Precipitating spinel into precursor glass and its assistance in crystallization

The crystallization phenomena of spinel in CaO-MgO-Al₂O₃-SiO₂-Fe₂O₃ glass have received much attention due to the particular role in preparation of glass-ceramic materials, which represent an effective option to manage hazardous waste. In this study, both preliminary spinel and secondary spinel were precipitated in the precursor glass. The formation of these spinel was meticulously assessed by a combination of X-ray diffractometry and scanning electron microscopy. The structure of the microenvironment in the precursor glass was characterized by Raman spectrums. These advanced techniques highlight the potential for one-step crystallization of the glass. The investigation, which focused on one-step crystallization, demonstrated the growth of pyroxene on spinel accompanying a migration of chromium. The results also show the microstructure of the obtained glass-ceramic was very dependent on the heat-treat temperature. This study not only unambiguously reveals the precipitation mechanisms of spinel but also provides more documentation for one-step crystallization in the glass-ceramics field.     

Sparse non-convex Lp regularization for cone-beam X-ray luminescence computed tomography

Cone-beam X-ray luminescence computed tomography (CB-XLCT) is an attractive hybrid imaging modality, and it has the potential of monitoring the metabolic processes of nanophosphors-based drugs in vivo. However, the XLCT imaging suffers from a severe ill-posed problem. In this work, a sparse nonconvex L_p (0?p?L₁ regularization. Further, an iteratively reweighted split augmented lagrangian shrinkage algorithm (IRW_SALSA-L_p) was proposed to efficiently solve the non-convex L_p (0?p?p-values (1/16, 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8) in both 3D digital mouse experiments and in vivo experiments. The results demonstrate that the proposed non-convex methods outperform L₂ and L₁ regularization in accurately recovering sparse targets in CB-XLCT. And among all the non-convex p-values, our L_p(1/4?p?相似文献   

Microenvironment and related genes predict outcomes of patients with cervical cancer: evidence from TCGA and bioinformatic analysis

Cervical cancer (CESC) is one of the most common cancers and affects the female genital tract. Consistent HPV infection status has been determined to be a vital cause of tumorigenesis. HPV infection may induce changes to the immune system and limit the host’s immune response. Immunotherapy is therefore essential to improving the overall survival of both locally advanced and recurrent CESC patients. Using 304 relevant samples from TCGA, we assessed immune cell function in CESC patients to better understand the status of both tumor micro-environment cells and immune cells in CESC. Functional enrichment analysis, pathway enrichment analysis, and PPI network construction were performed to explore the differentially expressed genes (DEGs). The analysis identified 425 DEGs, which included 295 up-regulated genes and 130 down-regulated genes. We established that upregulation of CCL5 was correlated with significantly better survival, meaning that CCL5 expression could serve as a novel prognostic biomarker for CESC patients. We further focused on CCL5 as a hub gene in CESC, as it had significant correlations with increased numbers of several types of immune cells. Cell-type fractions of M1 macrophages were significantly higher in the high-immune-scores group, which was associated with better overall survival. Finally, we concluded that CCL5 is a promising prognostic biomarker for CESC, as well as a novel chemotherapeutic target.     

中国首例缓倾铋铜金矿脉--曙光(小西南岔)铜金矿床研究新进展

据现场深入研究，结合多年生产实践，首次系统地描述了小西南岔矿床北山矿段缓倾斜铋铜金支矿脉的地质产状、规模、铜和金品位、自然铋与自然金的交生关系。在此基础上，进一步阐述了缓倾铋铜金矿脉对理论、应用研究及矿山确保铜和金入选品位的重要意义。     

工业稳定剂间歇过程计算机控制系统

介绍了1套由AB公司的第5代PLC——RSLogix5000和工业PC组成的工业稳定剂间歇过程计算机控制系统。较详细地介绍系统硬件、软件的构成，ControlNet现场总线网络通信的特点，OPC数据传输的优点。同时阐述了在系统硬件设计上如何保证硬件的安全性和抗干扰问题。运行结果表明。该控制系统具有维护简单、运行可靠性高、抗干扰能力强、传输数据速度快的特点。     

基于UC/OS-Ⅱ的网络控制系统通讯接口设计

基于UC／OS—Ⅱ实时操作系统的网络控制系统，通过以太网将服务器和各地控制器联结，可控制多个电机协调运动．服务器采用工业级计算机，客户端(控制器)采用集成网卡接口的嵌入式系统，通过交换机进行数据交换．系统根据IP地址将命令送给各控制器，同时将客户端状态返回，并通过检验校验字符的方式减少联网过程的握手次数．其通讯的最基本函数用标准C语言编写，生成静态库文件，可直接通过工程方式使用．其通讯接口包括联网初始化、服务器和客户端网络联接、以及控制、并常处理和维护等程序。     

热镀锌板(卷)工程设计中的环境保护问题

对热镀锌板(卷)的生产工艺、主要生产设备进行了简要介绍，并就其污染源(工序)、生产过程中产生的污染物及其控制措施进行了评述，同时就设计和生产中宜注意的几个环保问题进行了分析。     

天然气空气绝热转化制合成气催化剂研究

制备了天然气空气绝热转化催化剂,采用固定床反应器进行稳定性评价试验,对反应前后的催化剂进行了分析表征。结果说明,天然气和空气绝热转化反应放热形成的高温对催化剂有烧结作用,使催化剂晶体结构发生了变化,起活性作用的金属镍和氧化铝载体转化为镍铝尖晶石结构的物质。进一步的试验表明,在1050～1300℃的温度可以把催化剂的晶体结构改变。     

新型微光探测器激光防护材料的研究

系统分析了微光夜视器的结构及其原理，并结合当前器件存在的激光致盲威胁，提出了增强系统安全的新措施。同时，系统地介绍了防激光滤光材料一些重要的性能参数以及滤光材料的组成、制备加工工艺。研究结果表明，新型的防激光材料能够有效地防护800nm，900nm以及10613nm等三个波长的激光，并且可见光透过率大于85％。     

RFA—300型自动分析仪检测总植物碱的改进

对连续流动法测定烟草及烟草制品中总植物碱的各影响因素进行了试验研究,并根据试验结果对仪器管路进行相应的改造。实验结果表明,烟草制品中总植物碱的连续流动法测定,改进后方法的回收收率高、重现性好。