葵花岛油田储层流体识别方法研究

针对葵花岛油田在盐水泥浆条件下准确识别储层流体存在一定的难度,为了不断提高该油田储层流体识别的符合率,本文充分利用该油田比较丰富的试油投产资料及3700测井资料,开展了该油田储层流体识别方法研究,建立了该油田油气水层及气层识别图版,同时应用模糊逻辑方法建立了葵花岛油田模糊逻辑储层流体识别模型,并应用该模型对该油田内各井进行储层流体识别,最后结合上述图版及模糊逻辑储层流体识别成果,综合划分了该油田各井的有效厚度,重新计算了原油天然气地质储量,圆满完成了葵花岛油田的储量套改工作。     

多模光纤束斑纹场及其应用

本文研究了Ｈｅ－Ｎｅ激光照明多模光纤束产生的斑纹场特性，讨论了不同芯径光纤组成的多模光纤束产生的斑纹场之间的差别，并与毛玻璃斑纹场进行了比较，表明多模光纤束辐射的斑纹场可用于光学测量和信息处理。     

2015—2021年内蒙古地区市售蔬菜中禁限用农药残留调查分析

目的 了解内蒙古地区市售蔬菜中禁限用农药残留状况,为有关部门制定针对性强的、有效的禁限用农药监管防治对策提供科学依据。方法 2015—2021年,在内蒙古地区12个盟市采集市售蔬菜,采用气相色谱-质谱联用法、液相色谱-质谱联用法对蔬菜中禁限用农药残留进行检测,检测结果按照《食品安全国家标准 食品中农药最大残留限量》（GB 2763—2021）中规定的限量值来判定。结果 共采集市售蔬菜样本1 721份,监测禁限用农药20种,包括氨基甲酸酯类、有机磷类及有机氯类农药,20种禁限用农药的总检出率为9.24%（159/1 721）,总超标率为5.35%（92/1 721）。在20种禁限用农药中,除丁硫克百威、灭多威、涕灭威、氯唑磷未检出外,其他16种农药均有检出,检出率最高的是久效磷,为4.64%（21/453）。超标率最高的是乐果,为2.50%（24/959）。叶菜类蔬菜中禁限用农药检出率和超标率均为最高,分别为12.11%（77/636）和8.18%（52/636）。结论 内蒙古地区市售蔬菜检出多种禁限用农药,建议相关部门加强禁限用农药的监管,保障人民群众舌尖上的安全。     

The Dynamic Behavioral Model of RF Power Amplifiers With the Modified ANFIS

The adaptive neuro-fuzzy inference system (ANFIS) has been widely used for modeling different kinds of nonlinear systems including RF power amplifiers (PAs). The modified ANFIS (MANFIS) architecture is simpler than that of ANFIS, but with nearly the same performance for modeling nonlinear systems. In this paper, the MANFIS is applied to model RF PAs with memory effects. The simulation and experimental results both in the time and frequency domains show that this model has good modeling accuracy and the characteristics of faster convergence and lower computational complexity compared with the ANFIS model. The normalized mean squared errors of the MANFIS model are slightly lower than those of some other neural network models such as the real-valued time delay neural network, radial basis-function neural network, etc. Finally, the MANFIS model is successfully used in a digital predistortion system, which can provide over 10- dB adjacent channel leakage ratio improvement for three-carrier wideband code division multiple access signals.     

Alternating phenylenevinylene copolymers with dithienbenzothiadiazole moieties: Synthesis,photophysical, and photovoltaic properties

Two new soluble alternating phenylenevinylene copolymers S and L which contained dithienbenzothiadiazole moieties were synthesized by Heck coupling. The repeating unit of L was longer than that of S and contained two additional phenylene rings and two cyano‐vinylene bonds. Both copolymers were stable up to about 350°C and afforded char yield of 52–66% at 800°C in N₂. Their absorption spectra were broad and extended up to about 600 nm with a longer wavelength maximum at 447–502 nm and optical band gap of ～ 2.0 eV. These copolymers emitted yellow light in solution with PL maximum at 551–580 nm and orange‐red light in thin film with PL maximum at 588–661 nm. The emission maximum of L was considerably red‐shifted relative to S . Photovoltaic cells based on S (or L ) as donor and [6,6]‐phenyl C61‐butyric acid methyl ester as acceptor were investigated. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

毛细管供热饰板材热工性能及其设计选择方法研究

介绍了毛细管供热饰板材的选材及样本的结构尺寸,结合实验数据分析了毛细管供热饰板材的热工性能,给出了毛细管供热饰板材的散热量计算公式及设计选择方法.     

台阶式溢流坝后消力池压强特性

本文通过物理模型试验,研究了台阶式溢流坝在3种坡度下消力池底板上的时均压强、峰值动水压强、脉动压强强度及其形成的特点,提出了计算时均压强的经验公式。研究表明,时均压强、峰值动水压强和脉动压强强度最大值出现在水流冲击消力池底板处,位于x/hk=1.2～2.5,其值随泄槽坡度和流量增加而增大,时均压强的yp/hk最大可达5.4,脉动压强强度可达其相应时均压强的80%,峰值动水压强与时均值的比值可达5～8倍。压强最小值位于x/hk=2.5～5.1之间,时均压强偶会出现负值。脉动压强优势频率在冲击区为4Hz～8Hz,水跃区2Hz～5Hz,跃后区一般在2Hz以下。     

广东电网自动发电控制分区控制策略研究

针对传统的自动发电控制(automatic generation control,AGC)策略己不能满足电网运行控制要求的问题,结合广东电网实际运行情况,通过对电网内AGC机组调节特性、负荷变化特性的全面研究,提出了适应节能调度模式的广东电网AGC分区控制策略。该策略在保证电网各个稳定断面不越限的前提下,实现了AGC机组对电网负荷的有效跟踪调整,使高效节能机组尽可能多发电,提高了电网运行的经济性。     

便携式多功能超声波测距仪的设计与实现

本文基于超声波测距原理,利用温度、湿度双补偿方法,设计并实现了一种新型多功能测距仪。通过此超声波测距仪的试验表明,其具有精度高,性能稳定,功耗低,体积小,功能全等优点,能够满足不同场合下测温、测距、测湿度的要求。