This article uses new data to analyze whether the 1990s brought a change in terms of migrants' access to urban jobs. The November 1997 “Beijing Migrant Census” provides a unique data set that enables a quantitative assessment of non‐locally registered migrants' access to the formal sector, and more specifically to “white‐collar” occupations. The results show that a university degree and a nonagricultural registration status are both means of increasing access to employment in the formal sector. The “formal” sector is defined as employment with five types of large, relatively stable employers — government organizations, state‐owned enterprises, joint ventures, shareholding enterprises, and enterprises owned/invested in by foreign, Hong Kong, or Taiwanese capital (San Zi). White collar jobs, in particular, are only available to migrants with a university degree, with hukou status having a limited relative effect. This article shows that qualified migrants are penetrating the formal job market while the majority of migrants are still taking low level jobs in the informal sector. This dichotomy represents a recent change that could reflect a new stream of migrants and/or more open urban employment. At the same time, the continuing segregation or marginalization of most migrants is clearly evident from the data.

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Theoretical analysis in this paper indicates that the accuracy of a silicon piezoresistive pressure sensor is mainly affected by thermal drift, and varies nonlinearly with the temperature. Here, a smart temperature compensation system to reduce its effect on accuracy is proposed. Firstly, an effective conditioning circuit for signal processing and data acquisition is designed. The hardware to implement the system is fabricated. Then, a program is developed on LabVIEW which incorporates an extreme learning machine (ELM) as the calibration algorithm for the pressure drift. The implementation of the algorithm was ported to a micro-control unit (MCU) after calibration in the computer. Practical pressure measurement experiments are carried out to verify the system's performance. The temperature compensation is solved in the interval from −40 to 85 °C. The compensated sensor is aimed at providing pressure measurement in oil-gas pipelines. Compared with other algorithms, ELM acquires higher accuracy and is more suitable for batch compensation because of its higher generalization and faster learning speed. The accuracy, linearity, zero temperature coefficient and sensitivity temperature coefficient of the tested sensor are 2.57% FS, 2.49% FS, 8.1 × 10−5/°C and 29.5 × 10−5/°C before compensation, and are improved to 0.13%FS, 0.15%FS, 1.17 × 10−5/°C and 2.1 × 10−5/°C respectively, after compensation. The experimental results demonstrate that the proposed system is valid for the temperature compensation and high accuracy requirement of the sensor.

Data from a 1998 migration survey in Hubei province are used to examine gender differences in the determinants of temporary labor migration from a multi-level perspective. The authors find that community level factors play a key role in temporary labor migration; models omitting community level variables are poor in predicting temporary labor migration. Significant gender differences exist in determinants of temporary labor migration. For men, temporary labor migration is mainly a response to community level factors; individual or household characteristics have little predictive power. For women, by contrast, temporary labor migration is predominantly determined by individual characteristics; community level factors are not as important.

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Using data from the 1996 and 2001 censuses of Australia, this study provides a detailed description of the diverse patterns of occupational concentration and mobility of selected Asian immigrant groups. The study shows that Asian-Australians include not only groups which remain relatively concentrated in “low-end” occupations, but also many others which are more likely than the Australia-born to be in “high-end” professional occupations, and that almost all the selected groups experienced some degree of upwards occupational mobility between 1996 and 2001. However, after controlling for a range of demographic and human capital characteristics, the participation of most groups in the managerial and professional occupations is shown to be below that for the Australia-born. Hence, the high occupational status of most Asian groups does not mean they are advantaged.

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Since the inauguration of reform in 1978, a large number of Chinese peasants were released from agricultural production and became “surplus labor.” Because a large proportion of rural-urban population mobility assumes the form of temporary movement, attention to such movement is therefore essential to any assessment of social, economic and political changes in urban and rural China and of the overall urbanization process. The present study uses the 1 percent sample of the 1990 census data of China to study long-term rural to urban temporary economic migrants, the provincial pattern and variation of these migrants, and their economic activities represented by the occupational attainments in cities in comparison with urban residents.