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A Study of the Vibration Characteristics of Flexible Mechanical Arms for Pipe String Transportation in Oilfields

ENERGIES 2022年第6期15卷 2030页

作者： Wang, Yan Lu, shuwen Gao, Sheng ren, Yongliang Zhang, Ruijie Northeast Petr Univ Sch Mech Sci & Engn Daqing 163318 Peoples R China Northeast Petr Univ Lab Syst Simulat & Control Daqing 163318 Peoples R China

During the drilling and repairing of wells, the pipe string transfer equipment has a high work frequency. The movement accuracy, response speed, and controllability of the equipment have significant impacts on the stability. In this paper, we propose an analysis method of mechanical arms to lift pipe strings using a rigid-flexible coupling model. With the mechanical arm as a flexible body and the mechanical hand as a rigid body, a numerical calculation model of the rigid-flexible coupling of the system was established based on the Lagrangian equation. ADAMS and Ansys software were applied to numerical simulations of this system to investigate the lifting characteristics, the influence of the operation parameters and structure parameters, and the contact collision analysis of the mechanical arm. The conditions of rigid-flexible modeling for the multi-body system and the main factors affecting the vibration characteristics of the flexible arm are described. We conclude that the arm should be modeled as a rigid body if the structure parameter [w/l] (elastic deformation/length) is between 1/650 and 1/1000, the system can be modeled as a rigid-flexible coupling if [w/l] is between 1/400 and 1/650, and the arm should be modeled as a flexible body and the influence and compensation of the control method should be considered if [w/l] is between 1/250 and 1/400.

关键词： transporting pipe string mechanical arm modeling theory rigid-flexible coupling vibration characteristic

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Planar chiral [2.2]paracyclophanyl-based boron fluoride complexes: synthesis, crystal structure and photophysical properties

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DALTON TRANSACTIONS 2021年第37期50卷 12963-12969页

作者： Duan, Wenzeng Ji, Honghan Yang, Zeren Yao, Qingxia Huo, Yanmin ren, Xuerui Zhao, Jiaojiao Gong, shuwen Liaocheng Univ Sch Chem & Chem Engn Inst Funct Organ Mol & Mat 1 Hunan Rd Liaocheng 252000 Shandong Peoples R China

Planar chiral [2.2]paracyclophanyl-based boron fluoride complexes (3a-3d) were designed and facilely synthesized. The X-ray structure study, theoretical calculations and CD spectra reveal the intense emission and planar chiral structures of these complexes. In particular, 3a-3d show moderate quantum yields and large Stokes shifts both in solution and solid state. Furthermore, the blue-shifted mechanochromic properties of 3a and 3b were both investigated in the solid state. This work is the first study on planar chiral boron monofluoride complexes within the boron fluoride complex field.

关键词： Fluorine compounds

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Rice cultivation in saline-alkaline soil shifts the coupling of phosphorus functional genes and salt tolerance genes based on metagenomic analysis

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APPLIED SOIL ECOLOGY 2025年 211卷

作者： Lv, Qilin Fan, Jingbiao Zhou, Tairan Pan, Xiaocheng Li, Huixian ren, Xueqin Zhang, Lin Hu, shuwen China Agr Univ Coll Resources & Environm Sci Dept Environm Sci & Engn Beijing 100193 Peoples R China China Agr Univ Coll Resources & Environm Sci State Key Lab Nutrient Use & Management Key Lab Plant Soil InteractMinist Educ Beijing 100193 Peoples R China China RongTong Agr Dev Grp Corp Ltd Beijing 100020 Peoples R China China Agr Univ Coll Resources & Environm Sci 2 Yuanmingyuan West Rd Beijing 100193 Peoples R China 14 Dongdaqiao Rd Beijing 100020 Peoples R China

Rice cultivation in saline-alkali soil can improve soil fertility and microbial activity. How this impacts the relative abundance of salt tolerance genes and phosphorus (P) cycling genes in soil, and their relationship, remains unclear. We studied the physicochemical and microbial properties of barren saline-alkali wasteland soil (WL) and saline-alkali wasteland cultivated with rice for 10, 21, or 30 years, in the Sognen Plain of northeastern China. Our results exhibited that rice cultivation in saline-alkaline soil reduced the saline-alkali properties of soil and mitigated osmotic stress to microorganisms. Rice planted in saline-alkaline soil reduced the abundance of microbial salt tolerance genes and the network interactions between salt tolerance and P cycling genes. Compared to 10-year and 21-year rice-planted saline-alkaline soils, rice planted 30 years ago had increased content of labile P, moderately labile P and organic P, resulting the decreases of the relative abundance of genes for organic P mineralization (phoD) and inorganic P solubilization (gcd) and the increase in the relative abundance of genes for low-affinity inorganic phosphate transporters (pit). Additionally, long-term rice cultivation decreased soil pH, leading to a decrease of abundance of inorganic P solubilization genes. The increase of soil P availability mitigated P limitation, resulting in the complexity of the P cycling gene network in 21-year and 30-year cultivated plots lower than in 10-year plot. These results suggest that reclamation of saline land for rice alleviates the effects of soil salinity on microbial activities, enhances soil P availability, and reduces the interaction of P cycling and salt tolerance genes, promoting the microbial P assimilation in soil.

关键词： Saline-alkali soil Rice cultivation Phosphorus Metagenomics cycling genes Salt-tolerance genes Co-occurrence network

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De novo mutation in HNF-1β gene as a cause for Maturity-onset Diabetes of the Young type 5 with sustained hypomagnesemia

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INTERNATIONAL JOURNAL OF DIABETES IN DEVELOPING COUNTRIES 2021年第2期41卷 354-357页

作者： ren, Bo Chen, Yan Zhang, Qiang Chen, shuwen Zhang, Shunxiao Wang, Jie Zhang, Yan Laiwu Cent Hosp Dept Neuroendocrinol Xinwen Min Grp Laiwu 271103 Shandong Peoples R China Hosp Integrated Tradit Chinese & Western Med Dept Radiol Shanghai Baoshan Branch Shanghai 201900 Peoples R China Laiwu Cent Hosp Dept Pain Management Xinwen Min Grp Laiwu 271103 Shandong Peoples R China Hosp Integrated Tradit Chinese & Western Med Dept Endocrinol Shanghai Baoshan Branch 181 Youyi Rd Shanghai 201900 Peoples R China

Background Maturity-onset Diabetes of the Young type 5 (MODY5) is clinically heterogeneous, and the genetic examination is important to provide the accurate diagnosis. Identification of more cases will better understand the genotype-phenotype correlations of this disorder. Methods We collected the clinical and biochemical data, using the whole-exome gene detection and multiplex ligation-dependent probe Amplification to detect the pathogenic gene variants. Results The proband is a 39-year-old female, and presenting with symptoms including polyuria, polydipsia, and weight loss for 6 months. Her BMI was 17.6 kg/m(2). Laboratory tests indicated hypokalemia (3.1 mmol/L), hypomagnesemia (0.4 mmol/L), and hypocalcemia (1.91 mmol/L). Glycated hemoglobin (HbA1c) was 13.7%, fasting C-peptide was 0.24 ng/mL (normal range: 0.3-3.73 ng/mL). Both glutamic acid decarboxylase and islet cell antibodies were negative. Abdominal magnetic resonance image showed the agenesis of the tail and body of the pancreas and the presence of disseminated cysts of the left kidney. Genetic examination displayed a de novo heterozygous deletion of the whole HNF-1 Beta gene (NM_000458.3). Three-year follow-up after the diagnosis showed that the patient has sustained hypomagnesemia and cannot maintain an appreciable increae in serum magnesium levels (0.52-0.61 mmol/L), although she was using the double-dose magnesium aspartate. Moreover, she cannot achieve good glucose control either. Conclusion Our findings indicted that MODY is highly heterogeneous and patients with additional extrapancreatic clinical features and hypomagnesemia should be screened for MODY5.

关键词： Maturity-onset Diabetes of the Young Hypomagnesemia Hepatocyte nuclear factor-1 beta eta (HNF-1 beta) Mutation Diabetes mellitua

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Research on the Thermal Properties of Urban Native Sewage Basedon Regression Model

Research on the Thermal Properties of Urban Native Sewage Ba...

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2023年工业设计与环境工程国际学术会议

作者： shuwen Ding Lin Zhang Liang Liu Xiaotong ren Junze Du School of Municipal and Environmental Engineering Shenyang Jianzhu University

At this stage, due to the lack of research on the basic thermophysical parameters of urban primary sewage, the change of thermophysical state of sewage cannot be well grasped, resulting in a low utilization rate of low-grade thermal energy of primary sewage. In this paper, a regression model is established based on the existing data to analyze the changes of basic thermophysical parameters such as density, thermal conductivity, constant pressure specific heat and other basic thermal properties of residential and industrial sewage at different sewage temperatures. Through model analysis, it is found that the density of residential sewage is significantly lower than that of industry. The sewage density of both types of sewage reached a maximum of about 10°C at a sewage temperature, and then showed a decreasing trend again. The thermal conductivity of residential sewage is lower than that of industrial sewage, and the thermal conductivity of sewage gradually increases with the increase of sewage temperature;From the analysis of constant pressure specific heat of sewage, the specific heat of residential sewage is greater than that of industrial type, and the specific heat of sewage decreases with the increase of temperature, and the change range is small.

关键词： Sewage thermal physical properties Regression model Clean energy

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Sulfur dynamics in saline sodic soils: The role of paddy cultivation and organic amendments

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ECOLOGICAL INDICATORS 2024年 162卷

作者： Zhou, Tairan Wang, Zihe Lv, Qilin Zhang, Yiying Tao, Shuming ren, Xueqin Gao, Haixiang Gao, Zideng Hu, shuwen China Agr Univ Coll Resources & Environm Sci 2 Yuanmingyuan West Rd Beijing 100193 Peoples R China Beijing Key Lab Farmland Soil Pollut Prevent & Rem 2 Yuanmingyuan West Rd Beijing 100193 Peoples R China Beijing Dabeinong Technol Grp Co Ltd Zhongguancun Dajie 27 Beijing 100080 Peoples R China China Agr Univ Dept Appl Chem 2 Yuanmingyuan West Rd Beijing 100193 Peoples R China Beijing Baoshu Agr Technol Co Ltd 188 South Fourth Ring West Rd Beijing Peoples R China

The phenomenon of sulfur (S) deficiency in Chinese soil is becoming increasingly severe, especially in the northeastern saline-sodic wasteland (WL). To determine the bioavailability of S in long-term cultivated paddy soil with or without organic amendment addition, the long-term field experiment site was established and incubation experiments were conducted. Compared to WL, soil properties have been continuously improved during the 15-year paddy field (PF) cultivation, ultimately enhancing the content of soil organic carbon (by 242.62 %), total nitrogen (by 126.49 %) and alkali-hydrolyzed nitrogen (by 28.07 %). Additionally, soil salinization has been decreasing, and the stock of total sulfur (TS) and available sulfur (AS) in the 0-60 cm soil layer have increased by 32.09 % and 293.52 % respectively. In contrast, organically-amended soil (OA) manifested superior TS and AS levels vs. PF. Additionally, water-soluble sulfur (WSS) was markedly elevated, registering post-annual increments of 227.31 % and 268.36 % in PF and OA, respectively, relative to WL. The key mechanistic impetus for the application of organic amendments was the enhancement of the soil's adsorptive and mineralization capabilities. As observed in our soil culture experiment, the maximum adsorption of sulfate ions and the cumulative mineralization of sulfur in the soil follow the pattern of OA > PF > WL. The Partial Least Squares Path Model (PLSPM) corroborated that both organic amendments and years of cultivation indirectly influenced total inorganic sulfur fractions. This influence is primarily mediated via structural soil enhancements and salinization amelioration, thereby elevating available quantities of sulfur in saline-sodic soil environments. In conclusion, from the perspective of soil sulfur biogeochemical cycling, we have confirmed that reclaiming saline-sodic wasteland for paddy field could be a beneficial and sustainable approach for soil management. These findings of this study can also pr

关键词： Saline-sodic wasteland Rice cultivation Sulfur bioavailability Soil salinization reduction

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A refractive index sensor based on metal-insulator-metal coupling ring resonator with a stub

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FRONTIERS IN PHYSICS 2024年 11卷

作者： Cao, Yuhao Yan, Shubin Liu, Feng Wang, Jin Chang, shuwen Liu, Guang Zhang, Wei Wu, Taiquan ren, Yifeng North Univ China Sch Elect & Control Engn Taiyuan Peoples R China Zhejiang Univ Water Resources & Elect Power Sch Elect Engn Hangzhou Peoples R China Joint Lab Intelligent Equipment & Syst Water Conse Hangzhou Peoples R China

In this work, a refractive index sensor structure is proposed, which consists of the met-al-insulator-metal (MIM) waveguide coupling with ring resonator with a rectangular cavity. Its sensing characteristics are analyzed by the finite element analysis method. SPPs is an electromagnetic wave mode excited by the oscillatory coupling of free electron-photon interactions on the surface region of a metal, whose field strength is maximum at the metal-dielectric partition interface and then decays exponentially to both sides The results show that the sensing characteristics of the ring resonator can be changed by introducing a stub, which can achieve the purpose of enhancing the coupling efficiency of SPPs. The structure has two Fano peaks, and each peak can be individually regulated by changing the size of the sensing structure. Sensitivity is the key performance indicator of the system, which is the shift in resonance wavelength caused by a change in refractive index when the ambient medium is changed. The best sensitivity of this structure can reach 2,300 nm/RIU with a figure of merit (FOM) value of 60 RIU-1. The proposed structure has great potential in nano-sensors.

关键词： surface plasmon polaritons (SPPs) fano resonance refractive index sensor metal-insulator-metal ring resonator with a stub

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Clinical Characteristics and Prognosis of Genetic Focal Segment Glomerulosclerosis

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AMERICAN JOURNAL OF KIDNEY DISEASES 2024年第5期84卷 660-662页

作者： Hao, Xu Yu, shuwen Weng, Qinjie Fang, Zhengying Zheng, Qimin Zhao, Yafei Liu, Jian Ma, Jun Zhang, Chunli Liu, Yunzi Li, Junru Yang, Mingxin ren, Hong Xie, Jingyuan Shanghai Jiao Tong Univ Sch Med Ruijin Hosp Dept Nephrol Shanghai Peoples R China Shanghai Jiao Tong Univ Inst Nephrol Sch Med Shanghai Peoples R China Shanghai Jiao Tong Univ Ruijin Hosp Inst Nephrol Sch MedDept Nephrol 197 Ruijin Er Rd Shanghai 200025 Peoples R China

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Nanometer refractive index sensor based on water droplet cavity structure with rectangular short rod

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FRONTIERS IN PHYSICS 2024年 12卷

作者： Wang, Jin Yan, Shubin Liu, Feng Chang, shuwen Cao, Yuhao Cui, Yang Liu, Jilai Zhang, Yi ren, Yifeng North Univ China Sch Elect & Control Engn Taiyuan Peoples R China Zhejiang Univ Water Resources & Elect Power Sch Elect Engn Hangzhou Peoples R China Joint Lab Intelligent Equipment & Syst Water Conse Hangzhou Peoples R China

In this paper, a novel nano sensor structure is proposed, which consists of a metal-insulator-metal waveguide (MIM) with rectangular baffles and a water droplet cavity with rectangular stubs (WDCRS). The WDCRS structure optimizes the sensitivity of a single water droplet cavity and makes the transmission curve clearer and smoother. The transmission characteristics of WDCRS structure were simulated using finite element method (FEM). The transmission characteristics of the exported structure were analyzed in detail. In addition, the influence of structural geometric parameters on sensing performance was also studied, and it was found that the size of the water droplet cavity is a key factor in improving sensitivity. When applied to a refractive index sensor, the structure achieves a sensitivity of up to 2,300 nm/RIU with a corresponding figure of merit (FOM) of 60.5. These works provide some ideas for the design of high-performance nanostructures and multiple Fano resonance excitation structures.

关键词： metal-insulator-metal surface plasmon polaritons refractive index sensor Fano resonance water droplet cavity

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Collab-Overcooked: Benchmarking and Evaluating Large Language Models as Collaborative Agents

arXiv

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arXiv 2025年

作者： Sun, Haochen Zhang, shuwen ren, Lei Xu, Hao Fu, Hao Yuan, Caixia Wang, Xiaojie Beijing University of Posts and Telecommunications China Li Auto Inc China

Large language models (LLMs) based agent systems have made great strides in real-world applications beyond traditional NLP tasks. This paper proposes a new LLM-powered Multi-Agent System (LLM-MAS) benchmark, Collab-Overcooked, built on the popular Overcooked-AI game with more applicable and challenging tasks in interactive environments. Collab-Overcooked extends existing benchmarks from two novel perspectives. First, it provides a multi-agent framework supporting diverse tasks and objectives and encourages collaboration through natural language communication. Second, it introduces a spectrum of process-oriented evaluation metrics to assess the fine-grained collaboration capabilities of different LLM agents, a dimension often overlooked in prior work. We conduct extensive experiments over 10 popular LLMs and show that, while the LLMs present a strong ability in goal interpretation, there is a significant discrepancy in active collaboration and continuous adaption that are critical for efficiently fulfilling complicated tasks. Notably, we highlight the strengths and weaknesses in LLM-MAS and provide insights for improving and evaluating LLM-MAS on a unified and open-sourced benchmark. Environments, 30 open-ended tasks, and an integrated evaluation package are now publicly available at https://***/YusaeMeow/Collab-Overcooked. © 2025, CC BY.

关键词： Procedure oriented languages

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