工厂化生产金针菇技术的研究

金针菇沿用常规的食用菌生产方式,产量低,成本高,经济效益差。本课题采用了培养料微波杀菌;全封闭半自动转盘式接种机,脉冲亚紫外光的制备及运用于诱发子实体原基,栽培过程中的温湿度闭环自动控制,高频高压及高压静电技术净化培养室空气等新技术,使金针菇生产提高工效十倍以上,染菌率减少到2%以下,生物效益达100%,出菇整齐,健壮,商品价值高。     

Self‐Assembled Sugar‐Substituted Perylene Diimide Nanostructures with Homochirality and High Gas Sensitivity

A new symmetrical sugar‐based perylenediimide derivative PTCDI‐BAG is synthesized and its aggregate morphologies and formation mechanisms are studied in detail in the mixed solvent system water/N,N‐dimethylformamide (H₂O/DMF) with changing volume ratios. PTCDI‐BAG molecules self‐assemble into planar ribbons in 20/80 and 40/60 H₂O/DMF (v/v), but their chiralities are opposite according to recorded circular dichroism (CD) spectra. With a further increase of the water content, only left‐handed helical nanowires are obtained in 60/40 and 80/20 H₂O/DMF (v/v) mixtures. By combining density functional theory (DFT) calculations with the experimental investigations, it is proposed that kinetic and thermodynamic factors play key roles in tuning PTCDI‐BAG structures and helicity. The formation of the ribbon is thermodynamically controlled in the 20/80 H₂O/DMF system, but kinetically controlled nucleation followed by thermodynamically controlled self‐assembly plays the governing roles for the formation of nanoribbons in 40/60 H₂O/DMF. Devices based on single nanoribbons for hydrazine sensing exhibit better performance than nanofiber bundles obtained in this study and achiral nanostructures reported in previous study. This study not only provides an elaborated route to tuning the structures and helicity of PTCDI molecules, but also provides new possibilities for the construction of high‐performance nanodevices.     

Microstructure evolution and corrosion resistance in simulated CGHAZ of X80 high-deformability pipeline steel

In this study, the microstructure evolution and corrosion resistance in 0.5M Na₂CO₃-1 M NaHCO₃ solution of X80 high-deformability (X80HD) pipeline steel coarse-grained heat-affected zone (CGHAZ) with several heat input levels were investigated. It is shown that the microstructure of CGHAZ changes from bainite ferrite to granular bainite as the heat input increasing. In addition, the corrosion resistance and the stability of passive film of base material are better than those of CGHAZ with several heat input levels. Too small or too big heat input is inadvisable and better corrosion resistance of CGHAZ is attained when heat input is 30kJ/cm.     

混合动力电动汽车驱动系统设计与实现

本文阐述了混合动力电动汽车的结构和工作原理，设计并实现了一种基于SVPWM矢量控制的混合动力车驱动控制系统，给出了控制系统的软件流程，并对关键模块做了较详细的说明。驱动单元现场运行情况良好，其工作波形证明了其控制系统设计的正确性。     

In Situ Topochemical Transformation of ZnIn2S4 for Efficient Photocatalytic Oxidation of 5-Hydroxymethylfurfural to 2,5-Diformylfuran

Photocatalytic selective oxidation of 5-hydroxymethylfurfural (HMF) coupled H₂ production offers a promising approach to producing valuable chemicals. Herein, an efficient in situ topological transformation tactic is developed for producing porous O-doped ZnIn₂S₄ nanosheets for HMF oxidation cooperative with H₂ evolution. Aberration-corrected high-angle annular dark-field scanning TEM images show that the hierarchical porous O-ZIS-120 possesses abundant atomic scale edge steps and lattice defects, which is beneficial for electron accumulation and molecule adsorption. The optimal catalyst (O-ZIS-120) exhibits remarkable performance with 2,5-diformylfuran (DFF) yields of 1624 µmol h⁻¹ g⁻¹ and the selectivity of >97%, simultaneously with the H₂ evolution rate of 1522 µmol h⁻¹ g⁻¹. Mechanistic investigations through theoretical calculations show that O in the O-ZIS-120 lattice can reduce the oxidation energy barrier of hydroxyl groups of HMF. In situ attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) results reveal that DFF^* (C₄H₂(CHO)₂O^*) intermediate has a weak interaction with O-ZIS-120 and desorb as the final product. This study elucidates the topotactic structural transitions of 2D materials simultaneously with electronic structure modulation for efficient photocatalytic DFF production.     

Digital driver for 2-inch LTPS AM-OLED displays

Organiclightemittingdiode(OLED)displayshave beenattractingmoreattentionbecauseoftheirvariousadvantagesincludingsimplestructure,self emitting,fast responsetimeandwideviewingangle.Inthelastdec ade,thefocusofresearchisonimprovementofefficiency andreliability…     

多弹串联预装填式发射器内弹道过程的数值模拟

多弹串联预装填式发射器无传统发射器的运动部件，能实现超高射速，在未来战争中必将会有很重要的作用。本文建立了反映膛内规律的理论计算内弹道模型，并对该模型进行了数值模拟，分析了射击频率、装药量、行程长对最大膛压和初速的影响。     

身管弯曲度测量误差处理技术研究

给出了基于PSD(position sensing detector)传感器的弯曲度测量系统的基本硬件结构。分析了电路系统引起的系统误差和随机误差。提出了采用内插、曲线拟合、动态调零等技术消除电路部分系统误差及采用滤波抑制随机误差的处理方法。分析了机械系统由于机械加工、机械装配引起的系统误差．建立了误差模型。提出了通过最小二乘法求解误差参数和修正测量结果的误差处理方法。