Backgrounds: The treatment of choice has been drainage and definitive surgical treatment after an interval for acute pilonidal sinus abscess till now. Because of the high incidence of chronic pilonidal sinus disease f...Backgrounds: The treatment of choice has been drainage and definitive surgical treatment after an interval for acute pilonidal sinus abscess till now. Because of the high incidence of chronic pilonidal sinus disease following drainage and aiming the cure in one step, synchronous treatment choices to drainage have been attempted recently. We analyzed retrospectively 20 patients with pilonidal sinus abscess on whom we carried out drainage+ marsupialization as singlestep treatment. Methods: Drainage+ synchronous marsupialization results of 20 patients (17 male, 3 female) between 20 to 37 years of age (mean 28) were analyzed retrospectively on the parameters of operation time, recovery period, time to workreturn and recurrence ratios. Results Operation times were between 15 to 25 minutes. Mean recovery period was 45 days (3050 days), the mean period from operation to workreturn was 24 (2230) days. There were full recovery in 18 patients (90%) and recurrence in 2 patients (10%). Silver nitrate ablation treatment achieved cure in recurrences. Conclusion: Drainage+ Marsupialization is an applicable and successful combined choice in the treatment of Pilonidal sinus abscess.展开更多
The conflict among water drainage, water supply and eco-environment protection is getting more and more serious due to the irrational drainage and exploitation of ground water resources in coal-accumulated basins of N...The conflict among water drainage, water supply and eco-environment protection is getting more and more serious due to the irrational drainage and exploitation of ground water resources in coal-accumulated basins of North China. Efficient solutions to the conflict are to maintain long-term dynamic balance between input and output of the ground water basins, and to try to improve resourcification of the mine water. All solutions must guarantee the eco-environment quality. This paper presents a new idea of optimum combination of water drainage, water supply and eco-environment protection so as to solve the problem of unstable mine water supply, which is caused by the changeable water drainage for the whole combination system. Both the management of hydraulic techniques and constraints in economy, society, ecology, environment, industrial structural adjustments and sustainable developments have been taken into account. Since the traditional and separate management of different departments of water drainage, water supply and eco-environment protection is broken up, these departments work together to avoid repeated geological survey and specific evaluation calculations so that large amount of national investment can be saved and precise calculation for the whole system can be obtained. In the light of the conflict of water drainage, water supply and eco-environment protection in a typical sector in Jiaozuo coal mine, a case study puts forward an optimum combination scheme, in which a maximum economic benefit objective is constrained by multiple factors. The scheme provides a very important scientific base for finding a sustainable development strategy.展开更多
The geological condition of coalfield is much complex in China. With increasing in mining depth and drainage amount, the contradiction of drainage, water supply and environ-mental protection is becoming more and more ...The geological condition of coalfield is much complex in China. With increasing in mining depth and drainage amount, the contradiction of drainage, water supply and environ-mental protection is becoming more and more serious. However, the contradiction can be solved by the scientific management of optimizing combination of drainage, water supply and environ-mental protection. The Philip multiple objectives simplex method used in this article has searched for a possible solution at the first step, and then it goes on searching to find out whether there is a weight number that can lead the solution to the biggest. It can reduce the randomness and diffi-culty of traditional weight method which determine the weight number artificially. Some beneficial coefficients are vague and the number is larger in the model of water resource dispatch. So the vague layer analysis method can consider these vague factors fully, combining the qualitative and quantitative analysis together. Especially, this method can quantify the experiential judge-ment of policy decider, and it will turn to be more suitable if the structure of objective factors is complex or the necessary data are absent. In the paper, the two methods above are used to solve the plans of drainage, water supply and optimizing distribution of water resource in the Zhengzhou mining district.展开更多
文摘Backgrounds: The treatment of choice has been drainage and definitive surgical treatment after an interval for acute pilonidal sinus abscess till now. Because of the high incidence of chronic pilonidal sinus disease following drainage and aiming the cure in one step, synchronous treatment choices to drainage have been attempted recently. We analyzed retrospectively 20 patients with pilonidal sinus abscess on whom we carried out drainage+ marsupialization as singlestep treatment. Methods: Drainage+ synchronous marsupialization results of 20 patients (17 male, 3 female) between 20 to 37 years of age (mean 28) were analyzed retrospectively on the parameters of operation time, recovery period, time to workreturn and recurrence ratios. Results Operation times were between 15 to 25 minutes. Mean recovery period was 45 days (3050 days), the mean period from operation to workreturn was 24 (2230) days. There were full recovery in 18 patients (90%) and recurrence in 2 patients (10%). Silver nitrate ablation treatment achieved cure in recurrences. Conclusion: Drainage+ Marsupialization is an applicable and successful combined choice in the treatment of Pilonidal sinus abscess.
文摘The conflict among water drainage, water supply and eco-environment protection is getting more and more serious due to the irrational drainage and exploitation of ground water resources in coal-accumulated basins of North China. Efficient solutions to the conflict are to maintain long-term dynamic balance between input and output of the ground water basins, and to try to improve resourcification of the mine water. All solutions must guarantee the eco-environment quality. This paper presents a new idea of optimum combination of water drainage, water supply and eco-environment protection so as to solve the problem of unstable mine water supply, which is caused by the changeable water drainage for the whole combination system. Both the management of hydraulic techniques and constraints in economy, society, ecology, environment, industrial structural adjustments and sustainable developments have been taken into account. Since the traditional and separate management of different departments of water drainage, water supply and eco-environment protection is broken up, these departments work together to avoid repeated geological survey and specific evaluation calculations so that large amount of national investment can be saved and precise calculation for the whole system can be obtained. In the light of the conflict of water drainage, water supply and eco-environment protection in a typical sector in Jiaozuo coal mine, a case study puts forward an optimum combination scheme, in which a maximum economic benefit objective is constrained by multiple factors. The scheme provides a very important scientific base for finding a sustainable development strategy.
文摘The geological condition of coalfield is much complex in China. With increasing in mining depth and drainage amount, the contradiction of drainage, water supply and environ-mental protection is becoming more and more serious. However, the contradiction can be solved by the scientific management of optimizing combination of drainage, water supply and environ-mental protection. The Philip multiple objectives simplex method used in this article has searched for a possible solution at the first step, and then it goes on searching to find out whether there is a weight number that can lead the solution to the biggest. It can reduce the randomness and diffi-culty of traditional weight method which determine the weight number artificially. Some beneficial coefficients are vague and the number is larger in the model of water resource dispatch. So the vague layer analysis method can consider these vague factors fully, combining the qualitative and quantitative analysis together. Especially, this method can quantify the experiential judge-ment of policy decider, and it will turn to be more suitable if the structure of objective factors is complex or the necessary data are absent. In the paper, the two methods above are used to solve the plans of drainage, water supply and optimizing distribution of water resource in the Zhengzhou mining district.
