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Fabrication of a Hydrophobic Hierarchical Surface on Shale Using Modified Nano-SiO_(2)for Strengthening the Wellbore Wall in drilling Engineering

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Engineering 2022年第4期8卷 101-110页

作者： Xianbin Huang Jinsheng Sun He Li ren Wang Kaihe lv Haichao Li Key Laboratory of Unconventional Oil and Gas development(China University of Petroleum(East China)) Ministry of EducationQingdao 266580China School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China CNPC Engineering Technology r&d Co. Ltd.Beijing 102206China

Wellbore stability is essential for safe and efficient drilling during oil and gas exploration and *** paper introduces a hydrophobic nano-silica(HNS)for use in strengthening the wellbore wall when using a water-based drilling fluid(WBF).The wellbore-strengthening performance was studied using the linear swelling test,hot-rolling recovery test,and compressive strength *** mechanism of strengthening the wellbore wall was studied by means of experiments on the zeta potential,particle size,contact angle,and surface tension,and with the use of a scanning electron microscope(SEM).The surface free energy changes of the shale before and after HNS treatment were also calculated using the contact angle *** experimental results showed that HNS exhibited a good performance in inhibiting shale swelling and *** with the use of water,the use of HNS resulted in a 20%smaller linear swelling height of the bentonite pellets and an 11.53 times higher recovery of water-sensitive shale—a performance that exceeds those of the commonly used shale inhibitors KCl and *** importantly,the addition of HNS was effective in preventing a decrease in shale *** to the mechanism study,the good wellbore-strengthening performance of HNS can be attributed to three ***,the positively charged HNS balances parts of the negative charges of clay by means of electrostatic adsorption,thus inhibiting osmotic ***,HNS fabricates a lotus-leaf-like surface with a micro-nano hierarchical structure on shale after adsorption,which significantly increases the water contact angle of the shale surface and considerably reduces the surface free energy,thereby inhibiting surface ***,the decrease in capillary action and the effective plugging of the shale pores reduce the invasion of water and promote wellbore *** approach described herein may provide an avenue for inhibiting both the surface hydration and the os

关键词： Hydrophobic Nanoparticle Shale inhibitor drilling fluid Wellbore stability

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Improved training framework in a neural network model for disruption prediction and its application on EXL-50

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Plasma Science and Technology 2024年第5期26卷 29-39页

作者：蔡剑青梁云峰 Alexander KNIEPS 齐东凯王二辉向皓明廖亮黄杰阳杰黄佳刘建文 Philipp drEWS 徐帅顾翔高轶琛罗宇李直 the EXL-50 team Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Cluster(TEC)Jülich 52425Germany ENN Science and Technology development Co. LtdLangfang 065001People’s Republic of China

A neural network model with a classical annotation method has been used on the EXL-50tokamak to predict impending ***,the results revealed issues of overfitting and overconfidence in predictions caused by inaccurate *** mitigate these issues,an improved training framework has been *** this approach,soft labels from previous training serve as teachers to supervise the further learning process;this has lead to a significant improvement in predictive model ***,this enhancement is primarily attributed to the coupling effect of the soft labels and correction *** improved training framework introduces an instance-specific label smoothing method,which reflects a more nuanced model assessment on the likelihood of a *** presents a possible solution to effectively address the challenges associated with accurate labeling across different machines.

关键词： neural network disruption soft label EXL-50 tokamak

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A multipath resource updating approach for distributed controllers in software-defined network.

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Science China(Information Sciences) 2016年第9期59卷 227-236页

作者： Xiaochun WU Chunming WU Changting LIN Qiang WU Bin WANG Computer Science College Zhejiang University Institute of Network and Communication Engineering Zhejiang Gongshang University ZTE Central r&d ZTE Corporation

Finding effective ways to collect the usage of network resources in all kinds of applications to ensure a distributed control plane has become a key requirement to improve the controller’s decision making *** paper explores an efficient way in combining dynamic Net View sharing of distributed controllers with the behavior of intra-service resource announcements and processing requirements that occur in distributed controllers, and proposes a rapid multipathing distribution mechanism. Firstly, we establish a resource collecting model and prove that the prisoner’s dilemma problem exists in the distributed resource collecting process in the Software-defined Network(SdN). Secondly, we present a bypass path selection algorithm and a diffluence algorithm based on Q-learning to settle the above dilemma. At last, simulation results are given to prove that the proposed approach is competent to improve the resource collecting efficiency by the mechanism of self-adaptive path transmission ratio of our approach, which can ensure high utilization of the total network we set up.

关键词： multipath Pareto optimal Q-learning

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Nitrogen-doped flower-like porous carbon materials directed by in situ hydrolysed MgO： Promising support for ru nanoparticles in catalytic hydrogenations

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Nano research 2016年第10期9卷 3129-3140页

作者： Mingming Li MinghuiTang Jiang deng Yong Wang Advanced Materials and Catalysis Group ZJU-NHU United R&D Center Department of Chemistry Zhejiang University Hangzhou310028 China

The development of novel simple, and convenient techniques for the fabrication of porous carbon materials with desirable properties, such as tunable pore structures and the presence of nitrogen functionalities, from renewable and abundant biomasses is required. We herein describe an in situ directing method for the preparation of a nitrogen-doped flower-like porous carbon （NFPC） employing arbitrarily shaped MgO from bio-derived glucosamine chloride （GAH）. Experimental evidence demonstrated that the structure directing effect of the Mg（OH）2 nanosheets formed in situ from MgO hydrolysis was key to this process, with the original MgO morphology being irrelevant. Furthermore, this method was applicable for a wide variety of biomass-derived carbon precursors. The resulting NFPC exhibited a high nitrogen content of 〈9 wt.%, and was employed as a support to anchor small ru nanoparticles （average size = 2.7 nm）. The resulting ru/NFPC was highly active in heterogeneous hydrogenations of toluene and benzoic acid, which demonstrated the advantages of nitrogen doping in terms of boosting catalytic performance.

关键词： nitrogen-doped porous carbon MgO in situ hydrolysis ruthenium aromatic hydrogenation

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ForSA — A New Software defined Network Architecture Based on ForCES

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China Communications 2016年第S1期13卷 16-31页

作者： LI Chuanhuang CEN Lijie GONG Liang WANG Weiming JIN rong LAN Julong School of Information and Electronic Engineering Zhejiang Gongshang University National digital Switching System Engineering & Technological r&d Center

In recent years, SdN(Software defined Network) as a new network architecture has become the hot research point. Meanwhile,the well-known Open Flow-based SdN got a lot of attention. But it can't provide a flexible and effective network resource description *** an open programmable technology, For CES(Forwarding and Control Element Separation)has also been concerned. However, For CES is confined within a single network node and cannot be applied to the entire network. This paper proposes a new architecture — ForS A(ForC ESbased SdN architecture). The architecture is added a configuration layer based on the traditional SdN architecture, which solves the problem that the northbound interface is not clear between the application layer and the control layer in the SdN architecture. ForS A also implements the compatibility within various forwarding devices in the forwarding layer.

关键词： software defined network ForCES SdN architecture

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research Progress in Improving the rate Performance of LiFePO_4 Cathode Materials

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Nano-Micro Letters 2014年第3期6卷 209-226页

作者： Sixu deng Hao Wang Hao Liu Jingbing Liu Hui Yan The College of Materials Science and Engineering Beijing University of Technology Chengdu Green Energy and Green Manufacturing Technology r&d Centre

Olivine lithium iron phosphate(Li Fe PO4) is considered as a promising cathode material for high power density lithium ion battery due to its high capacity, long cycle life, environmental friendly, low cost, and safety consideration. The theoretical capacity of Li Fe PO4 based on one electron reaction is 170 m Ah g-1at the stable voltage plateau of 3.5 V vs. Li/Li+. However, the instinct drawbacks of olivine structure induce a poor rate performance, resulting from the low lithium ion diffusion rate and low electronic *** this review, we summarize the methods for enhancing the rate performance of Li Fe PO4 cathode materials,including carbon coating, elements doping, preparation of nanosized materials, porous materials and composites,etc. Meanwhile, the advantages and disadvantages of above methods are also discussed.

关键词： LiFePO4 Lithium ion battery rate performance

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Absorption characteristics of new solvent based on a blend of AMP and 1,8-diamino-p-menthane for CO_2 absorption

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Journal of Environmental Sciences 2012年第5期24卷 897-902页

作者： Sang-Sup Lee Seong-Man Mun Won-Joon Choi Byoung-Moo Min Sang-Won Cho Kwang-Joong Oh department of Environmental Engineering Chungbuk National University department of Environmental Engineering Pusan National University Corporate r&d Institute Fuel Cell System Development Team Doosan Heavy Industries & Construction Greenhouse Gas research Center Korea Institute of Energy Research department of Energy and Environment Korea Polytechnic VII College

Aqueous 1,8-diamino-p-menthane （KIEr-C3） and commercially available amine solutions were tested for CO2 absorption. A 2-amino-2-methyl-1-propanol （AMP） solution with an addition of KIEr-C3 showed 9.3% and 31.6% higher absorption rate for CO2 than the AMP solution with an addition of monoethanolamine （MEA） and ammonia （NH3）, respectively. The reaction rate constant for CO2 absorption by the AMP/KIEr-C3 solution was determined by the following equation： k2,AMP/C3 = 7.702×106 exp （-2248.03/T）. A CO2 loading ratio of the AMP/KIEr-C3 solution was also 2 and 3.4-times higher than that of the AMP/NH3 solution and the AMP/MEA solution, respectively. Based on the experimental results, KIEr-C3 may be used as an excellent additive to increase CO2 absorption capability of AMP.

关键词： carbon dioxide absorption rate and capacity 1 8-diamino-p-menthane 2-amino-2-methyl-1-propanol

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Scenario-based verification in presence of variability using a synchronous approach

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Frontiers of Computer Science 2013年第5期7卷 650-672页

作者： Jean-Vivien MILLO Frederic MALLET Anthony COAdOU S rAMESH INrIA Sophia-Antipolis Aoste team (INRIA/I3S/CNRS/UNS) Sophia-Antipolis 06560 France University of Nice Sophia Antipolis Sophia-Antipolis 06900 France Global General Motors r&d India Science Lab GM Technical Center India Bangalore 560066 India

This paper presents a new model of scenarios, dedicated to the specification and verification of system be- haviours in the context of software product lines （SPL）. We draw our inspiration from some techniques that are mostly used in the hardware community, and we show how they could be applied to the verification of software components. We point out the benefits of synchronous languages and mod- els to bridge the gap between both worlds.

关键词： Esterel UML MArTE scenario verification,feature interaction variability

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AlGaN solar-blind phototransistor capable of directly detecting sub-fW signals:self-depletion and photorecovery of full-channel 2dEG enabled by a quasi-pseudomorphic structure

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光子学研究:英文版 2023年第7期11卷 1217-1226页

作者： JIABING LU ZESHENG lv HAO JIANG School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510006China Guangdong Engineering Technology r&d Center of Compound Semiconductors and devices Sun Yat-sen UniversityGuangzhou 510006China

Heterojunction field-effect phototransistors using two-dimensional electron gas(2dEG)for carrier transport have great potential in photodetection owing to its large internal gain.A vital factor in this device architecture is the depletion and recovery of the 2dEG under darkness and *** is usually achieved by adding an external gate,which not only increases the complexity of the fabrication and the electrical connection but also has difficulty ensuring low dark current(I_(dark)).Herein,a quasi-pseudomorphic AlGaN heterostructure is proposed to realize the self-depletion and photorecovery of the 2dEG,in which both the barrier and the channel layers are compressively strained,making the piezoelectric and spontaneous polarization reverse,thus depleting the 2dEG and tilting the entire barrier and channel band to form two built-in *** fabricated solar-blind phototransistors exhibit a very low I_(dark)below 7.1×10^(-10)mA∕mm,a superhigh responsivity(r)of 2.9×10^(9)A∕W,a record high detectivity(d^(*))of 4.5×10^(21)Jones,and an ultrafast response speed at the nanosecond *** high performance is attributed to the efficient depletion and recovery of the full 2dEG channel by the two photogates,enabling direct detection of the sub-fW *** work provides a simple,effective,and easily integrated architecture for carrier control and supersensitive photodetection based on polarization semiconductors.

关键词： channel polarization AlGaN

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Analysis of Center Wavelength Shift of VCSEL Light in AWG for WdM-PON Applications

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光子学报 2014年第7期43卷 30-33页

作者： do-WonKIM JaehoSONG GwangyongYI Technology research team Ericsson-LG R & D Center 77Heungan-daero 81beorrgil Dongarrgu Anyang-si Gyeonggi-do Korea

Center wavelength shift of vertical cavity surface emitting laser light in arrayed waveguide gratings is verified with mathematical and experimental *** is induced by the linearly increasing trend of optical power of vertical cavity surface emitting laser by bias current *** is retrieved effectively to the original center wavelength by simple correction method of *** was done for application of vertical cavity surface emitting laser as a light source in optical line terminal of wavelength division multiplexing-passive optical network.

关键词：激光器数学分析光功率波长

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