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Interference effects on the photoionization cross sections between two neighbouring atoms:nitrogen as an example
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作者 吴建华 袁建民 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第12期5283-5290,共8页
Interference effects on the photoionization cross sections between two neighbouring atoms are considered based on the coherent scattering of the ionized electrons by the two nuclei when their separation is less than o... Interference effects on the photoionization cross sections between two neighbouring atoms are considered based on the coherent scattering of the ionized electrons by the two nuclei when their separation is less than or comparable to the de Broglie wave length of the ionized electrons. As an example, the single atomic nitrogen ionization cross section and the total cross sections of two nitrogen atoms with coherently added photoionization amplitudes are calculated from the threshold to about А (1 А=0.1 nm) of the photon energy. The photoionization cross sections of atomic nitrogen are obtained by using the close-coupling R-matrix method. In the calculation 19 states are included. The ionization energy of the atomic nitrogen and the photoionization cross sections agree well with the experimental results. Based on the R-matrix results of atomic nitrogen, the interference effects between two neighbouring nitrogen atoms are obtained. It is shown that the interference effects are considerable when electrons are ionized just above the threshold, even for the separations between the two atoms are larger than two times of the bond length of N2 molecules. Therefore, in hot and dense samples, effects caused by the coherent interference between the neighbours are expected to be observable for the total photoionization cross sections. 展开更多
关键词 interference effect photoionization cross section nitrogen atom
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Inter-Operator Interference Coordination for CoPrimary Spectrum Sharing in UDN 被引量:3
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作者 YU Qiaoling WANG Jiang +3 位作者 YANG Xiumei ZHU Yuanping TENG Yong Horneman Kari 《China Communications》 SCIE CSCD 2015年第S1期104-112,共9页
Co-primary spectrum sharing for multiple operators has been utilized to fully explore the spectrum resources and thus improve the spectrum efficiency. The inter-operator interference(IOI) problem should be seriously c... Co-primary spectrum sharing for multiple operators has been utilized to fully explore the spectrum resources and thus improve the spectrum efficiency. The inter-operator interference(IOI) problem should be seriously considered in order to achieve the mentioned target, especially under the scenario of the ultradense network(UDN) in the fifth generation(5G) wireless systems. To solve this problem, we propose an asymmetrical power levels based soft IOI coordination mechanism. The shared spectrum pool is consisted of three separated parts, where each part can be dynamically adjusted according to the minimal spectrum demand from each operator. Furthermore, different power masks are configured to different parts for each operator. The simulation results show that the proposed mechanism can improve the network spectrum efficiency significantly. 展开更多
关键词 ultra-dense network inter-operator interference coordination co-primary spectrum SHARING
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A Game Theoretic Approach for Inter-Network Interference Mitigation in Wireless Body Area Networks 被引量:1
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作者 Du Dakun Hu Fengye +3 位作者 Wang Feng Wang Zhijun Du Yu Wang Lu 《China Communications》 SCIE CSCD 2015年第9期150-161,共12页
Wireless Body Area Network(WBAN) is an emerging technology to provide real-time health monitoring and ubiquitous healthcare services. In many applications, multiple wireless body area networks have to coexist in a sma... Wireless Body Area Network(WBAN) is an emerging technology to provide real-time health monitoring and ubiquitous healthcare services. In many applications, multiple wireless body area networks have to coexist in a small area, resulting in serious inter-network interference. This not only reduces network reliability that is especially important in emergency medical applications, but also consumes more power of WBANs. In this paper, an inter-network interference mitigation approach based on a power control algorithm is proposed. Power control is modeled as a non-cooperative game, in which both inter-network interference and energy efficiency of WBANs are considered. The existence and uniqueness of Nash Equilibrium in the game are proved, and an optimal scheme based on best response is proposed to find its Nash Equilibrium. By coordinating the transmission power levels among networks under interference environment, the total system throughput can be increased with minimum power consumed. The effectiveness of the proposed method has been illustrated by simulation results, where the performance of the proposed approach is evaluated in terms of overall utility and power efficiency and convergence speed. 展开更多
关键词 无线区域网络 干扰环境 博弈分析 功率控制算法 纳什均衡 功率消耗 系统吞吐量 医疗服务
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A Novel Radio Resource Management for Interference Mitigation in OFDMA System
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作者 Gao Peng Meng Dexiang +1 位作者 Song Zhiyuan Tu Guofang 《China Communications》 SCIE CSCD 2010年第1期23-29,共7页
In Orthogonal Frequency Division Multiple Access (OFDMA) systems, such as Long Term Evolution (LTE) and so on, the resources used by each user are orthogonal, and the OFDMA systems performances are mainly affected by ... In Orthogonal Frequency Division Multiple Access (OFDMA) systems, such as Long Term Evolution (LTE) and so on, the resources used by each user are orthogonal, and the OFDMA systems performances are mainly affected by the inter-cell interference. Therefore, the inter-cell interference mitigation technology becomes a hotspot. The objective of interference mitigation technologies used in OFDMA systems are to increase cell-edge throughput and average cell throughput. In this paper, the Resource Block Planning (BRBP) based scheme is proposed to mitigate the inter-cell interference and improve the cell-edge throughput. Comparison between the simulation results of BRBP and Round Robin (RR) illustrates that the enhanced performance of BRBP. 展开更多
关键词 OFDMA inter-cell interference MITIGATION cell-edge THROUGHPUT RESOURCE block planning scheme
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Dynamic Interference Coordination With Analytical Near-Optimal Power Allocation Toward High User Fairness
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作者 Lusheng Wang Yamei Wang +2 位作者 Wenqiang Chen Caihong Kai Liaoyuan Wu 《China Communications》 SCIE CSCD 2016年第12期37-48,共12页
To mitigate interference on celledge users and improve fairness of the whole system, dynamic inter-cell interference coordination(ICIC) is one of the promising solutions. However, traditional dynamic ICIC is considere... To mitigate interference on celledge users and improve fairness of the whole system, dynamic inter-cell interference coordination(ICIC) is one of the promising solutions. However, traditional dynamic ICIC is considered as an NP-hard problem and power variability further adds another dimension to this joint optimization issue, making it even more difficult to quickly reach a near-optimal solution. Therefore, we theoretically obtain the closed-form expression of the near-optimal power allocation ratio for users in adjacent cells paired in the same resource block and interfere each other, so that the total utility corresponding to α-fairness is maximized. Dynamic ICIC using this closed-form solution could improve user fairness without causing an increment of the computational complexity. Numerical results show that, compared with the schemes using identical power for different users, our method does not obviously degrade the system's average spectral efficiency. 展开更多
关键词 inter-cell interference coordination user fairness power allocation spectral efficiency
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A Resource Reuse Scheme of D2D Communication Underlaying LTE Network with Intercell Interference
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作者 Jia Liu Bingbing Li +1 位作者 Bing Lan Junren Chang 《Communications and Network》 2013年第3期187-193,共7页
With the growing concern on data rates and resource utilization, Device-to-Device (D2D) communication has been raised in 3GPP Long-Term Evolution (LTE) networks. In order to limit severe interference, previous studies... With the growing concern on data rates and resource utilization, Device-to-Device (D2D) communication has been raised in 3GPP Long-Term Evolution (LTE) networks. In order to limit severe interference, previous studies mainly focus on intra-cell interference that between cellular links and local D2D links. In this paper, we consider both intra-cell interference and inter-cell interference between D2D and cellular links. We propose a new resource reuse algorithm that D2D users reuse the minimum interference uplink (UL) Semi-Persistent Scheduling (SPS) resources to reach the highest throughput. The simulation results show that this scheme reduces interference as well as improves throughput. 展开更多
关键词 Device-to-device inter-cell interference interference Reduction Semi-Persistent SCHEDULING RESOURCE SHARING
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Combination of interference alignment and beamforming in cellular networks
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作者 周超 陈智 李玲香 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2012年第6期47-52,共6页
In this paper, we propose two joint transmit-receive iterative algorithms without the cooperation between different base stations based on the idea of interference alignment (IA) to improve the throughput of relay bac... In this paper, we propose two joint transmit-receive iterative algorithms without the cooperation between different base stations based on the idea of interference alignment (IA) to improve the throughput of relay backhaul links in cellular networks for the case of imperfect channel knowledge,which can be implemented with small changes to existing TD-LTE standards. Unlike the previous interference alignment algorithms' only reducing the sum interference to the other receivers at the transmitter or the sum received Multi-user interference (MUI) at the receiver, our algorithm shapes the transmission of each data stream at transmitters in order not only to minimize interference to the other users, but also to minimize the interference between different streams objected to the same user, suppressing the MUI and Multi-stream interference (MSI) at receivers. The proposed algorithm I is to maximize the SINR at receivers. But the complexity is relatively high. Algorithm II only needs linear operations and sacrifices a little performance for much lower complexity compared to the Maximize SINR iterative algorithm which needs the inversion operation of matrix. It is also proved that the algorithm converges monotonically. The simulation results show that the techniques have considerable performance gain compared with the previous algorithms. Further research about power allocation is also discussed. 展开更多
关键词 无线通信 移动通信 手机 3G技术
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Inter-WBAN Coexistence and Interference Mitigation
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作者 Bin Liu Xiaosong Zhao +1 位作者 Lei Zou Chang Wen Chen 《ZTE Communications》 2015年第2期28-35,共8页
With promising applications in e-health and entertainment, wireless body area networks (WBANs) have attracted the interest of both academia and industry. If WBANs are densely deployed within a small area, serious pr... With promising applications in e-health and entertainment, wireless body area networks (WBANs) have attracted the interest of both academia and industry. If WBANs are densely deployed within a small area, serious problems may arise between the WBANs. In this paper, we discuss issues related to the coexistence of WBANs and investigate the main factors that cause inter-WBAN interference. We survey inter- WBAN interference mitigation strategies and track recent research developments. We also discuss unresolved issues related to inter-WBAN interference mitigation and propose fu- ture research directions. 展开更多
关键词 wireless body area network (WBAN) inter-WBAN interference mitigation E-HEALTH
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A NOVEL ITERATIVE SCHEME FOR PARALLEL INTER-SYMBOL INTERFERENCE CHANNELS
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作者 Cheng Xiang Yuan Dongfeng 《Journal of Electronics(China)》 2007年第1期50-53,共4页
In this paper,we propose a novel iterative scheme for exploiting transmit diversity using parallel independent Inter-Symbol Interference (ISI) channels. In this adaptive iterative scheme,we use EXtrinsic Information T... In this paper,we propose a novel iterative scheme for exploiting transmit diversity using parallel independent Inter-Symbol Interference (ISI) channels. In this adaptive iterative scheme,we use EXtrinsic Information Transfer (EXIT) chart tool to choose appropriate iterative method from Itera-tive Combining (IC),used as parallel concatenation turbo-like scheme,and Turbo Equalization (TE),used as serial concatenation turbo-like scheme. It is show that the proposed iterative scheme provides excellent performance both analytically and through simulations without any compute complexity increase comparable to IC. 展开更多
关键词 信道均衡 并行码间干扰 迭代法 TURBO均衡
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Optimum weighting-coefficient-pair in inter-carrier interference self-cancellation scheme of OFDM system
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作者 Min-jian ZHAO Di ZHANG Bin CAI 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第12期1676-1684,共9页
As one of the most important components of the wideband wireless access technique, orthogonal frequency division multiplexing (OFDM) has a high usage rate of spectrum and combats inter-symbol interference (ISI) in mul... As one of the most important components of the wideband wireless access technique, orthogonal frequency division multiplexing (OFDM) has a high usage rate of spectrum and combats inter-symbol interference (ISI) in multi-path fading channel. However, when there are frequency offsets during the signal transmission, the inter-carrier interference (ICI) is introduced, which significantly degrades the performance. The existing ICI self-cancellation schemes such as PCC-OFDM are not optimum to minimize the interference considering both noise and ICI. In this paper, a new metric named SINR (signal-to-interference- and-noise ratio) is proposed. We discuss the optimization issue when a constant frequency offset exists and in time-varying channels. The optimum weighting-coefficient-pair (OWCP) is obtained, which maximizes SINR theoretically through the alternant iteration algorithm. Simulations show that the performance of OWCP-OFDM is better than that of PCC-OFDM, especially when the frequency offset is large. Although the ICI self-cancellation scheme suffers bandwidth inefficiency, from the simulation results we can also see that the performance of OWCP-OFDM is much better than that of the standard OFDM systems with the same bandwidth efficiency when a frequency offset exists. Moreover, since the redundant modulation provides the capability to suppress ICI as well as a receiving SNR gain, it can be considered as exchanging the bandwidth for SNR. 展开更多
关键词 正交频分复用技术 频率偏移 干扰 编码
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Inter-carrier Interference Analysis for MIMO-OFDM Systems in High-Speed Train Environment
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作者 王军华 焦戊臣 方勇 《Journal of Donghua University(English Edition)》 EI CAS 2015年第3期411-418,共8页
The orthogonality between the subcarriers of multipleinput multiple-output orthogonal frequency division multiplexing( MIMO-OFDM) systems is destroyed due to the Doppler frequency offset,particularly in the high-speed... The orthogonality between the subcarriers of multipleinput multiple-output orthogonal frequency division multiplexing( MIMO-OFDM) systems is destroyed due to the Doppler frequency offset,particularly in the high-speed train( HST) environment,which leads to severe inter-carrier interference( ICI). Therefore,it is necessary to analyze the mechanism and influence factor of ICI in HST environment. In this paper, by using a non-stationary geometry-based stochastic model( GBSM) for MIMO HST channels, ICI is analyzed through investigating the channel coefficients and the carrier-to-interference power ratio( CIR). It is a fact that most of signal energy spreads on itself and its several neighborhood subcarriers. By investigating the amplitude of subcarriers, CIR is used to evaluate the ICI power level. The simulation results show that the biggest impact factor for the CIR is the multipath number L and the minimum impact factor K; when the train speed υR> 400 km / h,the normalized Doppler frequency offset ε > 0. 35,the CIR tends to zero,and the communication quality will be very poor at this condition. Finally,bit error rate( BER) is investigated by simulating a specific channel environment. 展开更多
关键词 multiple-input multiple-output orthogonal frequency division multiplexing(MIMO-OFDM) systems high-speed train(HST) inter-carrier interference(ICI) non-stationary geometry-based stochastic model(G BSM) carrier-to-interference power ratio(CIR)
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升力翼高速列车前后翼干扰特性研究
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作者 张宝珍 熊小慧 +1 位作者 汪欣然 耿嘉旭 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第5期1806-1821,共16页
在高速列车车顶安装升力翼旨在通过提高列车气动升力减小轮轨作用力,是一种新型等效减重的手段。升力翼安装到高速列车顶部后,其工作环境与航空相比有很大不同,升力翼与升力翼之间存在相互干扰。以三车编组1꞉10缩比某型CRH高速列车模型... 在高速列车车顶安装升力翼旨在通过提高列车气动升力减小轮轨作用力,是一种新型等效减重的手段。升力翼安装到高速列车顶部后,其工作环境与航空相比有很大不同,升力翼与升力翼之间存在相互干扰。以三车编组1꞉10缩比某型CRH高速列车模型为研究对象,采用改进型延迟分离涡模拟(IDDES)方法,分别针对不同高度和不同间距布局的两翼高速列车进行数值模拟分析,探讨前后升力翼布局对升翼力列车气动力和周围流场结构的影响规律及其作用机理。研究结果表明:对于不同间距布局,当后翼距离前翼过近时,前翼翼尖涡流的干扰导致流速加大,压差变小,最终使气动升力有所降低;而当前后翼间距过大时,即后翼远离前翼尾流干扰范围,后翼由于无法受到前翼下洗气流的正向作用,使得升力减小。对于不同高度布局,错落式布局下前翼的尾流涡旋由于高度差的原因远离后翼,相较于等高式布局,错落式布局中前翼尾流对后翼造成的干扰程度较小。错落式布局的列车整体升力性能优于等高式布局的列车整体升力性能,且前低后高式布局下,列车的增升效果最好。综合不同间距和不同高度布局的结果可知,对于两翼高速列车,翼间距为0.90H时前低后高式布局的整车气动性能最优,尤其是列车升力可以得到显著提升。 展开更多
关键词 高速列车 升力翼 翼间干扰特性 计算流体力学
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基于FEM-DFN的页岩气井复杂裂缝扩展与优化——以长宁页岩气藏X1水平井组为例
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作者 郑健 何永生 +3 位作者 汪勇 蔡景顺 唐煊赫 朱海燕 《断块油气田》 CAS CSCD 北大核心 2024年第3期415-423,共9页
对长宁页岩气示范区水平井裂缝扩展形态认识不清、井间干扰频繁等问题严重制约了页岩气藏的高效开采。对此,文中基于地质-工程一体化思想,结合适用于多井压裂分析的有限元-离散裂缝网络(FEM-DFN)方法,分析了水平井组体积裂缝扩展形态及... 对长宁页岩气示范区水平井裂缝扩展形态认识不清、井间干扰频繁等问题严重制约了页岩气藏的高效开采。对此,文中基于地质-工程一体化思想,结合适用于多井压裂分析的有限元-离散裂缝网络(FEM-DFN)方法,分析了水平井组体积裂缝扩展形态及天然裂缝对水力裂缝扩展的影响,厘清了井间干扰因素。结果表明:在天然裂缝带发育区域,天然裂缝带对水力裂缝的诱导、捕获和阻隔作用主导了水力裂缝的扩展行为;天然裂缝带导致的水力裂缝不对称扩展、非均匀起裂是造成井间干扰的重要原因;天然裂缝带中各类裂缝的发育程度对水力裂缝扩展有重大影响。该研究成果可为长宁页岩气藏高效水力压裂参数设计提供支撑和依据。 展开更多
关键词 水力压裂 天然裂缝 裂缝扩展 井间干扰
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煤层气井整体压裂及排采技术研究:以余吾煤业为例
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作者 郭强 《能源与节能》 2024年第4期171-173,共3页
综合国内煤层气井在压裂及排采技术上的相关研究,从余吾煤业S6、 S7井区的S6102、 S7101、 S7102、 S7103工作面入手,对50口地面瓦斯抽采井进行了探索,针对压前作业情况、压裂施工情况、压裂过程评价、裂缝监测结果及压裂效果评价,对压... 综合国内煤层气井在压裂及排采技术上的相关研究,从余吾煤业S6、 S7井区的S6102、 S7101、 S7102、 S7103工作面入手,对50口地面瓦斯抽采井进行了探索,针对压前作业情况、压裂施工情况、压裂过程评价、裂缝监测结果及压裂效果评价,对压裂工程质量及整体压裂试验展开研究,同时对排采技术及整体排采制度的建立进行了分析,对煤层气井整体压裂及排采技术的发展具有一定的借鉴和指导意义。 展开更多
关键词 煤层气井 整体压裂 整体排采 井间干扰
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多波束卫星通信系统中的非线性预编码算法研究
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作者 王珂 张歆宸 +1 位作者 林文亮 邓中亮 《移动通信》 2024年第6期2-12,共11页
非地面网络(3GPP NTN)是5G演进以及6G网络中的重要组成部分,为了增强卫星容量和频谱效率,基于相控阵的密集多波束、同频部署已逐渐成为研究热点。由于波束成形中旁瓣功率泄露随着波束数增加会造成严重波束间叠加干扰,亟需低复杂度多用... 非地面网络(3GPP NTN)是5G演进以及6G网络中的重要组成部分,为了增强卫星容量和频谱效率,基于相控阵的密集多波束、同频部署已逐渐成为研究热点。由于波束成形中旁瓣功率泄露随着波束数增加会造成严重波束间叠加干扰,亟需低复杂度多用户干扰消除方案。从预编码技术角度出发,探讨了非线性预编码在卫星通信系统中的应用和优化方法,并通过实际硬件平台测试,验证了在5G NR基带链路中实现该方案的有效性和先进性。 展开更多
关键词 3GPP NTN 多波束卫星 波束间干扰 非线性预编码
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平衡位移电流技术在中央空调的应用
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作者 陶淦 林文涛 +2 位作者 何成军 李虎 刘忠 《青岛大学学报(工程技术版)》 CAS 2024年第1期60-65,109,共7页
为解决中央空调在通讯中的噪音问题,本文分析通讯回路和开关电源回路的原理,得到中央空调基板初次级之间的Y电容会形成共模干扰,造成通讯噪音。为去除Y电容,基于开关电源电磁兼容性(electromagnetic compatibility,EMC)技术,采用平衡位... 为解决中央空调在通讯中的噪音问题,本文分析通讯回路和开关电源回路的原理,得到中央空调基板初次级之间的Y电容会形成共模干扰,造成通讯噪音。为去除Y电容,基于开关电源电磁兼容性(electromagnetic compatibility,EMC)技术,采用平衡位移电流技术和双维度黄金分割法,在不改变电路架构的情况下,完成了中央空调基板去Y电容的技术升级迭代,基板上的EMC解决方案由原来的被动滤波变成了主动降噪。 展开更多
关键词 开关电源 共模干扰 平衡位移电流 双维度黄金分割
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Theoretical analysis on fully differential cross sections for C^(6+)impact ionization of helium
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作者 方小英 张瑞芳 +2 位作者 段慧晓 孙世艳 贾祥富 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第6期188-192,共5页
Fully differential cross sections (FDCS) are calculated within a four-body model for single ionization of helium by C6+ impact at the incident energy of 100 MeV/a.u. (atomic unit). The results are compared with e... Fully differential cross sections (FDCS) are calculated within a four-body model for single ionization of helium by C6+ impact at the incident energy of 100 MeV/a.u. (atomic unit). The results are compared with experimental data and other theoretical predictions. It is shown that our results are in very good agreement with experiment for three small momentum transfers in the scattering plane; however, some significant discrepancies are still present at the largest momentum transfer in both the scattering plane and the perpendicular plane. In actuality, the problem has not been explained by the theory during the last decade. Accordingly, the contributions of different scattering amplitudes to FDCS are analyzed. It is found that for the largest momentum transfer the cross section arising from a destructive interference of the three amplitudes is much smaller than the experimental data. However, the cross section due to the constructive interference of two scattering amplitudes between projectile-ionized electron interaction and projectile-passive electron interaction almost approaches the experimental data. 展开更多
关键词 ion-impact ionization fully differential cross section four-body model interference effect
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PERFORMANCE OF CODED OFDM VIA VARIABLE GUARD INTERVAL 被引量:1
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作者 LiWaiyun BakirMohammed LiuJingao ZhuShouzheng 《Journal of Electronics(China)》 2005年第1期70-76,共7页
This letter presents the principles of Coded Orthogonal Frequency Division Multiplexing (COFDM) system and focuses on the effect of the Guard Interval (GI) on the systemperformance. The role of the GI parameter period... This letter presents the principles of Coded Orthogonal Frequency Division Multiplexing (COFDM) system and focuses on the effect of the Guard Interval (GI) on the systemperformance. The role of the GI parameter period to solve the problem of interferences that occur at the receiver is discussed. A new COFDM concept with a Variable GI (VGI) is proposed in order to improve the Bit Error Rate (BER) performance in the presence of multipaths with variable delays. A series of simulations have been carried out on the BER performance as a function of GI, maximum delay spread, and Signal-to-Noise Ratio (SNR), with QPSK as modulation scheme over multipath fading and Additive White Gaussian Noise (AWGN). The results show that the optimum values of the GI parameter approximately equal to the maximum delay spread, and the proposed system with VGI provides a better performance compared with the fixed length GI. 展开更多
关键词 OFDM VIA 多路衰减 VGI 最大延迟张开 误码率
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玛湖砾岩油藏水平井压裂井间窜扰特征与机制分析 被引量:1
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作者 王林生 梁利喜 +3 位作者 覃建华 张景 魏晓琛 丁乙 《油气地质与采收率》 CAS CSCD 北大核心 2023年第6期129-137,共9页
玛湖砾岩油藏油气资源丰富,以地质工程一体化思想为指导形成的“大井丛、多层系、小井距、长井段、交错式、密切割、拉链式、工厂化”系列开发技术,已实现了百万吨级以上的年生产能力。但在实施小井距水平井、水平井体积压裂立体开发的... 玛湖砾岩油藏油气资源丰富,以地质工程一体化思想为指导形成的“大井丛、多层系、小井距、长井段、交错式、密切割、拉链式、工厂化”系列开发技术,已实现了百万吨级以上的年生产能力。但在实施小井距水平井、水平井体积压裂立体开发的过程中出现了不同程度的压裂井间窜扰现象,较大程度影响了钻/完井工程作业及稳定生产。为此,以理论研究与数值模拟相结合,开展了压裂窜扰机制研究及主控因素分析。研究结果表明:①根据水平井压裂井间窜扰的连通方式及窜扰特征,将玛湖砾岩油藏水平井压裂井间窜扰分为天然软弱结构发育导致的压裂窜扰、压裂缝沟通导致的窜扰和压裂扰动压力/应力扰动区连通诱发的邻井干扰3种类型。②水平井井距是影响水平井压裂井间窜扰以及井间窜扰程度的关键因素。当水平井井距小于300m时,研究区井间压裂窜扰发生几率大幅增大。综合考虑压裂窜扰对油藏开采的积极作用以及压裂窜扰对钻/完井工程作业、采油作业的不利影响,合理优化设计水平井井距,对砾岩油藏的安全、高效开发具有积极且重要的意义。 展开更多
关键词 砾岩 井间窜扰 水平井 压裂 井距
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Theoretical Analysis on Fully Differential Cross-Sections for C^6+ Single Ionization of Helium
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作者 Hui-xiao Duan Shi-yan Sun Xiao-ying Fang Rui-fang Zhang Xiang-fu Jia 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第3期279-284,共6页
四身体的模型被用来在几何学由 100 兆电子伏 / 原子量 C6+ 影响为氦的单个电离计算充分微分的剖面图(FDCS ) 。由与试验性的数据和另外的理论作比较,我们发现四身体的模型的结果从散布飞机在在散布飞机,而是差的同意的很好的同意。... 四身体的模型被用来在几何学由 100 兆电子伏 / 原子量 C6+ 影响为氦的单个电离计算充分微分的剖面图(FDCS ) 。由与试验性的数据和另外的理论作比较,我们发现四身体的模型的结果从散布飞机在在散布飞机,而是差的同意的很好的同意。因此,到 FDCS 的不同散布振幅的贡献被分析。生气的节几乎在几何学在 recoil 区域附近由于在射弹目标原子核相互作用和逐出射弹的电子相互作用之间的散布振幅的干扰趋于到试验性的结果,这被发现。特别地在垂直飞机,从在射弹目标原子核和逐出射弹的电子相互作用之间的散布振幅的干扰发源的生气的节在尖分发产出试验性的双山峰结构。然而,这个特征不能被三个振幅的干扰介绍。因此,在这几何学预言特征的四身体的模型的失败可以被归因于三个振幅的不恰当的 weighting。 展开更多
关键词 电离理论 全差分 电子相互作用 散射振幅 实验数据 几何形状 体模型
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