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Global Weak Entropy Solution of Nonlinear Ideal Reaction Chromatography System and Applications

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Acta Mathematicae Applicatae Sinica 2023年第1期39卷 109-134页

作者： jing zhang Hong-xia LIU Tao PAN School of Computer Science and Technology Dongguan University of TechnologyDongguan 523808China Department of Mathematics Jinan UniversityGuangzhou 510632China Department of Optoelectronic Engineering Jinan UniversityGuangzhou 510632China

The ideal reaction chromatography model can be regarded as a semi-coupled system of two hyperbolic partial differential equations, in which, one is a self-closed nonlinear equation for the reactant concentration and another is a linear equation coupling the reactant concentration for the resultant concentration. This paper is concerned with the initial-boundary value problem for the above model. By the characteristic method and the truncation method, we construct the global weak entropy solution of this initial initial-boundary value problem for Riemann type of initial-boundary data. Moreover, as examples, we apply the obtained results to the cases of head-on and wide pulse injections and give the expression of the global weak entropy solution.

关键词： ideal reaction chromatography model reactant and resultant concentration initial-boundary value problem global weak entropy solution head-on injection wide pulse injection

TNFα对HBV体外感染人绒毛膜癌JEG Ⅲ细胞的促进作用

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世界华人消化杂志 2005年第1期13卷 31-34页

作者：李富军王雪萍徐德忠闫永平门可张景霞兰州军区兰州总医院医务部甘肃省兰州市730050 中国人民解放军第四军医大学预防医学系流行病学教研室陕西省西安市710033

目的:检测TNF-α存在条件下HBV体外感染人绒毛膜癌细胞的情况,为HBV宫内传播机制的研究提供细胞学基础. 方法:在TNF-α存在条件下,绒毛膜癌JEGIII细胞与HBV阳性血清(2×1012HBV DNA/L)共同孵育.感染后24 h,胰酶常规消化细胞,PBS充分洗涤... 详细信息

目的:检测TNF-α存在条件下HBV体外感染人绒毛膜癌细胞的情况,为HBV宫内传播机制的研究提供细胞学基础. 方法:在TNF-α存在条件下,绒毛膜癌JEGIII细胞与HBV阳性血清(2×1012HBV DNA/L)共同孵育.感染后24 h,胰酶常规消化细胞,PBS充分洗涤,直至最后一遍洗液ELISA检测HBsAg阴性,重新接种细胞,加新鲜培养液继续培养,每隔12 h,收集培养标本,分别用Western blotting,免疫细胞化学方法,透射电镜检测培养物中HBV标志物. 结果:HBV阳性血清感染JEGIII细胞36 h后,各时间点收集的细胞上清标本中Western blotting均检测到阳性的HBsAg条带,免疫细胞化学方法检测细胞铺片发现,在TNF-α存在的感染环境下,HBsAg呈阳性或强阳性表达,与TNF-α不存在的感染环境下相比有显著性差别(20.40±4016 vs 7.40±1.82,P<0.01),而且HbsAg主要位于胞膜和/或胞质,透射电镜下,细胞扩张的粗面内质网腔内发现有杆状HBsAg颗粒. 结论:HBV体外可以成功感染人绒毛膜癌细胞.本体外细胞感染模型是深入研究HBV宫内传播机制的关键.

关键词： HBV 人绒毛膜癌细胞体外感染 TNF-α 宫内传播 TNFα 成功感收集结论

Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： Xu Liang Ni-Hui zhang Zhi-Lai Zhan Guang-Lu Chang Yan Gao xia Li Wen-Yuan Gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

Pulp health and calcific healing of a complicated crown–root fracture with additional root fracture in a maxillary incisor: A case report

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World Journal of Clinical Cases 2025年第3期13卷 42-49页

作者： Na Li Yue-Yue Ren Ying Tang Qi Yang Tian-Tian Meng Song Li jing zhang Stomatological Hospital and College Anhui Medical UniversityHefei 230032Anhui ProvinceChina Department of Endodontics The Affiliated Stomatological Hospital of Xuzhou Medical UniversityXuzhou 221000Jiangsu ProvinceChina

BACKGROUND Complicated crown–root fracture (CRF) involves severe injury to the crown, root,and pulp, and may be accompanied by multiple root fractures. The loss of a toothhas lifelong consequences for children and teenagers, but the maintenance of pulphealth and the calcific healing of multiple root fractures are rarely reported in *** SUMMARY This case reports healing of a permanent tooth with complicated crown–root andadditional root fractures, in which pulp health was maintained. A 10-year-old girlfell and fractured the root of her maxillary left central incisor at the cervical *** the coronal fragment was repositioned, the tooth was splinted until thetooth was no longer mobile, 2 years later. Eight years after treatment, the toothhas remained asymptomatic with vital pulp and localized gingival ***-beam computed tomography revealed not only calcified healing of the CRFbut also spontaneous healing in an additional undiagnosed root fracture. Thefracture line on the enamel could not be healed by hard tissue and formed agroove in the cervical crown. It was speculated that the groove was related to thelocalized gingival *** This case provides a clinical perspective of the treatment of a tooth with acomplicated CRF and an additional root fracture.

关键词： Complicated crown-root fracture Multiple root fracture Spontaneous healing Cone-beam computed tomography Long-term follow-up Case report

Predicting As,Cd and Pb uptake by rice and vegetables using field data from China

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Journal of Environmental Sciences 2011年第1期23卷 70-78页

作者： Hongzhen zhang Yongming Luo jing Song Haibo zhang Jiaqi xia Qiguo Zhao Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China Chinese Academy for Environmental Planning of Ministry of Environmental Protection Beijing 100012 China Nanjing Institute of Environmental Science Ministry of Environmental Protection Nanjing 210042 China

Plant uptake factor （PUF）, single-variable regression of natural log-transformed concentrations in rice grain/vegetables versus natural log-transformed concentrations in soil and multiple-variable regression with soil concentrations and pH, was derived, validated and compared based on the paired crop and soil data collected from studies regarding As, Cd and Pb contaminated croplands in China. Results showed that the median value of PUF did not present deterministic prediction. But after natural logarithm transformation, the PUF followed Gaussian distribution which could be useful in risk assessment. The single-variable regression models were significant for As, Cd and Pb uptake both by rice and vegetables; however, the standard errors of all the regressions were comparatively large. Soil pH as a variable was generally significant but it only contributed positively to model fit for Cd uptake. After model comparison and selection, the upper 95% prediction limits of the multiple regression model for Cd uptake by rice was recommended to calculate screening value of Cd for paddy soil based on the limit for Cd concentration in rice grain.

关键词： trace elements regression model rice vegetable plant uptake factor croplands

A new strategy for estimating photometric redshifts of quasars

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Research in Astronomy and Astrophysics 2019年第12期19卷 223-234页

作者： Yan-xia zhang jing-Yi zhang Xin Jin Yong-Heng Zhao Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Based on the SDSS and SDSS-WISE quasar datasets, we put forward two schemes to estimate the photometric redshifts of quasars. Our schemes are based on the idea that the samples are firstly classified into subsamples by a classifier and then a photometric redshift estimation of different subsamples is performed by a regressor. Random Forest is adopted as the core algorithm of the classifiers, while Random Forest and k NN are applied as the key algorithms of regressors. The samples are divided into two subsamples and four subsamples, depending on the redshift distribution. The performances based on different samples, different algorithms and different schemes are compared. The experimental results indicate that the accuracy of photometric redshift estimation for the two schemes generally improves to some extent compared to the original scheme in terms of the percents in |△z|1+zi< 0.1 and |△z|1+zi<0.2 and mean absolute error. Only given the running speed, k NN shows its superiority to Random Forest. The performance of Random Forest is a little better than or comparable to that of k NN with the two datasets. The accuracy based on the SDSS-WISE sample outperforms that based on the SDSS sample no matter by k NN or by Random Rorest. More information from more bands is considered and helpful to improve the accuracy of photometric redshift estimation. Evidently, it can be found that our strategy to estimate photometric redshift is applicable and may be applied to other datasets or other kinds of objects. Only talking about the percent in |△z|1+zi<0.3, there is still large room for further improvement in the photometric redshift estimation.

关键词： astronomical databases:catalogs (galaxies:)quasars:general methods:statistical techniques:miscellaneous

Accuracy of ultrasonography in diagnosis of fetal central nervous system malformation

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World Journal of Clinical Cases 2021年第27期9卷 8027-8034页

作者： Bo Pang jing-jing Pan Qin Li xia zhang Department of Ultrasound The First Affiliated Hospital of Wannan Medical CollegeWuhu 241000Anhui ProvinceChina Department of Neurosurgery The Second People’s Hospital of WuhuWuhu 241000Anhui ProvinceChina Department of Gynaecology and Obstetrics The First Affiliated Hospital of Wannan Medical CollegeWuhu 241000Anhui ProvinceChina

BACKGROUND Prenatal examination is an important measure for the screening and diagnosis of fetal *** To investigate the accuracy of ultrasonography in the diagnosis of fetal central nervous system(CNS)*** One hundred and thirteen pregnant women suspected of having fetal CNS malformations were examined at our hospital from December 2018 to October 2020 using two-dimensional ultrasonography and three-dimensional ultrasonography,*** According to the pathological results,there were 79 cases of CNS malformations and 34 cases of non-CNS malformations among the 113 pregnant women suspected of having fetal CNS ***-one cases of CNS malformation and 26 cases of non-CNS malformation were detected by two-dimensional ultrasonography,and 73 cases of CNS malformation and 30 cases of non-CNS malformation were detected by three-dimensional *** diagnostic sensitivity(92.41%)and accuracy(91.15%)of three-dimensional ultrasonography were higher than those of two-dimensional ultrasonography(64.56% and 68.14%,respectively)(P=0.000).The specificity of three-dimensional ultrasonography(88.24%)was higher than that of two-dimensional ultrasonography(76.47%);however,the difference was not significant(P=0.203).CONCLUSION Three-dimensional ultrasonography has high application value in the diagnosis of fetal CNS *** addition,the image quality is clear,and the diagnostic sensitivity and accuracy are high.

关键词： Ultrasonography Fetal central nervous system malformation Diagnostic accuracy Screening Diagnosis

Is it possible to foot reflexology for infants with sensorineural hearing loss?

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World Journal of Clinical Cases 2025年第2期13卷 1-4页

作者： Min Ai Hang-Hang zhang Jun-Bang Feng Chuan-Ming Li Wen-jing Wang Meng-Die Hu Department of Anesthesiology Nanan District People's Hospital of ChongqingChongqing 400060China Department of Breast and Thyroid Surgery Chongqing Bishan District Maternal and Child Health Care HospitalChongqing 402760China Department of Medical Imaging Chongqing University Central HospitalChongqing 400014China

Foot reflexology is a non-invasive and safe complementary therapy that works by massaging the reflex zones of the feet and exerts systemic or whole-body regulation through meridian nerve *** therapy is commonly used in the treatment of various conditions such as autism and Parkinson's ***,there is limited reporting on the use of foot reflexology therapy for infants with sensorineural hearing loss(SNHL).Currently,there is no definitive conclusion on how foot reflexology therapy can influence *** editorial holds some guiding significance regarding this clinical *** aim is to present physiological evidence of how foot reflexology therapy can impact infants with SNHL,thereby enhancing clinician’s awareness of foot reflexology in treating infants with SNHL.

关键词： Foot reflexology Sensorineural Hearing Loss Future perspectives Limitations Neural conduction

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缺陷对单层硅烯纳米梁振动频率的影响

原子与分子物理学报 2025年第6期42卷 76-82页

作者：张文博王静新疆大学物理科学与技术学院乌鲁木齐830017

由于硅纳米谐振器在量子计算、传感器、医学等方面存在广泛的应用,使其物理性质的研究具有重要意义.本文通过分子动力学模拟方法研究了掺杂元素、空位缺陷、掺杂浓度对单层硅烯纳米梁振动特性的影响.研究结果表明,单层硅烯纳米梁的振动... 详细信息

由于硅纳米谐振器在量子计算、传感器、医学等方面存在广泛的应用,使其物理性质的研究具有重要意义.本文通过分子动力学模拟方法研究了掺杂元素、空位缺陷、掺杂浓度对单层硅烯纳米梁振动特性的影响.研究结果表明,单层硅烯纳米梁的振动频率随着纳米梁长度的增加而减小.单元素、双元素掺杂均会导致单层硅烯纳米梁的振动频率的增加,且随着掺杂浓度的增加纳米梁的振动频率整体呈现增大的趋势.此外,单空位缺陷会导致单层硅烯纳米梁的振动频率随着缺陷浓度的增加而减小.掺杂-单空位缺陷的单层硅烯纳米梁的振动频率则呈现了随着掺杂浓度的增加先减小后增加的变化趋势.这些变化规律均是由掺杂元素、空位缺陷以及它们共同作用的结果.此研究结果对硅烯纳米谐振器,振荡器等纳米器件的设计具有一定的理论指导意义.

关键词：硅烯掺杂振动频率分子动力学