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Innovative design and optimization of a two-dimensional deployable nine-grid planar antenna mechanism with a flat reflection surface

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Chinese Journal of Aeronautics 2023年第11期36卷 529-550页

作者： Bo CHEN Ze JIANG Xinlu WEI Luyao GUO Xin ZHOU Yundou XU junjie qian Yongsheng ZHAO Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan UniversityQinhuangdao 066004China Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of National Education Yanshan UniversityQinhuangdao 066004China Space Structure and Mechanism Technology Laboratory of China Aerospace Science and Technology Group Co.Ltd Shanghai 201109China Aerospace System Engineering Shanghai Shanghai 201109China

With the development of the aerospace industry,space missions are becoming more complicated and diversified,and there is a demand for antenna mechanisms with a larger physical *** this paper,a planar deployable mechanism is proposed,which can form a flat reflection surface with a small gap between *** this end,a novel large-scale two-dimensional deployable nine-grid planar antenna mechanism is ***,two antenna folding schemes and four supporting mechanism schemes are *** comparison analysis,the antenna configuration scheme with the best comprehensive performance is selected.A kinematic model of the deployable mechanism is established,and its kinematic characteristics are ***,the correctness of the kinematic model is verified by comparing the analytical and simulation results of the kinematic ***,a finite element model of the antenna is *** on the response surface method,the structural parameters of the support rods of the antenna are optimized,and a set of optimized solutions with lightweight and high fundamental frequency characteristics are ***,a prototype of the proposed nine-grid planar antenna is *** feasibility of the deployment principle and the rationality of the designed mechanism are verified by deployment experiments.

关键词： Design optimization Kinematics Planar antenna Structural design Two-dimensional expansion

Synthesis of SiOC@C ceramic nanospheres with tunable electromagnetic wave absorption performance

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Journal of Advanced Ceramics 2024年第9期13卷 1394-1408页

作者： junjie qian Dandan Ma Xiaoling Zhou Huoming Liao Qingliang Shan Shaohua Wang Yongqing Wang Xiaojun Zeng School of Materials Science and Engineering Jingdezhen Ceramic UniversityJingdezhen 333403China School of Mechanical and Electronic Engineering Jingdezhen Ceramic UniversityJingdezhen 333403China School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China

SiOC-based ceramics are considered promising electromagnetic wave-absorbing materials because of their lightweight,high-temperature resistance,and heat insulation ***,SiOC@C ceramic nanospheres were prepared using a liquid-phase method combined with a polymer-derived ceramic(PDC)method,followed by heat treatment in N_(2) and Ar atmospheres at different *** morphology,microstructure,phase composition,and electromagnetic wave absorption performance of the SiOC@C ceramic nanospheres were investigated in *** SiOC@C ceramic nanospheres obtained in the Ar atmosphere showed a minimum reflection loss(RL_(min))of−67.03 dB,whereas the SiOC@C ceramic nanospheres obtained in the N_(2) atmosphere exhibited an RLmin value of−63.76 *** outstanding electromagnetic wave absorption performance of the SiOC@C ceramic nanospheres was attributed to the synergistic effect between conductive loss,interfacial/defect polarization loss,multiple reflections,and ***,this research provides valuable insights into the design and fabrication of SiOC ceramic-based electromagnetic wave absorbers.

关键词： SiOC ceramic nanospheres electromagnetic wave absorption performance polymer-derived ceramics(PDCs) free carbon

M2-type macrophage membrane-mediated delivery of Carvedilol nanocomplex for acute liver failure treatment and remodeling inflammatory microenvironment

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Nano Research 2024年第7期17卷 6362-6375页

作者： Mingge Shang Yaohui Zhang junjie qian Wenchao Wang Xizhi Yu Jiacheng Huang Lin Zhou Shusen Zheng Division of Hepatobiliary and Pancreatic Surgery Department of SurgeryThe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China NHC Key Laboratory of Combined Multi-organ Transplantation Key Laboratory of Organ TransplantationHangzhou 310003China Key Laboratory of the diagnosis and treatment of organ Transplantation Research Unit of Collaborative Diagnosis and Treatment for Hepatobiliary and Pancreatic CancerChinese Academy of Medical Sciences(2019RU019)Hangzhou 310003China State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesHangzhou 310003China Department of Thyroid Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Shulan(Hangzhou)Hospital Affiliated to Zhejiang Shuren University Shulan International Medical College Hangzhou 310000China

Interactions of hepatic macrophages with local inflammatory microenvironment is the key factor promoting the development of acute liver failure(ALF).Hence,reprogramming pro-inflammatory M1 into anti-inflammatory M2 phenotype may offer a promising strategy for treating ALF by targeting *** group found Carvedilol possessed potential anti-inflammatory property previously,which had been scarcely reported in *** present a synergy strategy to induce macrophages into the phenotype M2-type anti-inflammatory macrophages with interleukin-4(IL-4)and IL-10 at *** Carvedilol is loaded on the macrophage membrane-camouflaged biomimetic nano-platform(termed as M2M@CNP)to evade reticuloendothelial system(RES)and afford Carvedilol delivery to the inflammatory environment with overproduced reactive oxygen species(ROS),further prolonging its circulation and *** released Carvedilol produced anti-inflammatory,antioxidant and anti-apoptosis effects,combining local M2-type cell membranes(M2-CM)inhibited pro-inflammatory cytokines and ROS levels,which in turn promoted and amplified M1 to M2 phenotype polarization *** study offers new insights into the rational design of biomimetic nanosystems for safe and effective ALF therapy to accelerate the clinical translation.

关键词： acute liver failure hepatic drug delivery M2 macrophage-camouflaged nanoplatform inflammatory microenvironment macrophage polarization

Minimizing interfacial energy losses in inverted perovskite solar cells by a dipolar stereochemical 2D perovskite interface

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Journal of Energy Chemistry 2024年第3期90卷 496-503,I0011页

作者： junjie qian Jingjing He Qihang Zhang Chenyue Zhu Shilin Chen Zhanpeng Wei Xuesong Leng Ziren Zhou Benben Shen Yu Peng qiang Niu Shuang Yang Yu Hou Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China National Enterprise Technology Center Inner Mongolia Erdos Electric Power and Metallurgy Group Company LimitedOrdos 016064Inner MongoliaChina

Inverted perovskite solar cells(PSCs) have attracted broad research and industrial interest owing to their suppressed hysteresis,cost-effectiveness,and ***,the issue of non-radiative recombination losses at the n-type interface between the perovskite and fullerene has impeded further improvement of photovoltaic ***,we modify the n-type interface of FAPbI_(3) perovskite films by constructing a stereochemical two-dimensional(2D) perovskite interlayer,in which the organic cations comprise both pyridine and ammonium *** pyridine N donor can create stable bonding with the surface-uncoordinated Pb on the perovskite,thereby passivating the shallow-level defects and enhancing the air stability of the ***,the pyridine N donor also offers a positive polar interface to decrease the surface work function of the perovskite film,enabling n-type ***,we employ a p-i-n photovoltaic(PV) device with the positive dipole interlayer at perovskite/fullerene contact and achieve remarkable photoelectric conversion efficiency(PCE) of 22.0%.

关键词： Perovskite solar cells Dipole interlayer Stereochemistry Non-radiative recombination

Integrative analysis of the transcriptome and metabolome reveals the importance of hepatokine FGF21 in liver aging

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Genes & Diseases 2024年第5期11卷 407-427页

作者： Wenchao Wang junjie qian Mingge Shang Yiting Qiao Jiacheng Huang Xinxin Gao Zhou Ye Xinyu Tong Kangdi Xu Xiang Li Zhengtao Liu Lin Zhou Shusen Zheng Division of Hepatobiliary and Pancreatic Surgery Department of SurgeryFirst Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhouZhejiang 310003China NHC Key Laboratory of Combined Multi-organ Transplantation HangzhouZhejiang 310003China Key Laboratory of the Diagnosis and Treatment of Organ Transplantation Research Unit of Collaborative Diagnosis and Treatment for Hepatobiliary and Pancreatic CancerChinese Academy of Medical Sciences(2019RU019)HangzhouZhejiang 310003China Key Laboratory of Organ Transplantation Research Center for Diagnosis and Treatment of Hepatobiliary DiseasesHangzhouZhejiang 310003China Shulan International Medical College Zhejiang Shuren UniversityHangzhouZhejiang 310015China Shulan(Hangzhou)Hospital Affiliated to Zhejiang Shuren University Shulan International Medical College HangzhouZhejiang 310000China

Aging is a contributor to liver ***,the concept of liver aging has become prominent and has attracted considerable interest,but its underlying mechanism remains poorly *** our study,the internal mechanism of liver aging was explored via multi-omics analysis and molecular experiments to support future targeted *** aged rat liver model was established with D-galactose,and two other senescent hepatocyte models were established by treating HepG2 cells with D-galactose and *** then performed transcriptomic and metabolomic assays of the aged liver model and transcriptome analyses of the senescent hepatocyte *** livers,genes related to peroxisomes,fatty acid elongation,and fatty acid degradation exhibited down-regulated expression with aging,and the hepatokine Fgf21 expression was positively correlated with the down-regulation of these *** senescent hepatocytes,similar to the results found in aged livers,FGF21 expression was also ***,the expressions of cell cycle-related genes were significantly down-regulated,and the down-regulated gene E2F8 was the key cell cycle-regulating transcription *** then validated that FGF21 overexpression can protect against liver aging and that FGF21 can attenuate the declines in the antioxidant and regenerative capacities in the aging *** successfully validated the results from cellular and animal experiments using human liver and blood *** study indicated that FGF21 is an important target for inhibiting liver aging and suggested that pharmacological prevention of the reduction in FGF21 expression due to aging may be used to treat liver aging-related diseases.

关键词： Antioxidant capability FGF21 Liver aging Liver regeneration Multiomics analysis

Blocking Amino acid transporter OsAAP3 improves grain yield by promoting outgrowth buds and increasing tiller number in rice

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Blocking Amino acid transporter OsAAP3 improves grain yield ...

基于不同租住模式的加工制造园区周边社会空间分异研究——以漕河泾出口加工区浦江分园周边社区为例

2018中国作物学会学术年会

作者：吕凯吴博文 Jie Wang Wei Zhu Haipeng Nie junjie qian Weiting Huang 方中明 Center of Applied Biotechnology Wuhan Institute of Bioengineering National Key Laboratory of Crop Genetic Improvement College of Plant Science and technologyHuazhong Agricultural University

Amino acid transporters(AATs) play indispensable roles in nutrient allocation during plant *** this study,we demonstrate that inhibiting expression of the rice amino acid transporter OsAAP3 increases grain yield due to a formation of larger numbers of tillers as a result of increased bud *** expression of OsAAP3 in transgenic plants resulted in higher amino acid concentrations of Lys,Arg,His,Asp,Ala,Gln,Gly,Thr and Tyr,and inhibited bud outgrowth and rice ***,RNAi of OsAAP3 significantly decreased Arg,Lys,Asp,and Thr concentrations to a small extent,and thus promoted bud outgrowth,significantly increased tiller number and effective panicle number per plant,and further enhanced grain yield and nitrogen use efficiency(NUE).The promoter sequences of OsAAP3 showed some divergence between Japonica and Indica rice,and expression of the gene was higher in Japonica,which produced fewer tillers than *** generated knockout-lines of OsAAP3 on Japonica ZH11 and KY131 using CRISPR technology and found that grain yield could be significantly *** results suggested that manipulation of OsAAP3 expression could be used to increase grain yield in rice.

关键词： amino acid transporter rice grain yield tiller outgrowth bud

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地域研究与开发 2012年第4期31卷 23-28页

作者：孔翔唐海燕钱俊杰华东师范大学中国现代城市研究中心科技创新与发展战略研究中心上海200062 上海立信会计学院上海201620

加工制造园区往往是外来农民工集聚的空间,由于就业状况、收入水平、随迁家庭情况等差异,外来农民工可能选择不同的租住模式,从而与当地人形成不同的混居形态和交流环境,社会空间分异的方式和程度也会有所不同。以上海漕河泾出口加工区... 详细信息

加工制造园区往往是外来农民工集聚的空间,由于就业状况、收入水平、随迁家庭情况等差异,外来农民工可能选择不同的租住模式,从而与当地人形成不同的混居形态和交流环境,社会空间分异的方式和程度也会有所不同。以上海漕河泾出口加工区浦江分园的典型周边社区为研究对象,重点通过对居民日常生活空间和情感空间的调研访谈,初步探索了不同租住模式下社会空间的隔阂状态及其形成机制。研究显示,不同租住模式下,外来农民工与本地失地农民的接触方式和交流效率存在一定差异,而促进有效地交流对于消除隔阂具有重要价值,因此,租住模式的优化关键要有利于形成农民工与当地人平等、友好交流的环境。

关键词：社会空间分异租住模式漕河泾出口加工区浦江分园

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苏锡常地区公路交通发生吸引量影响因素探讨

现代交通技术 2013年第5期10卷 82-86页

作者：钱俊杰江苏省交通科学研究院股份有限公司江苏南京210017

为提高交通发生吸引量的预测精度,采用逐步回归法进行自变量选取,提出了新的交通量影响因素,并以长三角苏锡常地区的客货车交通发生吸引量预测为例进行了分析。

关键词：公路交通量发生吸引量逐步回归法影响因素预测精度

新型N-TiO_2的固相法制备及其光催化性能

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催化学报 2011年第8期32卷 1430-1435页

作者：马鹏举闫国田钱俊杰张敏杨建军河南大学特种功能材料教育部重点实验室河南开封475004

以纳米管钛酸为前驱体,以NH4HCO3为N源,先机械研磨使二者混合均匀,再在Ar保护下,于不同温度焙烧4h制得N掺杂TiO2(N-TiO2),并采用X射线粉末衍射、X射线光电子能谱、紫外-可见吸收光谱、透射电镜及N2吸附-脱附对样品进行了表征.结果显示,... 详细信息

以纳米管钛酸为前驱体,以NH4HCO3为N源,先机械研磨使二者混合均匀,再在Ar保护下,于不同温度焙烧4h制得N掺杂TiO2(N-TiO2),并采用X射线粉末衍射、X射线光电子能谱、紫外-可见吸收光谱、透射电镜及N2吸附-脱附对样品进行了表征.结果显示,N以间隙掺杂方式进入TiO2晶格内.在热处理过程中,生成中间体(NH4)2Ti2O4(OH)2,它不仅可在升温过程中缓慢分解并释放出N,使其更均匀地进入TiO2,同时可产生更多的氧空位,显著提高了N-TiO2对光的响应能力.另外,N的掺杂可抑制N-TiO2锐钛矿相向金红石相转化.当焙烧温度为500°C,n(N)/n(Ti)=4时,所制N-TiO2样品经光照130min,可使甲基橙完全降解,其活性比未掺杂N的样品提高近30%.

关键词：氮掺杂固相法光催化纳米管钛酸纳米管钛酸盐