东风大坝垂线基准值拟合

以东风大坝垂线改造为例，阐述了通过统计模型分析来确定改造后垂线新系统基准值的方法。基准值拟合后的数据分析表明，连接后的测值序列可满足分析需要，保证了测值的长期连续性。     

Optimization of Plasma Etching Parameters and Mask for Silica Optical Waveguides

Optical waveguides in silica-on-silicon are one of the key elements in optical communications.The processes of deep etching silica waveguides using resist and metal masks in RIE plasma are investigated.The etching responses,including etching rate and selectivity as functions of variation of parameters,are modeled with a 3D neural network.A novel resist/metal combined mask that can overcome the single-layer masks’ limitations is developed for enhancing the waveguides deep etching and low-loss optical waveguides are fabricated at last.     

用改进的演化算法进行地下管线资料解释

在地下管线探测资料的解释中常遇到３种复杂的情况，即管线密集平行或上下重叠的情况、管线敷设在斜坡地形下的情况和用磁偶极子示踪法探测非金属管线但不能保证磁偶极子是否水平或垂直的情况。用常规解释方法处理这些复杂情况得不到满意的结果，甚至会误判。改进的演化算法是一种搜索效率很高的算法，不仅有杂交算子，而且还引入了变异算子，每一代只淘汰最差的个体。将该算法用于直接反演上述３种复杂情况下管线的参数，取得了很好的效果。     

工程教育认证背景下结构力学“金课”设计研究

本文基于工程教育理念,针对结构力学课程特点,分析了结构力学课程对土木工程专业毕业要求的支撑作用,按照“金课”标准对结构力学教学思路进行设计。以力法求解超静定结构的课程内容为例,采用案例教学法、启发式教学法、研讨式教学法等多种方法,从工程实例引入超静定结构,讨论力法求解的具体思路和步骤,并应用于解决郑州奥体中心体育场钢结构工程等问题,实现从解决一般工程问题到解决复杂工程问题的跨越。课程教学取得了良好成效,可为其他工科工程基础类课程教学提供参考。     

JZS油田潜山裂缝储层形成机制及分布预测

依据岩石化学指标和微观特征,JZS潜山纵向上自上而下化学风化程度相应地可划分为风化、半风化和未风化3个级别,以岩心观察、岩石薄片鉴定和成像测井等资料为基础,结合生产测井资料,认为JZS潜山由表及里也可分为风化壳、半风化壳和基岩3个带,与化学风化级别相对应;潜山储层储集空间主要为半风化壳的构造缝及风化壳的溶蚀缝;裂缝储层发育受岩性、构造运动及风化溶蚀作用等因素综合控制,主控因素是构造运动。按断裂期次及倾角大小,JZS潜山构造缝可划分为4类,即早期半充填-充填水平缝、早期半充填-充填垂直缝、晚期半充填碎裂缝和晚期开启倾斜缝应用原油包裹体检测技求确定JZS潜山主要有敏裂缝为晚期开启倾斜缝和半充填碎裂缝。通过岩心和成像测测井资料标定,建立了JZS潜山常规测井资料识别有敏裂缝的标准并重构有效裂缝识别曲线利用重构曲线,进行裂缝储层反演及分布预测。该方法预测结果与其他地球物理方法预测结果吻合较好,为开发井部署提供了地质依据。     

Design Guidelines For Conjugated Polymers With Light‐Activated Anticancer Activity

Multifunctional materials that simultaneously provide therapeutic action and image the results provide new strategies for the treatment of various diseases. Here, it is shown that water soluble conjugated polymers with a molecular design centered on the polythiophene?porphyrin dyad are effective for killing neighboring cells. Following photoexcitation, energy is efficiently transferred from the polythiophene backbone to the porphyrin units, which readily produce singlet oxygen (¹O₂) that is toxic for the cells. Due to the light‐harvesting ability of the electronically delocalized backbone and the efficient energy transfer amongst optical partners, the polythiophene?porphyrin dyad shows a higher ¹O₂ generation efficiency than a small molecule analog. The fluorescent properties of these polymers can also serve to distinguish amongst living and dead cells. Polymers can be designed with folic acid grafted onto the polymer side chain that can specifically kill folate receptor‐overexpressed cells, thereby providing an important demonstration of anticancer specificity through molecular design.     

Luminescence properties of Ca0.65La0.35F2.35:Yb, Er with enhanced red emission via upconversion

Yb³⁺/Er³⁺ codoped Ca_0.65La_0.35F_2.35 materials with intense red emission via upconversion were prepared by a high temperature solid-state method. Based on the upconversion luminescence properties investigations, it was found that, under 980 nm excitation, Ca_0.65La_0.35F_2.35:20 mol.%Yb³⁺, xEr³⁺ showed intense red upconversion luminescence, which was ascribed to ⁴F_9/2 → ⁴I_15/2 transition of Er³⁺, although both green and red emissions could be detected. It was also found that the green and red emissions originated the two photon processes, and the ground-state absorption (GSA), excited-state absorption (ESA) and energy transfer (ET) processes between Er³⁺/Yb³⁺ ions and Er³⁺/Er³ ions were involved in the enhanced red emission mechanism.     

金川三矿区低品位铜镍矿石工艺矿物学研究

通过工艺矿物学研究,查明了金川三矿区低品位铜镍矿石的矿物组成、铜镍的赋存形式及主要有用矿物的嵌布特性。研究结果表明：矿石中的铜、镍主要以镍黄铁矿、紫硫镍铁矿、黄铜矿、墨铜矿形式存在,但其他硫化矿物及脉石矿物与它们嵌布关系密切而复杂;矿石蛇纹石蚀变严重,易于泥化。这些将给铜、镍的分选带来不利影响。