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| 1 | Corrosion behavior of Al_(0.4)CoCu_(0.6)NiSi_(0.2)Ti_(0.25) high-entropy alloy coating via 3D printing laser cladding in a sulphur environment显示文摘High-entropy alloys(HEAs) are of great interest in materials science and engineering communities owing to their unique phase structure.HEAs are constructed with five or more principal alloying elements in equimolar or near-equimolar ratios.Therefore,they can derive their performance from multiple principal elements ratherthan a single element.In this work,three-dimensional printing laser cladding was applied to produce an Al_(0.4)CoCu_(0.6)NiSi_(0.2)Ti_(0.25) HEA coating.The experimental results confirmed that the laser cladding could be used to produce a thin coating of 120 μm in thickness.In the high-temperature laser cladding process,some Fe elements diffused from the substrate to the coating,forming a combination of face-centred cubic and body-centred cubic phase structures.The HEA coating metallurgically bonded well with the substrate.Owing to the increased dislocation density and number of grain boundaries,the HEA coating was harder and had a stronger hydrophobicity than X70 steel.The electrochemistry results showed that the HEA coating had better corrosion resistance than X70 steel.Aluminium oxides formed on the surface of the HEA coating had a certain protective effect.However,because of the laser cladding,the HEA coating generated cracks.In future work,the laser cladding technology will be improved and heat treatment will be implemented to prevent formation of cracks. | Hongxia Wan Dongdong Song Xiaolei Shi Yong Cai Tingting Li Changfeng Chen | 2021 | Journal of Materials Science & Technology2021，，1： | 6 |
| 2 | In situ synthesis and phase analysis of low density O'-sialon-based multiphase ceramics显示文摘In situ formed low density O'-sialon-based multiphase ceramics were prepared by liquid-phase sintering method at 1400°C with Si3N4, SiO2 and Al2O3 as raw materials.Crystalline phases were identified by X-ray diffraction(XRD).The quantitative phase analysis was finished by matrix-flushing method and the substitution parameter x value of O'-sialon was estimated.The effects of sintering additives on the phase composition of the material were studied.The results show that, when using Y2O3 alone, Al6Si2O13 phase can be formed in the material, but when using Y2O3 and MgO, MgAl2O4 phase can be preferentially formed and the Al6Si2O13 is not observed.The mechanical properties of the material were measured and the relationships between microstructure and mechanical properties were discussed.The sample with Y2O3 and MgO sintering additives, using fused quartz alone as SiO2 source, displays a combination of high bending strength(163 MPa) and good fracture toughness(3.11 MPa·m1/2).Bending strength and fracture toughness of the samples increase with the increase of the content and aspect ratio of elongated grains and decrease with the increase of the porosity. | XU Xiongwen, LIANG Hui, LI Xiaolei, JI Huiming, LU Huixiang, and WAN Yizao Key Laboratory for Advanced Ceramics and Machining Technology(Ministry of Education), Tianjin University, Tianjin 300072, China | 2010 | Rare Metals2010，29，2： | 3 |
| 3 | Fault Tolerant Design of Large-Scale Digital Beam Forming in SRAM-FPGAs for Software Defined Satellite Platforms显示文摘Large scale digital beamforming(LS-DBFs)are widely used in satellite communications for spectrum reuse and transmission enhancement.SRAM-FPGAs are a popular option for software defined satellite platforms due to their rich computation resources and high flexibility.However,they are sensitive to soft errors,which limit their application in space.This paper discusses the application of coding based fault tolerance schemes for the protection of LS-DBFs on software defined payloads.Since multiple FPGAs are usually needed to support the whole LS-DBFs system,different decomposition schemes are compared in terms of resource efficiency and reliability when the coding based scheme is applied to protect the DBFs on a FPGA.Theoretical analysis and hardware experiments shows that resource efficiency and reliability are a pair of contradictory requirements for decomposition schemes.The protection with vertical decomposition could improve the reliability by 96%with 1.5x redundancy.And the protection with horizontal decomposition could improve the reliability by 85%with 1.2 x redundancy. | Zhen Gao Jinhua Zhu Tong Yan Linghua Guo Xiangping Chen Yinqiao Li Xiaolei Wan | 2020 | China Communications2020，17，7： | 2 |
| 4 | Enhanced thermoelectric properties of hydrothermally synthesized n-type Se&Lu-codoped Bi2Te3显示文摘N-type Se&Lu-codoped Bi2Te3 nanopowders were prepared by hydrothermal method and sintered by spark plasma sintering technology to form dense samples.By further doping Se element into Lu-doped Bi2Te3 samples,the thickness of the nanosheets has the tendency to become thinner.The electrical conductivity of Lu0.1Bi1.9Te3−xSex material is reduced with the increasing Se content due to the reduced carrier concentration,while the Seeback coefficient values are enhanced.The lattice thermal conductivity of the Lu0.1Bi1.9Te3−xSex is greatly reduced due to the introduced point defects and atomic mass fluctuation.Finally,the Lu0.1Bi1.9Te2.7Se0.3 sample obtained a maximum ZT value of 0.85 at 420 K.This study provides a low-cost and simple low-temperature method to mass production of Se&Lu-codoped Bi2Te3 with high thermoelectric performance for practical applications. | Xiaolei Shi Xin Ai Qihao Zhang Xiaofang Lu Shijia Gu Li Su Lianjun Wang Wan Jiang | 2020 | Journal of Advanced Ceramics2020，9，4： | 2 |
| 5 | Opti-mized Fog Detection and Classification Technique Basedon BP Artificial Neural Network and Texture Analysis显示文摘 | JIN Baogang ZHANG Ren WAN Xiaolei | 2009 | University of Science and Technology2009，10，2： | 1 |
| 6 | A dual-signal sensor for the analysis of parathion-methyl using silver nanoparticles modified with graphitic carbon nitride显示文摘A highly sensitive and selective method was developed for both UVevis spectrophotometric and fluorimetric determination of organophosphorus pesticides(OPs). This method used silver nanoparticles(AgNPs) modified with graphitic carbon nitride(g-C_3N_4). The AgNPs reduced the fluorescence intensity of g-C_3N_4. Acetylthiocholine(ATCh) could be catalytically hydrolyzed by acetylcholinesterase(AChE) to form thiocholine, which induces aggregation of the AgNPs. This aggregation led to the recovery of the blue fluorescence of g-C_3N_4, with excitation/emission peaks at 310/460 nm. This fluorescence intensity could be reduced again in the presence of OPs because of the inhibitory effect of OPs on the activity of AChE. The degree of reduction was found to be proportional to the concentration of OPs, and the limit of fluorometric detection was 0.0324 mg/L(S/N=3). In addition, the absorption of the g-C_3N_4/AgNPs at 390 nm decreased because of the aggregation of the AgNPs, but was recovered in presence of OPs because of the inhibition of enzyme activity by OPs. This method was successfully applied to the analysis of parathion-methyl in real samples. | Yuan Li Mengqi Wan Guosheng Yan Ping Qiu Xiaolei Wang | 2021 | Journal of Pharmaceutical Analysis2021，11，2： | 1 |
| 7 | Multihop Localization Algorithm Based on Grid-scanning for Wireless Sensor Networks显示文摘 | Wan Jiangwen Guo Xiaolei Yu Ning | 2011 | Sensors2011，11，4： | 1 |
| 8 | 大型水库消落带中西来稗种子耐淹性沿高程梯度的种内分化显示文摘在水文节律稳定、每年蓄水时间很长且水位涨落落差很大的水库中,生长在水库库岸消落带不同高程区域中的植物每年要面对长时间的不同强度的水淹,这种每年发生持续的水淹胁迫可能会导致水库库岸消落带中生长的植物的种子耐淹能力发生种内分化。西来稗(Echinochloa crusgalli var.zelayensis)是在三峡水库消落带中自然生长的优势一年生植物,在三峡水库消落带植被及消落带生态环境保护中发挥着重要作用。本研究的目的在于探究三峡水库消落带中生长的西来稗种子的耐淹能力是否已发生种内分化,以及此分化的发生是否与较弱的种子扩散能力有关。在本研究中,采集来自三峡水库消落带不同高程区域中生长的西来稗种子,在三峡水库即将蓄水时将所有采集的种子放置于三峡水库消落带中4个不同高程位置接受不同深度不同时长的水库蓄水水淹,同时把所有采集的种子也放置于不会被水库蓄水淹没的非消落带河岸上作为对照处理;测定种子在水中的漂浮持续时间和蓄水期间水库水位上涨速度以量化在水库蓄水水位上涨时种子的扩散能力,水库蓄水结束水退后检测放置于水库消落带和非消落带河岸上的种子的种子完好率、种子萌发能力和成苗率。研究结果发现,在经历三峡水库蓄水水淹后,西来稗种子的完好率和最终成苗率随种子母株在消落带中所处的高程的增加而显著降低,表明在三峡水库成库运行七年后,在三峡水库消落带中生长的西来稗的种子耐淹能力已发生了种内分化。三峡水库蓄水水位上涨时西来稗种子在水中较短的漂浮持续时间和水库蓄水时较慢的水位上升速度限制了西来稗种子的水媒传播和扩散距离,从而有利于西来稗种子的耐淹能力发生种内分化。 | Songping Liu Feng Lin Xiaolei Su Qiaoli Ayi Hangang Niu Shaohua Shi Binna Wan Bo Zeng Xiaoping Zhang | 2021 | Journal of Plant Ecology2021，14，1： | 0 |
| 9 | Key considerations on the development of biodegradable biomaterials for clinical translation of medical devices:With cartilage repair products as an example显示文摘With the interdisciplinary convergence of biology,medicine and materials science,both research and clinical translation of biomaterials are progressing at a rapid pace.However,there is still a huge gap between applied basic research on biomaterials and their translational products-medical devices,where two significantly different perspectives and mindsets often work independently and non-synergistically,which in turn significantly increases financial costs and research effort.Although this gap is well-known and often criticized in the biopharmaceutical industry,it is gradually widening.In this article,we critically examine the developmental pipeline of biodegradable biomaterials and biomaterial-based medical device products.Then based on clinical needs,market analysis,and relevant regulations,some ideas are proposed to integrate the two different mindsets to guide applied basic research and translation of biomaterial-based products,from the material and technical perspectives.Cartilage repair substitutes are discussed here as an example.Hopefully,this will lay a strong foundation for biomaterial research and clinical translation,while reducing the amount of extra research effort and funding required due to the dissonance between innovative basic research and commercialization pipeline. | Li Wang Xiaolei Guo Jiaqing Chen Zhen Zhen Bin Cao Wenqian Wan Yuandong Dou Haobo Pan Feng Xu Zepu Zhang Jianmei Wang Daisong Li Quanyi Guo Qing Jiang Yanan Du Jiakuo Yu Boon Chin Heng Qianqian Han Zigang Ge | 2022 | Bioactive Materials2022，7，3： | 0 |
| 10 | A dynamic regulation of nitrogen on floret primordia development in wheat显示文摘Nitrogen(N)fertilization is critical for spike and floret development,which affects the number of fertile florets per spike(NFFs).However,the physiological regulation of the floret development process by N fertilization is largely unknown.A high temporal-resolution investigation of floret primordia number and morphology,dry matter,and N availability was conducted under three N fertilization levels:0(N0),120(N1)and 240(N2)kg ha^(−1).Interestingly,fertile florets at anthesis stage were determined by those floret primordia with meiotic ability at booting stage:meiotic ability was a threshold that predicted whether a floret primordium became fertile or abortive florets.Because the developmental rate of the 4th floret primordium in the central spikelet was accelerated and then they acquired meiotic ability,the NFFs increased gradually as N application increased,but the increase range decreased under N2.There were no differences in spike N concentration among treatments,but leaf N concentration was increased in the N1 and N2 treatments.Correspondingly,dry matter accumulation and N content of the leaf and spike in the N1 and N2 treatments was increased as compared to N0.Clearly,optimal N fertilization increased leaf N availability and transport of assimilates to spikes,and allowed more floret primordia to acquire meiotic ability and become fertile florets,finally increasing NFFs.There was no difference in leaf N concentration between N1 and N2 treatment,whereas soil N concentration at 0–60 cm soil layers was higher in N2 than in N1 treatment,implying that there was still some N fertilization that remained unused.Therefore,improving the leaf’s ability to further use N fertilizer is vital for greater NFFs. | Zhen Zhang Yujing Li Yuxun Wu Xiaoyu Zheng Xiaolei Guo Wan Sun Zhencai Sun Zhimin Wang Yinghua Zhang | 2024 | The Crop Journal2024，12，1： | 0 |
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