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试论货币投放量的“适度”问题
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作者 叶相治 《探索与争鸣》 1988年第3期20-21,共2页
今年经济工作的方针是要稳定经济,深化改革,突出的是要稳定物价。要稳定物价就要控制货币投放量。但是货币投放过少,也会影响经济的发展速度,减少社会总供给,并最终影响物价的稳定。因此,掌握适度的货币投放量是今年经济工作的一... 今年经济工作的方针是要稳定经济,深化改革,突出的是要稳定物价。要稳定物价就要控制货币投放量。但是货币投放过少,也会影响经济的发展速度,减少社会总供给,并最终影响物价的稳定。因此,掌握适度的货币投放量是今年经济工作的一个关键,也是一个难点。 展开更多
关键词 货币投放量 物价 经济增长率 中国 “适度”问题
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Nonlocal controllability for semilinear problems in Banach spaces
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作者 薛星美 吕忠 《Journal of Southeast University(English Edition)》 EI CAS 2008年第4期541-544,共4页
If A: D(A) X→X is a densely defined and closed linear operator, which generates a linear semigroup S (t) in Banach space X. The nonlocal control/ability for the following nonlocal semilinear problems: u' (t... If A: D(A) X→X is a densely defined and closed linear operator, which generates a linear semigroup S (t) in Banach space X. The nonlocal control/ability for the following nonlocal semilinear problems: u' (t) = Au (t) + Bx( t) + f( t, u(t) ), 0≤t ≤ T with nonlocal initial condition u(0) = u0 + g(u) is discussed in Banach space X. The results show that if semigroup S(t) is strongly continuous, the functionsf and g are compact and the control B is bounded, then it is nonlocally controllable. The nonlocal controllability for the above nonlocal problem is also studied when B and W are unbounded and the semigroup S(t) is compact or strongly continuous. For illustration, a partial differential equation is worked out. 展开更多
关键词 nonlocal problem nonlocal controllability mild solution completely continuous
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