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Ensemble habitat suitability modeling of stomatopods with Oratosquilla oratoria as an example

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Acta Oceanologica Sinica 2023年第4期42卷 93-102页

作者： Lisha Guan Xianshi jin Tao yang Xiujuan shan Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture and Rural AffairsQingdao 266071China shandong Provincial Key Laboratory of Fishery Resources and Ecological Environment National Field Observation and Research Center for Changdao Marine EcosystemYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China

Stomatopods are better known as mantis shrimp with considerable ecological importance in wide coastal waters globally. Some stomatopod species are exploited commercially, including Oratosquilla oratoria in the Northwest Pacific. Yet, few studies have published to promote accurate habitat identification of stomatopods, obstructing scientific management and conservation of these valuable organisms. This study provides an ensemble modeling framework for habitat suitability modeling of stomatopods, utilizing the O. oratoria stock in the Bohai Sea as an example. Two modeling techniques(i.e., generalized additive model(GAM) and geographical weighted regression(GWR)) were applied to select environmental predictors(especially the selection between two types of sediment metrics) that better characterize O. oratoria distribution and build separate habitat suitability models(HSM). The performance of the individual HSMs were compared on interpolation accuracy and ***, they were integrated to check whether the ensemble model outperforms either individual model, according to fishers’ knowledge and scientific survey data. As a result, grain-size metrics of sediment outperformed sediment content metrics in modeling O. oratoria habitat, possibly because grain-size metrics not only reflect the effect of substrates on burrow development, but also link to sediment heat capacity which influences individual thermoregulation. Moreover, the GWR-based HSM outperformed the GAM-based HSM in interpolation accuracy,while the latter one displayed better transferability. On balance, the ensemble HSM appeared to improve the predictive performance overall, as it could avoid dependence on a single model type and successfully identified fisher-recognized and survey-indicated suitable habitats in either sparsely sampled or well investigated areas.

关键词： habitat suitability stomatopod coastal fisheries predictor selection ensemble model

Fiber Bending Flexibility Evaluation by Worm-like Chain Model

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Chinese Journal of Polymer Science 2022年第5期40卷 526-531页

作者： Chao jin Hui Yu Chun-Fang Wu Hai-Bo Zhao shan-shan jin Yu-Liang yang Hong-Dong Zhang Institute for Preservation and Conservation of Chinese Ancient Books Fudan UniversityShanghai 200433China Statekey laboratory of Molecular Engineering of polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China

A new method for characterizing fiber bending flexibility was developed by worm-like chain model proposed by Kratky-Porod,[1]which was first introduced to the pulp and paper field in this *** the three types of pulps,the experimental results were compared with the KP chain model,and the resulting determination coefficients were all above 0.95,which proved that the model was feasible to be applied to these three *** relation between fiber bending rigidity and that of cellulosic chains inside was discussed to deduce the fiber bending *** flexibility of an individual fiber can be approximated as the contribution of that of all the cellulose chains *** this method,the fiber flexibility values were determined to be in the range of 0.6×10^(11)-3.5×10^(11)N^(-1)·m^(-2),which was comparable to that of the conventional methods recorded in the literature.

关键词： Worm-like chain Fiber persistence length Fiber bending flexibility

防护材料抗微生物悬浮液和血液穿透性能的评价

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解放军预防医学杂志 2011年第6期29卷 398-401页

作者：单金洋任衍菊杨荆泉陈剑王新为王永广金敏扬州大学环境科学与工程学院江苏扬州225000 军事医学科学院卫生学环境医学研究所军事医学科学院卫生装备研究所

目的对生物防护材料抗微生物悬浮液和人工合成血液的穿透性能进行评价,为高危生物污染环境作业人员防护服的研制提供科学依据。方法参照ISO 16604测试方法,以噬菌体Ph-iX174、脊髓灰质炎病毒、枯草杆菌黑色变种芽孢及白色念珠球菌作为... 详细信息

目的对生物防护材料抗微生物悬浮液和人工合成血液的穿透性能进行评价,为高危生物污染环境作业人员防护服的研制提供科学依据。方法参照ISO 16604测试方法,以噬菌体Ph-iX174、脊髓灰质炎病毒、枯草杆菌黑色变种芽孢及白色念珠球菌作为挑战微生物、人工合成血液作为渗透样品,检测TPU膜、TPU膜复合材料和PU涂层3种生物防护材料抗微生物悬浮液和人工合成血液的穿透性能。结果在常压和不同正压条件(1.75、3.5、7、14、20 kPa)下,分别经3种防护材料阻留作用5 min,均未检测出噬菌体Ph-iX174、脊髓灰质炎病毒、枯草杆菌黑色变种芽孢、白色念珠球菌,也未见人工合成血液穿透现象。结论该生物防护材料具有抗微生物悬浮液和人工合成血液穿透的功能,可用于相关防护服的制作。

关键词：生物防护材料穿透性能微生物悬浮液人工合成血液

Solidification microstructure characteristics of Ti–44Al–4Nb–2Cr–0.1B alloy under various cooling rates during mushy zone

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Rare Metals 2016年第1期35卷 35-41页

作者： Peng Han Hong-Chao Kou Jie-Ren yang Guang yang jin-shan Li The State Key Laboratory of Solidification Processing Northwestern Polytechnical University

Beta-solidifying TiAl alloy has great potential in the field of aero-industry as a cast *** the present work,the influence of cooling rate during mushy zone on solidification behavior of Ti-44Al-4Nb-2Cr-0.1B alloy was investigated.A vacuum induction heating device combining with temperature control system was *** Ti-44Al-4Nb-2Cr-0.1B alloy solidified from superheated was melted to β phase with the cooling rates of 10,50,100,200,400 and 700 K·min^（-1）,*** show that with the increase in cooling rate from 10 to 700 K·min^（-1）,the colony size of α_2/γ lamella decreases from 1513 to48 urn and the solidification segregation significantly *** the content of residual B2 phase within α_2/γlamellar colony decreases with the increase in cooling *** addition,the alloy in local interdendritic regions would solidify in a hypo-peritectic way,which can be attributed to the solute redistribution and enrichment of Al element in solidification.

关键词： β-solidifying TiAl alloy Cooling rate Mushyzone Solidification microstructure

Analysis of abnormal texture formation and strengthening mechanism in an extruded Mg-Gd-Y-Zn-Zr alloy

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Journal of Materials Science & Technology 2020年第10期42卷 133-145页

作者： Xueze jin Wenchen Xu Zhongze yang Can Yuan Debin shan BugangTeng Bo Cheng jin National Key Laboratory for Precision Hot Processing of Metals&School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China Advanced Composites Simulation Lab University of Southern CaliforniaLos AngelesCA 90089-0241USA

A Mg-Gd-Y-Zn-Zr magnesium alloy with different initial states was extruded under different extrusion *** effect of solution treatment and extrusion parameters on the microstructure,texture and mechanical properties were analyzed in detail,and the abnormal texture formation and strengthening mechanism was *** extruded at low temperature and small extrusion ratio,the bimodal microstructure consisting of fine dynamically recrystallized grains and coarse deformed grains occurred both in the as-cast alloy and solution-treated *** the extrusion temperature and extrusion ratio were increased,the amount and size of dynamically recrystallized grains increased and the grain size of the solution-treated alloy showed higher growth ***,an abnormal texture withparallel with extrusion direction developed due to the occurrence of non-basal slip and continuous dynamic *** could be enhanced by solution treatment,high temperature,and large extrusion *** the as-cast alloy and solution-treated alloy exhibited the highest tensile strength after extrusion at 300℃with an extrusion ratio of *** refinement was the main strengthening mechanism utilized in both the as-cast alloy and the solution-treated *** hardening played an important role in the sample extruded at low temperature and small extrusion ratio,with the highest contribution of about 33 MPa after extrusion at 300℃with an extrusion ratio of *** strengthening contributed more in the sample extruded at high temperature and large extrusion ratio,but no more than 24.1 *** strengthening was another strengthening mechanism in the extruded as-cast alloy,especially at high temperature and large extrusion ratio(no more than 9 MPa).

关键词： Hot extrusion Heat treatment Abnormal texture Strengthening mechanism Quantitative analysis

A Corrected Solid Boundary Treatment Method for Smoothed Particle Hydrodynamics

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China Ocean Engineering 2017年第2期31卷 238-247页

作者： CHEN Yun-sai ZHENG Xing jin shan-qin DUAN Wen-yang College of Shipbuilding Engineering Harbin Engineering University Harbin 150001 China Department of Technology National Deep Sea Center Qingdao 266061 China

Smoothed Particle Hydrodynamics method （SPFI） has a good adaptability for simulating of free surface flow problems. However, there are some shortcomings of SPH which are still in open discussion. This paper presents a corrected solid boundary handling method for weakly compressible SPH. This improved method is very helpful for numerical stability and pressure distribution. Compared with other solid boundary handling methods, this corrected method is simpler for virtual ghost particle interpolation and the ghost particle evaluation relationship is clearer. Several numerical tests are given, like dam breaking, solitary wave impact and sloshing tank waves. The results show that the corrected solid boundary processing method can recover the spurious oscillations of pressure distribution when simulating the problems with complex geometry boundary.

关键词： SPH particle arrangement boundary treatment solitary wave impact sloshing wave

Combination of eddy current and heat treatment for crack healing and mechanical-property improvement in magnesium alloy tube

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Journal of Magnesium and Alloys 2021年第5期9卷 1788-1801页

作者： Wenchen Xu Chuan yang Haiping Yu Xueze jin Guojing yang Debin shan Bin Guo School of Materials Science and Engineering&National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China Institute of Machinery Manufacturing Technology China Academy of Engineering PhysicsMianyangSichuan621900China

The continuous eddy current pulse treatment(ECPT)combined with heat treatment was employed to heal the microcracks in spin formed Mg alloy tubes and improve their mechanical properties in this *** results show that all the microcracks in different tube specimens were almost healed after different continuous ECPT schemes up to 15 *** schemes with less cooling intervals exhibited better healing effect and increased the strength and elongation of Mg alloy tubes more *** aging treatment,the strength improvement of the specimens with ECPT was more remarkable than that of the specimens without ECPT,and the elongation decrease of the specimens with ECPT was less evident than that of specimens without ECPT due to the segregation of RE elements on the crack ***,after solution treatment,the strength reduction and ductility improvement of the specimens with ECPT were more pronounced than that of the specimens without ECPT owing to the notable decrease of dislocation density of the specimens with *** narrowed cracks induced by ECPT and the segregation of precipitates in the vicinity of microcrack surface during aging treatment contributed to the maximum strength in the as-spun specimens with ECPT followed by aging treatment.

关键词： Microcrack Healing Eddy current pulse treatment Heat treatment

Synthesizing active and durable cubic ceria catalysts(<6 nm)for fast dehydrogenation of bio-polyols to carboxylic acids coproducing green H_(2)

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Green Energy & Environment 2024年第3期9卷 529-543页

作者： Mengyuan Liu Puhua Sun Guangyu Zhang Xin jin Chaohe yang Honghong shan State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of PetroleumNo.66 Changjiang West RoadQingdaoShandong266580China SINOPEC Research Institute of Safety Engineering Co. Ltd.No.339 Songling RoadQingdaoShandong266000China

Dehydrogenation is considered as one of the most important industrial applications for renewable *** ceria-based catalysts are known to display promising dehydrogenation performances in this *** particle size(>20 nm)and less surface defects,however,hinder further application of ceria ***,an alternative strategy involving lactic acid(LA)assisted hydrothermal method was developed to synthesize active,selective and durable cubic ceria of<6 nm for dehydrogenation *** studies of growth mechanism revealed that,the carboxyl and hydroxyl groups in LA molecule synergistically manipulate the morphological evolution of ceria *** groups determine the cubic shape and particle size,while hydroxyl groups promote compositional transformation of ceria precursors into CeO_(2) ***,enhanced oxygen vacancies(Vo)on the surface of CeO_(2) were obtained owing to continuous removal of O species under reductive *** CeO_(2) catalysts synthesized by the LA-assisted method,immobilized with bimetallic PtCo clusters,exhibit a record high activity(TOF:29,241 h^(-1))and Vo-dependent synergism for dehydrogenation of bio-derived polyols at 200℃.We also found that quenching Vo defects at air atmosphere causes activity loss of PtCo/CeO_(2) *** regenerate Vo defects,a simple strategy was developed by irradiating deactivated catalysts using hernia *** outcome of this work will provide new insights into manufacturing durable catalyst materials for aqueous phase dehydrogenation applications.

关键词： Cubic ceria Oxygen vacancy Dehydrogenation C-H bond activation

Superconducting Magnetic Energy Storage Integrated Current-source DC/DC Converter for Voltage Stabilization and Power Regulation in DFIG-based DC Power Systems

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Journal of Modern Power Systems and Clean Energy 2023年第4期11卷 1356-1369页

作者： Ruohuan yang Jianxun jin Qian Zhou Mingshun Zhang shan Jiang Xiaoyuan Chen School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China School of Engineering Sichuan Normal UniversityChengdu 610101China

Unpredictable power fluctuation and fault ridethrough capability attract increased attention as two uncertain major factors in doubly-fed induction generators(DFIGs)integrated DC power *** solutions usually require complicated cooperation comprising multiple modules of energy storage,current control,and voltage *** overcome the drawbacks of existing solutions,this paper proposes a superconducting magnetic energy storage(SMES)integrated currentsource DC/DC converter(CSDC).It is mainly composed of a current-source back-to-back converter,and the SMES is tactfully embedded in series with the intermediate DC *** proposed SMES-CSDC is installed in front of the DC-DFIG to carry out its dual abilities of load voltage stabilization under multifarious transient disturbances and power regulation under wind speed *** with the existing DC protection devices,the SMES-CSDC is designed on the basis of unique current-type energy *** has the advantages of fast response,extensive compensation range,concise hardware structure,and straightforward control *** feasibility of the SMESCSDC is implemented via a scaled-down experiment,and its effectiveness for DC-DFIG protection is verified by a large-scale DC power system simulation.

关键词： Superconducting magnetic energy storage(SMES) DC doubly-fed induction generator(DC-DFIG) current-source converter voltage stabilization power regulation