Publications by authors named "Shipeng Han"

is a major migratory invasive pest and is of global concern. Vitellogenesis, a crucial process for population multiplication in oviparous insects, is regulated by endocrine hormones. In this study, three primary responders to JH signaling, the JH receptor gene , and the downstream transcription factor and , were first cloned and identified.

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Small-scale pedestrian detection is one of the challenges in general object detection. Factors such as complex backgrounds, long distances, and low-light conditions make the image features of small-scale pedestrians less distinct, further increasing the difficulty of detection. To address these challenges, an Enhanced Feature-Fusion YOLO network (EFF-YOLO) for small-scale pedestrian detection is proposed.

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  • Accurate segmentation of thyroid nodules in ultrasound images is essential for diagnosing thyroid cancer, but it's difficult due to factors like irregular shapes and blurred edges.
  • The study introduces an innovative dual-branch network called MRDB, which combines elements from Mamba and ResNet-34 to enhance feature extraction and detail reconstruction in ultrasound images.
  • Experimental results show that MRDB significantly outperforms existing methods, achieving a DSC score of 90.02% on the TN3K dataset and improving performance by 10.8% on external datasets, indicating its effectiveness and potential use in clinical settings.
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  • Intestinal symbiotic bacteria have evolved alongside certain insects, significantly impacting their growth and adaptation.
  • J. E. Smith, a major invasive pest, threatens over 350 plant species and food security, highlighting the importance of understanding its gut bacteria.
  • Analysis of gut bacteria revealed that diet affects bacterial diversity, with rice-based diets promoting the highest diversity and honeysuckle flowers the lowest; dominant bacterial groups included Firmicutes, Actinobacteriota, and Proteobacteria.
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Dioscorea oppositifolia Thunb. (Chinese yam) is one of the traditional foods and medicinal plants in China. It has nutritional and medicinal value and plays an important role in treatment of diabetes and hypertension.

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The fall armyworm is a highly polyphagous invasive pest. The strong reproductive capacity is an important factor in the rapid colonization and expansion of Vitellogenin (Vg) and vitellogenin receptor (VgR) play important roles in insect reproduction. As the precursor of vitellin (Vn), Vg provides essential nutrition for embryonic development, and VgR mediates the uptake of Vg by oocytes.

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  • The seven-spot ladybird beetle (Coccinella septempunctata) is an important natural predator of aphids, but its offspring are adversely affected by the neonicotinoid insecticide thiamethoxam.
  • Research found that exposure to sublethal doses of thiamethoxam prolonged the development and reproductive periods of the ladybird beetle, while decreasing its overall fecundity and longevity over generations.
  • The study highlighted that the sublethal effects of thiamethoxam significantly reduced population growth parameters and predation efficiency in the ladybird beetle, indicating broader ecological concerns.
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Juvenile hormone (JH) plays a key role in regulating insect reproductive processes. Methoprene-tolerant (Met), as a putative JH receptor, transduces JH signals by activating the transcription factor krüppel homolog 1 (Kr-h1). To understand the effects of Met and Kr-h1 genes on female reproduction of natural enemy insects, the Met and Kr-h1 were identified and analyzed from Harmonia axyridis Pallas (HmMet and HmKr-h1).

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  • The seven-spot ladybird beetle is a key biological control agent against aphids and two strains (thiamethoxam-resistant and susceptible) were studied for gene expression differences.
  • A total of 1798 differentially expressed genes were identified between the resistant and susceptible strains, with 560 up-regulated and 1238 down-regulated genes.
  • Key findings include the up-regulation of cytochrome P450 monooxygenases and other detoxifying enzymes in the resistant strain, while a gene related to nicotinic acetylcholine receptors was down-regulated.
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Vitellogenin receptors (VgRs) have vital roles in reproduction by mediating endocytosis of the vitellogenin (Vg) in oviparous insects. Same as most insect species that possess only one VgR, in this study, a single VgR mRNA (HmVgR) was identified in an important natural enemy ladybeetle, Harmonia axyridis (Pallas). The open reading frame of HmVgR was 5,340 bases encoding a protein of 1,779 amino acids.

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As an accurate and convenient technique, the qRT-PCR is always used in the quantitative expression analysis of functional genes. Normalization of the data relies on stable reference genes. The fall armyworm (J.

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Angelica dahurica (Fisch. ex Hoffm.) is an abundantly cultivated Chinese herbal medicine plant in China with about 4000 hectares grown, the annual production is up to 24,000 tons.

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  • MEMS inertial measurement units (IMUs) are crucial for navigation systems but are prone to various types of noise and errors affecting their accuracy.
  • Researchers focused on improving the performance of MEMS gyroscopes by using four hybrid recurrent neural networks (RNNs) for noise reduction: LSTM-LSTM, GRU-GRU, LSTM-GRU, and GRU-LSTM.
  • In experiments, while GRU-LSTM showed overfitting, LSTM-GRU excelled in reducing noise in the x and y axes with over 90% improvement, and LSTM-LSTM proved better in terms of zero bias stability compared to GRU networks.
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Research and industrial studies have indicated that small size, low cost, high precision, and ease of integration are vital features that characterize microelectromechanical systems (MEMS) inertial sensors for mass production and diverse applications. In recent times, sensors like MEMS accelerometers and MEMS gyroscopes have been sought in an increased application range such as medical devices for health care to defense and military weapons. An important limitation of MEMS inertial sensors is repeatedly documented as the ease of being influenced by environmental noise from random sources, along with mechanical and electronic artifacts in the underlying systems, and other random noise.

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Success of the da Vinci surgical robot in the last decade has motivated the development of flexible access robots to assist clinical experts during single-port interventions of core intrabody organs. Prototypes of flexible robots have been proposed to enhance surgical tasks, such as suturing, tumor resection, and radiosurgery in human abdominal areas; nonetheless, precise constraint control models are still needed for flexible pathway navigation. In this paper, the design of a flexible snake-like robot is presented, along with the constraints model that was proposed for kinematics and dynamics control, motion trajectory planning, and obstacle avoidance during motion.

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In the last half decade, nearly 31% of annual global deaths are linked to cardiovascular diseases. Thus, robotic catheterizations are recently proposed for interventions of conditions such as aneurism or atherosclerosis formed along vascular paths leading to the heart. However, existence of mild to strong hysteresis while navigating unactuated catheters with the current robotic systems inhibits autonomous control for vascular surgery.

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Recently, snake-like robots are proposed to assist experts during medical procedures on internal organs via natural orifices. Despite their well-spelt advantages, applications in radiosurgery is still hindered by absence of suitable designs required for spatial navigations within clustered and confined parts of human body, and inexistence of precise and fast inverse kinematics (IK) models. In this study, a deeply-learnt damped least squares method is proposed for solving IK of spatial snake-like robot.

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Snake robots can be used to assist experts during surgical operations on internal organs via natural orifices. However, real-time control of such robot in Mater Slave (MS) teleoperation is a major challenge. Inverse kinematics solution of snake robots has being a key challenge towards real time control especially if the robot is hyper-redundant.

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Background: Snake-like robot is an emerging form of serial-link manipulator with the morphologic design of biological snakes. The redundant robot can be used to assist medical experts in accessing internal organs with minimal or no invasion. Several snake-like robotic designs have been proposed for minimal invasive surgery, however, the few that were developed are yet to be fully explored for clinical procedures.

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