目的比较关节镜下H-Loop无结双排技术与缝线桥技术修复L型肩袖撕裂的临床疗效。方法回顾性分析2019年1至2021年12月于中山大学孙逸仙纪念医院接受关节镜下修复L型肩袖损伤的患者58例。采用关节镜下H-Loop无结双排技术16例,男8例、女8例...目的比较关节镜下H-Loop无结双排技术与缝线桥技术修复L型肩袖撕裂的临床疗效。方法回顾性分析2019年1至2021年12月于中山大学孙逸仙纪念医院接受关节镜下修复L型肩袖损伤的患者58例。采用关节镜下H-Loop无结双排技术16例,男8例、女8例,年龄(63.69±8.78)岁(范围50~74岁);采用关节镜下缝线桥技术42例,男24例、女18例,年龄(61.02±7.02)岁(范围50~73岁)。观察指标包括美国肩肘外科协会(American Shoulder and Elbow Surgeons,ASES)评分、美国加州大学洛杉矶分校(University of California Los Angeles)肩关节功能评分、Constant-Murley评分、简单肩关节功能检查(simple shoulder test,SST)评分、肩关节活动度及肌力。结果两组患者均获得随访,H-Loop组患者随访时间为(12.81±0.98)个月,缝线桥组为(13.29±0.94)个月。两组患者的年龄、性别、优势手、术前症状时间、撕裂形状、撕裂大小和肱二头肌长头腱切断等因素的差异无统计学意义(P>0.05)。H-Loop组患者手术时间为(67.50±16.02)min,较缝线桥组的(76.67±13.19)min更短,差异有统计学意义(t=2.234,P=0.031);锚钉数量(2.00±0)个,较缝线桥组的(4.14±0.35)个更少,差异有统计学意义(t=16.573,P<0.001)。H-Loop组和缝线桥组ASES评术前分别为(57.44±15.91)分和(58.21±16.58)分,术后1年提高至(92.00±4.41)分和(87.71±6.19)分,手术前后的差异有统计学意义(F=53.439,P<0.001;F=72.511,P<0.001);UCLA评分术前分别为(20.63±3.79)分和(20.83±5.78)分,术后1年提高至(31.56±3.65)分和(30.36±4.71)分,手术前后的差异有统计学意义(F=57.788,P<0.001;F=50.043,P<0.001);Constant-Murley评分术前分别为(68.50±15.31)分和(66.21±16.51)分,术后1年提高至(87.5±8.70)分和(86.33±9.14)分,手术前后的差异有统计学意义(F=6.733,P<0.001;F=30.173,P<0.001);SST评分术前分别为(6.38±3.76)分和(6.55±3.31)分,术后1年提高至(9.06±2.59)分和(9.17±2.45)分,手术前后的差异有统计学意义(F=2.847,P<0.001;F=11.096,P<0.001)。H-Loop组和缝线桥组肩关节前屈活动度分别从术前158.75°±21.25°和139.29°±45.12°,提高至术后1年的178.75°±47.07°和179.76°±3.42°,差异有统计学意义(t=3.814,P=0.002;t=5.877,P<0.001);肩关节外展活动度分别从术前145°±45.46°和135.24°±47.07°,提高至术后1年的178.75°±3.42°和179.76°±1.54°,组间差异无统计学意义(t=2.952,P=0.001;t=6.185,P<0.001)。H-Loop组和缝线桥组肩关节肌力分别从术前(53.36±25.21)N和(43.31±24.49)N,提高至术后1年的(73.69±24.09)N和(61.8±30.07)N,组间差异有统计学意义(t=4.916,P<0.001;t=5.623,P<0.001)。术后1年H-Loop组ASES评分为(92.00±4.41)分高于缝线桥组的(87.71±6.19)分,差异有统计学意义(t=2.529,P=0.014);UCLA评分、Constant-Murley评分、SST评分、肩关节活动度和肌力的组间差异均无统计学意义(P>0.05)。结论H-Loop无结双排技术能获得良好的早期疗效;与传统缝线桥技术相比,术后早期的ASES评分较高,同时具有手术时间短、锚钉应用少的优势。展开更多
Unmanned aerial vehicle technology was used to survey the vegetation coverage of typical urban-rural fringe, and descriptive statistics and geostatistical methods were used to analyze the urban-rural fringe of spatial...Unmanned aerial vehicle technology was used to survey the vegetation coverage of typical urban-rural fringe, and descriptive statistics and geostatistical methods were used to analyze the urban-rural fringe of spatial heterogeneity of vegetation coverage. The results showed that vegetation coverage in the study area was 27.2176% with the coefficient of variation of 31.7786%; that the vegetation coverage in separation distance of 〈0.18＇ showed positive spatial correlation, and the spatial correlation of vegetation coverage in separation distance of 〈0.18＇ was greater than that in 〉0.18＇; that the best fitting model for Semivariance function was exponential model with spatial variation ratio 0.726, which showed strong spatial correlation, and the spatial correlated scale was 0.18＇; that the vegetation coverage data in the study area was relatively stable, and the instability mainly occurred on the border of the study area and the surroundings.展开更多
The recent advances in wireless communication technology enable high-speed vehicles to download data from roadside units(RSUs). However, the data download volume of individual vehicle is rather restricted due to high ...The recent advances in wireless communication technology enable high-speed vehicles to download data from roadside units(RSUs). However, the data download volume of individual vehicle is rather restricted due to high mobility and limited transmission range of vehicles, bringing users poor performance. To address this issue, we exploit the combination of both clustering and carry-and-forward schemes in this paper. Our scheme coordinates the cooperation of multiple infrastructures, cluster formation in the same direction and data forwarding of reverse vehicles to facilitate the target vehicle to download large-size content in dark areas. The process of data dissemination and achievable data download volume are then derived and analyzed theoretically. Finally, we conduct extensive simulations to verify the performance of the proposed scheme. Results show significant benefits of the proposed scheme in terms of increasing data download volume and throughput.展开更多
We present a controlled secure quantum communication protocol using non-maximally （pure） entangled W states first, and then discuss the basic requirements for a real quantum communication. We show that the authorize...We present a controlled secure quantum communication protocol using non-maximally （pure） entangled W states first, and then discuss the basic requirements for a real quantum communication. We show that the authorized two users can exchange their secret messages with the help of the controller after purifying the non-maximally entangled states quantum channel unconditionally securely and simultaneously. Our quantum communication protocol seems even more feasible within present technologies.展开更多
IEEE802.15.4 is the communication protocol meeting the requirements of short distance and low transmission rate, and achieving the objective of low power. The technique is an emerging wireless communication standard. ...IEEE802.15.4 is the communication protocol meeting the requirements of short distance and low transmission rate, and achieving the objective of low power. The technique is an emerging wireless communication standard. It is a two-way wireless communication technology with short distance, low complexity, low power consumption and low data transmission rate and low cost. The paper analyzes the features, framework, performance indicators and overall hardware platform structure of JN5121 chip which is used in JENNIC Corporation. And the paper researches the characteristics of actual oroducts for project development.展开更多
We demonstrate terahertz(THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of...We demonstrate terahertz(THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of a THz quantum cascade laser. Multiple emission peaks are observed within a frequency range corresponding to the bandgap of a periodic counterpart with no disorder, indicating the presence of mode localization aided by Bragg scattering. Simulations and experimental measurements provide strong evidence for the spatial localization of the THz laser modes.展开更多
The structure of [Bmim]2CuCl4 ionic liquids （Bmim： 1-butyl-3-methylimidazolium） with different ratios of H2O and C2H5OH was investigated using X-ray absorption fine structure （XAFS） technique. In this study, XAFS...The structure of [Bmim]2CuCl4 ionic liquids （Bmim： 1-butyl-3-methylimidazolium） with different ratios of H2O and C2H5OH was investigated using X-ray absorption fine structure （XAFS） technique. In this study, XAFS was employed to directly probe the conformational variations of copper ions in [Bmim]2CuCl4 with the addition of either water or ethanol. XAFS analysis confirmed that the structure of ionic liquids gradually transformed from tetrahedral to octahedral configuration with the increase in ratio of H2O. Our results also showed that water molecules coordinated with the copper ions of [Bmim]2CuCl4, leading to the conformational change in ionic liquids. However, the XAFS spectra of [Bmim]zCuCIa/C2H5OH indicated no coordination of anhydrous ethanol with the copper ions of [Bmim]2CuC14. The structure of [Bmim]2CuCl4 ionic liquids is maintained as the tetrahedral configuration in presence of ethanol. Therefore, anhydrous ethanol causes little variation in the structure of ionic liquids and it is a good solvent for the dilution of ionic liquids.展开更多
文摘目的比较关节镜下H-Loop无结双排技术与缝线桥技术修复L型肩袖撕裂的临床疗效。方法回顾性分析2019年1至2021年12月于中山大学孙逸仙纪念医院接受关节镜下修复L型肩袖损伤的患者58例。采用关节镜下H-Loop无结双排技术16例,男8例、女8例,年龄(63.69±8.78)岁(范围50~74岁);采用关节镜下缝线桥技术42例,男24例、女18例,年龄(61.02±7.02)岁(范围50~73岁)。观察指标包括美国肩肘外科协会(American Shoulder and Elbow Surgeons,ASES)评分、美国加州大学洛杉矶分校(University of California Los Angeles)肩关节功能评分、Constant-Murley评分、简单肩关节功能检查(simple shoulder test,SST)评分、肩关节活动度及肌力。结果两组患者均获得随访,H-Loop组患者随访时间为(12.81±0.98)个月,缝线桥组为(13.29±0.94)个月。两组患者的年龄、性别、优势手、术前症状时间、撕裂形状、撕裂大小和肱二头肌长头腱切断等因素的差异无统计学意义(P>0.05)。H-Loop组患者手术时间为(67.50±16.02)min,较缝线桥组的(76.67±13.19)min更短,差异有统计学意义(t=2.234,P=0.031);锚钉数量(2.00±0)个,较缝线桥组的(4.14±0.35)个更少,差异有统计学意义(t=16.573,P<0.001)。H-Loop组和缝线桥组ASES评术前分别为(57.44±15.91)分和(58.21±16.58)分,术后1年提高至(92.00±4.41)分和(87.71±6.19)分,手术前后的差异有统计学意义(F=53.439,P<0.001;F=72.511,P<0.001);UCLA评分术前分别为(20.63±3.79)分和(20.83±5.78)分,术后1年提高至(31.56±3.65)分和(30.36±4.71)分,手术前后的差异有统计学意义(F=57.788,P<0.001;F=50.043,P<0.001);Constant-Murley评分术前分别为(68.50±15.31)分和(66.21±16.51)分,术后1年提高至(87.5±8.70)分和(86.33±9.14)分,手术前后的差异有统计学意义(F=6.733,P<0.001;F=30.173,P<0.001);SST评分术前分别为(6.38±3.76)分和(6.55±3.31)分,术后1年提高至(9.06±2.59)分和(9.17±2.45)分,手术前后的差异有统计学意义(F=2.847,P<0.001;F=11.096,P<0.001)。H-Loop组和缝线桥组肩关节前屈活动度分别从术前158.75°±21.25°和139.29°±45.12°,提高至术后1年的178.75°±47.07°和179.76°±3.42°,差异有统计学意义(t=3.814,P=0.002;t=5.877,P<0.001);肩关节外展活动度分别从术前145°±45.46°和135.24°±47.07°,提高至术后1年的178.75°±3.42°和179.76°±1.54°,组间差异无统计学意义(t=2.952,P=0.001;t=6.185,P<0.001)。H-Loop组和缝线桥组肩关节肌力分别从术前(53.36±25.21)N和(43.31±24.49)N,提高至术后1年的(73.69±24.09)N和(61.8±30.07)N,组间差异有统计学意义(t=4.916,P<0.001;t=5.623,P<0.001)。术后1年H-Loop组ASES评分为(92.00±4.41)分高于缝线桥组的(87.71±6.19)分,差异有统计学意义(t=2.529,P=0.014);UCLA评分、Constant-Murley评分、SST评分、肩关节活动度和肌力的组间差异均无统计学意义(P>0.05)。结论H-Loop无结双排技术能获得良好的早期疗效;与传统缝线桥技术相比,术后早期的ASES评分较高,同时具有手术时间短、锚钉应用少的优势。
基金Supported by the Special Fund for the Cultivation of Outstanding Young Scientific and Technological Talents(2015-2018)~~
文摘Unmanned aerial vehicle technology was used to survey the vegetation coverage of typical urban-rural fringe, and descriptive statistics and geostatistical methods were used to analyze the urban-rural fringe of spatial heterogeneity of vegetation coverage. The results showed that vegetation coverage in the study area was 27.2176% with the coefficient of variation of 31.7786%; that the vegetation coverage in separation distance of 〈0.18＇ showed positive spatial correlation, and the spatial correlation of vegetation coverage in separation distance of 〈0.18＇ was greater than that in 〉0.18＇; that the best fitting model for Semivariance function was exponential model with spatial variation ratio 0.726, which showed strong spatial correlation, and the spatial correlated scale was 0.18＇; that the vegetation coverage data in the study area was relatively stable, and the instability mainly occurred on the border of the study area and the surroundings.
基金supported by the National Natural Science Foundation of China under Grant No.61571350Key Research and Development Program of Shaanxi(Contract No.2017KW-004,2017ZDXM-GY-022)the 111 Project(B08038)
文摘The recent advances in wireless communication technology enable high-speed vehicles to download data from roadside units(RSUs). However, the data download volume of individual vehicle is rather restricted due to high mobility and limited transmission range of vehicles, bringing users poor performance. To address this issue, we exploit the combination of both clustering and carry-and-forward schemes in this paper. Our scheme coordinates the cooperation of multiple infrastructures, cluster formation in the same direction and data forwarding of reverse vehicles to facilitate the target vehicle to download large-size content in dark areas. The process of data dissemination and achievable data download volume are then derived and analyzed theoretically. Finally, we conduct extensive simulations to verify the performance of the proposed scheme. Results show significant benefits of the proposed scheme in terms of increasing data download volume and throughput.
基金The project supported by National Natural Science Foundation of China under Grant No.10575017
文摘We present a controlled secure quantum communication protocol using non-maximally （pure） entangled W states first, and then discuss the basic requirements for a real quantum communication. We show that the authorized two users can exchange their secret messages with the help of the controller after purifying the non-maximally entangled states quantum channel unconditionally securely and simultaneously. Our quantum communication protocol seems even more feasible within present technologies.
文摘IEEE802.15.4 is the communication protocol meeting the requirements of short distance and low transmission rate, and achieving the objective of low power. The technique is an emerging wireless communication standard. It is a two-way wireless communication technology with short distance, low complexity, low power consumption and low data transmission rate and low cost. The paper analyzes the features, framework, performance indicators and overall hardware platform structure of JN5121 chip which is used in JENNIC Corporation. And the paper researches the characteristics of actual oroducts for project development.
基金Ministry of Education-Singapore(MOE)(MOE 2016-T2-1-128)Agency for Science,Technology and Research(A*STAR)(1426500050)+2 种基金National Research Foundation Singapore(NRF)(NRF-CRP18-2017-02)Engineering and Physical Sciences Research Council(EPSRC)(EP/P021859/1)Royal Society and Wolfson Foundation
文摘We demonstrate terahertz(THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of a THz quantum cascade laser. Multiple emission peaks are observed within a frequency range corresponding to the bandgap of a periodic counterpart with no disorder, indicating the presence of mode localization aided by Bragg scattering. Simulations and experimental measurements provide strong evidence for the spatial localization of the THz laser modes.
基金supported by the National Natural Science Foundation of China(11079007,21306220)
文摘The structure of [Bmim]2CuCl4 ionic liquids （Bmim： 1-butyl-3-methylimidazolium） with different ratios of H2O and C2H5OH was investigated using X-ray absorption fine structure （XAFS） technique. In this study, XAFS was employed to directly probe the conformational variations of copper ions in [Bmim]2CuCl4 with the addition of either water or ethanol. XAFS analysis confirmed that the structure of ionic liquids gradually transformed from tetrahedral to octahedral configuration with the increase in ratio of H2O. Our results also showed that water molecules coordinated with the copper ions of [Bmim]2CuCl4, leading to the conformational change in ionic liquids. However, the XAFS spectra of [Bmim]zCuCIa/C2H5OH indicated no coordination of anhydrous ethanol with the copper ions of [Bmim]2CuC14. The structure of [Bmim]2CuCl4 ionic liquids is maintained as the tetrahedral configuration in presence of ethanol. Therefore, anhydrous ethanol causes little variation in the structure of ionic liquids and it is a good solvent for the dilution of ionic liquids.
