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Optimization of water and nitrogen management for surge-root irrigated apple trees in the Loess Plateau of China

Journal of Integrative Agriculture 2021年第1期20卷 260-273页

作者： DAI Zhi-guang FEI Liang-jun ZENG Jian HUANG De-liang liu Teng nstitute of Water Resources Research Xi’an University of TechnologyXi’an 710048P.R.China School of Hydraulic and Ecological Engineering Nanchang Institute of TechnologyNanchang 330099P.R.China

The Loess Plateau is one of the main regions for growing apple trees in China, but a shortage of water resources and low utilization of nitrogen have restricted its agricultural development. A 2-year field experiment was conducted which included three levels of soil water content(SWC), 90–75%, 75–60%, and 60–45% of field capacity, and five levels of nitrogen application(N(app)), 0.7, 0.6, 0.5, 0.4 and 0.3 kg/plant. The treatments were arranged in a strip-plot design with complete randomized blocks with three replications. For both years, the water and N(app) had significant(P<0.05) effects on leaf area index(LAI), yield, water use efficiency(WUE) and nitrogen partial factor productivity(NPFP) while the interaction effect of water and N(app) on yield, WUE and NPFP was significant(P<0.05) in 2018, and not in 2017. For the same SWC level, WUE first increased, then decreased as N(app) increased, while NPFP tended to decrease, but the trend of LAI with different N(app) was closely related to SWC. At the same N(app), the LAI increased as SWC increased, while the WUE and NPFP first increased, then decreased, but the yield showed different trends as the SWC increased. The dualistic and quadric regression equations of water and N(app) indicate that the yield, WUE and NPFP cannot reach the maximum at the same time. Considering the coupling effects of water and N(app) on yield, WUE and NPFP in 2017 and 2018, the SWC level shall be controlled in 75–60% of field capacity and the N(app) is 0.45 kg/plant, which can be as the suitable strategy of water and N(app) management for the maximum comprehensive benefits of yield, WUE and NPFP for apple trees in the Loess Plateau and other regions with similar environments.

关键词： surge-root irrigation yield water use efficiency nitrogen partial factor productivity

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Estimation of fracture density and orientation from azimuthal elastic impedance difference through singular value decomposition

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Petroleum Science 2021年第6期18卷 1675-1688页

作者： Lin Li guang-Zhi Zhang jun-Zhou liu Lei Han Jia-Jia Zhang School of Geosciences China University of Petroleum(East China)QingdaoShandong 266580China Sinopec Exploration and Production Research Institute Beijing100083China

Accurate estimation of fracture density and orientation is of great significance for seismic characterization of fractured ***,we propose a novel methodology to estimate fracture density and orientation from azimuthal elastic impedance(AEI)difference using singular value decomposition(SVD).Based on Hudson's model,we first derive the AEI equation containing fracture density in HTI media,and then obtain basis functions and singular values from the normalized AEI difference utilizing *** shows that the basis function changing with azimuth is related to fracture orientation,fracture density is the linearly weighted sum of singular values,and the first singular value contributes the most to fracture ***,we develop an SVD-based fracture density and orientation inversion approach constrained by smooth prior elastic *** example shows that fracture density and orientation can be stably estimated,and the correlation coefficient between the true value and the estimated fracture density is above 0.85 even when an S/N ratio of *** data example shows that the estimated fracture orientation is consistent with the interpretation of image log data,and the estimated fracture density reliably indicates fractured gas-bearing reservoir,which could help to guide the exploration and development of fractured reservoirs.

关键词： Singular value decomposition HTI media Azimuthal elastic impedance inversion Fracture density Fracture orientation

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FedFV: A Personalized Federated Learning Framework for Finger Vein Authentication

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Machine Intelligence Research 2023年第5期20卷 683-696页

作者： Feng-Zhao Lian jun-Duan Huang Ji-Xin liu guang Chen jun-Hong Zhao Wen-Xiong Kang School of Automation Science and Engineering South China University of TechnologyGuangzhou 510641China GRG Banking Equipment Co.Ltd. Guangzhou 510663China School of Automation Guangdong University of Petrochemical TechnologyMaoming 525000China

Most finger vein authentication systems suffer from the problem of small sample ***,the data augmentation can alleviate this problem to a certain extent but did not fundamentally solve the problem of category *** the researchers resort to pre-training or multi-source data joint training methods,but these methods will lead to the problem of user privacy *** view of the above issues,this paper proposes a federated learning-based finger vein authentication framework(FedFV)to solve the problem of small sample size and category diversity while protecting user *** training under FedFV,each client can share the knowledge learned from its user′s finger vein data with the federated client without causing template *** addition,we further propose an efficient personalized federated aggregation algorithm,named federated weighted proportion reduction(FedWPR),to tackle the problem of non-independent identically distribution caused by client diversity,thus achieving the best performance for each *** thoroughly evaluate the effectiveness of FedFV,comprehensive experiments are conducted on nine publicly available finger vein *** results show that FedFV can improve the performance of the finger vein authentication system without directly using other client *** the best of our knowledge,FedFV is the first personalized federated finger vein authentication framework,which has some reference value for subsequent biometric privacy protection research.

关键词： Finger vein personalized federated learning privacy protection biometric authentication.

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面向APT攻击的溯源和推理研究综述

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软件学报 2025年第1期36卷 203-252页

作者：杨秀璋彭国军刘思德田杨李晨光傅建明武汉大学国家网络安全学院空天信息安全与可信计算教育部重点实验室(武汉大学国家网络安全学院) 贵州大学贵州省大数据产业发展应用研究院

高级可持续性威胁(advanced persistent threat, APT)是一种新型网络攻击,具有极强的组织性、隐蔽性、持续性、对抗性和破坏性,给全球网络安全带来严重危害.传统APT攻击防御倾向于构建模型检测攻击的恶意性或识别家族类别,以被动防御为... 详细信息

高级可持续性威胁(advanced persistent threat, APT)是一种新型网络攻击,具有极强的组织性、隐蔽性、持续性、对抗性和破坏性,给全球网络安全带来严重危害.传统APT攻击防御倾向于构建模型检测攻击的恶意性或识别家族类别,以被动防御为主,缺乏全面及深入地梳理APT攻击溯源和推理领域的工作.基于此,围绕APT攻击的溯源和推理的智能化方法开展综述性研究.首先,提出APT攻击防御链,有效地将APT攻击检测、溯源和推理进行区分和关联;其次,详细比较APT攻击检测4个任务的相关工作;然后,系统总结面向区域、组织、攻击者、地址和攻击模型的APT攻击溯源工作;再次,将APT攻击推理划分为攻击意图推理、攻击路径感知、攻击场景还原、攻击阻断和反制这4个方面,对相关研究进行详细总结和对比;最后,讨论APT攻击防御领域的热点主题、发展趋势和挑战.

关键词：高级可持续威胁网络安全攻击溯源攻击推理人工智能

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Predictive methods for density and refractive index of naphthenic lubricating oils during solvent extraction process

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Petroleum Science 2023年第3期20卷 1934-1946页

作者： Xiao-Ling Xu Tian-Qi Wang guang-Huai Chen jun-Wei Hou Yan-Sheng liu State Key Laboratory of Heavy Oil Processing China University of Petroleum(Bejing)at KaramayKaramayXinjiang834000China State Key Laboratory of Heavy oil Processing China University of Petroleum(Bejing)Bejing102200China

Lubricating oils are usually produced by solvent extraction to separate aromatics in order to achieve the desired specifications and better quality *** the different properties of lubricating oils,density and refractive index are some of the most important properties which can both be used for petroleum fluid *** of density and refractive index for naphthenic oils during solvent extraction by DMSO obtained by the pseudo-component approach and the quadratic correlation were both *** pseudo-component approach is a method to predict density and refractive index from composition while the latter merely relates density to refractive *** indicated that the predictions yielded by the pseudo-component method were in good agreement with experimental data for naphthenic *** the use of a function of refractive index(FRI_(20))as a pseudo-component property remarkably improved n_(20)predictions for the naphthenic ***,the density and refractive index predictions obtained by the quadratic correlation exhibited significantly higher de-viations for naphthenic oils than those for paraffinic *** a new modified correlation of the same functional form was proposed for naphthenic *** modification significantly improved predictions for naphthenic oils,which presented similar accuracy as the pseudo-component *** the previous correlation was still used for paraffinic ***,effect of temperature on density and refractive index of naphthenic oils was *** showed that the modified quadratic correlation was accurate for describing the relationship between density and refractive index of naphthenic oils at 20-90℃.The temperature dependence of density and refractive index for the raffinates and the extracts could be accurately described by the thermal coefficients for saturates and aromatics,*** the refractive index variation of the extracts with temperature,the

关键词： Density Refractive index Pseudo-components Paraffinic lubricating oils Naphthenic lubricating oils Solvent extraction

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Improving WC-Co coating adhesive strength on rough substrate:Finite element modeling and experiment

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Journal of Materials Science & Technology 2020年第2期37卷 1-8页

作者： Adnan Tahir guang-Rong Li Mei-jun liu Guan-jun Yang Cheng-Xin Li Yu-Yue Wang Chang-Jiu Li State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an710049China

The adhesive strength in a coating-substrate system is of primary importance for the coating lifetime in ***,the underlying mechanism is not fully understood due to the complex internal structure of composite *** this study,the effect of substrate roughness on the adhesive strength of WCCo coatings was investigated by experiment and *** show that the adhesive strength is significantly affected by the *** the case of the Ra<2μm,the adhesive strength is approximately 35–46 *** the Ra is 4μm,the adhesive strength increases to nearly 60 MPa.A finite element model was developed to correlate the roughness with adhesive *** is found that the predicted values are well consistent with the experimental *** addition,with the increase of the roughness,the residual stress would be changed from concentrated state to widespread state,which decreases the critical stress to result in crack ***’s why a larger roughness can cause a higher adhesive *** study gives understanding on the mechanism of adhesive strength affected by roughness,which contributes to the parameter optimization with better performance.

关键词： Adhesive strength Roughness Lifetime Simulation XFEM Residual stress

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Photorefractive Spatial Dark-Soliton Stripes in LiNbO_(3):Fe Crystal and Their Application

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Chinese Physics Letters 1996年第2期13卷 101-104页

作者： ZHANG Guo-quan liu Si-min XU Jing-jun ZHANG guang-yin SUN Qian Department of Physics Nankai UniversityTianjin 300071

We observed the photorefractive spatial dark-soliton stripes In LiNbO3:Fe crystal,and demonsirate the planar waveguide property of refractive index proiile induced by these spatial dark-soli ton *** suggest a new moth... 详细信息

关键词： technique waveguide Photorefractive

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A New Method to Suppress the Fanning Noise in the Photorefractive LiNbO_(3):Fe Crystals

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Chinese Physics Letters 1996年第9期13卷 675-677页

作者： SUN Qian TIAN Guo-yun liu Si-min XU Jing-jun ZHANG guang-yin Department of Physics Nankai UniversityTianjin 300071

A new method to suppress the fanning noise caused by He-Ne laser in the cooperation with Ar+laser in photorefractive LiNbO_(3):Fe crystal was successfully *** method is simple and *** using this method,fanning-noise-f... 详细信息

关键词： Photorefractive Crystal laser

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Sliding Mode Control to Stabilization of an ODE-Schrdinger Cascade Systems Subject to Boundary Control Matched Disturbance

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Journal of Systems Science & Complexity 2018年第5期31卷 1146-1163页

作者： liu jun-jun The College of Mathematics Taiyuan University of Technology

This paper is concerned with the boundary feedback stabilization of a coupled ODE- Schrodinger system cascades with the external disturbance flowing the control end. The author uses the sliding mode control （SMC） to deal with the disturbance. By the SMC approach, the disturbance is supposed to be bounded only. The existence and uniqueness of the solution for the closed-loop via SMC are proved, and the monotonicity of the ＂reaching condition＂ is presented without the differentiation of the sliding mode function, for which it may not always exist for the weak solution of the dosed-loop system. Some numerical simulations is presented to illustrate the effectiveness of the proposed control.

关键词： Boundary control cascade systems disturbance rejection sliding mode control

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Clinical observation of white eye distribution in patients with hyperlipidemia: an artificial intelligence digital visual examination technique

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Journal of Traditional Chinese Medicine 2025年

作者： SONG Tianli LI Haixia liu Li'an Department of Cardiology， the guang'anmen Hospital， China Academy of Chinese Medical Sciences National College， Beijing University of Chinese Medicine

Objective: To explore the clinical observation of white eye distribution characteristics of hyperlipidemic patients based on artificial intelligence digital eye diagnosis technology. Methods: One hundred and fifty subjects were examined in the outpatient and inpatient departments of guang'anmen Hospital of the China Academy of Traditional Chinese Medicine from 01 February 2022 to 01 February 2023， including 80 cases in the hyperlipidemic patient (HLP) group and 70 cases in the normal lipid level patient (NC) group. The two groups were collected and extracted by the artificial intelligence visual diagnostic instrument and analyzed by the MyEyeD-10 white eye shadowless imaging health intelligence analysis system. Finally， SPSS 26.0 (Version X; IBM Corp.， Armonk， NY， USA) was used for statistical processing. Results: Significant differences were noted in the scores of "spot" and "foggy" features between the two groups. Between groups， the "spot" feature score of the white eye morphology in the HLP group (11.07 ± 3.22) was higher than that in the NC group (7.50 ± 4.11) (P < 0.01). Moreover， the "foggy" feature score of the eye morphology in the HLP group (8.37 ± 2.25) was higher than that in the NC group (P < 0.01)， higher than that of the NC group (5.72 ± 1.21) (P < 0.05). There were significant differences in the "A" (stomach)， "B"， "O" (spleen)， and "M" (liver) eye-contact region scores between the two groups， and the "B"， "O" (spleen) and "M" (liver) eye-contact region scores were significantly different. The scores of the white eye channel region in the HLP group were significantly higher than those in the control group， with the "A"， "B"， and "O" regions (P < 0.01)， "M" region (P < 0.01)， "A"， "B"， "O"， and "M" region (P < 0.01). "M" zone (P < 0.05). The scores of "dull red" and "yellow" features were significantly different， and the scores of "dull red" and "yellow" colors of the white eye choroid in the HLP group were significantly higher than those in the HLP g

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