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Removal of phenol by activated alumina bed in pulsed high-voltage electric field

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Journal of Environmental Sciences 2007年第4期19卷 409-415页

作者： ZHU Li-nan ma jun YANG shi-dong School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China

A new process for removing the pollutants in aqueous solution-activated alumina bed in pulsed high-voltage electric field was investigated for the removal of phenol under different conditions. The experimental results indicated the increase in removal rate with increasing applied voltage, increasing pH value of the solution, aeration, and adding Fe^2＋. The removal rate of phenol could reach 72.1% when air aeration flow rate was 1200 ml/min, and 88.2% when 0.05 mmol/L Fe^2＋ was added into the solution under the conditions of applied voltage 25 kV, initial phenol concentration of 5 mg/L, and initial pH value 5.5. The addition of sodium carbonate reduced the phenol removal rate. In the pulsed high-voltage electric field, local discharge occurred at the surface of activated alumina, which promoted phenol degradation in the thin water film. At the same time, the space-time distribution of gas-liquid phases was more uniform and the contact areas of the activated species generated from the discharge and the pollutant molecules were much wider due to the effect of the activated alumina bed. The synthetical effects of the pulsed high-voltage electric field and the activated alumina particles accelerated phenol degradation.

关键词： pulsed high-voltage electric field hybrid gas-liquid electrical discharge activated alumina phenol Fenton's reaction water treatment

Higher-Order Lagrangian Equations of Higher-Order Motive Mechanical System

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Communications in Theoretical Physics 2008年第2期49卷 479-481页

作者： ZHAO Hong-Xia ma Shan-jun shi Yong College of Physics and Communication Electronics Jiangxi Normal University Nanchang 330022 China

In this paper, if the condition of variation δt = 0 is satisfied, the higher-order Lagrangian equations and higher-order Hamilton＇s equations, which show the consistency with the results of traditional analytical mechanics, are obtained from the higher-order Lagrangian equations and higher-order Hamilton＇s equations. The results can enrich the theory of analytical mechanics.

关键词： higher-order Lagrange function Hamilton function higher-order Lagrangian equation

数据库技术“课程思政”教学探索与实践——以安徽国防科技职业学院为例

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河北北方学院学报（社会科学版） 2024年第2期40卷 99-101页

作者：朱小娟芮素文马士君安徽国防科技职业学院信息技术学院安徽六安237000

课程思政是高校落实立德树人根本任务的关键。通过深入挖掘数据库技术课程中蕴含的思政元素,科学设计数据库技术“课程思政”教学方法,将思政元素适时适度融入数据库技术教学全过程,提升课程育人质量。

关键词：课程思政数据库技术教学设计

后路连续肌间沟臂丛神经阻滞联合帕瑞昔布钠超前镇痛对肩关节镜手术患者的应用效果

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现代生物医学进展 2024年第14期24卷 2737-2741,2756页

作者：秦艳马世军范晓英张海鹰张万平西安医学院第二附属医院手麻科陕西西安710038 空军军医大学第二附属医院唐都医院麻醉科陕西西安710032

目的:探讨后路连续肌间沟臂丛神经阻滞联合帕瑞昔布钠超前镇痛对肩关节镜手术患者的应用效果。方法:选取2020年1月到2023年1月收治的80例肩关节镜手术患者,分为A、B、C三组,A组25例、B组25例、C组30例。A组采取常规静脉麻醉,B组采取常... 详细信息

目的:探讨后路连续肌间沟臂丛神经阻滞联合帕瑞昔布钠超前镇痛对肩关节镜手术患者的应用效果。方法:选取2020年1月到2023年1月收治的80例肩关节镜手术患者,分为A、B、C三组,A组25例、B组25例、C组30例。A组采取常规静脉麻醉,B组采取常规静脉麻醉联合后路连续肌间沟臂丛神经阻滞组,C组患者采取后路连续肌间沟臂丛神经阻滞组联合帕瑞昔布钠超前镇痛。对比三组患者入室时(T_(1)),手术10 min(T_(2)),手术30 min(T_(3)),手术结束即刻(T_(4))心率、血氧及血压水平变化,皮质醇(COR)、去甲肾上腺素(NE)相关应激反应指标水平变化,对比三组患者不良反应发生率,最后对所有患者进行6个月门诊复查随访,分别在术前、术后1个月、3个月、6个月采用Constant-Murley评分评价三组患者肩关节功能情况。结果:三组患者T_(1)、T_(4)时间三组患者心率、血氧饱和度、收缩压及舒张压对比无明显差异(P>0.05),C组患者T_(2)、T_(3)时间心率、血氧饱和度、收缩压及舒张压水平明显低于A组和B组(P0.05),T_(2)、T_(3)时间三组患者COR、NE表达水平升高,且C组患者T_(2)、T_(3)、T_(4)时间COR、NE表达水平低于A组及B组(P0.05);三组患者术前Constant-Murley评分对比无差异,术后1个月、3个月、6个月三组患者Constant-Murley评分均升高,且C组高于A组和B组(P<0.05)。结论:针对肩关节镜手术患者术中采取后路连续肌间沟臂丛神经阻滞组联合帕瑞昔布钠超前镇痛,可稳定患者术中血氧饱和度、心率及血压水平,降低患者术中应激反应,且安全性较高,同时还可进一步辅助患者改善远期肩关节功能。

关键词：后路连续肌间沟臂丛神经阻滞帕瑞昔布钠超前镇痛肩关节镜应激反应肩关节功能

Biophysical-driven piezoelectric and aligned nanofibrous scaffold promotes bone regeneration by re-establishing physiological electrical microenvironment

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Nano Research 2024年第8期17卷 7376-7393页

作者： Aoao Wang Xinbo ma Yafeng Yang Guoliang shi Liwei Han Xiantong Hu Rui shi jun Yan Quanyi Guo Yantao Zhao Senior Department of Orthopedics the Fourth Medical Center of PLA General HospitalBeijing 100048China Department of Chemistry Capital Normal UniversityBeijing 100048China National Center for Orthopaedics Beijing Research Institute of Traumatology and OrthopaedicsBeijing Jishuitan HospitalCapital Medical UniversityBeijing 100035China Xijing 986 Hospital Department The Fourth Military Medical UniversityXi'an 710032China Institute of Orthopedics Chinese PLA General HospitalBeijing Key Laboratory of Regenerative Medicine in OrthopedicsKey Laboratory of Musculoskeletal Trauma&War Injuries PLABeijing 100853China

The initial healing stages of bone fracture is a complex physiological process involving a series of spatially and temporally overlapping events,including pathogen clearance,immunological modulation,and *** this study,we have developed a piezoelectric and aligned nanofibrous scaffold composed of ZnO@PCL/PVDF with multiple antibacterial,immunomodulatory,and osteogenic effects using electrospinning *** scaffold’s piezoelectric signal output under ultrasound(US)control can be similar to the physiological electrical signals of healthy bone tissue,creating a truly biomimetic electrical microenvironment in the bone *** vitro studies have shown that ZnO@PCL/PVDF scaffold significantly enhances the proliferation,migration,and osteogenic differentiation of MC3T3-E1 cells under piezoelectric drive provided by ***,the scaffold exhibits inhibitory effects on the growth of *** and ***,as well as the ability to induce M2 macrophage polarization,indicating potent antibacterial and immunomodulatory *** vivo experiments demonstrated that the ZnO@PCL/PVDF scaffold can accelerate the repair of mandibular defects in rats,effectively inhibit bacterial colonization,and reduce inflammatory ***,this study confirms that the newly developed ZnO@PCL/PVDF scaffold effectively promotes bone repair by truly mimicking the endogenous electrical microenvironment and precisely regulating the temporospatial disorders of initial bone healing,thus providing a simple and effective solution for bone defects.

关键词： piezoelectricity bone defect bacterial infection ZnO nanoparticles immunomodulation osteogenesis

Mechanical properties of multi-scale germanium specimens from space solar cells under electron irradiation

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Chinese Journal of Aeronautics 2024年第1期37卷 173-185页

作者： Jian QIU maliya HEINI Jusha ma Wenjia HAN Xunchun WANG jun YIN Yan shi Cunfa GAO State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Chemistry and Civil Engineering Shaoguan UniversityShaoguan 512005China Key Laboratory of Functional materials and Devices for Special Environments of Chinese Academy of Sciences Chinese Academy of SciencesUrumqi 830011China Shanghai Institute of Space Power-Sources Shanghai 200245China

During long-term service in space,Gallium Arsenide(GaAs)solar cells are directly exposed to electron irradiation which usually causes a dramatic decrease in their *** the multilayer structure of solar cells,the germanium(Ge)layer occupies the majority of the thickness as the *** to the intrinsic brittleness of semiconductor material,there exist various defects during the preparation and assembly of solar cells,the influences of which tend to be intensified by the irradiation *** this work,first,Ge specimens for mechanical tests were prepared at scales from microscopic to ***,after different doses of electron irradiation,the mechanical properties of the Ge specimens were *** experimental results demonstrate that electron irradiation has an obvious effect on the mechanical property variation of Ge in diverse *** four-point bending test indicates that the elastic modulus,fracture strength,and maximum displacement of the Ge specimens all increase,and reach the maximum value at the irradiation dose of 1×10^(15)e/cm^(2).The micrometer scale cantilever and nanoindentation tests present similar trends for Ge specimens after *** Force Microscope(AFM)also observed the change in surface ***,a fitting model was established to characterize the relation between modulus change and electron irradiation dose.

关键词： Electron irradiation Germanium Mechanical properties Multi-scale Space solar cells

Deformation monitoring of long-span railway bridges based on SBAS-InSAR technology

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Geodesy and Geodynamics 2024年第2期15卷 122-132页

作者： Lv Zhou Xinyi Li Yuanjin Pan jun ma Cheng Wang Anping shi Yukai Chen College of Geomatics and Geoinformation Guilin University of TechnologyGuilin 541004China Hubei Luo Jia Laboratory Wuhan 430079China Ecological Spatiotemporal Big Data Perception Service Laboratory Guilin 541004China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China China Railway Siyuan Survey and Design Group Co. Ltd.Wuhan 430063China

The deformation monitoring of long-span railway bridges is significant to ensure the safety of human life and *** interferometric synthetic aperture radar(In SAR)technology has the advantage of high accuracy in bridge deformation *** study monitored the deformation of the Ganjiang Super Bridge based on the small baseline subsets(SBAS)In SAR technology and Sentinel-1A *** analyzed the deformation results combined with bridge structure,temperature,and riverbed sediment *** results are as follows:(1)The Ganjiang Super Bridge area is stable overall,with deformation rates ranging from-15.6 mm/yr to 10.7 mm/yr(2)The settlement of the Ganjiang Super Bridge deck gradually increases from the bridge tower toward the main span,which conforms to the typical deformation pattern of a cable-stayed bridge.(3)The sediment scouring from the riverbed cause the serious settlement on the bridge’s east side compared with that on the west side.(4)The bridge deformation negatively correlates with temperature,with a faster settlement at a higher temperature and a slow rebound trend at a lower *** study findings can provide scientific data support for the health monitoring of long-span railway bridges.

关键词： SBAS-InSAR Long-span railway bridge Deformation monitoring Bridge structure Time series deformation

Distributed Optimal Formation Control for Unmanned Surface Vessels by a Regularized Game-Based Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 276-278页

作者： jun shi maojiao Ye the School of Automation Nanjing University of Science and TechnologyNanjing 210094China IEEE

Dear Editor,This letter explores optimal formation control for a network of unmanned surface vessels(USVs).By designing an individual objective function for each USV,the optimal formation problem is transformed into a noncooperative *** this game theoretic framework,the optimal formation is achieved by seeking the Nash equilibrium of the regularized game.A modular structure consisting of a distributed Nash equilibrium seeker and a regulator is proposed.

关键词： Regular seeking optimal

Survey on performance of vertical slot and nature-like fishways at Angu hydropower station, Southwest China

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Water Science and Engineering 2024年第1期17卷 83-91页

作者： jun-jian Sun Jia-yue shi Qi Zhang Xiao-tao shi jun-jun Tan PowerChina Huadong Engineering Corporation Limited Hangzhou 311122China Hubei International Science and Technology Cooperation Base of Fish Passage China Three Gorges UniversityYichang 443002China

To restore dam-blocked natural fish migratory passages,a growing number of artificial fishways have been built in water conservancy and hydropower projects in *** Angu hydropower station involved diverse important fish habitats in the lower reaches of the Daduhe River in Southwest ***,a vertical slot fishway(VSF)and a nature-like fishway(NLF)were built near the backwater area of the reservoir to connect the upstream and downstream *** and aquatic ecological surveys were conducted after the completion of the project to estimate the fish passing effect of the two *** results indicated that both fishways were in effective operation and could maintain the desired hydrodynamic conditions and be used by several local fish *** the survey,149 fish from 15 species and 111 fish from 17 species were captured by the traps in the VSF and NLF,respectively,while 1263 fish from 27 species were found in the downstream *** species captured in the VSF were not found in the NLF,and vice versa,which implied the different preferences of ***,3789 signals including 2099 upward ones and 1690 downward ones were monitored with an ultrasonic fish detector at the inlet of the *** findings revealed the characteristics of fish species observed in and near the fishways and provided valuable insights into the different fish passing capabilities of VSFandNLF.

关键词： Vertical slot fishway Nature-like fishway Aguatic ecological survey Fishwaymonitoring Statistical analysis