泰安方特欢乐世界主题乐园营销策略分析

主题乐园是旅游产业中一种集休闲娱乐、科学教育、文化熏陶于一体的现代化旅游产品,相较于其他类型的旅游产品,主题乐园近几年发展迅速。泰安方特主题乐园作为山东地区较大的主题乐园,覆盖了泰安及周边市区的相关市场。泰安方特主题乐园在运营中积累了很多经验,但随着市场竞争的日益激烈,在发展过程中也面临着一些新的变化和挑战。为了应对市场竞争,掌握市场主动权,必须要优化营销策略以增强营销效果。本文以泰安方特欢乐世界主题乐园为例,通过文献分析法、对比分析法以及4P营销理论分析法对泰安方特欢乐世界主题乐园的营销环境和营销现状进行深入分析,发现其问题,并提出相应的解决策略。

区域数字资源赋能教育新基建

教育新基建是当前我国教育数字化转型的有力支撑。针对教育信息化1.0时代区域数字资源建设中存在的建设内容、平台功能、资源渠道单一,以及登录账号不统一的问题,为改善区域数字资源建设,促进数字资源赋能教育新基建,提出以多元化推进数字资源健康发展的新思路,即注重共享性、优质性、定制性、交互性、智能性等五个特性;并在此基础上,通过分析需求、精准定位、合理规划、分步进行的方法精准避免数字资源重复建设。最后,通过建设数字资源底层框架、建设数字资源实体内容、优化数字资源保障机制三条路径,促进多方联动融合,共同打造内容丰富、形式多样、功能优化、跟踪评价、反馈导学、便于使用的融合型数字资源平台,赋能区域教育健康绿色快速发展。

Modeling and Control Strategy of Built-in Skin Effect Electric Tracing System

In order to ensure the safety of fluid flow in deep-water submarine pipelines,a safe and energy-saving built-in skin effect electric heat tracing technology was adopted as the thermal management strategy.The magnetic field distribution of built-in skin effect heating system is analyzed based on the mechanism of built-in skin effect heating system,so as to obtain the equivalent circuit model of built-in skin effect electric heating system.Meanwhile,heating power is introduced as an intermediate variable to establish the relationship between power supply frequency and built-in skin effect heating temperature.Aiming at the skin effect electric heating system,an Active Disturbance Rejection Control(ADRC)method is proposed macroscopically based on Hammerstein model.Firstly,the parameters of Hammerstein model are identified and optimized using the auxiliary model and standard particle swarm optimization algorithm.Then,the ADRC controller of linear link is designed,and the required heating temperature is used to solve the intermediate variable heating power.Finally,inversion calculation is applied in the nonlinear link to solve the required power frequency,so as to achieve the purpose of efficient heating and verify the feasibility and effectiveness of control strategy through simulation.

Earthquake fault framework and seismotectonics of the Songpan-Garze region since 1900

Based on 4 781 observed faults （〉2 km length） from a 1：200 000 scale digital geologic map and 5 220 recorded seismic events since the year 1900, 993 earthquake faults are identified within the triangular Songpan-Garze study region. The study area is delineated by the nearly EW-trending East Kunlun fault zone to the north, the NW-trending Xianshuihe fault to the south and the NE-trending Longmenshan thrust belt to the east. Seismicity changes along these earthquake faults, spanning four 10-year intervals since 1970, show that following a strong earthquake swarm, which occurred in the Huya area in the mid-1970s, seismic activity increased from north to south, and migrated eastward along each major strike-slip fault zone. GPS observation data before 2008 indicate a displacement rate across the Xianshuihe fault zone to the south of -6.5- 8.6 mm/a, whereas across the East Kunlun fault zone to the north it was -1.8- 2.2 mm/a. The May 12, 2008 Ms8.0 Wenchuan earthquake, which occurred in the southeast corner of the study region, was the result of stable, high-speed left-lateral displacement along the Xianshuihe fault zone, and a sharp eastward bend of the fault trend in response to the presence of crystalline rocks in the Kangding area. Therefore, the 110-year established seismotectonic framework of the Songpan-Garze region can be defined by a network of various earthquake faults and the structural relations of the local earthquake activities.

Tunable optical topological transitions of plasmon polaritons in WTe_(2) van der Waals films

Naturally existing in-plane hyperbolic polaritons and the associated optical topological transitions,which avoid the nano-structuring to achieve hyperbolicity,can outperform their counterparts in artificial metasurfaces.Such plasmon polaritons are rare,but experimentally revealed recently in WTe_(2)van der Waals thin films.Different from phonon polaritons,hyperbolic plasmon polaritons originate from the interplay of free carrier Drude response and interband transitions,which promise good intrinsic tunability.However,tunable in-plane hyperbolic plasmon polariton and its optical topological transition of the isofrequency contours to the elliptic topology in a natural material have not been realized.Here we demonstrate the tuning of the optical topological transition through Mo doping and temperature.The optical topological transition energy is tuned over a wide range,with frequencies ranging from 429 cm^(−1)(23.3 microns)for pure WTe_(2)to 270 cm^(−1)(37.0 microns)at the 50%Mo-doping level at 10 K.Moreover,the temperature-induced blueshift of the optical topological transition energy is also revealed,enabling active and reversible tuning.Surprisingly,the localized surface plasmon resonance in skew ribbons shows unusual polarization dependence,accurately manifesting its topology,which renders a reliable means to track the topology with far-field techniques.Our results open an avenue for reconfigurable photonic devices capable of plasmon polariton steering,such as canaling,focusing,and routing,and pave the way for low-symmetry plasmonic nanophotonics based on anisotropic natural materials.

民族主义时期澳大利亚文学中的边缘人——亨利·劳森作品中的华人形象研究

在澳大利亚作家创造民族文学和书写澳大利亚性过程中,澳大利亚华人自始至终是边缘化的存在。劳森作品中的华人作为寄居者,面临种族歧视和远离故土的双重困境;他们精于业务、吃苦耐劳,却多以贩毒商人、瘾君子和赌徒的负面形象呈现,成为淘金时期存在共性问题的底层阶级的'替罪羊',成为澳大利亚社会臆想中东方入侵的'替罪羊';他们被描绘成卑屈的底层阶级、'逆来顺受'的'白色中国人',成为民族主义时期白人'自我'追求身份认同的镜像'他者',促使以劳森为代表的民族主义作家在'文化自卑'下不断界定、建构和确认西方文化和种族优越感。

组织工程中细胞与生物材料相互作用研究进展

种子细胞、生物材料和生长因子是组织工程三要素。生物材料模拟体内细胞外基质,为细胞提供良好的生长附着环境,维持细胞的活力和功能。材料表面的理化性质和表面改性分子直接影响细胞的粘附、增殖、迁移和分化等细胞行为,进而影响细胞功能和组织再生效果。材料表面修饰分子是细胞表面粘附和生长的直接接触位置,因此细胞与生物材料表面修饰分子的相互作用是组织工程的关键。文中重点介绍表面修饰分子对细胞表型及功能的影响,为组织工程关键问题的研究提供参考。

DEM investigation of macro-and micro-mechanical properties of rigid-grain and soft-chip mixtures

We investigated the macro-and micro-mechanical properties of rigid-grain and soft-chip mixtures(GCMs)through numerical simulations using the discrete element method.We present a novel framework for the discrete modeling of soft chips and rigid grains in conjunction with calibration processes.Several numerical triaxial tests were also performed on GCMs with 0%,10%,20%,and 30%volumetric chip contents,P.The simulation results demonstrate that increasing P leads to higher GCM toughness,higher deviatoric peak stress,and higher corresponding shear strain.Higher P also contributes to more volume contraction and less dilation.The friction angles at both the peak and residual state significantly increase with increasing P.In view of the micro-mechanical features,strong contact force chains develop along the loading direction,which results in considerable anisotropy in the peak and residual states.Both the formation of strong force chains and rotation of grains decrease with increasing P,whereas the grain sliding percentage increases.The tensile force is mobilized with shearing and higher P leads to less mobilization of the tensile force.These findings are useful for better understanding the internal structure of GCMs with different soft-chip contents,especially in granular mixture mechanics and geomechanics.

Development of cost-effective nanocrystalline multi-component(Ce,La,Y)-Fe-B permanent magnetic alloys containing no critical rare earth elements of Dy,Tb,Pr and Nd

Here we first report the fully abundant rare earth(RE)-based nanocrystalline multi-component(Ce,La,Y)-Fe-B alloys containing no critical RE elements of Nd,Pr,Dy,and Tb by melt-spinning technique.The roles of La and Y substitutions for Ce have been fully understood.La plays a positive role on both thermal stability and room-temperature(RT)magnetic properties.The enhanced coercivity H_(cj)by partial substitution of La is attributed to the increases of anisotropy field H_A and the formation of continuously distributed grain boundaries resulting from the suppre s sion of CeFe_(2)phase.Although Y substitution is not benefit for H_(cj),both remanent polarization J_r and thermal stability have been effectively improved since Y_(2)Fe_(14)B shows relatively high saturation magnetization M_s and a positive temperature coefficient of HA over a certain temperature range.In addition,RE element segregation has been confirmed,La prefers to enter into the grain boundaries than Ce and Y prefers to remain in the 2:14:1 phase.Based on these understanding,a series of melt-spun(Ce,La,Y)-Fe-B alloys have been designed.A relatively good combination of magnetic properties with maximum energy product(BH)_(max)=7.4 MGOe,H_(Cj)=400 kA/m,and J_r=0.63 T has been obtained in[(Ce_(0.8)La_(0.2))_(0.7)Y_(0.3)]_(17)Fe_(78)B_6 alloy,together with high Curie temperature(T_c=488 K)and low temperature coefficients of remanence(α=-0.255%/K)and coercivity(β=-0.246%/K).