Cleaning is one of the most important steps in the harvesting process, and the prolonged and high-load operation of the vibrating sieve can decrease its reliability. To uncover the structural flaws of the cleaning sieve in the crawler combine harvester and establish a foundation for quality inspection, this paper proposes a method for durability testing and analysis using vibration and strain signals. Via the modal analysis of the cleaning sieve, the most susceptible areas for fault signals are identified. Subsequently, a specialized test rig exclusively designed for the examination of the durability of the cleaning sieve is constructed. After following 96 h of uninterrupted operation, the vibration plate of the cleaning sieve sustains damage, resulting in atypical noise. A signal analysis reveals that the primary vibration signal of the cleaning sieve primarily consists of a fundamental frequency of 5 Hz, corresponding to the driving speed, as well as a frequency doubling signal of 50 Hz. After the occurrence of damage, the peak amplitude of the received vibration signal increases by over 86.3%. Furthermore, the strain gauge sensor situated on the support plate of the rear sieve detects anomalous signals with frequencies exceeding 300 Hz, which are accompanied by a considerable rise in the power spectral density. This research has significant importance for enhancing the service life of the cleaning sieve and optimizing the overall machine efficiency.

Potatoes are a staple food in many countries due to their rich nutritional content, including vitamins and carbohydrates, leading to their widespread cultivation globally. As China ranks first in the world in potato cultivation area and yield, making the crop vital to national food security, mechanized harvesting has become an indispensable solution for the sustainable development of the potato industry. This paper analyzes key technologies in potato mechanized harvesting, including efficient vine removal, low-loss and obstruction-reduced digging, high-efficiency cleaning and separation, and intelligent harvesting, based on an overview of China's potato cultivation modes, mechanized harvesting methods and equipment. Furthermore, the study identifies gaps between Chinese potato harvesting equipment and that of European and American countries in terms of harvesting performance, intelligence level, and adaptability. Key challenges are also highlighted, such as significant regional variability, the lack of high-efficiency and low-loss separation devices, and difficulties in overcoming critical "chokepoint" technologies. Finally, the paper proposes future development directions for China's potato harvesting equipment, emphasizing 1) synergistic multi-mode development, 2) research on flexible and low-loss separation devices, and 3) the integration of intelligent technologies. This study aims to provide references for key technologies and optimized design solutions, supporting the advancement of mechanized potato harvesting and promoting sustainable and efficient practices in the potato industry.

To improve the poor adaptability of the cyclone cleaning and separation cylinder under different rice varieties, feed quantity, and operating conditions, this study proposed an automatically adjustment method for operational parameters. Multiple sensors were integrated into the system, and a fuzzy adaptive control strategy was adopted. The field harvest experiments results showed that the impurity content is about 2.30%, and the loss rate is about 1.01%. The test results indicated that the adaptive control system can dynamically adjust the rotational speed of the suction fan to solve the problem of the contradiction between loss rate and impurity content.

Background: Multiple countries' experiences have illustrated that integrated care is an ideal choice regarding improving the quality of health care. In China, the central government has enacted a large number of policies to promote the development of integrated care in recent years. Yet, no existing research has examined how these policies to support the development of integrated care. In this paper we seek to address that gap. Methods: Document content analysis method was used in this paper. Data were collected by carrying out a review of integrated care policies (N=21) published from January 2015 to December 2020. The policy documents of integrated care issued by central governments are retrieved through the Internet. IHSDNSs (Integrated Health Service Delivery Networks)’s essential attributes framework was used to guide data analysis. Results: The most commonly referenced principal domains of integrated care in China were model of care, there were 45 references to the organization and management, financial allocation and incentives was the least often referenced source of information. The main purpose of reference to information was to support the reform of integrated care decision-making. Conclusions: A whole range of policies on integrated care were issued in a relatively short time. These policies propose a macro conceptual and operational framework for the development of integrated care. The development of integrated care has been mainly driven by the policy stimulus in China. However, the concrete measures still need clear negotiation and management by the local municipalities. Future policy should improve complementary policies such as financial allocation and financial incentive policy.