Coal mining activity is often restricted by geologic structural conditions, so it is very important to know the distribution situation of mine structures in advance of mining. For this reason, traditional qualitative ...Coal mining activity is often restricted by geologic structural conditions, so it is very important to know the distribution situation of mine structures in advance of mining. For this reason, traditional qualitative procedure must give way to quantitative prediction method backed by mathematics theory and computer technology. This paper explores some relevant problems with the method, introducing a software, MSPS, used to predict automatically and quantitatively the relative complexities of geologic structures in different blocks of a coal mining area, with an application example employing the software to select the most suitable mining sites.展开更多
Objective： To define the preoperative and intraoperative variables which may affect the immediate postoperative outcome in surgically managed patients with unstable pelvic fractures. Methods： This study was perform...Objective： To define the preoperative and intraoperative variables which may affect the immediate postoperative outcome in surgically managed patients with unstable pelvic fractures. Methods： This study was performed prospectively from January 2009 to June 2011 on 36 consecutive patients admitted to the trauma ward of Postgraduate Institute of Medical Education and Research, Chandigarh, with unstable pelvic injuries. Results： In the present study of 36 patients, 29 were managed surgically. Surgical duration was 2 hours in pa- tients operated on within 1 week and 3.4 hours in those operated on after 1 week. The blood loss was 550 ml when surgery was done after a week, but when done within a week it was 350 ml. The average blood loss through Pfanenstial approach was 360 ml, through posterior approach was 408 ml and through combined approach was 660 ml which was significantly high. Conclusion： Anterior approach to the pelvis would cause significantly more amount of blood loss than poste- rior approach and extemal fixation. Surgical approaches do not have any influence on the surgical duration or the infec- tion rate. The blood loss significantly increases when the surgical time is more than 1 h. The infection rate is not influ- enced by the duration of surgery. Presence or absence of associated injuries to the head, chest or abdomen is the main determinants of patient＇s survival and it greatly influ- ences the duration of hospital stay.展开更多
文摘Coal mining activity is often restricted by geologic structural conditions, so it is very important to know the distribution situation of mine structures in advance of mining. For this reason, traditional qualitative procedure must give way to quantitative prediction method backed by mathematics theory and computer technology. This paper explores some relevant problems with the method, introducing a software, MSPS, used to predict automatically and quantitatively the relative complexities of geologic structures in different blocks of a coal mining area, with an application example employing the software to select the most suitable mining sites.
文摘Objective： To define the preoperative and intraoperative variables which may affect the immediate postoperative outcome in surgically managed patients with unstable pelvic fractures. Methods： This study was performed prospectively from January 2009 to June 2011 on 36 consecutive patients admitted to the trauma ward of Postgraduate Institute of Medical Education and Research, Chandigarh, with unstable pelvic injuries. Results： In the present study of 36 patients, 29 were managed surgically. Surgical duration was 2 hours in pa- tients operated on within 1 week and 3.4 hours in those operated on after 1 week. The blood loss was 550 ml when surgery was done after a week, but when done within a week it was 350 ml. The average blood loss through Pfanenstial approach was 360 ml, through posterior approach was 408 ml and through combined approach was 660 ml which was significantly high. Conclusion： Anterior approach to the pelvis would cause significantly more amount of blood loss than poste- rior approach and extemal fixation. Surgical approaches do not have any influence on the surgical duration or the infec- tion rate. The blood loss significantly increases when the surgical time is more than 1 h. The infection rate is not influ- enced by the duration of surgery. Presence or absence of associated injuries to the head, chest or abdomen is the main determinants of patient＇s survival and it greatly influ- ences the duration of hospital stay.
