金山岭长城矿水床的成因

从地质、水文地质条件、矿泉水化学成分各方面探讨了金山岭长城矿水床的成因。从矿泉水的氢氧同位素H²、O¹³和H³的含量,揭示了矿水床的补给水源、补给时期、补给高程和补给位置。矿泉水的主要化学成分验证了矿水床的蓄水构造和深循环条件。     

Recent progress in organic hole-transporting materials with 4-anisylamino-based end caps for efficient perovskite solar cells

Perovskite solar cells(PVSCs) have emerged as a promising photovoltaic technology and have attracted wide research interest due to their outstanding photovoltaic performance, low cost, and the ability to fabricate largearea devices. An impressive certified power conversion efficiency(PCE) of 25.2% has been achieved, demonstrating the excellent potential of PVSCs for future applications. Hole-transporting materials play a key role in improving the device performance of PVSCs by facilitating the extraction of photogenerated holes and their transport from the perovskite layer to the anode. This review provides a brief introduction to PVSCs and summarizes the recent progress in small molecule hole-transporting materials(SM-HTMs) bearing various cores and different4-anisylamino-based end caps. We classify the end caps into N,N-di-4-anisylamino(DAA), 4-(N,N-di-4-anisylamino)benzo(DAB), and N3, N6(or N2, N7)-bis(di-4-anisylamino)-9 H-carbazole(3,6-DAC or 2,7-DAC) groups.We also review the core type, end cap position and number,how these affect the overall properties of the SM-HTMs,and the resultant PVSC device performances. Finally, the challenges and perspectives for the future development of SM-HTMs are presented.     

Knowledge-Guided Data-Driven Model With Transfer Concept for Battery Calendar Ageing Trajectory Prediction

<正>Dear Editor, Lithium-ion(Li-ion) battery has become a promising source to supply and absorb energy/power for many energy-transportation applications. However, Li-ion battery capacity would inevitably degrade over time, making its related ageing prediction necessary.     

复方木鸡颗粒对人肝癌细胞SMMC-7721细胞周期和细胞凋亡的影响

利用网络药理学和生物信息学方法揭示复方木鸡颗粒治疗肝癌的作用机制。通过TCMSP、Swiss Target Prediction数据库分别获取复方木鸡颗粒的活性成分以及相关靶点;在GEO数据库筛选肝癌的相关靶点;利用Venny 2.1在线平台获取药物与疾病的共同靶点;由Cytoscape 3.8.2绘制药物–成分–靶点–疾病网络;用STRING数据库构建PPI网络;通过DAVID数据库进行GO功能富集和KEGG通路富集分析;利用Kaplan Meier-Plotter数据库对关键基因的表达量及预后关联性进行分析;运用AutoDock软件对关键成分和靶点进行分子对接验证。复方木鸡颗粒中共获得37个活性成分,筛选出57个共有靶点,涉及生物过程98条、细胞成分17条、分子功能37条,介导15条信号通路。生存期分析结果显示,ESR1、CYP3A4、G6PD基因的表达量与肝癌患者的生存期具有相关性。分子对接表明筛选的6个活性成分与6个关键靶点蛋白之间具有较好的结合能力。复方木鸡颗粒中的大豆皂苷C、柚皮素、β-谷固醇、汉黄芩素等活性成分可以作用于ESR1、CYP3A4、G6PD等靶点,可能通过P53、戊糖磷酸途径、MAPK等信号通路发挥治疗肝癌的作用。

     

防御链接预测攻击的隐私保护方法

为解决现有的防御链接预测攻击的隐私保护方法的不足,提出一种基于积分梯度的局部扰动算法LDIG (local disturbance algorithm based on integral gradient)。利用敏感链接的闭合子图确定扰动范围,根据扰动范围内链接的积分梯度迭代扰动链接,同时将链接预测对扰动图中敏感链接的预测结果作为扰动结束的判断依据。实验结果表明,LDIG算法的计算复杂度较低,适用于大规模社交网络的隐私保护,扰动链接的数量较少,提高了数据的效用性。     

Depth-Guided Vision Transformer With Normalizing Flows for Monocular 3D Object Detection

Monocular 3D object detection is challenging due to the lack of accurate depth information. Some methods estimate the pixel-wise depth maps from off-the-shelf depth estimators and then use them as an additional input to augment the RGB images.Depth-based methods attempt to convert estimated depth maps to pseudo-LiDAR and then use LiDAR-based object detectors or focus on the perspective of image and depth fusion learning.However, they demonstrate limited performance and efficiency as a result of ...     

SCR-DDC双闭环系统数字仿真

在进行计算机控制系统的设计时,如若系统中有不同的采样周期,那么将很难利用离散系统稳定性判别方法——Z平面上极点的分布来判断系统的稳定性,此时利用数字仿真来研究其稳定性是一种重要的手段。本文主要是以实际的SCR-DDC转速、电流双闭环系统为对象,分析其系统模型,选择数字仿真的方法,最后给出仿真系统的运行结果。     

模糊聚类分析法在炼钢中的应用

尝试用模糊聚类分析法处理氧气转炉复吹工艺试验数据,证明底部供气强度对炉渣氧化性及脱磷、脱硫能力有不容忽视的影响,并得到它们之间的定性关系。     

皮肤光损伤与氧化应激研究进展

以药食同源中药材人参为原材料,通过超声辅助热水法提取人参多糖（Ginseng polysaccharides,GPS）,经酶解法去除淀粉和蛋白质,再经DEAE-52纤维素柱层析分离纯化得到精制人参多糖（GPS-1）。通过高效凝胶渗透色谱、红外光谱和核磁共振波谱测定了GPS-1的相对分子质量、单糖构成和结构特征,另外研究了GPS-1对人皮肤成纤维细胞（Human skin fibroblasts,HFF-1）存活率和HFF-1中活性氧（Reactive oxygen,ROS）、丙二醛（Malondialdehyde,MDA）、谷胱甘肽过氧化物酶（Glutathion peroxidase,GSH-Px）、超氧化物歧化酶（Superoxide dismutase,SOD）、金属蛋白酶1（Metalloproteinase 1,MMP-1）和金属蛋白酶9（Metalloproteinase 9,MMP-9）的影响。结果表明,GPS-1为均一性多糖,多糖纯度为95.13%,重均分子量为2.104 kDa,由α-D-葡萄糖、α-D-半乳糖醛酸、α-D-阿拉伯糖、α-D-岩藻糖、α-D-核糖、β-D-甘露糖和β-D-阿拉伯糖构成。GPS-1可保护UVB照射下的HFF-1细胞活性,质量浓度为200 μg/mL的GPS-1溶液即可显著抑制MMP-1和MMP-9的表达（P<0.01）,显著提升SOD和GSH-Px的含量（P<0.01）,显著降低ROS和MDA的含量（P<0.01）,为人参多糖的分离纯化以及在开发抗衰老产品的应用提供了科学依据。     

自动控制理论实验仪测试软件的实现

基于虚拟仪器技术,开发了自动控制理论实验仪,更新了自动控制理论课程的实验手段,有效地提高了实验效率,增强了教学效果。该文论述实验仪测试软件的设计,包括其体系结构、主要内容、特点。