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| 1 | A review of selective laser melting of aluminum alloys: Processing,microstructure, property and developing trends显示文摘Selective laser melting(SLM) is an attractive rapid prototyping technology for the fabrication of metallic components with complex structure and high performance. Aluminum alloy, one of the most pervasive structural materials, is well known for high specific strength and good corrosion resistance. But the poor laser formability of aluminum alloy restricts its application. There are problems such as limited processable materials, immature process conditions and metallurgical defects on SLM processing aluminum alloys. Some efforts have been made to solve the above problems. This paper discusses the current research status both related to the scientific understanding and technology applications. The paper begins with a brief introduction of basic concepts of aluminum alloys and technology characterization of laser selective melting. In addition, solidification theory of SLM process and formation mechanism of metallurgical defects are discussed. Then, the current research status of microstructure, properties and heat treatment of SLM processing aluminum alloys is systematically reviewed respectively. Lastly, a future outlook is given at the end of this review paper. | Jinliang Zhang Bo Song Qingsong Wei Dave Bourell Yusheng Shi | 2019 | Journal of Materials Science & Technology2019，35，2： | 77 |
| 2 | Protection against water or mud inrush in tunnels by grouting:A review显示文摘Grouting is a major method used to prevent water and mud inrush in tunnels and underground engineering.In this paper,the current situation of control and prevention of water and mud inrush is summarized and recent advances in relevant theories,grout/equipment,and critical techniques are introduced.The time-variant equations of grout viscosity at different volumetric ratios were obtained based on the constitutive relation of typical fast curing grouts.A large-scale dynamic grouting model testing system(4000 mm × 2000 mm × 5 mm) was developed,and the diffusions of cement and fast curing grouts in dynamic water grouting were investigated.The results reveal that the diffusions of cement grouts and fast curing grouts are U-shaped and asymmetric elliptical,respectively.A multiparameter real-time monitoring system(φ = 1.5 m,h = 1.2 m) was developed for the grouting process to study the diffusion and reinforcement mechanism of grouting in water-rich faulted zone.A high early strength cream-type reinforcing/plugging grout,a high permeability nano-scale silica gel grout,and a high-expansion filling grout were proposed for the control of water hazards in weak water-rich faulted zone rocks,water inrush in karst passages,and micro-crack water inrush,respectively.Complement technologies and equipment for industrial applications were also proposed.Additionally,a novel full-life periodic dynamic water grouting with the critical grouting borehole as the core was proposed.The key techniques for the control of water inrush in water-rich faulted zone,jointed fissures and karst passages,and micro-crack water inrush were developed. | Shucai Li Rentai Liu Qingsong Zhang Xiao Zhang | 2016 | Journal of Rock Mechanics and Geotechnical Engineering2016，8，5： | 27 |
| 3 | Predicting geological hazards during tunnel construction显示文摘The complicated geological conditions and geological hazards are challenging problems during tunnel construction,which will cause great losses of life and property.Therefore,reliable prediction of geological defective features,such as faults,karst caves and groundwater,has important practical significances and theoretical values.In this paper,we presented the criteria for detecting typical geological anomalies using the tunnel seismic prediction(TSP) method.The ground penetrating radar(GPR) signal response to water-bearing structures was used for theoretical derivations.And the 3D tomography of the transient electromagnetic method(TEM) was used to develop an equivalent conductance method.Based on the improvement of a single prediction technique,we developed a technical system for reliable prediction of geological defective features by analyzing the advantages and disadvantages of all prediction methods.The procedure of the application of this system was introduced in detail.For prediction,the selection of prediction methods is an important and challenging work.The analytic hierarchy process(AHP) was developed for prediction optimization.We applied the newly developed prediction system to several important projects in China,including Hurongxi highway,Jinping II hydropower station,and Kiaochow Bay subsea tunnel.The case studies show that the geological defective features can be successfully detected with good precision and efficiency,and the prediction system is proved to be an effective means to minimize the risks of geological hazards during tunnel construction. | Shucai Li Shuchen Li Qingsong Zhang Yiguo Xue Bin Liu Maoxin Su Zhechao Wang Shugang Wang | 2010 | Journal of Rock Mechanics and Geotechnical Engineering2010，2，3： | 25 |
| 4 | Differences in microstructure and properties between selective laser melting and traditional manufacturing for fabrication of metal parts: A review显示文摘(直线波松) 作为生产技术的添加剂之一,选择激光融化广泛地被调查制作金属部分。在直线波松,部分以一种 layer-by-layer 方式从粉末直接被生产;直线波松也提供几个优点,例如有高三维的精确性的复杂部分的生产,与生产技术的另外的添加剂相比。因此,直线波松能在航空学被使用,航天学,药,并且死并且铸造工业。然而,这种技术不同于传统的方法,例如扔并且前进;例如,前者极大地以产品的微观结构和性质不同。这份报纸通过直线波松在金属材料制造上总结相关研究。基于在 Huazhong 大学 Sci 技术完成的一个工作,快速的 Manuf。中心(HUST-RMC ) 并且与在其它描述的特征相比,直线波松的报导研究,微观结构,性质,维的精确性,和应用被介绍。 | Bo SONG Xiao ZHAO Shuai LI Changjun HAN Qingsong WEI Shifeng WEN Jie LIU Yusheng SHI | 2015 | Frontiers of Mechanical Engineering2015，10，2： | 26 |
| 5 | Microstructure Characteristics of Inconel 625 Superalloy Manufactured by Selective Laser Melting显示文摘Selective laser melting(SLM), an additive manufacturing process, is capable of manufacturing metallic parts with complex shapes directly from computer-aided design(CAD) models. SLM parts are created on a layer-by-layer manner, making it more flexible than traditional material processing techniques. In this paper, Inconel 625 alloy, a widely used material in the aerospace industry, were chosen as the build material. Scanning electron microscopy(SEM), electron back scattering diffraction(EBSD) and X-ray diffraction(XRD) analysis techniques were employed to analyze its microstructure. It was observed that the molten pool was composed of elongated columnar crystal. Due to the rapid cooling speed, the primary dendrite arm space was approximately 0.5 μm and the hardness of SLM state was very high(343 HV). The inverse pole figure(IPF) indicated that the growing orientation of the most grains was<001> due to the epitaxial growth and heat conduction. The XRD results revealed that the austenite structure with large lattice distortion was fully formed. No carbides or precipitated phases were found.After heat treatment the grains grew into two microstructures with distinct morphological characters,namely, rectangular grains and limited in the molten pool, and equiaxed grains along the molten boundaries. Upon experiencing the heat treatment, MC carbides with triangular shapes gradually precipitated. The results also identified that a large number of zigzag grain boundaries were formed. In this study, the grain formation and microstructure, and the laws of the molten pool evolution were also analyzed and discussed. | Shuai Li Qingsong Wei Yusheng Shi Zicheng Zhu Danqing Zhang | 2015 | Journal of Materials Science & Technology2015，31，9： | 24 |
| 6 | 星载可展开有源相控阵天线结构的研究进展显示文摘星载可展开有源相控阵天线作为空间通信、电子侦察、导航、环境监测等卫星系统的'眼睛'和'耳朵',通过空间可展开结构实现较大的物理口径,利用有源相控阵体制实现独立控制多个点波束,克服了传统机械扫描天线的诸多缺点,已成为宇航领域的关键装备之一。总结星载有源相控阵天线发展历程,分析星载有源相控阵天线的结构形式、性能要求及应用情况,阐述国内外研究现状,并对其涉及的七项关键结构技术做了概要解析,探讨星载可展开有源相控阵天线结构领域的未来研究方向。 | 王从思 韩如冰 王伟 王猛 TU Qingsong 平丽浩 | 2016 | 机械工程学报2016，52，5： | 22 |
| 7 | Molecular evolution and functional divergence of HAK potassium transporter gene family in rice(Oryza sativa L.)显示文摘The high-affinity K+(HAK) transporter gene family is the largest family in plant that functions as potassium transporter and is impor-tant for various aspects of plant life.In the present study,we identified 27 members of this family in rice genome.The phylogenetic tree divided the land plant HAK transporter proteins into 6 distinct groups.Although the main characteristic of this family was established before the origin of seed plants,they also showed some differences between the members of non-seed and seed plants.The HAK genes in rice were found to have expanded in lineage-specific manner after the split of monocots and dicots,and both segmental duplication events and tandem duplication events contributed to the expansion of this family.Functional divergence analysis for this family provided statis-tical evidence for shifted evolutionary rate after gene duplication.Further analysis indicated that both point mutant with positive selection and gene conversion events contributed to the evolution of this family in rice. | Zefeng Yang Qingsong Gao Changsen Sun Wenjuan Li Shiliang Gu Chenwu Xu | 2009 | Journal of Genetics and Genomics2009，36，3： | 21 |
| 8 | A Review of 3D Printing Technology for Medical Applications显示文摘 | Ojan Yan Hanhua Dong Jin Su Jianhua Han Bo Song Qingsong wei Yusheng Shi | 2018 | Engineering2018，4，5： | 20 |
| 9 | Fossils of Quercus sect. Heterobalanus can help explain the uplift of the Himalayas显示文摘Using data from previous research on Quercus sect. Heterobalanus, the coexistence approach to Xix-abangma and Namling fossil sets, and altitudinal ranges of vegetation presented by fossil floras, a re-view and reevaluation have been made of existing theories on the uplift of the Himalayas, especially the palaeoaltitudes of Xixabangma and Namling in Tibet. The Xixabangma fossil set has a palaeoaltitude range of 2500―3500 m, and has risen 2200―3400 m since the Pliocene. The lower and upper assem-blages of the Miocene Namling had palaeoaltitudes of 2500―3000 m and 2800―3000 m, respectively. Therefore, Namling has risen at least 1300 m since the Miocene, thereby challenging some existing theories that suggest Namling has been static since the Miocene. | ZHOU ZheKun YANG QingSong XIA Ke | 2007 | Chinese Science Bulletin2007，52，2： | 16 |
| 10 | A recording phase lag between ocean and continent climate changes: constrained by the Matuyama/Brunhes polarity boundary显示文摘The Matuyama/Brunhes polarity boundary (MBPB) is recorded in Chinese loess L8, which is associated with the glacial period. It is proved that loess L8 is capable of recording earth’s secular variation, and the lock-in depth in Chinese loess is no more than that of marine sediments. Comparison with the location of MBPB in Chinese loess and marine sediments, it is put forward that there is a recording phase lag between ocean and continent climate changes. | Rixiang Zhu Yongxin Pan Bin Guo Qingsong Liu | 1998 | Chinese Science Bulletin1998，43，19： | 16 |
| 11 | 0.04 degree-per-hour MEMS disk resonator gyroscope with high-quality factor (510 k) and long decaying time constant(74.9 s)显示文摘The disk resonator gyroscope is an attractive candidate for high-performance MEMS gyroscopes.This gyroscope consists of a sensor and readout electronics,and the characteristics of the sensor directly determine the performance.For the sensor,a high-quality factor and long decaying time constant are the most important characteristics required to achieve high performance.We report a disk resonator gyroscope with a measured quality factor of 510 k and decaying time constant of 74.9 s,which is a record for MEMS silicon disk resonator gyroscopes,to the best of our knowledge.To improve the quality factor of the DRG,the quality factor improvement mechanism is first analyzed,and based on this mechanism two stiffness-mass decoupled methods,i.e.,spoke length distribution optimization and lumped mass configuration design,are proposed and demonstrated.A disk resonator gyroscope prototype is fabricated based on these design strategies,and the sensor itself shows an angle random walk as low as 0.001°/√h,demonstrating true potential to achieve navigation-grade performance.The gyroscope with readout electronics shows an angle random walk of 0.01°/√h and a bias instability of 0.04°/h at room temperature without compensation,revealing that the performance of the gyroscope is severely limited by the readout electronics,which should be further improved.We expect that the quality factor improvement methods can be used in the design of other MEMS gyroscopes and that the newly designed DRG can be further improved to achieve navigation-grade performances for high-end industrial,transportation,aerospace,and automotive applications. | Qingsong Li Dingbang Xiao Xin Zhou Yi Xu Ming Zhuo Zhanqiang Hou Kaixuan He Yongmeng Zhang Xuezhong Wu | 2018 | Microsystems & Nanoengineering2018，4，1： | 16 |
| 12 | Hierarchical method of task assignment for multiple cooperating UAV teams显示文摘The problem of task assignment for multiple cooperating unmanned aerial vehicle(UAV) teams is considered. Multiple UAVs forming several small teams are needed to perform attack tasks on a set of predetermined ground targets. A hierarchical task assignment method is presented to address the problem. It breaks the original problem down to three levels of sub-problems: target clustering, cluster allocation and target assignment. The first two sub-problems are centrally solved by using clustering algorithms and integer linear programming, respectively, and the third sub-problem is solved in a distributed and parallel manner, using a mixed integer linear programming model and an improved ant colony algorithm. The proposed hierarchical method can reduce the computational complexity of the task assignment problem considerably, especially when the number of tasks or the number of UAVs is large. Experimental results show that this method is feasible and more efficient than non-hierarchical methods. | Xiaoxuan Hu Huawei Ma Qingsong Ye He Luo | 2015 | Journal of Systems Science & Complexity2015，28，5： | 14 |
| 13 | Application of bioactive hydrogels combined with dental pulp stem cells for the repair of large gap peripheral nerve injuries显示文摘Due to the limitations in autogenous nerve grafting or Schwann cell transplantation,large gap peripheral nerve injuries require a bridging strategy supported by nerve conduit.Cell based therapies provide a novel treatment for peripheral nerve injuries.In this study,we first experimented an optimal scaffold material synthesis protocol,from where we selected the 10%GFD formula(10%GelMA hydrogel,recombinant human basic fibroblast growth factor and dental pulp stem cells(DPSCs))to fill a cellulose/soy protein isolate composite membrane(CSM)tube to construct a third generation of nerve regeneration conduit,CSM-GFD.Then this CSM-GFD conduit was applied to repair a 15-mm long defect of sciatic nerve in a rat model.After 12 week post implant surgery,at histologic level,we found CSM-GFD conduit could regenerate nerve tissue like neuron and Schwann like nerve cells and myelinated nerve fibers.At physical level,CSM-GFD achieved functional recovery assessed by a sciatic functional index study.In both levels,CSM-GFD performed like what gold standard,the nerve autograft,could do.Further,we unveiled that almost all newly formed nerve tissue at defect site was originated from the direct differentiation of exogeneous DPSCs in CSM-GFD.In conclusion,we claimed that this third-generation nerve regeneration conduit,CSM-GFD,could be a promising tissue engineering approach to replace the conventional nerve autograft to treat the large gap defect in peripheral nerve injuries. | Lihua Luo Yan He Ling Jin Yanni Zhang Fernando P.Guastaldi Abdullkhaleg A.Albashari Fengting Hu Xiaoyan Wang Lei Wang Jian Xiao Lingli Li Jianming Wang Akon Higuchi Qingsong Ye | 2021 | Bioactive Materials2021，6，3： | 11 |
| 14 | Hybrids perfluorosulfonic acid ionomer and silicon oxide membrane for application in ion-exchange polymer-metal composite actuators显示文摘This paper reports a new technique to fabricate an ion-exchange polymer-metal composite (IPMC) actuator. This technique is based on a hybrid organic-inorganic composite membrane. In the fabrication course, silica oxide particles, prepared from hydrolysis of tetraethyl orthosilicate in situ with sol-gel reaction, co-crystallize with perfluorosulfonate acid (PFSA) ionomer. Attenuated total reflectance fourier transform infrared spectroscopy (ATR-FTIR) analyses demonstrate that a highly water-saving hybrid membrane is formed. Measurements of mechanical properties reveal that elastic modulus and hardness of the hybrid membrane are about 2 times compared to a commercial PFSA membrane. Scanning electron microscopy (SEM) results show that the hybrid membrane has a high porosity. Inside the membrane pores, there exists a great quantity of micro scale channels in the range of 100―300 nm. After fabrication of IPMC actuator, an electric current sensor, a force sensor, and a high speed camera are assembled and used to evaluate IPMC performance. It is shown that, compared to an IPMC actuator made from a commercial membrane, the electromechanical performance of the new actuator increases 6―8 times; when it is actuated in air, its stable non-water working time is prolonged for 6―7 times. | GUO DongJie DING HaiTao WEI HaiJu HE QingSong YU Min DAI ZhenDong | 2009 | Science China(Technological Sciences)2009，52，10： | 10 |
| 15 | A new dynamics model for traffic flow显示文摘As a study method of traffic flow, dynamics models were developed and applied in the last few decades. However, there exist some flaws in most existing models. In this note, a new dynamics model is proposed by using car-following theory and the usual connection method of micro-macro variables, which can overcome some ubiquitous problems in the existing models. Numerical results show that the new model can very well simulate traffic flow conditions, such as congestion, evacuation of congestion, stop-and-go phenomena and phantom jam. | Rui Jiang Qingsong Wu Zuojin Zhu | 2001 | Chinese Science Bulletin2001，46，4： | 10 |
| 16 | Flame spread over the surface of thermal insulation materials in different environments显示文摘Experiments were conducted in a plateau area in Lhasa and a plain area in Hefei China to investigate the flame spread characteristics on thermal insulation materials under different environmental conditions (pressure and oxygen concentration).Molded polystyrene foam (EPS) and extruded polystyrene foam (XPS) samples were placed horizontally on a small-scale flame spread experimental bench.Changes in the average length of the pool fire,flame spread speed,average flame height,and length of preheating zone were used to determine the effect of the plateau and plain environments on flame spread characteristics.These parameters were all larger in Hefei than in Lhasa,which indicates the fire hazard in Hefei will be higher than that in Lhasa if insulation materials of the same size are used. | HUANG XinJie SUN JinHua JI Jie ZHANG Ying WANG QingSong ZHANG Yi | 2011 | Chinese Science Bulletin2011，56，15： | 10 |
| 17 | Deacetylation of TFEB promotes fibrillar Aβ degradation by upregulating lysosomal biogenesis in microglia显示文摘Microglia 玩在由降级的 A 的清理的一个枢轴的角色他们在 lysosomes,在 Alzheimers 疾病(广告) 阻止淀粉的匾致病。最近的证据建议那个 lysosomal 机能障碍导致有毒的蛋白质总数的不够的消除。我们测试了是否与抄写因素 EB (TFEB ) 提高 lysosomal 功能,必要管理者 modulating lysosomal 小径,将在 microglia 支持一个清理。这里,我们证明 TFEB 的那 microglial 表情便于降级和还原剂扔了的纤丝状的 A (fA ) 淀粉的匾,它被 TFEB 的 deacetylation 进一步提高。用集体 spectrometry 分析,我们第一证实了是的 acetylation 一以前 TFEB 的 unreported 修正并且发现那 SIRT1 直接交往了与并且在离氨酸残余 116 点的 deacetylated TFEB。随后,当 TFEB 被击倒时, SIRT1 overexpression 由 TFEB 下游的目标的 upregulating transcriptional 层次提高了 lysosomal 功能和 fA 降级,它能被禁止。而且,在在 microglia 变异的 K116R 的 deacetylated TFEB 的 overexpression 由刺激 lysosomal 生物的续生说加速了细胞内部的 fA 降级并且极大地在 APP/PS1 转基因的老鼠的大脑片减少了扔的淀粉的匾。我们的调查结果表明 TFEB 的 deacetylation 能调整 lysosomal 生物的续生说和 fA 降级,为 attenuating 使 TFEB 的 microglial 激活成为可能的策略在广告的淀粉的匾免职。 | Jintao Bao Liangjun Zheng Qi Zhang Xinya Li Xuefei Zhang Zeyang Li Xue Bai Zhong Zhang Wei Huo Xuyang Zhao Shujiang Shang Qingsong Wang Chen Zhang Jianguo Ji | 2016 | Protein & Cell2016，7，6： | 10 |
| 18 | Luobusaite:A New Mineral显示文摘A group of mantle minerals including about 70-80 subtypes of minerals are discovered from a podiform chromitite in Tibet,China.Recovered minerals include diamond,coesite,moissanite,wustite,Fe-silides and a new mineral,luobusaite.All of these minerals were hand-picked from heavy-mineral separates of the podiform chromitite in the mantle peridotite of an ophiolite.The grains of luobusaite are as host mineral with inclusions of native silicon or as an intergrowth with native silicon and Fe-Si phase.Luobusaite occurs as irregular grains,with 0.1-0.2 mm in size,consisting of very fine-grained aggregates.The mineral is steel-grey in color,metallic luster,and opaque.The empirical formula(based on 2 for Si)is Fe0.83Si2,according to the chemical compositions of luobusaite.X-ray powder-diffraction data:orthorhombic system,space group Cmca,a = 9.874(14)?,b = 7.784(5)?,c= 7.829(7)?,Z=16. | BAI Wenji SHI Nicheng FANG Qingsong LI Guowu XIONG Ming YANG Jingsui RONG He | 2006 | Acta Geologica Sinica(English Edition)2006，80，5： | 10 |
| 19 | Experimental Study and Model Analysis of the Performance of IPMC Membranes with Various Thickness显示文摘 | Qingsong He Min Yu Linlin Song Haitao Ding Xiaoqing Zhang Zhendong Dai | 2011 | Journal of Bionic Engineering2011，8，1： | 10 |
| 20 | The efficiency and toxicity of dodecafluoro-2-methylpentan-3-one in suppressing lithium-ion battery fire显示文摘Currently,the effective and clean suppression of lithium-ion battery(LIB)fires remains a challenge.The present work investigates the use of various inhibitor doses(Xin)of dodecafluoro-2-methylpentan-3-one(C_(6) F_(12)O)in 300 Ah LIBs,and systematically examines the thermal and toxic hazards of the extinguished batteries via real scale combustion and gas analysis.The inhibitor is shown to be completely effective.The inhibition mechanism involves a combination of chemical inhibition and physical cooling.While the chemical inhibition effect tends to saturate with increasing Xin,the physical cooling remains effective at higher inhibitor doses.However,extinguishing the battery fire with a high Xin of C_(6)F_(12)O is found to incur serious toxicity problems.These results are expected to provide a guideline for the design of inhibitor doses for the suppression of LIB fires. | Yujun Liu Kai Yang Mingjie Zhang Shi Li Fei Gao Qiangling Duan Jinhua Sun Qingsong Wang | 2022 | Journal of Energy Chemistry2022，31，2： | 10 |
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