Professor Jiping ZHAO has unique thoughts on the diagnosis and treatment of peripheral facial paralysis.She pays the great attention to clinical differentiation in treatment with acupuncture, especially meridian diffe...Professor Jiping ZHAO has unique thoughts on the diagnosis and treatment of peripheral facial paralysis.She pays the great attention to clinical differentiation in treatment with acupuncture, especially meridian differentiation. She believes that the differentiation of lesion is core and the early judgment is critical for the better therapeutic effects on intractable facial paralysis. The local acupoints are selected in the guide of the theory of meridian sinew and stimulated on the base of three-needling theory. The distal acupoints are decided in light of the syndrome differentiation, of which, Hégǔ(合谷 LI 4), Zúsānlǐ(足三里ST 36) and Taichōng(太冲 LR 3) are the basic acupoints. Additionally, Professor ZHAO lays the emphasis on the 5 th branch of facial nerve(cervical branch) in diagnosis and treatment.展开更多
Twin jets flow, generated by two identical parallel axisymmetric nozzles, has been experimentally investigated. The dimensionless spacing （B） between two nozzles were set at 1.89, 1.75 and 1.5. Measurements have bee...Twin jets flow, generated by two identical parallel axisymmetric nozzles, has been experimentally investigated. The dimensionless spacing （B） between two nozzles were set at 1.89, 1.75 and 1.5. Measurements have been carded out at several free-stream velocities ranging from 10 m/s to 25 m/s or Reynolds numbers （based on the nozzle diameter of 44 mm） ranging from 3.33×10^4 to 8.33×10^4. The results show that the twin jets attract each other. With the increasing Reynolds number, the turbulence energy grows, which indicates that the twin jets attract acutely. The jet flow field and the merging process of two jets vary with B. The width of the twin jets flow spreads linearly downstream and grows with B. The merging between two jets occurs at the location closer to the nozzle exit for the cases with smaller spacing between nozzles and higher Reynolds number.展开更多
Soil cracking is an important process influencing water and solutes transport in the Yuanmou Dry-hot Valley region of Southwest China. Studying the morphological development of soil cracks helps to further reveal the ...Soil cracking is an important process influencing water and solutes transport in the Yuanmou Dry-hot Valley region of Southwest China. Studying the morphological development of soil cracks helps to further reveal the close relationship between the soil cracking process and water movement in such semi-arid regions. Here we report regular changes on surface morphology of soil cracks with decreasing water in four different soils (Typ-Ustic Ferrisols,Ver-Ustic Ferrisols,Tru-Ustic Vertisols and Typ-Ustic Vertisols) through simulation experiments. Our results indicate the following: 1) Different soils ultimately have different development degrees of soil cracks,according to their various values of crack area density. Soil cracks in Typ-Ustic Ferrisols can only develop to the feeble degree,while those in the other three soils are capable of developing into the intensive degree,and even into the extremely intensive degree. 2) Soil crack complexity,as expressed by the value of the area-weighted mean of crack fractal dimension (AWMFRAC),is found to continuously decrease as a whole through the whole cracking process in all the studied soils. 3) Soil crack connectivity shows a uniform trend in the studied soils,that is to say,connectivity gradually increases with soil crack development.展开更多
In order to detect the damage locations of complex spatial structures, a sensor region-based damage detection approach was developed based on the damage locating vectors method. A normalized damage locating index was ...In order to detect the damage locations of complex spatial structures, a sensor region-based damage detection approach was developed based on the damage locating vectors method. A normalized damage locating index was introduced to identify the damage regions. An experiment on damage detection of a substructure model of the National Swimming Center 'Water Cube' was carried out. Two damage patterns were involved in the experiment. The test model was excited by using hammer impacts. Acceleration responses of the undamaged and damaged structure model were measured. Modal parameters were identified from the acceleration responses by utilizing the eigensystem realization algorithm (ERA). By using the developed sensor region-based method, the damage regions of the substructure model were located. The results show that the proposed method is able to effec- tively locate the damage regions.展开更多
码率自适应(Adaptive BitRate,ABR)算法是视频客户端提高用户体验质量(Quality of Experience,QoE)的一种有效途径.针对现有ABR算法存在频繁缓冲、视频卡顿、画质较低和网络吞吐量预测不准确等问题,本文提出一种基于深度强化学习的码率...码率自适应(Adaptive BitRate,ABR)算法是视频客户端提高用户体验质量(Quality of Experience,QoE)的一种有效途径.针对现有ABR算法存在频繁缓冲、视频卡顿、画质较低和网络吞吐量预测不准确等问题,本文提出一种基于深度强化学习的码率自适应(Deep Reinforcement Learning based ABR,DRLA)算法.DRLA用实际网络带宽数据训练神经网络,通过收集客户端缓冲区占用率和网络吞吐量向视频服务器请求最佳码率的视频.首先,DRLA用基线函数方法优化损失函数L,用熵随机探索方法防止损失函数局部收敛;其次利用约束条件限制新旧策略的散度更新幅度提高算法的鲁棒性;最后通过置信域(trust region)优化找到最优策略,使得QoE达到最优.与现有ABR算法对比的实验结果表明:DRLA减少了训练时间,能进一步提高算法的鲁棒性和用户的QoE,并在实际环境下验证了算法的有效性.展开更多
To exploit cloud water resources to increase precipitation on the ground effectively,according to the principles of artificial precipitation enhancement,based on historical data of weather and precipitation from Fuxin...To exploit cloud water resources to increase precipitation on the ground effectively,according to the principles of artificial precipitation enhancement,based on historical data of weather and precipitation from Fuxin National Basic Meteorological Stations from 1981 to 2010,the distribution characteristics of cloud water resources,potential and countermeasures of artificial precipitation enhancement in Fuxin region of Liaoning Province were studied. The results show that the annual average quantity of cloud water resources in the air over Fuxin region over the past 30 years was 285. 6 × 10~8m^3,but the annual average precipitation was only 471.8 mm( amounting to 47.2 ×10~8m^3 of water resources),accounting for only16. 5% of total quantity of cloud water resources in the air; 12 times of artificial precipitation enhancement operation experiments were carried out by using the weather models and technical indicators suitable for artificial precipitation enhancement in Fuxin region,and the artificial precipitation efficiency was 18. 3% on average,5. 2% higher than before,and the annual average precipitation could increase by 2. 5 × 10~8m^3 approximately. All of these have great significance for implementing artificial precipitation enhancement operation scientifically and effectively,maximizing the exploitation of cloud water resources in the air,increasing total quantity of water resources,and mitigating drought in Fuxin region.展开更多
基金Supported by "Double Hundred Project" of Beijing Administration of Traditional Chinese MedicineThe Fund for Beijing Science & Technology Development of TCM:QN2016-13
文摘Professor Jiping ZHAO has unique thoughts on the diagnosis and treatment of peripheral facial paralysis.She pays the great attention to clinical differentiation in treatment with acupuncture, especially meridian differentiation. She believes that the differentiation of lesion is core and the early judgment is critical for the better therapeutic effects on intractable facial paralysis. The local acupoints are selected in the guide of the theory of meridian sinew and stimulated on the base of three-needling theory. The distal acupoints are decided in light of the syndrome differentiation, of which, Hégǔ(合谷 LI 4), Zúsānlǐ(足三里ST 36) and Taichōng(太冲 LR 3) are the basic acupoints. Additionally, Professor ZHAO lays the emphasis on the 5 th branch of facial nerve(cervical branch) in diagnosis and treatment.
基金Project supported by the Major Program of the National Natural Science Foundation of China (Grant No. 10632070).
文摘Twin jets flow, generated by two identical parallel axisymmetric nozzles, has been experimentally investigated. The dimensionless spacing （B） between two nozzles were set at 1.89, 1.75 and 1.5. Measurements have been carded out at several free-stream velocities ranging from 10 m/s to 25 m/s or Reynolds numbers （based on the nozzle diameter of 44 mm） ranging from 3.33×10^4 to 8.33×10^4. The results show that the twin jets attract each other. With the increasing Reynolds number, the turbulence energy grows, which indicates that the twin jets attract acutely. The jet flow field and the merging process of two jets vary with B. The width of the twin jets flow spreads linearly downstream and grows with B. The merging between two jets occurs at the location closer to the nozzle exit for the cases with smaller spacing between nozzles and higher Reynolds number.
基金Under the auspices of National Natural Science Foundation of China (No. 40901009)National Key Technologies Research and Development Program in the Eleventh Five-Year Plan of China (No. 2008BAD98B02, 2006BAC01A11)+1 种基金the Western Light Program of Talents Cultivating of Chinese Academy of Sciences (2008)the Foundation of Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences
文摘Soil cracking is an important process influencing water and solutes transport in the Yuanmou Dry-hot Valley region of Southwest China. Studying the morphological development of soil cracks helps to further reveal the close relationship between the soil cracking process and water movement in such semi-arid regions. Here we report regular changes on surface morphology of soil cracks with decreasing water in four different soils (Typ-Ustic Ferrisols,Ver-Ustic Ferrisols,Tru-Ustic Vertisols and Typ-Ustic Vertisols) through simulation experiments. Our results indicate the following: 1) Different soils ultimately have different development degrees of soil cracks,according to their various values of crack area density. Soil cracks in Typ-Ustic Ferrisols can only develop to the feeble degree,while those in the other three soils are capable of developing into the intensive degree,and even into the extremely intensive degree. 2) Soil crack complexity,as expressed by the value of the area-weighted mean of crack fractal dimension (AWMFRAC),is found to continuously decrease as a whole through the whole cracking process in all the studied soils. 3) Soil crack connectivity shows a uniform trend in the studied soils,that is to say,connectivity gradually increases with soil crack development.
基金Beijing Natural Science Foundation (Grant No. 8041002)the National Natural Science Foundation of China (Grant No. 8041002)+1 种基金the National Science and Technology Committee of China (Grant No. 2004BA904B02)Beijing Science and Technology Committee (Grant No. Z0004028040221)
文摘In order to detect the damage locations of complex spatial structures, a sensor region-based damage detection approach was developed based on the damage locating vectors method. A normalized damage locating index was introduced to identify the damage regions. An experiment on damage detection of a substructure model of the National Swimming Center 'Water Cube' was carried out. Two damage patterns were involved in the experiment. The test model was excited by using hammer impacts. Acceleration responses of the undamaged and damaged structure model were measured. Modal parameters were identified from the acceleration responses by utilizing the eigensystem realization algorithm (ERA). By using the developed sensor region-based method, the damage regions of the substructure model were located. The results show that the proposed method is able to effec- tively locate the damage regions.
文摘码率自适应(Adaptive BitRate,ABR)算法是视频客户端提高用户体验质量(Quality of Experience,QoE)的一种有效途径.针对现有ABR算法存在频繁缓冲、视频卡顿、画质较低和网络吞吐量预测不准确等问题,本文提出一种基于深度强化学习的码率自适应(Deep Reinforcement Learning based ABR,DRLA)算法.DRLA用实际网络带宽数据训练神经网络,通过收集客户端缓冲区占用率和网络吞吐量向视频服务器请求最佳码率的视频.首先,DRLA用基线函数方法优化损失函数L,用熵随机探索方法防止损失函数局部收敛;其次利用约束条件限制新旧策略的散度更新幅度提高算法的鲁棒性;最后通过置信域(trust region)优化找到最优策略,使得QoE达到最优.与现有ABR算法对比的实验结果表明:DRLA减少了训练时间,能进一步提高算法的鲁棒性和用户的QoE,并在实际环境下验证了算法的有效性.
基金Supported by Science and Technology Planning Project for social development in Fuxin City of Liaoning Province(20151305)
文摘To exploit cloud water resources to increase precipitation on the ground effectively,according to the principles of artificial precipitation enhancement,based on historical data of weather and precipitation from Fuxin National Basic Meteorological Stations from 1981 to 2010,the distribution characteristics of cloud water resources,potential and countermeasures of artificial precipitation enhancement in Fuxin region of Liaoning Province were studied. The results show that the annual average quantity of cloud water resources in the air over Fuxin region over the past 30 years was 285. 6 × 10~8m^3,but the annual average precipitation was only 471.8 mm( amounting to 47.2 ×10~8m^3 of water resources),accounting for only16. 5% of total quantity of cloud water resources in the air; 12 times of artificial precipitation enhancement operation experiments were carried out by using the weather models and technical indicators suitable for artificial precipitation enhancement in Fuxin region,and the artificial precipitation efficiency was 18. 3% on average,5. 2% higher than before,and the annual average precipitation could increase by 2. 5 × 10~8m^3 approximately. All of these have great significance for implementing artificial precipitation enhancement operation scientifically and effectively,maximizing the exploitation of cloud water resources in the air,increasing total quantity of water resources,and mitigating drought in Fuxin region.
