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Article
Publication date: 9 August 2022

Huaiyu Wang, Xi Hu, Shuangquan Yang and Guoquan Xu

The study aims to examine the impact of farmers’ actual adaptations on rice yields in the upland areas of Yunnan province, China.

297

Abstract

Purpose

The study aims to examine the impact of farmers’ actual adaptations on rice yields in the upland areas of Yunnan province, China.

Design/methodology/approach

The paper employs the simultaneous equations model with endogenous switching to investigate the different effects of adaptation strategies on rice yields achieved by adopters and nonadopters based on the cross-sectional data at farm level.

Findings

The results show that farmers’ access to government agricultural extension services significantly encourages rice farmers to make the adjustments in farm managements. The authors find that the adaptation strategies employed by farmers significantly increase rice yields. Adaptations adopted by upland farmers increase rice yields for both adopters and nonadopters, particularly for the nonadopters.

Originality/value

This paper contributes to the existing literature by focusing on farmers’ adaptation strategies to climate change in uplands of Yunnan using the primary household survey data. The results show the effectiveness of farmers’ adaptation adoptions on rice yields in uplands of Yunnan province.

Details

China Agricultural Economic Review, vol. 14 no. 4
Type: Research Article
ISSN: 1756-137X

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Article
Publication date: 31 December 2024

Xinhui He, Kun Huang, Guihao Ran, Xiaobiao Mao, Qin Hu, Zhennan Lin, Shuangquan Ran and Tao Hu

This study aims to improve the sensitivity of magnetic detection. In this article, a multi-frequency modulation technique is used to increase the magnetic detection sensitivity of…

41

Abstract

Purpose

This study aims to improve the sensitivity of magnetic detection. In this article, a multi-frequency modulation technique is used to increase the magnetic detection sensitivity of diamond nitrogen vacancy (NV) centers sensors.

Design/methodology/approach

In the field of magnetic detection, NV centers have corresponding advantages due to their unique long coherence property at room temperature. The important indicators for NV centers magnetometers are the magnetic detection sensitivity of the NV centers and the integration of the magnetometer. To solve this problem, the authors propose a multi-frequency modulated magnetic detection technique, using an integrated probe as well as a lock-in amplifier for the double enhancement of sensitivity as well as integration.

Findings

The following results can be obtained by processing and calculating the experimental data with an integrated lock-in amplifier circuit with an area of 27.50 cm2 and a probe volume of 3.12 cm3. The multi-frequency modulation technique was used to increase the magnetic detection sensitivity of the NV centers from 8.59 nT/Hz1 / 2–2.42 nT/Hz1 / 2.

Research limitations/implications

The authors propose a signal modulation technique with an integrated design, which achieves an improvement in the sensitivity of the sensor’s magnetic detection through practical testing.

Originality/value

The authors propose a signal modulation technique with an integrated design, which achieves an improvement in the sensitivity of the sensor’s magnetic detection through practical testing. This technique provides new research solution for the subsequent improvement of the magnetic detection sensitivity.

Details

Sensor Review, vol. 45 no. 2
Type: Research Article
ISSN: 0260-2288

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