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Development of the electric automatic steering system for agricultural vehicles

International Journal of Agricultural and Biological Engineering 2024年第1期17卷 209-214页

作者： Guangshun An Chong Yu juan Du Xiang Yin Youliang Ni Chengqian Jin School of Agricultural Engineering and Food Science Shandong University of TechnologyZibo 255000ShandongChina Nanjing Research Institute for Agricultural Mechanization of Ministry of Agriculture and Rural Affairs Nanjing 210014China

Automatic guidance of agricultural vehicles requires automatic execution of operation commands received from the navigation controller by using electronically controlled mechanisms for wheel steering,speed changing and work *** steering contributes as a prerequisite technique in automatic and semi-automatic agricultural *** research aimed to develop an electric automatic steering system that was compact in its structure and integrated into original steering mechanism in a simply and convenient way for aftermarket modification.A brushless motor and reducer assembly was utilized to provide an adequate steering torque instead of manual maneuver.A rapid assembling approach was proposed by passing the steering shaft through the hollow output shaft.A digital proportional-integral-differential(PID)algorithm was implemented to calculate the rotation speeds and directions by comparing the desired angle and the actual angle,which was implemented in a printed circuit board with a microcontroller unit(MCU)and interface *** unmanned wheeled tractor was applied as test platform to integrate the newly developed electric automatic steering *** were conducted to evaluate its performance in terms of stability and *** autonomous navigation system guided the tractor along target paths in the field by sending steering commands to the electric automatic steering *** results show that the steering angle error was less than 0.81°when desired steering angle was less than 10°.The lateral error difference was no more than 4.76 cm when repeating following the same target path,which indicated that the electric automatic steering system responded accurately and robustly to steering commands.

关键词： automatic steering automatic navigation agricultural vehicles

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Carbon preservation in sedimentary deposits: Beyond mineral protection

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The Innovation 2024年第2期5卷 5-6页

作者： Yunpeng Zhao juan Jia Chengzhu Liu Xiaojuan Feng State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China China National Botanical Garden Beijing 100093China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

The deposition and preservation of organic carbon(OC)in sedimentary environments(including soils and sediments)play major roles in mediating the global carbon *** than 90%of OC burial in the ocean occurs in continental margin sediments,which contributes to the evolution of the Earth’s atmosphere,such as oxygen content,over geological timescales.1 However,how OC escapes mineralization and persists in such sedimentary deposits has long been a *** protection through physicochemical associations of organic matter with minerals and cations is considered to be one of the primary mechanisms contributing to the environmental persistence of sedimentary OC.

关键词： sedimentary mineralization environments

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The guest CH_(3)CN molecule triggers solid-state photochromism in a Cu_(2)I_(2)-based MOF for advanced time-dependent encryption and inkless erasable printing

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Chinese Chemical Letters 2024年第3期35卷 532-537页

作者： Meng-juan Wang Bo Li Yong-Li Wei Shu-Na Zhao Shuang-Quan Zang Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis Centerand College of ChemistryZhengzhou UniversityZhengzhou 450001China College of Chemistry and Pharmaceutical Engineering Nanyang Normal UniversityNanyang 473061China

It remains a big challenge to develop solid-state stimuli-responsive materials for time-dependent information encryption and inkless erasable printing with long retention ***,a 2D Cu_(2)I_(2)-based MOF with photoresponsive spiropyran(SP)groups orderly installed on its skeleton is *** structural isomerization from SP to colored merocyanine(MC)form can be triggered by removing the CH_(3)CN ***,the degree of structural isomerization and the retention time can be adjusted by controlling the amount of CH_(3)CN guests,exhibiting dynamic photochromic behavior with multicolor states and tunable retention *** on these advantages,time-dependent information encryption is successfully ***,the long retention time(>72 h)of the MC form under daylight conditions in the CH_(3)CN-removed Cu_(2)I_(2)-based MOF and good repeatability make it promising in various applications,such as temporary calendars,price-cards,billboards,and reusable identity *** work provides a novel design strategy to fabricate multi-functional MOF-based smart materials for challenging applications of time-dependent information encryption and inkless erasable printing.

关键词： Stimuli-responsive materials Spiropyran Solid-state photochromism Time-dependent encryption Inkless erasable printing

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The biological functions and metabolic pathways of valine in swine

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Journal of Animal Science and Biotechnology 2024年第1期15卷 20-34页

作者： Chuni Wang Yao Peng Yiru Zhang juan Xu Sheng Jiang Leli Wang Yulong Yin Institute of Subtropical Agriculture Chinese Academy of SciencesChangshaChina Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation College of Life SciencesHunan Normal UniversityChangshaChina Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjinChina

Valine is an essential amino acid and a type of branched-chain amino acid. Due to the involvement of branchedchain amino acids in various metabolic pathways, there has been a surge of interests in valine nutrition and its role in animal physiology. In pigs, the interactions between valine and other branched-chain amino acids or aromatic amino acids are complex. In this review, we delve into the interaction mechanism, metabolic pathways, and biological functions of valine. Appropriate valine supplementation not only enhances growth and reproductive performances, but also modulates gut microbiota and immune functions. Based on past observations and interpretations, we provide recommended feed levels of valine for weaned piglets, growing pigs, gilts, lactating sows, barrows and entire males. The summarized valine nutrient requirements for pigs at different stages offer valuable insights for future research and practical applications in animal husbandry.

关键词： Additional dosage Biological function Metabolic pathway Pig Valine

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Early Triassic Volcanic Rocks in the Western Yarlung Zangbo Suture Zone:Implications for the Opening of the Neo-Tethys Ocean

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 324-336页

作者： HE juan LI Yalin HOU Yunling ZHOU Aorigele WEI Yushuai CHEN Xi DAI Jingen School of Civil Engineering and Architecture West Yunnan University of Applied SciencesDaliYunnan 671006China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100080China West Yunnan University of Applied Sciences DaliYunnan 671006China MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100080China

In this study,zircon U-Pb dating of volcanic rocks from the Zhongba ophiolite of the Yarlung Zangbo Suture Zone(YZSZ)in southern Xizang(Tibet)yielded an age of 247±3 *** to whole rock geochemical and Sr-NdPb isotopic data,the Early Triassic samples could be divided into two groups:Group 1 with P-MORB affinity,showing initial^(87)Sr/^(86)Sr ratios of 0.70253–0.70602,ε_(Nd)(t)values of 4.2–5.3,(^(206)Pb/^(204)Pb)_(t)ratios of 16.353–18.222,(^(207)Pb/^(204)Pb)_(t)ratios of 15.454–15.564,and(^(208)Pb/^(204)Pb)_(t)ratios of 35.665–38.136;Group 2 with OIB affinity,showing initial^(87)Sr/^(86)Sr ratios of 0.70249–0.70513,ε_(Nd)(t)values of 4.4–4.9,(^(206)Pb/^(204)Pb)_(t)ratios of 17.140–18.328,(^(207)Pb/^(204)Pb)_(t)ratios of 15.491–15.575,and(^(208)Pb/^(204)Pb)_(t)ratios of 36.051–*** 2 rocks formed by partial melting of the mantle source enriched by a former plume,and assimilated continental crustal material during melt *** formation of Group 1 rocks corresponds to the mixing of OIB melts,with the same components as Group 2 and *** Zhongba Early Triassic rocks belong to the continental margin type ophiolite and formed in the continental–oceanic transition zone during the initial opening of the Neo-Tethys in southern Xizang(Tibet).

关键词： rift Early Triassic magmatism Yarlung Zangbo Suture Zone Neo-Tethys Southern Xizang Tibet

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Development and Catalytic Cracking Performance of Ultrastable Y Zeolite Rich in Secondary Pores

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China Petroleum Processing & Petrochemical Technology 2024年第2期26卷 13-21页

作者： Li Jiaxing Wang Shengji Sha Hao Wang juan Zhou Lingping Wang Lixia SINOPEC Research Institute of Petroleum Processing Co. LtdBeijing 100083China Catalyst Co. Ltd.Qilu BranchSINOPECZibo 255336China

A novel ultra-stable zeolite, NSZ, rich in secondary pores was developed through the combination of gas-phase andmild hydrothermal methods. This zeolite was successfully tested in an industrial setting for the first time in the world. The porestructure characteristics of the NSZ zeolite prepared for industrial use were analyzed and characterized using BET. The resultsindicate a significant increase in the secondary pore volume of NSZ zeolite compared to the existing ultra-stable zeolite HSZ-5, which is produced through a conventional gas-phase method. The average secondary pore volume to total pore volume ratioin NSZ zeolite was found to be 58.96% higher. The catalytic cracking performance of NSZ zeolite was evaluated. The resultsshowed that the NSC-LTA catalyst, with NSZ as the active component, outperformed the HSC-LTA catalyst with HSZ-5 zeolitein terms of obtaining more high-value products (gasoline and liquefied petroleum gas) during the hydrogenated light cycle oilprocessing. Additionally, the NSC-LTA catalyst showed a significant improvement in coke selectivity.

关键词： gas-phase ultra-stable zeolite catalyst catalytic cracking

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Robot-assisted treatment of secondary epilepsy caused by parasitic infection:a case report

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癫痫学报（英文） 2024年第2期7卷 143-150页

作者： juan Luo Xin Chen Sixun Yu Haifeng Shu Department of Neurosurgery Affiliated Hospital of Southwest Medical UniversityLuzhou Sichuan 646000China Department of Neurosurgery General Hospital of the Western Theater Command of the PLAChengdu Sichuan 610083China Department of Neurosurgery General Hospital of the Western Theater Command of the PLAChengdu Sichuan 610083China

Background Cerebral sparganosis represents the most severe manifestation of sparganosis,with a relatively low global *** cases of secondary epileptic seizures caused by sparganosis infection in the functional areas of the brain,what advanced neurosurgical techniques should be employed to precisely identify and excise the epi-leptic lesions in the deep functional areas of the brain,aiming to achieve maximal removal while minimising the risk of neurological deficits?This remains a current challenge for epilepsy surgeons.Case presentation A 24-year-old Chinese male was admitted to our hospital,presenting with a history of left limb twitching persisting for over a *** main clinical symptoms presented twitching and numbness of his left limb without loss of *** the premise of inappropriate anti-seizure treatment,recurrent epilepsy attacked *** patient's diagnosis was considered as"space-occupying lesions in the several lobes of brain,secondary epilepsy"after comprehensive assessment and *** experts considered that the patient's space-occupying lesions in the right frontal and parietal lobes were highly suspected to be infected by *** report delved into the application of neurosurgery robot-assisted frameless stereotaxic technology and intraopera-tive stereotactic electroencephalography(SEEG)monitoring technology to accurately locate and optimize removal of parasite-related epileptic lesions situated in functional areas of the *** a result,the patient had achieved seizure freedom,leaving no symptoms of neurological deficit.Conclusions With the highly integrated development of imaging technology,mechanical technology,computer control technology,and artificial intelligence,surgical robots are poised to play a larger role across various neurosur-gical specialties in the *** benefits for patients and the promising application of this technology,its utilization holds significant value.

关键词： Cerebral sparganosis Secondary epilepsy Robot Frameless stereotaxic technology

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A Study on Idea Adoption Prediction Model Based on SMOTE-AdaBoost: Taking Salesforce Platform as an Example

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Journal of Systems Science and Information 2024年第4期12卷 476-490页

作者： Yunjiang XI Futao HUANG Lu HUANG Xiao LIAO juan YU School of Business Administration South China University of Technology School of Internet Finance and Information Engineering Guangdong University of Finance School of Economics and Management Fuzhou University

In the context of information overload, companies often struggle to effectively identify valuable ideas on their open innovation platforms. In this article, we propose an idea adoption strategy based on machine learning. We used data from a well-known open innovation platform, Salesforce, and extracted characteristic variables using the Information Adoption Model. Four classification models were then constructed based on AdaBoost, Random Forest, SVM and Logistic Regression models. Due to significant differences in the number of positive and negative samples in the OIP, we used the SMOTE method to address the problem of data imbalance. The results of the study showed that the ensemble learning models were more accurate in identifying valuable ideas than the individual machine learning models. When comparing the two ensemble learning models, AdaBoost outperformed Random Forest in predicting both positive and negative class samples. The SMOTE-AdaBoost model achieved a recall of 0.93, a precision of 0.92 and an impressive AUC of 0.98 in identifying adopted ideas, which could well identify valuable ideas and has implications for improving the efficiency and quality of idea adoption in OIP. The shortcoming of this work is that it only investigated a single platform. In the future, we will consider extending this method to different platforms and multiple classification problems.

关键词： open innovation platform AdaBoost information adoption ensemble learning

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Perspective and challenges of mycorrhizal symbiosis in orchid medicinal plants

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Chinese Herbal Medicines 2024年第2期16卷 172-179页

作者： Chunyan Leng Mengyan Hou Yongmei Xing juan Chen Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine Ministry of EducationInstitute of Medicinal Plant DevelopmentChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100193China

The family Orchidaceae is of the most diverse taxon in the plant kingdom,and most of its members are highly valuable herbal *** have a unique mycorrhizal symbiotic relationship with specific fungi for carbohydrate and nutrient supplies in their whole *** large-scale cultivation of the medicinal plant Gastodia elata is a successful example of using mycorrhizal symbiotic *** this review,we adopted *** and Dendrobium officinale as examples to describe the characteristics of orchid mycorrhiza and mycorrhizal benefits for host plants’growth and health(*** and abiotic stress and secondary metabolite accumulation).The challenges in applying mycorrhizal technology to the cultivation of orchid medicinal plants in the future were also *** review aims to serve as a theoretical guide for the cultivation of mycorrhizal technology in medicinal orchid plants.

关键词： Dendrobium officinale Kimura&Migo ecological cultivation Gastodia elata Blume mycorrhiza orchid medicinal plants symbiosis mechanisms

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Eosinophils promote CD8+ T cell memory generation to potentiate anti-bacterial immunity

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Signal Transduction and Targeted Therapy 2024年第3期9卷 1230-1243页

作者： Jun Zhou Jiaqi Liu Bingjing Wang Nan Li juan Liu Yanmei Han Xuetao Cao Institute of Immunology Zhejiang University School of MedicineHangzhou 310058China National Key Laboratory of Immunity and Inflammation Institute of ImmunologyNaval Medical UniversityShanghai 200433China Department of Immunology Center for ImmunotherapyInstitute of Basic Medical SciencesPeking Union Medical CollegeChinese Academy of Medical SciencesBeijing 100005China Institute of Immunology College of Life SciencesNankai UniversityTianjin 300071China

Memory CD8+T cell generation is crucial for pathogen elimination and effective vaccination against *** cellular and molecular circuitry that underlies the generation of memory CD8+T cells remains *** can modulate inflammatory allergic responses and interact with lymphocytes to regulate their functions in immune *** we report that eosinophils are required for the generation of memory CD8+T cells by inhibiting CD8+T cell ***-deficient mice display significantly impaired memory CD8+T cell response and weakened resistance against Listeria monocytogenes(L.m.)***,eosinophils secrete interleukin-4(IL-4)to inhibit JNK/Caspase-3 dependent apoptosis of CD8+T cells upon *** in ***,active eosinophils are recruited into the spleen and secrete more IL-4 to suppress CD8+T cell apoptosis during early stage of *** in *** transfer of wild-type(WT)eosinophils but not IL-4-deficient eosinophils into eosinophil-deficient mice could rescue the impaired CD8+T cell memory ***,our findings suggest that eosinophil-derived IL-4 promotes the generation of CD8+T cell memory and enhances immune defense against *** study reveals a new adjuvant role of eosinophils in memory T cell generation and provides clues for enhancing the vaccine potency via targeting eosinophils and related cytokines.

关键词： impaired immunity spleen

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