借信息化之力构建数字化采油厂

以信息化带动工业化,以工业化促进信息化,依靠信息化的推动力量,通过信息化加快石油工业发展,真正实现“数字化”采油厂。“数字化”采油厂就是利用现代信息技术实现采油厂管辖范围内源头数据齐全、准确地采集,通过网络（有线和无线）传输到采油厂数据中心进行规范化地入库和管理,并实现安全授权共享。建设“数字化”采油厂,不仅是采油厂实现可持续发展、增强企业核心竞争力的有效手段,也是采油厂适应外部环境变化、参与国际市场竞争的必然选择。     

应用信息管理优化技术提高用电管理水平

介绍利用用电管理优化技术,研制一套集数据采集标准化、管理信息规范化、业务流程一体化的用电管理信息系统,实现采油厂电网的高效、科学运行。     

运用信息技术实现作业方案优化设计与网上运行

紧紧围绕油田信息化建设的总体目标,从采油厂信息工作实际出发,坚持以应用为导向,不断提高信息技术的应用幅面和深度,从而提升生产管理水平。利用信息技术成功开发了油水并作业方案优化设计与网上运行系统。该系统是一套辅助措施方案设计和网上审批、流转的油田开发专业应用软件。系统贯穿措施方案发起、审批、调度流转、作业施工、效果跟踪整个过程,为该项业务提供了完整的解决方案。     

High volumetric hydrogen density phases of magnesium borohydride at high-pressure: A first-principles study

The previously proposed theoretical and experimental structures,bond characterization,and compressibility of Mg(BH 4) 2 in a pressure range from 0 to 10 GPa are studied by ab initio density-functional calculations.It is found that the ambient pressure phases of meta-stable I4 1 /amd and unstable P-3m1 proposed recently are extra stable and cannot decompose under high pressure.Enthalpy calculation indicates that the ground state of F 222 structure proposed by Zhou et al.[2009 Phys.Rev.B 79 212102] will transfer to I4 1 /amd at 0.7 GPa,and then to a P-3m1 structure at 6.3 GPa.The experimental P 6 1 22 structure(α-phase) transfers to I4 1 /amd at 1.2 GPa.Furthermore,both I4 1 /amd and P-3m1 can exist as high volumetric hydrogen density phases at low pressure.Their theoretical volumetric hydrogen densities reach 146.351 g H 2 /L and 134.028 g H 2 /L at ambient pressure,respectively.The calculated phonon dispersion curve shows that the I4 1 /amd phase is dynamically stable in a pressure range from 0 to 4 GPa and the P-3m1 phase is stable at pressures higher than 1 GPa.So the I4 1 /amd phase may be synthesized under high pressure and retained to ambient pressure.Energy band structures show that they are both always ionic crystalline and insulating with a band-gap of about 5 eV in this pressure range.In addition,they each have an anisotropic compressibility.The c axis of these structures is easy to compress.Especially,the c axis and volume of P-3m1 phase are extraordinarily compressible,showing that compression along the c axis can increase the volumetric hydrogen content for both I4 1 /amd and P-3m1 structures.     

Structural stability and electrical properties of AIB2-type MnB2 under high pressureStructural stability and electrical properties of AIB2-type MnB2 under high pressureStructural stability and electrical properties of AIB2-type MnB2 under high pressureStructural stability and electrical properties of AIB2-type MnB2 under high pressure

The structural stability and electrical properties of A1B2-type MnB2 were studied based on high pressure angle- dispersive x-ray diffraction, in situ electrical resistivity measured in a diamond anvil cell （DAC） and first-principles calcu- lations under high pressure. The x-ray diffraction results show that the structure of A1B2-type MnB2 remains stable up to 42.6 GPa. From the equation of state of MnB2, we obtained a bulk modulus value of 169.9~3.7 GPa with a fixed pressure derivative of 4, which indicates that A1B2-type MnB2 is a hard and incompressible material. The electrical resistance un- dergoes a transition at about 19.3 GPa, which can be explained by a transition of manganese 3d electrons from localization to delocalization under high pressure.     

大动态PCM/FM信号的载波频率同步

针对大动态脉冲编码-频率调制(PCM/FM)遥测信号的载波频率同步,提出了基于快速傅里叶变换(FFT)及频谱重心的载波频率估计方法,并采用了频谱叠加及频谱截取的优化方法提高算法估计精度.相对于其他基于FFT的频率估计算法,频谱重心法有着更高的估计精度及更好的抗噪声性能,而且复杂度代价很小.仿真的均方误差结果表明,基于FFT长度为2048和2块叠加以及保留信号99.9%能量的频谱截取方案有最好的估计性能.在最大多普勒频率、多普勒一阶变化率及二阶变化率分别为0.5倍、0.3倍及0.2倍符号率的大动态条件下,基于频谱重心法的二阶锁频环能够较好地完成载波频率跟踪.误码率曲线表明,经过频偏校正后的多符号非相干解调(MSD)性能与无频偏情况相比,无性能损失.     

基于多核手机芯片的TD-SCDMA非信令模式下行同步方案

随着TD-SCDMA无线通信系统商用的成熟,研究多核手机芯片的非信令模式符合终端测试发展需求。通过对TD-SCDMA下行同步过程的研究,设计了快速的非信令模式下行同步实现方案,同时结合多核手机芯片的特点充分优化下行同步过程的实现。实现结果表明,该下行同步方案处理时延40 μs左右,频偏估计结果的均值和标准差分别稳定在10 Hz、32 Hz左右,能够用于简化多核终端生产测试过程,具有一定的工程应用价值。     

GSM/SMS短信息技术在石油生产办公中应用

本文论述了GSM／SMS短信息技术在石油生产办公自动化中的设计与实施方案,对系统的功能与应用、技术特点、应用前景等方面进行了详细的讨论。