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除尘技术研究进展和袋式除尘ISO标准（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第1期19卷 21-33页

作者： cheng-hang zheng Chikao KANAOKA State Key Laboratory of Clean Energy Utilization State Environmental Protection Center for Coal-fired Air Pollution Control Zhejiang University Hangzhou 310027 China Kanazawa University Kanazawa 920-1161 Japan

目的:分析当前最新的针对烟气中颗粒物的高效脱除技术,包括静电除尘和袋式除尘的提效方法、原理以及所能达到的效果等;对研究现状进行评述和对未来发展做出展望,并介绍袋式除尘的相关ISO标准。创新点:1.总结了各参数对静电除尘器(包括... 详细信息

目的:分析当前最新的针对烟气中颗粒物的高效脱除技术,包括静电除尘和袋式除尘的提效方法、原理以及所能达到的效果等;对研究现状进行评述和对未来发展做出展望,并介绍袋式除尘的相关ISO标准。创新点:1.总结了各参数对静电除尘器(包括低低温静电除尘、高温静电除尘和湿式静电除尘等)除尘效率的影响;2.分析比较了不同结构形式的滤袋并总结了适应更高过滤要求的新型过滤材料。方法:1.通过数据分析,比较不同粒径、比电阻和温度对静电除尘器除尘效率的影响,并提出相关改进措施;2.比较不同形式滤袋的收尘特点,结合ISO标准和当前工业需求,对袋式除尘进行展望。结论:1.为保证除尘效率,对于不同特性的粉尘,可采取不同形式的静电除尘器增效技术;2.为满足更高的过滤要求,在袋式除尘器方面,急需开发新型过滤材料和优化清灰技术,以适应更高的温度和满足更高的清灰要求。

关键词：除尘静电除尘器滤袋 ISO标准

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大气污染治理助推绿色发展（英文）

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第1期19卷 1-4页

作者： Xiang GAO cheng-hang zheng State Key Laboratory of Clean Energy Utilization State Environmental Protection Center for Coal-fired Air Pollution Control Zhejiang University

化石燃料尤其是煤炭利用过程中排放的二氧化硫、氮氧化物、颗粒物和重金属等污染物以及二氧化碳等温室气体已引起国内外的广泛关注,并已成为能源环境领域的研究热点。近几年,国内外在烟气污染物控制以及CO_2捕集和利用方面取得了显著的... 详细信息

化石燃料尤其是煤炭利用过程中排放的二氧化硫、氮氧化物、颗粒物和重金属等污染物以及二氧化碳等温室气体已引起国内外的广泛关注,并已成为能源环境领域的研究热点。近几年,国内外在烟气污染物控制以及CO_2捕集和利用方面取得了显著的进展。然而如何进一步提高污染物的脱除效率、如何实现多污染物高效协同脱除以及如何实现污染物的资源化利用等方面尚需进一步研究;如何实现CO_2的资源化和循环利用也得到国际上的普遍关注,亟需基础研究支撑技术突破。本专辑收集了在该研究领域具有影响力的研究人员的最新研究成果和观点,介绍了该领域的最新研究进展,希望能帮助读者了解相关研究工作并促进研究人员开展讨论,推进该领域的基础研究和技术创新,为实现能源消费清洁化、低碳化和绿色化提供科学和技术支撑。

关键词：化石燃料大气污染物二氧化碳绿色化

Random gradient-free method for online distributed optimization with strongly pseudoconvex cost functions

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Control Theory and Technology 2024年第1期22卷 14-24页

作者： Xiaoxi Yan cheng Li Kaihong Lu hang Xu School of Electrical and Information Engineering Jiangsu UniversityZhenjiang212013JiangsuChina College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao266590ShandongChina

This paper focuses on the online distributed optimization problem based on multi-agent systems. In this problem, each agent can only access its own cost function and a convex set, and can only exchange local state information with its current neighbors through a time-varying digraph. In addition, the agents do not have access to the information about the current cost functions until decisions are made. Different from most existing works on online distributed optimization, here we consider the case where the cost functions are strongly pseudoconvex and real gradients of the cost functions are not available. To handle this problem, a random gradient-free online distributed algorithm involving the multi-point gradient estimator is proposed. Of particular interest is that under the proposed algorithm, each agent only uses the estimation information of gradients instead of the real gradient information to make decisions. The dynamic regret is employed to measure the proposed algorithm. We prove that if the cumulative deviation of the minimizer sequence grows within a certain rate, then the expectation of dynamic regret increases sublinearly. Finally, a simulation example is given to corroborate the validity of our results.

关键词： Multi-agent system Online distributed optimization Pseudoconvex optimization Random gradient-free method

Recent progress in functional modification and crosslinking of bioprosthetic heart valves

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Regenerative Biomaterials 2024年第1期3卷 1-16页

作者： cheng zheng Li Yang Yunbing Wang National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China

Valvular heart disease(VHD),clinically manifested as stenosis and regurgitation of native heart valve,is one of the most prevalent cardiovascular diseases with high *** valve replacement surgery has been recognized as golden standard for the treatment of *** to the clinical application of transcatheter heart valve replacement technic and the excellent hemodynamic performance of bioprosthetic heart valves(BHVs),implantation of BHVs has been increasing over recent years and gradually became the preferred choice for the treatment of ***,BHVs might fail within 10-15 years due to structural valvular degeneration(SVD),which was greatly associated with drawbacks of glutaraldehyde crosslinked BHVs,including cytotoxicity,calcification,component degradation,mechanical failure,thrombosis and immune *** prolong the service life of BHVs,much effort has been devoted to overcoming the drawbacks of BHVs and reducing the risk of *** this review,we summarized and analyzed the research and progress on:(i)modification strategies based on glutaraldehyde crosslinked BHVs and(ii)nonglutaraldehyde crosslinking strategies for BHVs.

关键词： bioprosthetic heart valves modification crosslinking anticalcification antithrombosis

Strength and ductility optimization of HPDC AlSi8MgCuZn2 alloys by modifying pre-aging treatment

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China Foundry 2024年第4期21卷 343-351页

作者： Yuan-hang Jiang Hui-ting zheng Fei Liu Hai-dong Zhao National Engineering Research Center of Near-net Shape Forming for Metallic Materials South China University of TechnologyGuangzhou 510641China

Considering the components produced by high pressure die casting(HPDC)process usually with ultra-large sizes and complex morphologies,high temperature solid solution treatment is not a suitable method to further improve their mechanical *** this study,two-stage aging treatment with different pre-aging times was designed and employed to further improve the mechanical properties of HPDC Al8SiMgCuZn *** characteristics of precipitates were evaluated by a transmission electron microscope(TEM),and the precipitation strengthening mechanism was *** results reveal that the strengthening is mainly contributed by the precipitation ofβ″phase after two-stage aging,and the number density and size of the precipitates are significantly depended on the pre-aging *** number density of precipitates is increased with the pre-aging time prolonged from 0 h to 4 h,and then decreases with the further increase of pre-aging time from 4 h to 6 *** precipitates with the highest density and smallest size are observed after pre-aging for 4 *** pre-aged at 100℃for 4 h and then artificial aged at 200℃for 30 min,the yield strength of 207 MPa,ultimate tensile strength of 325 MPa and elongation of 7.6%are achieved.

关键词： high pressure die cast aluminum alloy microstructural heterogeneity mechanical properties precipitation strengthening two-stage aging

A historical review of hybrid rice breeding

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Journal of Integrative Plant Biology 2024年第3期66卷 532-545页

作者： Xiaoming zheng Fei Wei cheng cheng Qian Qian State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Yazhouwan National Laboratory Sanya City 572024China

The development of germplasm resources and advances in breeding methods have led to steady increases in yield and quality of rice (Oryza sativa L.). Three milestones in the recent history of rice breeding have contributed to these increases: dwarf rice breeding, hybrid rice breeding, and super rice breeding. On the 50th anniversary of the success of three-line hybrid rice,we highlight important scientific discoveries in rice breeding that were made by Chinese scientists and summarize the broader history of the field. We discuss the strategies that could be used in the future to optimize rice breeding further in the hope that China will continue to play a leading role in international rice breeding.

关键词： Chinese experience dwarf breeding hybrid rice breeding super rice breeding

Pannexins in the musculoskeletal system:new targets for development and disease progression

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Bone Research 2024年第2期12卷 255-269页

作者： Yan Luo Shengyuan zheng Wenfeng Xiao hang Zhang Yusheng Li Department of Orthopedics Xiangya HospitalCentral South UniversityChangshaHunan 410008China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan 410008China Department of Clinical Medicine Xiangya Medicine SchoolCentral South UniversityChangshaHunan 410008China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

During cell differentiation,growth,and development,cells can respond to extracellular stimuli through communication ***(Panx)family and connexin(Cx)family are two important types of channel-forming *** family contains three members(Panx1-3)and is expressed widely in bone,cartilage and *** there is no sequence homology between Panx family and Cx family,they exhibit similar configurations and *** to Cxs,the key roles of Panxs in the maintenance of physiological functions of the musculoskeletal system and disease progression were gradually revealed ***,we seek to elucidate the structure of Panxs and their roles in regulating processes such as osteogenesis,chondrogenesis,and muscle *** also focus on the comparison between Cx and *** a new key target,Panxs expression imbalance and dysfunction in muscle and the therapeutic potentials of Panxs in joint diseases are also discussed.

关键词： skeletal diseases system

New insight into Ca^(2+)-permeable channel in plant immunity

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Journal of Integrative Plant Biology 2024年第3期66卷 623-631页

作者： Wei Wang hang-Yuan cheng Jian-Min Zhou State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China Hainan Yazhou Bay Seed Laboratory Sanya 572025China

Calcium ions(Ca^(2+)) are crucial intracellular second messengers in eukaryotic cells. Upon pathogen perception, plants generate a transient and rapid increase in cytoplasmic Ca^(2+)levels, which is subsequently decoded by Ca^(2+)sensors and effectors to activate downstream immune responses. The elevation of cytosolic Ca^(2+)is commonly attributed to Ca^(2+)influx mediated by plasma membranelocalized Ca^(2+)–permeable channels. However, the contribution of Ca^(2+)release triggered by intracellular Ca^(2+)-permeable channels in shaping Ca^(2+)signaling associated with plant immunity remains poorly understood. This review discusses recent advances in understanding the mechanism underlying the shaping of Ca^(2+)signatures upon the activation of immune receptors, with particular emphasis on the identification of intracellular immune receptors as non-canonical Ca^(2+)-permeable channels. We also discuss the involvement of Ca^(2+)release from the endoplasmic reticulum in generating Ca^(2+)signaling during plant immunity.

关键词： Ca^(2+)-permeable channels endoplasmic reticulum phosphorylation plant immunity resistosome

Ensemble projections of climate and streamflow in a typical basin of semi-arid steppes in Mongolian Plateau of 2021-2100

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Advances in Climate Change Research 2024年第2期15卷 230-243页

作者： hang PAN Jian-Ping TANG Liang cheng Man-Chun LI Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology Nanjing UniversityNanjing 210023China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Key Laboratory of Mesoscale Severe Weather/Ministry of Education Nanjing UniversityNanjing 210023China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China

The Kherlen River is the main water source for Hulun Lake,the largest lake in northern *** to reduced inflow from the Kherlen River,Hulun Lake experienced rapid shrinkage at the beginning of the 21st century,posing a serious threat to the ecological security of northern ***,there is still a significant lack of projections regarding future climate change and its hydrological response in the Kherlen River *** study analyzed the projected climate and streamflow changes in the Kherlen River basin,a vital yet vulnerable international semi-arid steppes type basin.A combination of multi-model ensemble projection techniques,and the soil and water assessment tool(SWAT)model was employed to examine the spatio-temporal changes in precipitation,temperature,streamflow,and the associated uncertainties in the *** temperature(an increase of 1.84-6.42℃)and the precipitation(an increase of 15.0-46.0 mm)of Kherlen River basin are projected to increase by 2100,leading to a rise in streamflow(1.08-4.78 m^(3) s^(-1)).The upstream of the Kherlen River exhibits remarkable increasing trends in precipitation,which has a dominant influence on streamflow of Kherlen *** increases in streamflow are observed in April,August,September,and October compared to the reference period(1971-2000).These findings suggest a partial alleviation of water scarcity in the Kherlen River,but also an increased likelihood of hydrological extreme *** projected temperature increase in the Kherlen River basin exhibits the smallest uncertainty,while more pronounced uncertainties are found in precipitation and *** spread among the results of CMIP6 models is greater than that of CMIP5 models,with lower signal-to-noise ratio(SNR)values for temperature,precipitation,and streamflow.

关键词： Climate change Flow projection Uncertainty SWAT Mongolian Plateau