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Evolutionary mechanisms and practical significance of reproductive success and clonal diversity in unisexual vertebrate polyploids

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Science China(Life Sciences) 2024年第3期67卷 449-459页

作者： Meng Lu Li Zhou Jian-Fang gui State Key Laboratory of Freshwater Ecology and Biotechnology Hubei Hongshan Laboratorythe Innovation Academy of Seed DesignInstitute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China

Unisexual reproduction is generally relevant to polyploidy, and unisexual vertebrates are often considered an evolutionary “dead end” due to the accumulation of deleterious mutations and absence of genetic diversity. However, some unisexual polyploids have developed strategies to avoid genomic decay, and thus provide ideal models to unveil unexplored evolutionary mechanisms, from the reproductive success to clonal diversity creation. This article reviews the evolutionary mechanisms for overcoming meiotic barrier and generating genetic diversity in unisexual vertebrates, and summarizes recent research advancements in the polyploid Carassius complex. Gynogenetic gibel carp(Carassius gibelio) is a unique amphitriploid that has undergone a recurrent autotriploidy and has overcome the bottleneck of triploid sterility via gynogenesis. Recently, an efficient strategy in which ploidy changes, including from amphitriploid to amphitetraploid, then from amphitetraploid to novel amphitriploid, drive unisexual-sexual-unisexual reproduction transition and clonal diversity has been *** on this new discovery, multigenomic reconstruction biotechnology has been used to breed a novel strain with superior growth and stronger disease resistance. Moreover, a unique reproduction mode that combines both abilities of ameiotic oogenesis and sperm-egg fusion,termed as ameio-fusiongensis, has been discovered, and it provides an efficient approach to synthesize sterile allopolyploids. In order to avoid ecological risks upon escape and protect the sustainable property rights of the aquaculture seed industry, a controllable fertility biotechnology approach for precise breeding is being developed by integrating sterile allopolyploid synthesis and gene-editing *** review provides novel insights into the origin and evolution of unisexual vertebrates and into the attempts being made to exploit new breeding biotechnologies in aquaculture.

关键词： unisexual vertebrates polyploidy reproduction transition clonal diversity precise breeding genomic reconstruction controllable fertility

Generation of input spectrum for electrolysis stack degradation test applied to wind power PEM hydrogen production

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Global Energy Interconnection 2024年第4期7卷 462-474页

作者： Yanhui Xu Guanlin Li Yuyuan gui Zhengmao Li School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing 102206P.R.China School of Electrical Engineering Aalto UniversityFinland

Hydrogen production by proton exchange membrane electrolysis has good fluctuation adaptability,making it suitable for hydrogen production by electrolysis in fluctuating power sources such as wind ***,current research on the durability of proton exchange membrane electrolyzers is *** the typical operating conditions of wind power electrolysis for hydrogen production can provide boundary conditions for performance and degradation tests of electrolysis *** this study,the operating condition spectrum of an electrolysis stack degradation test cycle was *** on the rate of change of the wind farm output power and the time-averaged peak-valley difference,a fluctuation output power sample set was *** characteristic quantities that played an important role in the degradation of the electrolysis stack were *** reduction of the operating data was performed using principal component *** analysis of the data segments was completed using an improved Gaussian mixture clustering *** the annual output power data of wind farms in Northwest China with a sampling rate of 1 min as an example,the cyclic operating condition spectrum of the proton-exchange membrane electrolysis stack degradation test was *** preliminary simulation analysis,the typical operating condition proposed in this paper effectively reflects the impact of the original curve on the performance degradation of the electrolysis *** study provides a method for evaluating the degradation characteristics and system efficiency of an electrolysis stack due to fluctuations in renewable energy.

关键词： Hydrogen production by electrolysis of water Wind power Proton exchange membrane electrolyzer Gaussian mixture model Cyclic operating condition

CuO-ZnO-CeO_2/Al_2O_3催化剂的催化及表征

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石油化工高等学校学报 2015年第5期28卷 17-19,73页

作者：牟川川刘道胜贾秀峰桂建舟刘丹辽宁石油化工大学化学化工与环境学部辽宁抚顺113001 鄂尔多斯市东胜区煤矿安全监督管理站内蒙古鄂尔多斯017000 天津工业大学环境与化学工程学院天津380387

采用共沉淀法制备了用于催化湿式氧化工艺的CuO-ZnO-CeO2/Al2O3催化剂,采用X射线衍射(XRD)对催化剂进行了表征,并以实验室配置的苯酚溶液为目标污染物,考察了CuO-ZnO-CeO2/Al2O3催化剂的活性和稳定性。结果表明,Ce的加入有提高催化剂体... 详细信息

采用共沉淀法制备了用于催化湿式氧化工艺的CuO-ZnO-CeO2/Al2O3催化剂,采用X射线衍射(XRD)对催化剂进行了表征,并以实验室配置的苯酚溶液为目标污染物,考察了CuO-ZnO-CeO2/Al2O3催化剂的活性和稳定性。结果表明,Ce的加入有提高催化剂体系分散度的作用;催化剂中的活性组分Cu、Zn、Ce分别以CuO、ZnO、CeO2的形式存在,并成功负载于载体Al2O3;对于初始质量浓度为900mg/L的实验室配置苯酚溶液,在反应温度为180℃,压力为4MPa,搅拌速度为300r/min,催化剂加入量为0.1g/(100mL),反应时间30min时,化学需氧量(COD)去除率达到95%。

关键词：湿式氧化催化剂化学需氧量 CuO-ZnO-CeO2/Al2O3

A Deep Residual PLS for Data-Driven Quality Prediction Modeling in Industrial Process

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1777-1785页

作者： Xiaofeng Yuan Weiwei Xu Yalin Wang Chunhua Yang Weihua gui School of Automation Central South UniversityChangsha 410083China She is now with Guangzhou Electromechanical Technician College Guangzhou 510000China

Partial least squares(PLS)model is the most typical data-driven method for quality-related industrial tasks like soft ***,only linear relations are captured between the input and output data in the *** is difficult to obtain the remaining nonlinear information in the residual subspaces,which may deteriorate the prediction performance in complex industrial *** fully utilize data information in PLS residual subspaces,a deep residual PLS(DRPLS)framework is proposed for quality prediction in this *** by deep learning,DRPLS is designed by stacking a number of PLSs successively,in which the input residuals of the previous PLS are used as the layer *** enhance representation,nonlinear function is applied to the input residuals before using them for stacking highlevel *** each PLS,the output parts are just the output residuals from its previous ***,the output prediction is obtained by adding the results of each *** effectiveness of the proposed DRPLS is validated on an industrial hydrocracking process.

关键词： Deep residual partial least squares(DRPLS) nonlinear function quality prediction soft sensor

Effect of Ti and Ta content on the oxidation resistance of Co-Ni-based superalloys

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 351-361页

作者： Yuheng Zhang Zixin Li Yunwei gui Huadong Fu Jianxin Xie Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China Key Laboratory for Advanced Materials Processing(MOE) University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China

Co-Ni-based superalloys are known for their capability to function at elevated temperatures and superior hot corrosion and thermal fatigue ***,these alloys show potential as crucial high-temperature structural materials for aeroengine and gas turbine hot-end *** previous work elucidated the influence of Ti and Ta on the high-temperature mechanical properties of ***,the intricate interaction among elements considerably affects the oxidation resistance of *** this paper,Co-35Ni-10Al-2W-5Cr-2Mo-1Nb-xTi-(5−x)Ta alloys(x=1,2,3,4)with varying Ti and Ta contents were designed and compounded,and their oxidation resistance was investigated at the temperature range from 800 to 1000℃.After oxidation at three test conditions,namely,800℃for 200 h,900℃for 200 h,and 1000℃for 50 h,the main structure of the oxide layer of the alloy consisted of spinel,Cr_(2)O_(3),and Al_(2)O_(3)from outside to *** consisting of Ta,W,and Mo formed below the Cr_(2)O_(3)*** interaction of Ti and Ta imparted the highest oxidation resistance to 3Ti2Ta ***,an excessive amount of Ti or Ta resulted in an adverse effect on the oxidation resistance of the *** study reports the volatilization of W and Mo oxides during the oxidation process of Co-Ni-based cast superalloys with a high Al content for the first time and explains the formation mechanism of holes in the oxide *** results provide a basis for gaining insights into the effects of the interaction of alloying elements on the oxidation resistance of the alloys they form.

关键词： Co-Ni-based superalloys high-temperature oxidation Ti and Ta elements formation mechanism of holes

Multimodal Data-Driven Reinforcement Learning for Operational Decision-Making in Industrial Processes

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 252-254页

作者： Chenliang Liu Yalin Wang Chunhua Yang Weihua gui the School of Automation Central South UniversityChangsha 410083China IEEE

Dear Editor, This letter proposes a multimodal data-driven reinforcement learning-based method for operational decision-making in industrial processes. Due to the frequent fluctuations of feedstock properties and operating conditions in the industrial processes, existing data-driven methods cannot effectively adjust the operational variables. In addition, multimodal data such as images, audio.

关键词： processes modal adjust

纳米Cu(OH)_2/SiO_2催化剂的制备条件对糠醛加氢反应的影响

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石油炼制与化工 2010年第2期41卷 41-44页

作者：廉金超刘丹杨玉莲桂建舟辽宁石油化工大学化学与材料科学学院抚顺113001

通过共沉淀方法制备了用于糠醛加氢制糠醇的纳米Cu(OH)2/SiO2催化剂,并运用XRD和BET等手段对制备的催化剂进行表征;考察溶液的滴加方式、碱液浓度、反应温度及陈化时间等因素对催化剂催化效果的影响。结果表明,用并加法进行滴加,在碱液... 详细信息

通过共沉淀方法制备了用于糠醛加氢制糠醇的纳米Cu(OH)2/SiO2催化剂,并运用XRD和BET等手段对制备的催化剂进行表征;考察溶液的滴加方式、碱液浓度、反应温度及陈化时间等因素对催化剂催化效果的影响。结果表明,用并加法进行滴加,在碱液浓度2.8 mol/L、陈化时间1 h、制备温度30℃和搅拌速率400 r/min的条件下,制得的催化剂表现出较高的加氢性能,糠醛转化率为97%,糠醇选择性达96.6%。

关键词：纳米氢氧化铜共沉淀糠醛

磁性纳米粒子负载钯催化剂在C—C键偶联反应中的应用

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应用化学 2015年第1期32卷 19-26页

作者：冯翠兰刘建平桂建舟刘澜涛商丘师范学院化学化工学院河南商丘476000 辽宁石油化工大学化学与材料科学学院辽宁抚顺113000

磁性纳米粒子(MNPs)负载钯催化剂因具有高的催化活性及易于原位磁分离回收等优点而得到快速发展,成为一类具有广泛应用前景的纳米催化剂,在学术及工业领域均受到广泛的关注。本文对近年来MNPs负载钯催化剂在Suzuki、Heck等C—C偶联反应... 详细信息

磁性纳米粒子(MNPs)负载钯催化剂因具有高的催化活性及易于原位磁分离回收等优点而得到快速发展,成为一类具有广泛应用前景的纳米催化剂,在学术及工业领域均受到广泛的关注。本文对近年来MNPs负载钯催化剂在Suzuki、Heck等C—C偶联反应中的应用研究进行简要阐述,并对其发展前景进行了展望。

关键词：磁性纳米粒子负载钯催化剂 C-C键偶联反应 Suzuki偶联反应 Heck偶联反应

环己烷在Au-Co/HZSM-5催化剂上选择性氧化的研究

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石油炼制与化工 2008年第2期39卷 12-15页

作者：任永峰桂建舟丛茂生宋丽娟辽宁石油化工大学石油化工学院辽宁省石油化工重点实验室抚顺113001

采用浸渍法制备了Au-Co/HZSM-5催化剂,并研究以空气为氧化剂的环己烷选择性氧化反应。结果表明,在Au-Co/HZSM-5催化剂中Co、Au的质量分数分别为5.0%和0.3%时活性最好;以该剂作为催化剂催化环己烷氧化反应,在反应压力4.0MPa、反应温度41... 详细信息

采用浸渍法制备了Au-Co/HZSM-5催化剂,并研究以空气为氧化剂的环己烷选择性氧化反应。结果表明,在Au-Co/HZSM-5催化剂中Co、Au的质量分数分别为5.0%和0.3%时活性最好;以该剂作为催化剂催化环己烷氧化反应,在反应压力4.0MPa、反应温度410 K的条件下反应300min,可使环己烷的转化率达到12.4%,环己酮和环己醇的总选择性达到95.3%。Au-Co/HZSM-5催化剂重复使用4次后活性略有下降。

关键词：环己烷环己酮环己醇分子筛氧化催化剂