多价值链协同模拟空间数字高程统计的制造生产风险建模

随着全球产业价值链的调整升级,一个国家如何在固有状态下有效提升在全球价值链中的地位和作用成为经济发展的关键。制造业作为能源经济发展的基础化产业,提升其产业基础能力和风险管控水平具有重要意义。从多价值链协同角度对制造生产风险进行研究,建立了模拟空间数字高程统计模型,对影响制造生产风险的多维影响因素进行统计分析,设定多价值链协同的制造生产风险决策目标及约束条件,建立了制造生产风险决策模型,提出对制造业生产经营有效的风险管理策略。研究结果表明,只有保障生产规模在合理范围内,才能使得多价值链各环节风险协同降低,从而有效控制整体制造生产风险水平。     

数字经济驱动产业结构升级的空间效应 ——兼论数字经济与实体经济融合的中介作用

在理论阐释数字经济驱动产业结构升级的机制基础上，基于2013—2019年中国除西藏地区外30个省份的面板数据测算数字经济发展水平，运用空间杜宾模型分析数字经济驱动我国产业结构升级的空间溢出效应，并构建中介效应模型揭示数字经济与实体经济融合的中介作用机制。研究结果显示，数字经济对产业结构升级的促进作用显著，本地区数字经济发展对邻近地区产业结构升级存在正向空间溢出效应，金融规模扩大能够显著促进本地区产业结构升级，而政府干预过多则不利于本地区产业结构升级发展。数字经济能够通过与实体经济融合来驱动产业结构升级，且数实融合的中介作用稳健。     

创新效率对亚太国家国际分工地位的影响——基于生产分解模型研究

基于生产分解模型下的全球价值链(GVC)地位指数,衡量了亚太17国的国际分工地位,发现日本、美国、新加坡、韩国的分工地位较高。在利用DEA模型计算创新效率得到2010—2016年面板数据的基础上,构建实证模型分析创新对亚太国家GVC地位的影响。结果表明,创新效率不仅能稳健地促进GVC地位升级,而且与生产率和基础设施存在正向调节作用效应;上游度指数是主要影响渠道。在差异性分析中,进一步发现创新对中高等收入国家和中低技术产业的影响作用更强。研究结论为亚太不同国家产业国际分工地位的攀升提供了方向。     

全球价值链位置对制造业创新的影响——基于出口退税的门槛效应

采用中国海关数据库、UIBE＿GVC index数据库和中国产业层面出口退税率数据，考察全球价值链位置对中国制造业创新的影响及出口退税在全球价值链位置影响创新过程中的门槛效应。研究表明：全球价值链位置与制造业创新存在倒U型关系，全球价值链位置的上升显著激励制造业的创新活动，当全球价值链位置达到一定高度时，负向影响制造业创新；在考虑内生性问题后，结果仍然稳健；出口退税在全球价值链位置影响制造业创新过程中发挥门槛效应，当出口退税跨越门槛后，全球价值链位置攀升对制造业创新的促进作用增强。     

全球价值链视角下我国产业集群转型升级影响因素研究

分析产业集群转型升级应当从全球价值链角度开展,这是当前相关研究的前沿问题。由于国内外各项制约因素的存在,中国实现产业集群转型升级以提升在全球价值链中地位困难重重。在分析世界与中国产业集群的现状的基础上,构建计量经济模型,实证检验了全球价值链视角下产业集群转型升级的影响因素,结论认为:人力资本供给质量、服务化水平、价值链治理强度、政策支持力度对转型升级具有显著正向影响,但FDI强度却抑制了转型升级。     

数字经济对地区出口产品质量升级的影响及作用机制研究

基于2011—2019年中国省级面板数据，构建数字经济发展评价体系，并运用双向固定效应模型探究数字经济对地区出口产品质量升级的影响。研究结果表明：数字经济显著促进出口产品质量的升级，且存在区域异质性，表现为东、中部地区出口产品质量升级从数字经济发展中获益更多，西部未获得显著红利。进一步发现，数字经济在通过驱动区域创新提升出口产品质量过程中存在显著的创新主体异质性，作用强度表现为“企业>高校>科研机构”。最后，借助门限模型研究发现，数字经济对出口产品质量升级存在非线性影响，即数字经济对数字化程度较高的地区促进作用更强，存在后发劣势。     

浦东之路：集聚高端要素，提高全球价值链地位

经济全球化推动了基于全球价值链的新型国际分工体系的建立和发展、浦东与我国其他地区一样,依靠丰富的劳动力资源、较强的产业配套和加工制造能力融入全球价值链。随着全球化2.0时代的来临,应集聚高端要素,从嵌入全球价值链到重塑全球价值链,提升全球价值链地位,促进浦东转型,推动城市功能升级,构建全球城市的核心功能区。     

全球价值链下影响我国地方产业集群升级的因素

在经济全球化的今天，产业集群升级作为提升区域竞争力的有效途径正迅速嵌入全球价值链。我国地方产业集群已初具规模，有一定成本优势。要实现产业集群的升级和持续快速发展应在全球价值链中寻求路径，对影响我国产业及群升级的因素进行分析是必要的。     

数字经济发展对产业结构升级的影响及其区域差异

通过对数字经济发展影响产业结构升级的路径加以理论分析，构建了数字经济和产业结构升级的衡量指标，并运用2015年～2020年全国省级面板数据进行空间计量检验.结果表明：(1)数字经济发展存在正的空间自相关性，邻近区域之间发展呈现出一定的集聚特征；(2)数字经济发展可以有效地促进本地区产业结构升级，同时对周边地区产生正的空间溢出效应，且这种促进作用呈现出区域异质性，东部地区作用效果最为显著，西部地区效果最差；(3)固定资产投资、城市化水平提高在促进本地区产业结构升级的同时对周边地区造成负的溢出效应；(4)政府干预过多不利于产业结构优化升级；(5)技术创新存在正的溢出效应，但由于目前国内创新能力较为薄弱，技术创新的推动作用不够明显.根据这些结论为更好发挥数字经济对产业结构升级的促进作用提出相关政策建议.     

经济全球化与"中国制造":一个基于价值链增值视角的研究

本文通过对现有理论的阐述和分析,提出制造业价值链增值的“哑铃”型结构特征,并在深入分析“中国制造”中全球制造业中的地位的基础上,提出要充分利用外部资源加快禀赋结构的升级,用“以竞争求技术”替代“以市场换技术”,采用信息化延伸制造业价值链,从面实现在全球制造业价值链中的增值效应。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.