The composition of dramatic experience: The play element in student electronic projects

Although the transformative significance of play has been recognized by a multidisciplinary array of scholars, resistance to play in composition studies continues today, even in the computers and composition subfield. Foundational to the process approach to composition instruction, play is an element in modernist and postmodernist rhetorics based on Kenneth Burke’s (1994) dramatism, William Covino’s (1995) and James Seitz’s (1991) validation of experimentation, and Richard Lanham’s (1993) dialectic of seriousness and play in the Western tradition. Joseph Janangelo (1998) developed this trend by suggesting sophisticated college art as a model for effective hypertext. Analysis of two student group HyperCard projects and a MOO (multiuser domain, object-oriented) project reveal that the play element can enrich readerly experience through the creation of a dramatic experience of information. Composition instructors need to recognize the play element in computer-based composition and encourage the development of serio-ludic discourse through mutual consideration of models by instructors, students, and others.     

Effect of electrolyte on the supercapacitive behaviour of copper oxide/reduced graphene oxide nanocomposite

Cupric oxide/reduced graphene oxide (CuO/rGO) nanocomposites were synthesized through a chemical reduction method using hydrazine hydrate as the reducing agent. The morphology, elemental composition, and bonding network of the CuO/rGOnanocomposites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy respectively. The XRD results reveal lattice spacing and lattice strain from 3.371 to 3.428 Å and 1.05 × 10⁻³to 5.44 × 10⁻³ respectively, with the increasing ratio of rGO: CuO from 1:1 to 1:5. The cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS)and galvanostatic charge-discharge (GCD) studyofCuO/rGOas the electrode material showed excellent super-capacitive behavior in H₂SO₄ over Na₂SO₄ electrolytes. Moreover CuO/rGO nanocomposites exhibited better capacitance retention in H₂SO₄(75.69%) compared to Na₂SO₄(12.06%).     

A study of gas transport through interfacially formed poly(N,N-dimethylaminoethyl methacrylate) membranes

Gas transport through interfacially formed poly(N,N-dimethylaminoethyl methacrylate) membranes was investigated. The membrane performance for the separation of binary CO₂/N₂, CO₂/CH₄ and CO₂/H₂ mixtures was studied, and the coupling effects between the permeating species were evaluated by comparing the permeance of individual components in the mixture with their pure gas permeance. For the permeation of these binary gas mixtures, the presence of CO₂ was shown to influence the permeation of the other components (i.e., N₂, H₂ and CH₄), whereas the permeation of CO₂ was not affected by these components. In consideration that water vapor is often encountered in applications involving CO₂ separation, the presence of water vapor on the membrane permselectivity was also studied. When hydrated, the membrane was shown to be more permeable to CO₂, while the membrane selectivity did not change significantly. Unlike membranes based on size-sieving of penetrant molecules, the present membranes exploit the favorable interactions between the hydrophilic quaternary amines in the membrane and CO₂, especially in the presence of water vapor in the feed.     

Et3NHCl/AlCl3离子液体物性的研究

C4烷基化是生产高辛烷值清洁汽油调合组分的重要工艺。Et3NHCl/AlCl3离子液体催化烷基化工艺,中试试验表明其具有较好的催化活性和选择性。因此探索Et3NHCl/AlCl3系列的离子液体的基础物性对研究复合离子液体的物性提供参考。本论文合成了6种不同摩尔比的Et3NHCl/AlCl3离子液体,测定这6种离子液体的密度、粘度、熔点和溶解度,并且考察了温度对物性的影响。     

Lubricating properties of oil-in-water emulsion with low oil concentration:Competitive wetting effect

Oil-in-water(O/W) emulsions are widely used in metal working such as hot rolling and cutting.Three kinds of O/W emulsions with low oil concentration were prepared which include conventional emulsion(CE),miniemulsion(MNE) and microemulsion(ME).The lubricating properties of O/W emulsions with low oil concentration were investigated using the tribological testers and the thin film interferometry based on the relative optical interference intensity method.The tribological test results under boundary lubrication show that the friction coefficient and the total losing weight can be clearly seen:CE < MNE < ME.The lubricating film thicknesses under elastohydrodynamic lubrication and thin film lubrication show that a relationship of the film formation abilities:CE > MNE > ME.Competitive wetting behavior of water and oil on solid surface was confirmed to play an important role in the film formation and tribological behaviors of O/W emulsion.     

Numerical investigation of electrostatic effect on particle behavior in a 90 degrees bend

Particle behavior in a turbulent circular-sectioned 90° bend under electrostatic field at three air flow rates (1600 L/min, 1100 L/min and 950 L/min, the corresponding bulk Reynolds numbers are 58,000, 40,000, 34,000) is simulated by a Large Eddy Simulation-Lagrangian particle tracking technique (LES-LPT) method coupled with electrostatic field model by Coulomb’s law. This numerical simulation is dedicated to study the electrostatic effect on particle behavior and erosion occurred in the dilute particle-laden bend flow. Forces considered acting on particles includes drag, lift, gravity and electrostatic force. Results obtained for the fluid phase are in good agreement with experimental and numerical data. Predictions show that electrostatic field does affect the particle motion in the pipe bend. At higher air flow rate with higher electrostatics at the inner arc the increasement of impact angle is lower than that at lower flow rate with lower electrostatics. The same conclusion can be found at the outer arc. In addition, electrostatic effect does increase particle-wall impact velocity while such trend decreases with flow rate. Erosion rate increases with increasing air flow rate, which is independent of electrostatics. However, given the same flow rate, the electrostatics reduces the occurrence of erosion at the bend. The erosion rate under electrostatic effect is found to approach that without electrostatics as the flow rate increases. Therefore, the effect of electrostatics on erosion decreases with the air flow rate.     

过冷度对地热发电非共沸工质有机朗肯循环热力性能的影响

有机朗肯循环（organic Rankine cycle,ORC）是利用中低温地热能（< 150℃）发电的主要途径,在实际运行中,非共沸工质往往会冷凝至过冷状态。分析了冷凝过冷度对非共沸工质ORC热力性能的影响,建立了ORC、内回热（internal heat exchanger,IHE）ORC的热力学模型,以净输出功最大为目标函数优化了工质的蒸发压力,并开展了系统的㶲分析。结果表明：过冷度影响了工质与冷源换热流体间的温度匹配特性,受夹点温差的限制,随着过冷度的增加,工质的冷凝压力上升;过冷度亦改变了预热器和蒸发器的热量分摊,随着过冷度的增加,最佳蒸发压力亦上升。混合工质异丁烷/异戊烷的质量配比为0.4：0.6时,净输出功受过冷度的影响最大,当过冷度为2℃时,净输出功下降了4.36%。IHE回收膨胀机排汽的余热,提高了预热器入口温度,可提高过冷ORC系统净输出功0.55%。过冷度增大了冷凝器的㶲损失;采用内回热冷凝器的㶲损失降低了24.7%。     

Reputation rating modeling for open environment lack of communication by using online social cognition

This paper defines the available reputation rating models at present from the viewpoint of set theory. Furthermore, to solve the problem that present reputation models fail in the condition of open environment without previous exchanging information, i.e. lack of participant's communication and evidence, online social cognition reputation ratings model is offered. Information seeking online is used to achieve the online behaviors for rating and the reputation can be evaluated by social experience in virtual world based on individual and group social cognition according to the definition of online social cognition set in this model. As online social cognition experience is drawled from a sample set of the open system, when a newcomer enter the evaluation set default reasoning is used to guarantee the model's extension. Finally, the reputation rating evaluation in Health Care Products Web site demonstrates the validity of the model and the results also show that group online social cognition is better than individual's.     

附着型硫酸盐还原菌的分离及其定量检测

针对附着型硫酸盐还原菌(A-SRB)对管道和罐壁的腐蚀问题,应用Hungate厌氧技术对附着型硫酸盐还原菌进行分离、系统发育分析和定量检测研究.研究表明,在地面系统中的SRB菌里,附着型SRB菌占多数,该菌株主要分布在厚壁菌门梭菌纲(Clostridia)、变形菌门的γ-变形菌纲(Gammaproteobacteria)和δ-变形菌纲(Deltaproteobacteria),其中梭菌属(Clostridium)为优势菌属,附着型的硫酸盐还原菌的种类比较新颖.通过安装在管壁上的检测装置和绝迹稀释法(MPN)联用实现附着型SRB菌的定量检测,该技术已在油田生产中实际应用.