资源型城市转型力评价指标体系构建与测度:以山西省资源型城市为例

资源型城市面临资源枯竭等问题,寻求转型成为资源型城市发展的突破口。为了充分把握资源型城市转型力的发展状况,研究资源型城市转型的能力,评判资源型城市转型的发展态势,通过转型环境、转型投入、转型绩效三个方面构建综合指标体系,反映资源型城市转型力的综合水平,以山西省资源型城市为例,通过实证分析对指标体系予以验证。结果表明:2006年以来,山西省资源型城市转型力波动显著,近一半的城市转型力表现为下降趋势;在空间分布中,山西省资源型城市转型力表现为东强西弱的特征,其中大同市最强;整体分析上,山西省内部资源型城市转型力差异变动不大,差距依然明显;城市转型系统耦合协调度水平较低,60%的集中在勉强协调程度。随着资源型城市的发展,转型所包含的因素也会随之变化,用于测度城市转型力的指标体系也应适当加以调整,切实把握资源型城市转型力的主导因素,为我国资源型城市转型提供指导。

企业转型四步走

找准转型关注点,调整心态与思维,培养行为习惯,确保结果达成。AMBR(Attention,Mindset,Behavior,Result)是一个可用于指导企业转型实践的四步流程,涉及关注点(方向与目标)、心态、行为和结果四方面,如图1所示。AMBR四步法可以为企业转型提供一套清晰的路径与方法,帮助中高层管理者做好企业转型战略规划,在实践中少犯错误,少走弯路,带领团队开疆拓土。

商业银行转型执行力建设初探

转型执行力是执行力概念的派生或深化,是处于非常规状态中的银行转型期执行力。商业银行转型执行力的提出背景,就在于当前我国商业银行已进入经营转型时期,商业银行的经营转型已是大势所趋。转型执行力建设对于商业银行实现成功转型具有的特殊重要性,可从基本表现和一般表现两个方面分析和把握。

数字化转型三大误区与八个错误

路径如何选择,切入点如何确定,阻力如何克服,风险如何规避?如何做好数字化转型?如何提升数字化能力?如何提升数字化领导力?企业数字化转型不仅面临着诸多挑战,而且存在许多容易犯的错误。本文基于众多优秀企业数字化转型的实践,帮助企业管理者提升认知,掌握方法,构建能力,推动数字化转型。

电信企业战略转型的模型构建研究

进入新世纪以来,电信企业面临着新技术和新业务的冲击,面临着严重的竞争压力。为了提升企业的竞争力和效益,电信企业纷纷进行战略转型。电信企业转型成功与否与诸多因素有关,它既是一个系统的过程,也是一个长期的过程,成功的转型是在特定的条件约束下,通过企业实施战略决策,以客户需求为导向,合理调配各种资源,使相关资源因素获得效益最大化。

高绩效组织领导力转型初探

随着整个商业环境的变化,组织不断地寻求新的方式来适应环境的不确定,提高组织的绩效。高绩效组织的显著特征是从经典的命令控制式组织发展成为跨职能的参与式组织,组织领导力也从传统的控制型和交易型发展为授权型和转换型。新型的领导能力强调以信任为基石,通过授权来建立信任关系。

Experimental Study on Force Behavior of Steel Rein forced Concrete Transfer Beam Structure with Basement of Large Space

Based on comparative test of two transfer story models, in one of which the transfer beam and basement column is constructed of steel reinforced concrete, and the other is constructed of ordinary reinforced concrete, its force behavior, ductility and failure mechanism under vertical and horizontal loads are studied. The results show that loading bearing and seismic behavior of transfer story structure with steel reinforced concrete beam and basement column is good. The relative design suggestion is put forward.

小学校长学校文化建设认知现状分析——基于转型领导力的视角

学校文化建设是体现小学校长领导力的重要方面。研究主要采用深度访谈的方法,了解小学校长对于学校文化建设的认知及其行动,分析其实践行为与理论解读上的偏误。通过分析认为,学校文化建设是小学校长转型领导力发挥的重要载体,对于学校改进具有重要促进作用。在现实中,小学校长多未正确把握学校文化建设的基本内涵,在认知与实践上出现了偏差,影响了学校改进的效果,需要加以纠正。

Study on shift schedule saving energy of automatic transmission of ground vehicles

To improve ground vehicle efficiency, shift schedule energy saving was proposed for the ground vehicle automatic transmission by studying the function of the torque converter and transmission in the vehicular drivetrain. The shift schedule can keep the torque converter working in the high efficiency range under all the working conditions except in the low efficiency range on the left when the transmission worked at the lowest shift, and in the low efficiency range on the right when the transmission worked at the highest shift. The shift quality key factors were analysed. The automatic trans-mission's bench-test adopting this shift schedule was made on the automatic transmission's test-bed. The experimental results showed that the shift schedule was correct and that the shift quality was controllable.

Economic Transformation Capacities and Developmental Countermeasures of Coal-resource-based Counties of China

In China,the economic systems of many small-scale resource-based regions are confronted with realizing sustainable development through economic transformation. This paper,taking 37 coal-resource-based counties in China as objects,evaluates the economic transformation capacities of the counties by principal component analysis (PCA). Based on the comprehensive principal component values of >1,0–1 and <0,the economic transformation capacities of the counties are classified into strong,common and weak grades. Then,the paper proposes the developmental countermeasures according to different transformation capacities. For the counties with strong transformation capacities,it is crucial to make scientific positioning and rationally exploite resources in view of the developing characteristics and modes of those counties; as for the counties with common transformation capacities,the preparation and perfection of basic transformation conditions are still important aspects; as for the counties with weak transformation capacities,shifting from ″passive transfromation″ to ″active transformation″ in light of resources conditions is necessary.

公信力:社会政治与媒体互动——评《传播信任——转型期电视媒介公信力研究》

在传媒产业经过信息化、全球化浪潮席卷之后,媒体,特别是新媒体为政治、经济、文化等领域日趋多元的社会,既搭建了强有力的信息交流平台,又提供了转型社会所需的媒介资源。而自从媒体诞生以来,公信力就作为其生命基因而伴随其演进发展。媒体公信力直接受到包括政府公信力在内的全社会信用体系的影响,它的变化又是以社会语境为背景,因此,它被人们视为社会信用的感应器,受到社会公众、媒体从业人员和相关学术研究者的特别关注。

Kinetic model on coke oven gas with steam reforming

The effects of factors such as the molar ratio of H2O to CH4 (n(H2O)/n(CH4)), methane conversion temperature and time on methane conversion rate were investigated to build kinetic model for reforming of coke-oven gas with steam. The results of experiments show that the optimal conditions for methane conversion are that the molar ratio of H2O to CH4 varies from 1.1 to 1.3 and the conversion temperature varies from 1 223 to 1 273 K. The methane conversion rate is more than 95% when the molar ratio of H2O to CH4 is 1.2, the conversion temperature is above 1 223 K and the conversion time is longer than 0.75 s. Kinetic model of methane conversion was proposed. All results demonstrate that the calculated values by the kinetic model accord with the experimental data well, and the error is less than 1.5%.

Counter-Rotating Type Tidal Range Power Unit

The counter-rotating type tidal range power unit composed of the axial flow type tandem runners and the peculiar generator with double rotational armatures is proposed to utilize effectively the tidal range. In the unit, the front and the rear runners counter-drive the inner and the outer armatures of the generator, respectively. Besides, the flow runs in the axial direction at the rear runner outlet while the flow has not the swirling component at the front runner inlet, because the angular momentum change through the rear runner must coincides with that through the front runner. Such operations are suitable for bidirectional flows, namely working at the seashore with the rising and the falling tidal ranges, and the unit may be able to take place of the traditional bulb type turbines. To promote more the tidal power generation by this type unit, the runners were modified so as to be suitable for both rising and falling flows. The hydraulic performances are acceptable and take the optimum efficiency at the on-cam operation, while the trailing profiles of the runner blades determine mainly the theoretical output.

Numerical Flow Simulation in Turbine Mode of Counter-Rotating Type Pumping Unit to Cooperate with Wind Turbine

This serial research has proposed the hybrid power system combined the wind power unit with the counter-rotating type pump-turbine unit, to provide the constant output for the grid system, even at the suddenly fluctuating/turbulent wind circumstance. In this paper, the tandem impellers prepared for the counter-rotating type pumping unit were operated at the turbine mode, and the performances and the flow conditions were investigated numerically with accompanying the experimental results. Even though providing the pumping unit for the turbine mode, the maximum hydraulic efficiency is close to one of the counter-rotating type hydroelectric unit designed exclusively for the turbine mode. Besides, the runners/impellers of the unit work evidently so as to coincide the angular momentum change through the front runners/impellers with that through the rear runners/impellers, namely to take the axial flow at not only the inlet but also the outlet, without the guide vanes. From these results, it can be concluded that this type unit is effective to work at not only the pumping but also the turbine modes.

Kinetic Model and Simulation Analysis for Toluene Disproportionation and C9-Aromatics Transalkylation

A new kinetic model for commercial unit of toluene disproportionation and C9-armatiocs transalkylation is developed based on the reported reaction scheme.A time based catalyst deactivation function taking weight hourly space velocity(WHSV)into account is incorporated into the model,which reasonably accounts for the loss in activity because of coke deposition on the surface of catalyst during long-term operation.The kinetic parameters are benchmarked with several sets of balanced plant data and estimated by the differential variable metric optimiza- tion method.Sets of plant data at different operating conditions are applied to make sure validation of the model and the results show a good agreement between the model predictions and plant observations.The simulation analysis of key variables such as temperature and WHSV affecting process performance is discussed in detail,giv- ing the guidance to select suitable operating conditions.

A comprehensive comparative investigation of frictional force models for dynamics of rotor−bearing systems

Vibrations of a rotor-bearing system(RBS)can be affected by the frictional forces between the components of the inherent bearings.Thus,an in-depth investigation of the influences of the frictional moments of the bearings on the vibrations of the RBS can be helpful for understanding the vibration mechanisms in the rotating machinery.In this study,an improved dynamic model of a RBS considering different frictional force models is presented.A comparative investigation on the influences of the empirical and analytical frictional force models on the vibration characteristics of the RBS is proposed.The empirical frictional force models include Palmgren’s and SKF’s models.The analytical frictional force model considers the rolling friction caused by the radial elastic material hysteresis,slipping friction between the ball and races,viscosity friction caused by the lubricating oil,and contact friction between the ball and cage.The influences of the external load and rotational speed on the vibrations of the RBS are analyzed.The comparative results show that the analytical frictional force model can give a more reasonable method for formulating the effects of the friction forces in the bearings on the vibrations of the RBS.The results also demonstrate that the friction forces in the bearings can significantly affect the vibrations of the RBSs.

Thermodynamic Modeling of Wax Precipitation in Crude Oils

Most of the crude oils contain waxes which precipitate when temperature drops, resulting in deposition in pipelines and production equipment. It is necessary to set up a model which can predict the wax appearance tem-perature and the amount of solid precipitated in the different conditions. A modified thermodynamic solid-liquid equilibrium model to calculate wax precipitation in crude oil systems has been developed recently. The assumption that precipitated waxes consist of several solid phases is adopted in this research, and the solid-solid transition is also considered in the modified model. The properties of the pseudo-components are determined by using empirical correlations. New correlations for properties of solid-solid and solid-liquid transitions are also established in this work on the basis of the data from the literature. The results predicted by the proposed model for three crude oil systems are compared with the experimental data and the calculated results from the literature, and good agreement is observed.

Kinetics analysis of non-isothermal decomposition of Ag_2O-graphite mixture

The thermal decomposition kinetics of Ag2O-graphite mixture was systematically studied using a differential scanning calorimeter（DSC） in terms of model-fitting Malek approach, integral master plot method and model-free advanced isoconversional method of Vyazovkin. The results showed that the thermal decomposition occurred in two stages. The first step was the decomposition process of Ag2 O to form porous silver particles as a complex process with the participation of at least two mechanisms, and the second step corresponded to the structural change from porous particles to silver bulk crystals as a single-step process.

Bonding stress—slip constitutive behavior between bars and grout concrete

To establish bonding stress—slip constitutive model between bars and grout concrete,13 test specimens were employed to study the bonding behavior and the force transfer of bars adhered to grout concrete. The bonding stress development of bars adhered to grout concrete was analyzed. The local bonding stress—slip curve was obtained. Based on the test results,a new bonding stress— slip constitutive model between bars and grout concrete was proposed. The results show that the maximum bonding stress is not influenced by the bar bond length,but it is strengthened when the splitting strength of grout concrete is increased. The model matches the experimental results well,and the regressing coefficient equals 1.7.