The response of Kousa dogwood （Cornus kousa Buerg.） to extreme stresses was investigated by RGB image analysis in the hot, dry and windy summer in 2007 in Yamaguch, Japan. Results show that tip and margin leaf scorc...The response of Kousa dogwood （Cornus kousa Buerg.） to extreme stresses was investigated by RGB image analysis in the hot, dry and windy summer in 2007 in Yamaguch, Japan. Results show that tip and margin leaf scorch was observed on many Kousa dogwood trees and clearly dark brown defense barrier appeared on scorched leaves. The defense barrier withdrew back from distal to proximal gradually until successful control of scorching, and left a series of unsuccessful defense traces. By responsive analysis of leaf color homogeneity with RGB image analysis method, a sharp logistic equation was obtained for the relative green/luminance （RGL） value of scorched leaves. By the meteorological analysis, the occurrence of dogwood leaf scorch-back was almost synchronous with the aridity peak period. It sug- gested that during the sudden aridity increment the extreme water stresses induce the defense response of Kousa dogwood tree to shear the excessive transpiration leaf area, and prevent the rest of the trees from further water loss. Image pixet analysis showed that 40.2% leaf area of sampled dogwood trees was reduced through the partial leaf scorch-back by the end of August in 2007. In contrast, only 13.2% leaf area was reduced from the same trees in 2008, for the reason of sufficient precipitation during first half year. In any case, the Kousa dogwood trees indeed reduced their transpiration surface area and appeared a surface reduction pattern differing from those shedding leaves or withering all the aboveground. Based on desiccation process analysis, it is considered that the interaction of the leaf dried back and the self-defense response was the key of the transpiration surface reduction （TSR） of Kousa dogwood during sudden hot and droughty stresses.展开更多
目的观察内外合用接骨续筋汤对胫骨平台骨折术后膝关节功能及生活质量的影响。方法按随机分组法将80例胫骨平台骨折患者分为观察组和对照组,每组40例,两组均行手术治疗,术后对照组予以常规治疗,观察组在对照组基础上予以口服接骨续筋汤...目的观察内外合用接骨续筋汤对胫骨平台骨折术后膝关节功能及生活质量的影响。方法按随机分组法将80例胫骨平台骨折患者分为观察组和对照组,每组40例,两组均行手术治疗,术后对照组予以常规治疗,观察组在对照组基础上予以口服接骨续筋汤配合中药熏洗膝关节。治疗3个月后,随访比较两组患者Lysholm评分、胫骨平台内翻角(tibial plateau-tibial shaft angle,TP-TSA)和胫骨平台后倾角(posterior slope angle,PSA)、膝关节被动活动度评定(passive range of motion,PROM)、股四头肌等长峰力矩和日常生活能力(activities of daily living,ADL)评分。结果治疗后,两组患者的Lysholm评分、TP-TSA、PSA、膝关节PROM、股四头肌等长峰力矩和ADL值均较治疗前上调(P<0.05);且观察组患者的Lysholm评分、TP-TSA、PSA、膝关节PROM、股四头肌等长峰力矩和ADL值均高于对照组(P<0.05)。结论内外合用接骨续筋汤配合手术治疗胫骨平台骨折疗效确切,可有效改善患者膝关节功能,加速膝关节功能康复,对于防治术后膝关节粘连和提高生活质量有明显的积极作用。展开更多
Mitigation of blast pressure using water in a walled container was evaluated. A PETN （pentaerythritol tetranitrate） pellet of 1.4 g near the model wall was detonated on a steel plate. A water-filled container was pl...Mitigation of blast pressure using water in a walled container was evaluated. A PETN （pentaerythritol tetranitrate） pellet of 1.4 g near the model wall was detonated on a steel plate. A water-filled container was placed between the explosive and the wall. The pressure histories at six points, which corresponded to Hopkinson scaled distance of from 3.6 m·kg^-1/3 to 21.7 m·kg^-1/3 were evaluated along with dependence of mitigation effects on the amount of water and the position of the container. The presence of the water and the wall mitigated the peak overpressure near the explosion points and the positive impulse along all points. The mitigation effect was equivalent to 20-30% reduction of explosive weight based on discussion of the equivalent ratio. The presence of the water along the wall （not very close to the explosive） also mitigated the blast pressure.展开更多
A simple scheme is presented for generating four-photon Greenberger-Horne-Zeilinger (GHZ) states with interaction between a four-level atom and two bimodal cavities. In the proposed protocol, the quantum information i...A simple scheme is presented for generating four-photon Greenberger-Horne-Zeilinger (GHZ) states with interaction between a four-level atom and two bimodal cavities. In the proposed protocol, the quantum information is encoded on Fock states of the cavity fields. The detection of the atom can collapse the cavity to the desired state. The experimental feasibility of our proposal is also discussed.展开更多
基金the Special Fund of the Hubei Luojia Laboratory(Grant No.220100011)the National Key R&D Program of China(Grant No.2022YFF0503700)+1 种基金the Dragon-5 Cooperation 2020-2024(Project No.59236)the International Space Science Institute(ISSI)in Bern and Beijing through ISSI International Team Project#511(Multi-Scale Magnetosphere-Ionosphere-Thermosphere Interaction).
文摘The response of Kousa dogwood （Cornus kousa Buerg.） to extreme stresses was investigated by RGB image analysis in the hot, dry and windy summer in 2007 in Yamaguch, Japan. Results show that tip and margin leaf scorch was observed on many Kousa dogwood trees and clearly dark brown defense barrier appeared on scorched leaves. The defense barrier withdrew back from distal to proximal gradually until successful control of scorching, and left a series of unsuccessful defense traces. By responsive analysis of leaf color homogeneity with RGB image analysis method, a sharp logistic equation was obtained for the relative green/luminance （RGL） value of scorched leaves. By the meteorological analysis, the occurrence of dogwood leaf scorch-back was almost synchronous with the aridity peak period. It sug- gested that during the sudden aridity increment the extreme water stresses induce the defense response of Kousa dogwood tree to shear the excessive transpiration leaf area, and prevent the rest of the trees from further water loss. Image pixet analysis showed that 40.2% leaf area of sampled dogwood trees was reduced through the partial leaf scorch-back by the end of August in 2007. In contrast, only 13.2% leaf area was reduced from the same trees in 2008, for the reason of sufficient precipitation during first half year. In any case, the Kousa dogwood trees indeed reduced their transpiration surface area and appeared a surface reduction pattern differing from those shedding leaves or withering all the aboveground. Based on desiccation process analysis, it is considered that the interaction of the leaf dried back and the self-defense response was the key of the transpiration surface reduction （TSR） of Kousa dogwood during sudden hot and droughty stresses.
文摘目的观察内外合用接骨续筋汤对胫骨平台骨折术后膝关节功能及生活质量的影响。方法按随机分组法将80例胫骨平台骨折患者分为观察组和对照组,每组40例,两组均行手术治疗,术后对照组予以常规治疗,观察组在对照组基础上予以口服接骨续筋汤配合中药熏洗膝关节。治疗3个月后,随访比较两组患者Lysholm评分、胫骨平台内翻角(tibial plateau-tibial shaft angle,TP-TSA)和胫骨平台后倾角(posterior slope angle,PSA)、膝关节被动活动度评定(passive range of motion,PROM)、股四头肌等长峰力矩和日常生活能力(activities of daily living,ADL)评分。结果治疗后,两组患者的Lysholm评分、TP-TSA、PSA、膝关节PROM、股四头肌等长峰力矩和ADL值均较治疗前上调(P<0.05);且观察组患者的Lysholm评分、TP-TSA、PSA、膝关节PROM、股四头肌等长峰力矩和ADL值均高于对照组(P<0.05)。结论内外合用接骨续筋汤配合手术治疗胫骨平台骨折疗效确切,可有效改善患者膝关节功能,加速膝关节功能康复,对于防治术后膝关节粘连和提高生活质量有明显的积极作用。
文摘Mitigation of blast pressure using water in a walled container was evaluated. A PETN （pentaerythritol tetranitrate） pellet of 1.4 g near the model wall was detonated on a steel plate. A water-filled container was placed between the explosive and the wall. The pressure histories at six points, which corresponded to Hopkinson scaled distance of from 3.6 m·kg^-1/3 to 21.7 m·kg^-1/3 were evaluated along with dependence of mitigation effects on the amount of water and the position of the container. The presence of the water and the wall mitigated the peak overpressure near the explosion points and the positive impulse along all points. The mitigation effect was equivalent to 20-30% reduction of explosive weight based on discussion of the equivalent ratio. The presence of the water along the wall （not very close to the explosive） also mitigated the blast pressure.
基金supported by the National Natural Science Foundation of China (No.11004050)the Key Scientific Research Fund of Hunan Provincial Education Department of China (Nos.09A013 and 10B013)the Science and Technology Research Foundation of Hunan Province of China (No.2010FJ4120)
文摘A simple scheme is presented for generating four-photon Greenberger-Horne-Zeilinger (GHZ) states with interaction between a four-level atom and two bimodal cavities. In the proposed protocol, the quantum information is encoded on Fock states of the cavity fields. The detection of the atom can collapse the cavity to the desired state. The experimental feasibility of our proposal is also discussed.
