Fluent数值模拟在制冷与空调领域中的应用

Fluent软件是流体力学中通用性较强的一种商业CFD软件,应用范围很广。主要介绍Fluent在制冷与空调中的应用。Fluent模拟适用于制冷领域等现代技术对过程模拟的要求,同时满足现代化生产设计,是制冷与空调设计的一个重要发展方向。阐述了Fluent模拟仿真在制冷领域的现状及发展概况;重点对Fluent在工艺过程中的模拟作了介绍。利用模型复现实际系统中发生的本质过程,并通过对系统模型的实验来研究存在的或设计中的系统。     

匀变速直线运动位移公式的应用

现职业院校的物理教材基本上是高中三年物理知识的浓缩,知识面跨度大,知识点讲解简单．理论知识强调“必须、够用”,这就给教学带来很大的难度．     

“电路与电子技术”的课程设计

本课程是在重点培养学生认知能力、应用能力和创新能力的前提下设计的,教学中结合学生的思维特点,充分发挥教师的主导和学生的主体作用,以理论认识、实际应用为主线,运用PPT、EWB仿真软件、网络资源等多种教学手段,把传授知识、培养兴趣、提高应用能力、渗透方法有机地结合到一起．     

Electric-dipole allowed （El） and forbidden （E2, M1 and M2） transition probabilities of 4f for N＋

By applying systematically enlarged multi-configuration Dirac-Fock wavefunction, the transitions for electricdipole allowed （E1） and forbidden （E2, M1 and M2） lines are studied among 4f pair coupling and low-lying configurations for singly ionized nitrogen. Most important effects of relativity, electron correlation, the rearrangement of electron density, Breit interaction, and quantum electrodynamic effects are included in the computation. Then, allowed （E1） and forbidden （E2, M1 and M2） transition probabilities of 4f for N＋ are obtained and compared with experimental results. Good agreement with available experimental results is found and most of the data of 4f are presented for the first time.     

Research on application of MOOC in optical packet switching

An experiment on receiving and identifying multiple optical orthogonal codes （MOOC） sequence-based optical labels in an optical packet switching （OPS） network is reported. Two groups of MOOC with a code length of 23 and a code weight of 3 are used to identify the optical labels. The scheme and principle of OPS networks based on MOOC sequence-based optical labels are presented. Because optical labels contain OPS and routing information, the importance of optical label processing with multiple inconsecutive, random, and burst optical labels in an OPS network is pointed out. Considering the MOOC-based optical labels, we design a circuit consisting of a broadened network and a cascaded amplifier to receive multiple groups of low-power narrow pulses （optical labels in the MOOC-OPS network） with a period of 2 ns. The successful experimental results demonstrate that the designed scheme is feasible.     

Focusing of Time Reversal Lamb Waves and Its Applications in Structural Health Monitoring

The focusing of time reversal acoustic fields for dispersive and multimodal Lamb waves is theoretically investigated and experimentally verified. It is demonstrated that the time reversal Lamb wave signal will reach the maximum amplitude when the observation point is located at the damage location. Based on the time reversal focusing theory, a damage imaging method is proposed for structural health monitoring using Lamb waves. The experiments employ a transducer network consisting of four piezoelectric transducers as actuators and as well sensors for excitation and measurement of Lamb waves. The results show that this method is able to accurately predict damage location and provides an estimation of the possible area even for damage close to one of the transducers or even slightly outside the transducer network.     

Rheological Behavior of Some Aqueous Gels of Carbopol with Pharmaceutical Applications

The concentration and temperature dependence of the viscosity is observed for some aqueous dispersions of Carbopol. The experimental data are analyzed with the power model, and reveal non-Newtonian behavior （shear thinning） of the samples.     

Design and Application of a Near Field Microwave Antenna for the Spin Control of Nitrogen-Vacancy Centers

Controlled manipulation of the electron spin by means of a microwave field is investigated. The near magnetic field generated by a copper wire antenna is measured experimentally and simulated theoretically, and the optimum antenna length and position are obtained. By measuring the change in the fluorescence of nitrogen-vacancy （N-V） centers in diamond after excitation with a 532 nm continuous wave laser at room temperature, it is verified that the spin of the N-V center can be effectively controlled by the microwave field.     

对话教学在物理复习课中的应用与思考

1 问题的提出 浙江省新一轮的课程改革到现在已经完成一个三年的轮回.在课改背景下高中物理习题课或复习课依然占有相当的份量,特别是进入高三后,会有长时间的复习教学;单一的教学形式使高三物理课堂教学效率越发低下,教学中在强化知识和技能的同时,三维教学目标的实现大打折扣.