Most Popular Books by Lin Wang

Xiaoxu quitte son bourg natal pour aller s''installer à Wuhan. Perdue dans cette grande ville et son agitation, elle se sent moins belle, moins douée, moins légitime que ses camarades de classe. Sa rencontre avec Yanhuan, la plus belle fille de l''école, et Lin''an, le brillant étudiant, va lui permettre de s''épanouir dans ce nouvel environnement, mais va également la confronter aux émois de l''adolescence...

The RAND Corporation launched the Gun Policy in America initiative in January 2016 with the goal of creating objective, factual resources for policymakers and the public on the effects of gun laws. The primary goal was to create resources where policymakers and the general public can access unbiased information that facilitates the development of fair and effective gun policies, and all resources are accessible on the project website. Responding to feedback from teachers and colleagues, RAND researchers developed a unit plan centered on those resources. The unit is designed to help high school educators and students-who are increasingly interested in joining the conversation about gun policy and mobilized to respond to gun violence-access the high-quality, evidence-based materials on the website. The researchers'' overarching goals in developing the unit are to guide students to understand existing research related to gun policy and deeply consider the complexity of gun policy-related issues. The lessons and activities engage students in critically reading and synthesizing research evidence and expert opinions, and the unit culminates in the students applying this information to present an argument for or against implementing a specific gun policy.

Wood-framed construction is one of the main building types for residential buildings in North America because of their features such as light-weight, easily built and environmental friendly. However, prolonged exposure to moisture during construction and in service is a durability concern for wood framed envelopes. As building energy consumption has gained increasing attention in recent years, the majority of building codes in North America require higher insulation levels in building envelopes to improve the building energy efficiency. However, the highly insulated wood framed envelopes may have higher risk of moisture problems such as mold growth and wood decay depending on their configurations. Hygrothermal simulation programs have been widely used for evaluating hygrothermal performance of wood framed envelopes. However, the uncertainties of the input parameters may result in a discrepancy between simulation results and the real performance of the wood framed envelopes, thereafter, unable to reveal the actual risks of moisture problems. Stochastic modelling has been used to investigate the uncertainties of the input parameters and their influence, however, the stochastic parameters were only limited to material properties and boundary conditions in previous studies without considering the moisture loads such as air leakage and rain leakage. This thesis focuses on developing a methodology to evaluate the hygrothermal performance of wood framed envelopes under various moisture loads using stochastic approach. A stochastic modelling framework is developed based on a well-developed hygrothermal simulation program- DELPHIN and a robust programming platform- MATLAB. Latin Hypercube Sampling technique and Factorial Design Experiment are combined to organize the stochastic material properties, boundary conditions and moisture loads, and generate stochastic models. Uncertainty and sensitivity analysis are performed based on the stochastic input parameters and results to evaluate the moisture content level and mold growth risk, as well as the sensitivity of the moisture performance to each influential factor. The developed stochastic modelling framework is applied to analyze the hygrothermal performance of Cross Laminated Timber (CLT) wall assemblies and compared with parametric study to demonstrate the advantages of stochastic approach. Then, the hygrothermal performance of the highly insulated wood framed walls (deep cavity walls and exterior insulated walls) are analyzed using the stochastic modelling framework. It is found that the exterior insulated walls have lower mold growth risk than deep cavity walls, and the wall with high permeance exterior insulation (mineral wool) is safer than that with low permeance exterior insulation (polyisocyanurate) in terms of mold growth. The moisture performance of the walls is more sensitive to moisture loads than to material properties, and the significance of the moisture loads (air leakage and rain leakage) depends on climate condition. The thresholds of air leakage rate and rain deposition factor are obtained for the highly insulated wood framed walls to avoid mold growth risk. The design guidelines are formulated for energy efficient and durable wood framed envelopes. The developed stochastic modelling framework can be also applied to other moisture damage risk analysis such as wood decay and the damage caused by freeze/thaw cycles.

The use of aplanatic solid immersion lenses (ASILs) made of high refractive index optical glasses provides a route to wide-field high-resolution optical microscopy. Structured illumination microscopy (SIM) can double the spatial bandwidth of a microscope to achieve high-resolution imaging. This research aims to investigate the combination of the ASILs and SIM in fluorescence microscopy, which we call structured illumination solid immersion fluorescence microscopy (SISIM), to pursue a microscopic system with very large numerical aperture and high lateral resolution. The first stage of the research shows the development of solid immersion fluorescence microscopy (SIF) employing an ASIL allows us to obtain a fluorescence microscope with effective numerical aperture of 1.85. The aberration issues, especially chromatic aberration, that need to be circumvented are analysed by both optical simulation and experimental verification. The near-field imaging property is also discussed and demonstrated. Then the SIM using a diffraction grating to generate structured illumination pattern via two-beam interference is developed. Finally, the SISIM system is constructed by combining the structured illumination with the SIF, and an effective numerical aperture of 3 has been obtained. Future developments of the SISIM system to make it achieve higher resolution and suit routine use are proposed. SISIM is a promising high-resolution microscopic technique with extensive potential applications in cell biology.