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Taxonomic review of the genus Coelopisthia F?rster (Hymenoptera:Pteromalidae) from China, with four new species

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Zoological Systematics 2014年第4期39卷 545-554页

作者： tian-Yang Jiao Hui Xiao Key Laboratory of Zoological Systematics and Evolution Institute of Zoology Chinese Academy of Sciences College of Life Sciences University of Chinese Academy of Sciences

The pteromalid genus Coelopisthia from China is studied with eight species including four new species and two newly recorded species： C. dasycladus sp. nov., C. gracilentus sp. nov., C. pseudaletia sp. nov., C. condensus sp. nov., C. areolata Askew and C. caledonica Askew. A key to Chinese species is provided. All the specimens are deposited in the Zoological Museum, Institute of Zoology, Chinese Academy of Sciences.

关键词： Hymenoptera Pteromalidae Coelopisthia new species China

基于9种风味物质的利川红SPME优化及PLS-DA风味识别

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食品科学 2021年第6期42卷 215-222页

作者：程超夏兰欣杜芬妮李伟田成湖北民族大学生物科学与技术学院湖北恩施445000 生物资源保护与利用湖北省重点实验室湖北恩施445000

以红茶9种风味物质为评价指标,采用响应面法优化利川红茶风味物质固相微萃取条件,同时将利川红与宜红、滇红的风味成分进行比较。结果发现利川红最优固相微萃取条件为料液比1∶4.11(g/mL),萃取温度71.75℃,萃取时间50.15 min。在此条件... 详细信息

以红茶9种风味物质为评价指标,采用响应面法优化利川红茶风味物质固相微萃取条件,同时将利川红与宜红、滇红的风味成分进行比较。结果发现利川红最优固相微萃取条件为料液比1∶4.11(g/mL),萃取温度71.75℃,萃取时间50.15 min。在此条件下利川红鉴定出73种风味物质,以呋喃类、醛类、烷烃和酯类物质为主,相对含量分别为21.202%、20.11%、13.751%和11.662%。宜红鉴定出59种风味物质,呋喃、醇类、醛类和烷烃相对含量分别为23.445%、21.04%、19.816%和18.070%。滇红鉴定出66种风味物质,醇类、醛类、呋喃类相对含量分别为35.587%、15.103%和12.229%。分别对3种红茶中所有风味物质和9种重要风味物质进行偏最小二乘-判别分析,以红茶中9种风味物质为评价指标,不仅可以进行红茶风味类型预测,而且优于基于全部风味物质的预测能力。变量投影重要度分析发现,芳樟醇、顺式芳樟醇氧化物、香叶醇、2-己烯醛对3种红茶风味影响最大,这几种风味成分可作为3种红茶相互区分的主要特征标志物。本研究结果可为继续开展利川红茶香气品质调控提供理论基础。

关键词：偏最小二乘-判别分析固相微萃取气相色谱-质谱联用利川红宜红滇红

Observation of specific ion effects in humus aggregation process

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Pedosphere 2021年第5期31卷 736-745页

作者： Rui tian Xinmin LIU Xiaodan GAO Rui LI Hang LI Chongqing Key Laboratory of Soil Multi-scale Interfacial Process College of Resources and EnvironmentSouthwest UniversityChongqing 400715(China)

Specific ion effects play a vital role in a variety of colloidal and interfacial ***,few studies have reported the specific ion effects in the humus aggregation process,which strongly influence the transport and fate of environmental *** this study,soil humus colloids were prepared and characterized,and the specific ion effects on humus aggregation in electrolyte solutions were investigated at a variety of concentrations and pH values using dynamic light scattering *** energy(ΔE),which is known to reflect the dynamics and stability of a colloidal system,was used to quantitatively characterize the specific ion *** results showed that given ΔE value of 2.48×10^(3) J mol^(-1) at pH 3.0,the electrolyte concentrations were 91.6,58.2,3.8,and 0.8 mmol L^(-1) for Na^(+),K^(+),Mg^(2+),and Ca_(2+),respectively,thus indicating significant specific ion effects in the humus aggregation *** importantly,decreasing the electrolyte concentrations increased the differences in the ΔE value between two cation species with the same valence(i.e.,ΔE_(Na)-ΔE_(K) and ΔE_(Mg)-ΔE_(Ca)),while increasing the pH increased the magnitude of ΔE_(Mg)-ΔE_(Ca).However,the classic Derjaguin,Landau,Verwey,and Overbeek(DLVO)theory and the double layer theory,as well as the currently widely used ionic hydration and dispersion effects,failed to predict the experimentally observed increase in the specific ion effects with decreasing electrolyte concentrations in a quantitative *** results have implications for the necessity of involving specific ion effects for a better understanding of humus aggregation and interactions in aqueous and soil systems.

关键词： Derjaguin Landau Verwey and Overbeek theory double layer theory ionic dispersion ionic hydration supramolecular aggregates

Positioning error compensation of an industrial robot using neural networks and experimental study

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Chinese Journal of Aeronautics 2022年第2期35卷 346-360页

作者： Bo LI Wei tian Chufan ZHANG Fangfang HUA Guangyu CUI Yufei LI College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Hebei Hanguang Industry Co. LtdHandan 056017China

Due to the characteristics of high efficiency,wide working range,and high flexibility,industrial robots are being increasingly used in the industries of automotive,machining,electrical and electronic,rubber and plastics,aerospace,food,*** the low positioning accuracy,resulted from the serial configuration of industrial robots,has limited their further developments and applications in the field of high requirements for machining accuracy,e.g.,aircraft *** this paper,a neural-network-based approach is proposed to improve the robots’positioning ***,the neural network,optimized by a genetic particle swarm algorithm,is constructed to model and predict the positioning errors of an industrial ***,the predicted errors are utilized to realize the compensation of the target points at the robot’s ***,a series of experiments of the KUKA KR 500–3 industrial robot with no-load and drilling scenarios are implemented to validate the proposed *** experimental results show that the positioning errors of the robot are reduced from 1.529 mm to 0.344 mm and from 1.879 mm to 0.227 mm for the no-load and drilling conditions,respectively,which means that the position accuracy of the robot is increased by 77.6%and 87.9%for the two experimental conditions,respectively.

关键词： Aircraft assembly Error compensation Industrial robot Neural network Robotic drilling

Facile synthesis of spinel LiNi_(0.5)Mn_(1.5)O_(4) as 5.0 V-class high-voltage cathode materials for Li-ion batteries

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Chinese Journal of Chemical Engineering 2021年第11期34卷 247-254页

作者： Xueyi Guo Chenlin Yang Jinxiu Chen Qinghua tian Hongmei Zhang Guoyong Huang School of Metallurgy and Environment Central South UniversityChangsha 410083China College of New Energy and Materials China University of Petroleum-BeijingBeijing 102249China State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of Petroleum-BeijingBeijing 102249China State Key Laboratory of Advanced Chemical Poer Sources Guizhou Meiling Power Sources Co.Ltd.Zunyi 563003China

LiNi_(0.5)Mn_(1.5)O_(4) and LiMn_(2)O_(4) with novel spinel morphology were synthesized by a hydrothermal and postcalcination *** synthesized LiMn_(2)O_(4) particles(5–10 lm)are uniform hexahedron,while the LiNi_(0.5)Mn_(1.5)O_(4) has spindle-like morphology with the long axis 10–15 lm,short axis 5–8 *** LiMn_(2)O_(4) and LiNi_(0.5)Mn_(1.5)O_(4) show high capacity when used as cathode materials for Li-ion *** the voltage range of 2.5–5.5 V at room temperature,the LiNi_(0.5)Mn_(1.5)O_(4) has a high discharge capacity of 135.04 mA·h·g^(-1) at 20 mAg^(-1),which is close to 147 mA·h·g^(-1)(theoretical capacity of LiNi_(0.5)Mn_(1.5)O_(4)).The discharge capacity of LiMn_(2)O_(4) is 131.08 mA·h·g^(-1) at 20 mAg^(-1).Moreover,the LiNi_(0.5)Mn_(1.5)O_(4) shows a higher capacity retention(76%)compared to that of LiMn_(2)O_(4)(61%)after 50 *** morphology and structure of LiMn_(2)O_(4) and LiNi_(0.5)Mn_(1.5)O_(4) are well kept even after cycling as demonstrated by SEM and XRD on cycled LiMn_(2)O_(4) and LiNi_(0.5)Mn_(1.5)O_(4) electrodes.

关键词： LiMn_(2)O_(4) LiNi_(0.5)Mn_(1.5)O_(4) Novel morphology Li-ion battery Electrochemistry Preparation Nanomaterials

Review on occupancy detection and prediction in building simulation

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Building Simulation 2022年第3期15卷 333-356页

作者： Yan Ding Shuxue Han Zhe tian Jian Yao Wanyue Chen Qiang Zhang School of Environmental Science and Engineering Tianjin Key Laboratory of Built Environment and Energy ApplicationTianjin UniversityTianjin300072 Department of Architecture Ningbo UniversityNingboChina

Energy simulation results for buildings have significantly deviated from actual consumption because of the uncertainty and randomness of occupant *** differences are mainly caused by the inaccurate estimation of occupancy in ***,the error between reality and prediction could be largely reduced by improving the accuracy level of occupancy *** various studies on occupancy have been conducted,there are still many differences in the approaches to detection,prediction,and *** published within this domain are reviewed in this article to discover the advantages and limitations of previous studies,and gaps in the research are identified for future *** methods of monitoring and their combinations are analyzed to provide effective guidance in choosing and applying a *** advantages of deterministic schedules,stochastic schedules,and machine-learning methods for occupancy prediction are summarized and discussed to improve prediction accuracy in future ***,three applications of occupancy models—improving building simulation software,facilitating building operation control,and managing building energy use—are *** review provides theoretical guidance for building design and makes contributions to building energy conservation and thermal comfort through the implementation of intelligent control strategies based on occupancy monitoring and prediction.

关键词： occupancy rate monitoring occupancy model occupancy prediction occupancy verification

Effective and selective separation of perrhenate from acidic wastewater by super-stable,superhydrophobic,and recyclable biosorbent

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Frontiers of Environmental Science & Engineering 2022年第2期16卷 75-86页

作者： Hui Hu Lei Jiang Longli Sun Yanling Gao tian Wang chenguang Lv School of Chemical Engineering Fuzhou UniversityFuzhou 350116China Army Infantry College Nanchang 330103China

The recovery of scattered metal ions such as perrhenate(Re(VII))from industrial effluents has enormous economic benefits and promotes resource ***-metal/biochar hybrid biosorbents are attractive for recovery but are limited by their insufficient stability and low selectivity in harsh ***,a superstable biochar-based biosorbent composed of ZnO nanoparticles with remarkable superhydrophobic features is fabricated,and its adsorption/desorption capabilities toward Re(VII)in strongly acidic aqueous solutions are *** ZnO nanoparticle/biochar hybrid composite(ZBC)exhibits strong acid resistance and high chemical stability,which are attributable to strong C-O-Zn interactions between the biochar and ZnO *** to the advantages of its hydrolytic stability,superhydrophobicity,and abundance of Zn-O sites,the ZBC proves suitable for the effective and selective separation of Re(VII)from single,binary and multiple ion systems(pH=1),with a maximum sorption capacity of 29.41 mg/*** importantly,this material also shows good recyclability and reusability,with high adsorption efficiency after six adsorption-desorption *** findings in this work demonstrate that a metal/biochar hybrid composite is a promising sorbent for Re(VII)separation.

关键词： Selectivity Adsorption Re(VII) ZnO Biochar

On demand bidirectional shape transformations and novel chiral actuators of photomediated shape memory polymer film based on photothermal OEGy-W_(18)O_(49)nanowires

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Science China(Technological Sciences) 2023年第12期66卷 3585-3595页

作者： tian GuangMing WANG Bo HE XinHai WANG Chen YANG Dong MA JianHua Department of Polymer Materials and Engineering School of Materials EngineeringXi’an Polytechnic UniversityXi’an 710048China Xi’an Aerospace Chemical Propulsion Factory Co.Ltd. Xi’an 710025China

The spatially controllable shape-shifting behaviors of a planar two-dimensional(2D)film to three-dimensional(3D)shapes upon external stimuli are of paramount significance for the development of smart ***,the present work focuses on fabricating plain film whose shape can be remotely and spatially transformed into various 3D configurations via the formation of a laser-induced temperature gradient;when subjected to laser irradiation,the prestretched hybrid films exhibit out-of-plane bending behavior owing to anisotropic chain relaxation and strain energy *** this basis,various sophisticated shape transformations can be achieved by site-specific irradiations of laser with a controllable ***,shape morphing involving reversible bending transformations can also be realized by employing the laser on the corresponding opposite side of the hybrid ***,under a 160 mW/cm^(2) simulated sunlight illumination,the transformation of flat 2D film into 3D chiral actuators is driven by material anisotropy and geometrical heterogeneity of a bilayer strip design,and it yields right and left-handed helix,the morphologies of the helix shape can be precisely tailored by the strip angles and strain values.

关键词： shape-shifting temperature gradient out-of-plane bending chiral actuators anisotropy

Development of a new high-shear and low-pressure grinding wheel and its grinding characteristics for Inconel718 alloy

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Chinese Journal of Aeronautics 2022年第12期35卷 278-286页

作者： Bing LIU Yebing tian Jinguo HAN Linguang LI Zhiqiang GU Xintao HU School of Mechanical Engineering Shandong University of TechnologyZibo 255049China Institute for Advanced Manufacturing Shandong University of TechnologyZibo 255049China

Nickel-based alloy has been widely used due to its outstanding mechanical ***, Nickel-based alloy is a typical difficult-to-machine material, which is a great constrain for its application in the manufacturing field. To improve the surface quality of the ground workpiece, a new high-shear and low-pressure grinding wheel, with high ratio of tangential grinding force to normal grinding force, was fabricated for the grinding of selective laser melting(SLM) manufactured Inconel718 alloy. The principle of high-shear and low-pressure grinding process was introduced in detail, which was quite different from the conventional grinding process. The fabrication process of the new grinding wheel was illustrated. A serial of experiments with different processing parameters were carried out to investigate the grinding performance of the developed grinding wheel via analyzing surface roughness and surface morphology of the ground *** optimal processing parameters of high-shear and low-pressure grinding were obtained. The surface roughness of ground workpiece was reduced to 0.232 μm from the initial value of 0.490 μm under the optimal grinding conditions. It was found that the initial scratches on the ground workpiece were almost completely removed after the observations with the metalloscopy and the fieldemission scanning electron microscopy(FE-SEM). The capability of the newly developed highshear and low-pressure grinding wheel was validated.

关键词： Grinding Grinding wheel High-shear and low-pressure grinding Inconel718 alloy Selective laser melting(SLM)