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改良经皮内镜下腰椎椎间融合术治疗腰椎管狭窄症

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中国现代手术学杂志 2024年第4期28卷 306-310页

作者：王玉林陈开伟武振国蔡杰彭小忠广西医科大学第四附属医院广西柳州545000

目的初步探讨改良经皮内镜下腰椎椎间融合术(endoscopic transforaminal lumbar interbody fusion,Endo-TLIF)的手术体会及早期临床疗效。方法回顾性分析2019年8月至2020年9月在本院行改良Endo-TLIF治疗的30例腰椎管狭窄患者的临床资料... 详细信息

目的初步探讨改良经皮内镜下腰椎椎间融合术(endoscopic transforaminal lumbar interbody fusion,Endo-TLIF)的手术体会及早期临床疗效。方法回顾性分析2019年8月至2020年9月在本院行改良Endo-TLIF治疗的30例腰椎管狭窄患者的临床资料。将传统五孔法的Endo-TLIF手术改良为4个切口,其中症状侧下位椎弓根切口改良为斜切口,经此切口置入通道,进行减压和植骨融合,经该切口及其他3个切口置入经皮椎弓根螺钉内固定。记录患者的术中出血量、手术时间、住院时间以及并发症情况,采用疼痛视觉模拟评分(visual analogue scale,VAS)、Oswestry功能障碍指数(Oswestry disability index,ODI)和改良MacNab疗效评定标准评价临床疗效,术后6个月行CT检查,采用Bridwell标准评价椎间融合情况。结果所有患者均顺利完成手术,术中出血量(35.1±14.7)mL,手术时间(107.2±30.4)min,住院时间(4.4±1.2)d。30例患者获得平均(15.6±3.7)个月的随访。术前、术后第一天、术后3个月、末次随访时患者腰痛VAS分别为5.67±1.71,2.22±1.27,1.67±0.81,0.67±0.32;腿痛VAS评分为6.27±1.68,3.02±1.65,1.24±0.63,0.54±0.34;术前、术后3个月、末次随访时ODI(%)分别为57.13±15.39,13.78±2.28,8.72±2.35。与术前相比,术后腰腿痛VAS和ODI均明显下降(P<0.05)。末次随访时改良MacNab疗效评定:优21例,良5例,可4例,优良率86.7%(26/30)。术后发生1例融合器下沉,2例神经根骚扰并出现下肢麻痛症状,经过保守治疗后均恢复正常。结论改良Endo-TLIF治疗腰椎椎管狭窄症具有创伤小、出血少、康复快等优点,且术后疗效满意,长期疗效有待观察。

关键词：腰椎管狭窄症内镜下经椎间孔椎体间融合术

6xxx系铝合金弧焊与高功率激光焊组织性能对比

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有色金属加工 2020年第2期49卷 16-19页

作者：林相远张威王利周金旭吴振国辽宁忠旺集团有限公司辽宁辽阳111003

该研究采用高功率激光填丝焊(LFW)、熔化极惰性气体保护焊(MIG)以及钨极氩弧焊(TIG)的方法,对6005A-T6挤压铝合金进行焊接。进行LFW焊后,焊接接头抗拉强度为211MPa,接头系数0.77,焊接接头硬度最低值为68.3HV1且位于热影响区。进行MIG焊... 详细信息

该研究采用高功率激光填丝焊(LFW)、熔化极惰性气体保护焊(MIG)以及钨极氩弧焊(TIG)的方法,对6005A-T6挤压铝合金进行焊接。进行LFW焊后,焊接接头抗拉强度为211MPa,接头系数0.77,焊接接头硬度最低值为68.3HV1且位于热影响区。进行MIG焊后,焊接接头抗拉强度为190MPa,接头系数0.70,焊接接头硬度最低值为50.7HV1且位于热影响区。进行TIG焊后,焊接接头抗拉强度为181MPa,接头系数0.66,焊接接头硬度最低值为50.4HV1且位于热影响区。

关键词： 6005A-T6铝合金激光填丝焊 TIG焊 MIG焊

Co_(3)O_(4)as an efficient passive NO_(x) adsorber for emission control during cold-start of diesel engines

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Chinese Journal of Chemical Engineering 2024年第2期66卷 1-7页

作者： Jinhuang Cai Shijie Hao Yun Zhang Xiaomin wu zhenguo Li Huawang Zhao Department of Environmental Science&Engineering College of Chemical EngineeringHuaqiao UniversityXiamen 361021China wuxi Weifu Environmental Catalysts Co. LtdWuxi 214000China National Engineering Laboratory for Mobile Source Emission Control Technology China Automotive Technology&Research Center Co.Ltd.Tianjin 300300China

The Co_(3)O_(4)nanoparticles,dominated by a catalytically active(110)lattice plane,were synthesized as a low-temperature NO_(x) adsorbent to control the cold start emissions from *** nanoparticles boast a substantial quantity of active chemisorbed oxygen and lattice oxygen,which exhibited a NO_(x) uptake capacity commensurate with Pd/SSZ-13 at 100℃.The primary NO_(x) release temperature falls within a temperature range of 200-350℃,making it perfectly suitable for diesel *** characterization results demonstrate that chemisorbed oxygen facilitate nitro/nitrites intermediates formation,contributing to the NO_(x) storage at 100℃,while the nitrites begin to decompose within the 150-200℃***,lattice oxygen likely becomes involved in the activation of nitrites into more stable nitrate within this particular temperature *** concurrent processes of nitrites decomposition and its conversion to nitrates results in a minimal NO_(x) release between the temperatures of 150-200℃.The nitrate formed via lattice oxygen mainly induces the NO_(x) to be released as NO_(2) within a temperature range of 200-350℃,which is advantageous in enhancing the NO_(x) activity of downstream NH_(3)-SCR catalysts,by boosting the fast SCR reaction *** to its low cost,considerable NO_(x) absorption capacity,and optimal release temperature,Co_(3)O_(4)demonstrates potential as an effective material for passive NO_(x) adsorber applications.

关键词： Emission control Cold-start Low-temperature adsorption Co_(3)O_(4) Nitrate formation

Accessory ligand strategies for hexacyanometallate networks deriving perovskite polycrystalline electromagnetic absorbents

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Journal of Materials Science & Technology 2021年第23期82卷 69-79页

作者： zhenguo Gao Zehao Zhao Di Lan Kaichang Kou Jiaoqiang Zhang Hongjing wu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an710072China MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary School of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an710072China

The controllable adjustment of electromagnetic(EM)properties for high-efficiency EM absorbents are indispensable,nonetheless,rare in crystals engineering ***,for the first time,regulated amount of sodium citrate was employed as accessory ligand of cobalt cation in aqueous solution to kinetically assist the controllable fabrication of Prussian blue analogs(PBAs)and corresponding lanthanide perovskite hybrid Co Fe alloy ***,the multi-phase features were analyzed based on Rietveld refinement of XRD patterns,illustrating the existence of distortions,defects and heterogeneous interfaces in resultant *** to the dielectric and magnetic adjustment,polycrystalline absorbents achieved excellent impedance matching and EM attenuation,as the minimum reflection loss of Co Fe/La FeO_(3)and Co Fe/La FeO_(3)/La_(2)O_(3)reached-44.13 and-33.95 d B,ranking broadest effective bands up to 4.88 and 3.36 *** validity of the strategy provided a novel sight into the controllable fabrication of high-performance magnetic semiconductor polycrystalline devices.

关键词： Sodium citrate Prussian blue analogs Polycrystalline Electromagnetic absorption Interfacial polarization

Adaptive Control for a Class of Time-delay Nonlinear Systems with Unknown Control Coefficients

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Adaptive Control for a Class of Time-delay Nonlinear Systems...

A hybrid LES (Large Eddy Simulation)/assumed sub-grid PDF (Probability Density Function) model for supersonic turbulent combustion

第25届中国控制与决策会议

作者： zhenguo Liur Yuqiang wu School of Automation Southeast University Institute of Automation. Qufu Normal University

ISBN: (纸本)9781467355322

This paper investigates the adaptive control for a class of high-order time-delay nonlinear systems with unknown control coefficients. Base on the method of adding a power integrator and by using the backstepping approach, an adaptive stabilizing controller independent of time-delay is successfully constructed. The controller guarantees that all states of the whole closed-loop system are globally uniformly bounded, and makes the original system states globally asymptotically converge to zero. Finally, a numerical example is given to illustrate the effectiveness of the control scheme.

关键词： Time-delay Adding apower integrator Lyapunov-Krasovskii Functional Adaptive Control

来源： cnki会议评论

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Science China(Technological Sciences) 2011年第10期54卷 2694-2707页

作者： WANG HongBo QIN Ning SUN MingBo wu HaiYan WANG zhenguo College of Aerospace and Material Engineering National University of Defense Technology Changsha 410073 China Department of Mechanical Engineering University of Sheffield SheffieldS1 3JD UK

A hybrid LES (Large Eddy Simulation)/assumed sub-grid PDF (Probability Density Function) closure model has been devel-oped for supersonic turbulent combustion. Scalar transport equations for all species in a given chemical kinetic mechanism were solved, which are necessary in the supersonic combustion where the non-equilibrium chemistry is essentially involved. The clipped Gaussian PDF of temperature and multivariate ? PDF of composition were used to close the sub-grid chemical sources that appear in the conservation equations. The sub-grid variances of temperature and composition were constructed based on scale similarity approach. A semi-implicit approach based on the PDF model was proposed to tackle the resulting numerical stiffness associated with finite rate chemistry. The model was applied to simulate a supersonic, coaxial H2-air burner, where both the mean and rms (root mean square) results were compared with the experimental data. In general, good agree-ments were achieved, which indicated that the present sub-grid PDF method could work well in simulating supersonic turbu-lent combustion. Moreover, the calculation showed that the sub-grid fluctuations of temperature and major species in the combustion region were of the order of 10%-20% of their rms, while the sub-grid fluctuation of hydroxyl might be as high as 40%-50% of its rms.

关键词： LES(Large Eddy Simulation) assumed PDF(Probability Density Function) supersonic turbulent combustion

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磷酸铁型修复材料的制备及应用研究

当代化工研究 2024年第19期 177-180页

作者：吴振国李骞尹哲廖烺张雁杨永斌中南大学资源加工与生物工程学院湖南410083

全球正面临着严峻的土壤重金属污染问题,亟须采用科学有效的修复技术进行治理。固化/稳定化技术已被证明是一种行之有效的修复方法,其中含磷修复材料因其成本低廉和效果显著的优势,已成为极具潜力的稳定化修复材料。因此,本文研制了一... 详细信息

全球正面临着严峻的土壤重金属污染问题,亟须采用科学有效的修复技术进行治理。固化/稳定化技术已被证明是一种行之有效的修复方法,其中含磷修复材料因其成本低廉和效果显著的优势,已成为极具潜力的稳定化修复材料。因此,本文研制了一种绿色高效的新型固化/稳定化修复材料(F&P),其对Cd(Ⅱ)、Pb(Ⅱ)、Zn(Ⅱ)的饱和吸附量分别为219.6 mg/g、713.1 mg/g、129.9 mg/g。F&P材料为无定形非晶态结构,呈均匀且细小的球形颗粒,存在大量多孔空心结构,孔道结构明显。其主要固化机制为表面的磷酸盐基团和-OH基团与重金属离子络合形成稳定的磷酸盐沉淀。在添加质量分数为1%的F&P材料修复28天后,土壤中Cd、Pb、Zn的有效态含量分别降低了73%、75%、77%。

关键词：重金属土壤重金属污染含磷修复材料

Sulfonyldibenzene-based hole-transporting materials for efficient n-i-p perovskite solar cells

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Science China Chemistry 2021年第1期64卷 127-133页

作者： Tian Qin Fei wu Yingxiao Mu Yubo Long Linna Zhu Juan Zhao zhenguo Chi Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy School of Materials&EnergySouthwest UniversityChongqing 400715China PCFM Lab GDHPPC LabGuangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional FilmsState Key Laboratory of OEMTSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Organic hole-transporting materials(HTMs)are an essential component in conventional perovskite solar cells(PSCs).In this work,two sulfonyldibenzene-based molecules,named CS-04 and CS-05,are synthesized and employed as HTMs in n-i-p *** comparison with CS-04,the carbazole-substituted methoxytriphenylamine(Cz MOTPA)group in CS-05 exhibits an increased degree of molecular distortion,thus endowing CS-05 with excellent solvent solubility and film-formation ***,CS-05 shows a high hole mobility,superior hole extraction and hole transporting *** a result,CS-05 yields impressive device performances with a high power conversion efficiency(PCE)of 20.15%,while that of CS-04 based device is 19.50%,which is comparable to that of the Spiro-OMe TAD based control device(19.59%).This finding illustrates the potential of sulfonyldibenzene-based molecules for the applications in PSCs,and also provides a novel avenue to improve the performances and stability of PSCs by tailoring the sulfonyldibenzene-based molecules.

关键词： sulfonyldibenzene hole-transporting material perovskite solar cell

钠离子电池正极材料碳包覆磷酸钒钠的合成及电化学性能研究

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磷肥与复肥 2019年第9期34卷 28-30页

作者：刘小红冯桂林吴振国钟本和郭孝东四川大学化学工程学院

磷酸钒钠材料是钠离子电池的理想正极材料,但其较低的电子导电率导致了较差的倍率性能和长循环性能。采用EDTA作为碳源,溶胶凝胶法合成碳包覆的磷酸钒钠复合材料。XRD和FTIR测试表明合成的磷酸钒钠晶相纯度较高;扫描和透射电镜分析结果... 详细信息

磷酸钒钠材料是钠离子电池的理想正极材料,但其较低的电子导电率导致了较差的倍率性能和长循环性能。采用EDTA作为碳源,溶胶凝胶法合成碳包覆的磷酸钒钠复合材料。XRD和FTIR测试表明合成的磷酸钒钠晶相纯度较高;扫描和透射电镜分析结果表明合成的材料颗粒尺寸为微米级,碳主要包覆在磷酸钒钠颗粒的表面;当电压为2.3～2.8V、EDTA与磷酸钒钠物质的量之比为3∶3时,样品表现出较好的电化学性能,0.1 C下的初始容量为108.1 m A·h/g,接近理论容量。在1 C下循环600周后容量为93.2 mA·h/g;10 C下循环500周后的容量79.1 m A·h/g,容量保持率为91.23%。

关键词：钠离子电池正极材料磷酸钒钠电化学性能