In view of complex geological characteristics and alternating loading conditions associated with cyclic large amount of gas injection and withdrawal in underground gas storage(UGS) of China, a series of key gas storag...In view of complex geological characteristics and alternating loading conditions associated with cyclic large amount of gas injection and withdrawal in underground gas storage(UGS) of China, a series of key gas storage construction technologies were established, mainly including UGS site selection and evaluation, key index design, well drilling and completion, surface engineering and operational risk warning and assessment, etc. The effect of field application was discussed and summarized. Firstly, trap dynamic sealing capacity evaluation technology for conversion of UGS from the fault depleted or partially depleted gas reservoirs. A key index design method mainly based on the effective gas storage capacity design for water flooded heterogeneous gas reservoirs was proposed. To effectively guide the engineering construction of UGS, the safe well drilling, high quality cementing and high pressure and large flow surface injection and production engineering optimization suitable for long-term alternate loading condition and ultra-deep and ultra-low temperature formation were developed. The core surface equipment like high pressure gas injection compressor can be manufactured by our own. Last, the full-system operational risk warning and assessment technology for UGS was set up. The above 5 key technologies have been utilized in site selection, development scheme design, engineering construction and annual operations of 6 UGS groups, e.g. the Hutubi UGS in Xinjiang. To date, designed main indexes are highly consistent with actural performance, the 6 UGS groups have the load capacity of over 7.5 billion cubic meters of working gas volume and all the storage facilities have been running efficiently and safely.展开更多
空间正则化相关滤波算法跟踪过程中仅采用手工特征表征目标,高斯-赛德尔方法训练滤波器的复杂度高,跟踪结果不可靠时仍逐帧更新模型,导致跟踪效果不佳。针对空间正则化相关滤波算法存在的问题,提出深度特征目标感知交替方向乘子法(Alter...空间正则化相关滤波算法跟踪过程中仅采用手工特征表征目标,高斯-赛德尔方法训练滤波器的复杂度高,跟踪结果不可靠时仍逐帧更新模型,导致跟踪效果不佳。针对空间正则化相关滤波算法存在的问题,提出深度特征目标感知交替方向乘子法(Alternating Direction Method of Multipliers,ADMM)优化多指标更新相关滤波跟踪算法。该算法融入预训练网络提取的深度特征,并依回归损失的梯度信息进行通道选择,增强了对目标的表征能力;采用交替方向乘子法训练相关滤波器,降低算法复杂度,提升跟踪速度;根据多指标更新方法判断是否进行模型更新,不但提升了算法运行效率,而且避免了因学习到错误信息而导致的模型腐败。实验结果表明,所提算法的成功率、精确度在数据集OTB2015上均优于其它8种对比算法,且在复杂场景下具有更强的跟踪鲁棒性。展开更多
为了克服正则化理论的全变分图像盲复原模型中出现的运行效率低、效果不好等问题,提出一种基于交替方向乘子法的盲复原迭代算法。该算法通过交替迭代的方式,将复原图像与点扩散函数交替估计,同时不必更新惩罚项从而提高了运行速度和复...为了克服正则化理论的全变分图像盲复原模型中出现的运行效率低、效果不好等问题,提出一种基于交替方向乘子法的盲复原迭代算法。该算法通过交替迭代的方式,将复原图像与点扩散函数交替估计,同时不必更新惩罚项从而提高了运行速度和复原的质量。计算同时加入了对点扩散函数的归一化和阈值约束条件以及对图像的正定性条件。数值试验中,对不同模糊类型的图像进行了盲复原处理,并与已有的其他盲复原方法进行了比较。从主观评价能够发现,提出的算法能够改进图像的质量,提高其分辨率;通过客观指标比较,峰值信噪比(peak signal to noise ratio,PSNR)最大能够提高1.2 d B,结构相似度(structural similarity index,SSIM)最大提高1%,计算时间最大节约一半左右。展开更多
The rotary ring flume is used to study the silty sand movement in a periodic alternating current.Characteristics of sediment movement of different coasts in the tidal current are summarized.More detailed analysis of e...The rotary ring flume is used to study the silty sand movement in a periodic alternating current.Characteristics of sediment movement of different coasts in the tidal current are summarized.More detailed analysis of erosion-sedimentation function in a numerical simulation is made.The equilibrium sediment concentration is advanced.Based on the equilibrium sediment concentration,the seabed erosion-sedimentation index is derived and the seabed erosion-sedimentation calculation is analyzed.The seabed erosion-sedimentation index is used to calculate the seabed evolution of Yangshan sea area and a good agreement with field measurements is obtained.展开更多
As one of common physical and mental ailments, insomnia may cause serious adverse effects on a patient＇s daily life. And serious accidents occur in long-term cases.1 Despite comprehensive treatments, 9.38%-17.0% of...As one of common physical and mental ailments, insomnia may cause serious adverse effects on a patient＇s daily life. And serious accidents occur in long-term cases.1 Despite comprehensive treatments, 9.38%-17.0% of the treated insomniacs fail to benefit at all. Thus the term of ＂refractory insomnia＂ has been coined.24 At present, there is no literature reporting the roles of estazolam plus alternating current magnetic field （ACMF） for treating insomnia. In the present study, estazolam plus ACMF was employed for the patients with refractory insomnia so as to explore the clinical efficacies of such a combined modality.展开更多
基金Supported by the CNPC Science and Technology Major Project(2015E-4002)
文摘In view of complex geological characteristics and alternating loading conditions associated with cyclic large amount of gas injection and withdrawal in underground gas storage(UGS) of China, a series of key gas storage construction technologies were established, mainly including UGS site selection and evaluation, key index design, well drilling and completion, surface engineering and operational risk warning and assessment, etc. The effect of field application was discussed and summarized. Firstly, trap dynamic sealing capacity evaluation technology for conversion of UGS from the fault depleted or partially depleted gas reservoirs. A key index design method mainly based on the effective gas storage capacity design for water flooded heterogeneous gas reservoirs was proposed. To effectively guide the engineering construction of UGS, the safe well drilling, high quality cementing and high pressure and large flow surface injection and production engineering optimization suitable for long-term alternate loading condition and ultra-deep and ultra-low temperature formation were developed. The core surface equipment like high pressure gas injection compressor can be manufactured by our own. Last, the full-system operational risk warning and assessment technology for UGS was set up. The above 5 key technologies have been utilized in site selection, development scheme design, engineering construction and annual operations of 6 UGS groups, e.g. the Hutubi UGS in Xinjiang. To date, designed main indexes are highly consistent with actural performance, the 6 UGS groups have the load capacity of over 7.5 billion cubic meters of working gas volume and all the storage facilities have been running efficiently and safely.
文摘空间正则化相关滤波算法跟踪过程中仅采用手工特征表征目标,高斯-赛德尔方法训练滤波器的复杂度高,跟踪结果不可靠时仍逐帧更新模型,导致跟踪效果不佳。针对空间正则化相关滤波算法存在的问题,提出深度特征目标感知交替方向乘子法(Alternating Direction Method of Multipliers,ADMM)优化多指标更新相关滤波跟踪算法。该算法融入预训练网络提取的深度特征,并依回归损失的梯度信息进行通道选择,增强了对目标的表征能力;采用交替方向乘子法训练相关滤波器,降低算法复杂度,提升跟踪速度;根据多指标更新方法判断是否进行模型更新,不但提升了算法运行效率,而且避免了因学习到错误信息而导致的模型腐败。实验结果表明,所提算法的成功率、精确度在数据集OTB2015上均优于其它8种对比算法,且在复杂场景下具有更强的跟踪鲁棒性。
文摘为了克服正则化理论的全变分图像盲复原模型中出现的运行效率低、效果不好等问题,提出一种基于交替方向乘子法的盲复原迭代算法。该算法通过交替迭代的方式,将复原图像与点扩散函数交替估计,同时不必更新惩罚项从而提高了运行速度和复原的质量。计算同时加入了对点扩散函数的归一化和阈值约束条件以及对图像的正定性条件。数值试验中,对不同模糊类型的图像进行了盲复原处理,并与已有的其他盲复原方法进行了比较。从主观评价能够发现,提出的算法能够改进图像的质量,提高其分辨率;通过客观指标比较,峰值信噪比(peak signal to noise ratio,PSNR)最大能够提高1.2 d B,结构相似度(structural similarity index,SSIM)最大提高1%,计算时间最大节约一半左右。
基金The Public Science and Technology Research Funds Projects of Ocean under contract Nos 200905001 and 201005019UNESCO-IHE Partnership Research Fund (UPaRF) under contract No.60038881the National Natural Science Foundation of China under contract No.50939003
文摘The rotary ring flume is used to study the silty sand movement in a periodic alternating current.Characteristics of sediment movement of different coasts in the tidal current are summarized.More detailed analysis of erosion-sedimentation function in a numerical simulation is made.The equilibrium sediment concentration is advanced.Based on the equilibrium sediment concentration,the seabed erosion-sedimentation index is derived and the seabed erosion-sedimentation calculation is analyzed.The seabed erosion-sedimentation index is used to calculate the seabed evolution of Yangshan sea area and a good agreement with field measurements is obtained.
文摘As one of common physical and mental ailments, insomnia may cause serious adverse effects on a patient＇s daily life. And serious accidents occur in long-term cases.1 Despite comprehensive treatments, 9.38%-17.0% of the treated insomniacs fail to benefit at all. Thus the term of ＂refractory insomnia＂ has been coined.24 At present, there is no literature reporting the roles of estazolam plus alternating current magnetic field （ACMF） for treating insomnia. In the present study, estazolam plus ACMF was employed for the patients with refractory insomnia so as to explore the clinical efficacies of such a combined modality.
