To determine the correlation between the working environment and the health status of employees in solar greenhouse, 1171 employees were surveyed. The results show the ＇Greenhouse diseases＇ are affected by many fact...To determine the correlation between the working environment and the health status of employees in solar greenhouse, 1171 employees were surveyed. The results show the ＇Greenhouse diseases＇ are affected by many factors. Among general uncomforts, the morbidity of the bone and joint damage is the highest and closely related to labor time and age. Planting summer squash and wax gourd more easilv cause skin pruritus.展开更多
In this paper,we propose a new way to construct the distribution function through the second-order polynomial approximation in terms of particle mass,momentum and energy.The new construction holds three distinguished ...In this paper,we propose a new way to construct the distribution function through the second-order polynomial approximation in terms of particle mass,momentum and energy.The new construction holds three distinguished features.First,the formulations are more concise as compared with the third-order truncated Hermite polynomial expansion which yields Grad’s 13-moment distribution function;Second,all moments of the present distribution function are determined from conservation laws;Third,these moments are closely linked to the most desirable variables,such as mass,momentum and energy.Then,this new distribution function is applied to construct a new gas kinetic flux solver.Numerical validations show that the proposed method recovers the Navier-Stokes solutions in the continuum regime.In addition,it outperforms Grad’s 13-moment distribution function in the transition regime,especially in the prediction of temperature and heat flux.展开更多
基金supported by the Profession Expert Group of Facility Cultivation and Engineering(CARS-25-D-03)
文摘To determine the correlation between the working environment and the health status of employees in solar greenhouse, 1171 employees were surveyed. The results show the ＇Greenhouse diseases＇ are affected by many factors. Among general uncomforts, the morbidity of the bone and joint damage is the highest and closely related to labor time and age. Planting summer squash and wax gourd more easilv cause skin pruritus.
基金supported by the National Natural Science Foundation of China(No.12302376)Natural Science Foundation of Jiangsu Province(No.BK20230905)+2 种基金Fundamental Research Funds for the Central Universities(No.30923011033)National Natural Science Foundation of China(No.52201329)MOE Tier 1 project at National University of Singapore(A-0005235-01-00).
文摘In this paper,we propose a new way to construct the distribution function through the second-order polynomial approximation in terms of particle mass,momentum and energy.The new construction holds three distinguished features.First,the formulations are more concise as compared with the third-order truncated Hermite polynomial expansion which yields Grad’s 13-moment distribution function;Second,all moments of the present distribution function are determined from conservation laws;Third,these moments are closely linked to the most desirable variables,such as mass,momentum and energy.Then,this new distribution function is applied to construct a new gas kinetic flux solver.Numerical validations show that the proposed method recovers the Navier-Stokes solutions in the continuum regime.In addition,it outperforms Grad’s 13-moment distribution function in the transition regime,especially in the prediction of temperature and heat flux.
