To predict joint development characteristics of coal seams, joint characteristics of rock seams from 88field stations were observed and comparisons were made between joint characteristics of coal and rock seams at 10 ...To predict joint development characteristics of coal seams, joint characteristics of rock seams from 88field stations were observed and comparisons were made between joint characteristics of coal and rock seams at 10 coal outcrops. Additionally, detailed joint measurements of underground coal seams were taken at two coal mines. This study investigated the effects of seam thickness, lithology, and structure on joint development and established the relationship between joint development of coal and rock seams, which allowed predictions of predominant joint densities for the No.5 coal seam in the southeastern margin of the Ordos basin. The results show that outcrop and underground coal seams exhibit the same joint systems as rock seams. The joints are mainly upright. Predominant joints strike 55° on average, followed by joints striking 320°. The joint density of the coal seam is 18.7–22.5 times that of the sandstone seam at the same thickness. The predominant joint density of the No.5 coal seam, controlled by the structure, is 4–20 joints per meter. Joint densities exhibit high values at intersecting areas of faults and folds and decrease values in structurally stable areas. The permeability increases exponentially with increasing density of the predominant joints.展开更多
Promoting the construction of Guangdong-Hong Kong-Macao Greater Bay Area is a major policy decision and national strategy made by the central government of China,which significantly supports the Belt and Road Initiati...Promoting the construction of Guangdong-Hong Kong-Macao Greater Bay Area is a major policy decision and national strategy made by the central government of China,which significantly supports the Belt and Road Initiative and maintains the long-term prosperity for the whole country.As an important part of the Guangdong-Hong Kong-Macao Greater Bay Area,Foshan needs to find its own position and direction in order to accelerate the joint development with other cities through five measures.展开更多
On November 27,2017,under the government cooperation framework of China and Thailand,Beijing Tengyuxinwei Technology Co.,Ltd.（BTTCL）,affiliated to the China Great Wall Industry Corporation（CGWIC）,signed a MOU of‘...On November 27,2017,under the government cooperation framework of China and Thailand,Beijing Tengyuxinwei Technology Co.,Ltd.（BTTCL）,affiliated to the China Great Wall Industry Corporation（CGWIC）,signed a MOU of‘Joint Construction of HONGYAN-SAT Constellation’with Thailand Kasetsart University（KU）.Under this MOU,展开更多
The uncertainty of distributed generation energy has dramatically challenged the coordinated development of distribution networks at all levels.This paper focuses on the multi-time-scale regulation model of distribute...The uncertainty of distributed generation energy has dramatically challenged the coordinated development of distribution networks at all levels.This paper focuses on the multi-time-scale regulation model of distributed generation energy under normal conditions.The simulation results of the example verify the self-optimization characteristics and the effectiveness of real-time dispatching of the distribution network control technology at all levels under multiple time scales.展开更多
The internal development and outsourced development of information systems have been studied intensively, but little research has been conducted on the joint development mode. This paper describes the benefits and pro...The internal development and outsourced development of information systems have been studied intensively, but little research has been conducted on the joint development mode. This paper describes the benefits and problems encountered in the joint development of accounting management information systems based on a real case. The case illustrates some distinct advantages, such as full control over the development schedule, the flexibility with resource allocation, and insurance for sustained active participation by the end-users. However, this development mode also involves potential problems, e.g., potential conflicts arising from diverse backgrounds and cultures of the various stakeholders and challenges to manage personnel from outside partners.展开更多
There is a long tradition of friendly exchange and cooperation between the Chinese Academy of Sciences (CAS) and the universities in Hong Kong. In recent years, both sides have been increasingly realizing the importan...There is a long tradition of friendly exchange and cooperation between the Chinese Academy of Sciences (CAS) and the universities in Hong Kong. In recent years, both sides have been increasingly realizing the importance of furthering their Collaboration and exchange and the cooperation has become more active, laying greater展开更多
目的:探讨髋关节镜治疗临界型髋关节发育不良并髋臼盂唇损伤的临床疗效。方法:回顾性分析2019年12月~2021年12月在广东省中医院诊断为临界型髋关节发育不良(borderline developmental dysplasia of the hip,BDDH)并髋臼盂唇损伤行髋关...目的:探讨髋关节镜治疗临界型髋关节发育不良并髋臼盂唇损伤的临床疗效。方法:回顾性分析2019年12月~2021年12月在广东省中医院诊断为临界型髋关节发育不良(borderline developmental dysplasia of the hip,BDDH)并髋臼盂唇损伤行髋关节镜手术的患者共32例,其中男8例、女24例,年龄39.41±16.27岁(18~59岁),平均髋臼外侧中心边缘角(lateral centre-edge angle,LCEA):21.25°±2.96°(18°~25°)。匹配同期的行髋关节镜手术治疗的髋臼股骨撞击症(femoral acetabular impingement,FAI)患者32例作为对照组,男15例、女17例,年龄42.78±12.18岁(24~70岁),平均LCEA:32.97°±4.96°(26°~42°)。所有患者均采用髋关节镜下盂唇修复、头颈区成形、关节囊缝合术治疗。采用改良Harris髋关节评分(mHHS)、体育运动专用髋关节评分(HOS-SSS)、日常活动的髋关节功能评分(HOS-ADL)、视觉模拟评分(VAS),对患者术前、术后3月、术后12月、术后24月进行功能评分测量。结果:BDDH组和FAI组所有病例均获得随访,随访时间分别为27.6±5.4月、28.3±6.5月。FAI组和BDDH组术前m HHS、HOS-SSS、HOS-ADL和VAS评分的差异无统计学意义(P>0.05)。两组术后3月、12月、24月时mHHS、HOS-SSS、HOS-ADL评分均较术前明显提高,术后VAS评分均较术前明显降低,差异有统计学意义(P<0.001)。在术后3月、12月、24月时BDDH组的m HHS评分均较FAI组低,差异有统计学意义(P<0.05)。在术后3月时BDDH组的HOS-SSS、HOS-ADL分均较FAI组低,差异有统计学意义(P<0.05)。其他随访时间点,两组的各项评分指标无统计学差异(P>0.05)。所有患者在随访期间,均未因症状复发而行再次手术治疗。结论:髋关节镜技术治疗临界发育性髋关节发育不良可获得良好的短期疗效。展开更多
发育性髋关节发育不良(developmental dysplasia of the hip,DDH)是婴幼儿时期常见的骨骼系统疾病之一。DDH在婴幼儿期容易被忽视,如不能及早诊断,错失最佳治疗时机,会影响髋关节功能,难以纠正关节畸形,进而导致终身残疾。目前髋关节超...发育性髋关节发育不良(developmental dysplasia of the hip,DDH)是婴幼儿时期常见的骨骼系统疾病之一。DDH在婴幼儿期容易被忽视,如不能及早诊断,错失最佳治疗时机,会影响髋关节功能,难以纠正关节畸形,进而导致终身残疾。目前髋关节超声检查已成为公认的早期DDH影像学诊断金标准,包括选择性超声筛查模式和普遍性超声筛查模式。近年来,DDH筛查网络体系(即转诊、筛查、确诊、治疗一体化的网络体系)已在中国部分地区实施,可将DDH的初诊时间提前,并保证诊治流程的系统化。人工智能影像技术也逐步应用于婴幼儿DDH的辅助诊断。本文概述了DDH患儿早期接受超声筛查的必要性,并对不同超声筛查技术和国内外筛查模式及体系进行综述,为今后DDH患儿实施有效的髋关节超声筛查和综合干预提供参考。展开更多
基金Financial support for this work, provided by the National Science and Technology Major Project (No. 2011ZX05034-001)
文摘To predict joint development characteristics of coal seams, joint characteristics of rock seams from 88field stations were observed and comparisons were made between joint characteristics of coal and rock seams at 10 coal outcrops. Additionally, detailed joint measurements of underground coal seams were taken at two coal mines. This study investigated the effects of seam thickness, lithology, and structure on joint development and established the relationship between joint development of coal and rock seams, which allowed predictions of predominant joint densities for the No.5 coal seam in the southeastern margin of the Ordos basin. The results show that outcrop and underground coal seams exhibit the same joint systems as rock seams. The joints are mainly upright. Predominant joints strike 55° on average, followed by joints striking 320°. The joint density of the coal seam is 18.7–22.5 times that of the sandstone seam at the same thickness. The predominant joint density of the No.5 coal seam, controlled by the structure, is 4–20 joints per meter. Joint densities exhibit high values at intersecting areas of faults and folds and decrease values in structurally stable areas. The permeability increases exponentially with increasing density of the predominant joints.
文摘Promoting the construction of Guangdong-Hong Kong-Macao Greater Bay Area is a major policy decision and national strategy made by the central government of China,which significantly supports the Belt and Road Initiative and maintains the long-term prosperity for the whole country.As an important part of the Guangdong-Hong Kong-Macao Greater Bay Area,Foshan needs to find its own position and direction in order to accelerate the joint development with other cities through five measures.
文摘On November 27,2017,under the government cooperation framework of China and Thailand,Beijing Tengyuxinwei Technology Co.,Ltd.（BTTCL）,affiliated to the China Great Wall Industry Corporation（CGWIC）,signed a MOU of‘Joint Construction of HONGYAN-SAT Constellation’with Thailand Kasetsart University（KU）.Under this MOU,
文摘The uncertainty of distributed generation energy has dramatically challenged the coordinated development of distribution networks at all levels.This paper focuses on the multi-time-scale regulation model of distributed generation energy under normal conditions.The simulation results of the example verify the self-optimization characteristics and the effectiveness of real-time dispatching of the distribution network control technology at all levels under multiple time scales.
基金Supported partially by the National Natural Science Foundation of China (No. 70671103) a special grant from the Renmin Uni-versity of China
文摘The internal development and outsourced development of information systems have been studied intensively, but little research has been conducted on the joint development mode. This paper describes the benefits and problems encountered in the joint development of accounting management information systems based on a real case. The case illustrates some distinct advantages, such as full control over the development schedule, the flexibility with resource allocation, and insurance for sustained active participation by the end-users. However, this development mode also involves potential problems, e.g., potential conflicts arising from diverse backgrounds and cultures of the various stakeholders and challenges to manage personnel from outside partners.
文摘There is a long tradition of friendly exchange and cooperation between the Chinese Academy of Sciences (CAS) and the universities in Hong Kong. In recent years, both sides have been increasingly realizing the importance of furthering their Collaboration and exchange and the cooperation has become more active, laying greater
文摘发育性髋关节发育不良(developmental dysplasia of the hip,DDH)是婴幼儿时期常见的骨骼系统疾病之一。DDH在婴幼儿期容易被忽视,如不能及早诊断,错失最佳治疗时机,会影响髋关节功能,难以纠正关节畸形,进而导致终身残疾。目前髋关节超声检查已成为公认的早期DDH影像学诊断金标准,包括选择性超声筛查模式和普遍性超声筛查模式。近年来,DDH筛查网络体系(即转诊、筛查、确诊、治疗一体化的网络体系)已在中国部分地区实施,可将DDH的初诊时间提前,并保证诊治流程的系统化。人工智能影像技术也逐步应用于婴幼儿DDH的辅助诊断。本文概述了DDH患儿早期接受超声筛查的必要性,并对不同超声筛查技术和国内外筛查模式及体系进行综述,为今后DDH患儿实施有效的髋关节超声筛查和综合干预提供参考。
