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NEW PRODUCT DESIGN STRATEGIES WITH SUBSIDY POLICIES

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Journal of Systems Science and Systems Engineering 2012年第3期21卷 356-371页

作者： xuemei zhang Xiaoyan XU Ping HE School of Management University of Science & Technology of China Hefei 230026 China School of Economics and Management Fuyang Teachers College Fuyang 236037 China

Industrial development can enrich people＇s lives, but it also causes environmental pollution, which is an area of significant concern among governments, consumers, and companies. Governments formulate some environmental policies, which motivate industry by providing greater incentives for green product development. Consumers are classified into two groups - ordinary and green market segments - according to their environmental awareness and attitudes. In this regard, companies need to reconsider their primary product design strategies. By investigating the interactions among customers＇ preferences, firms＇ product strategies, and government subsidy policies, this paper presents a theoretical model for new product design strategies. After detailed theoretical analysis of such strategies, we found that to motivate firms to choose environmentally friendly product design strategies, governments should inaugurate effective subsidy policies. After simultaneously considering environmental issues and firms＇ benefits, we designed a subsidy policy. With such a policy, firms can change their primary product design strategies and develop both green and ordinary products, thereby increasing the firms＇ profits and improving the total environmental quality.

关键词： Product design strategy subsidy policy green product total environmental quality

Stability of the Fe12O12 cluster

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Nano Research 2018年第7期11卷 3574-3581页

作者： Xiaohu Yu xuemei zhang Xun-Wang Yan Institute of Theoretical and Computational Chemistry Shaanxi Key Laboratory of Catalysis School of Chemical & Environment Sciences Shaanxi University of Technology Hanzhong 723000 China Department of Physics and Energetics Moscow Institute of Physics and Technology Dolgoprudny 141700 Russia College of Physics and ElectricalEngineering Anyang Normal University Anyang 455000 China

Superexchange effects play an important role in the determination of crystal structures; however, there has been much less reported on how they determine the stability of dusters. Using evolutionary search strategies and DFT＋U （density functional theory with the Hubbard U correction） calculations, we investigate the global minimum-energy structures of Fe12O12 clusters. Among predicted Fe12O12 dusters, a cage-shaped Fe12O12 cluster with unexpected stability was observed. In addition, the bare Fe12O12 cluster is shown to possess an extremely large energy gap （2.00 eV）, which is greater than that of C60, Au20 and Al13- clusters. Using a Heisenberg model, we traced the origin of the unexpected stability of the bare Fe12O12 cluster to magnetic competition between the nearestneighbor exchange constant h and the next-nearest neighbor exchange constant J2 that was induced by the superexchange interactions. The bare Fe12O12 cluster is thus a unique molecule that is stable and chemically inert.

关键词： Fe12O12 evolutionary program superexchange effect DFT+U Heisenberg model

Host-guest supramolecular chemistry at solid-liquid interface:An important strategy for preparing two-dimensional functional nanostructures

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Science China Chemistry 2014年第1期57卷 13-25页

作者： zhang xuemei ZENG QingDao WANG Chen National Center for Nanoscience and Technology (NCNST)

Supramolecular self-assembly,an important strategy in nanotechnology,has been widely studied in the past two *** this review,we have introduced the recent progress on construction of two-dimensional(2D)nanostructures by host-guest supramolecular chemistry at solid-liquid interface,and the interactions between the host assembly and the guest molecules are the major *** first,the hydrogen bonds connected hybrid structures are *** then we have paid a close attention on the surface-confined condensation reactions that has flourished recently in direct preparing novel nanostructures with increasing structural *** the end,the cavity confinement of the 2D supramolecular host-guest architectures has been *** the basis of the above-mentioned interactions,a group of functional hybrid structures have been ***,scanning tunneling microscopy(STM),a unique technique to probe the surface morphology and information at the single molecule level,has been used to probe the formed structures on highly oriented pyrolytic graphite(HOPG)surface.

关键词： self-assembly,STM,hydrogen bond,host-guest chemistry,supramocular coordination,Schiff-base reaction

Magnetically Driven Superhydrophobic Polyurethane Sponge for High Efficiency Oil/Water Mixtures Separation

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Journal of Bionic Engineering 2019年第1期16卷 38-46页

作者： xuemei zhang Feng Fu Xiaoming Gao Xiufang Hou Shaanxi Key Laboratory of Chemical Reaction Engineering Department of Chemistry and Chemical EngineeringYan'an UniversityYan'an 716000China

Magnetically driven super-hydrophobic materials were prepared by Fe3O4 nanoparticles and stearic acid,which were deposited on the surface of polyurethane *** presence of the Fe3O4 nanoparticles makes the sponge have the magnetic,and the micro-nano hierarchical structure and hydrophobic functional groups lead to the sponge have excellent *** as-prepared sponge exhibited excellent absorption capacities for various oils and organic solvents ranging from 23.8 times to 86.7 times of its own ***,the oil separation capacities still keep a high value after 50 cycles of squeezing the saturated absorbed as-prepared *** of these satisfactory properties make the as-prepared sponge as a candidate of ideal absorbents for oily industrial wastewater and oil spills in oceans.

关键词： superhydrophobic/superoleophilic materials polyurethane sponge magnetic driven oil-water separation continuous separation

Rapid report of source parameters of 2023 M6.2 Jishishan,Gansu earthquake sequence

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Earth and Planetary Physics 2024年第2期8卷 436-443页

作者： ZhiGao Yang Jie Liu YingYing zhang Wen Yang xuemei zhang China Earthquake Networks Center Beijing 100045China

The M6.2 earthquake in Jishishan,Gansu Province,on December 18,2023,caused extraordinary earthquake *** was located in the northern part of the north−south seismic zone,which is a key area for earthquake monitoring in *** newly built dense strong motion stations in this area provide unprecedented conditions for high-precision earthquake relocation,especially the earthquake focal *** paper uses the newly built strong motion and traditional broadband seismic networks to relocate the source locations of the M3.0 and above aftershocks and to invert their focal *** horizontal error of earthquake location is estimated to be 0.5−1 km,and the vertical error is 1−2 *** focal depth range of aftershocks is 9.6−14.6 km,distributed in a 12-km-long strip with SSE *** in the south are more concentrated horizontally and vertically,while aftershocks in the north are more *** focal mechanisms of the main shock and aftershocks are relatively consistent,and the P-axis orientation is consistent with the regional strain *** is a seismic blank area of M3.0 and above,about 3−5 km between the main shock and *** is suggested that the energy released by the main shock rupture is concentrated in this *** on the earthquake location and focal mechanism of the main shock,it is inferred that the Northern Lajishan fault zone is the seismogenic structure of the main shock,and the main shock did not occur on the main fault,but on a secondary *** initial rupture depth and centroid depth of the main shock were 12.8 and 14.0 km,*** source rupture depth may not be the main reason for the severe earthquake disaster.

关键词： Jishishan earthquake earthquake relocation focal mechanism strong motion data

Consumer willingness to pay for eco-labels in China:A choice experiment approach

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Journal of Management Analytics 2021年第4期8卷 673-692页

作者： xuemei zhang Haitao Yin Rui Zhao Antai College of Economics and Management Shanghai Jiao Tong UniversityShanghaiPeople’s Republic of China

The use of eco-labels has become increasingly popular in *** study aims to understand whether Chinese consumers are willing to pay for eco-labels and how their willingness to pay(WTP)is *** we find that Chinese consumers are willing to pay more for products that are labeled as having greater energy efficiency(Energy Efficiency Label)or as having been produced using more environmentally-friendly production processes(Environmental Label),some practices have significantly impaired the effectiveness of these labels,*** burgeoning use of eco-labels has led to label confusion;public trust towards *** policy implications are discussed in this study.

关键词： WTP environmental labels energy efficiency labels label confusion

Study on crustal, lithospheric and asthenospheric thickness beneath the Qinghai-Tibet Plateau and its adjacent areas

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Chinese Science Bulletin 2007年第6期52卷 797-804页

作者： zhang xuemei SUN RuoMei TENG JiWen Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China College of Geo-exploration Science and Technology Jilin University Changchun 130026 China

Based on the results of pure dispersions of Rayleigh wave tomography in the Qinghai-Tibet Plateau and its adjacent areas, taking S wave velocities from previous linear inversion as the initial model, us-ing the simulated annealing algorithm, a nonlinear simultaneous inversion has been carried out for S wave velocity and thickness of different layers, including the crust, the lithosphere and the astheno-sphere. The results indicate: The crustal thickness shows strong correlation with geology structures sketched by the sutures and major faults. The crust is very thick in the Qinghai-Tibet Plateau, varying from 60 km to 80 km. The lithospheric thickness in the Qinghai-Tibet Plateau is thinner (130―160 km) than its adjacent areas. And two blocks can be recognized, divided by an NNE strike boundary running between 90°E―92°E inside the plateau. Its asthenosphere is relatively thick, varies from 150 km to 230 km, and the thickest area is located in the western Qiangtang. India has a thinner crust (32―38 km), a thicker lithosphere of 190 km and a rather thin asthenosphere of only 60 km. Sichuan and Tarim basins have the crust thickness less than 50 km. Their lithospheres are thicker than the Qinghai-Tibet Plateau, and their asthenospheres are thinner. A discussion has been made on the character and formation mechanism of the typical crust-mantle transition zone in the western Qiangtang block.

关键词：青藏高原邻近地区地壳厚度岩石圈厚度岩流圈厚度

Low-cost, green synthesis of highly porous carbons derived from lotus root shell as superior performance electrode materials in supercapacitor

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Journal of Energy Chemistry 2016年第1期25卷 26-34页

作者： Xin Wang Mengjiao Wang xuemei zhang Hejun Li Xiaohui Guo Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education and the College of Chemistry and Materials ScienceNorthwest UniversityXi'an 710069ShaanxiChina School of Materials Science and Engineering the State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi'an 710069ShaanxiChina

Facile production of high quality activated carbons from biomass materials has greatly triggered much attention presently. In this paper, a series of interconnected porous carbon materials from lotus root shells biomass are prepared via simple pyrolysis and followed by a KOH activation process. The prepared carbons exhibit high specific surface areas of up to 2961 m^2/g and large pore volume～1.47 cm3/g. In addition, the resultant porous carbons served as electrode materials in supercapacitor exhibit high specific capacitance and outstanding recycling stability and high energy density. In particular, their specific capacitance retention was almost 100% after 10500 cycles at a current density of 2 A/g. Remarkabely, the impact of the tailored specific surface areas of various carbon samples on their capacitive performances is systematically ***, it was believed that the highly-developed porosity features（including surface areas and pore volume and pore size-distributions）, together with the good conductivity of activated carbon species, play a key role in effectively improving the storage energy performances of the porous carbon electrode materials in supercapacitor.

关键词： Carbon Porous Biomass Surface area Capacity

Construction of Electrocatalytic and Heat-Resistant Self-Supporting Electrodes for High-Performance Lithium–Sulfur Batteries

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Nano-Micro Letters 2019年第4期11卷 386-402页

作者： xuemei zhang Yunhong Wei Boya Wang Mei Wang Yun zhang Qian Wang Hao Wu College of Materials Science and Engineering Sichuan UniversityChengdu 610064People’s Republic of China Department of Advanced Energy Materials Sichuan UniversityChengdu 610064People’s Republic of China

Boosting the utilization efficiency of sulfur electrodes and suppressing the“shuttle effect”of intermediate polysulfides remain the critical challenge for high-performance lithium-sulfur batteries(LSBs).However,most of reported sulfur electrodes are not competent to realize the fast conversion of polysulfides into insoluble lithium sulfides when applied with high sulfur loading,as well as to mitigate the more serious shuttle effect of polysulfides,especially when worked at an elevated ***,we reported a unique structural engineering strategy of crafting a unique hierarchical multifunctional electrode architecture constructed by rooting MOF-derived CoS2/carbon nanoleaf arrays(CoS2-CNA)into a nitrogen-rich 3D conductive scaffold(CTNF@CoS2-CNA)for *** accelerated electrocatalytic effect and improved polysulfide redox kinetics arising from CoS2-CNA were ***,the strong capillarity effect and chemisorption of CTNF@CoS2-CNA to polysulfides enable high loading and efficient utilization of sulfur,thus leading to high-performance LIBs performed not only at room temperature but also up to an elevated temperature(55°C).Even with the ultrahigh sulfur loading of 7.19 mg cm?2,the CTNF@CoS2-CNA/S cathode still exhibits high rate capacity at 55°C.

关键词： Metal organic framework Lithium-sulfur batteries Cobalt sulfide Heat-resistant N-doped carbon foam