>>> 哲学 经济学 法学 教育学 文学 历史学 理学 工学 农学 医学 军事学 管理学 旅游学 文化学
搜索结果: 1-15 共查到DECLINE相关记录132条 . 查询时间(0.086 秒)
Fragmentation has long been considered the primary cause for ecosystem degradation and biodiversity loss worldwide. Forest fragmentation affects ecosystem functioning and biodiversity in multiple ways...
New research demonstrates that a decline in the concentration of atmospheric CO2 played a major role in driving Earth's climate from a warm greenhouse into a cold icehouse world around 34 million year...
Elephants and their forebears were pushed into wipeout by waves of extreme global environmental change, rather than overhunting by early humans, according to new research.
Since the mid-1980s, the percentage of precipitation that becomes streamflow in the Upper Rio Grande watershed has fallen more steeply than at any point in at least 445 years, according to a new study...
A new analysis of decades of data on oceans across the globe has revealed that the amount of dissolved oxygen contained in the water – an important measure of ocean health – has been declining for mor...
An insect infestation that is killing hemlock trees in New England forests is having a significant impact on the water resources of forested ecosystems that provide essential water supplies to one of ...
Arctic sea ice in recent decades has declined even faster than predicted by most models of climate change. Many scientists have suspected that the trend now underway is a combination of global warming...
The number of postdoctoral researchers employed at federally funded research and development centers (FFRDCs) rose to 2,696 in 2015, the first increase seen after two consecutive years of declines, ac...
Population explosion is considered to be one of the most crucial problems in the world. However, in Japan, the opposite problem: population decline has become serious now. Japanese population is estim...
Factors in the decline of coastal ecosystems.
A buildup of plaque and dysfunctional proteins in the brain are hallmarks of Alzheimer’s disease. While much Alzheimer’s research has focused on accumulation of the protein amyloid beta, researchers h...
Introduction: Although it is well accepted that peak HR (HRpeak) decreases with age, there is no clear consensus on the rate of this decline and the influence of cardiorespiratory fitness (CRF) on the...
Researchers from Princeton University have identified genes important for age-related cognitive declines in memory in adult worm neurons, which had not been studied previously. The research, published...
A new Kansas State University study finds that the over-tapping of the High Plains Aquifer's groundwater beyond the aquifer's recharge rate peaked in 2006. Its use is projected to decrease by roughly ...
This paper analyzes qualitatively and quantitatively the effects of declining mortality rates on fertility, education and economic growth. The analysis demonstrates that if individuals are pru...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...