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Relationships between Diatom Abundances in Rat Organs and in Environmental Waters

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Current Medical Science 2021年第5期41卷 981-986页

作者： Liang REN Yi-qun CHEN qian-li ZHOU zun-zhong liu Ying LI Quan liu Department of Forensic Medicine Tongji Medical CollegeHuazhon^University of Science and TechnologyWuhan 430030China Hubei Key Laboratory of Forensic Science Hubei University of PoliceWuhan 430034China Guangdong Tongji Forensic Science Institute Foshan 516500China

Objective:A diagnosis of drowning remains one of the most challenging issues in forensic science,especially for decomposed *** analysis is considered as an encouraging method for diagnosing *** this study,we developed a drowned rat model using different diatom densities in ***:A total of 120 adult Sprague-Dawley rats were used and divided into six groups,wherein experimental groups 1-5 were drowned rats(group A)and postmortem submersion rats(group B)that were submerged in water with five different Cyclotella *** densities,while the remaining group was used as a blank *** combination of microwave digestion and vacuum filtration method was used to accomplish efficient tissue digestion and ascertain higher accuracy of diatom determinations within ***:The abundances of diatoms in the lungs,livers,and kidneys were significantly *** diatom abundances in the lungs,livers,and kidneys were directly proportional to the water diatom densities,and specific quantitative relationships could be approximated by separate regression equations for each organ ***,the trends associated with the diatom increases among organs slightly *** addition,the diatom abundances in the lungs,livers,and kidneys were all positively *** were not observed in the postmortem submersion groups nor in the blank control ***:The results of this study provide valuable information for establishing a quantitative diatom framework for informing future forensic medicine efforts.

关键词： drowning diatom test quantitative analysis lungs livers kidneys vacuum filtration

Multi-energy synergistic optimization in steelmaking process based on energy hub concept

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International Journal of Minerals,Metallurgy and Materials 2021年第8期28卷 1378-1386页

作者： Shuai liu Sheng Xie qi Zhang State Environmental Protection Key Laboratory of Eco-Industry Northeastern UniversityShenyang 110819China

The production process of iron and steel is accompanied by a large amount of energy production and consumption. Optimal scheduling and utilization of these energies within energy systems are crucial to realize a reduction in the cost, energy use, and CO_2 ***, it is difficult to model and schedule energy usage within steel works because different types of energy and devices are involved. The energy hub(EH), as a universal modeling frame, is widely used in multi-energy systems to improve its efficiency, flexibility, and *** paper proposed an efficient multi-layer model based on the EH concept, which is designed to systematically model the energy system and schedule energy within steelworks to meet the energy demand. Besides, to simulate the actual working conditions of the energy devices, the method of fitting the curve is used to describe the efficiency of the energy devices. Moreover, to evaluate the applicability of the proposed model, a case study is conducted to minimize both the economic operation cost and CO_2 emissions. The optimal results demonstrated that the model is suitable for energy systems within steel works. Further, the economic operation cost decreased by 3.41%, and CO_2 emissions decreased by approximately 3.67%.

关键词： multi-energy system energy hub optimization steel works

Random field characterization of uniaxial compressive strength and elastic modulus for intact rocks

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Geoscience Frontiers 2018年第6期9卷 1609-1618页

作者： Huaxin liu Xiaohui qi School of Civil and Environmental Engineering Nanyang Technological University

Rock properties exhibit spatial variabilities due to complex geological processes such as sedimentation,metamorphism, weathering, and tectogenesis. Although recognized as an important factor controlling the safety of geotechnical structures in rock engineering, the spatial variability of rock properties is rarely quantified. Hence, this study characterizes the autocorrelation structures and scales of fluctuation of two important parameters of intact rocks, i.e. uniaxial compressive strength(UCS) and elastic modulus(EM).UCS and EM data for sedimentary and igneous rocks are collected. The autocorrelation structures are selected using a Bayesian model class selection approach and the scales of fluctuation for these two parameters are estimated using a Bayesian updating method. The results show that the autocorrelation structures for UCS and EM could be best described by a single exponential autocorrelation function. The scales of fluctuation for UCS and EM respectively range from 0.3 m to 8.0 m and from 0.3 m to 8.4 *** results serve as guidelines for selecting proper autocorrelation functions and autocorrelation distances for rock properties in reliability analyses and could also be used as prior information for quantifying the spatial variability of rock properties in a Bayesian framework.

关键词： Uniaxial compressive strength Elastic modulus Scale of fluctuation Autocorrelation function Spatial variability Bayesian approach

Contact Processes on Scale-free Networks

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Acta Mathematica Sinica,English Series 2010年第7期26卷 1383-1392页

作者： Dayue CHEN qi liu LMAM School of Mathematical Sciences Peking University Beijing 100871 P. R. China

We investigate the contact process on random graphs generated from the configuration model for scale-free complex networks with the power law exponent β E （2, 3]. Using the neighborhood expansion method, we show that, with positive probability, any disease with an infection rate λ 〉 0 can survive for exponential time in the number of vertices of the graph. This strongly supports the view that stochastic scale-free networks are remarkably different from traditional regular graphs, such as, Z^d and classical Erdos-Renyi random graphs.

关键词： scale-free contact process random graph configuration model epidemics

Research of recognizing intelligence based on commanding decision-making

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Journal of Systems Engineering and Electronics 2006年第4期17卷 775-780页

作者： liu Jingxue Fei qi Inst. of Systems Engineering Huazhong Univ. of Science and Technology Wuhan 430074 P. R. China Wuhan Communication Command Coll. Wuhan 430010 P. R. China

In commanding decision-making, the commander usually needs to know a lot of situations（intelligence） on the adversary. Because of the military intelligence with opposability, it is inevitable that intelligence personnel take some deceptive information released by the rival as intelligence data in the process of intelligence gathering. Since the failure of intelligence is likely to lead to a serious aftereffect, the recognition of intelligence is a very important problem. An elementary research on recognizing military intelligence and puts forward a systematic processing method are made. First, the types and characteristics of military intelligence are briefly discussed, a research thought of recognizing military intelligence by means of recognizing military hypotheses are presented. Next, the reasoning mode and framework for recognizing military hypotheses are presented from the angle of psychology of intelligence analysis and non-monotonic reasoning. Then, a model for recognizing military hypothesis is built on the basis of fuzzy judgement information given by intelligence analysts. A calculative example shows that the model has the characteristics of simple calculation and good maneuverability. Last, the methods that selecting the most likely hypothesis from the survival hypotheses via final recognition are discussed.

关键词： psychology of intelligence analysis non-monotonic reasoning fuzzy judgement recognizing model D-S theory LOWA operator.

Some Abstract Critical Point Theorems for Self-adjoint Operator Equations and Applications

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Chinese Annals of Mathematics,Series B 2011年第1期32卷 1-14页

作者： Chungen liu qi WANG School of Mathematics and LPMC Nankai University Tianjin 300071 China School of Mathematics Nankai University Tianjin 300071 China

By using the index theory for linear bounded self-adjoint operators in a Hilbert space related to a fixed self-adjoint operator A with compact resolvent,the authors discuss the existence and multiplicity of solutions for(nonlinear) operator equations,and give some applications to some boundary value problems of first order Hamiltonian systems and second order Hamiltonian systems.

关键词： Self-adjoint operator equations Index theory Relative Morse index Dual variational method Morse theory Hamiltonian systems

Algorithm for multi-constrained path selection based on experimental analysis

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Journal of Systems Engineering and Electronics 2006年第4期17卷 931-937页

作者： qi Xiaogang liu Lifang liu Sanyang Dept. of Mathematics Science Xidian Univ. Xi'an 710071 P. R. China

It is a challenging problem to provide quality-of-service （QoS） guarantees in next generation high-speed network, and the QoS routing is one of the key issues of the problem. For the problem of multi-constrained QoS routing in high-speed network, especially under the inaccurate link state information, the success ratio of the different constraint combination is analyzed statistically, and a constraint analysis method based on the computer simulation is proposed. Furthermore, the approximately equal loose-tight order relation between each two constraints is constructed, and then an algorithm based on the experimental analysis is presented. Finally, the simulation result demonstrates that the algorithm has the higher success ratio, and the theoretical analysis proves its correctness and universality.

关键词： multi-constrained routing quality of service (QoS) path selection computer simulation experimental analysis

Chaotic Map-Based Authentication and Key Agreement Protocol with Low-Latency for Metasystem

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Computers, Materials & Continua 2024年第3期78卷 4471-4488页

作者： Guojun Wang qi liu School of Electronics&Information Engineering Nanjing University of Information Science&TechnologyNanjing210044China Yancheng Polytechnic College Yancheng224000China Jiangsu Province Engineering Research Center of Advanced Computing and Intelligent Services School of SoftwareNanjing University of Information Science and TechnologyNanjingChina

With the rapid advancement in exploring perceptual interactions and digital twins,metaverse technology has emerged to transcend the constraints of space-time and reality,facilitating remote AI-based *** this dynamic metasystem environment,frequent information exchanges necessitate robust security measures,with Authentication and Key Agreement(AKA)serving as the primary line of defense to ensure communication ***,traditional AKA protocols fall short in meeting the low-latency requirements essential for synchronous interactions within the *** address this challenge and enable nearly latency-free interactions,a novel low-latency AKA protocol based on chaotic maps is *** protocol not only ensures mutual authentication of entities within the metasystem but also generates secure session *** security of these session keys is rigorously validated through formal proofs,formal verification,and informal *** confronted with the Dolev-Yao(DY)threat model,the session keys are formally demonstrated to be secure under the Real-or-Random(ROR)*** proposed protocol is further validated through simulations conducted using VMware workstation compiled in HLPSL language and C *** simulation results affirm the protocol’s effectiveness in resisting well-known attacks while achieving the desired low latency for optimal metaverse interactions.

关键词： Metasystem authentication and key agreement chaotic map secure communication

Modeling and verifying chlorine decay and chloroacetic acid formation in drinking water chlorination

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Frontiers of Environmental Science & Engineering 2010年第1期4卷 65-72页

作者： Wenjun liu Shaoying qi Department of Environmental Science and Engineering Tsinghua UniversityBeijing 100084China Department of Civil&Environmental Engineering University of Illinois at Urbana-Champaign205 N.Mathews AvenueUrbanaIL 61801USA

This study presents a phenomenological model that can be used by the water professionals to quantify chlorine decay and disinfection byproduct(DBP)formation in *** kinetic model was developed by introducing the concept of limiting chlorine demand and extending an established reactive species *** limiting chlorine demand,which quantifies chlorine reactive natural organic matter(NOM)on an equivalent basis,was mathematically defined by the relation between ultimate chlorine residue and initial chlorine *** was found experimentally that NOM in water has limiting chlorine demand that increases with chlorine dose once the ultimate residue is *** results indicated that the complex NOM has a unique ability to adjust chemically to the change in redox condition caused by the free *** is attributed mainly to the redundant functional groups that persist in heterogeneous NOM *** results also demonstrated that the effect of chlorine dose on the rate of chlorine decay can be quantitatively interpreted with the limiting chlorine *** kinetic model developed was validated for chlorine decay and chloroacetic acid formation in finished drinking water.

关键词： chlorine demand chlorine decay chloroacetic acids disinfection byproducts model