油画的意与形在高中美术教学创作中的实验性应用

在中国历史上出现了很多在油画上造诣颇深的伟大人物,如徐悲鸿。油画在发展过程中越来越注重意与形的结合,即内在和外在的统一,是油画栩栩如生。在高中美术教学创作中教师应把意与形的统一融入油画教学。本文将对油画的意与形作一定阐述,并举例说明其在高中美术教学创作中的应用。

Calcareous Sodic Soil Reclamation as Affected by Corn Stalk Application and Incubation: A Laboratory Study

A laboratory lysimeter experiment was conducted to investigate the effects of forage corn （Zea rncbys L.） stalk application on the CO2 concentration in soil air and calcareous sodic soil reclamation. The experimental treatments tested were soil exchangeable sodium percentage （ESP） levels of 1, 11, and 19, added corn stalk contents of 0 to 36 g kg^-1, and incubation durations of 30 and 60 days. The experimental results indicated that corn stalk application and incubation significantly increased CO2 partial pressure in soil profile and lowered pH value in soil solution, subsequently increased native CaCO3 mineral dissolution and electrolyte concentration of soil solution, and finally significantly contributed to reduction on soil sodicity level. The reclamation efficiency of calcareous sodic soils increased with the added corn stalk. When corn stalks were added at the rates of 22 and 34 g kg^-1 into the soil with initial ESP of 19, its ESP value was decreased by 56% and 78%, respectively, after incubation of 60 days and the leaching of 6.5 pore volumes （about 48 L of percolation water） with distilled water. Therefore, crop stalk application and incubation could be used as a choice to reclaim moderate calcareous sodic soils or as a supplement of phytoremediation to improve reclamation efficiency.

Dynamic Performance of a Semi-Submersible Platform Subject to Wind and Waves

By applying experimental and numerical simulations, the motion performance of a semi-submersible platform with mooring positoning system under combined actions of wind and waves is studied. The numerical simulation is conducted by the method of nonlinear time domain coupled analysis, and the mooring forces are calculated by the piecewise extrapolating method. The scale in the model experiment is 1:100, and the mooring system of the model is designed with the method of equivalent water-depth truncation by comparing the numerical and the experimental results, the platform motion and mooring forces subject to wind and waves are investigated. The results indicate that the numerically simulated mooring forces agree well with the experimental results in static equivalent field, but show some difference in dynamic equivalent field; the numerically simulated platform motions coincide well with the experimental results. The maximum motion of the platform under operating conditions is 20.5 m. It means that the horizontal displacement is 2% less than the water depth, which satisfies the operating requirements.

Control Experimental Study on the Application of Acupuncture Therapy to the Treatment of Peripheral Facial Neuritis in Acute Phase and Its Nursing

Objective： This study aimed to prove acupuncture therapy exerted an obvious clinical efficacy in the treatment of peripheral facial neuritis in acute phase. Methods： 60 clinically collected cases were chosen in the study and randomly divided into control group and treatment group. In control group, dexamethasone, vitamin B, vitamin B 12, and mecobalamine were applied in acute phase, and then acupuncture therapy was combined in remission. In treatment group, western medicine combining with acupuncture therapy was used in acute phase, and three courses of treatment were totally applied. Results： The final conditions of two groups were good, and the grouping was balanced, so the comparability between them was good （P〉0.05）; the curative effects of two groups were significantly different： the effect of treatment group was better than that of control group （P〈0.01）. Conclusion： The acute phase was necessarily grasped to apply acupuncture therapy to the treatment of peripheral facial neuritis, and the curative effect would be more significant if acupuncture therapy was more early used.

Experimental investigations on the heat transfer characteristics of micro heat pipe array applied to flat plate solar collector

This paper introduces a novel fiat plate solar collector （FPC） using micro heat pipe array （MHPA） as a key element. To analyze the thermal transfer behavior of flat plate solar collector with micro heat pipe array （MHPA-FPC）, an indoor experiment for thermal transfer characteristic of MHPA applied to FPC was conducted by using an electrical heating film to simulate the solar radiation. Different cooling water flow rates, cooling water temperatures, slopes, and contact thermal resistances be- tween the condenser of MHPA and the heat exchanger were tested at different heating powers. The experimental results in- dicate that MHPA-FPC exhibits the enhanced heat transfer capability with increased cooling water flow rate and temperature. Total thermal resistance has a maximum decline of approximately 10% when the flow rate increases from 180 to 360 L h-1 and 38% when the cooling water temperature increases from 20~C to 40~C. When the inclination angle of MHPA-FPC ex- ceeds 30~, the slope change has a negligible effect on the heat transfer performance of MHPA-FPC. In addition, contact thermal resistance significantly affects the heat transfer capability of MHPA-FPC. The total thermal resistances lowers to nearly half of the original level when contact material between the condenser of MHPA and the heat exchanger changes from conductive silicone to conductive grease. These results could provide useful information for the optimal design and operation of MHPA-FPC.

Membraneless reproducible MoS2 field-effect transistor biosensor for high sensitive and selective detection of FGF21

Fibroblast growth factor 21(FGF21)serves as an essential biomarker for early detection and diagnosis of nonalcoholic fatty liver disease(NAFLD).It has received a great deal of attention recently in efforts to develop an accurate and effective method for detecting low levels of FGF21 in complex biological settings.Herein,we demonstrate a label-free,simple and high-sensitive field-effect transistor(FET)biosensor for FGF21 detection in a nonaqueous environment,directly utilizing two-dimensional molybdenum disulfide(MoS2)without additional absorption layers.By immobilizing anti-FGF21 on MoS2 surface,this biosensor can achieve the detection of trace FGF21 at less than 10 fg mL-1.High consistency and satisfactory reproducibility were demonstrated through multiple sets of parallel experiments for the MoS2 FETs.Furthermore,the biosensor has great sensitivity to detect the target FGF21 in complex serum samples,which demonstrates its great potential application in disease diagnosis of NAFLD.Overall,this study shows that thin-layered transition-metal dichalcogenides(TMDs)can be used as a potential alternative platform for developing novel electrical biosensors with high sensitivity and selectivity.

Numerical and Experimental Investigation on the Performance of Lean Burn Catalytic Combustion for Gas Turbine Application

This manuscript presents our numerical and experimental results regarding the performance characteristics of lean bum catalytic combustion for gas turbine application. The reactant transport was assumed to be controlled by both bulk diffusion as well as surface kinetics, implemented by means of an approximate reaction rate equation and empirical coefficients to incorporate reaction mechanism. Experimental and numerical results were compared to examine the effects of methane mole fraction, inlet temperature, operating pressure, velocity and hydrogen spe- cies on combustion intensity. The results indicate that inlet temperature is the most significant parameter that im- pacts operation of the catalytic combustor and the most effective methods for improving the methane conversion are increasing the inlet temperature and increasing the methane mole fraction. Simulations from ID heterogene- ous plug flow model can capture the trend of catalytic combustion and describe the behavior of the catalytic mo- nolith in detail. The addition of hydrogen will provide heat release by the exothermie combustion reaction so that the reactants reach a temperature at which methane oxidation can light-off.