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44篇 您的检索式:作者名="Jingqi Zhang"
    题名 作者 年代 出处 被引量
1Effect of processing parameters on the densification of an additively manufactured 2024 Al alloy显示文摘Understanding the densification behaviours and formation mechanisms of defects are essential to fabricate high quality and high strength aluminium components using selective laser melting(SLM) technology. In this work, the effects of laser power and scanning speed on the densification, defects evolution and their formation mechanisms in a SLMed 2024 aluminium(Al) alloy were investigated in consideration of the corresponding laser energy input, melting mode transition and microstructural evolution. The results showed that optimizing the processing parameters effectively reduced the porosity level below1% by avoiding the lack of fusion and keyhole melting mode, and minimizing the gas pores. However,optimization of the processing parameters could not eliminate the columnar structure associated with the SLMed 2024 Al alloy, which contributed to the hot-tearing cracks in the SLMed parts. It was found that the dependence of porosity formation on SLM processing parameters was contrary to the crack density. Hence, to further improve the SLM-processability of the 2024 Al alloy it is necessary to develop SLM methods in order avoid the hot-cracking within the optimized processing parameter window associated with the minimum porosity formation.Qiyang Tan Yingang Liu Zhiqi Fan Jingqi Zhang Yu Yin Ming-Xing Zhang 2020Journal of Materials Science & Technology2020,58,23:13
2Binder-Free Activated Carbon/Carbon Nanotube Paper Electrodes for Use in Supercapacitors显示文摘新奇便宜、轻、灵活、平的 rollup 或便携设备为多功能的便携式的电子学被要求并且作为在当代的电池和 supercapacitors 使用的材料的选择开发新万用、灵活的电极材料是关键挑战。这里,为在先进 supercapacitors 的使用的没有文件夹的激活的碳(交流)/carbon nanotube (CNT ) 纸电极基于便宜、工业等级的排列 CNT 被制作了。由砍的一个二拍子的圆舞策略,排列 CNT 被驱散进单个长 CNT,然后交流的 90 wt%99 wt% 粉末被合并到 CNT 肉和 AC/CNT 纸电极被免职在一个过滤器上制作。AC/CNT 纸电极的特定的能力,率表演,和力量密度比对一个交流 / 乙炔黑人电极的相应价值好。电容到达了 267.6 F/g 的最大的价值, CNT 5 wt% 装载,并且精力密度和功率密度是 22.5Guanghui Xu Chao Zheng Qiang Zhang Jiaqi Huang Mengqiang Zhao Jingqi Nie Xianghua Wang Fei Wei 2011Nano Research2011,4,9:6
3Cu Nanoparticles Embedded in N-Doped Carbon Materials for Oxygen Reduction Reaction显示文摘Summary of main observation and conclusion Development of eco-friendly,cost-effective,and high-performance electrocatalysts to replace precious metal platinum for oxygen reduction reaction(ORR)has received increasing attention.Herein,we adopt a facile one-pot strategy to embed Cu nanoparti­cles onto N-doped carbon-graphene(Cu@NC-700).The Cu@NC-700 exhibits robust and efficient ORR catalysis with positive half-wave potential(-0.86 V vs.RHE)and lowTafel slope(33.9 mV-dec^-1)in 0.1 M KOH solution.Meanwhile,it manifests remarkable electrochemical stability,and strong tolerance to methanol crossover and carbon monoxide poisoning.The synergistic effect between Cu-N-C sites,Cu nanoparticles,and N-doped carbon support speeds up ORR electrocatalysis.Xudong Wen Hui Qi Yan Cheng Qiaoqiao Zhang Changmin Hou Jingqi Guan 2020Chinese Journal of Chemistry2020,38,9:5
4Applications of single-atom catalysts显示文摘Owing to unsaturated coordination environment,quantum size effect and metal-support interaction,single-or dual-atom metal sites,such as Mn,Fe,Co,Ni,Cu,Zn,Mo,Ru,Rh,Pd,Ag,Sn,Ir,Pt,Au,Bi,and Er coordinated with nonmetallic elements such as O,N,P,and S,exhibit different electronic configurations,which endow them with high catalytic performances in multiple redox reactions and versatile applications in organic synthesis,environmental remediation,energy conversion,and biomedicine.Despite intense research,the relation of structure-activity for single-atom catalysts(SACs)still bedazzles researchers,since diversified configurations of active sites would bring about difficulty in structural identification and theoretical simulations.Here,recent results on the applications of SACs are reviewed with an emphasis on identifying the active sites and discussing the relation between structure and property.Qiaoqiao Zhang Jingqi Guan 2022Nano Research2022,15,1:5
5Mesenchymal stem cell treatment improves outcome of COVID-19 patients via multiple immunomodulatory mechanisms显示文摘The infusion of coronavirus disease 2019(COVID-19)patients with mesenchymal stem cells(MSCs)potentially improves clinical symptoms,but the underlying mechanism remains unclear.We conducted a randomized,single-blind,placebo-controlled(29 patients/group)phase II clinical trial to validate previous findings and explore the potential mechanisms.Patients treated with umbilical cord-derived MSCs exhibited a shorter hospital stay(P=0.0198)and less time required for symptoms remission(P=0.0194)than those who received placebo.Based on chest images,both severe and critical patients treated with MSCs showed improvement by day 7(P=0.0099)and day 21(P=0.0084).MSC-treated patients had fewer adverse events.MSC infusion reduced the levels of C-reactive protein,proinflammatory cytokines,and neutrophil extracellular traps(NETs)and promoted the maintenance of SARS-CoV-2-specific antibodies.To explore how MSCs modulate the immune system,we employed single-cell RNA sequencing analysis on peripheral blood.Our analysis identified a novel subpopulation of VNN2+hematopoietic stem/progenitorlike(HSPC-like)cells expressing CSF3R and PTPRE that were mobilized following MSC infusion.Genes encoding chemotaxis factors—CX3CR1 and L-selectin—were upregulated in various immune cells.MSC treatment also regulated B cell subsets and increased the expression of costimulatory CD28 in T cells in vivo and in vitro.In addition,an in vivo mouse study confirmed that MSCs suppressed NET release and reduced venous thrombosis by upregulating kindlin-3 signaling.Together,our results underscore the role of MSCs in improving COVID-19 patient outcomes via maintenance of immune homeostasis.Rongjia Zhu Tingdong Yan Yingmei Feng Yan Liu Hongcui Cao Gongxin Peng Yanlei Yang Zhen Xu Jingqi Liu Wei Hou Xiaoyue Wang Zhe Li Luchan Deng Shihua Wang Jing Li Qin Han Hongling Li Guangliang Shan Yinghao Cao Xingyan An Jianshe Yan Zhonghui Zhang Huafei Li Xuebin Qu Jiaqi Zhu Shumin Zhou Jiao Wang Fengchun Zhang Jinming Gao Ronghua Jin Dayong Xu Yan-Qing Ma Tao Huang Shuang Peng Zhi Zheng Ilia Stambler Eric Gilson Lee Wei Lim Alexey Moskalev Antonio Cano Sasanka Chakrabarti Brun Ulfhake Huanxing Su Haoying Xu Sihuan Xu Feng Wei Holly MBrown-Borg Kyung-Jin Min Georgina Ellison-Hughes Calogero Caruso Kunlin Jin Robert Chunhua Zhao 2021Cell Research2021,31,12:5
6Metal-organic framework-derived phosphide nanomaterials for electrochemical applications显示文摘Because of features,such as adjustable structures,high porosity,and high crystallinity,metal-organic frameworks(MOFs)deservedly have received considerable attention.Nevertheless,there is still room for improvements in the electrical conductivity and chemical stability of some MOFs,because of which they cannot be utilized as electrode materials.Fortunately,MOF derivatives have received widespread attention in recent years,especially phosphide materials,which are widely used in practical applications because of their outstanding conductivity,excellent specific surface area,and standout charge mobility.In this review,the latest developments of MOF-derived phosphides in electrocatalysis related to energy,including the excellent performance in terms of electrochemical energy storage and ingenious strategies,and diversified synthetic approaches are emphasized and summarized.Additionally,the arduous task and feasible proposals of MOF-derived phosphides are also discussed.Xinlan Wang Guangxun Zhang Wei Yin Shasha Zheng Qingquan Kong Jingqi Tian Huan Pang 2022Carbon Energy2022,4,2:3
7A Positive Feedback Loop between Mesenchymal-like Cancer Cells and Macrophages Is Essential to Breast Cancer Metastasis显示文摘Shicheng Su Qiang Liu Jingqi Chen Jianing Chen Fei Chen Chonghua He Di Huang Wei Wu Ling Lin Wei Huang Jin Zhang Xiuying Cui Fang Zheng Haiyan Li Herui Yao Fengxi Su Erwei Song 2014Cancer Cell2014,,5:3
8Reduction-induced interface reconstruction to fabricate MoNi_(4) - based hollow nanorods for hydrazine oxidation assisted energysaving hydrogen production in seawater显示文摘Seawater electrolysis could address the water scarcity issue and realize the grid-scale production of carbon-neutral hydrogen,while facing the challenge of high energy consumption and chloride corrosion.Thermodynamically more favorable hydrazine oxidation reaction(HzOR)assisted water electrolysis is efficiency for energy-saving and chlorine-free hydrogen production.Herein,the MoNi alloys supported on MoO_(2) nanorods with enlarged hollow diameter on Ni foam(MoNi@NF)are synthesized,which is constructed by limiting the outward diffusion of Ni via annealing and thermal reduction of NiMoO_(4) nanorods.When coupling HzOR and hydrogen evolution reaction(HER)by employing MoNi@NF as both anode and cathode in two-electrode seawater system,a low cell voltage of 0.54 V is required to achieve 1,000 mA·cm^(−2) and with long-term durability for 100 h to keep above 100 mA·cm^(−2) and nearly 100%Faradaic efficiency.It can save 2.94 W·h to generate per liter H_(2) relative to alkaline seawater electrolysis with 37%lower energy equivalent input.Lili Guo Qingping Yu Xuejun Zhai Jingqi Chi Tong Cui Yu Zhang Jianping Lai Lei Wang 2022Nano Research2022,15,10:2
9Magnetic resonance imaging-guided and targeted theranostics of colorectal cancer显示文摘Colorectal cancer(CRC)is the most common gastrointestinal tract cancer worldwide and is associated with high morbidity and mortality.The development of nanosized drug delivery systems has provided a new direction in CRC treatment.Among these systems,magnetic nanoparticle(MNP)-based multifunctional platforms provide a novel strategy for magnetic resonance imaging(MRI)-related cancer theranostics.At the beginning o f this original review,the carcinogenesis and treatment status o f CRC are summarized.Then,diversified preparation and functionalization methods of MNPs are systematically analyzed,followed by MRIinvolved theranostic strategies.The latest progress in MRI-mediated multimode diagnosis and image-guided targeted therapy in CRC management is the main focus.Finally,the major challenges in promoting MRI-induced precise theranostics of CRC in clinical practice are discussed.Yanan Li Jingqi Xin Yongbing Sun Tao Han Hui Zhang Feifei An 2020Cancer Biology & Medicine2020,17,2:2
10The Main Characteristics and Disposal of Municipal Garbage in Changchun City of China显示文摘Based on current situations of Chinese garbage management and disposal, this paper is centered on introduction of some research results of household garbage in Changchun, capital city of Jilin Province, northeast China. From the viewpoint of man the earth system, garbage is characterized by sociality, temporal and spatial differentiation and limitation and other features, which imply that the garbage research being involved with natural science and social science should not only focus on the natural features but also on the social features. Compared to some developed cities, the material composition of garbage in Changchun is typically characterized by high moisture content, low combustion value and minor recyclable materials. Concentration, cycle shaping and self similarity characterize the garbage distribution. The tracing investigation on 683 households ten times shows that three fourths of the total garbage yield in Changchun is derived from non domestic units and that the attention of garbage management, especially source reduction, should be focused on the non domestic units. The GM(1,1) prediction model has been set up and the prediction result shows that the amount of garbage yield of Changchun in 2004 will be up to 1,500,000 tons. Investigation of environmental consciousness to garbage problems have been carried out. Based on the above characteristics of garbage, the disposal countermeasures of Changchun garbage have been suggested.Su Xiaosi, Zhang Yixia, Yan Jingqi, Jin Wei and Sun Jiapeng (Changchun University of Science and Technology, Changchun,China, 130026) 1999Global Geology1999,4,1:2
11An electron backscattered diffraction study on the dynamic recrystallization behavior of a nickel–chromium alloy (800H) during hot deformation显示文摘Yu Cao Hongshuang Di Jingqi Zhang Jiecen Zhang Tianjun Ma R.D.K. Misra 2013Materials Science & Engineering A2013,,:2
12Unique Characteristics of Vertical Carbon Nanotube Field-effect Transistors on Silicon显示文摘A vertical carbon nanotube field-effect transistor(CNTFET) based on silicon(Si) substrate has been proposed and simulated using a semi-classical theory. A single-walled carbon nanotube(SWNT) and an n-type Si nanowire in series construct the channel of the transistor. The CNTFET presents ambipolar characteristics at positive drain voltage(Vd) and n-type characteristics at negative Vd. The current is significantly influenced by the doping level of n-Si and the SWNT band gap. The n-branch current of the ambipolar characteristics increases with increasing doping level of the n-Si while the p-branch current decreases. The SWNT band gap has the same influence on the p-branch current at a positive Vd and n-type characteristics at negative Vd. The lower the SWNT band gap, the higher the current. However, it has no impact on the n-branch current in the ambipolar characteristics. Thick oxide is found to significantly degrade the current and the subthreshold slope of the CNTFETs.Jingqi Li Weisheng Yue Zaibing Guo Yang Yang Xianbin Wang Ahad A.Syed Yafei Zhang 2014Nano-Micro Letters2014,6,3:2
13Genetic diversity and relatedness analysis of nine wild species of tree peony based on simple sequence repeats markers显示文摘Tree peony has nine wild species,but the evolutionary relationship of them is still unclear.Here,a total of 274 specimens from 22 natural populations of nine wild species were collected,and their genetic diversity and similarity was analyzed based on Simple Sequence Repeats(SSR)molecular markers.A total of 106 alleles were generated based on 20 primers and with an average of 5.3 alleles per primer.Shannon’s information index(I)ranged from 0.6333 to 1.7842,and the average of Nei’s genetic diversity coefficient(H)was 0.5771.Polymorphism Information Content(PIC)value varied from 0.29 to 0.77,ten of these primers had high polymorphism(PIC≥0.50).All the above genetic parameters of primers reflect more rich genetic diversity information compared with other researches using SSR molecular markers to study the genetic diversity of tree peony wild species.At the population level,the lowest and highest degree of genetic diversity occurred in Paeonia ludlowii-P1 and P.delavayi-P3 population,respectively.Whereas at species level,the genetic diversity of 9 wild peony species was as follows:P.lutea>P.delavayi>P.rockii>P.qiui>P.ostii>P.decomposita>P.potaninii>P.spontanea>P.ludlowii.Furthermore,cluster analysis at species level divided the nine wild tree peony species into two branches.In branch I,the closest phylogenetic relationship was found between P.ostii and P.rockii,followed by P.spontanea,P.qiui,and P.decomposita.In branch II,the closest relationship occurred between P.lutea and P.delavayi,followed by P.potaninii and P.ludlowii.Clustering results supported the division of tree peonies into two subsects(Delavayanae and Vaginatae),it also supported P.potaninii and P.ludlowii as independent species.The results provided novel insight into the genetic diversity and phylogenetic relationship of nine wild tree peony species.It will help formulate comprehensive protection measures of wild germplasm resources and select proper parents for distant hybridization in the future.Yuqian Xue Rong Liu Jingqi Xue Shunli Wang Xiuxin Zhang 2021Horticultural Plant Journal2021,7,6:1
14Fabrication of Carbon Nanotube Field Effect Transistors by AC Dielectrophoresis Method显示文摘Jingqi Li Qing Zhang Dajiang Yang Jingze Tian 2004Carbon2004,42,:1
15Application of CFD in the optimal design of a SCR–DeNO x system for a 300MW coal-fired power plant显示文摘YuanYuan Xu Yan Zhang Jingcheng Wang JingQi Yuan 2013Computers and Chemical Engineering2013,,:1
16显示文摘Li Jingqi Zhang Jihua Guo Wantu 2002Diamond and Related Materials2002,,11:1
17Annealing Effects on Electric Contacts between Carbon Nanotubes and Electrodes 显示文摘Jingqi Li Qing Zhang 2006International Journal of Nanoscience2006,5,4:1
18Individualized Treatment and Palliative Care for A90-Year-Old Patient with Primary Gastric Diffuse Large-B Cell Lymphoma:4 Year Follow-up and Inspiration显示文摘A 90-year-old man was diagnosed with primary gastric diffuse large B-cell lymphoma(PGDLBL)by PET/CT examination,gastroscopy,biopsy and histopathological analysis at a regular physical check in April,2016.The patient received R-CO chemotherapy(rituximab,cyclophosphamide,and vincristine)and radiotherapy subsequently,with enteral nutritional treatment through 3-cavity nasogastric tube due to development of pyloric obstruction.To satisfy patient's strong desire of eating by himself,we performed surgery of exploratory laparotomy and Roux-en-Y gastric bypass(RGB)to relieve pylorus obstruction.Postoperatively,the patient resumed oral feeding,supplemented by nasogastric tube feeding at 1350-1550 Kcal daily.He is now 94 years old with fairly well nutrition and normal communication.The outcome of 4 year follow-up suggests that nutritional treatment and palliative medicine are important for improving prognosis and life-quality of very elderly patients with end-stage tumors apart from the effective chemotherapy,radiotherapy,and surgery.Yanjie Cao Jingqi Duan Lifang Liu Xuan Wei Li Ren Lanning Zhang Wei Zhang 2021Chinese Medical Sciences Journal2021,36,1:1
19On the role of physiological substances, abscisic acid and its biosynthetic genes in seed maturation and dormancy of tree peony (Paeonia ostii 'Feng Dan' ) 显示文摘Jingqi Xue Shunli Wang Ping Zhang 2015Biochemical and Biophysical Research Communications2015,459,3:1
20Prediction of the performance of an algorithm for the detection of small targets in infrared images显示文摘Jun X Jingqi Zhang Changhong Liang 2001Infrared Physics & Technology2001,42,1:1
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