《土壤肥料学》实验课程教学改革初探

通过分析传统的《土壤肥料学》实验课程教学中存在的问题,提出了在实验教学内容、方法、成绩考核及实验指导教师素质提高等方面的改革思路。     

《土壤肥料学实验》综合性教学初探

分析了《土壤肥料学实验》课验证性实验教学中存在的问题,并通过综合性实验教学与验证性实验教学的比较,总结了综合性实验教学在培养学生的实验动手能力、综合分析问题的能力以及在提高学生的综合知识和培养其团队精神等方面的作用,并对实验教学改革进行了初步的探讨.     

《土壤肥料学》多媒体教学与实验教学改革

本文分析了多媒体技术在《土壤肥料学》教学中的优势，提出可能存在的问题及解决办法；介绍了实验教学改革内容、方法及重要意义，以期与同行交流推进课程教学。     

“土壤肥料学实验”教学改革探索

“土壤肥料学实验”是高等学校园艺专业的重要基础课,是联系土壤肥料学理论与生产实践的重要环节。教学团队对“土壤肥料学实验”课程的教学内容和教学方法等进行了改革探索,主要包括：更新教学理念;优化教学内容;优化课程教学方法和改进考核方式;加强动手能力培养,实验与劳动教育、科研相结合。改革措施集知识传授与动手能力培养为一体,激发了学生的学习积极性,学生的综合素质和能力均得到了提高。     

慕课在土壤肥料学实验教学改革中的实践

土壤肥料学是农业高等院校农学大类本科生的专业基础课.因其与农业生产实践密切关联,土壤肥料学的实验教学就显得特别重要.本研究在总结现有土壤肥料学实验教学经验基础上,结合目前高校实验教学改革和慕课教学的理念,分析了土壤肥料学实验教学的现状、存在的问题,探讨了慕课用于土壤肥料学实验教学的特色、优势及初步效果,以期推进基于慕课的土壤肥料学实验教学改革.     

土壤肥料学综合性实验模式探索

文章以土壤肥料学配套实验课程《土壤农化分析II》的综合性实验为例,论述了综合性实验模式。体现了实验内容、实验手段等的综合。实践证明,综合性实验的开设是实验教学改革的方向,是素质教育的良好途径,是人才培养的重要举措。     

《土壤肥料学》实验教学改革与实践

在《土壤肥料学》实验教学改革与实践中,探索出了适合于该课程的教学模式,即以"抱着学生走"与"推着学生走"相结合,校内教师与校外专家相结合,室内实验与室外实验相结合的教学模式。     

新型综合性实验教学体系的研究、

从当前社会发展对高素质创新人才的培养要求出发，结合实验教学改革的具体目标，将植物生理学和土壤肥料学的部分实验内容大胆综合，提出一个实验教学的新体系。新型实验体系打破课程之间的界限，扩大了综合性实验的广度，加大了综合性实验的深度，强化了学生的动手能力和严谨的科学态度。     

关于土壤肥料学实验教学方法改进的思考

土壤肥料学是农科种植类专业一门重要的基础必修课程。为了让学生更好地掌握实验操作技能,为今后的学习、工作和科学研究打下坚实的基础,针对传统的土壤肥料学实验教学模式的不足提出改进方法。针对不同学生的专业背景实施因材施教;课前开展预备实验工作以保证实验课程顺利有效的进行;实行教学与学生自身情况相结合从而激发学生的学习兴趣;结合学习过程中遇到的实际问题以提高学生对实验结果的分析讨论能力。通过实验教学方法的改进,激发了学生的实验兴趣,提高了学生的实验操作技能和对结果的分析与讨论能力,取得了良好的实验教学效果。     

《中学物理教法实验》课程改革与实践

《中学物理教法实验》是高师物理教育专业一门必修课程,其目的在于提高学生的科学素养,培养学生的科学实验能力和中学物理实验教学能力.根据新的中学物理新课程标准的要求,对《中学物理教法实验》课程的课程体系、课程内容、教学方法和评价方式进行了改革,提高了师范生的综合实验教学能力.     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-