Upper tolerance limit for the largest observation from censored samples

1981 ◽  
Vol 9 (2) ◽  
pp. 225-228 ◽  
Author(s):  
Yoshikazu Takada
Keyword(s):  
Tolerance Limit ◽  
Censored Samples ◽  
Upper Tolerance Limit

scholarly journals Water Level Fluctuation Requirements of Emergent Macrophyte Typha angustifolia L.

Water ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 127
Author(s):  
Zhen-Dong Yang ◽  
Sai-Bo Yuan ◽  
Xue-Qin Liu ◽  
Hong-Zhu Wang
Keyword(s):  
Life History ◽  
Water Level ◽  
Water Depth ◽  
Tolerance Limit ◽  
Seedling Stage ◽  
Water Level Fluctuations ◽  
Typha Angustifolia ◽  
Level Fluctuation ◽  
Yangtze Floodplain ◽  
Upper Tolerance Limit

The management of water levels in wetlands is of great importance for the wetland ecosystem, including the conservation and revitalization of plants. However, the water level requirements (WLRs) of wetland plants have not been well investigated. In this study, Typha angustifolia was selected as an experimental plant species. Combining field investigation and simulation experiments, the relationship between the development status of this species and water level fluctuations (WLFs) in different life-history stages were analyzed. The results show that populations in the Yangtze floodplain, China, had two phenotypic forms ‘tall’ and ‘short’, and that these were distributed in lakes with intermittent or quasi-natural fluctuations and reservoir-like fluctuations, respectively. Lakes with high amplitude (>3.2 m) water fluctuations did not contain T. angustifolia. We investigated the distribution and growth of T. angustifolia in lakes of varying hydrology across the Yangtze floodplain, seeking to define its tolerance of water-level fluctuations and submergence at different stages in its life cycle. The upper tolerance limit of static submerged water depth was bounded by 1.5 times the height of plants in the seedling stage, and the upper tolerance limit of the submergence rate in the seedling stage was the average growth rate of seedling, 1.5 cm/d. The plant height had a positive linear correlation with amplitude and water depth from June to July. The autumn biomass was significantly negatively correlated with amplitude and water depth from January to May. This paper is perhaps the first case study on water level fluctuation requirements (WLFRs) of emergent macrophytes. It systematically assessed the WLFRs of T. angustifolia in each life-history stage, and established a comprehensive WLFR conceptual model. The results of this study could provide a quantitative operational basis for the protection and restoration of this species in Yangtze floodplain lakes.

Increasing the Removal Efficiency of CPAs by the Dilution-Concentration Method: Adaptive Optimization of Diluent Flow Rates

2013 ◽  
Author(s):  
Heyuan Qiao ◽  
Weiping Ding ◽  
Sijie Sun ◽  
Gang Zhao ◽  
Dayong Gao
Keyword(s):  
Flow Rate ◽  
Blood Cells ◽  
Tolerance Limit ◽  
Optimization Strategy ◽  
Adaptive Optimization ◽  
Rapid Preparation ◽  
Flow Rates ◽  
Cryoprotective Agents ◽  
Concentration Method ◽  
Upper Tolerance Limit

A dilution-concentration method for removing cryoprotective agents from cryopreserved blood was proposed in our previous work. In this study, the method was optimized adaptively by adjusting diluent flow rates. In the optimization, the diluent flow rate was set to vary with time, the tendency of which was designed to automatically minimize the washing time whereas the volume maximum of red blood cells was guaranteed below the upper tolerance limit. The results show that the optimized diluent flow rate decreases firstly and then increases rapidly. By doing so, the washing time is reduced by about 50%. In practice, the optimization strategy presented here will be very useful in the rapid preparation of cryopreserved blood for clinical use.

PHYSICO-CHEMICAL ASPECTS OF YAMUNA RIVER AT GOKUL BARRAGE, MATHURA (UP) INDIA

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
AJAY KUMAR RAJAWAT ◽  
PRAVEEN KUMAR
Keyword(s):  
Water Samples ◽  
Suspended Solids ◽  
Total Dissolved Solids ◽  
Tolerance Limit ◽  
Chemical Condition ◽  
Yamuna River ◽  
Dissolved Solids ◽  
Time Period ◽  
Physico Chemical ◽  
Almost All

An attempt has been made to study the Physico-chemical condition of water of Yamuna River at Gokul Barrage, Mathura, (UP). The time period of study was July 2015 to June 2016. Three water samples were selected from different sites in each month for study. The parameters studied were Temperature, Turbidity, pH, DO, BOD, COD, Total Dissolved Solids and Suspended Solids. Almost all the parameters were found above the tolerance limit.

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