广元地区含隐晶质难选石墨选矿试验研究

对四川广元地区含隐晶质难选石墨矿进行选矿试验研究,在确定最佳粗选条件和粗精矿再磨细度的基础上,采用5次再磨6次精选进行开路、闭路试验,最终使石墨固定碳含量从28.29%提高到83.80%,回收率达90.17%。     

微波传感器阵列信号在管截面上的灵敏度分布的研究

通过在小型垂直气固两相流实验台上进行的实验研究，获得了4个独立灵敏区中微波传感器阵列信号在管截面上的灵敏度分布情况，并通过优化扩展计算，得到了可用于微波层析成像技术的灵敏度分布矩阵。     

初始对准中常规六状态卡尔曼滤波器的应用

建立了常规六状态滤波器误差方程,进行了kalman滤波仿真,得到航向、姿态角误差和陀螺漂移误差量,进行补偿。仿真结果显示常规滤波器在初始对准中取得了较好的效果。     

定向井中钻柱摩擦阻力的研究

针对井眼中钻住的实际情况,综合考虑了钻柱拉力、浮力、钻住刚度、并眼状态及几何尺寸、洗井液枯滞力等因素对摩擦阻力的影响,从钻住的空间受力和力矩平衡原理出发,应用微分几何理论,建立了比较完善的接近实际钻井情况的钻柱摩擦阻力模型.应用该棋型对大庆地区8口定向并进行实际数据处理和分析,初步得出大庆萨中区井眼摩擦系数一般在0.15-0.21之间.平均摩擦系数为0.18.通过对摩擦阻力的分析可知,钻住所受侧向力和摩擦阻力沿整个钻柱并非线性分布,一般造斜段钻住所受侧向力较大,与现场情况基本吻合.     

含不饱和聚醚的新型聚羧酸类减水剂的合成与应用

采用了工业化的不饱和聚醚多元醇为反应单体,合成了一种高减水率,长缓凝时间的新型聚羧酸系高效减水剂.     

Channel Measurement and Path Loss Modeling from 220 GHz to 330 GHz for 6G Wireless Communications

Terahertz (THz) communication has been envisioned as a key enabling technology for sixthgeneration (6G).In this paper,we present an extensive THz channel measur...     

Transcriptomic Analysis Suggests Auxin Regulation in Dorsal-Ventral Petal Asymmetry of Wild Progenitor Sinningia speciosa

The establishment of dorsal–ventral (DV) petal asymmetry is accompanied by differential growth of DV petal size, shape, and color differences, which enhance ornamental values. Genes involved in flower symmetry in Sinningia speciosa have been identified as CYCLOIDEA (SsCYC), but which gene regulatory network (GRN) is associated with SsCYC to establish DV petal asymmetry is still unknown. To uncover the GRN of DV petal asymmetry, we identified 630 DV differentially expressed genes (DV-DEGs) from the RNA-Seq of dorsal and ventral petals in the wild progenitor, S. speciosa ‘ES’. Validated by qRT-PCR, genes in the auxin signaling transduction pathway, SsCYC, and a major regulator of anthocyanin biosynthesis were upregulated in dorsal petals. These genes correlated with a higher endogenous auxin level in dorsal petals, with longer tube length growth through cell expansion and a purple dorsal color. Over-expression of SsCYC in Nicotiana reduced petal size by regulating cell growth, suggesting that SsCYC also controls cell expansion. This suggests that auxin and SsCYC both regulate DV petal asymmetry. Transiently over-expressed SsCYC, however, could not activate most major auxin signaling genes, suggesting that SsCYC may not trigger auxin regulation. Whether auxin can activate SsCYC or whether they act independently to regulate DV petal asymmetry remains to be explored in the future.     

基于PLC的飞机纵向重心自动调节系统的设计与实现

介绍了一种利用PLC设计的飞机纵向重心自动调节系统,并对系统的工作原理和软硬件设计进行了详细说明。经过实际测试,该系统运行稳定、可靠,达到了预期的设计要求。     

浅谈一台干熄焦余热锅炉的设计

文章阐述了的工作原理,并介绍了该锅炉的技术参数和主要结构特征.干熄焦余热锅炉具有节能、环保以及改善焦炭质量等优越性,值得大力推广.     

分子生物学技术在浸矿微生物研究中的应用

分子生物学技术在浸矿微生物的研究中发挥着举足轻重的作用。总结了一些先进分子生物学技术在浸矿微生物鉴定和浸矿微生物基因工程育种两方面的应用情况,包括16S rRNA和16S rDNA基因序列分析技术、实时定量PCR技术、限制性片段长度多态性分析技术、荧光原位杂交技术、变性梯度凝胶电泳和温度梯度凝胶电泳技术、基因间隔序列分析技术、浸矿微生物质粒载体研究、外源基因导入浸矿微生物方法研究等。