检索结果-南通市图书馆

Advances in Manufacturing 2023年第4期11卷 694-707页

作者： Feng Li Li Jia ya.gu College of Electrical and Information Engineering Jiangsu University of TechnologyChangzhou213001JiangsuPeople’s Republic of China School of Mechatronics Engineering and Automation Shanghai UniversityShanghai200444People’s Republic of China School of Electrical Engineering and Automation Changshu Institute of TechnologyChangshu215500JiangsuPeople’s Republic of China

In this study,a novel approach for nonlinear process identification via neural fuzzy-based Hammerstein-Wiener model with process disturbance by means of multi-signal processing is *** Hammerstein-Wiener model consists of three blocks where a dynamic linear block is sandwiched between two static nonlinear ***-signal sources are designed for achieving identification separation of the Hammerstein-Wiener *** correlation analysis theory is utilized for estimating unknown parameters of output nonlinearity and linear block using separable signals,thus the interference of process disturbance is ***,the immeasurable intermediate variable and immeasurable noise term in identification model is taken over by auxiliary model output and estimate residuals,and then auxiliary model-based recursive extended least squares parameter estimation algorithm is derived to calculate parameters of the input nonlinearity and noise ***,convergence analysis of the suggested identification scheme is derived using stochastic process *** simulation results indicate that proposed identification approach yields high identification accuracy and has good robustness.

关键词： Nonlinear process Parameter identification Hammerstein-Wiener model Neural fuzzy model Multiple signal processing

The Solutions of the Coupled Einstein-Maxwell Equations and Dilaton Equations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2018年第3期34卷 485-492页

作者： Rui-feng ZHANG ya.gu Institute of Contemporary Mathematics Henan University Kaifeng 475004 China School of Mathematics and Statistics Henan University Kaifeng 475004 China

In this paper, we consider extremely charged static perfect fluid distributions with a dilaton field in the framework of general relativity. By using calculus of variations, we establish the existence theorem for the solutions of this important gravitational system. We show that there is a continuous family of smooth solutions realizing asymptotically flat space metrics.

关键词： nonlinear elliptic equations the variational method the asymptotic estimates.

A Partial First-Order Affine-Scaling Method

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2019年第1期35卷 1-16页

作者： Ran gu ya Xiang YUAN Academy of Mathematics and Systems Science Chinese Academy of Sciences

We present a partial first-order affine-scaling method for solving smooth optimization with linear inequality constraints. At each iteration, the algorithm considers a subset of the constraints to reduce the complexity. We prove the global convergence of the algorithm for general smooth objective functions, and show it converges at sublinear rate when the objective function is quadratic. Numerical experiments indicate that our algorithm is efficient.

关键词： Linear inequality constraints affine scaling interior point

Biodegradation kinetic of organic compounds of acrylic fiber wastewater in biofilm

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2003年第6期15卷 757-761页

作者： ZHANG ya-lei ZHAO Jian-fu gu guo-wei State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China.

A group function relation curve between flux(J) and bulk phase concentration of substrate(S) was set up. The biodegradation kinetic of organic compounds of acrylic fiber wastewater in biofilm is studied(the treatment technology is coagulation/sedimentation-anoxic/aerobic biofilm process), and the results showed that the concentration of non-degradation pollutants in effluent is 77 mg/L. In aerobic zone, the half-rate constant is 72.84 mg/L, the maximum removal rate of organic compounds at unit area filler is very low, 0.089 g/(m 2·d), which corresponds to the fact that there are some biorefractory compounds in the wastewater.

关键词： acrylic fiber wastewater biodegradation kinetic organic compounds biofilm

Numerical simulation study on the mold strength of magnetic mold casting based on a coupled electromagnetic-structural method

在线全文

学校读者我要写书评

暂无评论

China Foundry 2024年第5期21卷 577-587页

作者： Wei-li Peng Jian-hua Zhao Cheng gu ya-jun Wang College of Materials Science and Engineering Chongqing UniversityChongqing 400045China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing 400044China

The properties of the magnetic mold in magnetic mold casting directly determine the quality of the final cast *** this study,the magnetic mold properties in magnetic mold casting,were studied utilizing a coupled electromagnetic-structural method through numerical *** study investigated key factors including equivalent stress,the distribution of tensile and compressive stresses,and the area ratio of tensile *** compared molds made entirely of magnetic materials with those made partially of magnetic *** results indicate that as current increases from 4 A to 8 A,both the initial magnetic mold and the material-replaced magnetic mold initially show an increasing trend in equivalent stress,tensile-compressive stress,and the area ratio of tensile stress,peaking at 6 A before *** material replacement,the area ratio of tensile stress at 6 A decreases to 19.84%,representing a reduction of 29.72%.Magnetic molds comprising a combination of magnetic and non-magnetic materials exhibit sufficient strength and a reduced area ratio of tensile stress compared to those made entirely from magnetic *** study provides valuable insights for optimizing magnetic mold casting processes and offers practical guidance for advancing the application of magnetic molds.

关键词： magnetic mold casting coupled electromagnetic-structural method numerical simulation stress analysis

Effect of confinement on the three-phase equilibrium of water-oil-CO_(2)mixtures in nanopores

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第1期19卷 203-210页

作者： Yi-Lei Song Shao-Hua gu Zhao-Jie Song Zhuo-ya Zhang Xu-ya Chang Jia guo State Key Laboratory of Petroleum Resources and Prospecting and Unconventional Petroleum Research Institute China University of Petroleum-BeijingBeijing102249China Sinopec Petroleum Exploration and Production Research Institute Beijing100083China

Accurate characterization of fluid phase behavior is an important aspect of CO_(2) enhanced shale oil *** far,however,there has been little discussion about the nanopore confinement effect,including adsorption and capillarity on the phase equilibrium of water-oil-CO_(2) *** this study,an improved three-phase flash algorithm is proposed for calculating the phase behavior of water-oil-gas mixture on the basis of an extended Young-Laplace equation and a newly developed fugacity calculation *** fugacity model can consider the effect of water-oil-gas adsorption on phase equilibrium.A water-Bakken oil-CO_(2) mixture is utilized to verify the accuracy of the flash algorithm and investigate the confinement *** show that the confinement effect promotes the transfer of all components in the vapor phase to other phases,while the transfer of water,CO_(2),and lighter hydrocarbons is more *** leads to a large decrease,a large increase,and a small increase in the mole fraction of the vapor,oleic,and aqueous phases,*** the confinement effect is considered,the density difference of vaporoleic phases decreases,and the interfacial tension of vapor-oleic phases decreases;however,the density difference of vapor-aqueous phases increases,the interfacial tension of vapor-aqueous phases still decreases.

关键词： Three-phase behavior Water-oil-CO_(2)mixtures Nanopore confinement CO_(2)enhanced oil recovery Shale reservoirs

Estrogen affects neuropathic pain through upregulating N-methyl-D-aspartate acid receptor 1 expression in the dorsal root ganglion of rats

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2017年第3期12卷 464-469页

作者： Chao Deng ya-juan gu Hong Zhang Jun Zhang Department of Anesthesiology First Affiliated HospitalSchool of MedicineShihezi UniversityShiheziXinjiang Uygur Autonomous RegionChina Department of Obstetrics and Gynecology First Affiliated HospitalSchool of MedicineShihezi UniversityShiheziXinjiang Uygur AutonomousRegionChina Department of Genetics School of MedicineShihezi UniversityShiheziXinjiang Uygur Autonomous RegionChina

Estrogen affects the generation and transmission of neuropathic pain,but the specific regulatory mechanism is still *** of the N-methyl-D-aspartate acid receptor 1（NMDAR1） plays an important role in the production and maintenance of hyperalgesia and *** present study was conducted to determine whether a relationship exists between estrogen and NMDAR1 in peripheral nerve pain.A chronic sciatic nerve constriction injury model of chronic neuropathic pain was established in *** rats were then subcutaneously injected with 17β-estradiol,the NMDAR1 antagonist D（-）-2-amino-5-phosphonopentanoic acid（AP-5）,or both once daily for 15 *** with injured drug na？ve rats,rats with chronic sciatic nerve injury that were administered estradiol showed a lower paw withdrawal mechanical threshold and a shorter paw withdrawal thermal latency,indicating increased sensitivity to mechanical and thermal *** administration was also associated with increased expression of NMDAR1 immunoreactivity（as assessed by immunohistochemistry） and protein（as determined by western blot assay） in spinal dorsal root *** 17β-estradiol-induced increase in NMDAR1 expression was blocked by co-administration with AP-5,whereas AP-5 alone did not affect NMDAR1 *** results suggest that 17β-estradiol administration significantly reduced mechanical and thermal pain thresholds in rats with chronic constriction of the sciatic nerve,and that the mechanism for this increased sensitivity may be related to the upregulation of NMDAR1 expression in dorsal root ganglia.

关键词： nerve regeneration peripheral nerve injury estrogen 17β-estradiol N-rnethyl-D-aspartic acid receptor 1 pain sciatic nerve chronic constriction injury neuropathic pain D(-)-2-amino-5-phosphonopentanoic acid dorsal root ganglion spinal cord immunoreactivity western blot assay neural regeneration

A structural comparison of measurement-based admission control algorithms

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2006年第3期13卷 81-86页

作者： gu Yi-ran WANG Suo-ping WU Hai-ya The College of Automation Nanjing University of Posts and TelecommunicationsNanjing 210003 China Ningbo Branch Co. Zhejiang Telecommunication Co. Ltd. Zhejiang ProvinceNingbo 315000 China

Measurement-based admission control （MBAC） algorithm is designed for the relaxed real-time service. In contrast to traditional connection admission control mechanisms, the most attractive feature of MBAC algorithm is that it does not require a prior traffic model and that is very difficult for the user to come up with a tight traffic model before establishing a flow. Other advantages of MBAC include that it can achieve higher network utilization and offer quality service to users. In this article, the study of the equations in the MBAC shows that they can all be expressed in the same form. Based on the same form, some MBAC algorithms can achieve same performance only if they satisfy some conditions.

关键词： connection admission control MBAC measurement process

New insights on linear cryptanalysis

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第1期63卷 104-114页

作者： Zhiqiang LIU Shuai HAN Qingju WANG Wei LI ya LIU Dawu gu Department of Computer Science and Engineering Shanghai Jiao Tong University State Key Laboratory of Cryptology School of Computer Science and Technology Donghua University Department of Computer Science and Engineering University of Shanghai for Science and Technology

Linear cryptanalysis is one of the most important cryptanalytic tools against block ciphers,thus modern block ciphers are always deliberately devised to avoid good long linear characteristics so as to resist linear cryptanalysis and its extensions. Differential-linear cryptanalysis, a powerful extension of linear cryptanalysis, has drawn much attention due to its applicability even in certain case that there is no good long linear characteristic of block ciphers. To further refine differential-linear cryptanalysis, we investigate the correlation distribution of differential-linear hull over random permutation and derive a concrete and concise correlation distribution accordingly. Theoretically, this could make differential-linear cryptanalysis more reasonable and precise. Moreover, the newly-proposed correlation distribution could lead to an interesting potential for improving the effectiveness of differential-linear cryptanalysis.

关键词： block cipher linear cryptanalysis differential-linear cryptanalysis correlation distribution key-dependent differential-linear hull

Concurrent tuberculous transverse myelitis and asymptomatic neurosyphilis:A case report

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第31期9卷 9645-9651页

作者： Lu-yan gu Jun Tian ya-Ping yan Department of Neurology Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009Zhejiang ProvinceChina

BACKGROUND Tuberculous myelitis is a rare manifestation of tuberculosis(TB)that is usually caused by hematogenous spread of Mycobacterium tuberculosis(MTB).Neurosyphilis is a neurological disease that occurs when Treponema pallidum invades the brain or the spinal ***,these two diseases involving the spinal cord are rare and cases of concurrent tuberculous transverse myelitis and asymptomatic neurosyphilis have seldom been *** SUMMARY A 56-year-old man presented with numbness and pain of both lower limbs for 2 wk and dysuria for 1 *** serology and cerebrospinal fluid(CSF)analysis supported the diagnosis of neurosyphilis and the patient was treated with intravenous ceftriaxone at first,but symptoms still ***,magnetic resonance images revealed multiple lesions along the cervicothoracic junction,and chest computed tomography showed a typical TB *** DNA was detected in the CSF sample by metagenomic next-generation *** the patient was diagnosed with tuberculous myelitis combined with asymptomatic ***,quadruple anti-TB drug standardized therapy was empirically used and his neurological symptoms improved *** Patients can have coinfection with tuberculous transverse myelitis and asymptomatic *** with neurosyphilis should be examined for other pathogens.

关键词： Tuberculous myelitis Neurosyphilis Metagenomic next-generation sequencing Case report