一种新型DLLT-B双侧向探头的研制

新研制出的一种完全可拆卸维护、平衡活塞式的DLLT-B双侧向电极系探头。文章阐述了它的设计过程、结构特点及性能指标,并通过测井实验和投产使用,证明了仪器的可靠性及可推广性。     

输电线路全过程机械化施工评价分析及工程应用

全过程机械化施工是国家电网工程建设的重点发展方向,旨在提高电力线路工程建设的安全质量和效率效益。对电力线路进行全过程机械化施工可行性分析及优化分析,评价工程各个因素对机械化施工的影响和限制条件,提出较为完整的电力线路机械化施工评价分析方法和原则,对关键施工机械的研发提出进一步规划和要求。同时,介绍了全过程机械化施工在某电网初步方案设计中的实际应用,为实际工程应用提供具体指导意见。     

Preparation and characterization of CuO nanowire arrays

d to characterize the nanowire morphologies. Raman spectra were performed to study the CuO nanowire arrays. After measuring, we found that the current-voltage curve of the CuO nanowires is nonlinear.     

电射流法沉积的ZrO2织构化表面及其摩擦磨损特性∗

精密器械中的微摩擦零件的增摩需求逐渐被重视,电射流沉积法可以低成本制备出增摩表面。 利用溶胶凝胶法制作 ZrO₂ 溶液,通过电射流沉积技术结合掩膜板在 316L 不锈钢表面制备具有仿生图案的二氧化锆(ZrO₂ )织构化表面,测试织构化表面的亲水性和不同加载力下的摩擦磨损性能,并与相同试验条件下的光滑基体、薄膜作对比。 结果表明:利用电射流沉积技术通过掩膜板制备织构化增摩表面的方法简单可行,织构化表面与基体和薄膜相比亲水性更弱,与光滑基体相比在小加载力下其摩擦因数增加约 70%,磨损率下降约 50%,有明显的增摩、耐磨效果。 电射流法借助掩膜板沉积的 ZrO₂ 织构化表面可为微摩擦零件表面的增摩耐磨提供一种新方式。     

Dependence of Crystallization Behavior on Particle Size in Barium Strontium Titanate Glass‐Ceramics

Differential thermal analysis studies on the crystallization kinetics and phase developments of barium strontium titanate glass‐ceramics have been performed for a series of glass particles with different particle sizes. The crystallization behavior was deduced to be influenced strongly by the particle size of the glass samples. These studies have revealed the initial formation at lower temperatures of metastable fresnoite Ba₂TiSi₂O₈ (BTS) phase followed by its transformation at higher temperatures to feldspar BaAl₂Si₂O₈ (BAS) and perovskite (Ba,Sr)TiO₃ (BST) phases. The metastable BTS phase was proved to crystallize predominately by surface crystallization while the feldspar BAS phase showed significant evidence of internal crystallization. And for the perovskite BST phase, crystallization mechanism changes from surface to internal type at a critical particle size of 75 μm. In addition, activation energy and the Avrami parameter for crystallization have been determined for the three phases by the employment of glass samples with two typical particle sizes.     

Microstructure,Thermal Conductivity,and Electrical Properties of In Situ Pressureless Densified SiC–BN Composites

The microstructure, thermal conductivity, and electrical properties of pressureless densified SiC–BN composites prepared from in situ reaction of Si₃N₄, B₄C, and C were systematically investigated, to achieve outstanding performance as substrate materials in electronic devices. The increasing BN content (0.25–8 wt%) in the composites resulted in finer microstructure, higher electrical resistivity, and lower dielectric constant and loss, at the expense of only slight degradation of thermal conductivity. The subsequently annealed composites showed more homogeneous microstructures with less crystal defects, further enhanced thermal conductivities and electrical resistivities, and reduced dielectric constants and losses, compared with the unannealed ones. The enhanced insulating performance, the weakened interface polarization, and the reduced current conduction loss were explained by the gradual equalization of dissolved B and N contents in SiC crystals and the consequent impurity compensation effect. The schottky contact between graphite and p‐type SiC grains presumably played a critical role in the formation of grain‐boundary barriers. The annealed composites doped with 8 wt% BN exhibited considerably high electrical resistivity (4.11 × 10¹¹ Ω·cm) at 100 V/cm, low dielectric constant (16.50), and dielectric loss (0.127) at 1 MHz, good thermal conductivity [66.06 W·(m·K)^?1] and relatively high strength (343 MPa) at room temperature.     

跨小区多跳中继协作通信的无线通信能效优化 *

针对蜂窝网中某一基站处于体眠状态时引起各用户的通信中断问题,提出利用中继协作通信实现跨小区多跳通信的迭代中继选择算法.该算法是在有多个中继节点可为目的节点提供协作中继时,将源节点到目的节点的数据传输分为3个连续时隙,选择满足目的节点信噪比最大化的中继,以协作效率为依据删除协作效率最小的中继节点,从而逐次优化中继选择结果.仿真结果表明,该算法在跨小区多跳的通信过程中,能选择出协作效率最高的中继节点,减少协作中继的数量,可以减少中继对能源不必要的消耗,改善小区内中继协作效率,在多跳的过程中节省源节点的发射功率,从而达到能效优化的目的.     

V型双稳态压电发电机建模与输出特性分析

为对真实环境中宽带低频的振动能量实现有效收集,设计了一种不含磁铁的V型结构双稳态压电发电机,给出了压电发电机的机-电转换模型,并对输出特性进行了仿真分析。结果表明,初始夹角在一定范围内时,V型压电发电机发生随机共振,系统有效收集宽带低频的振动能量。该结构不含磁铁,有利于微型化和集成化。     

深层—超深层古老烃源岩滞留烃及其裂解气资源评价

我国高-过成熟海相天然气主要成因类型为原油裂解气,滞留烃是原油裂解气的重要来源,对其进行定量研究意义重大。为此,结合正演(实验模拟)和反演(地质剖面解剖)两种方法,求取了我国重点盆地不同类型、不同丰度、不同演化阶段的滞留烃量,建立了5种类型烃源岩(腐泥型、偏腐泥混合型、偏腐殖混合型、腐殖型、煤型)的滞留烃演化模型。结果表明:腐泥型、偏腐泥混合型优质烃源岩在低成熟阶段的排烃效率低于20%,在主生油阶段的排烃效率介于20%~50%,在高成熟阶段的排烃效率介于50%~80%,而相应阶段偏腐殖混合型和腐殖型烃源岩的排烃效率则要低约10%。基于该演化模型,初步计算了四川盆地海相烃源岩中高成熟阶段-现今滞留烃资源分布和裂解排气量:该盆地下寒武统筇竹寺组滞留烃在高演化阶段裂解排出的气态烃总量达230.4×10~(12)m~3,震旦系陡山沱组烃源岩滞留烃裂解气的排出量为12.3×10~(12)m~3,均显示出很好的天然气成藏潜力;进而指出,四川盆地筇竹寺组烃源岩滞留烃裂解气的有利区主要包括高石梯-磨溪、资阳、威远地区,有利分布面积达4.3×10~4 km~2。     

Study of Pre-Treatment of Oil Refinery Wastewater by EEF-Enhanced Micro-Electrolysis

Oil refinery wastewater is rich in organic pollutants and cannot be treated easily. This study involves the pre-treatment of oil refinery wastewater by external electric field (EEF)-enhanced micro-electrolysis technology. The anode was titanium net plated with ruthenium, the cathode was barbed wire, and the Fe/C/Al micro-electrolysis filler as particle electrode. The optimum conditions for EEF-enhanced micro-electrolysis were determined to be as initial pH of 3.0, 10 V EEF voltage, and 0.06 mol/L electrolyte concentrations by studying the influence of different experimental parameters. It was also found that EEF-enhanced micro-electrolysis had a higher efficiency than the traditional micro-electrolysis in the degradation of the organic pollutants present in the oil refinery wastewater. Continuous running results showed the removal rate of COD (chemical oxygen demand), ammonia nitrogen and oil of the effluent was stable, and the average value of the effluent B/C (biochemical oxygen demand/chemical oxygen demand) ratio was 0.454 ± 0.013. The values of EC (energy consumption) and ICE (instantaneous current efficiency) were 9.8 kWh/Kg COD and 340.5%, respectively, when the reaction time was 60 min in oil refinery wastewater pre-treatment by EEF-enhanced micro-electrolysis technology. GC/MS was used to analyze the organic compounds present in the wastewater before and after treatment. UV-visible absorption spectroscopy was used to analyze the degradation process of the organic compounds present in the oil refinery wastewater. The results of these analyses confirmed the technical feasibility of EEF-enhanced micro-electrolysis in the pre-treatment of the oil refining wastewater. Finally, the main mechanism involved in the treatment of refinery wastewater by EEF-enhanced micro-electrolysis technology has been discussed.