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Journal of Iron and Steel Research International 2012年第12期19卷 73-78页

作者： ZHANG zhi-min cai qing-wu YU Wei LIXiao-lin WANG Li-dong Metallurgical Engineering Research Institute University of Science and Technology Beijing Beijing 100083 China

The aim was to investigate transformation behavior and transformation kinetics of an ultra-low carbon bai- nitic steel during continuous cooling. Continuous cooling transformation （CCT） curves of tested steel were measured by thermal dilatometer and metallographic structures at room temperature were observed by optical microscope. Then transformation kinetic equation of austenite to ferrite as well as austenite to bainite was established by analyzing the relationship of lnln]-l/（1--f）] and lnt in the kinetic equation on the basis of processed experimental data. Finally, the measured and calculated kinetic behaviors of the steel during continuous cooling were compared and growth pat- terns of transformed ferrite and bainite were analyzed. Results showed that calculated result was in reasonable agree- ment with the experimental data. It could be concluded that the growth modes of transformed ferrite and bainite were mainly one dimension as the Avrami exponents were between 1 and 2.

关键词： ultra low carbon bainitic steel continuous cooling transformation kinetics Avrami equation

Clinical application of oral contrast-enhanced ultrasound in evaluating the preoperative T staging of gastric cancer

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World Journal of Gastroenterology 2024年第41期30卷 4439-4448页

作者： Yu Liang Wan-Yi Jing Jun Song Qiu-Xin Wei zhi-qing cai Juan Li Ping Wu Dong Wang Yi Ma Department of Ultrasound Sichuan Provincial People's HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengdu 610072Sichuan ProvinceChina Department of Pathology Sichuan Provincial People's HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengdu 610072Sichuan ProvinceChina

BACKGROUND Oral contrast-enhanced ultrasound(OCEUS)is widely used in the noninvasive diagnosis and screening of gastric cancer(GC)in *** To investigate the clinical application of OCEUS in evaluating the preoperative T staging of gastric *** OCEUS was performed before the operation,and standard ultrasound images were *** depth of infiltration of GC(T-stage)was evaluated according to the American Joint Committee on Cancer 8th edition of the tumor-nodemetastasis staging ***,with postoperative pathological staging as the gold standard reference,the sensitivity,specificity,negative predictive value,positive predictive value,and diagnostic value of OCEUS T staging were *** OCEUS achieved diagnostic accuracy rates of 76.6%(T1a),69.6%(T1b),62.7%(T2),60.8%(T3),88.0%(T4a),and 88.7%(T4b),with an average of 75.5%.Ultrasonic T staging sensitivity exceeded 62%,aside from T1b at 40.3%,while specificity was over 91%,except for T3 with 83.5%.The Youden index was above 60%,with T1b and T2 being *** T staging corresponded closely with pathology in T4b(kappa>0.75)and moderately in T1a,T1b,T2,T3,and T4a(kappa 0.40-0.75),registering a concordance rate exceeding 84%.CONCLUSION OCEUS was effective,reliable,and accurate in diagnosing the preoperative T staging of *** a noninvasive diagnostic technique,OCEUS merits clinical popularization.

关键词： Gastric cancer Oral contrast-enhanced ultrasound Tumor-node-metastasis staging Noninvasive diagnosis and screening Clinical value

Prospects on mangrove knowledge services in the smart era: From plant atlas to knowledge graphs

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Science China Earth Sciences 2025年第1期68卷 111-127页

作者： zhi-Wei HOU Wenlong JING Cheng-zhi QIN Ji YANG qing XIA Xiaoling YIN Key Laboratory of Guangdong for Utilization of Remote Sensing and Geographical Information System Guangdong Open Laboratory of Geospatial Information Technology and Application Guangzhou Institute of Geography Guangdong Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences School of Traffic & Transportation Engineering Changsha University of Science and Technology

Mangroves are crucial to the ecological security of the Earth and human well-being. Their management, conservation, and restoration are of great importance and necessitate the support of spatio-temporal information and multidisciplinary knowledge such as biology and ecology. Traditional knowledge services such as plant atlas provide illustrated textual knowledge of mangroves. However, this kind of service is oriented to information retrieval and is incapable of effectively mining and utilizing fragmented knowledge from multi-source heterogeneous data, facing the problem of “massive data, rare knowledge”. Knowledge graphs are capable of extracting, organizing, and fusing the knowledge contained in massive data into semantic networks that can be understood and computed by computers. They provide a solution for the realization of intelligent knowledge services. Focusing on the urgent need for mangrove knowledge acquisition, formal representation, and intelligent services, this paper proposes a research prospect on mangrove knowledge graphs and knowledge services. We first analyze the similarities and differences between various domain-specific concepts of Tupu. On this basis, we define the mangrove knowledge graph as a large-scale knowledge base that integrates multi-disciplinary knowledge and spatio-temporal information with mangrove ecosystems as the core. Then, we propose a research framework for mangrove knowledge services that can realize the transformation from multi-modal data to intelligent knowledge services, including multiple research levels such as ubiquitous data sensing and aggregation, knowledge organization and graph construction, and intelligent mangrove knowledge services. Subsequently, the methods and workflow for constructing mangrove knowledge graphs are introduced. Finally, we discuss the challenges and possible future directions of mangrove knowledge services in the smart era, including the construction of a mangrove knowledge system that integra

关键词： Mangrove Tupu Knowledge graph Multi-modal Knowledge service

Epithelioid Angiosarcoma of Bone: A Neoplasm with Potential Pitfalls in Diagnosis

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Open Journal of Orthopedics 2012年第3期2卷 80-84页

作者： Jie Xu Ruo-Fan Ma Deng Li Liang-Ping Li zhi-qing cai Wen-Wu Dong Yan Chen Yue Ding Department of Orthopaedics Sun Yat-sen Memorial Hospital Sun Yat-sen University Guangzhou China Department of Orthopaedics Sun Yat-sen Memorial Hospital Sun Yat-sen University Guangzhou China.

Angiosarcoma of bone is an exceedingly rare primary bone malignancy that can present as an aggressive osteolytic lesion. This subset can radiologically mimic non-vascular neoplasms and impose serious challenges in reaching the correct diagnosis. Meanwhile histological diagnosis can be extremely challenging too, as the pathological features often resemble that of aneurysmal bone cysts. We present an unusual case of a 22-year-old woman who presented with a rapidly growing humeral tumor of 8 months’ duration. The case of intraosseous angiosarcoma presented as a diagnostic dilemma and the relevant radiological and pathologic findings were discussed. We describe the clinical, radiological and pathological features of this unique case, and review the literature concerning Angiosarcoma of bone. Our case highlights the diagnostic difficulties for such very rare tumours and clinico-pathological correlation is of paramount importance to differential diagnosis.

关键词： Angiosarcoma Bone Neoplasms Vascular Tissue Neoplasms Aneurysmal Bone Cysts Pitfall

濒危药用植物茅苍术法呢基焦磷酸合酶基因克隆及其表达分析

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中草药 2017年第4期48卷 760-766页

作者：蒋玲谷巍巢建国桑晓华韩赟刘青芝席彩彩南京中医药大学药学院江苏南京210023

目的克隆茅苍术Atractylodes lancea倍半萜类成分生物合成关键酶法呢基焦磷酸合酶(FPPS)基因全长并分析其表达规律。方法以茅苍术总RNA为模板,运用同源克隆法和RACE技术克隆茅苍术FPPS基因(Al FPPS)的c DNA全长,并进行生物信息学分析;用... 详细信息

目的克隆茅苍术Atractylodes lancea倍半萜类成分生物合成关键酶法呢基焦磷酸合酶(FPPS)基因全长并分析其表达规律。方法以茅苍术总RNA为模板,运用同源克隆法和RACE技术克隆茅苍术FPPS基因(Al FPPS)的c DNA全长,并进行生物信息学分析;用q RT-PCR和GC-MS分析不同生长阶段FPPS在茅苍术根茎中的表达及倍半萜类成分量变化,并分析二者的相关性。结果获得Al FPPS基因全长c DNA为1 320 bp(Gen Bank accession ***443242),含一个长1 029 bp的开放阅读框,编码342个氨基酸,包含5个保守功能域,其中2个富含天冬氨酸(DXXDD)。q RT-PCR及GC-MS结果显示不同时期茅苍术Al FPPS基因表达量与倍半萜类成分量呈显著正相关。结论首次克隆获得Al FPPS基因的全长c DNA,初步证明Al FPPS基因是茅苍术倍半萜类成分生物合成途径中的重要调控位点,为茅苍术倍半萜类成分生物合成途径阐明与生物工程应用提供科学依据。

关键词：茅苍术法尼基焦磷酸合酶基因克隆基因表达倍半萜

A Light Weight Traffic Volume Prediction Approach Based on Finite Traffic Volume Data

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Journal of Systems Science and Systems Engineering 2023年第5期32卷 603-622页

作者： Xing Su Minghui Fan zhi cai qing Liu Xiaojun Zhang Faculty of Information Technology Bering University of TechnologyBeijing100124China Shanghai Ocean University Shanghai201306China Academy of Opto-electronics Chinese Academy of SciencesBeijing100094China

As one of the key technologies of intelligent transportation systems, short-term traffic volume prediction plays an increasingly important role in solving urban traffic problems. In the last decade, many approaches were proposed for the traffic volume prediction from different perspectives. However, most of these approaches are based on a large amount of historical data. When there are only finite collected traffic data, they cannot be well trained, so the prediction accuracy of these approaches will be poor. In this paper, a tensor model is proposed to capture the change patterns of continuous traffic volumes. From collected traffic volume data, the element data are extracted to update the corresponding elements of the tensor model. Then, a tucker decomposition and gradient descent based algorithm is employed to impute the missing elements of the tensor model. After missing element imputation, the tensor model can be directly applied to the short-term traffic volume prediction through searching the corresponding elements of the model and the storage cost of the model is low. Our model is evaluated on real traffic volume data from PeMS dataset, which indicates that our model has higher traffic volume prediction accuracy than other approaches in the situation of finite traffic volume data.

关键词： Short-term traffic volume prediction tensor Tucker decomposition finite traffic volume data

Hot deformation characterization and processing map of Cu-10 %Fe-1.5 %Ag in situ composite

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Rare Metals 2017年第11期36卷 912-918页

作者： Jun-qing Guo He Yang Ping Liu zhi-Wei cai State Key Laboratory of Solidification Processing Northwestern Polytechnical University School of Materials Science and Engineering University of Shanghai for Science and Technology School of Materials Science and Engineering University of Henan Science and Technology

The Cu-10 %Fe-1.5 %Ag in situ composite with high strength, high conductivity and low cost was prepared, and its hot deformation behavior was investi- gated by isothermal compression test with true strain of 0.69, temperature range of 750-950℃ and strain rate of 0.002-1.000 s-1. The flow stress-strain response shows the characterization of dynamic recrystallization （DRX）, and the peak stress increases gradually with deformation tem- perature decreasing and strain rate increasing. The defor- mation activation energy of the composite for DRX is calculated as 241.864 ***1-1. The constitutive relation of the composite was got by Arrhenius equation. Further- more, according to the dynamic material modeling and Kumar-Prasad＇s instability criteria, the processing map was constructed and the unsafe regions for hot deformation were analyzed. Based on the processing map and microstructural evolution, the optimal parameter range for hot deformation processing is 750-863℃ at the strain rate of 0.002-0.013 s-1.

关键词： Cu-10 %Fe-1.5 %Ag in situ composite Hotcompression test Deformation characterization Processingmap Dynamic recrystallization

数字经济助推高等教育高质量发展:理论机制与实证检验

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黑龙江高教研究 2025年第2期43卷 44-53页

作者：蔡文伯周子晴石河子大学新疆石河子832000 塔里木大学新疆阿拉尔843300

基于2011—2021年中国31个省份的面板数据,采用双向固定效应模型、面板门槛模型和空间杜宾模型检验数字经济对高等教育高质量发展的影响。研究发现:数字经济对高等教育高质量发展具有正向促进作用,具体看对高等教育要素、能力和功能等... 详细信息

基于2011—2021年中国31个省份的面板数据,采用双向固定效应模型、面板门槛模型和空间杜宾模型检验数字经济对高等教育高质量发展的影响。研究发现:数字经济对高等教育高质量发展具有正向促进作用,具体看对高等教育要素、能力和功能等三个维度的影响依次减弱;数字经济对东部地区高等教育高质量发展有积极影响,对中西部地区无显著影响;数字经济发展水平对高等教育高质量发展具有边际效应递增的非线性影响;数字经济对本地高等教育高质量发展有正向影响,但对邻近地区存在负向空间溢出效应。为此,应强化数字化战略布局,促进高等教育与数字经济产业深度合作;通过打造合作示范区、制定地区发展规划、加大数字基础设施建设投资、开发数字教育资源共享平台等方式发挥东部地区优势,增强数字经济发达地区的辐射带动作用。

关键词：高等教育数字经济高质量发展门槛模型空间计量模型

Direct electrochemical reduction of solid vanadium oxide to metal vanadium at low temperature in molten CaCl_2-NaCl

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International Journal of Minerals,Metallurgy and Materials 2012年第6期19卷 499-505页

作者： Zhuo-fei cai zhi-mei Zhang Zhan-cheng Guo Hui-qing Tang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083 China

V205 sintered pellets and graphite rods were employed as the cathode and the anode, respectively; a molten CaC12-NaCI salt was used as the electrolyte. Then, V205 was directly reduced to metal vanadium by the Fray-Farthing-Chen （FFC） method at 873 K to realize low-temperature electrolysis. Two typical experimental conditions, electrolysis time and voltage, were taken into account to investigate the current efficiency and remaining oxygen content in electrolyzed products. The composition and microstmcture of the products were charac- terized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. SEM observations show that a higher voltage （1.8-3.4 V） and a longer electrolysis time （2-5 h） can improve the product quality separately, that is, a lower remaining oxygen content and a more uniform microstructure. The products with an oxygen content of 0.205wt% are successfully obtained below 3.4 V for 10 h. However, the current effi- ciency is low, and further work is required.

关键词： vanadium metallurgy vanadium pentoxide direct reduction electrolysis

Terahertz superconducting kinetic inductance detectors demonstrating photon-noise-limited performance and intrinsic generation-recombination noise

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Science China(Physics,Mechanics & Astronomy) 2022年第3期65卷 106-113页

作者： qing Shi Jing Li Qiang zhi Zheng Wang Wei Miao Sheng-cai Shi Purple Mountain Observatory Chinese Academy of SciencesNanjing 210034China School of Astronomy&Space Science University of Science and Technology of ChinaHefei 230026China

The development of large-format detector arrays with background-limited performance is of particular interest at the terahertz(THz) band, which is a unique band in search of our cosmic origins. With high sensitivity and being more promising in the pixel number and multiplexing technology, superconducting kinetic inductance detectors(KID) are emerging as a major choice of detectors of this type. Here we fabricate three-THz-band(0.35/0.85/1.4 THz) KIDs on a single chip from a 120-nm-thick aluminum(Al) superconducting film and measure photon-noise-limited performance and intrinsic generation-recombination noise at high(>1 p W) and low(<1 f W) optical radiation power, respectively. Their responses to blackbody(optical) radiation are proven to be purely from photons compared with the responses of two dark KIDs intentionally arranged on the same detector chip. The lowest optical noise equivalent power(NEP) reaches 6×10^(-18)W/Hz^(0.5)and the optical coupling efficiency is in the range of 49%-56% for the three KIDs, which are in good agreement with the simulation results.

关键词： terahertz kinetic inductance detectors(KID) photon-noise generation-recombination noise

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