The variation and influence factors of yield gravity center of flue-cured tobacco in Hunan were studied in 2006-2015 by regional gravity center method and grey correlation analysis. The results showed that the yields ...The variation and influence factors of yield gravity center of flue-cured tobacco in Hunan were studied in 2006-2015 by regional gravity center method and grey correlation analysis. The results showed that the yields of flue-cured tobacco in various areas in Hunan were mainly of the growing with fluctuation type. The yield gravity centers in the whole province and eastern, southern and western Hunan tobacco-growing areas overall moved in the north by west, south by west, west by south, and south by east directions, respectively; and the movements in the south-north direction were in order of eastern Hunan tobacco-growing area 〉whole province 〉western Hunan tobacco-growing area 〉southern Hunan tobacco-growing area, and the movements inthe east-west direction showed an order of eastern Hunan tobecco-growing area〉western Hunan tobacco-growing area〉whole province〉 southern Hunan tobacco-growing area. The main influence factors of the coordinates of the longitudes and the latitudes differed. The main influence factor was planting area in most cities or counties in the whole province, and was per unit area yield in a few cities or counties. It is advised to construct the ＂one main body and two wings＂ development pattern of flue-cured tobacco production in Hunan with southern Hunan tobacco-growing area as the main body and western and eastern Hunan tobacco-growing areas as the two wings.展开更多
It is difficult to establish the process of chaos in time series from cardiac dynamics. The output from such a system is probably the result of both its internal dynamics, and the input to the system from its surround...It is difficult to establish the process of chaos in time series from cardiac dynamics. The output from such a system is probably the result of both its internal dynamics, and the input to the system from its surroundings. We present an optimization algorithm to find a time series that is as close as possible to the heart rate series subject to the constraint that it is deterministic with respect to some dynamics. The algorithm is tested by some famous forced dynamical systems, and applied to heart rate data. We find that the deterministic components of heart rate variability are chaotic.展开更多
Background The benefit/risk ratio of stenting in acute ST-segment elevation myocardial infarction （STEMI） patients with single vessel intermediate stenosis culprit lesions merits further study, therefore the subject...Background The benefit/risk ratio of stenting in acute ST-segment elevation myocardial infarction （STEMI） patients with single vessel intermediate stenosis culprit lesions merits further study, therefore the subject of the present study. Methods and results It was a pro- spective, multicenter, randomized controlled trial. Between April 2012 and July 2015, 399 acute STEMI patients with single vessel disease and intermediate （40%-70%） stenosis of the culprit lesion before or after aspiration thrombectomy and/or intracoronary tirofiban （15 pg/kg） were enrolled and were randomly assigned （h 1） to stenting group （n = 201） and non-stenting group （n = 198）. In stenting group, patients received pharmacologic therapy plus standard percutaneous coronary intervention （PCI） with stent implantation. In non-stenting group, pa- tients received pharmacologic therapy and PCI （thrombectomy）, but without dilatation or stenting. Primary endpoint was 12-month rate of major adverse cardiac and eerebrovascular events （MACCE）, a composite of cardiac death, non-fatal myocardial infarction （M1）, repeat re- vascularization and stroke. Secondary endpoints were 12-month rates of all cause death, ischemia driven admission and bleeding complica- tion. Median follow-up time was 12.4 ~ 3.1 months. At 12 months, MACCE occurred in 8.0% of the patients in stenting group, as compared with 15.2% in the non-stenting group （adjusted HR： 0.42, 95% Ch 0.19-0.89, P = 0.02）. The stenting group had lower non-fatal MI rate than non-stenting group, （1.5% vs. 5.5%, P = 0.03）. The two groups shared similar cardiac death, repeat revascularization, stroke, all cause death, ischemia driven readmission and bleeding rates at 12 months. Conclusions Stent implantation had better efficacy and safety in reducing MACCE risks among acute STEMI patients with single vessel intermediate stenosis culprit lesions.展开更多
Objective To explore the impact of a ＂one-week＂ staged muhivessel percutaneous coronary intervention （PCI） versus culprit-only PCI on deaths and major adverse cardiac events （MACE）. Methods We retrospectively an...Objective To explore the impact of a ＂one-week＂ staged muhivessel percutaneous coronary intervention （PCI） versus culprit-only PCI on deaths and major adverse cardiac events （MACE）. Methods We retrospectively analyzed 447 patients with multivessel disease who experienced a ST-segment elevation myocardial infarction （STEMI） within 12 h before undergoing PCI between July 26, 2008 and Septem- ber 25, 201 l. After completion of PCI in the infarct artery, 201 patients still in the hospital agreed to undergo PCI in non-infarct arteries with more than 70% stenosis for a ＂one-week＂ staged multivessel PCI. A total of 246 patients only received intervention for the culprit vessel. Follow-up ended on September 9, 2014. This study examined the differences in deaths from any cause （i.e., cardiac and noncardiac） and MACE between the two treatment groups. Results Compared to a culprit-only PCI treatment approach, the ＂one-week＂ staged multivessel PCI was strongly associated with greater benefits for 55-month all cause death [41 （16.7%） vs. 13 （6.5%）, P = 0.004] and MACE [82 （33.3%） vs. 40 （19.9%）, P = 0.002] rates. In addition, there were significant differences in the number of myocardial infarctions [43 （17.5%） vs. 20 （10.0%）, P = 0.023], coronary-artery bypass grafting [CABG; 20 （8.1%） vs. 6 （3.0%）, P = 0.021], and PCI [31 （12.6%） vs. 12 （6.0%）, P - 0.018]. Patients undergoing culprit-only PCI compared to ＂one-week＂ PCI had the same number of stent thrombosis events [7 （2.8%） vs. 3 （1.5%）, P - 0.522]. Conclusions Compared to a culprit-only PCI treatment approach, ＂one-week＂ staged multi-vessel PCI was a safe and effective selection for STEMI and multi-vessel PCL展开更多
The weakness of classical watermarking methods is the vulnerability to geometrical distortions that widely occur during normal use of the media. In this letter, a new image- watermarking method is presented to resist ...The weakness of classical watermarking methods is the vulnerability to geometrical distortions that widely occur during normal use of the media. In this letter, a new image- watermarking method is presented to resist Rotation, Scale and Translation (RST) attacks. The watermark is embedded into a domain obtained by taking Radon transform of a circular area selected from the original image, and then extracting Two-Dimensional (2-D) Fourier magnitude of the Radon transformed image. Furthermore, to prevent the watermarked image from degrading due to inverse Radon transform, watermark signal is inversely Radon transformed individually. Experimental results demonstrate that the proposed scheme is able to withstand a variety of attacks including common geometric attacks.展开更多
Background This prospective study integrated multiple clinical indexes and inflammatory markers associated with coronary atherosclerotic vulnerable plaque to establish a risk prediction model that can evaluate a patie...Background This prospective study integrated multiple clinical indexes and inflammatory markers associated with coronary atherosclerotic vulnerable plaque to establish a risk prediction model that can evaluate a patient with certain risk factors for the likelihood of the occurrence of a coronary heart disease event within one year. Methods This study enrolled in 2686 patients with mild to moderate coronary artery lesions. Eighty-five indexes were recorded, included baseline clinical data, laboratory studies, and procedural characteristics. During the 1-year follow-up, 233 events occurred, five patients died, four patients suffered a nonfatal myocardial infarction, four patients underwent revascularization, and 220 patients were readmitted for angina pectoris. The Risk Estimation Model and the Simplified Model were conducted using Bayesian networks and compared with the Single Factor Models. Results The area under the curve was 0.88 for the Bayesian Model and 0.85 for the Simplified Model, while the Single Factor Model had a maximum area under the curve of 0.65. Conclusion The new models can be used to assess the short-term risk of individual coronary heart disease events and may assist in guiding preventive care.展开更多
Heart failure （HF） is a potentially fatal disease that affects increasing number of people worldwide. Although heart transplant is the ＂gold standard＂ therapy for HF, due to the limited availability of organs, man...Heart failure （HF） is a potentially fatal disease that affects increasing number of people worldwide. Although heart transplant is the ＂gold standard＂ therapy for HF, due to the limited availability of organs, many patients died when waiting for the transplant. Left ventricular assist device （LVAD）, as a mechanical circulatory support, has become a new light for patients with HF. With the technical advancements, LVADs work not only as a bridge to transplant, but also assist heart recovery and even as a destination therapy in long-term treatment. This observation paper reviewed the development of LVAD and its clinical roles. The challenges and possible solutions in nursing care for pa- tients with LVAD at different stage of implantation were discussed. The healthcare professionals could obtain a better understanding about the LVAD treatment for HF patients.展开更多
文摘The variation and influence factors of yield gravity center of flue-cured tobacco in Hunan were studied in 2006-2015 by regional gravity center method and grey correlation analysis. The results showed that the yields of flue-cured tobacco in various areas in Hunan were mainly of the growing with fluctuation type. The yield gravity centers in the whole province and eastern, southern and western Hunan tobacco-growing areas overall moved in the north by west, south by west, west by south, and south by east directions, respectively; and the movements in the south-north direction were in order of eastern Hunan tobacco-growing area 〉whole province 〉western Hunan tobacco-growing area 〉southern Hunan tobacco-growing area, and the movements inthe east-west direction showed an order of eastern Hunan tobecco-growing area〉western Hunan tobacco-growing area〉whole province〉 southern Hunan tobacco-growing area. The main influence factors of the coordinates of the longitudes and the latitudes differed. The main influence factor was planting area in most cities or counties in the whole province, and was per unit area yield in a few cities or counties. It is advised to construct the ＂one main body and two wings＂ development pattern of flue-cured tobacco production in Hunan with southern Hunan tobacco-growing area as the main body and western and eastern Hunan tobacco-growing areas as the two wings.
文摘It is difficult to establish the process of chaos in time series from cardiac dynamics. The output from such a system is probably the result of both its internal dynamics, and the input to the system from its surroundings. We present an optimization algorithm to find a time series that is as close as possible to the heart rate series subject to the constraint that it is deterministic with respect to some dynamics. The algorithm is tested by some famous forced dynamical systems, and applied to heart rate data. We find that the deterministic components of heart rate variability are chaotic.
文摘Background The benefit/risk ratio of stenting in acute ST-segment elevation myocardial infarction （STEMI） patients with single vessel intermediate stenosis culprit lesions merits further study, therefore the subject of the present study. Methods and results It was a pro- spective, multicenter, randomized controlled trial. Between April 2012 and July 2015, 399 acute STEMI patients with single vessel disease and intermediate （40%-70%） stenosis of the culprit lesion before or after aspiration thrombectomy and/or intracoronary tirofiban （15 pg/kg） were enrolled and were randomly assigned （h 1） to stenting group （n = 201） and non-stenting group （n = 198）. In stenting group, patients received pharmacologic therapy plus standard percutaneous coronary intervention （PCI） with stent implantation. In non-stenting group, pa- tients received pharmacologic therapy and PCI （thrombectomy）, but without dilatation or stenting. Primary endpoint was 12-month rate of major adverse cardiac and eerebrovascular events （MACCE）, a composite of cardiac death, non-fatal myocardial infarction （M1）, repeat re- vascularization and stroke. Secondary endpoints were 12-month rates of all cause death, ischemia driven admission and bleeding complica- tion. Median follow-up time was 12.4 ~ 3.1 months. At 12 months, MACCE occurred in 8.0% of the patients in stenting group, as compared with 15.2% in the non-stenting group （adjusted HR： 0.42, 95% Ch 0.19-0.89, P = 0.02）. The stenting group had lower non-fatal MI rate than non-stenting group, （1.5% vs. 5.5%, P = 0.03）. The two groups shared similar cardiac death, repeat revascularization, stroke, all cause death, ischemia driven readmission and bleeding rates at 12 months. Conclusions Stent implantation had better efficacy and safety in reducing MACCE risks among acute STEMI patients with single vessel intermediate stenosis culprit lesions.
文摘Objective To explore the impact of a ＂one-week＂ staged muhivessel percutaneous coronary intervention （PCI） versus culprit-only PCI on deaths and major adverse cardiac events （MACE）. Methods We retrospectively analyzed 447 patients with multivessel disease who experienced a ST-segment elevation myocardial infarction （STEMI） within 12 h before undergoing PCI between July 26, 2008 and Septem- ber 25, 201 l. After completion of PCI in the infarct artery, 201 patients still in the hospital agreed to undergo PCI in non-infarct arteries with more than 70% stenosis for a ＂one-week＂ staged multivessel PCI. A total of 246 patients only received intervention for the culprit vessel. Follow-up ended on September 9, 2014. This study examined the differences in deaths from any cause （i.e., cardiac and noncardiac） and MACE between the two treatment groups. Results Compared to a culprit-only PCI treatment approach, the ＂one-week＂ staged multivessel PCI was strongly associated with greater benefits for 55-month all cause death [41 （16.7%） vs. 13 （6.5%）, P = 0.004] and MACE [82 （33.3%） vs. 40 （19.9%）, P = 0.002] rates. In addition, there were significant differences in the number of myocardial infarctions [43 （17.5%） vs. 20 （10.0%）, P = 0.023], coronary-artery bypass grafting [CABG; 20 （8.1%） vs. 6 （3.0%）, P = 0.021], and PCI [31 （12.6%） vs. 12 （6.0%）, P - 0.018]. Patients undergoing culprit-only PCI compared to ＂one-week＂ PCI had the same number of stent thrombosis events [7 （2.8%） vs. 3 （1.5%）, P - 0.522]. Conclusions Compared to a culprit-only PCI treatment approach, ＂one-week＂ staged multi-vessel PCI was a safe and effective selection for STEMI and multi-vessel PCL
文摘The weakness of classical watermarking methods is the vulnerability to geometrical distortions that widely occur during normal use of the media. In this letter, a new image- watermarking method is presented to resist Rotation, Scale and Translation (RST) attacks. The watermark is embedded into a domain obtained by taking Radon transform of a circular area selected from the original image, and then extracting Two-Dimensional (2-D) Fourier magnitude of the Radon transformed image. Furthermore, to prevent the watermarked image from degrading due to inverse Radon transform, watermark signal is inversely Radon transformed individually. Experimental results demonstrate that the proposed scheme is able to withstand a variety of attacks including common geometric attacks.
文摘Background This prospective study integrated multiple clinical indexes and inflammatory markers associated with coronary atherosclerotic vulnerable plaque to establish a risk prediction model that can evaluate a patient with certain risk factors for the likelihood of the occurrence of a coronary heart disease event within one year. Methods This study enrolled in 2686 patients with mild to moderate coronary artery lesions. Eighty-five indexes were recorded, included baseline clinical data, laboratory studies, and procedural characteristics. During the 1-year follow-up, 233 events occurred, five patients died, four patients suffered a nonfatal myocardial infarction, four patients underwent revascularization, and 220 patients were readmitted for angina pectoris. The Risk Estimation Model and the Simplified Model were conducted using Bayesian networks and compared with the Single Factor Models. Results The area under the curve was 0.88 for the Bayesian Model and 0.85 for the Simplified Model, while the Single Factor Model had a maximum area under the curve of 0.65. Conclusion The new models can be used to assess the short-term risk of individual coronary heart disease events and may assist in guiding preventive care.
文摘Heart failure （HF） is a potentially fatal disease that affects increasing number of people worldwide. Although heart transplant is the ＂gold standard＂ therapy for HF, due to the limited availability of organs, many patients died when waiting for the transplant. Left ventricular assist device （LVAD）, as a mechanical circulatory support, has become a new light for patients with HF. With the technical advancements, LVADs work not only as a bridge to transplant, but also assist heart recovery and even as a destination therapy in long-term treatment. This observation paper reviewed the development of LVAD and its clinical roles. The challenges and possible solutions in nursing care for pa- tients with LVAD at different stage of implantation were discussed. The healthcare professionals could obtain a better understanding about the LVAD treatment for HF patients.
