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Exchange bias on polycrystalline BiFeO3/CO2Fe(Al0.5Si0.5) heterostructures

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Rare Metals 2017年第1期36卷 32-36页

作者： Shi-Zhe wu Yong wu Shao-Qian Yin xiao-Guang Xu Jun Miao Yong Jiang School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Polycrystalline antiferromagnetic BiFeO(BFO)thin films were grown on Si/Si O/Ti/Pt(111) substrates by pulsed laser deposition and then ferromagnetic films CoFe(AlSi)(CFAS) by magnetron sputtering. After fabrication, the films were vacuum-annealed under a 0.1-T magnetic field at different temperatures from 150 to 500 °*** exchange bias field can be tuned by the annealing temperature for the heterostructures, and the electric domain size can be controlled by the crystal grain size. A large exchange bias of about 5*10T is observed in one of the samples. It can be speculated that the crystal grain sizes are the key element in determining the exchange bias and coercivity of the films annealed at the temperature of higher than Neel temperature(T N) of BFO. Furthermore, it is possible to extend spin theories from single-crystal BFO system to polycrystalline BFO system.

关键词： Exchange bias BiFeO3 Polycrystalline Domain walls

Impacts of Salinity and Nitrogen on the Photosynthetic Rate and Growth of Sunflowers(Helianthus annuus L.)

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Pedosphere 2014年第5期24卷 635-644页

作者： ZENG Wen-zhi XU Chi wu Jing-Wei HUANG Jie-Sheng ZHAO Qiang wu Mou-Song State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University

Understanding the interactions between salinity and fertilizers is of significant importance for enhancing crop yield and fertilizeruse efficiency. In this study a complete block design experiment was performed in the Hetao Irrigation District of Inner Mongolia,China, to evaluate the effects of interactions between soil salinity and nitrogen(N) application rate on sunflower photosynthesis and growth and to determine the optimum N application rate for sunflower growth in the district. Four levels of soil salinity expressed as electrical conductivity(0.33–0.60, 0.60–1.22, 1.2–2.44, and 2.44–3.95 dS m-1) and three application rates of N fertilization(90, 135,and 180 kg ha-1) were applied to 36 micro-plots. Soil salinity inhibited the photosynthetic rate, stomatal conductance, transpiration rate, plant height, leaf area, and aboveground dry matter of sunflowers. The intercellular CO2 concentration first decreased and then increased with increasing soil salinity in the seedling stage, and the instantaneous leaf water-use efficiency fluctuated with soil salinity. The stomatal and non-stomatal limitations of sunflowers alternated in the seedling stage; however, in the bud, blooming,and mature stages, the stomatal limitation was prevalent when the salinity level was lower than 2.44 dS m-1, whereas the nonstomatal limitation was predominant above the salinity level. The application of N fertilizer alleviated the adverse effects of salinity on sunflower photosynthesis and growth to some extent. During some key growth periods, such as the seedling and bud stages, a moderate N application rate(135 kg ha-1) resulted in the maximum photosynthetic rate and yielded the maximum dry matter. We suggest a moderate N application rate(135 kg ha-1) for the Hetao Irrigation District and other sunflower-growing areas with similar ecological conditions.

关键词： non-stomatal limitation N-use efficiency optimum N application rate soil salinization stomatal limitation

基于改进YOLOv7的转炉火焰燃烧状态检测研究

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化工自动化及仪表 2024年第3期51卷 388-395页

作者：段志伟邵女豆全辉徐武东北石油大学物理与电子工程学院鞍钢建设集团有限公司

针对某炼钢厂A号转炉炉膛火焰燃烧状态分析判定问题,提出基于改进YOLOv7深度学习网络架构结合视频火焰状态的判断方法。首先引入无参平均注意力机制(PfAAM),在不添加参数或超参数的情况下捕获通道注意力和空间注意力,并使用轻量化上采... 详细信息

针对某炼钢厂A号转炉炉膛火焰燃烧状态分析判定问题,提出基于改进YOLOv7深度学习网络架构结合视频火焰状态的判断方法。首先引入无参平均注意力机制(PfAAM),在不添加参数或超参数的情况下捕获通道注意力和空间注意力,并使用轻量化上采样算子(CARAFE)、功能的内容感知重组进行上采样,使YOLOv7网络获得更好的鲁棒性和准确性。优化后的网络,MAP_0.5值提升了2.4%,精确率提升了5.5%,帧率达到了51.5帧/秒。结合视频图像Matlab火焰状态分析方法,充分利用图像和特征信息增加了对火焰状态判断的可解释性和鲁棒性,并提高了算法的安全性和可信度。实验结果也表明改进算法能够有效提升对火焰燃烧状态识别的准确率和实时性。

关键词：深度学习燃烧状态火焰区域注意力机制转炉火焰特征信息火焰燃烧视频 Matlab

Directional modulation with distributed receiver selection for secure wireless communications

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Science China(Information Sciences) 2021年第12期64卷 215-225页

作者： Hongyan ZHANG Yue xiao Wanbin TANG Gang wu Hong NIU xiaotian ZHOU National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Science and Technology on Communication Networks Laboratory The 54th Research Institute of China Electronics Technology Group Corporation

In this paper, a novel directional modulation with distributed receiver selection(DM-DRS)scheme is proposed for secure wireless communications. In DM-DRS, a particular subset of receivers is activated and part of the information bits are modulated by the index of the activation pattern, in addition to traditional digital modulation. Especially, the scrambling matrix is introduced for the sake of preventing the eavesdropping. Moreover, the performances of bit error rate(BER) in terms of the union bound for both the legitimate user and eavesdropper are respectively derived in the context of an optimal joint maximum likelihood(ML) detector, and the theoretical BER upper bounds are demonstrated to be tight by the numerical results. In the context of the discrete-input and continuous-output system, the ergodic secrecy rates of the legitimate user and the eavesdropper are obtained, the secrecy rate is also quantified. Furthermore,our numerical results exhibit that DM-DRS can achieve an increased transmission rate compared to its traditional directional modulation with cooperative receivers(DM-CR) and spatial and direction modulation(SDM) counterparts, while guaranteeing an improved BER performance.

关键词： directional modulation distributed receiver selection bit error rate secrecy rate

High spindle and kinetochore-associated complex subunit-3 expression predicts poor prognosis and correlates with adverse immune infiltration in hepatocellular carcinoma

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世界胃肠外科杂志:英文版(电子版) 2023年第8期15卷 1600-1614页

作者： Lin-Lin Zheng Ya-Ru Wang Zhen-Rong Liu zhi-Hao Wang Chang-Cheng Tao Yong-Gang xiao Kai Zhang An-Ke wu Hai-Yang Li Jian-Xiong wu Ting xiao Wei-Qi Rong Department of Hepatobiliary Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China State Key Laboratory of Molecular Oncology Department of Etiology and CarcinogenesisNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Hepatobiliary Hernia Surgery Liaocheng Dongcangfu People's HospitalLiaocheng 252000Shandong ProvinceChina The Second Ward of Hepatobiliary Surgery Qianxinan People's HospitalXingyi 562400Guizhou ProvinceChina Department of Interventional Therapy Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjin's Clinical Research Center for CancerTianjin 300000China

BACKGROUND Spindle and kinetochore-associated complex subunit 3(SKA3)is a malignancyassociated gene that plays a critical role in the regulation of chromosome separation and cell ***,the molecular mechanism through which SKA3 regulates tumor cell proliferation in hepatocellular carcinoma(HCC)has not been fully *** To investigate the molecular mechanisms underlying the role of SKA3 in *** SKA3 expression,clinicopathological,and survival analyses were performed using multiple public database platforms,and the results were verified by Western blot and immunohistochemistry staining using collected clinical *** enrichment analyses were performed to evaluate the biological functions and molecular mechanisms of SKA3 in ***,the Tumor Immune Estimation Resource and single-sample Gene Set Enrichment Analysis(ssGSEA)algorithms were utilized to investigate the abundance of tumor-infiltrating immune cells in *** response to chemotherapeutic drugs was evaluated by the R package“pRRophetic”.RESULTS We found that upregulated SKA3 expression was significantly correlated with poor prognosis in patients with *** Cox regression analysis indicated that SKA3 was an independent risk factor for *** revealed that SKA3 expression may facilitate proliferation and migratory processes by regulating the cell cycle and DNA ***,patients with high SKA3 expression had significantly decreased ratios of CD8+T cells,natural killer cells,and dendritic *** sensitivity analysis showed that the high SKA3 group was more sensitive to sorafenib,sunitinib,paclitaxel,doxorubicin,gemcitabine,and *** High SKA3 expression led to poor prognosis in patients with HCC by enhancing HCC proliferation and repressing immune cell infiltration surrounding ***3 may be used as a biomarker for poor prognosis and as a therapeutic target in HCC.

关键词： Spindle and kinetochore-associated protein 3 Hepatocellular carcinoma Prognosis Immune infiltration cells

Control the growth of Fe3O4 on the surface of saponite and its redox effect on Cr(VI)

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Progress in Natural Science:Materials International 2023年第5期33卷 701-709页

作者： Ritong Huang Limei wu xiao Li Ning Tang xiaolong Wang Lili Gao School of Materials Science and Engineering Shenyang Jianzhu University School of Mechanical Engineering Shenyang Jianzhu University

In this paper, Magnetite/Saponite(Fe3O4/Sap) composites were prepared by hydrothermal synthesis and coprecipitation. The prepared Fe3O4/sap composites had high purity and good crystallinity, and nano-Fe3O4was uniformly dispersed on the surface of saponite. Moreover, the removal efficiency of Fe3O4/Sap composites for Cr(VI) in water was evaluated. This study revealed the existence of abundant oxygen vacancies and hydroxyl groups on the surface of Saponite. During the synthesis of Fe3O4on the surface of Sap, the multi-directional crystallization can be controlled to increase the reaction activity of the system. Besides, the prepared Fe3O4/Sap composites provided more reactive edges compared to Fe3O4in the process of removing Cr(VI). The removal amount of Cr(VI) was found to be 17.95 mg/g. The successful preparation of the Fe3O4/Sap composites and the revelation of the Cr(VI) adsorption mechanism are of great significance for the efficient and green removal of heavy metal pollutants in sewage.

关键词： Fe 3 O 4 Saponite Oxygen vacancy Redox Cr (VI)

磁圆梅针联合康复训练治疗儿童痉挛型脑性瘫痪的疗效观察

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海南医学 2024年第6期35卷 819-822页

作者：林明慧刘东升吴智刚吴定腾海南西部中心医院康复医学科海南儋州571700 海南西部中心医院中医科海南儋州571700

目的观察磁圆梅针联合康复训练治疗儿童痉挛型脑性瘫痪的临床疗效。方法选取2022年10~12月在海南西部中心医院儿童康复科门诊及残联定点治疗的60例脑瘫患儿作为研究对象,采用随机数表法分为观察组和对照组,每组30例。观察组患儿给予磁... 详细信息

目的观察磁圆梅针联合康复训练治疗儿童痉挛型脑性瘫痪的临床疗效。方法选取2022年10~12月在海南西部中心医院儿童康复科门诊及残联定点治疗的60例脑瘫患儿作为研究对象,采用随机数表法分为观察组和对照组,每组30例。观察组患儿给予磁圆梅针联合康复训练治疗,对照组患儿给予常规康复功能训练治疗,两组均干预治疗3个月。采用肌张力Ashworth量表(MAS)及粗大运动功能量表(GMFM-88)评价两组患儿干预前后的临床症状改善情况。结果治疗3个月后,观察组患儿的治疗总改善率为96.67%,明显高于对照组的86.67%,差异有统计学意义(P<0.001);治疗3个月后,两组患儿的MAS评分均低于治疗前,且观察组患儿的MAS评分为1.67(1.00,3.08)分,明显低于对照组的2.34(1.83,4.00)分,差异均有统计学意义(P<0.05);治疗3个月后,两组患儿的GMFM-88评分均高于治疗前,且观察组患儿的GMFM-88评分为69.47(24.09,93.74)分,明显高于对照组的51.79(5.15,88.49)分,差异均有统计学意义(P<0.05)。结论磁圆梅针联合康复训练能有效缓解痉挛型脑瘫患儿肌肉痉挛状态,降低肌张力,从而提升患儿的运动能力。

关键词：痉挛型脑瘫磁圆梅针康复训练肌张力粗大运动功能

Application of Finite Element Analysis for Investigation of Intervertebral Disc Degeneration:from Laboratory to Clinic

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Current Medical Science 2019年第1期39卷 7-15页

作者： Bin-wu HU xiao LV Song-feng CHEN Zeng-wu SHAO Department of Orthopaedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Orthopaedic Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China

Due to the ethical concern and inability to detect inner stress distributions of intervertebral disc(IVD),traditional methods for investigation of intervertebral disc degeneration(IVDD)have significant *** researchers have demonstrated that finite element analysis(FEA)is an effective tool for the research of ***,the specific application of FEA for investigation of IVDD has not been systematically elucidated *** the present review,we summarize the current finite element models(FEM)used for the investigation of IVDD,including the poroelastic non linear FEM,difTusive-reactive theory model and cell-activity coupled mechano-electrochemical theory *** further elaborate the use of FEA for the research of IVDD pathogenesis especially for nutrition and biomechanics associated etiology,and the biological,biomechanical and clinical influences of *** addition,the application of FEA for evaluation and exploration of various treatments for IVDD is also *** conclude that FEA is an excellent technique for research of IVDD,which could be used to explore the etiology,biology and biomechanics of *** the future,FEA may help us to achieve the goal of individualized precision therapy.

关键词： finite element analysis intervertebral disc degeneration biomechanics spine

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当量管计算研究

电站系统工程 2024年第5期40卷 81-82,84页

作者：龙志云肖琦王慧文胡双男哈尔滨锅炉厂有限责任公司

通过管子弯头的应力增强系数相等、管子抗弯刚度相等和管子质量相等来对管道进行当量管计算。使用CAESAR Ⅱ 2014管道分析软件进行模拟计算,来验证当量管组计算的可行性。通过计算,当量管组与真实管组管道应力计算的偏差不到3%,当量管... 详细信息

通过管子弯头的应力增强系数相等、管子抗弯刚度相等和管子质量相等来对管道进行当量管计算。使用CAESAR Ⅱ 2014管道分析软件进行模拟计算,来验证当量管组计算的可行性。通过计算,当量管组与真实管组管道应力计算的偏差不到3%,当量管组完全满足工程应用。

关键词：当量管应力计算数值模拟