Stability Analysis of Continuous-Time Switched Systems with a Random Switching Signal

This paper is concerned with the stability analysis of continuous-time switched systems with a random switching signal. The switching signal manifests its characteristics with that the dwell time in each subsystem consists of a fixed part and a random part. The stochastic stability of such switched systems is studied using a Lyapunov approach. A necessary and sufficient condition is established in terms of linear matrix inequalities. The effect of the random switching signal on system stability is illustrated by a numerical example and the results coincide with our intuition.Comment: 6 pages, 6 figures, accepted by IEEE-TA

Continuous-wave and Transient Characteristics of Phosphorene Microwave Transistors

Few-layer phosphorene MOSFETs with 0.3-um-long gate and 15-nm-thick Al2O3 gate insulator was found to exhibit a forward-current cutoff frequency of 2 GHz and a maximum oscillation frequency of 8 GHz after de-embedding for the parasitic capacitance associated mainly with the relatively large probe pads. The gate lag and drain lag of the transistor was found to be on the order of 1 us or less, which is consistent with the lack of hysteresis, carrier freeze-out or persistent photoconductivity in DC characteristics. These results confirm that the phosphorene MOSFET can be a viable microwave transistor for both small-signal and large-signal applications.Comment: Accepted for oral presentation at IMS 201

The Hukou and Land Tenure Systems as Two Middle Income Traps—the Case of Modern China [post-print]

China’s prevailing hukou (household registration) system and land tenure system seem to be very different in their applications. In fact, they both function to deny the exit right of rural residents from a rural community. Under these systems, rural residents are not allowed to freely exit from collectives if they do not want to lose their entitlements, such as their rights to using collectively owned land and their land-based properties. Farmers are neither allowed to sell their houses to outsiders, nor allowed to sell to outsiders their rights to contracting a piece of land from the collective where their households are registered. For migrant workers from rural areas, it is extremely difficult for them to obtain an urban hukou with all its associated entitlements at an urban locality where they currently work and live. The combined effect of the two systems leads to serious distortions in labor and land markets, resulting in discrimination against migrant workers, sprawling yet exclusive urbanization, housing bubbles, and depressed domestic demand. These distortions further entrench the existing and much widened urban/rural divide. Unless these two systems are thoroughly reformed, the rural residents in Chinese mainland will be trapped in their comparatively much lower income and remain unable to share the gains from the agglomeration effects of urbanization

Which Type of Urbanization Better Matches China’s Factor Endowment: A Comparison of Population-intensive Old Puxi and Land-Capital-intensive New Pudong [post-print]

Based on a comparative study of New-Pudong (East Shanghai) and Old-Puxi (West Shanghai) in their respective ability to absorb rural migrants, the very essence of urbanization, this paper finds that, constrained by the current hukou (household registration) system and land tenure system, although New-Pudong has emerged as one of the most modernized urban areas in the world, it did so under an urbanization model that is government-dominant and characterized by high land-intensity and capital-intensity. This model represents a serious mismatch in terms of China’s factor endowment that is characterized with a large but relatively poor rural population. In sharp contrast, guided by the market mechanism under private land ownership and free migration, Old-Puxi emerged as an urbanization model that was very adaptable to China’s factor endowment and stage of development. Therefore, as a model of endogenous urbanization, Old-Puxi is more efficient and inclusive, at the same time more sustainable economically and environmentally, and for this reason more applicable to China at a time when China needs to urbanize most of its rural population urgently to avoid the further worsening of the rural/urban divide and income disparity

Do employees truly value their brand values? Examining the specificity of employee-brand value fit for service brands

The alignment between employee performance and brand values is crucial in realizing a differentiated and meaningful service brand. However, previous studies that examine this alignment tend to adopt only reflective measures that do not acknowledge the pluralistic nature of brand values. To fully demonstrate the specificity of employee-brand value fit, we proposed and tested a Multiple Indicators Multiple Causes (MIMIC) measurement model with both reflective indicators and formative indicators. This approach not only reveals a general employee-brand value fit level, but also yields insight with respect to what brand values are the most important in informing employee-brand value fit and their subsequent brand performance. Two empirical studies were conducted to test and re-test this new approach. Both studies strongly supported the superiority of this MIMIC model approach. With this statistical advancement, theoretical and managerial implications are provided accordingly