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Rare Metals 2023年第6期42卷 1847-1857页

作者： Ming-Liang Guo Zhi-Yu Wu Miao-Miao Zhang Zi-Jian Huang ke-xi Zhang Bing-Rong Wang Jin-Chun Tu State key Laboratory of Marine Resource Utilization in the South China Sea College of Materials Science and EngineeringHainan UniversityHaikou570228China School of Science Hainan UniversityHaikou570228China

The oxygen evolution reaction(OER) with slow kinetics is the rate-limiting step of electrochemical water splitting.A reasonable construction of interface nanostructures is the key to improving the OER efficiency and durability of non-noble metal *** this study,a FeOOH/NiCo_(2)S_(4) core-shell nanorod array with abundant heterogeneous interfaces and high density of active sites was successfully prepared by a microwave-as sis ted *** research and theoretical calculations show that the abundant strong coupling Ni/Co-S-Fe interface helps in adjusting the electronic structure of the material surface,optimizing the adsorption energy of the intermediate,and realizing an efficient catalytic *** as-synthesized FeOOH/NiCo_(2)S_(4)/NF composite electrode exhibited lower overpotential(198 mV) and Tafel slope(62 mV·dec^(-1)) at a current density of 10 mA·cm^(-2)and excellent stability(approximately 100% retention after100 h) than the NiCo_(2)S_(4)/nickel foam(NF).In conclusion,constructing heterojunctions with complementary active materials is an effective strategy to design efficient and robust OER electrocatalysts.

关键词： Transition metal sulfides FeOOH Interface structure Adsorption energy Oxygen evolution

Mesoporous Ag nanocubes synthesized via selectively oxidative etching at room temperature for surface- enhanced Raman spectroscopy

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Nano Research 2015年第7期8卷 2351-2362页

作者： Lin Gan Meijia Yang xi ke Guofeng Cui Xudong Chen Shiva Gupta William kellogg Drew Higgins Gang Wu key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education of China Sun Yat-sen University Guangzhou 510275 China Electronic Packaging Electrochemistry Laboratory School of Chemistry and Chemical Engineering Sun Yat-sen University Guangzhou 510275 China Department of Chemical and Biological Engineering University at Buffalo The State University of New York Buffalo New York 14260 USA Department of Chemical Engineering University of Waterloo Waterloo Ontario N2L 36 I Canada

Silver nanocubes enriched with {100} facets have been extensively used for surface-enhanced Raman scattering. Herein, we report a new water-phase synthesis method for weU-defined Ag nanocubes with tunable sizes via a two-step procedure at room temperature. First, irregularly shaped Ag nanoparticles （INPs） were prepared by reducing silver ammonia solution using ethylal. Second, the agglomerated INPs were selectively etched with HNO3 and C1- to yield {100} facet-rich mesoporous Ag nanocubes. The mechanism of Ag-nanocube formation and growth was investigated in detail by elucidating the involved chemical reactions and physical changes at each step during the synthesis. The addition of C1- anions was responsible for facilitating Ag nanoparticle growth by removing surface-adsorbed Ag＋ species, thereby eliminating inter-particle repulsive forces. This agglomeration was found crucial for the subsequent selective oxidation of Ag nanoparticles because the protective agent used, polyvinylpyrrolidone （PVP）, was the most effective one for adsorption on the surfaces of Ag nanoparticles of size greater than approximately 50 nm. Importantly mesopores were found inside the Ag nanocubes; this can be attributed to the unavoidable imperfect packing during the agglomeration of INPs. The newly prepared Ag nanocubes were further used to enhance the Raman signal of rhodamine 6G, which is capable of reducing the detection limitation to 10-16 mol·L-1.

关键词： Ag nanocube,selective etching water phase synthesis room tempersture surface-enhanced raman scattering(sers)

Blind equalization and automatic modulation classification based on subspace for subcarrier MPSK optical communications

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Optoelectronics Letters 2017年第4期13卷 304-308页

作者： CHEN Dan GUO Lin-yuan WANG Chen-hao ke xi-zheng School of Automation ＆ Information Xi ＇an University of Technology Xi＇an 710048 China xi ＇an Polytechnic University Xi ＇an 710048 China

Equalization can compensate channel distortion caused by channel multipath effects, and effectively improve convergent of modulation constellation diagram in optical wireless system. In this paper, the subspace blind equalization algorithm is used to preprocess M-ary phase shift keying(MPSK) subcarrier modulation signal in receiver. Mountain clustering is adopted to get the clustering centers of MPSK modulation constellation diagram, and the modulation order is automatically identified through the k-nearest neighbor(KNN) classifier. The experiment has been done under four different weather conditions. Experimental results show that the convergent of constellation diagram is improved effectively after using the subspace blind equalization algorithm, which means that the accuracy of modulation recognition is increased. The correct recognition rate of 16 PSK can be up to 85% in any kind of weather condition which is mentioned in paper. Meanwhile, the correct recognition rate is the highest in cloudy and the lowest in heavy rain condition.

关键词： Blind equalization Meteorology Nearest neighbor search Optical communication Optical signal processing Optical systems Phase shift keying Signal receivers

GGE biplot analysis of yield stability and test location representativeness in proso millet (Panicum miliaceum L.) genotypes

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Journal of Integrative Agriculture 2016年第6期15卷 1218-1227页

作者： ZHANG Pan-pan SONG Hui ke xi-wang JIN xi-jun YIN Li-hua LIU Yang QU Yang SU Wang FENG Nai-jie ZHENG Dian-feng FENG Bai-li National Coarse Cereals Engineering Research Center Heilongjiang August First Agricultural UniversityDaqing 163319P.R.China State key Laboratory of Crop Stress Biology in Arid Areas Ministry of Science and TechnologyNorthwest A&F UniversityYangling 712100P.R.China Anyang Academy of Agriculture Sciences Anyang 455000P.R.China Baoji Institute of Agricultural Science Qishan 722400P.R.China

The experiments were conducted for three consecutive years across 14 locations using 9 non-waxy proso millet genotypes and 16 locations using 7 waxy proso millet genotypes in China. The objectives of this study were to analyze yield stability and adaptability of proso millets and to evaluate the discrimination and representativeness of locations by analysis of vari- ance （ANOVA） and genotype and genotype by environment interaction （GGE） biplot methods. Grain yields of proso millet genotypes were significantly influenced by environment （E）, genotype （G） and their interaction （GxE）（P〈0.1%）. GxE inter- action effect was six times higher than G effect in non-waxy group and seven times in waxy group. N04-339 in non-waxy and Neimi 6 （NM6） in waxy showed higher grain yields and stability compared with other genotypes. Also, Neimi 9 （NM9, a non-waxy cultivar） and 90322-2-33 （a waxy cultivar） showed higher adaptability in 7 and in 11 locations, respectively. For non-waxy, Dalat, Inner Mongolia （E2） and Wuzhai, Shanxi （E5） were the best sites among all the locations for maximizing the variance among candidate cultivars, and Yanchi, Ningxia （El0） had the best representativeness. Wuzhai, Shanxi （e9） and Yanchi, Ningxia （e14） were the best representative locations, and Baicheng, Jilin （e2） was better discriminating location than others for waxy genotypes. Based on our results, El0 and e14 have enhanced efficiency and accuracy for non-waxy genotypes and waxy genotypes selection, respectively in national regional test of proso millet varieties.

关键词： proso millet GGE biplot yield stability test location representativeness

The coupling of dynamics and permeability in the hydrocarbon accumulation period controls the oil-bearing potential of low permeability reservoirs:a case study of the low permeability turbidite reservoirs in the middle part of the third member of Shahejie

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Petroleum Science 2016年第2期13卷 204-224页

作者： Tian Yang Ying-Chang Cao Yan-Zhong Wang Henrik Friis Beyene Girma Haile ke-Lai xi Hui-Na Zhang School of Geosciences China University of PetroleumQingdao 266580 Shandong China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071 China Department of Geoscience Aarhus University Hoegh-Guldbergs Gade 2 8000 Aarhus C Denmark Department of Geosciences University of OsloP.O. Box 1047 Blindern 0316 Oslo Norway

The relationships between permeability and dynamics in hydrocarbon accumulation determine oil- bearing potential （the potential oil charge） of low perme- ability reservoirs. The evolution of porosity and permeability of low permeability turbidite reservoirs of the middle part of the third member of the Shahejie Formation in the Dongying Sag has been investigated by detailed core descriptions, thin section analyses, fluid inclusion analyses, carbon and oxygen isotope analyses, mercury injection, porosity and permeability testing, and basin modeling. The cutoff values for the permeability of the reservoirs in the accumulation period were calculated after detailing the accumulation dynamics and reservoir pore structures, then the distribution pattern of the oil-bearing potential of reservoirs controlled by the matching relationship between dynamics and permeability during the accumulation period were summarized. On the basis of the observed diagenetic features and with regard to the paragenetic sequences, the reservoirs can be subdivided into four types of diagenetic facies. The reservoirs experienced two periods of hydro- carbon accumulation. In the early accumulation period, the reservoirs except for diagenetic facies A had middle to high permeability ranging from 10 × 10-3 gm2 to 4207 × 10-3 lain2. In the later accumulation period, the reservoirs except for diagenetic facies C had low permeability ranging from 0.015 × 10-3 gm2 to 62× 10-3 -3m2. In the early accumulation period, the fluid pressure increased by the hydrocarbon generation was 1.4-11.3 MPa with an average value of 5.1 MPa, and a surplus pressure of 1.8-12.6 MPa with an average value of 6.3 MPa. In the later accumulation period, the fluid pressure increased by the hydrocarbon generation process was 0.7-12.7 MPa with an average value of 5.36 MPa and a surplus pressure of 1.3-16.2 MPa with an average value of 6.5 MPa. Even though different types of reservoirs exist, all can form hydrocarbon accumulations i

关键词： Reservoir porosity and permeabilityevolution Accumulation dynamics Cutoff-values ofpermeability in the accumulation period Oil-bearingpotential Low permeability reservoir The third memberof the Shahejie Formation Dongying Sag

Synthesis and Spectral Characteristics for Zinc Tetraphenylporphyrin Modified Zinc Oxide Nanowires

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光谱学与光谱分析 2016年第S1期36卷 427-428页

作者： HUANG Hui-han ke Jian-xi xiE Wen-qiang PAN Hai-bo College of Chemistry Fuzhou UniversityFuzhou 350116 China

A nest-like architectures(ZnO NAs)were prepared onto the conductive glass(ITO)by hydrothermal method.A metal-free porphyrin,tetraphenylporphyrin(H2TPP),was synthesized via Adler *** ions with Zn-unsaturated coordination bonds on the surface of ZnO NAs were used as a template,and also H2TPP was used as"molecular fragments".Zinc tetraphenylporphyrin(ZnTPP)molecules were obtained on the surface of ZnO NAs by in-situ *** NAs direct provides of zinc source makes ZnTPP stably coated on the surface of ZnO NAs nanosheet,formed a tight composite materials(ZnTPP/ZnO NAs).Due toZnTPP with four phenyls in meso position,the surface of ZnTPP/ZnO NAs was with hydrophobic *** the photocatalytic experiment,the degradation selectivity for phenol(hydrophobicity)in the mixture of phenol and rhodamine B(hydrophily)was increased under visible irradiation.

关键词： ZnO In-situ Zinc tetraphenylporphyrin UV-Vis spectrum Selective photocatalysis

Estimating the Delay-time for the Stability of Markovian Jump Bilinear Systems with Saturating Actuators

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自动化学报 2010年第5期36卷 762-766页

作者： KANG Yu SHANG Wei-ke xi Hong-Sheng Department of Automation University of Science and Technology of China Hefei 230026 P.R. China

This paper is concerned with the stochastic stabilizability problem of time-delay Markovian jump bilinear systems with saturating *** conditions for local exponential stochastic stability of the delay-free systems with memoryless state feedback control are given, and an upperbound of time delay is provided such that the delayed system retains its stochastic stabilizability if the corresponding delay-free system is stochastic stabilizable. A numerical example is provided to demonstrate the effectiveness of the proposed approach

关键词：马尔可夫链线性系统可靠性稳定性

导航下经皮顺行前柱螺钉联合后路接骨板内固定治疗髋臼横行伴后壁骨折的疗效观察

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创伤外科杂志 2024年第5期26卷 370-376页

作者：方志勋钱胜龙汪国栋裴璇柯烯刘曦明中部战区总医院骨科武汉430070 南方医科大学第一临床医学院广州510515

目的比较导航下经皮顺行前柱螺钉联合后路重建钢板与单纯后路重建钢板内固定治疗髋臼横行伴后壁骨折的临床疗效。方法采用回顾性队列研究分析2012年1月—2022年1月中部战区总医院骨科收治的36例髋臼横行伴后壁骨折患者的临床资料,男性22... 详细信息

目的比较导航下经皮顺行前柱螺钉联合后路重建钢板与单纯后路重建钢板内固定治疗髋臼横行伴后壁骨折的临床疗效。方法采用回顾性队列研究分析2012年1月—2022年1月中部战区总医院骨科收治的36例髋臼横行伴后壁骨折患者的临床资料,男性22例,女性14例;年龄25~69岁,平均44.9岁;道路交通伤25例,高处坠落伤8例,挤压伤3例。按照手术方式不同分为联合固定组(19例)和单纯后路组(17例),联合固定组使用导航下经皮前柱螺钉联合后路重建钢板内固定治疗,单纯后路组使用单纯后路重建钢板内固定治疗。比较两组手术时间、术中出血量、骨折愈合时间及完全负重时间。术后2 d采用Matta影像学评估标准评价骨折复位质量。术后3、6个月及末次随访时采用改良Merle d’Aubigné-Postel评分标准评估患侧髋关节功能。观察术后并发症发生情况。结果两组均获随访12~44个月,平均22.1个月。联合固定组手术时间(136.4±8.7)min显著长于单纯后路组(96.2±13.5)min,骨折愈合时间(12.7±2.5)周显著短于单纯后路组(14.9±2.4)周,完全负重时间(17.4±2.8)周显著短于单纯后路组(20.0±3.9)周,差异均有统计学意义(P0.05)。术后2 d根据Matta影像评分,联合固定组解剖复位16例,不完全复位3例,解剖复位率为84.2%;单纯后路组解剖复位13例,不完全复位3例,不满意复位1例,解剖复位率为76.5%,两组患者Matta影像学评价比较差异无统计学意义(P>0.05)。术后3、6个月改良Merle d’Aubigné-Postel评分显示联合固定组患侧髋关节功能显著优于单纯后路组(P均0.05)。联合固定组术后并发症发生率为21.1%(4/19),单纯后路组为23.5%(4/17),差异无统计学意义(P=0.858)。结论使用后路重建钢板联合经皮顺行前柱螺钉治疗髋臼横行伴后壁骨折能使患者骨折愈合更快,功能康复更佳。导航技术能有利于前柱螺钉的精确置入,值得推广。

关键词：髋臼骨折骨折固定术钢板导航系统

非平衡辐射响应与准二维高温超导体系的磁通涡旋激发

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物理学报 2000年第5期49卷 989-906页

作者：徐克西上海大学物理系上海201800

从实验上揭示了高温超导体YBa2 Cu3 O7-δ(YBCO)颗粒膜具有准二维结构的输运特征以及超导弱连接行为特征 .在此基础上 ,将超导颗粒膜样品等效为准二维Josephson弱连接阵列系统 ,讨论了电流引起的二维超导体系中磁通“涡旋反涡旋”束... 详细信息

从实验上揭示了高温超导体YBa2 Cu3 O7-δ(YBCO)颗粒膜具有准二维结构的输运特征以及超导弱连接行为特征 .在此基础上 ,将超导颗粒膜样品等效为准二维Josephson弱连接阵列系统 ,讨论了电流引起的二维超导体系中磁通“涡旋反涡旋”束缚对的拆对激发问题 ,并给出了自由涡旋分布n(T ,I)的分析表达式 .将颗粒膜样品的非平衡辐射响应测量结果与电流激发自由涡旋分布n(T ,I)相比较 ,两者具有相似的分布特征 .该结果表明 ,高温超导体颗粒膜非平衡辐射响应机制与磁通“涡旋反涡旋”

关键词：非平衡辐射响应准二维高温超导体系磁通涡激发

大气湍流中部分相干光束上行和下行传输偏振特性的比较

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物理学报 2015年第22期64卷 144-151页

作者：柯熙政王姣西安理工大学自动化与信息工程学院西安710048

以部分相干的电磁高斯-谢尔模型(electromagnetic Gaussian-Schell model,EGSM)光束为研究对象,根据相干和偏振的统一理论以及随机光束的Stokes参量,推导出EGSM光束在大气湍流中斜程传输时的偏振度(degree of polarization,Do P)和偏振... 详细信息

以部分相干的电磁高斯-谢尔模型(electromagnetic Gaussian-Schell model,EGSM)光束为研究对象,根据相干和偏振的统一理论以及随机光束的Stokes参量,推导出EGSM光束在大气湍流中斜程传输时的偏振度(degree of polarization,Do P)和偏振方向角的表达式,研究了大气湍流中上行和下行传输时EGSM光束偏振特性的不同.研究结果表明:在相同条件下,EGSM光束下行传输时整个光场Do P的分布比上行传输要集中;下行传输时轴上点的Do P达到最大值所对应的传输距离长于上行传输.可以看出,EGSM光束沿下行路径传输时,探测器可以接收更远距离处的波束传输信息.

关键词：大气湍流偏振度偏振方向角上行和下行传输