This study reconstructs the long-term evolution of river terraces over large spatial scales along the Anning River, western Sichuan, and identifies external factors controlling terrace formation. Pollen record analysi...This study reconstructs the long-term evolution of river terraces over large spatial scales along the Anning River, western Sichuan, and identifies external factors controlling terrace formation. Pollen record analysis and terrace structure indicate that formation of the middle section of terraces I-III resulted from the interaction of changing climates and uplift of the margins of the Qinghai-Tibet Plateau. The relative influence of climate and uplift in terrace formation changes in different periods. The terraces reveal multiple, gradual uplift events on the eastern Qinghai-Tibet Plateau, which is of great significance for determining uplift mechanisms across the entire plateau.展开更多
Objective： To observe the clinical efficacy of Xin＇anning Nasal Drop （XAND,心安宁滴鼻剂） in treating coronary heart disease with unstable angina pectoris （CHD-UAP）. Methods： Sixty patients with CHD-UAP were ass...Objective： To observe the clinical efficacy of Xin＇anning Nasal Drop （XAND,心安宁滴鼻剂） in treating coronary heart disease with unstable angina pectoris （CHD-UAP）. Methods： Sixty patients with CHD-UAP were assigned, according to the randomizing number table, to two groups, the control group treated with conventional Western medicine, and the treated group treated with conventional Western medicine plus XAND. The clinical efficacy and the changes of S-T segment in resting EKG and total ischemia burden （TIB） in 24-h dynamic EKG were observed. Results： The clinical efficacy, including the effect of angina alleviation, its initiation, and the effect of TOM syndrome score reduction, were significantly superior in the treated group to those in the control group （ P〈0.05 or P〈0.01 ）. The degree and extent of myocardial ischemia were significantly improved in both groups （ P〈0.01 ）, but the improvement in the treated group was better than that in the control group （ P〈0.05）. Moreover, it was worth mentioning that the immediate effect in the treated group was better than that in the control group, and the reduction of TIB, the improvement in heart rate and myocardial oxygen consumption （ immediately after the first administration or by the end of the therapeutic course）, and systolic blood pressure after treatment in the former were all superior to those in the latter, showing significant difference （ P〈0.05 or P〈0.01 ）. Conclusion： XAND has a quick effect in alleviating angina in patients with CHD-UAP, and it is worthy of further studies and spreading in clinical practice.展开更多
Scheduling of finite capacity discrete manufacturing processes is attracting increasing attention. The major difficulty in this area is concerned with the combinatorial explosion which occurs once one begins to consi...Scheduling of finite capacity discrete manufacturing processes is attracting increasing attention. The major difficulty in this area is concerned with the combinatorial explosion which occurs once one begins to consider the scheduling of workpieces through more than a few machines. What kind of laws must be satisfied in modelling、simulation and perturbation analysis? In this paper, we show how to deal with the structure of complex assembly production systems hierarchically to achieve simplicity for these purposes. We will also describe two ′conservation laws of workpieces′ applicable to manufacturing scheduling problems and then develop a complete state space representation. Some experiments and results will also be included. This approach can be used for both stochastic and deterministic dynamical systems in this area and can also be extended to other areas which require decision support.展开更多
Salinity stress is amajor constraint on agricultural productivity,particularly in arid and semi-arid regions.This study evaluated the potential of Ascophyllum nodosum extract(ANE)in mitigating salinity-induced stress ...Salinity stress is amajor constraint on agricultural productivity,particularly in arid and semi-arid regions.This study evaluated the potential of Ascophyllum nodosum extract(ANE)in mitigating salinity-induced stress and enhancing the growth and physiological performance of Portulaca oleracea L.under NaCl concentrations of 0,50,70,and 100 mM for 50 days.A two-way ANOVA assessed the effects of NaCl concentration,ANE treatment,and their interaction.The results showed that ANE significantly increased plant height at 50 mMNaCl(p=0.0011)but had no effect at higher salinity levels(p>0.05).Shoot dry weight was significantly influenced by the interaction of NaCl and ANE(p=0.0064),with ANE increasing biomass at 0 mM but decreasing it at 100 mM NaCl.However,ANE did not significantly affect root dry weight(p>0.05).Physiological responses indicated a significant increase in proline content at 50mMNaCl(p=0.0011),supporting improved osmotic adjustment.Total soluble protein was significantly enhanced at all salinity levels except 100 mM NaCl(p<0.01).Regarding ionic regulation,ANE had no significant effect on leaf sap pH(p>0.05)but increased electrical conductivity(EC)at 70 and 100 mM NaCl(p<0.01),suggesting a role in ion homeostasis under high salinity.Photosynthetic pigments responded positively to ANE,with significant increases in chlorophyll“a”(p<0.0001)and carotenoid content(p<0.0001),while chlorophyll“b”remained unchanged(p>0.05).These findings highlight ANE’s potential as a sustainable biostimulant for improving salinity tolerance,particularly at moderate NaCl levels.Future research should focus on molecular mechanisms and long-term field applications to optimize ANE’s role in enhancing soil and crop productivity under salinity stress.展开更多
从花生种子中分离纯化花生过敏原Ara h 2,采用酶联免疫吸附试验(ELISA)、圆二色谱(CD)、ANS荧光探针及紫外可见(UV-Vis)光谱等方法,系统研究热加工对Ara h 2抗原性和结构的影响。结果表明:Ara h 2蛋白经55或70℃处理后其抗原性略有升高,...从花生种子中分离纯化花生过敏原Ara h 2,采用酶联免疫吸附试验(ELISA)、圆二色谱(CD)、ANS荧光探针及紫外可见(UV-Vis)光谱等方法,系统研究热加工对Ara h 2抗原性和结构的影响。结果表明:Ara h 2蛋白经55或70℃处理后其抗原性略有升高,经85,100或115℃处理后,其抗原性显著降低,且随着温度和时间的增加其抗原性均不断降低。CD色谱分析表明,Ara h 2经热处理后其二级结构发生变化;ANS荧光探针光谱显示,不同的热处理均导致Ara h 2表面疏水性增加。紫外光谱显示,不同温度对Ara h 2处理30 min后(除55℃外),其紫外吸收值均升高。Ara h 2经100℃处理不同时间后,其紫外吸收值均有增加。由此推断,花生过敏原Ara h 2的构象改变导致了其抗原性的降低。展开更多
近似数量系统(Approximate Number System,ANS)指个体在不需要依赖于计算和数量符号的情况下,对一组数量进行近似表征的系统。通过总结近十年来研究者们在ANS的遗传和神经基础、干预训练等方面取得的新进展,指出未来应综合运用各种认知...近似数量系统(Approximate Number System,ANS)指个体在不需要依赖于计算和数量符号的情况下,对一组数量进行近似表征的系统。通过总结近十年来研究者们在ANS的遗传和神经基础、干预训练等方面取得的新进展,指出未来应综合运用各种认知神经科学研究手段立足于ANS的基因和脑生理基础研究,进一步揭示ANS的本质和内在发生发展机制,并将有关研究发现运用到教育教学中,对数学困难儿童进行干预,以提高其数学能力和适应社会的能力。展开更多
基金supported by National Basic Research Program of China (Grant No. 2004CB418401)
文摘This study reconstructs the long-term evolution of river terraces over large spatial scales along the Anning River, western Sichuan, and identifies external factors controlling terrace formation. Pollen record analysis and terrace structure indicate that formation of the middle section of terraces I-III resulted from the interaction of changing climates and uplift of the margins of the Qinghai-Tibet Plateau. The relative influence of climate and uplift in terrace formation changes in different periods. The terraces reveal multiple, gradual uplift events on the eastern Qinghai-Tibet Plateau, which is of great significance for determining uplift mechanisms across the entire plateau.
文摘Objective： To observe the clinical efficacy of Xin＇anning Nasal Drop （XAND,心安宁滴鼻剂） in treating coronary heart disease with unstable angina pectoris （CHD-UAP）. Methods： Sixty patients with CHD-UAP were assigned, according to the randomizing number table, to two groups, the control group treated with conventional Western medicine, and the treated group treated with conventional Western medicine plus XAND. The clinical efficacy and the changes of S-T segment in resting EKG and total ischemia burden （TIB） in 24-h dynamic EKG were observed. Results： The clinical efficacy, including the effect of angina alleviation, its initiation, and the effect of TOM syndrome score reduction, were significantly superior in the treated group to those in the control group （ P〈0.05 or P〈0.01 ）. The degree and extent of myocardial ischemia were significantly improved in both groups （ P〈0.01 ）, but the improvement in the treated group was better than that in the control group （ P〈0.05）. Moreover, it was worth mentioning that the immediate effect in the treated group was better than that in the control group, and the reduction of TIB, the improvement in heart rate and myocardial oxygen consumption （ immediately after the first administration or by the end of the therapeutic course）, and systolic blood pressure after treatment in the former were all superior to those in the latter, showing significant difference （ P〈0.05 or P〈0.01 ）. Conclusion： XAND has a quick effect in alleviating angina in patients with CHD-UAP, and it is worthy of further studies and spreading in clinical practice.
文摘Scheduling of finite capacity discrete manufacturing processes is attracting increasing attention. The major difficulty in this area is concerned with the combinatorial explosion which occurs once one begins to consider the scheduling of workpieces through more than a few machines. What kind of laws must be satisfied in modelling、simulation and perturbation analysis? In this paper, we show how to deal with the structure of complex assembly production systems hierarchically to achieve simplicity for these purposes. We will also describe two ′conservation laws of workpieces′ applicable to manufacturing scheduling problems and then develop a complete state space representation. Some experiments and results will also be included. This approach can be used for both stochastic and deterministic dynamical systems in this area and can also be extended to other areas which require decision support.
文摘Salinity stress is amajor constraint on agricultural productivity,particularly in arid and semi-arid regions.This study evaluated the potential of Ascophyllum nodosum extract(ANE)in mitigating salinity-induced stress and enhancing the growth and physiological performance of Portulaca oleracea L.under NaCl concentrations of 0,50,70,and 100 mM for 50 days.A two-way ANOVA assessed the effects of NaCl concentration,ANE treatment,and their interaction.The results showed that ANE significantly increased plant height at 50 mMNaCl(p=0.0011)but had no effect at higher salinity levels(p>0.05).Shoot dry weight was significantly influenced by the interaction of NaCl and ANE(p=0.0064),with ANE increasing biomass at 0 mM but decreasing it at 100 mM NaCl.However,ANE did not significantly affect root dry weight(p>0.05).Physiological responses indicated a significant increase in proline content at 50mMNaCl(p=0.0011),supporting improved osmotic adjustment.Total soluble protein was significantly enhanced at all salinity levels except 100 mM NaCl(p<0.01).Regarding ionic regulation,ANE had no significant effect on leaf sap pH(p>0.05)but increased electrical conductivity(EC)at 70 and 100 mM NaCl(p<0.01),suggesting a role in ion homeostasis under high salinity.Photosynthetic pigments responded positively to ANE,with significant increases in chlorophyll“a”(p<0.0001)and carotenoid content(p<0.0001),while chlorophyll“b”remained unchanged(p>0.05).These findings highlight ANE’s potential as a sustainable biostimulant for improving salinity tolerance,particularly at moderate NaCl levels.Future research should focus on molecular mechanisms and long-term field applications to optimize ANE’s role in enhancing soil and crop productivity under salinity stress.
文摘从花生种子中分离纯化花生过敏原Ara h 2,采用酶联免疫吸附试验(ELISA)、圆二色谱(CD)、ANS荧光探针及紫外可见(UV-Vis)光谱等方法,系统研究热加工对Ara h 2抗原性和结构的影响。结果表明:Ara h 2蛋白经55或70℃处理后其抗原性略有升高,经85,100或115℃处理后,其抗原性显著降低,且随着温度和时间的增加其抗原性均不断降低。CD色谱分析表明,Ara h 2经热处理后其二级结构发生变化;ANS荧光探针光谱显示,不同的热处理均导致Ara h 2表面疏水性增加。紫外光谱显示,不同温度对Ara h 2处理30 min后(除55℃外),其紫外吸收值均升高。Ara h 2经100℃处理不同时间后,其紫外吸收值均有增加。由此推断,花生过敏原Ara h 2的构象改变导致了其抗原性的降低。
文摘近似数量系统(Approximate Number System,ANS)指个体在不需要依赖于计算和数量符号的情况下,对一组数量进行近似表征的系统。通过总结近十年来研究者们在ANS的遗传和神经基础、干预训练等方面取得的新进展,指出未来应综合运用各种认知神经科学研究手段立足于ANS的基因和脑生理基础研究,进一步揭示ANS的本质和内在发生发展机制,并将有关研究发现运用到教育教学中,对数学困难儿童进行干预,以提高其数学能力和适应社会的能力。
