本安型矿井地下水节能处理系统

针对传统矿井水处理工艺面临的能耗大、程序复杂、污染水质、设备投入高、建筑面积大等问题,本文提出一种新的本安型矿井地下水处理方案。该方案采用全气动驱动的膜净化技术实现,通过设计基于全气动驱动的动力装置、超滤膜、陶瓷膜和反渗透膜的膜处理净化等,实现矿井地下水的节能处理。最后,针对某煤矿矿井的实际情况,基于设计处理能力、设计指标、经济效益等分析,实现了该矿井整体经济效益优化评估,验证了本文的设计方案不但具有传统井下水处理系统的优势,而且能实现安全、环保、绿色、节能的水处理理念。     

人机协同支持下的小学英语写作教学研究

人工智能和大数据挖掘技术的快速发展,为精准化教学的有效开展提供了技术支撑。但在实际教学过程中,仍存在缺乏学生学情数据驱动教学的问题,故探索一种教师与计算机合理协同的工作模式意义重大。文章基于"人机协同"理念,以某小学英语写作教学的实际情况为切入点,构建小学英语写作评价指标体系,提出基于人机协同的小学英语写作教学模型,最后开展作文教学实践。研究表明,此模型能够精准定位写作的薄弱点,为教师开展精准化教学和学生个性化补救提供了数据支持,从而促进了小学生英语写作能力的提升。     

中西文化价值观比较与语用失误

文章从文化价值观入手，分析了东西文化价值观差异，探讨在英语使用中由于价值观干扰而导致的语用失误现象．     

Imaging Analysis by Means of Fractional Fourier Transform

Starting from the diffraction imaging process,we have discussed the relationship between optical imaging system and tional Fourier transform,and proposed a specific system which can form an inverse amplified image of input function.     

Basic fibroblast growth factor alleviates brain injury following global ischemia reperfusion in rabbits

The aim of this study was to explore the protective effect of basic fibroblast growth factor (bFGF) on brain injury following global ischemia reperfusion and its mechanisms. Brain injury following global ischemia was induced by four vessels occlusion and systemic hypotension. Twenty-four rabbits were randomized into three groups: group A, only dissection of vessels; group B, intravenous infusion of normal saline after reperfusion for 6 h; group C, 30 μg/kg bFGF injected intravenously at the onset of reperfusion, then infused with 10 μg/(kg·h) for 6 h. Serum neuron specific enolase (NSE), S-100B, tumor necrosis factor-α(TNF-α), interleukin-1 (IL-1), interleukin-8 (IL-8) were measured before ischemia, 30 min after ischemia, 0.5, 1, 3, 6 h after reperfusion. Brain water content was determined and cerebral histopathological damages were compared. NSE and S-100B were increased 1 h after reperfusion and reached their peaks 6 h after reperfusion, but were much higher in group B than those in group C 3, 6 h after reperfusion. In groups B and C, TNF-a was increased after ischemia and IL-1 and IL-8 were increased significantly 0.5 h after reperfusion, then reached their peaks 6 h, 3 h, 6 h after reperfusion respectively. TNF-a and IL-8 at the time points of 1 h and 3 h and IL-1 at 3 h and 6 h in group C were correspondingly lower than those in group B. These indices in group A were nearly unchanged. There were less severe cerebral histopathological damages in group C compared with group B, but no difference in brain water content. It could be concluded that bFGF alleviates brain injury following global ischemia and reperfusion by down-regulating expression of inflammatory factors and inhibiting their activities.     

关于川西北高职高专学校体育现状的初步研究

通过文献资料查阅和问卷调查等方法,对川西北部分高职高专院校的学校体育现状进行了研究,发现所调查的几所院校的体育教学和课外体育都存在许多不足,提出了相应的对策和发展建议。     

NFOA-BP融合算法及其在焚烧炉温度控制中的应用

污泥焚烧炉温度控制过程中,由于投入污泥块热值不均以及外界环境干扰,传统的PID控制不能快速稳定地将炉温控制在所需范围内。为适应环境变化,实现更高效的炉温控制,提出一种基于NFOA-BP算法的污泥焚烧温度控制方法。该方法将改进型果蝇算法与BP神经网络结合,通过NFOA算法优化神经网络的初始权重和阈值,进而提高神经网络的全局搜索能力。将NFOA-BP算法应用于污泥焚烧炉温度控制系统,与传统PID温度控制系统进行仿真对比实验。结果表明该系统响应平稳、迅速,超调减小,正确率达到95%以上,比传统PID调节方法提高5%左右。     

用ISP器件实现HDB3码的实验设计

提出了一种采用ISP大规模可编程器件实现高密度HDB3码的一种实验方法。该方法在Quartus2.1开发软件环境下,应用VHDL语言,采用ALTERA公司的在系统可编程器件EPM7064SCL44-5,在实验室实现了HDB3码,结果符合高密度HDB3码的要求。     

Effects of glucose and gibberellic acid on glucosinolate content and antioxidant properties of Chinese kale sprouts

Glucosinolates, anthocyanins, total phenols, and vitamin C, as well as antioxidant capacity, were investigated in Chinese kale sprouts treated with both glucose and gibberellic acid (GA₃). The combination of 3% (0.03 g/ml) glucose and 5 μol/L GA₃ treatment was effective in increasing glucosinolate content while glucose or GA3 treatment alone did not influence significantly almost all individual glucosinolates or total glucosinolates. The total phenolic content and antioxidant activity of Chinese kale sprouts were enhanced by combined treatment with glucose and GA₃, which could be useful in improving the main health-promoting compounds and antioxidant activity in Chinese kale sprouts.     

学校生源均衡缺失现象研究——叩问:治疗“择校“顽症背后的正义诉求

为平衡学校间的生源,促使学校均衡发展,教育行政部门采取了许多相关政策。然而,这些政策的执行结果没有完全达到政策追求的目标,在某些方面有失真现象。本研究从对学校生源均衡系列政策的分析入手,审视其失真的方面,并对规避政策的失真做了一些总结性分析。