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Mining Science and Technology 2010年第2期20卷 188-192页

作者： wang, Haifeng CHENG, Yuanping YUAN, liang wang, liang national engineering research center for coal & gas control china university of mining & technologyxuzhou 221008china huainan mining industry (group) limited liability company postdoctoral science research workstationhuainan 232046china

For a study of the movement and deformation of coal-rock mass and low protected seams below a stope,as well as for fracture developments and rules of evolution of permeability,we designed a plane strain model test stand to carry out model tests of similar materials in order to improve the effect of gas drainage from low protected seams and to measure the movement and deformation of coal-rock mass using a method of non-contact close-range *** results show that 1) using paraffin melting to take the place of coal seam mining can satisfy the mining conditions of a protective seam;2) coal-rock mass under goafs has an upward movement after the protective seam has been mined,causing floor heaving;3) low protected seams become swollen and deformed,providing a good pressure-relief effect and causing the coal-rock mass under both sides of coal pillars to become deformed by compression and 4) the evolution of permeability of low protected seams follows the way of initial values→a slight decrease→a great increase→stability→final ***,the coefficient of air permeability increased at a decreasing rate with an increase in interlayer spacing.

关键词： coal-rock mass below stope low protected seam plane strain similar model test

NF_3 decomposition over Al_2O_3 reagents without water

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Journal of Natural Gas Chemistry 2011年第4期20卷 418-422页

作者： Xiufeng Xu liang Sun Yanan wang School of Chemistry and Biology Yantai University Yantai 264005 Shandong China

Several Al2O3 samples were prepared by a precipitation method coupled with ultrasonic treatment,and NF3 decomposition without water over Al2O3 reagents is carried *** effect of preparation parameters of Al2O3 reagents,such as precipitating agents,structure directing agents,and calcining temperatures on their reactivity for NF3 decomposition has been *** results show that NF3 can be decomposed completely at 400-C,and full conversion of NF3 maintains 580 min over the best Al2O3 reagent,calcined at 600-C which was prepared using both PEG-2000 and Tween-60 as structure directing agents,ammonia as a precipitating agent.

关键词： NF3 decomposition without water Al2O3 preparation parameters reactivity

PokerNet:Expanding Features Cheaply via Depthwise Convolutions

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International Journal of Automation and computing 2021年第3期18卷 432-442页

作者： Wei Tang Yan Huang liang wang National Laboratory of Pattern Recognition(NLPR) Institute of AutomationChinese Academy of SciencesBeijing 100190China Center for Research on Intelligent Perception and Computing(CRIPAC) Institute of AutomationChinese Academy of SciencesBeijing 100190China

Pointwise convolution is usually utilized to expand or squeeze features in modern lightweight deep ***,it takes up most of the overall computational cost(usually more than 90%).This paper proposes a novel Poker module to expand features by taking advantage of cheap depthwise *** a result,the Poker module can greatly reduce the computational cost,and meanwhile generate a large number of effective features to guarantee the *** proposed module is standardized and can be employed wherever the feature expansion is *** varying the stride and the number of channels,different kinds of bottlenecks are designed to plug the proposed Poker module into the ***,a lightweight model can be easily *** conducted on benchmarks reveal the effectiveness of our proposed Poker *** our Poker Net models can reduce the computational cost by 7.1%-15.6%.Poker Net models achieve comparable or even higher recognition accuracy than previous state-of-the-art(SOTA)models on the Image Net ILSVRC2012 classification *** is available at https://***/diaomin/pokernet.

关键词： Deep learning depthwise convolution lightweight deep model model compression model acceleration

Experimental study of the temporary plugging capability of diverters to block hydraulic fractures in high-temperature geothermal reservoirs

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Petroleum Science 2023年第6期20卷 3687-3699页

作者： Dao-Bing wang Hao Qin Yong-liang wang Jian-Qiao Hu Dong-liang Sun Bo Yu School of Mechanical Engineering Beijing Institute of Petrochemical TechnologyBeijing102617China Jinan Branch China Petroleum and Chemical CorporationJinan250101ShandongChina School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing100083China LNM Institute of MechanicsChinese Academy of SciencesBeijing100190China

The effective plugging of artificial fractures is key to the success of temporary plugging and diverting fracturing technology,which is one of the most promising ways to improve the heat recovery efficiency of hot dry *** present,how temporary plugging agents plug artificial fractures under high temperature remains *** this paper,by establishing an improved experimental system for the evaluation of temporary plugging performance at high temperature,we clarified the effects of high temperature,injection rate,and fracture width on the pressure response and plugging efficiency of the *** results revealed that the temporary plugging process of artificial fractures in hot dry rock can be divided into four main stages:the initial stage of temporary plugging,the bridging stage of the particles,the plugging formation stage,and the high-pressure dense plugging *** the temperature increases,the distribution distance of the temporary plugging agent,the number of pressure fluctuations,and the time required for crack plugging ***,when the temperature increases by 100℃,the complete plugging time increases by 90.7%.

关键词： High temperature Diverter material Fracture plugging capability Hydraulic fracturing Experimental study

Inference for dependence competing risks from bivariate exponential model under generalized progressive hybrid censoring with partially observed failure causes

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Journal of Systems Engineering and Electronics 2019年第1期30卷 201-208页

作者： wang liang LI Huanyu MA Jin'ge School of Mathematics and Statistics Xidian University

Inference are considered for the dependence competing risks model by using the Marshal-Olkin bivariate exponential distribution. Under generalized progressively hybrid censoring with partially observed failure causes, the maximum likelihood estimators are established, and the approximate confidence intervals are also constructed via the observed Fisher information ***, Bayes estimates and highest probability density credible intervals are presented and the importance sampling technique is used to compute corresponding results. Finally, the numerical analysis is proposed for illustration.

关键词： dependence competing risk generalized progressive hybrid censoring bivariate exponential distribution Bayesian inference.

Copper-Catalyzed Cyanations of Aromatic Bromides with Benzoyl Cyanide

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Chinese Journal of Chemistry 2014年第12期32卷 1221-1224页

作者： liang wang liang Pan Qun Chen Mingyang He School of Petrochemical Engineering Changzhou UniversityChangzhouJiangsu 213164China

Aromatic nitriles were synthesized through copper-catalyzed cyanations of aromatic bromides using benzoyl cyanide as the cyanide source.A series of functional groups were tolerated under the reaction conditions to provide the products in good ***,this protocol avoids using of highly toxic alkali cyanides and expensive palladium catalysts.

关键词： nitriles aromatic bromides benzoyl cyanide copper-catalysis cyanation

Single-Molecule Measurement of Carbonic Anhydrase in Cation Coordinated Environment Using MspA Nanopore

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Chinese Journal of Chemistry 2023年第11期41卷 1341-1347页

作者： Dandan Song Yunjiao wang Shaoxia Zhang Lingyu Zhao Linyu Gong Liyuan liang liang wang School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing400065 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences & Chongqing SchoolUniversity of Chinese Academy of SciencesChongqing400714 China

Carbonic anhydrase accounts for catalytic reaction of CO_(2)/HCO_(3)^(–) transformation, thus resulting in neutralization and acidification of the cellular environment, thereby favoring tumor development. Hence, it is a classical protein model of greatly biocatalytic significance as well as a highly expressed biomarker with renal tumor. We herein proposed a single-molecule measurement on carbonic anhydrase using MspA nanopore, in [BMIM+] and asymmetric K^(+)/Ca^(2+) cationic coordinated environment, instead of usual symmetric KCl/NaCl electrolyte. Significantly, our empirical analysis showed that asymmetric K^(+)/Ca^(2+) cationic environment contributes to distinguishable current modulations, thus yielding better resolution for carbonic anhydrase measurement, which is independent of applied voltage and more importantly, is stable enough at varied pH conditions and for very low concentration test in urine sample. Our results provide a classical model for nanopore protein analysis, and may also permit biocatalytic measurement at single-molecule level.

关键词： Carbonic anhydrase Nanopore biosensing Biocatalytic biophysical analysis Cation coordinated environment Renal tumorbiomarker Proteinmodel lonicchannel

Approach to Calculating Methods of Wave Breaking Depth and Height

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China Ocean Engineering 1993年第1期8卷 85-98页

作者： wang, liang Du, Heng Hohai Univ Nanjing China

Engineers in coastal engineering have been paying much attention to the research subject on wave breaking. In this paper, previous research results on the calculating methods of wave breaking depth and height are enumerated, the laws of wave transformation before and after wave breaking are investigated, an adequate supposition is made, and the effect of beach slope, bed friction and breaking turbulence on wave breaking is considered. By applying the theory of wave energy dissipation rate and combining with proper formulas of solitary waves, a new calculating formula of wave breaking depth and height on the movable bed is derived and examined with the data from experimental pools of different sizes, and it is proved to be of practicability.

关键词： Energy dissipation Friction Numerical methods Turbulence

Recent advancements toward non-invasive imaging of retinal amyloid-beta for early detection of Alzheimer’s disease

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Neural Regeneration Research 2022年第8期17卷 1741-1742页

作者： liang wang Xiaobo Mao University of Miami Miller School of Medicine MiamiFLUSA Neuroregeneration and Stem Cell Programs Institute for Cell EngineeringDepartment of NeurologyJohns Hopkins University School of MedicineBaltimoreMDUSA

Alzheimer’s disease(AD)is a neurodegenerative disorder characterized by progressive cognitive impairment suggested to be induced by the accumulation of amyloid-β(Aβ)in the brain,especially in the *** Aβdeposits may be detected through positron emission tomography(PET)as early as two decades before clinically diagnosed AD-associated dementia,which provides the opportunity for early therapeutic interventions(wang and Mao,2021).PET may not be suitable for AD screening since it is invasive,costly,and inaccessible for routine clinical use or population screening.Aβdeposits have also been identified throughout the retina,which is a developmental outgrowth of the diencephalon and shares physiological and pathological pathways with the central nervous system(London et al.,2013).Patients with mild cognitive impairment and early AD are reported to have visual disturbances involving visual field loss with reported thinning of the retinal layers including the retinal nerve fiber layer,ganglion cell layer,and inner plexiform layer(Koronyo-Hamaoui et al.,2011;wang and Mao,2021).Retinal Aβdeposits have been detected prior to the manifestation of cerebral Aβdeposits in transgenic mice models of AD(Koronyo-Hamaoui et al.,2011;Habiba et al.,2021).Since the retina provides an easily accessible location for non-invasive imaging,retinal Aβmay have the potential to be a surrogate for cerebral Aβand a biomarker for the detection of AD prior to irreversible cognitive impairment.

关键词： amyloid Alzheimer routine