The air quality and the river water quality of the underlying surfaces in Shanghai and some areas of the Netherlands after environmental treatment were analyzed respectively, and the correlation between them was explo...The air quality and the river water quality of the underlying surfaces in Shanghai and some areas of the Netherlands after environmental treatment were analyzed respectively, and the correlation between them was explored. A long-term family experiment was carried out to figure out the causes of water turbidity, and the correlations of turbidity and pH in water with the PM2.5 index in air quality were probed. Then, the air quality was found to be correlated, to some extent, with the river water quality of underlying surfaces, in which the PM2.5 index was strongly correlated with the river water quality.展开更多
In this article, we will explore the applications of linear ordinary differential equations (linear ODEs) in Physics and other branches of mathematics, and dig into the matrix method for solving linear ODEs. Although ...In this article, we will explore the applications of linear ordinary differential equations (linear ODEs) in Physics and other branches of mathematics, and dig into the matrix method for solving linear ODEs. Although linear ODEs have a comparatively easy form, they are effective in solving certain physical and geometrical problems. We will begin by introducing fundamental knowledge in Linear Algebra and proving the existence and uniqueness of solution for ODEs. Then, we will concentrate on finding the solutions for ODEs and introducing the matrix method for solving linear ODEs. Eventually, we will apply the conclusions we’ve gathered from the previous parts into solving problems concerning Physics and differential curves. The matrix method is of great importance in doing higher dimensional computations, as it allows multiple variables to be calculated at the same time, thus reducing the complexity.展开更多
Unlike consumers in the mall or supermarkets, online consumers are “intangible” and their purchasing behaviors are affected by multiple factors, including product pricing, promotion and discounts, quality of product...Unlike consumers in the mall or supermarkets, online consumers are “intangible” and their purchasing behaviors are affected by multiple factors, including product pricing, promotion and discounts, quality of products and brands, and the platforms where they search for the product. In this research, I study the relationship between product sales and consumer characteristics, the relationship between product sales and product qualities, demand curve analysis, and the search friction effect for different platforms. I utilized data from a randomized field experiment involving more than 400 thousand customers and 30 thousand products on JD.com, one of the world’s largest online retailing platforms. There are two focuses of the research: 1) how different consumer characteristics affect sales;2) how to set price and possible search friction for different channels. I find that JD plus membership, education level and age have no significant relationship with product sales, and higher user level leads to higher sales. Sales are highly skewed, with very high numbers of products sold making up only a small percentage of the total. Consumers living in more industrialized cities have more purchasing power. Women and singles lead to higher spending. Also, the better the product performs, the more it sells. Moderate pricing can increase product sales. Based on the research results of search volume in different channels, it is suggested that it is better to focus on app sales. By knowing the results, producers can adjust target consumers for different products and do target advertisements in order to maximize the sales. Also, an appropriate price for a product is also crucial to a seller. By the way, knowing the search friction of different channels can help producers to rearrange platform layout so that search friction can be reduced and more potential deals may be made.展开更多
The problem that consumers often fail to read the standard form contracts they willingly enter into has been recognized by many scholars.This is a pressing issue because it may result in the consumers being disadvanta...The problem that consumers often fail to read the standard form contracts they willingly enter into has been recognized by many scholars.This is a pressing issue because it may result in the consumers being disadvantaged in bargains.Several laws have already been put in place to protect consumers,but the protection is often inadequate.This essay assesses how the current solutions are carried out and investigates whether new methods can be put in place.It argues that the key to dealing with the no-reading phenomenon is to make contracts more accessible to consumers so that they can be more inclined to guard their own interests.展开更多
文摘The air quality and the river water quality of the underlying surfaces in Shanghai and some areas of the Netherlands after environmental treatment were analyzed respectively, and the correlation between them was explored. A long-term family experiment was carried out to figure out the causes of water turbidity, and the correlations of turbidity and pH in water with the PM2.5 index in air quality were probed. Then, the air quality was found to be correlated, to some extent, with the river water quality of underlying surfaces, in which the PM2.5 index was strongly correlated with the river water quality.
文摘In this article, we will explore the applications of linear ordinary differential equations (linear ODEs) in Physics and other branches of mathematics, and dig into the matrix method for solving linear ODEs. Although linear ODEs have a comparatively easy form, they are effective in solving certain physical and geometrical problems. We will begin by introducing fundamental knowledge in Linear Algebra and proving the existence and uniqueness of solution for ODEs. Then, we will concentrate on finding the solutions for ODEs and introducing the matrix method for solving linear ODEs. Eventually, we will apply the conclusions we’ve gathered from the previous parts into solving problems concerning Physics and differential curves. The matrix method is of great importance in doing higher dimensional computations, as it allows multiple variables to be calculated at the same time, thus reducing the complexity.
文摘Unlike consumers in the mall or supermarkets, online consumers are “intangible” and their purchasing behaviors are affected by multiple factors, including product pricing, promotion and discounts, quality of products and brands, and the platforms where they search for the product. In this research, I study the relationship between product sales and consumer characteristics, the relationship between product sales and product qualities, demand curve analysis, and the search friction effect for different platforms. I utilized data from a randomized field experiment involving more than 400 thousand customers and 30 thousand products on JD.com, one of the world’s largest online retailing platforms. There are two focuses of the research: 1) how different consumer characteristics affect sales;2) how to set price and possible search friction for different channels. I find that JD plus membership, education level and age have no significant relationship with product sales, and higher user level leads to higher sales. Sales are highly skewed, with very high numbers of products sold making up only a small percentage of the total. Consumers living in more industrialized cities have more purchasing power. Women and singles lead to higher spending. Also, the better the product performs, the more it sells. Moderate pricing can increase product sales. Based on the research results of search volume in different channels, it is suggested that it is better to focus on app sales. By knowing the results, producers can adjust target consumers for different products and do target advertisements in order to maximize the sales. Also, an appropriate price for a product is also crucial to a seller. By the way, knowing the search friction of different channels can help producers to rearrange platform layout so that search friction can be reduced and more potential deals may be made.
文摘The problem that consumers often fail to read the standard form contracts they willingly enter into has been recognized by many scholars.This is a pressing issue because it may result in the consumers being disadvantaged in bargains.Several laws have already been put in place to protect consumers,but the protection is often inadequate.This essay assesses how the current solutions are carried out and investigates whether new methods can be put in place.It argues that the key to dealing with the no-reading phenomenon is to make contracts more accessible to consumers so that they can be more inclined to guard their own interests.
