Research Progress on Influencing Factors of Postpartum Body Shape Recovery

2021 ◽  
2013 ◽  
Vol 448-453 ◽  
pp. 3013-3016
Author(s):  
Ri Ci Meng ◽  
Yuan Zhang ◽  
Xian Ning Mo ◽  
Zong Qiang Zhu ◽  
Liang Liang Tan

The development and technology of the hydrogen production from organic wastewaters through anaerobic fermentation were summarized. A expound and conclusion about the anaerobic fermentation types and the influencing factors of hydrogen production were included. Some present factors which obstruct the development of the hydrogen production through anaerobic fermentation were raised which made a prospect of the bio-hydrogen anaerobic fermentation technology.


2021 ◽  
Vol 16 ◽  
Author(s):  
Xiaodong Yu ◽  
Shiwei Zhan ◽  
Dianbin Huang ◽  
Fan Sun ◽  
Fakun Wang ◽  
...  

Background: Sliding bearing is a kind of bearing that works under sliding friction, which has the characteristics of stable operation, safety and reliability and noiseless. With the technological progress of the machinery industry, modern machinery and equipment is developing in the direction of high speed and heavy load, its power is getting higher and higher, and the working environment is getting worse, so plain bearings are more and more widely used. Objective: In order to improve the lubricating performance of sliding bearings, the influencing factors of lubricating performance of sliding bearings are summarized and commented. Methods: The research progress and achievements at home and abroad are summarized from three aspects: influencing factors of lubrication performance of radial sliding bearings, thrust sliding bearings and influencing factors of lubricating oil on lubrication performance of sliding bearings, which provides reference for the future development of sliding bearings. Results: The study discusses the experimental method, simulation process and experimental results of the factors affecting the lubrication performance of sliding bearing. Conclusion: The texture, deformation, surface morphology of oil cavity, eccentric load and flow state of sliding bearings all affect the lubricating performance of sliding bearings, and lubricating oil also affects the lubricating performance of sliding bearings.


2021 ◽  
Vol 692 (3) ◽  
pp. 032050
Author(s):  
Bin Zhang ◽  
Xi Hu ◽  
Yanyuan Zhang ◽  
Yueyi Gao ◽  
Xiaoming Wang ◽  
...  

2021 ◽  
Vol 4 (4) ◽  
pp. 43
Author(s):  
Yongmei Hou

Learning burnout is a common psychological problem of college students, which seriously affects college students' academic achievement and physical and mental health, wastes educational resources, and brings various hidden dangers to talent growth and social development. Starting from the definition of the concept of learning burnout, this paper introduces the dimension composition and measurement tools of college students' learning burnout, analyzes the influencing factors of college students' learning burnout, and puts forward the corresponding research prospects in view of the shortcomings of previous research.


2021 ◽  
Vol 257 ◽  
pp. 03019
Author(s):  
Yang Hui ◽  
yan Yujie ◽  
zhang Jiaqi

Nitrate-nitrogen pollution in water is a global problem. The research on the remediation technology of NO3--N polluted water has become a hot research direction in recent years. Biochar has a good adsorption effect on nitrate nitrogen because of its unique surface structure and rich surface properties. In this paper, the basic properties of biochar are introduced, and the research progress on the adsorption effect of modified biochar for nitrate nitrogen removal and the influencing factors are summarized. The problems and shortcomings in the current technology field were analyzed, and the research prospect and direction of using biochar to remove nitrate nitrogen were pointed out.


资源科学 ◽  
2021 ◽  
Vol 43 (8) ◽  
pp. 1687-1699
Author(s):  
Dan ZHANG ◽  
Min WANG ◽  
Mengyu GAN ◽  
Linsheng YANG ◽  

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