The problem of soil pollution has not only destroyed the balance of the whole nature and ecological system, but also caused danger to human safety. The state must determine the important position of the eco-environmen...The problem of soil pollution has not only destroyed the balance of the whole nature and ecological system, but also caused danger to human safety. The state must determine the important position of the eco-environmental protection inspector to ensure the efficient implementation of the states responsibility for the prevention and control of soil pollution, so as to prevent all policies, measures and systems from becoming formalistic and thus promote the process of social and economic transformation and upgrading in China. The full text elaborated the current working condition of the soil pollution control deployment, analyzed the characteristics of comprehensively implementing the land control legislation, explored the construction approach of the soil pollution control system, and discussed the countermeasures of promoting the effective implementation of the soil pollution control responsibility by the ecological environment inspector, which provided reference for the actual work.展开更多
Chloroplast or mitochondrial dysfunctions are known to induce global changes at the cellular level.This occurs through the implementation of retrograde responses emanating from the organelles and influencing nuclear g...Chloroplast or mitochondrial dysfunctions are known to induce global changes at the cellular level.This occurs through the implementation of retrograde responses emanating from the organelles and influencing nuclear gene expression.Organellar instability broadly impacts cellular function and frequently leads to defects in cell cycle progression(Figure 1A).展开更多
The spatial impulse response（SIR） method is often used as the ＇gold standard5 in simulation of transient acoustic wave fields due to its high accuracy in the linear domain.However, a high sampling frequency is ofte...The spatial impulse response（SIR） method is often used as the ＇gold standard5 in simulation of transient acoustic wave fields due to its high accuracy in the linear domain.However, a high sampling frequency is often required in order to achieve the high accuracy. As a result, a large amount of data has to be processed. In this paper a fast approach for computing spatial impulse response is proposed to reduce the computation burden. The proposed approach is developed by employing the relationship of SIRs at observed points and SIRs of the projection points on the transducer surface. Two critical parameters used in the proposed approach, the calculation sampling frequency and the interpolation sampling frequency, are then analyzed.Results show that for a 2.25 MHz rectangular transducer with the size of 5 mm×10 mm,a calculation sampling frequency of 1000 MHz and an interpolation sampling frequency of500 MHz can achieve superior performance while improving the computation efficiency 18 times than the direct solving.展开更多
文摘The problem of soil pollution has not only destroyed the balance of the whole nature and ecological system, but also caused danger to human safety. The state must determine the important position of the eco-environmental protection inspector to ensure the efficient implementation of the states responsibility for the prevention and control of soil pollution, so as to prevent all policies, measures and systems from becoming formalistic and thus promote the process of social and economic transformation and upgrading in China. The full text elaborated the current working condition of the soil pollution control deployment, analyzed the characteristics of comprehensively implementing the land control legislation, explored the construction approach of the soil pollution control system, and discussed the countermeasures of promoting the effective implementation of the soil pollution control responsibility by the ecological environment inspector, which provided reference for the actual work.
基金supported by grants from the Agence Nationale de la Recherche(21-CE20-0027)the University of Strasbourg.
文摘Chloroplast or mitochondrial dysfunctions are known to induce global changes at the cellular level.This occurs through the implementation of retrograde responses emanating from the organelles and influencing nuclear gene expression.Organellar instability broadly impacts cellular function and frequently leads to defects in cell cycle progression(Figure 1A).
基金supported by the National Natural Science Foundation of China(51074121)the China Postdoctoral Science Foundation(2015M572653XB)+1 种基金the Doctoral Fund of Xi'an University of Science and Technology(2014QDJ003),the Cultivation Fund of Xi'an University of Science and Technology(201332)Scientific Research Program Funded by Shaanxi Provincial Education Department
文摘The spatial impulse response（SIR） method is often used as the ＇gold standard5 in simulation of transient acoustic wave fields due to its high accuracy in the linear domain.However, a high sampling frequency is often required in order to achieve the high accuracy. As a result, a large amount of data has to be processed. In this paper a fast approach for computing spatial impulse response is proposed to reduce the computation burden. The proposed approach is developed by employing the relationship of SIRs at observed points and SIRs of the projection points on the transducer surface. Two critical parameters used in the proposed approach, the calculation sampling frequency and the interpolation sampling frequency, are then analyzed.Results show that for a 2.25 MHz rectangular transducer with the size of 5 mm×10 mm,a calculation sampling frequency of 1000 MHz and an interpolation sampling frequency of500 MHz can achieve superior performance while improving the computation efficiency 18 times than the direct solving.
