In order to study features of rock–water interaction, a self-developed experimental system called Intelligent Testing System for Water Absorption in Deep Soft Rocks(ITSWADSR) was utilized to analyze the hydrophilic b...In order to study features of rock–water interaction, a self-developed experimental system called Intelligent Testing System for Water Absorption in Deep Soft Rocks(ITSWADSR) was utilized to analyze the hydrophilic behaviors of natural soft rock at high stress state. Combining X-ray diffraction and mercury injection test, main influencing factors on hydrophilic characteristics were studied. According to the results, it could be concluded as the following:(1) the effective porosity, and the content of illite, illite/smectite formation(S = 5%) and kaolinite have positive correlation with the water absorption capacity of rock; meanwhile, the initial moisture content, fractal dimension of effective pores, illite/smectite formation(S = 30%) and chlorite present negative correlation;(2) among the positive factors, the ascending order is kaolinite, illite/smectite formation(S = 5%) and illite;(3) the descending order among the negative factors are chlorite, illite/smectite formation(S = 30%) and fractal dimension of the effective pores;(4) influence of effective porosity on the pressurized water absorbing capacity of rock is minimal, while it is maximal in the process of no pressurized water absorption.展开更多
Objective: To evaluate retrospectively the relationshipbetween the types of operation, characteristics of tu-mor, and survival rate after radical pancreatoduo-denectomy for patients with carcinoma of the pancre-atic h...Objective: To evaluate retrospectively the relationshipbetween the types of operation, characteristics of tu-mor, and survival rate after radical pancreatoduo-denectomy for patients with carcinoma of the pancre-atic head performed in recent 30 years.Methods: Of 377 patients with carcinoma of the pan-creas treated during 1970-1999, 75 were subjected toWhipple procedure or pancreatectomy with dissectionof regional lymph nodes (10 patients receiving inter-vention therapy). The latter is beneficial to patientswith carcinoma of the pancreatic head. The operationmay be extended by resection of a segment of superiormensenteric-portal vein confluence if involved.Results: The resection rate was increased from 9% inthe 1970s to 28.2% in the 1990s. The 1-, 3-, 5-year-survival rates were 50%, 25%, 0 in the 1970s;57.1%, 28.5%, 9% in the 1980s; and 61.1%, 27%,11.1% in the 1990s, respectively.Conclusion: Despite its retrospective in nature, thepresent study suggests that in patients with pancreaticcancer without visceral or distant metastasis, resectionshould always be attempted when there is no high op-erative risk factor and the operation is technically fea-sible.展开更多
文摘In order to study features of rock–water interaction, a self-developed experimental system called Intelligent Testing System for Water Absorption in Deep Soft Rocks(ITSWADSR) was utilized to analyze the hydrophilic behaviors of natural soft rock at high stress state. Combining X-ray diffraction and mercury injection test, main influencing factors on hydrophilic characteristics were studied. According to the results, it could be concluded as the following:(1) the effective porosity, and the content of illite, illite/smectite formation(S = 5%) and kaolinite have positive correlation with the water absorption capacity of rock; meanwhile, the initial moisture content, fractal dimension of effective pores, illite/smectite formation(S = 30%) and chlorite present negative correlation;(2) among the positive factors, the ascending order is kaolinite, illite/smectite formation(S = 5%) and illite;(3) the descending order among the negative factors are chlorite, illite/smectite formation(S = 30%) and fractal dimension of the effective pores;(4) influence of effective porosity on the pressurized water absorbing capacity of rock is minimal, while it is maximal in the process of no pressurized water absorption.
文摘Objective: To evaluate retrospectively the relationshipbetween the types of operation, characteristics of tu-mor, and survival rate after radical pancreatoduo-denectomy for patients with carcinoma of the pancre-atic head performed in recent 30 years.Methods: Of 377 patients with carcinoma of the pan-creas treated during 1970-1999, 75 were subjected toWhipple procedure or pancreatectomy with dissectionof regional lymph nodes (10 patients receiving inter-vention therapy). The latter is beneficial to patientswith carcinoma of the pancreatic head. The operationmay be extended by resection of a segment of superiormensenteric-portal vein confluence if involved.Results: The resection rate was increased from 9% inthe 1970s to 28.2% in the 1990s. The 1-, 3-, 5-year-survival rates were 50%, 25%, 0 in the 1970s;57.1%, 28.5%, 9% in the 1980s; and 61.1%, 27%,11.1% in the 1990s, respectively.Conclusion: Despite its retrospective in nature, thepresent study suggests that in patients with pancreaticcancer without visceral or distant metastasis, resectionshould always be attempted when there is no high op-erative risk factor and the operation is technically fea-sible.
