Objective Many patients receiving dual antiplatelet therapy still had recurrent strokes.We aimed to identify factors associated with recurrent stroke at 90 days in patients receiving dual antiplatelet therapy in Clopi...Objective Many patients receiving dual antiplatelet therapy still had recurrent strokes.We aimed to identify factors associated with recurrent stroke at 90 days in patients receiving dual antiplatelet therapy in Clopidogrel in High-risk patients with Acute Non-disabling Cerebrovascular Events trial.Methods Patients with transient ischaemic attack or minor stroke receiving clopidogrel and aspirin in the trial were analysed in the study.The primary outcome was recurrent stroke within 90 days after the index event.Cox proportional hazard model with backward selection was used to identify factors associated with stroke.results Among 2584 patients,212(8.2%)had a recurrent stroke,216(8.4%)had a composite of stroke,myocardial infarction,or vascular death and 204(7.9%)had ischaemic stroke within 90 days.Multivariate analysis identified the following factors associated with stroke:history of hypertension with poor blood pressure control(HR,1.92;95%CI 1.22 to 3.03),the high baseline National Institute of Health Stroke Scale(NIHSS)score of 2 and 3(2.12(1.07 to 4.21)and 4.11(2.05 to 8.22),respectively),time from onset to randomisation of<12 hours(1.47(1.12 to 1.94)),the lipid-lowering therapy(0.61(0.47 to 0.83)),the open-label aspirin dose at day 1 of≥300 mg(1.98(1.45 to 2.69)).Intracranial arterial stenosis(ICAS)was significantly associated with stroke in the sensitivity analysis(2.17(1.16 to 4.04)).conclusions The high baseline NIHSS score,hypertension with poor blood pressure control,ICAS,time from onset to randomisation of less than 12 hours and no lipid-lowering therapy were associated with stroke,suggesting that patients with identified predictors still remain to be at high risk of recurrent stroke although being under the dual antiplatelet therapy.展开更多
Background and purpose Dyslipidaemia is a major risk factor for ischaemic stroke and transient ischaemic attack(TIA).This study aimed to investigate the association between baseline low-density lipoprotein cholesterol...Background and purpose Dyslipidaemia is a major risk factor for ischaemic stroke and transient ischaemic attack(TIA).This study aimed to investigate the association between baseline low-density lipoprotein cholesterol(LDL-C)level,lipid-lowering treatment and short-term risk of new stroke in patients with a minor ischaemic stroke or TIA.Methods We derived data from the Clopidogrel in High-risk patients with Acute Non-disabling Cerebrovascular Events trial.Patients with a minor stroke or TIA were categorised by LDL-C level at baseline(<2.6 or≥2.6 mmol/L(100 mg/dL))and with or without lipid-lowering treatment after symptom onset.The primary outcome was a new ischaemic stroke at 3 months.The association of baseline LDL-C level,lowering treatment and outcomes were assessed.Results Among 3027 patients,2154(71.2%)patients had an initial LDL-C≥2.6 mmol/L,of which 1267(41.9%)received lipid-lowering treatment.Elevated LDL-C level was associated with a higher risk of new ischaemic stroke at 3 months in patients without lipid-lowering treatment(adj.HR=1.35,95%CI:1.19 to 1.53),but not in those with lipid-lowering treatment(adj.HR=0.99,95%CI:0.82 to 1.19)(p for interaction=0.007).Patients with LDL-C≥2.6 mmol/L had a numerically higher risk of ischaemic stroke(11.8%vs 8.0%,adj.HR=1.37,95%CI:0.96 to 1.96)in those without lipid-lowering treatment.For patients with LDL-C≥2.6 mmol/L,lipid-lowering treatment was associated with reduced risk of ischaemic stroke at 3 months(7.9%vs 11.8%;adj.HR=0.54,95%CI:0.39 to 0.75).Conclusions Elevated untreated baseline LDL-C level was associated with an increased short-term risk of ischaemic stroke among patients presenting with minor ischaemic stroke or TIA.There was potential benefit of lipid-lowering treatment in minor stroke or TIA patients with LDL-C≥2.6 mmol/L.Trial registration number NCT00979589.展开更多
Two-dimensional carbon nitride(2 D-C_(3) N_(4))nanosheets are promising materials in photocatalytic water splitting,but still suffer from easy agglomeration and fast photogene rated electron-hole pairs recombination.T...Two-dimensional carbon nitride(2 D-C_(3) N_(4))nanosheets are promising materials in photocatalytic water splitting,but still suffer from easy agglomeration and fast photogene rated electron-hole pairs recombination.To tackle this issue,herein,a hierarchical Nb_(2) O_(5)/2 D-C_(3) N_(4) heterostructure is precisely constructed and the built-in electric field between Nb_(2)O_(5) and 2 D-C_(3) N_(4) can provide the driving force to separate/transfer the charge carriers efficiently.Moreover,the strongly Lewis acidic Nb_(2)O_(5) can adsorb TEOA molecules on its surface at locally high concentrations to facilitate the oxidation reaction kinetics under irradiation,resulting in efficient photogene rated electrons-holes separation and exceptional photocatalytic hydrogen evolution.As expected,the champion Nb_(2)O_(5)/2 D-C_(3)N_(4) heterostructure achieves an exceptional H2 evolution rate of 31.6 mmol g^(-1) h^(-1),which is 213.6 times and 4.3 times higher than that of pristine Nb_(2)O_(5) and2 D-C_(3)N_(4),respectively.Moreover,the champion heterostructure possesses a high apparent quantum efficiency(AQE)of 45.08%atλ=405 nm and superior cycling stability.Furthermore,a possible photocatalytic mechanism of the energy band alignment at the hetero-interface is proposed based on the systematical characterizations accompanied by density functional theory(DFT)calculations.This work paves the way for the precise construction of a high-quality heterostructured photocatalyst with efficient charge separation to boost hydrogen production.展开更多
Pediatrics is one of the clinical professional courses that is highly practical.The traditional single teaching method is inconducive to stimulating students’interest in learning,resulting in a poor classroom teachin...Pediatrics is one of the clinical professional courses that is highly practical.The traditional single teaching method is inconducive to stimulating students’interest in learning,resulting in a poor classroom teaching effect.To change the traditional single teaching model and promote and improve the development of pediatric teaching,according to the level of pediatric teaching,colleges can consider combining two teaching methods to carry out pediatric teaching.The main research in this paper is the combination of PBL(problem-based learning)teaching and CBS(case-based study)teaching.An overview of the two teaching methods is first given,and then the application significance of the combination of the two teaching methods is analyzed.Lastly,it explores the specific implementation of hybrid teaching methods in pediatric teaching.展开更多
This paper characterizes ideal structure of the uniform Roe algebra B*(X) over simple cores X. A necessary and sufficient condition for a principal ideal of B*(X) to be spatial is given and an example of non-spatial i...This paper characterizes ideal structure of the uniform Roe algebra B*(X) over simple cores X. A necessary and sufficient condition for a principal ideal of B*(X) to be spatial is given and an example of non-spatial ideal of B*(X) is constructed. By establishing an one-one correspondence between the ideals of B* (X) and the ω-filters on X, the maximal ideals of B*(X) are completely described by the corona of the Stone-Cech compactification of X.展开更多
Background Stroke is the leading cause of mortality in China,with limited evidence of in-hospital burden obtained from nationwide surveys.We aimed to monitor and track the temporal trends and rural-urban disparities i...Background Stroke is the leading cause of mortality in China,with limited evidence of in-hospital burden obtained from nationwide surveys.We aimed to monitor and track the temporal trends and rural-urban disparities in cerebrovascular risk factors,management and outcomes from 2005 to 2015.Methods We used a two-stage random sampling survey to create a nationally representative sample of patients admitted for ischaemic stroke in 2005,2010 and 2015.We sampled participating hospitals with an economic-geographical region-stratified random-sampling approach first and then obtained patients with a systematic sampling approach.We weighed our survey data to estimate the national-level results and assess changes from 2005 to 2015.Results We analysed 28277 ischaemic stroke admissions from 189 participating hospitals.From 2005 to 2015,the estimated national hospital admission rate for ischaemic stroke per 100000 people increased(from 75.9 to 402.7,Ptrend<0.001),and the prevalence of risk factors,including hypertension,diabetes,dyslipidaemia and current smoking,increased.The composite score of diagnostic tests for stroke aetiology assessment(from 0.22 to 0.36,Ptrend<0.001)and secondary prevention treatments(from 0.46 to 0.70,Ptrend<0.001)were improved.A temporal decrease was found in discharge against medical advice(DAMA)(from 15.2%(95%CI 13.7%to 16.7%)to 8.6%(8.1%to 9.0%);adjusted Ptrend=0.046),and decreases in in-hospital mortality(0.7%in 2015 vs 1.8%in 2005;adjusted OR(aOR)0.52;95%CI 0.32 to 0.85)and the composite outcome of in-hospital mortality or DAMA(8.4%in 2015 vs 13.9%in 2005;aOR 0.65;95%CI 0.47 to 0.89)were observed.Disparities between rural and urban hospitals narrowed;however,disparities persisted in in-hospital management(brain MRI:rural-urban difference from−14.4%to−11.2%;cerebrovascular assessment:from−20.3%to−16.7%;clopidogrel:from−2.1%to−10.3%;anticoagulant for atrial fibrillation:from−10.9%to−8.2%)and in-hospital outcomes(DAMA:from 2.7%to 5.0%;composite outcome of in-hospital mortality or DAM展开更多
The pollen of 57 species representing 7 sections ofArtemisia was examined by light microscope and scanning microscope for the purpose to elucidate the systematic relationships of the genus. The examination indicates t...The pollen of 57 species representing 7 sections ofArtemisia was examined by light microscope and scanning microscope for the purpose to elucidate the systematic relationships of the genus. The examination indicates that the pollen grains present high concordance which is characterized by the globular or the approximate shape, 3-lobed circular from polar view while granular or ellipse sphere from tropical plate with tricolporate structure. The exine of pollen has an obvious double structure of inner and outer layers (including the tectum and columnar layers) where the outer is thicker than the inner and the sculpture of exine degenerates into small spinules easily distinguishable from other genera of the Compositae. Based on exine sculpture. the pollen grains ofArtemisia can be divided into two types: Myriantha type and Mongolica type, which possesses 4 subtypes according to the distribution forms of spinule: (1) Sacrorum subtype, (2) Oligocarpa subtype, (3) Lavandulaefolia subtype, (4) Anomale subtype.展开更多
Amorphous carbon materials hold great potential for practical use in potassium-ion batteries(PIBs)due to their abundant resources,low cost and high structural stability.However,given the challenge of sluggish potassia...Amorphous carbon materials hold great potential for practical use in potassium-ion batteries(PIBs)due to their abundant resources,low cost and high structural stability.However,given the challenge of sluggish potassiation kinetics,the rate performance of amorphous carbon is severely hindered.Herein,amorphous carbon compounded with graphitic domains(HG-CNTs)was proposed as an advanced anode for PIBs.As directly verified by in situ transmission electron microscopy(TEM),the graphitic domains guarantee fast K-ions transport in the carbon composite at a high current density,while the amorphous carbon shells ensure the structural integrity during potassiation,thus boosting its fast and durable K^(+)storage.As a PlB anode,the HG-CNTs electrode exhibits not only a super-stable long-term cyclability(191.6 mAh g^(-1)at 1 A g^(-1)with almost no capacity decay over 3000 cycles),but also an outstanding rate performance(184.5 mAh g^(-1)at 2 A g^(-1)).Ex situ Raman and TEM results further suggest that the highly reversible structure of HG-CNTs is responsible for its superior electrochemical stability.This work provides helpful insights into the development of carbonaceous electrodes with both high rate capability and long cycle life for PIBs.展开更多
In this paper was extended the HV-type mixing rules to Harmens-Knapp cubic equation state(HK CEOS). The new HV-type mixing rule with HK CEOS was tested for Vapor-liquid equilibrium(VLE) of different polar and nonpolar...In this paper was extended the HV-type mixing rules to Harmens-Knapp cubic equation state(HK CEOS). The new HV-type mixing rule with HK CEOS was tested for Vapor-liquid equilibrium(VLE) of different polar and nonpolar systems. The tested results are in good agreement with existing experimental data within a wide range of temperatures and pressures. In comparison with the VDW mixing rule, the new mixing rule gives much better predictions for the VLE of nonpolar and polar systems.展开更多
Robot programming by demonstration (PBD) system for task in which objectrequires contact with environment is built based on the controlling skill model. The skill isdescribed in three aspects: contact state classifier...Robot programming by demonstration (PBD) system for task in which objectrequires contact with environment is built based on the controlling skill model. The skill isdescribed in three aspects: contact state classifier, acquirement of contact states sequence andcontrolling transition between states. The classifier is developed with the support vector machineby using force sense. Sequence of states is obtained from the force signal of demonstration by theevent trigger. The velocity command of transition is achieved by linearization method. The PBDsystem is successfully built with robot controller with open architecture.展开更多
基金The study was supported by grants from the Ministry of Science and Technology of the People’s Republic of China and Program for New Century Excellent Talents in University.The grant numbers are 2008ZX09312-008,2011BAI08B02,2012ZX09303,200902004 and NCET-13-0917.
文摘Objective Many patients receiving dual antiplatelet therapy still had recurrent strokes.We aimed to identify factors associated with recurrent stroke at 90 days in patients receiving dual antiplatelet therapy in Clopidogrel in High-risk patients with Acute Non-disabling Cerebrovascular Events trial.Methods Patients with transient ischaemic attack or minor stroke receiving clopidogrel and aspirin in the trial were analysed in the study.The primary outcome was recurrent stroke within 90 days after the index event.Cox proportional hazard model with backward selection was used to identify factors associated with stroke.results Among 2584 patients,212(8.2%)had a recurrent stroke,216(8.4%)had a composite of stroke,myocardial infarction,or vascular death and 204(7.9%)had ischaemic stroke within 90 days.Multivariate analysis identified the following factors associated with stroke:history of hypertension with poor blood pressure control(HR,1.92;95%CI 1.22 to 3.03),the high baseline National Institute of Health Stroke Scale(NIHSS)score of 2 and 3(2.12(1.07 to 4.21)and 4.11(2.05 to 8.22),respectively),time from onset to randomisation of<12 hours(1.47(1.12 to 1.94)),the lipid-lowering therapy(0.61(0.47 to 0.83)),the open-label aspirin dose at day 1 of≥300 mg(1.98(1.45 to 2.69)).Intracranial arterial stenosis(ICAS)was significantly associated with stroke in the sensitivity analysis(2.17(1.16 to 4.04)).conclusions The high baseline NIHSS score,hypertension with poor blood pressure control,ICAS,time from onset to randomisation of less than 12 hours and no lipid-lowering therapy were associated with stroke,suggesting that patients with identified predictors still remain to be at high risk of recurrent stroke although being under the dual antiplatelet therapy.
基金supported by grants from National Key R&D Program of China(2018YFC1312903)grants from the National Natural Science Foundation of China(81971091,81870905,U20A20358)+1 种基金Beijing Hospitals Authority Youth Programme(QML20190501)grants from Beijing Municipal Science and Technology Commission(D171100003017002,Z181100001818001).
文摘Background and purpose Dyslipidaemia is a major risk factor for ischaemic stroke and transient ischaemic attack(TIA).This study aimed to investigate the association between baseline low-density lipoprotein cholesterol(LDL-C)level,lipid-lowering treatment and short-term risk of new stroke in patients with a minor ischaemic stroke or TIA.Methods We derived data from the Clopidogrel in High-risk patients with Acute Non-disabling Cerebrovascular Events trial.Patients with a minor stroke or TIA were categorised by LDL-C level at baseline(<2.6 or≥2.6 mmol/L(100 mg/dL))and with or without lipid-lowering treatment after symptom onset.The primary outcome was a new ischaemic stroke at 3 months.The association of baseline LDL-C level,lowering treatment and outcomes were assessed.Results Among 3027 patients,2154(71.2%)patients had an initial LDL-C≥2.6 mmol/L,of which 1267(41.9%)received lipid-lowering treatment.Elevated LDL-C level was associated with a higher risk of new ischaemic stroke at 3 months in patients without lipid-lowering treatment(adj.HR=1.35,95%CI:1.19 to 1.53),but not in those with lipid-lowering treatment(adj.HR=0.99,95%CI:0.82 to 1.19)(p for interaction=0.007).Patients with LDL-C≥2.6 mmol/L had a numerically higher risk of ischaemic stroke(11.8%vs 8.0%,adj.HR=1.37,95%CI:0.96 to 1.96)in those without lipid-lowering treatment.For patients with LDL-C≥2.6 mmol/L,lipid-lowering treatment was associated with reduced risk of ischaemic stroke at 3 months(7.9%vs 11.8%;adj.HR=0.54,95%CI:0.39 to 0.75).Conclusions Elevated untreated baseline LDL-C level was associated with an increased short-term risk of ischaemic stroke among patients presenting with minor ischaemic stroke or TIA.There was potential benefit of lipid-lowering treatment in minor stroke or TIA patients with LDL-C≥2.6 mmol/L.Trial registration number NCT00979589.
基金Finacial support from the Natural Science Foundation of Jiangsu Province(BK20170549,BK20180887)the National Natural Science Foundation of China(21706103,62004084)+3 种基金Guangdong Innovation Research Team for Higher Education(2017KCXTD030)the High-level Talents Project of Dongguan University of Technology(KCYKYQD2017017)the Young Talent Cultivation Plan of Jiangsu UniversityJiangsu Provincial Program for High-Level Innovative and Entrepreneurial Talents Introduction。
文摘Two-dimensional carbon nitride(2 D-C_(3) N_(4))nanosheets are promising materials in photocatalytic water splitting,but still suffer from easy agglomeration and fast photogene rated electron-hole pairs recombination.To tackle this issue,herein,a hierarchical Nb_(2) O_(5)/2 D-C_(3) N_(4) heterostructure is precisely constructed and the built-in electric field between Nb_(2)O_(5) and 2 D-C_(3) N_(4) can provide the driving force to separate/transfer the charge carriers efficiently.Moreover,the strongly Lewis acidic Nb_(2)O_(5) can adsorb TEOA molecules on its surface at locally high concentrations to facilitate the oxidation reaction kinetics under irradiation,resulting in efficient photogene rated electrons-holes separation and exceptional photocatalytic hydrogen evolution.As expected,the champion Nb_(2)O_(5)/2 D-C_(3)N_(4) heterostructure achieves an exceptional H2 evolution rate of 31.6 mmol g^(-1) h^(-1),which is 213.6 times and 4.3 times higher than that of pristine Nb_(2)O_(5) and2 D-C_(3)N_(4),respectively.Moreover,the champion heterostructure possesses a high apparent quantum efficiency(AQE)of 45.08%atλ=405 nm and superior cycling stability.Furthermore,a possible photocatalytic mechanism of the energy band alignment at the hetero-interface is proposed based on the systematical characterizations accompanied by density functional theory(DFT)calculations.This work paves the way for the precise construction of a high-quality heterostructured photocatalyst with efficient charge separation to boost hydrogen production.
文摘Pediatrics is one of the clinical professional courses that is highly practical.The traditional single teaching method is inconducive to stimulating students’interest in learning,resulting in a poor classroom teaching effect.To change the traditional single teaching model and promote and improve the development of pediatric teaching,according to the level of pediatric teaching,colleges can consider combining two teaching methods to carry out pediatric teaching.The main research in this paper is the combination of PBL(problem-based learning)teaching and CBS(case-based study)teaching.An overview of the two teaching methods is first given,and then the application significance of the combination of the two teaching methods is analyzed.Lastly,it explores the specific implementation of hybrid teaching methods in pediatric teaching.
基金Project supported by the 973 Project of the Ministry of Science and Technology of China, the National Natural Science Foundation of China (No.10201007) the Doctoral Programme Foundation of the Ministry of Education of China and the Shanghai Science and
文摘This paper characterizes ideal structure of the uniform Roe algebra B*(X) over simple cores X. A necessary and sufficient condition for a principal ideal of B*(X) to be spatial is given and an example of non-spatial ideal of B*(X) is constructed. By establishing an one-one correspondence between the ideals of B* (X) and the ω-filters on X, the maximal ideals of B*(X) are completely described by the corona of the Stone-Cech compactification of X.
基金Ministry of Science and Technology of the People’s Republic of China(National Key R&D Programme of China,2017YFC1310901,2016YFC0901002,2017YFC1307905,2015BAI12B00)National Natural Science Foundation of China(No.81801152,92046016)+1 种基金Beijing Natural Science Foundation(Z200016),Beijing Talents Project(2018000021223ZK03)Youth Programme(QML20180501)and Sanofi funding.
文摘Background Stroke is the leading cause of mortality in China,with limited evidence of in-hospital burden obtained from nationwide surveys.We aimed to monitor and track the temporal trends and rural-urban disparities in cerebrovascular risk factors,management and outcomes from 2005 to 2015.Methods We used a two-stage random sampling survey to create a nationally representative sample of patients admitted for ischaemic stroke in 2005,2010 and 2015.We sampled participating hospitals with an economic-geographical region-stratified random-sampling approach first and then obtained patients with a systematic sampling approach.We weighed our survey data to estimate the national-level results and assess changes from 2005 to 2015.Results We analysed 28277 ischaemic stroke admissions from 189 participating hospitals.From 2005 to 2015,the estimated national hospital admission rate for ischaemic stroke per 100000 people increased(from 75.9 to 402.7,Ptrend<0.001),and the prevalence of risk factors,including hypertension,diabetes,dyslipidaemia and current smoking,increased.The composite score of diagnostic tests for stroke aetiology assessment(from 0.22 to 0.36,Ptrend<0.001)and secondary prevention treatments(from 0.46 to 0.70,Ptrend<0.001)were improved.A temporal decrease was found in discharge against medical advice(DAMA)(from 15.2%(95%CI 13.7%to 16.7%)to 8.6%(8.1%to 9.0%);adjusted Ptrend=0.046),and decreases in in-hospital mortality(0.7%in 2015 vs 1.8%in 2005;adjusted OR(aOR)0.52;95%CI 0.32 to 0.85)and the composite outcome of in-hospital mortality or DAMA(8.4%in 2015 vs 13.9%in 2005;aOR 0.65;95%CI 0.47 to 0.89)were observed.Disparities between rural and urban hospitals narrowed;however,disparities persisted in in-hospital management(brain MRI:rural-urban difference from−14.4%to−11.2%;cerebrovascular assessment:from−20.3%to−16.7%;clopidogrel:from−2.1%to−10.3%;anticoagulant for atrial fibrillation:from−10.9%to−8.2%)and in-hospital outcomes(DAMA:from 2.7%to 5.0%;composite outcome of in-hospital mortality or DAM
基金Supported by the National Natural Science Foundation of China (38770065) and the Foundation of Hong Kong Baptist University
文摘The pollen of 57 species representing 7 sections ofArtemisia was examined by light microscope and scanning microscope for the purpose to elucidate the systematic relationships of the genus. The examination indicates that the pollen grains present high concordance which is characterized by the globular or the approximate shape, 3-lobed circular from polar view while granular or ellipse sphere from tropical plate with tricolporate structure. The exine of pollen has an obvious double structure of inner and outer layers (including the tectum and columnar layers) where the outer is thicker than the inner and the sculpture of exine degenerates into small spinules easily distinguishable from other genera of the Compositae. Based on exine sculpture. the pollen grains ofArtemisia can be divided into two types: Myriantha type and Mongolica type, which possesses 4 subtypes according to the distribution forms of spinule: (1) Sacrorum subtype, (2) Oligocarpa subtype, (3) Lavandulaefolia subtype, (4) Anomale subtype.
基金financially supported by the National Natural Science Foundation of China(52172240)the Fundamental Research Funds for the Central Universities(20720200075)the National Program for Thousand Young Talents of China,and the“Double-First Class”Foundation of Materials and Intelligent Manufacturing Discipline of Xiamen University。
文摘Amorphous carbon materials hold great potential for practical use in potassium-ion batteries(PIBs)due to their abundant resources,low cost and high structural stability.However,given the challenge of sluggish potassiation kinetics,the rate performance of amorphous carbon is severely hindered.Herein,amorphous carbon compounded with graphitic domains(HG-CNTs)was proposed as an advanced anode for PIBs.As directly verified by in situ transmission electron microscopy(TEM),the graphitic domains guarantee fast K-ions transport in the carbon composite at a high current density,while the amorphous carbon shells ensure the structural integrity during potassiation,thus boosting its fast and durable K^(+)storage.As a PlB anode,the HG-CNTs electrode exhibits not only a super-stable long-term cyclability(191.6 mAh g^(-1)at 1 A g^(-1)with almost no capacity decay over 3000 cycles),but also an outstanding rate performance(184.5 mAh g^(-1)at 2 A g^(-1)).Ex situ Raman and TEM results further suggest that the highly reversible structure of HG-CNTs is responsible for its superior electrochemical stability.This work provides helpful insights into the development of carbonaceous electrodes with both high rate capability and long cycle life for PIBs.
文摘In this paper was extended the HV-type mixing rules to Harmens-Knapp cubic equation state(HK CEOS). The new HV-type mixing rule with HK CEOS was tested for Vapor-liquid equilibrium(VLE) of different polar and nonpolar systems. The tested results are in good agreement with existing experimental data within a wide range of temperatures and pressures. In comparison with the VDW mixing rule, the new mixing rule gives much better predictions for the VLE of nonpolar and polar systems.
基金This project is supported by National Natural Science Foundation of China(No.6997S014) China 863 Robot Automatic Assembly Topic (No.863512972004).
文摘Robot programming by demonstration (PBD) system for task in which objectrequires contact with environment is built based on the controlling skill model. The skill isdescribed in three aspects: contact state classifier, acquirement of contact states sequence andcontrolling transition between states. The classifier is developed with the support vector machineby using force sense. Sequence of states is obtained from the force signal of demonstration by theevent trigger. The velocity command of transition is achieved by linearization method. The PBDsystem is successfully built with robot controller with open architecture.
