基于STM8单片机的分区墨量控制系统设计

为提高胶印机墨量控制系统的稳定性和控制精度,提出了一款以STM8S208MB单片机为主控芯片、以直流减速电机为控制对象的电机控制系统,并设计了完整的硬件电路、上位机软件以及下位机程序。此方法可以实现用PC机在线监测所有墨键位置信息,并直接通过RS485总线向单片机发送指令,通过单片机控制直流减速电机的正反转动,以实现对墨键开度的精准调节。经测试,此系统驱动性能良好,抗干扰能力强,能够达到设计要求。     

Investigation of the in vivo antioxidative activity of Cynara scolymus (artichoke) leaf extract in the streptozotocin‐induced diabetic rat

The in vivo antioxidant activity of a quantified leaf extract of Cynara scolymus (artichoke) was studied. The aqueous artichoke leaf extract (ALE), containing 1.5% caffeoylquinic acid with chlorogenic acid being most abundant (0.30%), and luteolin‐7‐O‐glucoside as major flavonoid (0.15%), was investigated by evaluating the effect on different oxidative stress biomarkers, after 3 wk oral supplementation in the streptozotocin‐induced diabetic rat model. Apart from two test groups (0.2 g ALE/kg BW/day and 1 g ALE/kg BW/day, where BW is body weight), a healthy control group, untreated oxidative stress group, and vitamin E treated group (positive control) were included. A 0.2 g/kg BW/day of ALE decreased oxidative stress: malondialdehyde and 8‐hydroxydeoxyguanosine levels significantly diminished, whereas erythrocyte glutathione levels significantly increased. A 1.0 g/kg BW/day ALE did not show higher antioxidant activity.     

镇泾油田长81段储层测井相研究

利用镇泾油田37口井的岩心资料和EMI微电阻率成像测井资料来确定岩性相标志特征,系统地对长81段储层进行划分和对比,建立了地质-测井的沉积微相模式,在单井沉积微相分析、对比和多井连井剖面对比图的基础上,通过沉积相相标志物的层次结构分析法和沉积体系分析法,结合测井相分析等多学科综合研究方法,确定了研究区沉积相及砂体的空间...     

8mm三次谐波潘尼管的理论设计与粒子模拟研究

潘尼管是利用电子在高频结构中的位置选择机制实现注波净能量交换的回旋器件,具有高效率与低磁场的显著特点。本文在简述其基本原理的基础上,研究了其设计理论与方法,进行了相应的数值计算,设计了一只8 mm波段三次回旋谐波潘尼管:采用4开槽渐变到圆波导的开放式谐振腔高频结构,2π工作模式,束电压43.5 kV,束电流1.45 A,最后采用3D-PIC模拟软件进行验证、优化。模拟结果显示,该器件可获得37.8 kW平均输出功率,器件效率可达到60%,展示了其作为高效永磁包装器件的良好应用前景。     

等温退火对Alnico8合金微观结构的影响

利用透射电镜(TEM)和X射线小角衍射技术(SAXS)研究了磁场等温退火工艺参数对Alnico8合金的微观组织的影响,样本的晶格结构清晰可见。结果表明,在等温退火阶段Alnico8合金通过调幅分解形成两相结构,棒状的铁磁相(1α相)粒子高度有序地弥散在弱磁性相(2α相)当中。其中,1α相的平均长度由SAXS测得,并与TEM照片数据进行了验证比对。本文着重研究了1α相粒子平均长度随等温退火处理的温度及时间参数的改变规律,结果显示样本的磁性能与其微观结构有一定相关性。     

8-羟基喹啉萃取处理氯化亚铜废水的研究

通过预曝气的方法,简化了氯化亚铜废水溶液的粒子结构,采用8-羟基喹啉作为萃取剂,对曝气后溶液进行萃取实验。考察萃取平衡时间、曝气时间、温度等因素对废水处理效果的影响规律,确定了最佳反应条件,为优化萃取法处理氯化亚铜废水提供技术参考。     

苏77-5-8H井大斜度穿煤层安全钻井技术

苏77-5-8H井为苏里格气田苏77区块第一口利用水平井提高山23组开发效益的大斜度穿煤层水平井,目的层山23储集砂岩上部发育厚度25～30 m的碳质泥岩和煤层段,由于煤系地层的特殊性,钻进过程中易坍塌,且煤系地层正好处于入靶前的造斜井段,钻井施工难度大、风险高。在分析了煤层井壁稳定机理基础上,针对苏77区块地层特性和水平井钻井施工的难点,分析了该井主要技术难点,重点从井眼轨迹轨道设计优化、轨迹控制及施工技术措施和钻井液技术等方面对该井安全技术进行了全面的介绍,为今后同类井钻井提供可参考的经验。     

Synthesis and photovoltaic properties of an alternating phenylenevinylene copolymer with substituted-triphenylamine units along the backbone for bulk heterojunction and dye-sensitized solar cells

We have fabricated bulk heterojunction (BHJ) photovoltaic devices based on the as cast and thermally annealed P:[6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) blends and found that these devices gave power conversion efficiency (PCE) of about 1.15 and 1.60% respectively. P is a novel alternating phenylenevinylene copolymer which contains 2-cyano-3-(4-(diphenylamino)phenyl)acrylic acid units along the backbone and was synthesized by Heck coupling. This copolymer was soluble in common organic solvents and showed long-wavelength absorption maximum at 390-420 nm with optical band gap of 1.94 eV. The improvement of PCE after thermal annealing of the device based on the P:PCBM blend was attributed to the increase in hole mobility due to the enhanced crystallinity of P induced by thermal treatment. In addition, we have fabricated BHJ photovoltaic devices based on the as cast and thermally annealed PB:P:PCBM ternary blend. PB is a low band gap alternating phenylenevinylene copolymer with BF₂-azopyrrole complex units, which has been previously synthesized in our laboratory. We found that the device based on this ternary blend exhibited higher PCE (2.56%) as compared to either P:PCBM (1.15%) or PB:PCBM (1.57%) blend. This feature was associated with the well energy level alignment of P, PB and PCBM, the higher donor-acceptor interfaces for the exciton dissociation and the improved light harvesting property of the ternary blend. The further increase in the PCE with thermally annealed ternary blend (3.48%) has been correlated with the increase in the crystallinity of both P and PB. Finally, we used copolymer P as sensitizer for quasi solid state dye-sensitized solar cell and we achieved PCE of approximately 3.78%.     

克拉玛依油田八区克下组沉积相精细研究

克拉玛依油田八区克下组油藏位于准噶尔盆地西北缘克乌逆掩断裂带南白碱滩断裂下盘,属于一套山前陆相盆地边缘冲积扇沉积.冲积扇体其有独立的成藏体系,针对这一典型特征,充分运用砾岩组分和重矿物资料,落实八区克下组发育的三大冲积扇体,并在充分研究各沉积微相发育特征的基础上,确定了扇体的平面展布.最后结合油田生产状况,研究了剩余油...