PDCA循环法用于专业硕士产教融合培养模式研究     

史建青  董春来  冯娜娜  王信祥 《测绘通报》2021,(3):152-155

为满足新时代对卓越工程技术人才的需求,本文在分析专业硕士培养现状基础上,从人才培养方案入手,提出了PDCA理念用于产教深度融合培养模式,讨论了产教深度融合培养的目标制定、计划落实、课程体系开发、导师团队优化及实践基地的质量保障建设等方面的模式与对策,论述了专业硕士研究生培养的质量监控体系,总结出教育教学各环节的计划、执行、考查、处理的持续改进和提高的螺旋式上升过程,为专业硕士高水平培养与管理提供参考与借鉴。  相似文献   

Ion acceleration and Alfvén wave generation at the Earth’s bow shock     

E. G. Berezhko  S. N. Taneev 《Astronomy Letters》2007,33(5):346-353

The processes of ion acceleration and Alfvén wave generation by accelerated particles at the Earth’s bow shock are studied within a quasi-linear approach. Steady-state ion and wave spectra are shown to be established in a time of 0.3–4 h, depending on the background level of Alfvénic turbulence in the solar wind. The Alfvén waves produced by accelerated ions are confined within the frequency range 10^?2–1 Hz and their spectral peak with a wave amplitude βB ～ B comparable to the interplanetary magnetic field strength B corresponds to the frequency v = (2–3) × 10^?2 Hz. The high-frequency part of the wave spectrum (v > 0.2 Hz) undergoes damping by thermal ions. The calculated spectra of the accelerated ions and the Alfvén waves generated by them reproduce the main features observed in experiments.  相似文献   

Classification of Complex Reservoirs in Superimposed Basins of Western China   总被引：4，自引：0，他引：4  

PANG Xiongqi  ZHOU Xinyuan  LIN Changsong  HUO Zhipeng  LUO Xiaorong  PANG Hong 《《地质学报》英文版》2010,84(5):1011-1034

<正>Many of the sedimentary basins in western China were formed through the superposition and compounding of at least two previously developed sedimentary basins and in general they can be termed as complex superimposed basins.The distinct differences between these basins and monotype basins are their discontinuous stratigraphic sedimentation,stratigraphic structure and stratigraphic stress-strain action over geological history.Based on the correlation of chronological age on structural sections,superimposed basins can be divided into five types in this study:(1) continuous sedimentation type superimposed basins,(2) middle and late stratigraphic superimposed basins,(3) early and late stratigraphic superimposed basins,(4) early and middle stratigraphic superimposed basins,and(5) long-term exposed superimposed basins.Multiple source-reservoir-caprock assemblages have developed in such basins.In addition,multi-stage hydrocarbon generation and expulsion,multiple sources,polycyclic hydrocarbon accumulation and multiple-type hydrocarbon reservoirs adjustment,reformation and destruction have occurred in these basins.The complex reservoirs that have been discovered widely in the superimposed basins to date have remarkably different geologic features from primary reservoirs,and the root causes of this are folding,denudation and the fracture effect caused by multiphase tectonic events in the superimposed basins as well as associated seepage,diffusion,spilling,oxidation,degradation and cracking.Based on their genesis characteristics,complex reservoirs are divided into five categories:(1) primary reservoirs,(2) trap adjustment type reservoirs,(3) component variant reservoirs,(4) phase conversion type reservoirs and (5) scale-reformed reservoirs.  相似文献   

Ag-rich Tetrahedrite in the El Zancudo Deposit,Colombia: Occurrence,Chemical Compositions and Genetic Temperatures     

Alba Nury Gallego Hernández  Masahide Akasaka 《Resource Geology》2010,60(3):218-233

Chemical compositions of tetrahedrite—Ag-rich tetrahedrite—freibergite solid solutions (Ag-rich tetrahedrite_ss) and homogenization temperatures of fluid inclusions in quartz and carbonates of seventeen samples from nine veins in the El Zancudo deposit, Antioquia, Colombia, were investigated to reveal the origin of silver in Ag-rich tetrahedrite_ss, to derive their crystallization temperatures and to examine the relationship between chemical compositions of Ag-rich tetrahedrite_ss and their crystallization temperatures. The ores consist of arsenopyrite, pyrite, sphalerite, Ag-rich tetrahedrite_ss, galena, boulangerite, andorite, owyheeite, diaphorite, jamesonite, miargyrite, bournonite, chalcopyrite, and electrum. Ag-rich tetrahedrite_ss forms about 10 volume % of the total ores and is one of the most common and widely distributed sulfosalts in this deposit. Ag-rich tetrahedrite_ss is rich in Ag (1.13 to 31.02 wt%) and Sb (22.93 to 29.82 wt%), and poor in As (0.06 to 2.43 wt%), consistent with the reported incompatibilities of Ag and As in Ag-rich tetrahedrite_ss. The Zn/(Zn + Fe)-, Ag/(Ag + Cu)- and Sb/(Sb + As + Bi)-atomic ratios exhibit some variations among the veins. Ag-rich tetrahedrite_ss with higher Ag/(Ag + Cu) ratios coexist with diaphorite, whereas those with lower ratios are not associated with this sulfosalt. Ag-rich tetrahedrite_ss in the assemblages of Ag-rich tetrahedrite_ss+ sphalerite and of Ag-rich tetrahedrite_ss+ bournonite + galena shows no Zn ↔ Fe and Cu ↔ Ag variations between core and rim, respectively, negating the possibility of solid state reaction during cooling. Ag-rich tetrahedrite_ss is thus regarded as primary phase. Homogenization temperatures of primary fluid inclusions in quartz and carbonates co-existing with Ag-rich tetrahedrite_ss define the mineralization temperatures of 134 to 263°C. Independent crystallization temperatures of Ag-rich tetrahedrite estimated based on Zn/(Zn + Fe) and Ag/(Ag + Cu) ratios of the Ag-rich tetrahedrite_ss associated with silver minerals such as miargyrite, andorite and diaphorite using Sack's thermochemical database lie in a range between 170 and ∼250°C. Both results are thus in good agreement.  相似文献   

Définition et datation de la Formation de Venaco (Corse) : dépôt d’origine gravitaire d’âge Priabonien     

Jean Ferrandini  Michelle Ferrandini  Philippe Rossi  Brengre Savary-Sismondini 《Comptes Rendus Geoscience》2010,342(12):921-929

Priabonian age is highlighted for the first time in Corsica in the Venaco Formation using the presence of specific microfauna (in particular some representatives of Turborotalia cerroazulensis lineage). This silicoclastic formation is mainly represented by coarse facies. It is composed of three members from south to north and from oldest towards youngest: member of Uboli, Cardo and Orsu. The sedimentologic analysis reveals a gravity depositional environment, involving different type of currents. Sedimentologic and chronologic characteristics make the Venaco Formation and the Annot Formation (p.p.) equivalent. Dating the Venaco Fm. brings confirmation that the green schist metamorphism of the Variscan batholith and the related deformation are from the pre-Priabonian period.  相似文献   

基于Ripley’s K函数浙江城市空间格局及其影响分析     

葛莹  朱国慧  王华辰  赵慧慧 《地理科学》2014,(11):1361-1368

以Ripley′s K函数为核心,通过城市区位与规模联立估计、地理权重引入、全局函数分解等手段,研究2001~2010年浙江省已有县级及以上城市空间分布的总体及局部估计问题,探讨城市空间格局与特征,以期揭示边界效应和市场潜力对浙江城市空间格局的影响机理。结果表明:1浙江省城市区位与规模的空间格局不一致,即前者是分散分布而后者是集聚分布,且随着空间尺度的增加,其分散或集聚程度逐步加强。2无论是行政边界还是海岸线,对浙江省城市区位与规模的空间分布演化有一定的负向作用。空间尺度越大,边界负效应越强。3在城市化发展过程中,浙江形成了3个各具产业特色的块状组团式城市聚集区,但边界负效应会抑制它们的发展,此时杭州、宁波将承担起服务全省经济的重要职责。4浙江城市规模因受市场潜力因素的影响会出现空间分布不均衡性。城市规模与市场潜力显著正相关,其程度却随着空间尺度的增加而减小。  相似文献   

粒子群优化算法（PSO）在四元体系Na^＋,K^＋//Cl^-,SO4^2--H2O 323K相平衡计算中的应用     

桑世华  ;崔瑞芝  ;曾晓晓  ;黄旺银 《盐湖研究》2014,(2):43-48

最优粒子群算法(PSO)近年在非线性方程模拟计算中广泛应用。应用文献报道的Pitzer方程参数与温度的关联方程计算了323 K时该四元体系中有关盐的Pitzer方程单盐参数、混合离子相互作用参数和盐的溶解平衡常数K,在此基础上应用Matlab工程计算软件和粒子群优化算法(PSO)编写了相应的Pitzer方程计算程序,对323 K时四元体系Na⁺,K+,K⁺//Cl+//Cl^-,SO_4-,SO_4^(2-)-H_2O的溶解度数据进行理论模拟计算,并用计算出的溶解度数据绘制出该四元体系323 K时的相图。计算结果表明,溶解度的模拟计算值与实验值吻合较好,验证了该算法的适用性和实验数据的可靠性,同时也表明含有合理Pitzer模型参数的PSO算法程序可以计算多温条件下的水盐体系相平衡关系。  相似文献   

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������  ������  �ŷ� 《大地测量与地球动力学》2014,34(6):37-40

???1999??2012???????????????????????????????λ????????????????????????λ??????GPS??????????????????????仯?????????о?????????????λ??GPS????????仯??????????????????仯?????????????????????????????????????λ????????GPS?????????С????ζ??????????????????????λ???????GPS?????????????ζ??????3??????????λ?仯????GPS????????????????г????????  相似文献   

Variability of tropical cyclone in high frequent occurrence regions over the western North Pacific   总被引：1，自引：0，他引：1  

Yuxing Yang  Fei Huang  Faming Wang 《中国海洋大学学报(英文版)》2014,13(3):347-355

In this study, three high frequent occurrence regions of tropical cyclones(TCs), i.e., the northern South China Sea(the region S), the south Philippine Sea(the region P) and the region east of Taiwan Island(the region E), are defined with frequency of TC's occurrence at each grid for a 45-year period(1965–2009), where the frequency of occurrence(FO) of TCs is triple the mean value of the whole western North Pacific. Over the region S, there are decreasing trends in the FO of TCs, the number of TCs' tracks going though this region and the number of TCs' genesis in this region. Over the region P, the FO and tracks demonstrate decadal variation with periods of 10–12 year, while over the region E, a significant 4–5 years' oscillation appears in both FO and tracks. It is demonstrated that the differences of TCs' variation in these three different regions are mainly caused by the variation of the Western Pacific Subtropical High(WPSH) at different time scales. The westward shift of WPSH is responsible for the northwesterly anomaly over the region S which inhibits westward TC movement into the region S. On the decadal timescale, the WPSH stretches northwestward because of the anomalous anticyclone over the northwestern part of the region P, and steers more TCs reaching the region P in the greater FO years of the region P. The retreating of the WPSH on the interannual time scale is the main reason for the FO's oscillation over the region E.  相似文献   

Characterization of fisheries dependence in Galicia (Spain)     

《Marine Policy》2014

The management of marine ecosystems requires adequate knowledge of both environmental and human dimensions, as well as their interrelationships. In this study, the aquaculture and fisheries activities are analyzed in one of most important fishing regions in Europe, Galicia (NW Spain). In particular, the intensity and characteristics of the fishing dependency are evaluated in terms of income and employment. Thus, nine marine economic activities for nine Maritime Zones have been defined, considering the social and economic relevance of the provided ecosystem services to these communities. This paper highlights the entire Galician coast as fishing-dependent, independently of the urbanization level. Furthermore, the contribution of different fishery segments to the income and employment of these coastal communities is reviewed, including fluctuations on whether the activity is small or large-scale. Finally, this study establishes a strong relationship among the marine activities, which generate most employment, and the regulatory framework of the Regional Government. Therefore, the conclusions are relevant to design and implement policies that affect Galicia׳s Region and all its related marine ecosystems.  相似文献