system degradation

The unreasonable land use will result in the degradation and even loss of eco-system services, which would affect the sustainable development of our society.

然而不合理的土地利用会使生态系统提供的服务功能衰减甚至丧失，这会影响人类社会的可持续发展。

互联网摘选

500 h continuous aging test on PBI system high temperature PEMFC was conducted, and it is found that the agglomeration of cathode catalyst was the main reason for the performance degradation in the aging test.

本文开展了基于电化学测试技术的PBI体系高温PEMFC的500h连续寿命实验，指出催化剂颗粒长大是性能衰减的主要原因；

互联网摘选

The Effect on Thermal Degradation of Medical Latex Product of Different Accelerant System

不同促进剂体系对医用天然胶乳制品热降解的影响

互联网摘选

The decision-directed channel estimation ( DDCE) can't track the channel variations in fast fading channels, and thus the system performance degradation occurs.

在快衰落信道情况下，基于判决指导信道估计（DDCE）法不能够很好的跟踪信道参数的变化，使得系统性能产生很大的恶化。

互联网摘选

The strains of phenol degradation bacteria with high efficiency were screened from activated sludge of the aeration basin of the present biochemical treatment system in Harbin Gasification Plant by advanced bio-engineering technology.

方法从哈尔滨气化厂现有生化处理系统的曝气池活性污泥中筛选高效脱酚菌。

互联网摘选

Over disafforestation has nearly resulted in the natural ecological system on the brink of collapse, soil fertility loss and soil erosion, therefore, the degradation of ecosystems has impacted directly on the agricultural development.

过度砍伐森林对生态的破坏，造成自然生态系统濒于崩溃，土壤营养损耗，由此导致水土流失日益严重，生态环境退化直接影响到农业。

互联网摘选

The threshold for the coastal system to climate change, over which irreversible degradation will occur, is still beyond our present knowledge, considering human proactive adaptability, and multi-factors with their complex relationship with the deltaic environments.

由于影响长江三角洲环境的因素众多，关系复杂，以及人类的主动适应能力，目前难以确定三角洲系统的气候变化阈值，即超过它系统将发生不可逆转的衰退。

互联网摘选

The data of thermal oxidative degradation kinetics of composites showed the activation energy of system was significantly improved due to the addition of fillers.

热氧降解动力学测试表明阻燃填料的加入能大幅度提高复合材料的热降解活化能和分解温度及热氧稳定性。

互联网摘选

Study on Degradation of Methyl Orange, Alizarine Red and Crystal Violet Using the Photocatalytic System of Mn~ ( 2+)/ H_2O_2

Mn~（2+）/H2O2光催化体系对染料甲基橙、茜素红、结晶紫的降解研究

互联网摘选

Measurement noise of sensor in guidance system is the main cause of degradation of guidance performance.

测试信息不完备、测量噪声等因素是制约结构损伤识别方法应用的主要难点.

网络文摘精选