黄河口冲淤演变仿真系统的设计与实现

利用系统动力学方法,结合动态系统建模与系统仿真方法,建立了具有河嘴形态预测、冲淤点预测、水深变化预测等功能的黄河口冲淤演变仿真系统.根据2004年的实测资料,对2005年的黄河口冲淤演变情况进行预测,预测结果与实测资料吻合较好.     

基于认知主导决策模型的陆军合同战术指挥员Agent建模策略

作战模拟系统中陆军指挥员模型建模十分重要,其决策不确定性强,功能实现复杂。针对这一问题,提出了基于认知主导决策模型的建模思想,并针对其计算机实现面临的决策者经验态势结构化描述、经验态势与当前态势自动匹配以及指挥员行为建模等重点难点问题提出了解决策略。     

软件可靠性测试用例的复用度量

针对目前基于复用的软件可靠性测试缺少对测试用例复用度量的现实问题,在构建测试用例复用模型的基础上,首先应用特征分析法求解测试用例各复用资源的权重,然后再分别计算它们在测试中的复用度,最后求解得到测试用例的平均复用度。从定量的角度解决了测试用例的复用度量问题。     

集成模糊LSA与MIL的图像分类算法

针对自然图像的分类问题,提出一种基于模糊潜在语义分析(LSA)与直推式支持向量机(TSVM)相结合的半监督多示例学习(MIL)算法.该算法将图像当作多示例包,分割区域的底层视觉特征当作包中的示例.为了将MIL问题转化成单示例问题进行求解,首先利用K-Means方法对训练包中所有的示例进行聚类,建立"视觉词汇表";然后根据"视觉字"与示例之间的距离定义模糊隶属度函数,建立模糊"词-文档"矩阵,再采用LSA方法获得多示例包(图像)的模糊潜在语义模型,并通过该模型将每个多示例包转化成单个样本;采用半监督的TSVM训练分类器,以利用未标注图像来提高分类精度.基于Corel图像库的对比实验结果表明,与传统的LSA方法相比,模糊LSA的分类准确率提高了5.6%,且性能优于其他分类方法.     

iFIX组态软件在污水处理控制系统中的应用

介绍了组态软件iFIX在污水控制系统中的应用情况,对iFIX组态软件的特点进行了简介说明以及对整个污水处理控制系统的组成进行了阐述,提出了系统进行组态过程中的两个主要技术问题,iFIX和关系数据库的通讯以及日报表的生成,并提供了解决方法,同时给出了解决报表的部分主要程序代码。     

银行卡业务创新及其对风险防范的作用

随着国内经济发展和消费需求的变化,银行卡业务也应与时俱进,寻求创新.本文首先分析银行卡业务发展的现状,然后提出今后创新的方向.在此基础上,文章从银行卡风险防范的角度分析业务创新的重要作用.     

基于合一的链接文法

以词汇主义形式语法为基础,建立了链接文法与合一理论相结合的句法分析新方法.在封闭测试中,基于合一的链接文法句法分析精确率和召回率相比传统链接文法分别提高了9.6%和14.1%.实验表明方法具有一定独创性和高效性.     

Activatable NIR-II Lanthanides-Polymetallic Oxomolybdate Hybrid Nanosensors for Monitoring Chemotherapy Induced Enteritis

Chemotherapy-induced enteritis is one of the side effects associated with cancer therapy, which significantly affects the treatment effect, but there is no effective clinical detection method that can early diagnose its occurrence and progression. Here, a series of second near-infrared window (NIR-II) hybrid nanosensors are designed that consisted of lanthanide nanoparticles and β-Mo2C-derived polymetallic oxomolybdate nanoclusters (Ln@POM). Based on the high sensitivity of POM to reactive oxygen species (ROS) closely related to chemotherapy-induced enteritis, the NIR-II luminescence intensity and lifetime of Ln@POM (Ln: Yb³⁺, Nd³⁺, Ho³⁺, Tm³⁺, Er³⁺) show excellent responsiveness to H₂O₂ and HClO with the detection limit down to 0.15 and 0.14 µm , respectively. Utilizing Nd@POM as a ROS-activated NIR-II nanosensor, the chemotherapeutic enteritis is successfully detected within 7 h after induction of chemotherapy drugs, which is significantly earlier than the gold standard method (immunohistochemistry, 24 h). These results demonstrate that the designed hybrid nanosensors are promising optical tools for the early diagnosis of ROS-related diseases.     

Light-Responsive Programmable Shape-Memory Soft Actuator Based on Liquid Crystalline Polymer/Polyurethane Network

Liquid crystalline polymers (LCPs), especially liquid crystalline elastomers (LCEs) can generate ultrahigh shape change amplitude but has lower mechanical strength. Although some attempts have been tried to improve the mechanical performance of LCE, there are still limitations including complicated fabrication and high actuation temperature. Here, a versatile method is reported to fabricate light-driven actuator by covalently cross-linking polyurethane (PU) into LCP networks (PULCN). This new scheme is distinct from the previous interpenetrating network strategy, the hydrogen bonds and covalent bonds are used in this study to improve the miscibility of non-liquid-crystalline PU and LCP materials and enhance the stability of the composite system. This material not only possesses the shape memory properties of PU but shows shape-changing behavior of LCPs. With a shrinkage ratio of 20% at the phase transition temperature, the prepared materials reached a maximum mechanical strength of 20 MPa, higher than conventional LCP. Meanwhile, the resulting film shows diverse and programmable initial shapes by constructing crosslinking density gradient across the thickness of the film. By integration of PULCN with near-infrared light-responsive polydopamine, local and sequential light control is achieved. This study may provide a new route for the fabrication of programmable and mechanically robust light-driven soft actuator.     

Proximity-Induced Fully Ferromagnetic Order with Eightfold Magnetic Anisotropy in Heavy Transition Metal Oxide CaRuO3

Ferromagnetic materials with a strong spin-orbit coupling (SOC) have attracted much attention in recent years because of their exotic properties and potential applications in energy-efficient spintronics. However, such materials are scarce in nature. Here, a proximity-induced paramagnetic to ferromagnetic transition for the heavy transition metal oxide CaRuO₃ in (001)-(LaMnO₃/CaRuO₃) superlattices is reported. Anomalous Hall effect is observed in the temperature range up to 180 K. Maximal anomalous Hall conductivity and anomalous Hall angle are as large as ∼15 Ω⁻¹ cm⁻¹ and ∼0.93%, respectively, by one to two orders of magnitude larger than those of the typical 3d ferromagnetic oxides such as La_0.67Sr_0.33MnO₃. Density functional theory calculations indicate the existence of avoid band crossings in the electronic band structure of the ferromagnetic CRO layer, which enhances Berry curvature thus strong anomalous Hall effects. Further evidences from polarized neutron reflectometry show that the CaRuO₃ layers are in a fully ferromagnetic state (∼0.8 μ_B/Ru), in sharp contrast to the proximity-induced canted antiferromagnetic state in 5d oxides SrIrO₃ and CaIrO₃ (∼0.1 μ_B/Ir). More than that, the magnetic anisotropy of the (001)-(LaMnO₃/CaRuO₃) superlattices is eightfold symmetric, showing potential applications in the technology of multistate data storage.