Situs inversus viscerum(SIV)is a rare congenitalcondition characterized by complete transposition of all viscera.This anatomical pathology makes endoscopic retrograde cholangiopancreatography(ERCP)technically difficul...Situs inversus viscerum(SIV)is a rare congenitalcondition characterized by complete transposition of all viscera.This anatomical pathology makes endoscopic retrograde cholangiopancreatography(ERCP)technically difficult.We report a new case of a 70-year-old Chinese male with total SIV who had obstructive jaundice.Magneticresonance cholangiopancreatography demonstrated a number of stones in the gallbladder and common bile duct(CBD).Therapeutic ERCP was performed to relieve biliary obstruction and remove the CBD stones.This procedure started with the patient in a supine position and the endoscopist at the left side of the table.When the papilla was maintained,the patient was repositioned to a prone position and standard endoscopic sphincterotomy and endoscopic papillary balloon dilatation procedures were conducted.ERCP was performed successfully and relevant complications did not occur in this patient.We also present a review of the literature published between 1985 and 2014in the Pub Med and EMBASE databases.There were eight published cases during this period,with one each from America,Finland,India,Italy,South Korea and Pakistan,and two from Spain.Our case is the first reported in China.展开更多
Firstly, the impact of historical earthquakes on 34 China province-level capital cities is evaluated by using historical earthquake catalog. The distribution of affected intensity shows, about 53% of cities have even ...Firstly, the impact of historical earthquakes on 34 China province-level capital cities is evaluated by using historical earthquake catalog. The distribution of affected intensity shows, about 53% of cities have even not been affected by earthquake intensity VI, and 44% of cities have been hit by earthquake intensity VII to IX. For most of the cities, occurrence frequency of affected intensity VI is usually higher than that of affected intensity larger than VI, and the value of affected intensity with maximal occurrence frequency may be very different among cities. So both the maximal affected intensity and the affected intensity with maximal occurrence frequency should be taken into account when the prevention seismic intensity needs to be determined. Secondly, considering the incompleteness of records of historical earthquakes, a method of earthquake catalog computer simulation is introduced to study the features of affected intensity of big cities. 69 county-level cities of Fujian Province are selected to be statistical objects. The statistical result shows, for different risk levels the seismic intensity changes greatly among cities, the seismic intensity of 2% probability of exceedance in 50 years can be regarded as the characteristic affected intensity of city, and can be the basis of determining the city special earthquake prevention level and a proper indicator of future earthquakes impact on cities.展开更多
Introduction With rapid development and advancement of economy and society, lots of city groups or city belts with ex-tra-large cities as their centers have been formed in China. The regions these city groups lie i...Introduction With rapid development and advancement of economy and society, lots of city groups or city belts with ex-tra-large cities as their centers have been formed in China. The regions these city groups lie in usually havewell-developed economy, dense population, and are regional politics and culture centers. Some groups lie in theregions with high level of earthquake activity, such as the Surrounding Capital City Group with the centers of Bei-jing and Tianjin. Once a large earthquake occurs, its influence will spread to very extensive region and its disasterwill be tremendous too. So earthquake resistance and disaster mitigation of city group will be very significant issue.The cities in a group have close distance with each other; they can carry out unified preparation for disaster as onewhole and reduce the heavy load of single city before an earthquake, and have an advantage of prompt mutual-aidafter an earthquake because of close distance. It is especially significant to mitigate the lose of lives. One importantprecondition is that all the cities in one group cannot be exposed to the same level of destroy during one earth-quake. So the division of city group in the region with dense cities distribution shall be very significant to theemergent mutual-aid in early time after a large earthquake. For this goal, the characteristics and correlativity ofearthquake′s impact on cities in one group need to clearly be considered. The cities with similar features and strongcorrelativity of historical earthquake influence have large chance to suffer same level destroy during the futurestrong earthquake and are disadvantage to provide mutual-aid and shall not be divided into one group. ……展开更多
Based on the processing experiment and sodium flame test this paper deals with the relationship between processing parameters, structure, and filtration property of melt blown fabric. Through the image analysis of Que...Based on the processing experiment and sodium flame test this paper deals with the relationship between processing parameters, structure, and filtration property of melt blown fabric. Through the image analysis of Questar micro-images in combination with the SEM observation and the measurement of some macrostructure indices, the relationship between the processing parameters and the structure especially the microstructure is emphasized Finally the effect of somestructure factors on filtration properties is discussed theoretically.展开更多
Summary: The effects of angiotensin Ⅱ receptor antagonist losartan on elastic properties of aorta in patients with mild to moderate essential hypertension were assessed. The ascending aortic distensibility in 26 pat...Summary: The effects of angiotensin Ⅱ receptor antagonist losartan on elastic properties of aorta in patients with mild to moderate essential hypertension were assessed. The ascending aortic distensibility in 26 patients (48±3 years) with mild to moderate essential hypertension before and after 12 weeks of treatment with losartan (50 mg/day) was evaluated by using two-dimensional echocardiography. M-mode measurements of aortic systolic (D s) and diastolic diameter (D d) were taken at a level approximately 3 cm above the aortic valve. Simultaneously, cuff brachial artery systolic (SBP) and diastolic(DBP) pressures were measured. Aortic pressure-strain elastic modulus (E p) was calculated as D d×(SBP-DBP)/(D s-D d)×1333 and stiffness index beta (β) was defined as D d×Ln (SBP/DBP)/(D s-D d). Blood pressure significantly decreased from 148±13/95±9 mmHg to 138±12/88±8 mmHg (systolic blood pressure, P=0.001; diastolic blood pressure, P=0.003). There was no significant difference in pulse pressure before and after treatment with losartan (53±10 mmHg vs 50±7 mmHg). The distensibility of ascending aorta increased significantly as showed by the significant decrease in pressure-strain elastic modulus from 4.42±5.79×10 6 dynes/cm 2 to 1.99±1.49×10 6 dynes/cm 2 (P=0.02) and stiffness index beta from 27.4±32.9 to 13.3±9.9 (P=0.02). Although there was a weak correlation between the percent changes in pressure-strain elastic modulus and stiffness index beta and that in diastolic blood pressure after losartan treatment(r=0.40, P=0.04 and r=0.55, P=0.004, respectively), no correlation was found between the percent changes in pressure-strain elastic modulus and stiffness index beta and that in systolic blood pressure (r=0.04, P=0.8 and r=0.24, P=0.2, respectively). Our study demonstrated that angiotensin Ⅱ receptor antagonist losartan has a beneficial effect on aortic distensibility in patients with mild to moderate essential hypertension and this effect is partly independent of blood pressure reduction.展开更多
The paper presents an efficient stiffness optimization approach to fully isotropic laminates with approximate isotropic behaviors respect toboth extensional and bending stiffnesses. Based on the Integral global minimi...The paper presents an efficient stiffness optimization approach to fully isotropic laminates with approximate isotropic behaviors respect toboth extensional and bending stiffnesses. Based on the Integral global minimization method, the layer orientation angles andthe layer thickness ratios are chosen as design variablesand the lamination parameters are minimized to get theopthnal designs. Example of laminate with approximatefully isotropic behaviors is presented, which has lessthan one-third the number of plies of a fully isotropiclaminate.展开更多
A new method that is applicable to local seismic networks to estimate the azimuth and slowness of teleseismic signals is introduced in the paper. The method is based on the correlation between the arrival times and st...A new method that is applicable to local seismic networks to estimate the azimuth and slowness of teleseismic signals is introduced in the paper. The method is based on the correlation between the arrival times and station positions. The analyzed results indicate that the azimuth and slowness of teleseismic signals can be accurately estimated by the method. Average errors for azimuth and slowness measurements obtained by this method using data of Xian Digital Telemetry Seismic Network are 2.0?and 0.34 s/(?, respectively. The conclusions drawn from this study indicate that this method may be very useful to interpret teleseismic records of local seismic networks.展开更多
Geostrophic adjustment and frontogenesis are examined by means of the 2-D ARPS model. The simulation shows that.without the large-scale forcing,both the frontogenesis and frontolysis are observed during the geostrophi...Geostrophic adjustment and frontogenesis are examined by means of the 2-D ARPS model. The simulation shows that.without the large-scale forcing,both the frontogenesis and frontolysis are observed during the geostrophic adjustment process and the intensity of the front oscillates in the case of no discontinuity.The convergence (divergence) induced by the secondary circulation is the most important factor for frontogenesis (frontolysis) at the top and bottom boundaries.The amplitude and period of oscillation are dependent on the initial atmospheric stratification and the Coriolis frequency,and they are related to the inertio-gravity wave.展开更多
文摘Situs inversus viscerum(SIV)is a rare congenitalcondition characterized by complete transposition of all viscera.This anatomical pathology makes endoscopic retrograde cholangiopancreatography(ERCP)technically difficult.We report a new case of a 70-year-old Chinese male with total SIV who had obstructive jaundice.Magneticresonance cholangiopancreatography demonstrated a number of stones in the gallbladder and common bile duct(CBD).Therapeutic ERCP was performed to relieve biliary obstruction and remove the CBD stones.This procedure started with the patient in a supine position and the endoscopist at the left side of the table.When the papilla was maintained,the patient was repositioned to a prone position and standard endoscopic sphincterotomy and endoscopic papillary balloon dilatation procedures were conducted.ERCP was performed successfully and relevant complications did not occur in this patient.We also present a review of the literature published between 1985 and 2014in the Pub Med and EMBASE databases.There were eight published cases during this period,with one each from America,Finland,India,Italy,South Korea and Pakistan,and two from Spain.Our case is the first reported in China.
文摘Firstly, the impact of historical earthquakes on 34 China province-level capital cities is evaluated by using historical earthquake catalog. The distribution of affected intensity shows, about 53% of cities have even not been affected by earthquake intensity VI, and 44% of cities have been hit by earthquake intensity VII to IX. For most of the cities, occurrence frequency of affected intensity VI is usually higher than that of affected intensity larger than VI, and the value of affected intensity with maximal occurrence frequency may be very different among cities. So both the maximal affected intensity and the affected intensity with maximal occurrence frequency should be taken into account when the prevention seismic intensity needs to be determined. Secondly, considering the incompleteness of records of historical earthquakes, a method of earthquake catalog computer simulation is introduced to study the features of affected intensity of big cities. 69 county-level cities of Fujian Province are selected to be statistical objects. The statistical result shows, for different risk levels the seismic intensity changes greatly among cities, the seismic intensity of 2% probability of exceedance in 50 years can be regarded as the characteristic affected intensity of city, and can be the basis of determining the city special earthquake prevention level and a proper indicator of future earthquakes impact on cities.
文摘Introduction With rapid development and advancement of economy and society, lots of city groups or city belts with ex-tra-large cities as their centers have been formed in China. The regions these city groups lie in usually havewell-developed economy, dense population, and are regional politics and culture centers. Some groups lie in theregions with high level of earthquake activity, such as the Surrounding Capital City Group with the centers of Bei-jing and Tianjin. Once a large earthquake occurs, its influence will spread to very extensive region and its disasterwill be tremendous too. So earthquake resistance and disaster mitigation of city group will be very significant issue.The cities in a group have close distance with each other; they can carry out unified preparation for disaster as onewhole and reduce the heavy load of single city before an earthquake, and have an advantage of prompt mutual-aidafter an earthquake because of close distance. It is especially significant to mitigate the lose of lives. One importantprecondition is that all the cities in one group cannot be exposed to the same level of destroy during one earth-quake. So the division of city group in the region with dense cities distribution shall be very significant to theemergent mutual-aid in early time after a large earthquake. For this goal, the characteristics and correlativity ofearthquake′s impact on cities in one group need to clearly be considered. The cities with similar features and strongcorrelativity of historical earthquake influence have large chance to suffer same level destroy during the futurestrong earthquake and are disadvantage to provide mutual-aid and shall not be divided into one group. ……
文摘Based on the processing experiment and sodium flame test this paper deals with the relationship between processing parameters, structure, and filtration property of melt blown fabric. Through the image analysis of Questar micro-images in combination with the SEM observation and the measurement of some macrostructure indices, the relationship between the processing parameters and the structure especially the microstructure is emphasized Finally the effect of somestructure factors on filtration properties is discussed theoretically.
文摘Summary: The effects of angiotensin Ⅱ receptor antagonist losartan on elastic properties of aorta in patients with mild to moderate essential hypertension were assessed. The ascending aortic distensibility in 26 patients (48±3 years) with mild to moderate essential hypertension before and after 12 weeks of treatment with losartan (50 mg/day) was evaluated by using two-dimensional echocardiography. M-mode measurements of aortic systolic (D s) and diastolic diameter (D d) were taken at a level approximately 3 cm above the aortic valve. Simultaneously, cuff brachial artery systolic (SBP) and diastolic(DBP) pressures were measured. Aortic pressure-strain elastic modulus (E p) was calculated as D d×(SBP-DBP)/(D s-D d)×1333 and stiffness index beta (β) was defined as D d×Ln (SBP/DBP)/(D s-D d). Blood pressure significantly decreased from 148±13/95±9 mmHg to 138±12/88±8 mmHg (systolic blood pressure, P=0.001; diastolic blood pressure, P=0.003). There was no significant difference in pulse pressure before and after treatment with losartan (53±10 mmHg vs 50±7 mmHg). The distensibility of ascending aorta increased significantly as showed by the significant decrease in pressure-strain elastic modulus from 4.42±5.79×10 6 dynes/cm 2 to 1.99±1.49×10 6 dynes/cm 2 (P=0.02) and stiffness index beta from 27.4±32.9 to 13.3±9.9 (P=0.02). Although there was a weak correlation between the percent changes in pressure-strain elastic modulus and stiffness index beta and that in diastolic blood pressure after losartan treatment(r=0.40, P=0.04 and r=0.55, P=0.004, respectively), no correlation was found between the percent changes in pressure-strain elastic modulus and stiffness index beta and that in systolic blood pressure (r=0.04, P=0.8 and r=0.24, P=0.2, respectively). Our study demonstrated that angiotensin Ⅱ receptor antagonist losartan has a beneficial effect on aortic distensibility in patients with mild to moderate essential hypertension and this effect is partly independent of blood pressure reduction.
文摘The paper presents an efficient stiffness optimization approach to fully isotropic laminates with approximate isotropic behaviors respect toboth extensional and bending stiffnesses. Based on the Integral global minimization method, the layer orientation angles andthe layer thickness ratios are chosen as design variablesand the lamination parameters are minimized to get theopthnal designs. Example of laminate with approximatefully isotropic behaviors is presented, which has lessthan one-third the number of plies of a fully isotropiclaminate.
基金Foundation of Verification Researches for Arm Control Technology
文摘A new method that is applicable to local seismic networks to estimate the azimuth and slowness of teleseismic signals is introduced in the paper. The method is based on the correlation between the arrival times and station positions. The analyzed results indicate that the azimuth and slowness of teleseismic signals can be accurately estimated by the method. Average errors for azimuth and slowness measurements obtained by this method using data of Xian Digital Telemetry Seismic Network are 2.0?and 0.34 s/(?, respectively. The conclusions drawn from this study indicate that this method may be very useful to interpret teleseismic records of local seismic networks.
基金This research was supported by the National Natural Science Foundation of China under Grants:49675259 and 49735180The National Key Basic Research Development Program:CHERES
文摘Geostrophic adjustment and frontogenesis are examined by means of the 2-D ARPS model. The simulation shows that.without the large-scale forcing,both the frontogenesis and frontolysis are observed during the geostrophic adjustment process and the intensity of the front oscillates in the case of no discontinuity.The convergence (divergence) induced by the secondary circulation is the most important factor for frontogenesis (frontolysis) at the top and bottom boundaries.The amplitude and period of oscillation are dependent on the initial atmospheric stratification and the Coriolis frequency,and they are related to the inertio-gravity wave.
