cycle *** addition,a mechanism study showed that superoxide radicals （·O2-）were the most important active species in the reaction *** production of H2O2was achieved through consecutive single-electron *** study deepens the understanding of the oxygen reduction reaction process and opens up a new venue for improving H2O2generation.

关键词： photocatalysis hydrogen peroxide oxygen reduction reaction potassium doping cyano group

中草药副产物的饲料化应用及对育肥猪生长性能、屠宰性能和经济效益的影响

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中国饲料 2023年第16期 126-129页

作者：陈雨芹广西国际商务职业技术学院现代流通学院广西南宁530007

文章旨在分析发酵处理后中草药副产物(发酵复方中药渣制剂)饲料化应用对育肥猪生长性能的影响,试验将120头初始体重在25 kg左右的三元杂交育肥猪随机分为3组,每组4个重复,每个重复10头,对照组饲喂基础日粮,M1、M2组分别在日粮中添加0.5%... 详细信息

文章旨在分析发酵处理后中草药副产物(发酵复方中药渣制剂)饲料化应用对育肥猪生长性能的影响,试验将120头初始体重在25 kg左右的三元杂交育肥猪随机分为3组,每组4个重复,每个重复10头,对照组饲喂基础日粮,M1、M2组分别在日粮中添加0.5%和1.0%的发酵复方中药渣制剂,试验为期90 d,试验结果表明:(1)生长性能:M1、M2组日平均增重(ADG)、末重(FW)显著高于对照组(P<0.05);M2组平均日采食量(ADFI)、料重比(F/G)显著低于对照组(P<0.05);(2)屠宰性能:M2组胴体重(CW)显著高于M1组、对照组(P<0.05);M1、M2组背膘厚(Bt)显著低于对照组(P<0.05),屠宰率(Sr)显著高于对照组(P<0.05);(3)经济效益:与对照组、M1组相比,M2组每头育肥猪饲养经济效益分别提高了28.75%、15.07%。总体而言,发酵复方中药渣制剂能显著改善育肥猪生长性能,提高屠宰性能和经济效益,说明中草药副产物的饲料化应用具有可行性,建议添加比例为1.0%。

关键词：发酵复方中药渣制剂育肥猪生长性能屠宰性能经济效益

Severe pulmonary arterial hypertension with a rare intronic mutation in Caveolin-1 gene:A case report

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Severe pulmonary arterial hypertension with a rare intronic ...

第七届全国呼吸系统重大疾病转化医学学术论坛

作者： Jing liao yuqin chen Meidan Kuang Wenjun He Jian Wang State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangdong Key Laboratory of Vascular DiseaseGuangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical University

＜正＞Introduction:Genetic and genomic variations contribute to multiple forms of pulmonary arterial hypertension （PAH）.At least 20%of Idiopathic PAH （IPAH） cases harbor deleterious causative mutations,resulting in severer disease at a younger *** mutation in the caveolin-1 （CAV1） gene first identified by using whole

关键词：

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基于模板合成法的纳米金柱阵列制备

压电与声光 2012年第6期34卷 955-957页

作者：韩国强陈玉琴福州大学机械工程及自动化学院福建福州350108 中国科学院福建物质结构研究所福建福州350002

基于模板合成法,在多孔氧化铝(PAA)模板上用磁控溅射沉积金薄膜,制备出高度有序的纳米金柱阵列结构。采用扫描电子显微镜(SEM)和原子力显微镜(AFM)对所加工的金柱阵列结构进行表征。所加工的纳米结构为柱状金纳米阵列,金柱直径约为60... 详细信息

基于模板合成法,在多孔氧化铝(PAA)模板上用磁控溅射沉积金薄膜,制备出高度有序的纳米金柱阵列结构。采用扫描电子显微镜(SEM)和原子力显微镜(AFM)对所加工的金柱阵列结构进行表征。所加工的纳米结构为柱状金纳米阵列,金柱直径约为60nm,金柱尖端直径约20nm,高度为300～600nm,相邻金柱平均间距约为100nm。纳米金柱阵列结构与多孔氧化铝模板(PAA)貌一致,阵列分布规则,柱体大小均匀。

关键词：多孔氧化铝模板磁控溅射纳米金柱阵列扫描电子显微镜原子力显微镜

新冠疫情是进行科普教育、提高国民科学素质的契机

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科技导报 2020年第10期38卷 29-30页

作者：陈豫钦王健呼吸疾病国家重点实验室广州呼吸健康研究院广州医科大学附属第一医院广州510230

2020年初春,一场突如其来的疫情给华夏大地带来严峻的考验,国家的综合科技实力是战胜疫情的决定因素。正如习近平总书记所说"人类同疾病较量最有力的武器就是科学技术,人类战胜大灾大疫离不开科学发展和技术创新"。通过此次抗疫,一方面... 详细信息

2020年初春,一场突如其来的疫情给华夏大地带来严峻的考验,国家的综合科技实力是战胜疫情的决定因素。正如习近平总书记所说"人类同疾病较量最有力的武器就是科学技术,人类战胜大灾大疫离不开科学发展和技术创新"。通过此次抗疫,一方面要充分认识中国在基础科学、医疗、工程及社会管理取得的进步;另一方面也要对疫情期间出现的各种不符合科学事实、不尊重科学规律、缺乏科学精神的现象和行为进行反思。

关键词：科普教育华夏大地技术创新基础科学尊重科学科学事实国民科学素质科学技术

Angiopoietin-1 Promote the Integrity of Neovascularization in the Subcutaneous Matrigel of Type 1 Diabetic Rats

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Angiopoietin-1 Promote the Integrity of Neovascularization i...