黑龙江省孙吴县正阳山钼矿床地质特征及找矿标志

<正>阳山钼矿床位于兴蒙造山带东段的小兴安岭—张广才岭成矿带。矿体主要呈脉状、透镜状和不规则条带状赋存于碎裂斑状二长花岗岩中。围岩蚀变大致可分出3个较强蚀变带:强硅化、石英-钾长石化带(内带),硅化、石英-绢云母化带(中带)和泥化带(外带),青磐岩化在全区普遍发育。矿体主要赋存于蚀变内带中,其次为中带,外带中只见矿化,未见矿体。地球化学特征显示Mo-Au-Zn-Cu-Pb-Ag组合为重要的找矿标志,地球物理特征显示高极化率异常、高磁异常与化探异常浓集中心互相重叠的地段为最佳找矿部位。综合研究认为,正阳山钼矿床成因类型属于斑岩型。     

脉冲激振枪

Impulse exciting gun is a new type of impulse exciter developed by authors. When it works, the shock head in the gun impacts the object to be measured at a certain speed, so that an impulse. Force is exerted on the object in fraction of a second. At the same time, the force transaucer with the shock head converts the impulse force into electrical signal for output. Thus the impulse excition for the objects to be measured as well as dynamic measurement have been completed just once. Impulss exciting gun involves three main parts called adjusting mechanism, localizing mechanism and returning mechanism. Adjusting mechanism can easily change rigidity of impulse head and the initial velocity of impact, in order to control contact continuance (force impulse breadth) and maximal presure Fm.. (force impulse peak value) between the 'shock head and the object. The function of localizing mechanism is to control exerted force point and its direction more accuratly. And setting up a returning mechanism is to avoid touching again between the shock head and the object after they collide with each other. Outward appearance of the gun is in figure 1. As for main technique indexes of impulse exciting gun see table 1 and figue 4-3.Impulse exciting gun is not only of simple structure, but also reliable and convenient to use. Furthermore, force impulse breadth and its peak value and exerted force point and its direction may be accuratly controlled when used. Those special advantages of the gun over impulse exciters now available make it come into vise in some scientific research departments and colleges.     

江垭地下厂房支护设计与观测变形分析

运用新奥法理论,对江垭地下水电站主厂房洞室在施工过程中的围岩稳定性进行了计算;并结合原始的变形观测值作了进一步分析验证．介绍了对不稳定块体的工程处理措施．指出在工程实践中严格遵守新奥法施工原则和加强变形观测对于维护高边墙围岩稳定的重要性．     

Design of Mitoxantrone-Loaded Biomimetic Nanocarrier with Sequential Photothermal/Photodynamic/Chemotherapy Effect for Synergized Immunotherapy

Metastatic triple-negative breast cancer (TNBC) has a poor prognosis and high mortality with no effective treatment options, and immunotherapy is highly anticipated as a potential treatment but is limited by the lack of tumor-infiltrating T lymphocytes in TNBC. Herein, red blood cell (RBC) membrane-camouflaged polyphosphoester (PPE) nanoparticles (RBC@PPE_MTO/PFA) are prepared as the nanocarriers of mitoxantrone (MTO) and perfluoroalkane (PFA) for synergized immunotherapy. The encapsulated MTO can generate heat and reactive oxygen species (ROS) to achieve photothermal and photodynamic therapy; moreover, ROS further triggers the self-accelerating release of MTO from the ROS-sensitive PPE core to enable chemotherapy. The RBC@PPE_MTO/PFA-mediated sequential photothermal/photodynamic/chemotherapy efficiently promotes the infiltration of CD8⁺ T cells into TNBC tumor tissue and synergizes the therapeutic activity of an immune checkpoint blockade antibody for metastatic TNBC treatment in distant and lung metastasis models. This biomimetic nanomedicine of MTO provides a convenient and available strategy to sensitize TNBC to immune checkpoint blockade antibody.     

基于深度学习和智能在线场景匹配的配电网源网荷储无功协调优化策略

配电网源网荷储协调优化是消纳可再生能源的重要手段,其中,无功优化可保障系统安全可靠和经济运行。该文提出了一种基于深度学习和智能在线场景匹配的配电网源网荷储无功协调优化方法,它充分考虑到运行场景的特性,直接利用配网运行大数据离线生成历史场景库并基于多目标粒子群优化算法离线构建历史策略库,再基于不同优化目标和K-means聚类算法对历史场景库和实时待优化场景进行两次分类,然后以历史场景库为训练集,以实时待优化场景为测试集,基于深度神经网络实现智能在线场景匹配,通过匹配效果评估匹配历史策略或在线优化分配无功优化方案。最后,在IEEE 30节点仿真模型接入分布式光伏、储能和电动汽车充电站等随机负荷进行算例验证。结果表明,方法可灵活、有效地对系统进行协调无功优化,不依赖于模型和参数,极大地提高了决策效率。     

Breaking or keeping the habits: exploring the role of legacy habits in the process of discontinuing organisational information systems

Users develop habits in relation to information systems (IS) to reduce the cognitive and behavioural efforts needed for using them. However, when these systems have to be discontinued, users face challenges regarding how to stop relying on their legacy habits. Despite their importance, we know little about how legacy habits shape the way users discontinue a legacy system. Through a comparative case-study approach, in a large mortgage firm and an international telecommunication company, we identify three roles that these habits play during the discontinuance process. We demonstrate that legacy habits not only play an ‘inhibiting’ role by keeping users attached to legacy systems; they also play a ‘bridging’ role by acting as a common ground for users to start working with a new system and a ‘deterring’ role when users resent certain habits of working with the legacy systems, despite their orientation to keep relying on these habits. We contribute to the IS habit literature by extending the roles of legacy habits beyond an inhibiting role. We also enrich the conceptualisation of legacy habits beyond the individual level by showing that the socio-technical conditions in which the habits are embedded impact the emergence and evolution of their roles during the discontinuance process. We discuss the implications of our findings for theorising and managing IS discontinuance process.     

抑郁症网络社交与疑似抑郁微博初步筛选算法

在社交网络数据与抑郁症有关研究中往往需要采取人工方式标注抑郁症和非抑郁症用户,费时费力。通过高校大学生的微博社交数据的采集与分析,研究并提出了一种基于抑郁关键词与语义扩展的大学生疑似抑郁微博初步筛选算法——综合词法。该方法通过基础关键词表的构建和基于词嵌入学习模型WORD2VEC的语义扩展形成抑郁关键词表,最后利用该词表对被测微博进行语义相似度计算,进而识别其是否为疑似抑郁微博。在首都高校大学生微博数据集上的实验结果表明：综合词法在筛选准确率上优于SDS问卷分词法和专家词法;综合词法能够快速地从海量大学生微博中自动筛选占比非常少的疑似抑郁微博,减少专家标注工作量,提高标注效率,并可进一步为后续抑郁症患者精确识别（分类问题）提供良好的数据处理基础。     

求解有限缓冲区流水线调度问题的混合蝙蝠算法

针对最小化最大完成时间的有限缓冲区流水线调度问题(LBPFSP),提出一种混合蝙蝠算法(HBA)。在算法设计中,采用基于SPV的编码规则以实现连续的实数向离散的作业序列的转变,在种群初始化时引入NEH启发式算法,为提高算法的搜索效率,以一定的概率执行基于Pairwise的邻域搜索。对标准测试问题在不同缓冲区下的最优值进行仿真并与其他算法进行对比,并对基于Pairwise的邻域搜索的执行概率值对算法性能的影响进行讨论,其结果验证了HBA求解LBPFSP的有效性。     

巨型水电站厂房振动预测研究

国内外已建成的大型水电站的厂房振动问题严重影响电站的经济效益和电力调峰.目前我国许多即将建成或开工建设的巨型水电站的机组出力和厂房尺寸不断增大,如何准确预测巨型电站厂房结构的振动问题,成为工程建设的关键问题之一.针对三峡电站,利用有限元方法和水轮机模型试验,提出构造水轮机流道内脉动压力场的线性插值方法,并基于通用有限元程序开发了相应程序,预测三峡电站厂房在设计水头下的振动响应.为了检验计算模型和预测方法,针对目前设计水位开展了现场振动测试.测试结果表明,厂房实际振动响应的主频、最大值位置和分布规律上与计算结果基本一致,实际振动幅值比计算结果偏小,这说明计算模型基本合理,预测方法基本可行.