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New Bounds of the Infinity Norm of the Inverse of GS-SDD Matrices with Their Applications 认领 引用
1
作者 DUAN Wei-ting WEN De-kun +1 位作者 HUI Min WANG Ya-qiang 《Chinese Quarterly Journal of Mathematics》 2026年第2期184-196,共13页
In this paper, we present a new bound of the infinity norm of inverse of GS-SDD matrices. Meanwhile, a new error bound for the linear complementarity problem(LCP) of GS-SDD matrices is given, which depends only on the... In this paper, we present a new bound of the infinity norm of inverse of GS-SDD matrices. Meanwhile, a new error bound for the linear complementarity problem(LCP) of GS-SDD matrices is given, which depends only on the entries of the involved matrices. In addition, some numerical examples are given to illustrate the corresponding results. 展开更多
关键词 GS-SDD matrices Infinity norm Linear complementarity problem
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Sharp Bounds for Upper and Bottom Spectrum of Hermitizable Tridiagonal Matrices 认领 引用
2
作者 Yueshuang LI Lingdi WANG 《Journal of Mathematical Research with Applications》 CSCD 2025年第1期125-132,共8页
We display sharp bounds for upper and lower spectrum of a Hermitizable tridiagonal matrix.The representations are brought to light by exploiting the characteristic for eigenpairs(eigenvalue and its corresponding eigen... We display sharp bounds for upper and lower spectrum of a Hermitizable tridiagonal matrix.The representations are brought to light by exploiting the characteristic for eigenpairs(eigenvalue and its corresponding eigenvector)of tridiagonal matrices,isospectral transforms and sharp bounds for speed stability of birth-death processes. 展开更多
关键词 Hermitizable matrix isospectral matrices upper and bottom spectrum
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Error Bounds for Linear Complementarity Problem of SDDkMatrices 认领 引用
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作者 Kexin Zhang Min Hui Yaqiang Wang 《Communications in Mathematical Research》 CSCD 2025年第4期331-353,共23页
SDDkmatrices are a subclass of the nonsingular H-matrices.The infinity norm of the inverse for SDDkmatrices has been given.In the paper,we utilize this result in the context of the linear complementarity problem... SDDkmatrices are a subclass of the nonsingular H-matrices.The infinity norm of the inverse for SDDkmatrices has been given.In the paper,we utilize this result in the context of the linear complementarity problem,and the error bounds of the linear complementarity problem for SDDkmatrices are obtained.By the relationship between the SDD matrices and the SDDkmatrices,we further obtain the error bounds of the linear complementarity problem for SDD matrices.In addition,it is proved that the bounds presented in this paper are sharper than the well-known bounds under some conditions.Finally,numerical examples are provided to demonstrate the effectiveness of our results. 展开更多
关键词 Linear complementarity problem error bound SDDkmatrices SDD matrices
Bounds for Polynomial’s Roots from Fiedler and Sparse Companion Matrices for Submultiplicative Matrix Norms 认领 引用 被引量：1
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作者 Mamoudou Amadou Bondabou Ousmane Moussa Tessa Amidou Morou 《Advances in Linear Algebra & Matrix Theory》 2021年第1期1-13,共13页
We use submultiplicative companion matrix norms to provide new bounds for roots for a given polynomial P(X) over the field C[X]. From a n×n Fiedler companion matrix C, sparse companion matrices and triangular Hes... We use submultiplicative companion matrix norms to provide new bounds for roots for a given polynomial P(X) over the field C[X]. From a n×n Fiedler companion matrix C, sparse companion matrices and triangular Hessenberg matrices are introduced. Then, we identify a special triangular Hessenberg matrix Lr, supposed to provide a good estimation of the roots. By application of Gershgorin’s theorems to this special matrix in case of submultiplicative matrix norms, some estimations of bounds for roots are made. The obtained bounds have been compared to known ones from the literature precisely Cauchy’s bounds, Montel’s bounds and Carmichel-Mason’s bounds. According to the starting formel of Lr, we see that the more we have coefficients closed to zero with a norm less than 1, the more the Sparse method is useful. 展开更多
关键词 Fiedler Matrices Polynomial’s Roots Bounds for Polynomials Companion Matrices Sparse Companion Matrices Hessenberg Matrices Submultiplicative Matrix Norm
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Real pairwise completely positive matrices 认领 引用
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作者 ZHOU Anwa HE Jiayi 《运筹学学报（中英文）》 CSCD 北大核心 2025年第3期160-178,共19页
In this paper,we introduce the real pairwise completely positive(RPCP)matrices with one of them is necessarily positive semidefinite while the other one is necessarily entrywise nonnegative,which has a real pairwise c... In this paper,we introduce the real pairwise completely positive(RPCP)matrices with one of them is necessarily positive semidefinite while the other one is necessarily entrywise nonnegative,which has a real pairwise completely positive(RPCP)decomposition.We study the properties of RPCP matrices and give some necessary and sufficient conditions for a matrix pair to be RPCP.First,we give an equivalent decomposition for the RPCP matrices,which is different from the RPCP-decomposition and show that the matrix pair(X,X)is RPCP if and only if X is completely positive.Besides,we also prove that the RPCP matrices checking problem is equivalent to the separable completion problem.A semidefinite algorithm is also proposed for detecting whether or not a matrix pair is RPCP.The asymptotic and finite convergence of the algorithm are also discussed.If it is RPCP,we can further give a RPCP-decomposition for it;if it is not,we can obtain a certificate for this. 展开更多
关键词 real pairwise completely positive matrices truncated moment problem semidefinite relaxation
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Extensions of the Graham-Hoffman-Hosoya Type Theorems for the Exponential Distance Matrices and q-Distance Matrices 认领 引用
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作者 Jie WANG 《Journal of Mathematical Research with Applications》 CSCD 2024年第6期723-734,共12页
Let G be a strongly connected directed weighted graph with vertex set{v1,v2,...,vn},in which each edge e is assigned with an arbitrary nonzero weight w(e).For any two vertices v_i,v_(j )of G,the distance d_(i... Let G be a strongly connected directed weighted graph with vertex set{v1,v2,...,vn},in which each edge e is assigned with an arbitrary nonzero weight w(e).For any two vertices v_i,v_(j )of G,the distance d_(ij )from vito vjis defined as dij=P∈P(vi,vj)min∑w(e) where P(vi,vj) denotes the set consisting of all the directed paths from vito vjin G.Given a nonzero indeterminant q,following the definitions from Yan and Yeh (Adv.Appl.Math.,2007),and Bapat et al.(Linear Algebra Appl.,2006),one can define the exponential distance matrix of G as FqG=(qdij)n×n,and define the q-distance matrix of G as DGq=(dijq)n×nwith dijq={1-qdij/1-q,if q≠1,dij,if q=1,extending the original definitions only for the undirected unweighted connected graphs.One of the remarkable results about the distance matrices of graphs is due to the Graham-HoffmanHosoya theorem (J.Graph Theory,1977).In this paper,we present some Graham-HoffmanHosoya type theorems for the exponential distance matrix FGqand q-distance matrix DGq,extending all the known Graham-Hoffman-Hosoya type theorems. 展开更多
关键词 distance matrices exponential distance matrices q-distance matrices determinants cofactors cofactor sums
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Solving type-2 fuzzy relation equations via semi-tensor product of matrices 认领 引用 被引量：12
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作者 Yongyi YAN Zengqiang CHEN Zhongxin LIU 《Control Theory and Technology》 EI CSCD 2014年第2期173-186,共14页
The problem of solving type-2 fuzzy relation equations is investigated. In order to apply semi-tensor product of matrices, a new matrix analysis method and tool, to solve type-2 fuzzy relation equations, a type-2 fuzz... The problem of solving type-2 fuzzy relation equations is investigated. In order to apply semi-tensor product of matrices, a new matrix analysis method and tool, to solve type-2 fuzzy relation equations, a type-2 fuzzy relation is decomposed into two parts as principal sub-matrices and secondary sub-matrices; an r-ary symmetrical-valued type-2 fuzzy relation model and its corresponding symmetrical-valued type-2 fuzzy relation equation model are established. Then, two algorithms are developed for solving type-2 fuzzy relation equations, one of which gives a theoretical description for general type-2 fuzzy relation equations; the other one can find all the solutions to the symmetrical-valued ones. The results can improve designing type-2 fuzzy controllers, because it provides knowledge to search the optimal solutions or to find the reason if there is no solution. Finally some numerical examples verify the correctness of the results/algorithms. 展开更多
关键词 Fuzzy control system Type-2 fuzzy logic system Type-2 fuzzy relation Type-2 fuzzy relation equation Semi- tensor product of matrices
E-matrices and Several Necessary and Sufficient Conditions 认领 引用
8
作者 王淑玉 《Chinese Quarterly Journal of Mathematics》 1997年第2期58-61,共4页
In this paper,we define a kind of sguare matrices which is called E-matrices,and give several necessary and sufficient conditions for E-matrices.
关键词 positive matrices nonnegative matrices E-matrices spectral radius ordinal main subdeterminants
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Highly Aligned Ternary Nanofiber Matrices Loaded with MXene Expedite Regeneration of Volumetric Muscle Loss 认领 引用 被引量：4
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作者 Moon Sung Kang Yeuni Yu +5 位作者 Rowoon Park Hye Jin Heo Seok Hyun Lee Suck Won Hong Yun Hak Kim Dong‑Wook Han 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第4期269-292,共24页
Current therapeutic approaches for volumetric muscle loss(VML)face challenges due to limited graft availability and insufficient bioactivities.To overcome these limitations,tissue-engineered scaffolds have emerged as ... Current therapeutic approaches for volumetric muscle loss(VML)face challenges due to limited graft availability and insufficient bioactivities.To overcome these limitations,tissue-engineered scaffolds have emerged as a promising alternative.In this study,we developed aligned ternary nanofibrous matrices comprised of poly(lactide-co-ε-caprolactone)integrated with collagen and Ti3C2TxMXene nanoparticles(NPs)(PCM matrices),and explored their myogenic potential for skeletal muscle tissue regeneration.The PCM matrices demonstrated favorable physicochemical properties,including structural uniformity,alignment,microporosity,and hydrophilicity.In vitro assays revealed that the PCM matrices promoted cellular behaviors and myogenic differentiation of C2C12 myoblasts.Moreover,in vivo experiments demonstrated enhanced muscle remodeling and recovery in mice treated with PCM matrices following VML injury.Mechanistic insights from next-generation sequencing revealed that MXene NPs facilitated protein and ion availability within PCM matrices,leading to elevated intracellular Ca2+levels in myoblasts through the activation of inducible nitric oxide synthase(i NOS)and serum/glucocorticoid regulated kinase 1(SGK1),ultimately promoting myogenic differentiation via the m TOR-AKT pathway.Additionally,upregulated i NOS and increased NO–contributed to myoblast proliferation and fiber fusion,thereby facilitating overall myoblast maturation.These findings underscore the potential of MXene NPs loaded within highly aligned matrices as therapeutic agents to promote skeletal muscle tissue recovery. 展开更多
关键词 Ti3C2TxMXene nanoparticle Ternary nanofibrous matrices Myogenesis Regeneration of volumetric muscle loss Next generation sequencing
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Real-time origin-destination matrices estimation for urban rail transit network based on structural state-space model 认领 引用 被引量：3
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作者 姚向明 赵鹏 禹丹丹 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第11期4498-4506,共9页
The major objective of this work was to establish a structural state-space model to estimate the dynamic origin-destination(O-D) matrices for urban rail transit network, using in- and out-flows at each station from au... The major objective of this work was to establish a structural state-space model to estimate the dynamic origin-destination(O-D) matrices for urban rail transit network, using in- and out-flows at each station from automatic fare collection(AFC) system as the real time observed passenger flow counts. For lacking of measurable passenger flow information, the proposed model employs priori O-D matrices and travel time distribution from historical travel records in AFC system to establish the dynamic system equations. An arriving rate based on travel time distribution is defined to identify the dynamic interrelations between time-varying O-D flows and observed flows, which greatly decreases the computational complexity and improve the model's applicability for large-scale network. This methodology is tested in a real transit network from Beijing subway network in China through comparing the predicted matrices with the true matrices. Case study results indicate that the proposed model is effective and applicative for estimating dynamic O-D matrices for large-scale rail transit network. 展开更多
关键词 dynamic origin-destination matrices estimation sta
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Generalized Drazin spectrum of operator matrices 认领 引用 被引量：4
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作者 ZHANG Shi-fang ZHONG Huai-jie LIN Li-qiong 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2014年第2期162-170,共9页
Let A ∈ B（X） and B ∈ B（Y）, Me be an operator on Banach space X ＋ Y given by Mc =（A C 0 B）A generalized Drazin spectrum defined by σgD（T） = {λ∈C ： T-λI is not generalized Drazin invertible} is considere... Let A ∈ B（X） and B ∈ B（Y）, Me be an operator on Banach space X ＋ Y given by Mc =（A C 0 B）A generalized Drazin spectrum defined by σgD（T） = {λ∈C ： T-λI is not generalized Drazin invertible} is considered in this paper. It is shown that 展开更多
关键词 operator matrices generalized Drazin spectrum filling-in-hole problem.
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Construction of protograph LDPC codes with circular generator matrices 认领 引用 被引量：5
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作者 Kaiyao Wang Yang Xiao Kiseon Kim 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2011年第5期840-847,共8页
The application of protograph low density parity check （LDPC） codes involves the encoding complexity problem. Since the generator matrices are dense, and if the positions of ＂1＂ s are irregularity, the encoder nee... The application of protograph low density parity check （LDPC） codes involves the encoding complexity problem. Since the generator matrices are dense, and if the positions of ＂1＂ s are irregularity, the encoder needs to store every ＂1＂ of the generator matrices by using huge chip area. In order to solve this problem, we need to design the protograph LDPC codes with circular generator matrices. A theorem concerning the circulating property of generator matrices of nonsingular protograph LDPC codes is proposed. The circulating property of generator matrix of nonsingular protograph LDPC codes can be obtained from the corresponding quasi-cyclic parity check matrix. This paper gives a scheme of constructing protograph LDPC codes with circulating generator matrices, and it reveals that the fast encoding algorithm of protograph LDPC codes has lower encoding complexity under the condition of the proposed theorem. Simulation results in ad- ditive white Gaussian noise （AWGN） channels show that the bit error rate （BER） performance of the designed codes based on the proposed theorem is much better than that of GB20600 LDPC codes and Tanner LDPC codes. 展开更多
关键词 protograph low density parity check （LDPC） codes cyclic matrices fast encoding algorithm bit error rate （BER） performance.
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Formulation and evaluation the bioadhesive properties of drug delivery system based on PEGylated mucin matrices 认领 引用 被引量：3
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作者 Momohmumuni Audu Adikwu Michael Umale Ibezim Emmanuel Chinnedu 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2010年第6期461-464,共4页
Objective:To formulate and evaluate the application of PEGylated mucin in oral bioadhesive drug(OBD) delivery system.Methods:The bioadhesive strength of different formulation ratios of polyethylene glycol(PEG) and muc... Objective:To formulate and evaluate the application of PEGylated mucin in oral bioadhesive drug(OBD) delivery system.Methods:The bioadhesive strength of different formulation ratios of polyethylene glycol(PEG) and mucin was evaluated by tensiometry.Co polymer matrices containing mucin and PEG(PEGylated mucin) in the following ratios of 1:1(A),2:1(B),1:2(C), 0:1(D) and 1:0(E) were prepared by co-precipitation.Microparticles were prepared from the matrices using a size reduction technique.Five different samples were prepared using direct mixtures in the appropriate solvenfs having mucin and PEG ratios of 1:1,2:1,1:2,0:1, 1:0 and labeled as(A-E).The matrices were evaluated for their flow properties and the in vitro bioadhesion characteristics of the samples were examined.Results:The range of flow rates of the matrices was 1.35-2.23 g/sec.The angle of repose was in the range of 37.3-39.9 degree.The bulk and tapped densities were within the ranges of 0.41- 0.49.The Hausner’s quotient(HQ) were 1.12, 1.24,1.14,1.25 and 1.2 for matrix batches A-E respectively,The bioadhesive strength of polymer matrices appeared to be directly related to amount of mucin.The order of bioadhesive strength is 2:1】1:1】1:0】1:2】0:1 of PEG:mucin in both simulated intestine fluid(SEP) and simulated gastrointestinal fluid(SGF).The physical properties of the micrometrics properties of the matrices were within the accepted values.Conclusions:OBD preparation containing PEGylated mucin can be prepared by direct compression and be used in drug delivery to the oral cavity. 展开更多
关键词 PEGylated Mucus Delivery Matrices
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Benzodiazepines in complex biological matrices: Recent updates on pretreatment and detection methods 认领 引用 被引量：1
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作者 Yi-Xin Zhang Yuan Zhang +5 位作者 Yu Bian Ya-jie Liu Ai Ren Yu Zhou Du Shi Xue-Song Feng 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2023年第5期442-462,共21页
Benzodiazepines(BDZs)are used in clinics for anxiolysis,anticonvulsants,sedative hypnosis,and muscle relaxation.They have high consumptions worldwide because of their easy availability and potential addiction.They are... Benzodiazepines(BDZs)are used in clinics for anxiolysis,anticonvulsants,sedative hypnosis,and muscle relaxation.They have high consumptions worldwide because of their easy availability and potential addiction.They are often used for suicide or criminal practices such as abduction and drug-facilitated sexual assault.The pharmacological effects of using small doses of BDZs and their detections from complex biological matrices are challenging.Efficient pretreatment methods followed by accurate and sensitive detections are necessary.Herein,pretreatment methods for the extraction,enrichment,and preconcentration of BDZs as well as the strategies for their screening,identification,and quantitation developed in the past five years have been reviewed.Moreover,recent advances in various methods are summarized.Characteristics and advantages of each method are encompassed.Future directions of the pretreatment and detection methods for BDZs are also reviewed. 展开更多
关键词 Benzodiazepine Biological matrices Detectionmethods Samplepreparation
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Study on a New Method of Extraction of Metal Ions from SolidMatrices by Supercritical Fluid 认领 引用 被引量：1
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作者 Zhao Jie CUI Jun Cheng LIU +2 位作者 Lain Cun GAO Ying Qin WEI Jun Zeng ZHANG 《Chinese Chemical Letters》 SCIE CAS 1999年第6期525-528,共4页
8-Hydroxyquinoline, methanol and Triton-100 were first used together in the extraction of metal ions by supercritical CO2. In the new system, the effects of pressure, temperature and the volume of CO2 on the efficienc... 8-Hydroxyquinoline, methanol and Triton-100 were first used together in the extraction of metal ions by supercritical CO2. In the new system, the effects of pressure, temperature and the volume of CO2 on the efficiency of supercritical fluid extraction (SFE) were systematically investigated. The recovery under the optimum condition was only 11.38%, but if suitable concentration of methanol (v/v=5%) was added to the supercritical CO2, the recovery was increased significantly (83.60%, RSD=4.37%, n=5). In order to further enhance the recovery Triton X-100 was added to the samples, and the results were satisfactory (96.62%, RSD=2.85%, n=5). 展开更多
关键词 supercritical fluid extraction chelating agent modifier surfactant metal ions solid matrices
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APPLICATIONS OF STAIR MATRICES AND THEIR GENERALIZATIONS TO ITERATIVE METHODS 认领 引用 被引量：1
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作者 邵新慧 沈海龙 李长军 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2006年第8期1115-1121,共7页
Stair matrices and their generalizations are introduced. The definitions and some properties of the matrices were first given by Lu Hao. This class of matrices provide bases of matrix splittings for iterative methods.... Stair matrices and their generalizations are introduced. The definitions and some properties of the matrices were first given by Lu Hao. This class of matrices provide bases of matrix splittings for iterative methods. The remarkable feature of iterative methods based on the new class of matrices is that the methods are easily implemented for parallel computation. In particular, a generalization of the accelerated overrelaxation method （GAOR） is introduced. Some theories of the AOR method are extended to the generalized method to include a wide class of matrices. The convergence of the new method is derived for Hermitian positive definite matrices. Finally, some examples are given in order to show the superiority of the new method. 展开更多
关键词 stair matrices iterative method parallel computation generalization of the AOR method
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New Upper Bounds for the Inverse of H-Matrices Including S-SDD Matrices and Linear Complementarity Problems 认领 引用 被引量：1
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作者 Yebo XIONG 《Journal of Mathematical Research with Applications》 CSCD 2024年第2期170-186,共17页
A partition reduction method is used to obtain new upper bounds for the inverses of H-matrices and S-strictly diagonally dominant(S-SDD)matrices.The estimates are expressed via the determinants of third order matrices... A partition reduction method is used to obtain new upper bounds for the inverses of H-matrices and S-strictly diagonally dominant(S-SDD)matrices.The estimates are expressed via the determinants of third order matrices.Numerical experiments with various random matrices show that they are stable and better than the estimates presented in literatures.We use these upper bounds to improve known error estimates for linear complementarity problems with H-matrices and S-SDD matrices. 展开更多
关键词 linear complementarity problem error bound upper bound S-SDD matrices Hmatrices
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Sparse Transform Matrices and Their Application in the Calculation of Electromagnetic Scattering Problems 认领 引用 被引量：6
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作者 CAO Xin-Yuan CHEN Ming-Sheng WU Xian-Liang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2013年第2期231-234,共4页
When compressed sensing is introduced into the moment method,a 3D electromagnetic scattering problem over a wide angle can be solved rapidly,and the selection of sparse basis has a direct influence on the performance ... When compressed sensing is introduced into the moment method,a 3D electromagnetic scattering problem over a wide angle can be solved rapidly,and the selection of sparse basis has a direct influence on the performance of this algorithm,especially the number of measurements.We set up five sparse transform matrices by discretization of five types of classical orthogonal polynomials,i.e.,Legendre,Chebyshev,the second kind of Chebyshev,Laguerre,and Hermite polynomials.Performances of the algorithm using these matrices are compared via numerical experiments,and the results show that some of them obviously work excellently and can accelerate wide angle scattering analysis greatly. 展开更多
关键词 matrices angle Scattering
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Preparation and Characterization of Collagen-GAGs Bioactive Matrices for Tissue Engineering 认领 引用 被引量：7
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作者 Hongyi YANG and Qiqing ZHANG Institute of Biomedical Engineering, Chinese Academy of Medical Science, Tianjin 300192, China 《Journal of Materials Science & Technology》 SCIE EI CAS 2001年第5期495-500,共6页
Collagen materials were crosslinked by 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC) in the presence of chondroitin sulfate (CS), one of glycosaminoglycans (GAGS). PVA and chitosan were also blended with colla... Collagen materials were crosslinked by 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC) in the presence of chondroitin sulfate (CS), one of glycosaminoglycans (GAGS). PVA and chitosan were also blended with collagen. The physical and chemical properties of the matrices were characterized by SEM, DSC, and ESCA. L929 cells were implanted on the matrices to show the cytotoxic and the biological characters of the materials. The results indicate that EDC is an effective and non-cytotoxic cross-link reagent, which can replace the common dialdehyde reagent. The attachment of CS can improve the stability of collagen and accelerate cell growth. The addition of PVA can prepare porous matrices with smaller bore size. There are reactions between the chitosan and collagen, and the composite has good biological character. The presence of chitosan can also increase the amount of incorporated CS. 展开更多
关键词 Preparation and Characterization of Collagen-GAGs Bioactive Matrices for Tissue Engineering PVA EDC CS
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Quantification of hookworm ova from wastewater matrices using quantitative PCR 认领 引用 被引量：1
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作者 Pradip Gyawali Warish Ahmed +2 位作者 Jatinder P.Sidhu Paul Jagals Simon Toze 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2017年第7期231-237,共7页
A quantitative PCR（q PCR） assay was used to quantify Ancylostoma caninum ova in wastewater and sludge samples.We estimated the average gene copy numbers for a single ovum using a mixed population of ova.The average ... A quantitative PCR（q PCR） assay was used to quantify Ancylostoma caninum ova in wastewater and sludge samples.We estimated the average gene copy numbers for a single ovum using a mixed population of ova.The average gene copy numbers derived from the mixed population were used to estimate numbers of hookworm ova in A.caninum seeded and unseeded wastewater and sludge samples.The newly developed qP CR assay estimated an average of3.7 × 10~3 gene copies per ovum,which was then validated by seeding known numbers of hookworm ova into treated wastewater.The qP CR estimated an average of（1.1 ± 0.1）,（8.6 ± 2.9）and（67.3 ± 10.4） ova for treated wastewater that was seeded with（1 ± 0）,（10 ± 2） and（100 ± 21）ova,respectively.The further application of the q PCR assay for the quantification of A.caninum ova was determined by seeding a known numbers of ova into the wastewater matrices.The qP CR results indicated that 50%,90% and 67% of treated wastewater（1 L）,raw wastewater（1 L）and sludge（~4 g） samples had variable numbers of A.caninum gene copies.After conversion of the q PCR estimated gene copy numbers to ova for treated wastewater,raw wastewater,and sludge samples,had an average of 0.02,1.24 and 67 ova,respectively.The result of this study indicated that qP CR can be used for the quantification of hookworm ova from wastewater and sludge samples;however,caution is advised in interpreting qP CR generated data for health risk assessment. 展开更多
关键词 Wastewater matrices Quantitative PCR Hookworm ova Health risks
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