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| 1 | PROPER CONDITIONS OF MESHING FOR Hy-Vo SILENT CHAIN AND SPROCKET显示文摘Hy-Vo 沉默的链和链轮齿的合适的协调为与更多的效率和更少的噪音认识到沉默的链的传播是重要的。与切的链轮齿和转动在 Hy-Vo 沉默的链的主题 shing 理论的学习上基于与壁炉内部的一锅架用机器制造链轮齿的原则,为 Hy-Vo 沉默的链和链轮齿协调的合适的条件与考虑的 Hy-Vo 沉默的链的可变沥青特征被提出,并且连接牙齿压力角度的价值对链轮齿牙齿压力角度的价值不相等的条件上的合适的协调设计方法被学习。实验证明这个新设计方法是可行的。另外,沥青,链轮齿牙齿压力角度和链轮齿补遗圆的 fillet 半径的设计被学习。为指导切 Hy-Vo 沉默的链链轮齿的壁炉内部的一锅架的设计关键的 Itis。 | MENG Fanzhong LI Chun CHENG Yabing | 2007 | Chinese Journal of Mechanical Engineering2007，20，4： | 16 |
| 2 | EXPERIMENTAL STUDY ON HIGH-SPEED CHARACTERISTICS OF AUTOMOTIVE ENGINE OIL-PUMP CHAIN显示文摘The high-speed multi-cycle impact and speed, load fluctuant characteristics of a kind of narrow-width automotive engine oil-pump chain 06BN-1 are studied through engine assembly and road-drive tests to satisfy the light-weight demand of engine. The worn surface morphologies of rubbing area between pin, bush and roller are also analyzed based on scanning electron microscope. The results show that the main wear mechanism of automotive engine oil-pump chain is fatigue wear, and it's failure mechanism is the forming, extending and flaking of cracks on top layer of pin and bush. Pin and bush both occurred cycle-soften phenomenon, and roller occurred cycle-harden. Fretting wear is one of the most important 'fall to pieces' failure causes of automotive chain. Ensuring sufficient strength and plasticity of roller, as well as adopting suitable shaping technology are the effective methods to increase its resistance to multi-cycle impact. | CHENG Yabing MENG Fanzhong XU Hanxue WU Jianming | 2007 | Chinese Journal of Mechanical Engineering2007，20，1： | 8 |
| 3 | Occurrence and Roles of Comammox Bacteria in Water and Wastewater Treatment Systems:A Critical Review显示文摘Nitrogen removal is a critical process in water treatment plants(WIPs)and wastewater treatment plants(WWTPs).The recent discovery of a novel bacterial process,complete ammonia oxidation(comammox,CMX),has refuted a century-long perception of the two-step conversion of NH3to NO3-.Compared with canonical nitrifiers,CMX bacteria offer undeniable advantages,such as a high growth yield propensity and adaptability to nutrient-and growth-limiting conditions,which collectively draw attention to validate the aptness of CMX bacteria to wastewater treatment.As there has been no comprehensive review on the relevance of CMX bacteria for sustainable water and wastewater treatment,this review is intended to discuss the roles and applications of CMX in the removal of nitrogen and pollutants from water and wastewater.We took into account insights into the metabolic versatilities of CMX bacteria at the clade and subclade levels.We focused on the distribution of CMX bacteria in engineered systems,niche differentiation,co-occurrence and interactions with cano nical nitrifiers for a better understanding of CMX bacteria in terms of their ecophysiology.Conceptualized details on the reactor adaptability and stress response of CMX bacteria are provided.The potential of CMX bacteria to degrade micropollutants either directly or co-metabolically was evaluated,and these insights would be an indispensable advantage in opening the doors for wider applications of CMX bacteria in WWTPs.Finally,we summarized future directions of research that are imperative in improving the understanding of CMX biology. | Naga Raju Maddela Zhihao Gan Yabing Meng Fuqiang Fan Fangang Meng | 2022 | Engineering2022，，10： | 0 |
| 4 | Genome-resolved metagenomic analysis reveals different functional potentials of multiple Candidatus Brocadia species in a full-scale swine wastewater treatment system显示文摘The increasing application of anammox processes suggests their enormous potential for nitrogen removal in wastewater treatment facilities.However,the functional potentials and ecological differentiation of cooccurring anammox species in complex ecosystems have not been well elucidated.Herein,by utilizing functional reconstruction and comparative genome analysis,we deciphered the cooccurring mechanisms of four Candidatus Brocadia species that were spontaneously enriched in a full-scale swine wastewater treatment system.Phylogenetic analysis indicated that species SW172 and SW745 were closely related to Ca.Brocadia caroliniensis and Ca.Brocadia sapporoensis,respectively,whereas the dominant species SW510 and SW773,with a total average abundance of 34.1%,were classified as novel species of the genus Ca.Brocadia.Functional reconstruction revealed that the novel species SW510 can encode both cytochrome cd1-type nitrite reductase and hydroxylamine oxidase for nitrite reduction.In contrast,the detected respiratory pentaheme cytochrome c nitrite reductase and acetate kinase genes suggested that SW773 likely reduced nitrite to ammonium with acetate as a carbon source.Intriguingly,the presence of genes encoding urease and cyanase indicated that both novel species can use diverse organic nitrogen compounds in addition to ammonia and nitrite as substrates.Taken together,the recovery and comparative analysis of these anammox genomes expand our understanding of the functional differentiation and cooccurrence of the genus Ca.Brocadia in wastewater treatment systems. | Yabing Meng Depeng Wang Zhong Yu Qingyun Yan Zhili He Fangang Meng | 2023 | Frontiers of Environmental Science & Engineering2023，17，1： | 0 |
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