添加纳米SiO2粉体对Ti84Mo16合金性能优化的探索

针对"骨置换"材料的高强度、低弹性模量需求,基于粉末冶金制备工艺,对钛钼Ti84Mo16二元粉采用2 h球磨,然后在球磨粉中添加比例分别为1%、2%、5%纳米级SiO2粉后压坯成型,并在1 200℃条件下保温5 h固相烧结制备合金。研究发现,在Ti84Mo16合金中添加不同比例的SiO2后,其屈服强度提高17.92%,断裂强度提高5.8%,但合金塑性降低,弹性模量没有增加,依然与"骨置换"材料要求所匹配。     

超长多折线型土石坝变形监测分析坐标系统的建立

针对石佛寺水库大坝超长（需观测坝段20.6 km）并由多段折线坝体所构成的地形与坝形特点,研究超长多折线土石坝变形分析工程坐标系建立的理论和方法。利用自定义的中央子午线和椭球体,建立了基于WGS-84的实用水坝工程坐标系,各折线段坐标系既有联系又自成独立坐标体系,保证了各折线段坝体变形量的显示的一致性与直观性,为大坝变形自动分析系统的建立以及大坝的自动安全预警奠定了基础,该方法监测精度高,变形量显示直观一致,适合于多折线型超长坝体的自动化变形监测系统的建立。     

超稠油水平井监测技术研究与应用

为提高水平井开发能力,开展了一系列水平井监测工作,包括水平段的动用程度、井间热连通形成情况,有效指导了水平井增产措施及组合式注汽实施;利用SAGD技术提高采收率是超稠油开发的一次革命,监测技术通过对蒸汽腔形成情况、井底的流温流压进行实时跟踪,有效指导SAGD科学调控,为先导试验成功提供必要支持。     

Current Noise in HgBa2CuO4+δ High Tc Superconductor

Experimental results of current noise in magnetic fields up to 1 kG after zero field cooling and field cooling are reported in bulk HgBa₂CuO_{4+84g1g/xxlarge948.gif" alt="delta" align="BASELINE" BORDER="0">} prepared with vapor–solid reaction in a two-temperature zone reactor. Noise measurements performed in Hg-based superconductor materials are compared with previously studied superconductors, in particular, YBa₂Cu₃O_{7–84g1g/xxlarge948.gif" alt="delta" align="BASELINE" BORDER="0">}. A maximum in the noise is observed at the same resistance, approximately one order of magnitude lower than the normal state value and independently of the applied field. This result is consistent with experiments in bulk YBa₂Cu₃O_{7–84g1g/xxlarge948.gif" alt="delta" align="BASELINE" BORDER="0">} samples and with percolative model simulations of lattice junctions in which the maximum is obtained at the same value of the concentration of superconducting junctions and, thus, at the same macroscopic resistance. Maximum intensity is shown to increase with magnetic field up to 1 kG, with noise values slightly higher in the field cooling procedure. Our results attest that weak-link effects, as in YBa₂Cu₃O_{7–84g1g/xxlarge948.gif" alt="delta" align="BASELINE" BORDER="0">}, dominate superconducting properties of bulk HgBa₂CuO_{4+84g1g/xxlarge948.gif" alt="delta" align="BASELINE" BORDER="0">}. With respect to YBa₂Cu₃O_{7–84g1g/xxlarge948.gif" alt="delta" align="BASELINE" BORDER="0">}, no saturation at high magnetic field in both noise and magnetoresistance measurements is observed.     

基于PIC16F84单片机的IC卡智能水表设计

本文介绍了一种基于低功耗芯片PIC16F84的IC卡智能水表的设计,文中给出了系统的硬件设计和软件设计。该IC卡水表具有低成本、低功耗、可靠性高等优点,可广泛应用于各城市供水系统。     

量子LDPC码在BB84协议中的应用研究

针对BB84量子密钥分配协议中量子信道存在噪声,设计一种带有量子纠错码的改进的BB84协议模型,在模型中用量子低密度奇偶校验码（量子LDPC）作为纠错码对发送量子态进行编码。通过数值仿真,从密钥传输效率的角度分析量子纠错编码对BB84协议的影响。结果表明量子LDPC码能克服噪声,提高了密钥传输效率,验证了在含噪量子信道中改进的BB84协议模型的有效性。     

辽河油田曙一区杜84块兴隆台油层储层非均质性

兴隆台油层储层微观非均质性以上、下层系的成分与结构差异明显为特点,上层系岩石相组合以不含砾砂岩为主,主要为长石岩屑砂岩;下层系岩石相组合以含砾砂岩为主,主要为岩屑砂岩,较上层系分选性差、颗粒粗。宏观非均质性以储层砂体发育不均及物性变化大为特点。垂向上,上层系单砂层厚度小、砂层频率高、砂岩密度小;下层系单砂层厚度大、砂层频率低、砂岩密度大。平面上,上层系分东、西两个砂体,且东砂体相对发育,向上逐渐连为一体;下层系砂体分布开阔,但向上面积逐渐缩小,且东厚西薄。上层系的储层物性较下层系好。层间、层内及平面非均质性明显,且层间非均质性较层内非均质性强,层内非均质性自下而上逐渐增强。引起储层非均质性的主要原因是沉积环境和构造环境。     

基于自然人机交互的居家智能椅健康促进系统设计

目的 将家居环境中的椅子作为交互媒介,以开发一种更自然、更适应居家环境的健康促进系统,从而减少生活中的慢性压力对人们造成的生理和心理健康负担。方法 通过用户“坐”的行为活动来表征其在居家环境中的身心健康状态,结合数字化辅助正念,对智能椅的自然交互方式进行实证研究。结果 提出将椅子同时作为输入和反馈的自然人机交互界面,利用用户的身体触觉与呼吸的自然动态映射关系,通过椅子背部气囊大小的变化来引导用户进行正念深呼吸活动。结论 通过对用户焦虑和放松等不同情绪状态下的客观生理信号进行采集并结合用户主观报告量表,可以证明该系统的有效性与可用性。该系统不仅可以有效减少压力并提升用户使用时的情感体验,还可通过“坐”的时长和姿态等指标来反映用户的行为状态。此外,该系统也对人的心理与生理健康的发展起到良好的促进作用,为相关设计提供了参考。     

Comparison of GRCop-84 to Other Cu Alloys with High Thermal Conductivities

The mechanical properties of six highly conductive copper alloys, GRCop-84, AMZIRC, GlidCop Al-15, Cu-1Cr-0.1Zr, Cu-0.9Cr, and NARloy-Z were compared. Tests were done on as-received hard drawn material, and after a heat treatment designed to simulate a brazing operation at 935 °C. In the as-received condition AMZIRC, GlidCop Al-15, Cu-1Cr-0.1Zr, and Cu-0.9Cr had excellent strengths at temperatures below 500 °C. However, the brazing heat treatment substantially decreased the mechanical properties of AMZIRC, Cu-1Cr-0.1Zr, Cu-0.9Cr, and NARloy-Z. The properties of GlidCop Al-15 and GRCop-84 were not significantly affected by the heat treatment. Thus there appear to be advantages to GRCop-84 over AMZIRC, Cu-1Cr-0.1Zr, Cu-0.9Cr, and NARloy-Z if use or processing temperatures greater than 500 °C are expected. Ductility was the lowest in GlidCop Al-15 and Cu-0.9Cr; reduction in area was particularly low in GlidCop Al-15 above 500 °C, and as-received Cu-0.9Cr was brittle between 500 and 650 °C. Tensile creep tests were done at 500 and 650 °C; the creep properties of GRCop-84 were superior to those of brazed AMZIRC, Cu-1Cr-0.1Zr, Cu-0.9Cr, and NARloy-Z. In the brazed condition, GRCop-84 was superior to the other alloys due to its greater strength and creep resistance (compared to AMZIRC, Cu-1Cr-0.1Zr, Cu-0.9Cr, and NARloy-Z) and ductility (compared to GlidCop Al-15).     

杜84断块区超稠油蒸汽吞吐生产特征研究

方法　根据杜 84块的地质条件、油品性质和实际生产情况 ,应用干扰剔除和归纳统计方法 ,进行超稠油单井蒸汽吞吐生产特征研究。目的　通过对超稠油单井蒸汽吞吐生产特征研究 ,认识该区块生产规律 ,进一步指导油田下一步开发。结果　超稠油井生产具有周期生产时间短、产油量低、油汽比低、产量递减快等特点 ,开发过程具有明显的阶段性。影响生产效果的主要因素有地质条件、注汽参数等。结论　超稠油油井生产对温度敏感性强 ,后续开采方式不适合转为蒸汽驱 ,应从提高油藏平面和纵向动用程度的角度 ,开展分注、选注、井组蒸汽吞吐、调剖、层间调整、层系调整和层系互换等措施。