简介：TherelationbetweenthewallpaintingsofDra-thangMonasteryandDunhuangartisrathercomplex.Inordertohaveabetterunderstandingofit,twofac-etsneedtobeclarified:oneisthatthewallpaintingsofDra-thangMonasteryareakindofcontinuationofTibetan-stylepaintingsduringtheTubo'soccupationperiod(786-848A.D),thatis,theirdatesaredifferentbuttheyareofthesameessence.Theotheristhatbothofthemsharesimilarculturalelements.Theyarerelatedbutdifferfromeachother.Theirmultiplelinks

简介：近期“DRA音频编码解码技术”这一名词频现于各种报道．那么这种音频技术到底有何过人之处，为何近期备受关注？它跟我们日常接触的MP3、AAC等音频编码解码技术。又有什么差异？

简介：瑞典：Sōdra公司已经对针叶锯材市场销售疲软的情况做出反应，8月底削减其在拉姆克维拉（Ramkvilla）、图绍斯市（Torsas）和Langasjō工厂的生产量总计约5万～6万m^3。第1步，在拉姆克维拉和图绍斯市节日期间约4个星期的停产时间将多延长2个月。这2家工厂将于6月4日停止锯切加工，8月27日恢复。

简介：AbstractBackground:Low-grade gliomas (LGG) are WHO grade II tumors presenting as the most common primary malignant brain tumors in adults. Currently, LGG treatment involves either or a combination of surgery, radiation therapy, and chemotherapy. Despite the knowledge of constitutive genetic risk factors contributing to gliomas, the role of single genes as diagnostic and prognostic biomarkers is limited. The aim of the current study is to discover the predictive and prognostic genetic markers for LGG.Methods:Transcriptome data and clinical data were obtained from The Cancer Genome Atlas (TCGA) database. We first performed the tumor microenvironment (TME) survival analysis using the Kaplan-Meier method. An analysis was undertaken to screen for differentially expressed genes. The function of these genes was studied by Gene Ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis. Following which a protein-protein interaction network (PPI) was constructed and visualized. Univariate and multivariate COX analyses were performed to obtain the probable prognostic genes. The key genes were selected by an intersection of core and prognostic genes. A clinical correlation analysis of single-gene expression was undertaken. GSEA enrichment analysis was performed to identify the function of key genes. Finally, a single gene-related correlation analysis was performed to identify the core immune cells involved in the development of LGG.Results:A total of 529 transcriptome data and 515 clinical samples were obtained from the TCGA. Immune cells and stromal cells were found to be significantly increased in the LGG microenvironment. The top five core genes intersected with the top 38 prognostically relevant genes and two key genes were identified. Our analysis revealed that a high expression of HLA-DRA was associated with a poor prognosis of LGG. Correlation analysis of immune cells showed that HLA-DRA expression level was related to immune infiltration, positively related to macrophage M1 phenotype, and negatively related to activation of NK cells.Conclusions:HLA-DRA may be an independent prognostic indicator and an important biomarker for diagnosing and predicting survival in LGG patients. It may also be associated with the immune infiltration phenotype in LGG.

简介：新版冷冻机油产品标准(GB/T16630-2012)对制冷系统用油提出了更高的要求。产品升级后的昆仑L-DRA68产品在兰州石化的约克制冷机组中(氨冷媒)开展了为期8000h的使用性能测试试验。油品的氧化安定性、耐氨性能、酸值、元素分析、戊烷不溶物等定期监测数据表明:在试验拟定的换油周期内,昆仑L-DRA68产品完全满足制冷设备的用油要求。

简介：本文主要介绍广东省在河源地区构建一个由三个发射点组成的国标地面数字电视单频网，并在该单频网上开展AVS+和DRA技术标准的应用示范，分析了AVS+和DRA技术的使用及前景。