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Investigation on the vortical structures by the Liutex method in turbulent channels at Re_(τ)=180 with scalloped and triangular riblet control

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Journal of Hydrodynamics 2024年第1期36卷 35-52页

作者： Zhang-dan yu Shang Jiang Hai-dong yu bi-yu Pang Xin Dong Yi-qian Wang School of Mathematical Sciences Soochow UniversitySuzhou215006China Beijing Institute of Astronautical System Engineering Beijing100076China

Riblets are a series of small protrusions formed along the flow direction,which have been extensively studied as a passive turbulent drag reduction technique.Experiments and numerical simulations have shown that well-designed riblets can significantly reduce drag in turbulent flows,making them highly promising and valuable for various applications.In this study,we focus on a scalloped riblet,which is designed by smoothly connecting two third-order polynomials,and thus the sharpness of the tip and the curvature of the valley can be well defined.We conduct direct numerical simulations of turbulent channel with smooth plate,scalloped riblet-mounted and triangular riblet-mounted walls.Width in wall units of W^(+)=20 and height-width ratio ofγ=0.5 are selected for both riblet cases.Compared with the smooth plate case,the scalloped riblet case achieves an 8.68%drag reduction,while the triangular riblet case achieves a 4.79%drag reduction.The obtained drag reduction rate of the triangular riblet is consistent with previous experiments and simulations,and the results indicate that the scalloped riblet is more effective in reducing drag and deserves further investigation.We compare turbulent statistics of the scalloped riblet case with those of the triangular riblet case.The mean velocity profiles of riblets are similar,but both the Reynolds shear stress and second-order statistics of velocity fluctuations and Liutex are significantly reduced in the scalloped riblets controlled turbulent channel,indicating that the scalloped riblet can more effectively suppress the spanwise and wall-normal turbulent intensity near the wall.We also compare the pre-multiplied spectra of streamwise velocity and streamwise Liutex component for the three cases to investigate the energy distribution and characteristics of Liutex distribution.The Liutex vortex identification method is also utilized to analyze the instantaneous flow field,which provides insights into the flow field and could be beneficial for the further optimization of riblet.

关键词： Liutex vector riblet drag reduction tip sharpness turbulent channel scalloped

Effects of intensive psychological intervention on treatment compliance,psychological status,and quality of life of patients with epilepsy

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World Journal of Psychiatry 2024年第5期14卷 670-677页

作者： Su-Hua Zhang Jie-Hua Wang Hong-yu Liu yue-Xia Zhang Ya-Ling Lin bi-yu Wu Department of Neurology Quanzhou First HospitalQuanzhou 362000Fujian ProvinceChina Department of Nursing Quanzhou First HospitalQuanzhou 362000Fujian ProvinceChina

BACKGROUND Epilepsy is a nervous system disease characterized by recurrent attacks,a long disease course,and an unfavorable prognosis.It is associated with an enduring therapeutic process,and finding a cure has been difficult.Patients with epilepsy are predisposed to adverse moods,such as resistance,anxiety,nervousness,and anxiety,which compromise treatment compliance and overall efficacy.AIM To explored the influence of intensive psychological intervention on treatment compliance,psychological status,and quality of life(QOL)of patients with epilepsy.METHODS The clinical data of 105 patients with epilepsy admitted between December 2019 and July 2023 were retrospectively analyzed,including those of 50 patients who underwent routine intervention(control group)and 55 who underwent intensive psychological intervention(research group).Treatment compliance,psychological status based on the Self-Rating Anxiety Scale(SAS)and Depression Scale Self-Rating Depression Scale(SDS)scores,hope level assessed using the Herth Hope Scale(HHS),psychological resilience evaluated using the Psychological Resilience Scale,and QOL determined using the QOL in Epilepsy-31 Inventory(QOLIE-31)were comparatively analyzed.RESULTS Treatment compliance in the research group was 85.5%,which is significantly better than the 68.0%of the control group.No notable intergroup differences in preinterventional SAS and SDS scores were identified(P>0.05);however,after the intervention,the SAS and SDS scores decreased significantly in the two groups,especially in the research group(Pbited no significant differences in preinterventional HHS,Connor-Davidson Resilience Scale(CD-RISC),and QOLIE-31 scores(P>0.05).After 6 months of intervention,the research group showed evidently higher HHS,CD-RISC,tenacity,optimism,strength,and QOLIE-31 scores(P<0.05).CONCLUSION Intensive psychological intervention enhances treatment compliance,psychological status,and QOL of patients with epilepsy.

关键词： Intensive psychological intervention Epilepsy Treatment compliance Psychological status Quality of life

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生物炭缓解作物干旱胁迫及其机理研究综述

节水灌溉 2024年第3期 75-82页

作者：翟必宇王娟扬州大学水利科学与工程学院江苏扬州225009

干旱是世界农业发展中主要的障碍因子之一,严重威胁着国家粮食安全和生态可持续发展,生物炭是一种富含碳的生物质再生产物,作为一种高效的土壤改良剂,不仅能改善土壤理化结构,提高土壤持水能力,同时缓解干旱胁迫对作物的负面效应。综述... 详细信息

干旱是世界农业发展中主要的障碍因子之一,严重威胁着国家粮食安全和生态可持续发展,生物炭是一种富含碳的生物质再生产物,作为一种高效的土壤改良剂,不仅能改善土壤理化结构,提高土壤持水能力,同时缓解干旱胁迫对作物的负面效应。综述了生物炭缓解作物干旱胁迫效应的研究成果,包括促进作物生长发育、增强作物抵御干旱能力、改善土壤理化特性和微生物学特性等,重点阐述生物炭特性与缓解干旱胁迫效应之间的联系和关键机制。最后初步阐述国内外研究存在的差异和需要加强的方面,并展望了生物炭在缓解干旱胁迫方面的应用潜力,旨在为生物炭的进一步推广应用提供理论依据和参考。

关键词：生物炭作物干旱胁迫土壤

Active metasurface via magnetic control for tri-channel polarization multiplexing holography

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Chinese Optics Letters 2024年第4期22卷 112-118页

作者：毕钰黄玲玲李拓王长红邹晓峰周朗康果果 Shandong Inspur Artificial Intelligence Research Institute Company Limited Jinan 250013China MIIT Key Laboratory of Photonics Information Technology School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

Active metasurfaces have recently attracted more attention since they can make the light manipulation be versatile and real-time. Metasurfaces-based holography possesses the advantages of high spatial resolution and enormous information capacity for applications in optical displays and encryption. In this work, a tunable polarization multiplexing holographic metasurface controlled by an external magnetic field is proposed. The elaborately designed nanoantennas are arranged on the magneto-optical intermediate layer, which is placed on the metallic reflecting layer. Since the non-diagonal elements of the dielectric tensor of the magneto-optical material become non-zero values once the external magnetic field is applied,the differential absorption for the left and right circularly polarized light can be generated. Meanwhile, the amplitude and phase can be flexibly modulated by changing the sizes of the nanoantennas. Based on this, the dynamic multichannel holographic display of metasurface in the linear and circular polarization channels is realized via magnetic control, and it can provide enhanced security for optical information storage. This work paves the way for the realization of magnetically controllable phase modulation, which is promising in dynamic wavefront control and optical information encryption.

关键词： active metasurface magneto-optical effect polarization multiplexing holography dynamic holographic display

全球价值链重构视域下数字创意产业高质量发展的机理、路径与中国对策

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艺术百家 2024年第1期40卷 56-63页

作者：车树林贾必玉余成雷南京财经大学经济学院江苏南京210023

面对全球价值链重构与国际分工格局大调整的机遇与挑战,如何塑造中国数字创意产业竞争新优势,摆脱“低端锁定”与“高端封锁”双重困境,从而实现高质量发展日益引起关注。全球价值链嵌入影响数字创意产业高质量发展,主要通过竞争创新效... 详细信息

面对全球价值链重构与国际分工格局大调整的机遇与挑战,如何塑造中国数字创意产业竞争新优势,摆脱“低端锁定”与“高端封锁”双重困境,从而实现高质量发展日益引起关注。全球价值链嵌入影响数字创意产业高质量发展,主要通过竞争创新效应、产业关联效应、规模经济效应和吸收门槛效应四个作用机制实现。在全球价值链重构视域下,推动数字创意产业高质量发展,需要走技术应用创新、内容生产创新、制度治理创新以及业态融合创新等中高端发展路径。然而,上述作用机制和实现路径对于特定国家或地区而言,只是提供了一种可能性而非必然性。目前中国数字创意产业发展既有优势也有不足,应该紧抓全球价值链重构的契机,推动数字创意产业积极迈向全球价值链中高端,实现高质量跨越式发展。为此,本文提出提高技术创新能力、强化内容生产创作、建立互动竞争机制、创造稳定政策环境、重视知识产权保护、加强供应链式整合等对策建议。

关键词：全球价值链数字创意产业高质量发展升级路径

新农科背景下“动物微生物与免疫技术”课程思政体系建设与实施

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工业微生物 2024年第1期54卷 110-112页

作者：毕宇黄冈职业技术学院生物与农业学院湖北黄冈438002

新农科建设提出要为乡村振兴发展提供有力的现代农业领军人才,加强课程思政建设是培养知农爱农新型人才的重要举措。文章对高职畜牧兽医专业“动物微生物与免疫技术”课程思政体系建设进行了分析,充分挖掘课程思政元素,并将其融入理论... 详细信息

新农科建设提出要为乡村振兴发展提供有力的现代农业领军人才,加强课程思政建设是培养知农爱农新型人才的重要举措。文章对高职畜牧兽医专业“动物微生物与免疫技术”课程思政体系建设进行了分析,充分挖掘课程思政元素,并将其融入理论课和实训课中,形成“三结合”的思政教学模式,以期为深化涉农专业课程的思政融入提供参考。

关键词：课程思政新农科动物微生物与免疫技术

Applying risk management to analytical methods for the desorbing process of ginkgo diterpene lactone meglumine injection

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Chinese Journal of Natural Medicines 2018年第5期16卷 366-374页

作者： XU Fang-Fang bi yu-an HUANG Wen-Zhe WANG Zhen-Zhong XIAO Wei Nanjing University of Traditional Chinese Medicine Nanjing 210000 China Jiangsu Kanion Pharmaceutical Co. Ltd. Lianyungang 222000 China State Key Laboratory of New-techfor Chinese Medicine Pharmaceutical Process Lianyungang 222001 China

Analysis errors can occur in the desorbing process of ginkgo diterpene lactone meglumine injection(GDMI) by a conventional analysis method, due to several factors, such as easily crystallized samples, solvent volatility, time-consuming sample pre-processing, fixed method, and offline analysis. Based on risk management, near-infrared(NIR) and mid-infrared(MIR) spectroscopy techniques were introduced to solve the above problems with the advantage of timely analysis and non-destructive nature towards samples. The objective of the present study was to identify the feasibility of using NIR or MIR spectroscopy techniques to increase the analysis accuracy of samples from the desorbing process of GDMI. Quantitative models of NIR and MIR were established based on partial least square method and the performances were calculated. Compared to NIR model, MIR model showed greater accuracy and applicability for the analysis of the GDMI desorbing solutions. The relative errors of the concentrations of Ginkgolide A(GA) and Ginkgolide B(GB) were 2.40% and 2.89%, respectively, which were less than 5.00%. The research demonstrated the potential of the MIR spectroscopy technique for the rapid and non-destructive quantitative analysis of the concentrations of GA and GB.

关键词： Risk management Near-infrared Mid-infrared Desorbing process Ginkgolide A Ginkgolide B

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小麦赤霉病拮抗菌JB7的拮抗活性及鉴定

微生物学报 2024年第5期64卷 1580-1592页

作者：毕钰张琳余红凤王志刚徐伟慧李阳齐齐哈尔大学生命科学与农林学院黑龙江齐齐哈尔161006 黑龙江省农业微生物制剂产业化技术创新中心黑龙江齐齐哈尔161006 黑龙江省农用生物制剂产业化协同创新中心黑龙江齐齐哈尔161006

由禾谷镰刀菌(Fusarium graminearum,Fg)引起的赤霉病是限制小麦生产的主要病害之一。生物防治是一种高效且可持续的防治方法。【目的】从小麦种子内筛选具有抑制禾谷镰刀菌的菌株并对其生防潜力进行评估,为小麦赤霉病生防制剂的开发与... 详细信息

由禾谷镰刀菌(Fusarium graminearum,Fg)引起的赤霉病是限制小麦生产的主要病害之一。生物防治是一种高效且可持续的防治方法。【目的】从小麦种子内筛选具有抑制禾谷镰刀菌的菌株并对其生防潜力进行评估,为小麦赤霉病生防制剂的开发与利用提供菌种资源及理论支撑。【方法】采用平板对峙、孢子萌发法和无菌上清液抑菌试验筛选小麦种子内对禾谷镰刀菌具有拮抗活性的内生菌株;利用扫描电镜(scanning electron microscope,SEM)和共聚焦扫描电镜(confocal laser scanning microscope,CLSM)观察并分析无菌上清液对Fg的分生孢子形态、膜完整性以及胞内活性氧的影响;通过盆栽试验验证内生菌对小麦赤霉病的生防效果;应用二代Illumina HiSeq测序平台进行全基因组测序。【结果】从小麦种子中分离出一株高效抑制Fg生长的内生菌株JB7,其衰亡期无菌上清液对Fg孢子萌发抑制率高达85.23%。菌株JB7的无菌上清液使Fg孢子表面凹陷,破坏其细胞膜,造成核酸和蛋白质的渗漏,诱导Fg菌丝活性氧的累积,引起Fg菌丝可溶性蛋白和丙二醛含量的显著升高。该菌株具有分泌蛋白酶、纤维素酶、葡聚糖酶和产铁载体的能力。盆栽试验表明菌株JB7能显著降低小麦赤霉病的病情指数(P<0.05)。经全基因组学鉴定为甲基营养型芽孢杆菌(Bacillus methylotrophicus)JB7,该菌株基因组中含有12个抑菌功能的次级代谢产物合成基因簇。【结论】菌株JB7能抑制禾谷镰刀菌的生长,对小麦赤霉病有较强的防效,可作为生物防治小麦赤霉病的候选菌株。

关键词：小麦赤霉病禾谷镰刀菌甲基营养型芽孢杆菌生物防治活性氧积累

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二油品罐区油气回收系统简介及运行问题分析

山东化工 2024年第5期53卷 172-175页

作者：毕誉大连石化公司辽宁大连116031

由国家质量监督检验检疫总局和环境保护部联合颁发的《石油炼制工业污染物排放标准》(GB 31570—2015)对炼油企业罐区无组织排放的有机废气做出限制后,各炼油企业罐区设置了各种不同的油气回收系统来提高排放废气的标准。本文阐述了氮... 详细信息

由国家质量监督检验检疫总局和环境保护部联合颁发的《石油炼制工业污染物排放标准》(GB 31570—2015)对炼油企业罐区无组织排放的有机废气做出限制后,各炼油企业罐区设置了各种不同的油气回收系统来提高排放废气的标准。本文阐述了氮封的原理以及氮封在储罐应用中的效果,介绍了二油品罐区油气回收系统工艺原理及工艺流程,分析了油气回收系统在实际运行中存在的问题,并提出了相应的解决方案,以供同行研究人员参考。

关键词：氮封油气回收环保减排

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