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How can technology and efficiency alleviate the dilemma of economic growth and carbon emissions in China's industrial economy? A metafrontier decoupling decomposition analysis

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Petroleum science 2024年第2期21卷 1415-1428页

作者： Miao Wang Chao feng school of Business Zhengzhou UniversityZhengzhou450001HenanChina school of Economics and Business Administration Chongqing UniversityChongqing400030China

This paper attempts to explore the decoupling relationship and its drivers between industrial economic increase and energy-related CO_(2) emissions(ICE). Firstly, the decoupling relationship was evaluated by Tapio index. Then, based on the DEA meta-frontier theory framework which taking into account the regional and industrial heterogeneity and index decomposition method, the driving factors of decoupling process were explored mainly from the view of technology and efficiency. The results show that during2000-2019, weak decoupling was the primary state. Investment scale expansion was the largest reason hindering decoupling process of industrial increase from ICE. Both energy saving and production technology achieved significant progress, which facilitated the decoupling process. simultaneously, the energy technology gap and production technology gap among regions have been narrowed, and played a role in promoting decoupling process. On the contrary, both scale economy efficiency and pure technical efficiency have inhibiting effects on decoupling process. The former indicates that the scale economy of China's industry was not conducive to improve energy efficiency and production efficiency, while the latter indicates that resource misallocation problem may exist in both energy market and product market.

关键词： China's industrial sector Decoupling process Meta-frontier DEA Index decomposition method Driving factors

Geological characteristics of unconventional tight oil reservoir (10^(9) t): A case study of Upper Cretaceous Qingshankou Formation, northern songliao Basin, NE China

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China Geology 2024年第1期7卷 51-62页

作者： Li-zhi shi zhuo-zhuo Wang Zhan-tao Xing shan Meng shuai Guo si-miao Wu Li-yan Luo Chinese Academy of Geological sciences Beijing 100037China Beijing Institute of Engineering Geology Beijing 100048China

The Daqing exploration area in the northern songliao Basin has great potential for unconventional oil and gas resources,among which the total resources of tight oil alone exceed 109 t and is regarded as an important resource base of Daqing *** years of exploration in the Qijia area,songliao Basin,NE China,tight oil has been found in the Upper Cretaceous Qingshankou *** work out tight oil’s geological characteristics,taking tight oil in Gaotaizi oil layers of the Upper Cretaceous Qingshankou Formation in northern songliao Basin as an example,this paper systematically analyzed the geological characteristics of unconventional tight oil in Gao3 and Gao4 layers of the Qijia area,based on the data of the geological survey,well drilling journey,well logging,and *** is that three sets of hydrocarbon source rocks(K2qn1,K2qn2+3,and K2n1)develop in the examined area,and exhibit excellent type I and II kerogens,high organic matter abundance,and moderate *** reservoir is generally composed of thin-bedded mudstone,siltstone,and sandstone,and presents poor porosity(average 8.5 vol.%)and air permeability(average 4 mD).The main reservoir space primarily includes intergranular pores,secondary soluble pores,and intergranular soluble *** types of orifice throats were identified,namely fine throat,extra-fine throat,and micro-fine *** siltstone is generally oil-bearing,the reservoirs with slime and calcium become worse oil-bearing,and the mudstone has no obvious oil-bearing *** brittleness indices of the sandstone in the tight oil reservoir range from 40%to 60%,and those of the mudstone range from 40%to 45%,indicating a better brittleness of the tight oil *** on the study of typical core hole data,this paper gives a comprehensive evaluation of the properties of the tight oil and establishes a tight oil single well composite bar chart as well as the initial evaluation system with the core of properties in the tigh

关键词： Unconventional oil and gas Tight oil Thin-bedded mudstone-siltstone-sandstone reservoir Qijia area Qingshankou Formation Oil and gas exploration engineering songliao Basin Daqing oilfield

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部分功率直流变换器研究综述

电工技术学报 2024年第10期39卷 3021-3037页

作者：陶星澳王丰卓放西安交通大学未来技术学院西安710049 西安交通大学电气工程学院西安710049

随着直流负载功率等级的提高,直流变换器面临着效率、功率密度、成本、散热等一系列问题。部分功率处理技术能够解决上述问题,让DC-DC只流过系统总功率的一小部分,而剩余的主要功率则通过前馈路径直接在源荷间传输。该文全面阐述部分功... 详细信息

随着直流负载功率等级的提高,直流变换器面临着效率、功率密度、成本、散热等一系列问题。部分功率处理技术能够解决上述问题,让DC-DC只流过系统总功率的一小部分,而剩余的主要功率则通过前馈路径直接在源荷间传输。该文全面阐述部分功率处理技术的原理及分类,重点分析串联部分功率变换器的多种结构特性及优缺点,多维度总结归纳部分功率技术的能效分析方法,详细调研现有研究的实验样机情况,指出了部分功率直流变换器的未来研究方向和应用场景。

关键词：部分功率处理 DC-DC 非有功功率多象限工作

Oxygen vacancy boosting Fenton reaction in bone scaffold towards fighting bacterial infection

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International Journal of Extreme Manufacturing 2024年第1期6卷 296-311页

作者： Cijun shuai Xiaoxin shi feng Yang Haifeng Tian Pei feng state Key Laboratory of Precision Manufacturing for Extreme service Performance College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083People’s Republic of China Institute of Additive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013People’s Republic of China College of Mechanical Engineering Xinjiang UniversityUrumqi 830017People’s Republic of China

Bacterial infection is a major issue after artificial bone transplantation due to the absence of antibacterial function of bone scaffold,which seriously causes the transplant failure and even amputation in severe *** this study,oxygen vacancy(OV)defects Fe-doped Ti O2(OV-FeTiO2)nanoparticles were synthesized by nano TiO2and Fe3O4via high-energy ball milling,which was then incorporated into polycaprolactone/polyglycolic acid(PCLGA)biodegradable polymer matrix to construct composite bone scaffold with good antibacterial activities by selective laser *** results indicated that OV defects were introduced into the core/shell-structured OV-FeTiO2nanoparticles through multiple welding and breaking during the high-energy ball milling,which facilitated the adsorption of hydrogen peroxide(H2O2)in the bacterial infection microenvironment at the bone transplant *** accumulated H2O2could amplify the Fenton reaction efficiency to induce more hydroxyl radicals(·OH),thereby resulting in more bacterial deaths through·OH-mediated oxidative *** antibacterial strategy had more effective broad-spectrum antibacterial properties against Gram-negative Escherichia coli(***)and Gram-positive staphylococcus aureus(***).In addition,the PCLGA/OV-FeTiO2scaffold possessed mechanical properties that match those of human cancellous bone and good biocompatibility including cell attachment,proliferation and osteogenic differentiation.

关键词： bacterial infection bone scaffold selective laser sintering Fenton reaction antibacterial properties

strong hetero-interface interaction in 2D/2D Wse_(2)/ZnIn_(2)s_(4) heterostructures for highly-efficient photocatalytic hydrogen generation

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Journal of Energy Chemistry 2024年第10期97卷 379-387,I0008页

作者： Xu Guo Xing Liu jing shan zhuo Xu Zhiming Fang Lu Wang shengzhong Liu school of Energy Powerand Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China shaanxi Key Laboratory for Advanced Energy Devices School of Materials Science and EngineeringShanxi Normal UniversityXi'an 710119ShanxiChina Qinghai Advanced Energy storage Laboratory SPIC Qinghai Photovoltaic Industry Innovation Center Co.Ltd.State Power Investment CorporationXining 810oo7QinghaiChina Key Laboratory of Photoelectric Conversion and Utilization of solar Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Center of Materials science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Green hydrogen is urgently required for sustainable development of human beings and rational construction of heterostructures holds great promising for photocatalytic hydrogen ***,2D/2D Wse_(2)/ZnIn_(2)s_(4) heterostructures with strong hetero-interface interaction and abundant contact were constructed via an impregnation-annealing *** charge transfer from ZnIn_(2)s_(4) to Wse_(2)was evidenced by transient absorption spectroscopy in crafted heterostructures owing to the tight and2D face-to-face *** a result,the prepared Wse_(2)/ZnIn_(2)s_(4) heterostructures exhibited boosted photocatalytic performance and a highest hydrogen evolution rate of 3.377 mmol/(g h)was achieved with an apparent quantum yield of 45.7%at 420 *** work not only provides new strategies to achieve efficient 2D/2D heterostructures but also paves the way for the development of green hydrogen in the future.

关键词： strong hetero-interface interaction in 2D/2D Wse_(2)/ZnIn_(2)s_(4) heterostructures for highly-efficient photocatalytic hydrogen generation

Analysis of application range of simplified models for field to thermo-field to thermionic emission processes from the cathode

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Plasma science and Technology 2024年第9期26卷 51-60页

作者： Li sUN zhuo DAI Ming XU Wei WANG Zengyao LI Applied Physics Department Xi’an University of TechnologyXi’an 710048People’s Republic of China Key Laboratory of Thermo-Fluid science and Engineering Ministry of EducationSchool of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China

Electron emission plays a dominant role in plasma-cathode interactions and is a key factor in many plasma phenomena and industrial *** is necessary to illustrate the various electron emission mechanisms and the corresponding applicable description models to evaluate their impacts on discharge *** this study,detailed expressions of the simplified formulas valid for field emission to thermo-field emission to thermionic emission typically used in the numerical simulation are proposed,and the corresponding application ranges are determined in the framework of the Murphy-Good theory,which is commonly regarded as the general model and to be accurate in the full range of conditions of the validity of the *** parameterization was used to evaluate the emission current density of the Murphy-Good formula,and a deviation factor was defined to obtain the application ranges for different work functions(2.5‒5 eV),cathode temperatures(300‒6000 K),and emitted electric fields(10^(5) to 10^(10) V·m^(-1)).The deviation factor was shown to be a nonmonotonic function of the three parameters.A comparative study of particle number densities in atmospheric gas discharge with a tungsten cathode was performed based on the one-dimensional implicit particle-in-cell(PIC)with the Monte Carlo collision(MCC)method according to the aforementioned application *** was found that small differences in emission current density can lead to variations in the distributions of particle number density due to changes in the collisional *** study provides a theoretical basis for selecting emission models for subsequent numerical simulations.

关键词： electron emission processes application range Murphy-Good theory implicit particlein-cell Monte Carlo collision method

Unconventional Organic Low-Dimensional Crystals:Diversity and Potential Applications

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CCs Chemistry 2024年第7期6卷 1628-1653页

作者： Jin feng Mao sun Ying-Xin Ma Zhen-Yu Geng Chuan-Zeng Wang shu-Ping zhuo shu-Hai Chen Hong-Tao Lin Xue-Dong Wang school of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000 school of Resources and Environmental Engineering Shandong University of TechnologyZibo 255000 Institute of Functional Nano&soft Materials(FUNsOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123

Organic low-dimensional crystals have garnered escalating interests in the realms of miniaturized optoelectronics and integrated *** continual expansion of molecular systems and improvement in experimental conditions have given rise to unconventional organic low-dimensional crystals,which showcase a variety of appealing structure-dependent properties in the realm of organic semiconductors,owing to their adaptable physicochemical characteristics and exceptional optoelectronics ***,the development of unconventional low-dimensional crystals is filled with abundant possibilities due to their diverse application ***,we present a comprehensive overview of advancements in research on representative cases of unconventional low-dimensional organic crystals,using a systematic and rational structural ***,we have also discussed the existing challenges and future directions,aspiring to deepen understanding and encourage further research exploration in this field.

关键词： organic semiconductor crystal growth precise synthesis noncovalent interaction integrat-ed photonics

Frequency Domain Fatigue Evaluation on sCR Girth-Weld Based on structural stress

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China Ocean Engineering 2024年第2期38卷 255-270页

作者： ZHANG Long ZHAO Tian-feng College of safety and Ocean Engineering China University of Petroleum(Beijing)Beijing 102249China

The steel Catenary Riser(sCR)is a vital component for transporting oil and gas from the seabed to the floating *** harsh environmental conditions and complex platform motion make the sCR’s girth-weld prone to fatigue *** structural stress fatigue theory and Master s-N curve method provide accurate predictions for the fatigue damage on the welded joints,which demonstrate significant potential and compatibility in multi-axial and random fatigue ***,we propose a new frequency fatigue model subjected to welded joints of sCR under multiaxial stress,which fully integrates the mesh-insensitive structural stress and frequency domain random process and transforms the conventional welding fatigue technique of sCR into a spectrum analysis technique utilizing structural ***,a full-scale FE model of sCR with welds is established to obtain the modal structural stress of the girth weld and the frequency response function(FRF)of modal coordinate,and a biaxial fatigue evaluation about the girth weld of the sCR can be achieved by taking the effects of multi-load correlation and pipe-soil interaction into *** research results indicate that the frequency-domain fatigue results are aligned with the time-domain results,meeting the fatigue evaluation requirements of the sCR.

关键词： sCR girth weld random vibration self(cross)power spectrum structural stress method biaxial fatigue damage

Establishing prognostic models for intrahepatic cholangiocarcinoma based on immune cells

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World Journal of Gastrointestinal Oncology 2024年第10期16卷 4092-4103页

作者： zhuo-Ran Wang Cun-Zhen Zhang Zhan Ding Yi-zhuo Li Jian-Hua Yin Nan Li Department of Hepatic surgery I(Ward I)shanghai Eastern Hepatobiliary surgery Hospital Navy Medical UniversityShanghai 200433China Key Laboratory of Biological Defense Ministry of EducationNavy Medical UniversityShanghai 200433China shanghai Key Laboratory of Medical Bioprotection Navy Medical UniversityShanghai 200433China Department of Epidemiology Faculty of Navy MedicineNavy Medical UniversityShanghai 200433China Department of Oncology 905 Hospital of People’s Liberation Army NavyShanghai 200050China Department of Hepatobiliary surgery The Second Affiliated HospitalWenzhou Medical UniversityWenzhou 325000Zhejiang ProvinceChina

BACKGROUND Intrahepatic cholangiocarcinoma(ICC)is a malignant liver tumor that is challenging to treat and manage and current prognostic models for the disease are inefficient or ***-associated immune cells are critical for tumor development and *** main goal of this study was to establish models based on tumor-associated immune cells for predicting the overall survival of patients undergoing surgery for *** To establish 1-year and 3-year prognostic models for ICC after surgical *** Immunohistochemical staining was performed for CD4,CD8,CD20,pan-cytokeratin(CK),and CD68 in tumors and paired adjacent tissues from 141 patients with ICC who underwent curative *** of variables was based on regression diagnostic procedures and goodness-of-fit tests(PH assumption).Clinical parameters and pathological diagnoses,combined with the distribution of immune cells in tumors and paired adjacent tissues,were utilized to establish 1-and 3-year prognostic *** This is an important application of immune cells in the tumor ***4,CD8,CD20,and CK were included in the establishment of our prognostic model by stepwise selection,whereas CD68 was not significantly associated with the prognosis of *** integrating clinical data associated with ICC,distinct prognostic models were derived for 1-and 3-year survival outcomes using variable *** 1-year prediction model yielded a C-index of 0.7695%confidence interval(95%CI):0.65-0.87 and the 3-year prediction model produced a C-index of 0.69(95%CI:0.65-0.73).Internal validation yielded a C-index of 0.761(95%CI:0.669-0.853)for the 1-year model and 0.693(95%CI:0.642-0.744)for the 3-year *** We developed Cox regression models for 1-year and 3-year survival predictions of patients with ICC who underwent resection,which has positive implications for establishing a more comprehensive prognostic model for ICC based on tumor immune microenvironment an

关键词： Intrahepatic cholangiocarcinoma Tumor immune cells Biomarkers Prognosis Prediction models