AIM: Subclinical hepatic encephalopathy (SHE) is a common complication of liver diseases. The aim of this study was to find out the normal value of psychometric test and to investigate the prevalence of SHE in Chinese...AIM: Subclinical hepatic encephalopathy (SHE) is a common complication of liver diseases. The aim of this study was to find out the normal value of psychometric test and to investigate the prevalence of SHE in Chinese patients with stabilized hepatic cirrhosis.METHODS: Four hundred and nine consecutive cirrhotic patients without overt clinical encephalopathy were screened for SHE by using number connection test part A (NCT-A) and symbol digit test (SDT). SHE was defined as presence of at least one abnormal psychometric test. The age-corrected normal values were defined as the mean±2times standard deviation (2SD), and developed in 356 healthypersons as normal controls. Four hundred and sixteen patients with chronic viral hepatitis were tested as negative controls to assess the diagnostic validity of this test battery.RESULTS: There was no significant difference in NCT scores and SDT quotients between healthy controls and chronic hepatitis group (P>0.05). In all age subgroups,the NCT and SDT measurements of cirrhotic patients differed significantly from those of the controls (P<0.05).When mean±2SD of SDT and NCT measurements from healthy control group was set as the normal range, 119 cirrhotic patients (29.1%) were found to have abnormal NCT-A and SDT tests, 53 (13.0%) were abnormal only in SDT and 36 (8.8%) only in NCT-A. Taken together, SHE was diagnosed in 208 (50.9%) cirrhotic patients by this test battery. The prevalence of SHE increased from 39.9% and 55.2% in Child-Pugh's grade A and B groups to 71.8% in Child-Pugh's grade C group (P<0.05). After the adjustment of age and residential areas required from the tests, no correlation was found in the rate of SHE and causes of cirrhosis, education level and smoking habit.CONCLUSION: Psychometric tests are simple and reliable indicators for screening SHE among Chinese cirrhotic patients. By using a NCT and SDT battery, SHE could be found in 50.9% of cirrhotic patients without overt clinical encephalopathy. The prevalence of SHE is significantly correlated with the severity of liver functions.展开更多
SVM (support vector machines) have become an increasingly popular tool for machine learning tasks involving classification,regression or novelty detection.In particular,they exhibit good generalization performance on ...SVM (support vector machines) have become an increasingly popular tool for machine learning tasks involving classification,regression or novelty detection.In particular,they exhibit good generalization performance on many real issues and the approach is properly motivated theoretically.There are relatively a few free parameters to adjust and the architecture of the learning machine does not need to be found by experimentation.In this paper,survey of the key contents on this subject,focusing on the most well-known models based on kernel substitution,namely SVM,as well as the activated fields at present and the development tendency,is presented.展开更多
The formation mechanism for the octahedral central structure of the He7^+ cluster is proposed and its total energy curve is calculated by the method of a modified arrangement channel quantum mechanics (MACQM). The ene...The formation mechanism for the octahedral central structure of the He7^+ cluster is proposed and its total energy curve is calculated by the method of a modified arrangement channel quantum mechanics (MACQM). The energy is a function of separation R between two nuclei at the center and an apex of the octahedral central structure. The result of the calculation shows that the curve has a minimM energy -19.7296 a.u. at R = 2.40α0. The binding energy of He7^+ with respect to He^+ +6He was calculated to be 0.6437 a.u. This means that the duster of He7^+ may be formed in the stable octahedral central structure with R=2.40 α0.展开更多
The formation mechanism for the icosahedral central structure of the He1+13 cluster is proposed and its total energy curve is calculated by the method of a Modified Arrangement Channel Quantum Mechanics. The energy is...The formation mechanism for the icosahedral central structure of the He1+13 cluster is proposed and its total energy curve is calculated by the method of a Modified Arrangement Channel Quantum Mechanics. The energy is the function of separation R between two nuclei at the center and an apex of the icosahedral central structure. The result of the calculation has shown that the curve has a minimal energy -37.5765 (a.u.) at R = 2.70ao. The binding energy of He+13 with respect to He+ + 12He was calculated to be 1.4046 a.u. This means that the cluster of He+13 may be formed in an icosahedral central structure with strong binding energy.展开更多
The formation mechanism for the body-centered cubic structure of cluster is proposed and its total energy curve is calculated by the method of a Modified Arrangement Channel Quantum Mechanics. The energy is the funct...The formation mechanism for the body-centered cubic structure of cluster is proposed and its total energy curve is calculated by the method of a Modified Arrangement Channel Quantum Mechanics. The energy is the function of separation R between the nuclei at the center and an apex of the body-centered cubic structure. The result of the calculation shows that the curve has a minimal energy . The binding energy of with respect to was calculated to be 0.8857 a.u. This means that the cluster ofmay be formed in the body-centered cubic structure of .展开更多
The effects of a PSP producing dinoflagellate Alexandrium tamarense on marine bivalvesat their several important life stages: egg, D- shape larva, eyespot larva, juvenile and adult, were studied. The results show that...The effects of a PSP producing dinoflagellate Alexandrium tamarense on marine bivalvesat their several important life stages: egg, D- shape larva, eyespot larva, juvenile and adult, were studied. The results show that the hatching, survival, activity, filtration and growth were adversely affected by the alga and the impact was significantly increased with the increase of algal density. The inhibitory effect on egg hatching was most significant, which the hatching rate was only 30% of the control when exposed to the alga at 100 cell/cm3 after 36 h. Further experiments show that the algal culture, re-suspended cells and cell fragments had the inhibitory effect, while no such effect was from the cell-free medium, cell contents and standard STX. The results indicate that the alga could produce unknown toxins, rather than PSP, associated with the cell surface.展开更多
Considering that the equilateral triangle structure of H3- cluster can be formed from the interaction of H- with two hydrogen atoms, a modified arrangement channel quantum mechanics method has been used to calculate t...Considering that the equilateral triangle structure of H3- cluster can be formed from the interaction of H- with two hydrogen atoms, a modified arrangement channel quantum mechanics method has been used to calculate the total energy curve for this structure. The result shows that the curve has a minimal energy -1.6672 a.u. at an internuclear distance of 1.77a0, so its dissociation energy (binding energy) is D(H- + H+ H) = 0.1395 a.u. This means that the cluster H3- may be formed in an equilateral triangle structure with a bond length of 1.77a0.展开更多
As one of the interesting optical techniques for measurements of the velocity,the spatial filtering method is treated briefly in this paper.We shown theoretical analysis and calculation of spatial filtering velocimetr...As one of the interesting optical techniques for measurements of the velocity,the spatial filtering method is treated briefly in this paper.We shown theoretical analysis and calculation of spatial filtering velocimetry,and discussed two-dimensional measurements of the velocity.About the data processing,we used A/D conversion and interfaced with a microcomputer,so that the data can be processed automatically by the microcomputer.The preliminary experiment was performed and the experimental results show the usefulness of the present method for measurements of the velocity.展开更多
The optimized geometries at the RHF/6-311++G** level, the relatively stable energy at the MPW1PW91/6-311++G** level and the structural characters of anions have been acquired, indicating the stability is related to ...The optimized geometries at the RHF/6-311++G** level, the relatively stable energy at the MPW1PW91/6-311++G** level and the structural characters of anions have been acquired, indicating the stability is related to the chemical bonding of μ2?P atoms and the distri- bution of negative charges. The configurations of cage units P8 4- and P9 5- are stable due to the less torsion, but their ES values are relatively higher than that of P7 3- with more μ2?P atoms and the isolated stability is lower than that of P7 . They potentially play an important role as intermediate 3- in chemical reaction of producing complicated polyphosphides. Based on the related electronic properties, a stable polyanion must have low valence electron concentration, no (μ2?P)?(μ2?P) bond and a little dispersive charge. The earmark IR frequencies of cage units have been assigned to the vibration models in the end.展开更多
The microwave technology was introduced for the desulfurization of diesel fuel. The atmosphericsecond side-cut diesel fraction, which was supplied by Liaohe Petrochemical Company, was desulfurized by anoxidation proce...The microwave technology was introduced for the desulfurization of diesel fuel. The atmosphericsecond side-cut diesel fraction, which was supplied by Liaohe Petrochemical Company, was desulfurized by anoxidation process under microwave irradiation. Hydrogen peroxide (H2O2), can oxidize the sulfur compounds indiesel fuel selectively and convert them into sulfones. Based on the rule of dissolution by similar substances,these sulfones are removed from diesel fuel because they could be dissolved in solvent phase. So the sulfurcontent of diesel fuel is decreased. The influence of the concentration of oxidizing reagent, solvent phase to oilphase volume ratio (S/O), irradiation pressure, irradiation time, and the irradiation power have been investigated.The optimum conditions for the refining process was determined. The sulfur removal rate was 59.7% under theoptimum conditions of 8%H2O2, S/O=0.25, 0.05MPa, 6 min, and 375W, respectively. When no microwave irradia-tion was applied, the removal rate was 11.5% only.展开更多
Using internal by two-photon induced light absorption of semiconductor material to lengthen the pulses of Q-switched lasers is discussed. The rate equations are solved and the experiments are performed with a rotating...Using internal by two-photon induced light absorption of semiconductor material to lengthen the pulses of Q-switched lasers is discussed. The rate equations are solved and the experiments are performed with a rotating prism Q-switched ruby laser with a CdS sample in its cavity. As predicted by the theory,the output intensity and output energy both are decreased and pulse length is increased as compared with the normal Q-switched case.展开更多
In the spring of 1988, we discovered some male sterile plants with high seed-setting rates in two lines from the F7 of cross, Fan 4 / Zhongdan 2 // Zhenshan 97, at Hainan Province, South China. At first, these plants ...In the spring of 1988, we discovered some male sterile plants with high seed-setting rates in two lines from the F7 of cross, Fan 4 / Zhongdan 2 // Zhenshan 97, at Hainan Province, South China. At first, these plants were suspected to be photoperiod sensitive male sterile plants, Through observation in several generations,展开更多
Objective: to study the effect of comprehensive rehabilitation nursing of traditional Chinese medicine on the nursing of patients with acute stroke. Methods: 92 patients with acute stroke from January 2021 to January ...Objective: to study the effect of comprehensive rehabilitation nursing of traditional Chinese medicine on the nursing of patients with acute stroke. Methods: 92 patients with acute stroke from January 2021 to January 2022 were divided into observation group and control group, with an average of 46 patients. According to TCM comprehensive nursing and routine nursing intervention, the effects were compared. Results: ① before nursing, there was no significant difference in FMA score and NHISS score between the two groups (P > 0.05). After nursing, the improvement of FMA score and NHISS score in the observation group was better than that in the control group, with statistical difference (P < 0.05);② the incidence of complications in the observation group (5 cases, accounting for 10.87%) was lower than that in the control group (13 cases, accounting for 28.26%), with statistical difference (P < 0.05);③ the satisfaction of the observation group (41 cases, accounting for 89.13%) was higher than that of the control group (33 cases, accounting for 71.74%), with statistical difference (P < 0.05). Conclusion: comprehensive rehabilitation nursing of traditional Chinese medicine can promote the rehabilitation of patients with acute stroke, reduce the complications of the body and improve the satisfaction, which is worthy of recommendation.展开更多
Objective: to further study and explore the practical clinical significance of prenatal diagnosis of fetal abnormalities by B-ultrasound. Methods: the study was started with 100 parturients who underwent B-ultrasound ...Objective: to further study and explore the practical clinical significance of prenatal diagnosis of fetal abnormalities by B-ultrasound. Methods: the study was started with 100 parturients who underwent B-ultrasound prenatal examination in our hospital from January 2019 to December 2020 as the main experimental target. 50 pregnant women who underwent postpartum B-ultrasound examination were taken as the control group and 50 pregnant women who underwent prenatal B-ultrasound examination were taken as the experimental group. Comparing the abnormal rate of fetus, delivery outcome (natural delivery rate, abortion rate, macrosomia rate, stillbirth rate) and overall satisfaction results of the two groups of pregnant women after delivery to judge the practical significance of prenatal B-ultrasound examination;Results: in the control group, the spontaneous delivery rate, abortion rate, macrosomia rate, stillbirth rate and abnormal delivery rate were 82.0%, 6.0%, 8.0%, 4.0% and 12.0% respectively. Among them, 1 case of limb malformation, 2 cases of polycystic kidney, 2 cases of hydrocephalus, 1 case of spina bifida, the overall satisfaction rate reached 90.0 ℅. In the experimental group, the natural delivery rate, abortion rate, macrosomia rate, stillbirth rate and abnormal delivery rate of pregnant women reached 94.0℅, 2.0℅, 4.0℅, 0.0℅ and 4.0℅ respectively. Among them, 0 cases of limb malformation, 1 case of polycystic kidney, 1 case of hydrocephalus, 0 cases of spina bifida, the overall satisfaction rate reached 96.0℅;Conclusion: the implementation of B-ultrasound prenatal examination has a significant positive effect on pregnant women's delivery outcome, fetal abnormality rate and overall satisfaction. We should gradually expand the field of B-ultrasound prenatal examination, and constantly improve the means of B-ultrasound prenatal examination. It plays an important role in improving the overall satisfaction of pregnant women and the delivery outcome, and reducing the abnormal rate of fetus. It is worthy of popularization and application.展开更多
基金Supported by Research Funds from Guangzhou Medical College,and Bureau of Public Health of Guangdong Province,China
文摘AIM: Subclinical hepatic encephalopathy (SHE) is a common complication of liver diseases. The aim of this study was to find out the normal value of psychometric test and to investigate the prevalence of SHE in Chinese patients with stabilized hepatic cirrhosis.METHODS: Four hundred and nine consecutive cirrhotic patients without overt clinical encephalopathy were screened for SHE by using number connection test part A (NCT-A) and symbol digit test (SDT). SHE was defined as presence of at least one abnormal psychometric test. The age-corrected normal values were defined as the mean±2times standard deviation (2SD), and developed in 356 healthypersons as normal controls. Four hundred and sixteen patients with chronic viral hepatitis were tested as negative controls to assess the diagnostic validity of this test battery.RESULTS: There was no significant difference in NCT scores and SDT quotients between healthy controls and chronic hepatitis group (P>0.05). In all age subgroups,the NCT and SDT measurements of cirrhotic patients differed significantly from those of the controls (P<0.05).When mean±2SD of SDT and NCT measurements from healthy control group was set as the normal range, 119 cirrhotic patients (29.1%) were found to have abnormal NCT-A and SDT tests, 53 (13.0%) were abnormal only in SDT and 36 (8.8%) only in NCT-A. Taken together, SHE was diagnosed in 208 (50.9%) cirrhotic patients by this test battery. The prevalence of SHE increased from 39.9% and 55.2% in Child-Pugh's grade A and B groups to 71.8% in Child-Pugh's grade C group (P<0.05). After the adjustment of age and residential areas required from the tests, no correlation was found in the rate of SHE and causes of cirrhosis, education level and smoking habit.CONCLUSION: Psychometric tests are simple and reliable indicators for screening SHE among Chinese cirrhotic patients. By using a NCT and SDT battery, SHE could be found in 50.9% of cirrhotic patients without overt clinical encephalopathy. The prevalence of SHE is significantly correlated with the severity of liver functions.
基金Supported by the National863Plan Foundation of China( 2 0 0 2 AA41 2 0 1 0 )
文摘SVM (support vector machines) have become an increasingly popular tool for machine learning tasks involving classification,regression or novelty detection.In particular,they exhibit good generalization performance on many real issues and the approach is properly motivated theoretically.There are relatively a few free parameters to adjust and the architecture of the learning machine does not need to be found by experimentation.In this paper,survey of the key contents on this subject,focusing on the most well-known models based on kernel substitution,namely SVM,as well as the activated fields at present and the development tendency,is presented.
文摘The formation mechanism for the octahedral central structure of the He7^+ cluster is proposed and its total energy curve is calculated by the method of a modified arrangement channel quantum mechanics (MACQM). The energy is a function of separation R between two nuclei at the center and an apex of the octahedral central structure. The result of the calculation shows that the curve has a minimM energy -19.7296 a.u. at R = 2.40α0. The binding energy of He7^+ with respect to He^+ +6He was calculated to be 0.6437 a.u. This means that the duster of He7^+ may be formed in the stable octahedral central structure with R=2.40 α0.
文摘The formation mechanism for the icosahedral central structure of the He1+13 cluster is proposed and its total energy curve is calculated by the method of a Modified Arrangement Channel Quantum Mechanics. The energy is the function of separation R between two nuclei at the center and an apex of the icosahedral central structure. The result of the calculation has shown that the curve has a minimal energy -37.5765 (a.u.) at R = 2.70ao. The binding energy of He+13 with respect to He+ + 12He was calculated to be 1.4046 a.u. This means that the cluster of He+13 may be formed in an icosahedral central structure with strong binding energy.
基金The project supported by National Natural Science Foundation of China(Grant No.19974027)the Foundation of Sichuan Provincial Education Committee(Grant No.01LB04)
文摘The formation mechanism for the body-centered cubic structure of cluster is proposed and its total energy curve is calculated by the method of a Modified Arrangement Channel Quantum Mechanics. The energy is the function of separation R between the nuclei at the center and an apex of the body-centered cubic structure. The result of the calculation shows that the curve has a minimal energy . The binding energy of with respect to was calculated to be 0.8857 a.u. This means that the cluster ofmay be formed in the body-centered cubic structure of .
基金This study was supported by the National Basic Research Project under contract No.2001CB409709,National Natural Science Foundation of China under contract Nos 49906007,39950001,20177023 and 40076030,CAS Innovation Program under contract No.KZCX2-206,Dire
文摘The effects of a PSP producing dinoflagellate Alexandrium tamarense on marine bivalvesat their several important life stages: egg, D- shape larva, eyespot larva, juvenile and adult, were studied. The results show that the hatching, survival, activity, filtration and growth were adversely affected by the alga and the impact was significantly increased with the increase of algal density. The inhibitory effect on egg hatching was most significant, which the hatching rate was only 30% of the control when exposed to the alga at 100 cell/cm3 after 36 h. Further experiments show that the algal culture, re-suspended cells and cell fragments had the inhibitory effect, while no such effect was from the cell-free medium, cell contents and standard STX. The results indicate that the alga could produce unknown toxins, rather than PSP, associated with the cell surface.
文摘Considering that the equilateral triangle structure of H3- cluster can be formed from the interaction of H- with two hydrogen atoms, a modified arrangement channel quantum mechanics method has been used to calculate the total energy curve for this structure. The result shows that the curve has a minimal energy -1.6672 a.u. at an internuclear distance of 1.77a0, so its dissociation energy (binding energy) is D(H- + H+ H) = 0.1395 a.u. This means that the cluster H3- may be formed in an equilateral triangle structure with a bond length of 1.77a0.
文摘As one of the interesting optical techniques for measurements of the velocity,the spatial filtering method is treated briefly in this paper.We shown theoretical analysis and calculation of spatial filtering velocimetry,and discussed two-dimensional measurements of the velocity.About the data processing,we used A/D conversion and interfaced with a microcomputer,so that the data can be processed automatically by the microcomputer.The preliminary experiment was performed and the experimental results show the usefulness of the present method for measurements of the velocity.
文摘The optimized geometries at the RHF/6-311++G** level, the relatively stable energy at the MPW1PW91/6-311++G** level and the structural characters of anions have been acquired, indicating the stability is related to the chemical bonding of μ2?P atoms and the distri- bution of negative charges. The configurations of cage units P8 4- and P9 5- are stable due to the less torsion, but their ES values are relatively higher than that of P7 3- with more μ2?P atoms and the isolated stability is lower than that of P7 . They potentially play an important role as intermediate 3- in chemical reaction of producing complicated polyphosphides. Based on the related electronic properties, a stable polyanion must have low valence electron concentration, no (μ2?P)?(μ2?P) bond and a little dispersive charge. The earmark IR frequencies of cage units have been assigned to the vibration models in the end.
文摘The microwave technology was introduced for the desulfurization of diesel fuel. The atmosphericsecond side-cut diesel fraction, which was supplied by Liaohe Petrochemical Company, was desulfurized by anoxidation process under microwave irradiation. Hydrogen peroxide (H2O2), can oxidize the sulfur compounds indiesel fuel selectively and convert them into sulfones. Based on the rule of dissolution by similar substances,these sulfones are removed from diesel fuel because they could be dissolved in solvent phase. So the sulfurcontent of diesel fuel is decreased. The influence of the concentration of oxidizing reagent, solvent phase to oilphase volume ratio (S/O), irradiation pressure, irradiation time, and the irradiation power have been investigated.The optimum conditions for the refining process was determined. The sulfur removal rate was 59.7% under theoptimum conditions of 8%H2O2, S/O=0.25, 0.05MPa, 6 min, and 375W, respectively. When no microwave irradia-tion was applied, the removal rate was 11.5% only.
文摘Using internal by two-photon induced light absorption of semiconductor material to lengthen the pulses of Q-switched lasers is discussed. The rate equations are solved and the experiments are performed with a rotating prism Q-switched ruby laser with a CdS sample in its cavity. As predicted by the theory,the output intensity and output energy both are decreased and pulse length is increased as compared with the normal Q-switched case.
文摘In the spring of 1988, we discovered some male sterile plants with high seed-setting rates in two lines from the F7 of cross, Fan 4 / Zhongdan 2 // Zhenshan 97, at Hainan Province, South China. At first, these plants were suspected to be photoperiod sensitive male sterile plants, Through observation in several generations,
文摘Objective: to study the effect of comprehensive rehabilitation nursing of traditional Chinese medicine on the nursing of patients with acute stroke. Methods: 92 patients with acute stroke from January 2021 to January 2022 were divided into observation group and control group, with an average of 46 patients. According to TCM comprehensive nursing and routine nursing intervention, the effects were compared. Results: ① before nursing, there was no significant difference in FMA score and NHISS score between the two groups (P > 0.05). After nursing, the improvement of FMA score and NHISS score in the observation group was better than that in the control group, with statistical difference (P < 0.05);② the incidence of complications in the observation group (5 cases, accounting for 10.87%) was lower than that in the control group (13 cases, accounting for 28.26%), with statistical difference (P < 0.05);③ the satisfaction of the observation group (41 cases, accounting for 89.13%) was higher than that of the control group (33 cases, accounting for 71.74%), with statistical difference (P < 0.05). Conclusion: comprehensive rehabilitation nursing of traditional Chinese medicine can promote the rehabilitation of patients with acute stroke, reduce the complications of the body and improve the satisfaction, which is worthy of recommendation.
文摘Objective: to further study and explore the practical clinical significance of prenatal diagnosis of fetal abnormalities by B-ultrasound. Methods: the study was started with 100 parturients who underwent B-ultrasound prenatal examination in our hospital from January 2019 to December 2020 as the main experimental target. 50 pregnant women who underwent postpartum B-ultrasound examination were taken as the control group and 50 pregnant women who underwent prenatal B-ultrasound examination were taken as the experimental group. Comparing the abnormal rate of fetus, delivery outcome (natural delivery rate, abortion rate, macrosomia rate, stillbirth rate) and overall satisfaction results of the two groups of pregnant women after delivery to judge the practical significance of prenatal B-ultrasound examination;Results: in the control group, the spontaneous delivery rate, abortion rate, macrosomia rate, stillbirth rate and abnormal delivery rate were 82.0%, 6.0%, 8.0%, 4.0% and 12.0% respectively. Among them, 1 case of limb malformation, 2 cases of polycystic kidney, 2 cases of hydrocephalus, 1 case of spina bifida, the overall satisfaction rate reached 90.0 ℅. In the experimental group, the natural delivery rate, abortion rate, macrosomia rate, stillbirth rate and abnormal delivery rate of pregnant women reached 94.0℅, 2.0℅, 4.0℅, 0.0℅ and 4.0℅ respectively. Among them, 0 cases of limb malformation, 1 case of polycystic kidney, 1 case of hydrocephalus, 0 cases of spina bifida, the overall satisfaction rate reached 96.0℅;Conclusion: the implementation of B-ultrasound prenatal examination has a significant positive effect on pregnant women's delivery outcome, fetal abnormality rate and overall satisfaction. We should gradually expand the field of B-ultrasound prenatal examination, and constantly improve the means of B-ultrasound prenatal examination. It plays an important role in improving the overall satisfaction of pregnant women and the delivery outcome, and reducing the abnormal rate of fetus. It is worthy of popularization and application.
