中国外资银行空间网络演化的结构特征及其影响因素

本文基于外资银行网点数据,借鉴连锁型网络模型,构建了1990年、2001年和2015年中国外资银行空间网络并分析演化结构特征,最后借助条件Logit模型探讨了外资银行空间分布的影响因素。研究表明：①中国外资银行空间网络小世界网络特征明显,具有较大的集聚系数和较小的平均路径长度,网络中局域小集团网络化特征和核心-边缘结构明显。②随着网络规模的平稳增长,网络的有序性呈现出增强趋势,网络中金融连接度和金融可达性增加,金融传输效率和组织效率进一步提高,核心-边缘结构现象有所加剧。③外资银行空间分布的主导因素在不同时期不一样,1990年主导因素是市场机会和区位效应,2001年和2015年的主导因素是金融集聚,但指标的具体影响概率有所降低。     

What Can the State Do for You?

It has been suggested that Swedish policy during the early post-war period was strongly directed towards mobility-increasing expenditures – most notably relocation allowances – aimed at moving labour from north to south. While this view has dominated the academic discussion on labour market policy, there is little direct evidence. We make three claims. First, the relocation allowances have to be evaluated against the regional policy. Second, by doing so we show that the mobility-oriented policy was predominant only for a short period of time: in the early 1970s, there was a decisive shift towards a policy directed at stimulating employment in the north. Third, drawing on this, we revaluate the previous view on policy making in Sweden. Our analysis suggests that the Social Democratic government acted in a voter-maximizing way. The relocation allowances were introduced at the behest of the Trade Union Confederation (LO). The regional subsidies were expanded when voter sentiment turned against the perceived depletion of rural regions. However, this strategy interacted with the political and institutional environment. The new election law in 1970 and political competition from the Centre Party pushed the Social Democrats to shift their policies on regional subsidies.     

A connectivity model as a potential tool for smart specialization strategies

The article contributes to the smart specialization literature by presenting a new approach, connectivity analysis, where Triple Helix (TH) relations (involving universities, companies and government) are at the centre of the entrepreneurial discovery process. Relations between helices may be seen, from the point of departure of proximity, as preconditions of connectivity, or interaction, measured through expectations and experiences. This offers potential solution to two limitations of proximity approach: its static nature and narrow focus on dyadic relationships. The connectivity analysis reveals the extent of mutual expectations, as well as tensions, or gaps. Based on this analysis, the article presents a policy model that is used to map structures of networks and gaps between TH actors. It may also identify strengths, weaknesses and problems. This analysis is used as input to structured dialogues between actors in leading positions in the TH and in smart specialization policy-making and implementation. This approach may lead to policy interventions supporting entrepreneurial discoveries. The model has been developed in partnership with researchers and the Regional Council of Ostrobothnia. The article also presents this case study and demonstrates the use of the connectivity model in practice.     

考古地层的三维建模方法在秦始皇帝陵考古勘探中应用尝试

为了更清楚地展示秦始皇帝陵地区考古地层的三维空间关系,并为后期考古工作中空间数据挖掘做准备,借鉴三维地质建模技术,提出了考古地层三维建模方法。基于探孔数据构建了考古地层三维模型。该模型清楚地展示了秦始皇帝陵地区考古地层的三维空间关系,为田野考古数字化工作提供一种新思路、新方法。     

山西省万荣县寿圣寺塔的多视角影像三维重建

为了制定山西省万荣县寿圣寺塔的保护规划方案,需制作具有真实纹理的三维模型,但砖塔等大型不可移动文物的三维重建难度很大,制作成本一直很高。为此,本研究运用无人机拍摄和地面拍摄多视角影像的技术,制作寿圣寺塔的三维模型,生成各个立面的正射影像图,量算砖塔的高度、宽度等尺寸数据,为这类文物的三维重建提供一种新的技术和方法。     

Fluid effect on hydraulic fracture propagation behavior: a comparison between water and supercritical CO2‐like fluid

The initiation of hydraulic fractures during fluid injection in deep formations can be either engineered or induced unintentionally. Upon injection of CO₂, the pore fluids in deep formations can be changed from oil/saline water to CO₂ or CO₂ dominated. The type of fluid is important not only because the fluid must fracture the rock, but also because rocks saturated with different pore fluids behave differently. We investigated the influence of fluid properties on fracture propagation behavior by using the cohesive zone model in conjunction with a poroelasticity model. Simulation results indicate that the pore pressure fields are very different for different pore fluids even when the initial field conditions and injection schemes (rate and time) are kept the same. Low viscosity fluids with properties of supercritical CO₂ will create relatively thin and much shorter fractures in comparison with fluids exhibiting properties of water under similar injection schemes. Two significant times are recognized during fracture propagation: the time at which a crack ceases opening and the later time point at which a crack ceases propagating. These times are very different for different fluids. Both fluid compressibility and viscosity influence fracture propagation, with viscosity being the more important property. Viscosity can greatly affect hydraulic conductivity and the leak‐off coefficient. This analysis assumes the in‐situ pore fluid and injected fluid are the same and the pore space is 100% saturated by that fluid at the beginning of the simulation.     

The Transportation Sector of India's Economy: Dry Ports as Catalysts for Regional Development

Two East Asian specialists review the development of dry ports in India as part of a broader national program to eliminate transportation bottlenecks, improve transport efficiency, and spur the economic development of interior regions by lowering road and rail freight tariffs, and thus decreasing the costs of imports (and making exports more competitive). A key focus is on comparing the relative efficiency of public- versus private-sector operation of dry ports, and on examining the effects on dry port efficiency of current Indian Government policy. The authors test two hypotheses relating to the efficiency of port operations using information derived from their field study/interviews at 28 dry ports in Northwest India (reflecting three different types of ownership/operation combinations) as well as quantitative data measuring port efficiency.     

Thermal convection in faulted extensional sedimentary basins: theoretical results from finite-element modeling

Thermal convection has the potential to be a significant and widespread mechanism of fluid flow, mass transport, and heat transport in rift and other extensional basins. Based on numerical simulation results, large‐scale convection can occur on the scale of the basin thickness, depending on the Rayleigh number for the basin. Our analysis indicates that for syn‐rift and early post‐rift settings with a basin thickness of 5 km, thermal convection can occur for basal heat flows ranging from 80 to 150 mW m^?2, when the vertical hydraulic conductivity is on the order of 1.5 m year^?1 and lower. The convection cells have characteristic wavelengths and flow patterns depending on the thermal and hydraulic boundary conditions. Steeply dipping extensional faults can provide pathways for vertical fluid flow across large thicknesses of basin sediments and can modify the dynamics of thermal convection. The presence of faults perturbs the thermal convective flow pattern and can constrain the size and locations of convection cells. Depending on the spacing of the faults and the hydraulic properties of the faults and basin sediments, the convection cells can be spatially organized to align with adjacent faults. A fault‐bounded cell occurs when one convection cell is constrained to occupy a fault block so that the up‐flow zone converges into one fault zone and the down‐flow zone is centred on the adjacent fault. A fault‐bounded cell pair occurs when two convection cells occupy a fault block with the up‐flow zone located between the faults and the down‐flow zones centred on the adjacent faults or with the reverse pattern of flow. Fault‐bounded cells and cell pairs can be referred to collectively as fault‐bounded convective flow. The flow paths in fault‐bounded convective flow can be lengthened significantly with respect to those of convection cells unperturbed by the presence of faults. The cell pattern and sense of circulation depend on the fault spacing, sediment and fault permeabilities, lithologic heterogeneity, and the basal heat flow. The presence of fault zones also extends the range of conditions for which thermal convection can occur to basin settings with Rayleigh numbers below the critical value for large‐scale convection to occur in a basin without faults. The widespread potential for the occurrence of thermal convection suggests that it may play a role in controlling geological processes in rift basins including the acquisition and deposition of metals by basin fluids, the distribution of diagenetic processes, the temperature field and heat flow, petroleum generation and migration, and the geochemical evolution of basin fluids. Fault‐bounded cells and cell pairs can focus mass and heat transport from longer flow paths into fault zones, and their discharge zones are a particularly favourable setting for the formation of sediment‐hosted ore deposits near the sea floor.     

司徒美堂与抗日战争

美洲著名爱国侨领司徒美堂为祖国抗战做出了重大的贡献。他从九一八事变后即率先投身于抗日救亡运动,积极声援自发奋起抗战的国民党官兵;全国抗战爆发后,他出任抗日救国侨团的首领,带领广大华侨开展抗日救亡活动;他万里迢迢回国慰劳抗日军民,为祖国抗战出计献策,在途经香港陷入日军魔掌的危险时刻,表现出了铁骨铮铮的民族气节;他团结美洲洪门侨胞,报效祖国抗战,使这一古老的帮会组织焕发青春;他呼吁祖国团结抗战,反对妥协投降,有力地维护了国共合作抗战的大局。他是广大华侨抗日救国的领袖和楷模,其爱国思想在支援祖国抗战中进一步得到升华。