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Fluid Dynamics & Materials Processing 2023年第2期19卷 361-377页

作者： Qunyi Wang Xiaoli Ma yongbin bi Haiyan He Xiao Gu Tongjing Liu Lekun Zhao Jidong Oilfield Company Ltd.Exploration and Development Research Institute Tangshan063000China Unconventional Oil and Gas Institute China University of Petroleum(Beijing)Beijing102249China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing102249China

Current methods for the analysis of channeling-path phenomena in reservoirs cannot account for the influence of time and space on the actual seepage behavior.In the present study,this problem is addressed considering actual production data and dynamic characteristic parameters quantitatively determined in the near wellbore area by fitting the water-cut curve of the well.Starting from the dynamic relationship between injection and production data,the average permeability is determined and used to obtain a real-time quantitative characterization of the seepage behavior of the channeling-path in the far wellbore area.For the considered case study(Jidong oilfield),it is found that the seepage capacity of the channeling-path in the far wellbore area is far less(10 times smaller)than that of the channeling-path in the near wellbore area.The present study and the proposed model(combining near wellbore area and far wellbore area real-time data)have been implemented to support the definition of relevant adjustment measures to ultimately improve oil recovery.

关键词： Complex fault-block reservoirs channeling path quantitative identification characteristic parameters dynamic inversion

基于共同稀疏贝叶斯学习的多频等效源近场声全息方法

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振动与冲击 2024年第5期43卷 260-267页

作者：张凤敏张小正周蓉张永斌毕传兴合肥工业大学噪声振动研究所合肥230009

现有基于压缩感知的等效源近场声全息方法通常采用基于单频处理的单测量向量模型进行声场重建,此模型存在噪声鲁棒性较差以及重建精度不足的问题。实际中噪声源往往具有宽频特征,同一位置处不同频率的等效源源强聚集从而呈现共同稀疏特... 详细信息

现有基于压缩感知的等效源近场声全息方法通常采用基于单频处理的单测量向量模型进行声场重建,此模型存在噪声鲁棒性较差以及重建精度不足的问题。实际中噪声源往往具有宽频特征,同一位置处不同频率的等效源源强聚集从而呈现共同稀疏特性,若充分利用源强的共同稀疏特性,可以改善重建性能。因此,提出一种基于共同稀疏贝叶斯学习的多频等效源近场声全息方法。在该方法中,首先采用多频协同处理,构建多频等效源近场声全息模型;然后为等效源源强施加共同稀疏约束,并使用共同稀疏贝叶斯学习方法求解等效源源强。与单频等效源近场声全息方法相比,所提方法可以获得更高的重建精度和更好的噪声鲁棒性。通过单极子声源仿真和小音箱试验验证了所提方法的优越性。

关键词：近场声全息等效源方法共同稀疏贝叶斯学习多频处理

考虑启动压力梯度的致密油藏水平井裂缝干扰渗流特征

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岩性油气藏 2024年第3期36卷 172-179页

作者：钟会影余承挚沈文霞毕永斌伊然倪浩铭东北石油大学提高采收率教育部重点实验室黑龙江大庆163318 中国石油冀东油田公司南堡油田作业区河北唐山063005 中国石油大庆油田公司第六采油厂黑龙江大庆163114 北京大学鄂尔多斯能源研究院内蒙古鄂尔多斯017010

针对致密油开发中体积压裂水平井裂缝干扰的问题,在三线性流模型的基础上,通过引入半渗透边界条件和井间干扰系数α,建立了考虑未改造区启动压力梯度的致密油藏水平井裂缝干扰渗流模型,对不同干扰情况下水平井井底压力动态及产量递减特... 详细信息

针对致密油开发中体积压裂水平井裂缝干扰的问题,在三线性流模型的基础上,通过引入半渗透边界条件和井间干扰系数α,建立了考虑未改造区启动压力梯度的致密油藏水平井裂缝干扰渗流模型,对不同干扰情况下水平井井底压力动态及产量递减特征进行了研究。研究结果表明:(1)α越大,裂缝干扰条数越多,压力动态曲线改造区线性流持续的时间越长,改造区窜流、拟稳定流动发生得越晚;未改造区启动压力梯度越大,拟稳定流发生的时间就越早。(2)裂缝导流能力越大,主裂缝线性流出现时间越早,两井裂缝导流能力越接近,α对压力动态的影响较明显。(3)α越大,井底压力相对较低的水平井初期产量越高,至晚期后,产量下降越明显,无因次启动压力梯度越大,后期产量递减越快。(4)裂缝导流能力越小,前期阶段产量曲线越靠下,两井裂缝导流能力相近时,α对产量的干扰相对较大。

关键词：致密油藏井间干扰系数启动压力梯度裂缝导流能力渗流特征

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黏弹性聚合物驱渗流机理研究进展

力学学报 2024年第3期56卷 847-861页

作者：钟会影史博文毕永斌沈文霞许严芮尹洪军夏惠芬赵欣东北石油大学提高油气采收率教育部重点实验室黑龙江大庆163318 中国石油冀东油田公司南堡作业区河北唐山063200 中国石油大庆油田有限责任公司勘探开发研究院黑龙江大庆163414

聚合物驱已成为国内外化学驱中提高原油采收率主要方法之一,其在大庆油田的60年开发稳产中起到重要作用,在水驱基础上提高原油采收率达到约13%.聚合物驱主要机理为改善流度比,提高注入液的波及体积,从而提高驱油效率.近几年,聚合物溶液... 详细信息

聚合物驱已成为国内外化学驱中提高原油采收率主要方法之一,其在大庆油田的60年开发稳产中起到重要作用,在水驱基础上提高原油采收率达到约13%.聚合物驱主要机理为改善流度比,提高注入液的波及体积,从而提高驱油效率.近几年,聚合物溶液黏弹性能够进一步扩大其在多孔介质中的微观波及面积从而提高微观驱油效率的作用机理也逐渐被人们所认识.文章从聚合物溶液黏弹特性、聚合物驱微观可视化实验、岩心驱替实验及驱油机理理论研究4个方面进行了综合分析,对比论述了国内外关于黏弹性聚合物溶液渗流机理的研究现状、实验手段及方法,给出了聚合物溶液的黏弹性产生的法向应力能够进一步对水驱后残余油产生“拉”“拽”作用,从而使其比纯黏性流体进一步提高在多孔介质内的微观波及效率及驱油效率,明确了弹性湍流是产生表观增稠的本质,对提高驱油效率产生一定的正向影响.最后针对黏弹性聚合物驱渗流机理研究面临的问题及发展方向进行总结,弹性湍流产生的条件、黏弹性对不同尺寸孔隙内不同类型原油采收率的贡献及弹性与油藏润湿性的协同影响等机理成为未来研究的挑战与方向.论文的归纳能够为黏弹性聚合物溶液机理深入研究及矿场设计优选聚合物提供重要的参考.

关键词：黏弹性聚合物渗流机理松弛时间驱油效率弹性湍流

An Improved Time-Domain Inverse Technique for Localization and Quantifcation of Rotating Sound Sources

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Chinese Journal of Mechanical Engineering 2023年第5期36卷 304-314页

作者： Xiaozheng Zhang Yinlong Li yongbin Zhang Chuanxing bi Jinghao Li Liang Xu Institute of Sound and Vibration Research Hefei University of TechnologyHefei 230009China Volkswagen(Anhui)Automotive Company Limited Hefei 230000China East China Electric Power Test&Research Institute China Datang Corporation Science and Technology General Research Institute Co.LTDHefei 230088China

The time-domain inverse technique based on the time-domain rotating equivalent source method has been proposed to localize and quantify rotating sound sources. However, this technique encounters two problems to be addressed: one is the time-consuming process of solving the transcendental equation at each time step, and the other is the difculty of controlling the instability problem due to the time-varying transfer matrix. In view of that, an improved technique is proposed in this paper to resolve these two problems. In the improved technique, a de-Dopplerization method in the time-domain rotating reference frame is frst applied to eliminate the Doppler efect caused by the source rotation in the measured pressure signals, and then the restored pressure signals without the Doppler efect are used as the inputs of the time-domain stationary equivalent source method to locate and quantify sound sources. Compared with the original technique, the improved technique can avoid solving the transcendental equation at each time step, and facilitate the treatment of the instability problem because the transfer matrix does not change with time. Numerical simulation and experimental results show that the improved technique can eliminate the Doppler efect efectively, and then localize and quantify the rotating nonstationary or broadband sources accurately. The results also demonstrate that the improved technique can guarantee a more stable reconstruction and compute more efciently than the original one.

关键词： Rotating sound sources De-Dopplerization Time-domain equivalent source method

Patch nearfield acoustic holography combined with sound field separation technique applied to a non-free field

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Science China(Physics,Mechanics & Astronomy) 2015年第2期58卷 33-41页

作者： bi ChuanXing ING WenQian ZHANG yongbin XU Liang Institute of Sound and Vibration Research Hefei University of Technology

The conventional nearfield acoustic holography(NAH) is usually based on the assumption of free-field conditions, and it also requires that the measurement aperture should be larger than the actual source. This paper is to focus on the problem that neither of the above-mentioned requirements can be met, and to examine the feasibility of reconstructing the sound field radiated by partial source, based on double-layer pressure measurements made in a non-free field by using patch NAH combined with sound field separation technique. And also, the sensitivity of the reconstructed result to the measurement error is analyzed in detail. Two experiments involving two speakers in an exterior space and one speaker inside a car cabin are presented. The experimental results demonstrate that the patch NAH based on single-layer pressure measurement cannot obtain a satisfied result due to the influences of disturbing sources and reflections, while the patch NAH based on double-layer pressure measurements can successfully remove these influences and reconstruct the patch sound field effectively.

关键词：近场声全息分离技术自由场声场压力测量贴片 NAH 测量误差

Novel Method for Selection of Regularization Parameter in the Near-field Acoustic Holography

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Chinese Journal of Mechanical Engineering 2011年第2期24卷 285-292页

作者： ZHANG yongbin bi Chuanxing XU Liang CHEN Xinzhao Institute of Sound and Vibration Research Hefei University qf Technology Hefei 230009 China

Because of the ill-posedness of the near-field acoustic holography（NAH）,the regularization method is required to stabilize the computational process of NAH.The regularization effect is related to how to select the parameter correctly and effectively.However the L-curve method commonly used for the selection of regularization parameters has the disadvantages of wrong selection and incorrect selection,which influences the application of NAH.For the purpose of solving the problems existed in the L-curve method,the （？）-curve method is introduced into the field of NAH,and the performance applied to NAH directly is analyzed on the basis of equivalent source method-based NAH.However,it is found out via investigations that the（？）-curve method in NAH also has the problem of wrong selection and is unable to choose the regularization parameter correctly.In order to select the parameter correctly and effectively,a novel method for selecting regularization parameters is proposed based on the original（？）-curve method,which can be called improved （？）-curve method.In the proposed method the regularization parameters are discretized linearly between the largest singular value and the smallest singular value,and the solution norm and the residual norm corresponding to these regularization parameters are also described in a linear coordinate instead of in a lg-lg coordinate,which are the two main differences compared with the L-curve and with the original（？）-curve method.In linear coordinate and using the linearly discretized regularization parameters,the solution norm is a monotonically decreasing function of the residual norm as the increase of the regularization parameter,moreover the curve is convex everywhere.So the regularization parameters can be selected correctly and effectively based on the improved（？）-curve method.Then a numerical simulation is done with a simply supported plate to verify the validity of the proposed method.Experiments with two actual sources,a clamped plate and the double speakers,are carried out to do

关键词： near-field acoustic holography（NAH） regularization parameter selection

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基于多头指针的司法事件检测方法

广西科学 2024年第2期31卷 335-345页

作者：张小丽黄辉黄瑞章秦永彬陈艳平贵州大学文本计算与认知智能教育部工程研究中心贵州贵阳550025 贵州大学公共大数据国家重点实验室贵州贵阳550025 贵州大学计算机科学与技术学院贵州贵阳550025

针对如何解决中文司法事件检测中触发词与上下文关系不足以判定事件实例、案件触发词表述相似以及同一个案件中多个触发词识别和分类模糊的问题,本研究提出一种基于多头指针的司法事件检测方法。首先,该方法将上下文信息和罪名特征融合... 详细信息

针对如何解决中文司法事件检测中触发词与上下文关系不足以判定事件实例、案件触发词表述相似以及同一个案件中多个触发词识别和分类模糊的问题,本研究提出一种基于多头指针的司法事件检测方法。首先,该方法将上下文信息和罪名特征融合作为输入,使用双向长短期记忆(bi-directional Long Short-Term Memory,biLSTM)网络捕获数据依赖关系,深入提取特征;然后,使用多头指针网络对字符间的依赖关系进行建模,有效捕捉句子中的触发词;最后,利用指针标注技术抽取触发词,实现司法事件的有效检测。在公开司法数据集LEVEN上实验验证该方法的有效性,其中微平均和宏平均的F1指标达到了87.53%和78.05%,优于现有模型。该方法不仅显著提高了事件触发词的识别精度,而且也增强了对复杂司法文本中事件上下文关系的把握能力。

关键词：司法事件检测触发词上下文关系罪名特征多头指针

CeO_(2)/bi_(2)WO_(6) Z型异质结构建及高效催化降解盐酸四环素

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过程工程学报 2024年第1期24卷 117-126页

作者：吴平平孟冠华杜宇刘宝河施绪周瑞江用彬章慧娟安徽工业大学能源与环境学院安徽马鞍山243002 教育部生物膜法水质净化及利用技术工程研究中心安徽马鞍山243002

盐酸四环素(TC)作为一种广谱抗生素,广泛应用于临床医学、畜牧业和水产养殖业,致使大量TC废水排放到水生环境中,并通过食物链危害人类健康。光催化作为一种先进的氧化技术,在处理难降解废水方面具有显著优势。本工作在水热法制备bi2WO6... 详细信息

盐酸四环素(TC)作为一种广谱抗生素,广泛应用于临床医学、畜牧业和水产养殖业,致使大量TC废水排放到水生环境中,并通过食物链危害人类健康。光催化作为一种先进的氧化技术,在处理难降解废水方面具有显著优势。本工作在水热法制备bi2WO6的基础上,以共沉淀法掺杂适量的CeO_(2)合成复合催化剂CeO_(2)/bi_(2)WO_(6),并对其晶体结构、形貌特征和光吸收性能等进行表征。结果表明,CeO_(2)/bi_(2)WO_(6)摩尔比、催化剂投加量、TC初始浓度和溶液初始pH值对可见光催化降解TC有显著的影响,其中,CeO_(2)/bi_(2)WO_(6)异质结的形成能够有效提高光生电子空穴的分离效率,进而增强光催化效率。当CeO_(2)/bi_(2)WO_(6)的摩尔比为1:3、溶液初始pH为5、TC浓度为8 mg/L、CeO_(2)/bi_(2)WO_(6)投加量为0.4 g/L时,TC和溶液总有机碳(TOC)的去除率可分别达90.7%和64.3%。根据自由基捕获实验和催化剂的价带、导带位置,提出CeO_(2)/bi_(2)WO_(6)异质结光催化降解TC的机理。经过6次循环实验,CeO_(2)/bi_(2)WO_(6)催化剂对TC去除率仍为86.4%。

关键词： CeO_(2)/bi_(2)WO_(6) Z型异质结可见光光催化盐酸四环素

Traditional Chinese Medicine syndrome patterns and Qi-regulating,chest-relaxing and blood-activating therapy on cardiac syndrome X

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Journal of Traditional Chinese Medicine 2013年第2期33卷 194-199页

作者： Yingfei bi Jingyuan Mao Xianliang Wang yongbin Ge Henghe Wang Zhenpeng Zhang Department of Cardiovascular the First Teaching Hospital of Tianjin University of Chinese Medicine Department of Cardiovascular Guang'anmen Hospital of China Academy of Chinese Medical Sciences

OBJECTIVE:To master the syndrome patterns characteristics and explore the effective therapy methods ofTraditional Chinese Medicine(TCM) for cardiac syndrome X(CSX).METHODS:The TCM syndrome characteristics were mastered and the TCM intervention programs were determined by clinical investigations for TCM syndrome patterns characteristics of CSX patients.Then,the clinical efficacy studies on TCM intervention for CSX were carried out through randomized controlled trials.RESULTS:CSX is a clinical syndrome with the main manifestations of chest pain and chest stuffiness,and Qi stagnation,phlegm retention and blood stasis are the basic symptoms of CSX.As a result,the Qi-regulating,chest-relaxing and blood-activating therapy integrated with some Western Medicines was adopted for treatment.The effect of Qi-regulating,chest-relaxing and blood-activating therapy can reduce the frequency and degree of angina,improve the symptoms and exercise the tolerance of patients,inhibit the inflammatory response of vascular walls and protect the function of vascular endothelial cells,which is better than that of the simple and conventionalWestern Medicine alone.CONCLUSION:A good effect was achieved in the integration of Chinese and Western Medicines for CSX.The therapy is worthy to be applied further in clinical practice.On the other hand,more long-term and randomised controlled studies with large samples are still required to further determine the clinical efficacy and safety of the therapy.

关键词：中国传统医学辨证分型 X综合征胸部松弛疗法活血中医证候