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Best m-term One-sided Trigonometric Approximation of Some Function Classes Defined by a Kind of Multipliers

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Acta Mathematica Sinica,English Series 2010年第5期26卷 975-984页

作者： Ren Suo LI yong ping liu School of Mathematical Sciences Beijing Normal University Beijing 100875 P. R. China Department of Mathematics Shandong Agricultural University Tai ' an 271018 P. R. China

In this paper, we continue studying the so-called non-linear best m-term one-sided approximation problems and obtain the asymptotic estimations of non-linear best m-term one-sided trigonometric approximation under the norm Lp （1 ≤ p ≤ ∞） of multiplier function classes and the corresponding m-term Greedy-liked one-sided trigonometric approximation results.

关键词： non-linear best m-term approximation one-sided approximation Lp spaces trigonometric function system and Greedy approximation algorithm

N-Widths and Average Widths of Besov Classes in Sobolev Spaces

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1667-1678页

作者： Gui Qiao XU yong Sheng SUN yong ping liu School of Mathematical Sciences Beijing Normal University Beijing 100875 P. R. China School of Mathematical Sciences Tianjin Normal University Tianjin 300074 P. R. China

In this paper, we consider the n-widths and average widths of Besov classes in the usual Sobolev spaces. The weak asymptotic results concerning the Kolmogorov n-widths, the linear n-widths, the Gel＇fand n-widths, in the Sobolev spaces on T^d, and the infinite-dimensional widths and the average widths in the Sobolev spaces on Ra are obtained, respectively.

关键词： Besov class n-width Sobolev space Average width

Unthermal Hawking Radiation from a General Stationary Black Hole

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Communications in Theoretical Physics 2008年第2期49卷 379-381页

作者： ZHANG yong-ping DAI Qian liu Wen-Biao Department of Physics Institute of Theoretical Physics Beijing Normal University Beijing 100875 China

Using Damour-Ruflini＇s method, Hawking radiation from a general stationary black hole is investigated again deeply. Considering the back reaction of the particle to the space-time and energy conservation, we find that the radiation is not exactly thermal and can take out information from the black hole. This can be used to explain the information loss paradox, and the result is consistent with the works finished before.

关键词： Hawking radiation stationary black hole back-reaction information loss paradox unitary theory

Novel insight into perirenal adipose tissue: A neglected adipose depot linking cardiovascular and chronic kidney disease

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World Journal of Diabetes 2020年第4期11卷 115-125页

作者： Na Huang En-Wen Mao Ning-Ning Hou yong-ping liu Fang Han Xiao-Dong Sun Department of Endocrinology Affiliated Hospital of Weifang Medical UniversityWeifang 261031Shandong ProvinceChina Department of Pathology Affiliated Hospital of Weifang Medical UniversityWeifang 261031Shandong ProvinceChina

Obesity is associated with adverse metabolic diseases including cardiovascular disease(CVD) and chronic kidney disease(CKD).These obesity-related diseases are highly associated with excess fat accumulation in adipose ***,emerging evidence indicates that visceral adiposity associates more with metabolic and cardiovascular risk *** adipose tissue,surrounding the kidney,is originally thought to provides only mechanical support for ***,more studies demonstrated perirenal adipose tissue have a closer association with renal disease than other visceral fat deposits in ***,perirenal adipose tissue is also an independent risk factor for CKD and even associated more with ***,perirenal adipose tissue may be a connection of CVD with ***,we will provide an overview of the perirenal adipose tissue,a neglected visceral adipose tissue,and the roles of perirenal adipose tissue linking with CVD and CKD and highlight the perirenal adipose tissue as a potential strategy for future therapeutics against obesity-related disease.

关键词： Adipose tissue Cardiovascular diseases Kidney diseases Obesity Abdominal fat Endothelium

Comprehensive overview of human serum albumin glycation in diabetes mellitus

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World Journal of Diabetes 2021年第7期12卷 1057-1069页

作者： Hong-Yan Qiu Ning-Ning Hou Jun-Feng Shi yong-ping liu Cheng-Xia Kan Fang Han Xiao-Dong Sun Department of Endocrinology The Affiliated Hospital of Weifang Medical UniversityWeifang 261031Shandong ProvinceChina Department of Pathology The Affiliated Hospital of Weifang Medical UniversityWeifang 261031Shandong ProvinceChina

The presence of excess glucose in blood is regarded as a sweet hurt for patients with *** serum albumin(HSA)is the most abundant protein in human plasma,which undergoes severe non-enzymatic glycation with glucose in patients with diabetes;this modifies the structure and function of ***,the advanced glycation end products produced by glycated HSA can cause pathological damage to the human body through various signaling pathways,eventually leading to complications of *** potential glycation sites on HSA have different degrees of sensitivity to glucose *** review provides a comprehensive assessment of the in vivo glycation sites of HSA;it also discusses the effects of glycation on the structure and function of ***,it addresses the relationship between HSA glycation and diabetes ***,it focuses on the value of non-enzymatic glycation of HSA in diabetes-related clinical applications.

关键词： Diabetes mellitus Human serum albumin Non-enzymatic glycation Advanced glycation end products Glycation sites Diabetic complications

The Average Widths and Non-linear Widths of the Classes of Multivariate Functions with Bounded Moduli of Smoothness

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Acta Mathematicae Applicatae Sinica 2002年第4期18卷 663-674页

作者： yong-ping liu, Gui-qiao XuDepartment of Mathematics, Beijing Normal University, Beijing 100875, China Department of Mathematics, Tianjin Normal Univesity, Tianjin 300074. China Department of Mathematics Beijing Normal University Beijing 100875 China Department of Mathematics Tianjin Normal Univesity Tianjin 300074 China

The classes of the multivariate functions with bounded moduli on Rd and Td are given and their average σ-widths and non-linear n-widths are discussed. The weak asymptotic behaviors are established for the correspondi... 详细信息

关键词： Multivariate function classes average width non-linear width

cDNA Cloning of c33-c Antigen Gene Derived From NS3 Region of Chinese HCV Genome, Expression in Escherichia coli and Development of HCV EIA Second-Generation Diagnostic Kit

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Science China Chemistry 1994年第2期37卷 190-202页

作者： YANG yong-ping liu Chong-Bai JIN Dong-YanZHAN Mei-Yun TANG Quan XIA Ning-ShaoCAO Jing-Yuan and LI Jing-Yuan Institute of Virology Chinese Academy of Preventive Medicine Beijing 100052 PRC

A cDNA fragment of about 860 bp corresponding to the c33-c gene in the non-structural region 3 (NS3) of HCV genome was obtained from one plasma derived from a Chinese HCV carrier who came from Tai'an of Shandong Province, China by the application of reverse transcription (RT) and polymerase chain reaction (PCR) techniques. After the sequence of the cDNA fragment was determined and compared with the equivalent region of. the HCV-I (HCV-US) and HCV-II (HCV-BK) genomes, the nucleotide/ amino acid sequence homologies were found to be 79. 2%/91. 3% and 91. 3%/93. 9%, respectively. The prokaryotic expression vector pBV220 was employed for the overproduction of c33-c native recombinant protein in E. coli cells. The expression products were detected by enzyme-linked immunosorbent assay (ELISA) and Western blotting with antisera of chronic hepatitis C patients, and a molecular weight 31 kD of c33-c viral protein was shown to account for 14% of the total cellular soluble proteins. This product was extracted from the bacterial lysate by lysozyme, Triton X-100 and urea treatment, and purified through ion exchange chromatography. The purified c33-c protein combined with a branch peptide MAP-C-19 representing immunodominant epitopes on the nucleocapsid region of HCV genome was used to develop a Chinese HCV EIA 2nd-generation diagnostic kit for the detection of anti-HCV antibodies. Its specifity, sensitivity and re-producibility were all in keeping with the indexes of the national standard for the quality control of the HCV diagnostic kit. The agreement rate between our kit and Abbott company's HCV EIA second-generation diagnostic kit was 99. 33% , and the identified rate of positive anti-HCV of our kit was 2% more than that of the Abbott company's kit.

关键词： HCV cDNA cloning overproduction of recombinant protein expression protein purification HCV EIA diagnostic kit.

Relationship between serum Dickkopf-1 and albuminuria in patients with type 2 diabetes

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World Journal of Diabetes 2021年第1期12卷 47-55页

作者： Ning-Ning Hou Cheng-Xia Kan Na Huang yong-ping liu En-Wen Mao Yu-Ting Ma Fang Han Hong-XiSun Xiao-Dong Sun Department of Endocrinology Affiliated Hospital of Weifang Medical UniversityWeifang 261031Shandong ProvinceChina Department of Pathology Affiliated Hospital of Weifang Medical UniversityWeifang 261031Shandong ProvinceChina

BACKGROUND Diabetic kidney disease is a microvascular complication of diabetes with complex *** signaling-mediated renal fibrosis is associated with diabetic kidney ***-1,a negative regulator of Wingless,has been proven to participate in renal fibrosis,glucose metabolism,and ***,whether serum Dickkopf-1 levels are associated with diabetic kidney disease remains *** To assess the relationship between serum Dickkopf-1 levels and albuminuria in individuals with type 2 *** Seventy-three type 2 diabetes patients and 24 healthy individuals were enrolled in this case-control *** individuals were separated into normal albuminuria,microalbuminuria,and macroalbuminuria groups based on their urinary albumin/creatinine ratios(UACRs).Clinical characteristics and metabolic indices were *** Dickkopf-1 levels were determined by enzymelinked immunosorbent *** No significant difference in serum Dickkopf-1 levels was found between healthy individuals and the normal albuminuria ***,the levels in the microalbuminuria group were significantly lower than those in the normal albuminuria group(P=0.017),and those in the macroalbuminuria group were the *** analysis revealed that serum Dickkopf-1 levels were positively correlated with hemoglobin A1c level(r=0.368,P<0.01)and estimated glomerular filtration rate(r=0.339,P<0.01),but negatively correlated with diabetes duration(r=-0.231,P=0.050),systolic blood pressure(r=-0.369,P=0.001),serum creatinine level(r=-0.325,P<0.01),and UACR(r=-0.459,P<0.01).Multiple and logistic regression showed that serum Dickkopf-1 levels were independently associated with UACR(odds ratio=0.627,P=0.021).CONCLUSION Serum Dickkopf-1 levels are negatively associated with *** serum Dickkopf-1 levels could be a critical risk factor for albuminuria in diabetes.

关键词： Dickkopf-1 Albuminuria Diabetic kidney disease Type 2 diabetic mellitus Wingless Microalbuminuria

High-intensity focused ultrasound treatment for patients with unresectable pancreatic cancer

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Hepatobiliary & Pancreatic Diseases International 2012年第6期11卷 655-660页

作者： Peng-Zhou Li, Shai-Hong Zhu, Wei He, Li-yong Zhu, Sheng-ping liu, Yan liu, Guo-Hui Wang, Fei Ye Department of General Surgery ,Department of Radiology, Third Xiangya Hospital, Central South University, Changsha 410013, China [a] Department of General Surgery Third Xiangya Hospital Central South University Changsha 410013 China [b] Department of Radiology Third Xiangya Hospital Central South University Changsha 410013 China

BACKGROUND: High-intensity focused ultrasound (HIFU) is a non-invasive method of solid tissue ablation therapy. However, only a few studies have reported the effect of HIFU for unresectable pancreatic cancer. This study aimed to evaluate the clinical benefits, survival time and complications associated with the use of HIFU ablation in patients with unresectable pancreatic cancer. METHODS: Twenty-five patients with unresectable pancreatic cancer were enrolled in our study. All patients received HIFU therapy for tumors at least once. The therapeutic effects of HIFU was evaluated in terms of Karnofsky performance status (KPS) scores, pain relief, serum CA19-9, and imaging by B-US and CT before and after the therapy. We also recorded median overall survival time and complications caused by the treatment. RESULTS: In the 25 patients, KPS scores were above 60, and increased KPS was observed in 23 patients after treatment. Pain relief occurred in 23 patients. Serum CA19-9 levels were significantly reduced one month after HIFU treatment and became negative in 5 patients. B-US revealed enhanced tumor echogenicity in 13 patients and decreased tumor blood supply in 9. Tumor necrosis was confirmed by CT in 8 patients one month after HIFU treatment. The median overall survival time was 10 months, and the 1-year survival rate was 42%. No severe complications were observed after HIFU treatment. CONCLUSION: HIFU can effectively relieve pain, increase KPS, decrease tumor growth and prolong the survival time of patients with unresectable pancreatic cancer.

关键词： pancreatic cancer high-intensity focused ultrasound therapy