Giffen Paradox and Industrial Development: A Case Study of Family Service Industry in Beijing

As a core feature of high-end CNC machine tools, the torque carrying performance of five-axis milling head directly affects the machining accuracy and reliability. Through theoretical analysis and derivation, combining experimental prototype, the A/C-axis cutting torque formula of five-axis milling head on woodworking is obtained. The reliability analysis provides a theoretical basis for drive motor selection and five-axis milling head structural optimization and improvement.

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“…4. The relationships of , , , , , and , , can be obtained by rotating matrix homogeneous transformation [6] .…”

Section: Reliability Analysis Of Cutting Torquementioning

confidence: 99%

Reliability Analysis about A/C-Axis of Woodworking Five-Axis Milling Head

Wang

Zhang

et al. 2014

AMM

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“…Based on governmental policies related to the nighttime economy, scholars have investigated the evolutionary mechanisms of these policies [5], and urban management planning for nighttime [6]. The study of the night economy is no longer confined to British cities [7]. Currently, the term "nighttime economy" primarily refers to economic activities predominantly centered on the service sector, occurring in urban spaces during the nighttime [3].…”

Section: Introductionmentioning

confidence: 99%

Research on Temporal and Spatial Distribution Pattern of the Night-Time Economy Supported by Multi-Source Data—A Case Study of Xiamen City, Fujian Province, China

Zeng,

Liu,

et al. 2024

Remote Sensing

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The increasing proportion of night consumption in the total daily consumption means the night economy has become an indispensable part of national economic development. However, early social science research on alcohol in the night economy and social science research on the night leisure industry dominated our understanding of the night city. Few researchers have built effective mathematical statistical models to explore the spatio-temporal distribution and regional interactions of the night economy. This paper presents a method to analyze the spatial and temporal distribution pattern of the night economy based on multi-source data. Firstly, K-Means++ and DBSCAN were used to cluster OD points to identify the gathering areas of night activities. Then, the local L-function in “flow space” was used to extract the aggregated flow of each aggregation area and analyze the regional interactions. Finally, the correlation between night activity and night service facilities was calculated by using geographic detector, and night activity and lighting were coupled by the profit and loss value. The research shows that this method can identify the main areas of night activity, dig out the interrelationships at the community level, and find the new night activity gathering points and night economic growth areas in the future. This study extends the current situation that the night economy is limited to theoretical research and research in central urban areas, provides the temporal and spatial distribution of night activities and night lighting supplies from the perspective of big data, and provides a basis for future night economy research, urban planning, and relevant policy issuance.

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“…Resin anchored bolts gradually replaced other kinds of bolts, and became the dominant style of bolt support because of its advantages of large anchor capacity, high reliability, strong adaptability, low cost and etc. The resin capsules have gone through nearly half a century's history as support materials in resin bolt support system [1][2][3]. West Germany was the first to begin to make development of the resin anchored bolt in 1958, and then the United States, France, Britain, Australia gradually began research on bolting technology [4][5].…”

Section: Introductionmentioning

confidence: 99%

Application and Development of Resin Capsules in Chinese Coal Mines

2014

AMR

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Development and application of resin capsules in Chinese coal mines were introduced in this paper, including the category, feature, applicability and basic parameters. The paper pointed out that unsaturated polyester resin capsules were the most widely used in Chinese coal mines. A kind of newly-developed low-viscosity resin capsule was applied to industrial test in Fengshuigou Colliery, and the results showed that the high pre-stress and intensive bolting system could effectively control the violent displacements of the surrounding rock, and it provided an effective approach for the support of soft rock roadway. Finally the future developments of resin capsules were prospected.

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Giffen Paradox and Industrial Development: A Case Study of Family Service Industry in Beijing

Cited by 6 publications

References 12 publications

Reliability Analysis about A/C-Axis of Woodworking Five-Axis Milling Head

Reliability Analysis about A/C-Axis of Woodworking Five-Axis Milling Head

Research on Temporal and Spatial Distribution Pattern of the Night-Time Economy Supported by Multi-Source Data—A Case Study of Xiamen City, Fujian Province, China

Application and Development of Resin Capsules in Chinese Coal Mines

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