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Two Weighted Estimates for the Commutators of Multilinear Maximal Singular Integral Operators with Dini-type Kernels

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Acta Mathematica Sinica,English Series 2023年第3期39卷 459-480页

作者： chun mei zhang School of Mathematical Sciences Beijing Normal UniversityBeijing 100875P.R.China

The main purpose of this paper is to investigate the properties of the higher order commutators of maximal Calderón-Zygmund operators with Dini-type kernels.Two weighted estimates have been established for these comm... 详细信息

关键词： Commutators sparse domination multlinear maximal singular integral operators Dinitype kenels two weighted boundedness

Effect of Same-dose Single or Dual Field Irradiation on Damage to Miniature Pig Parotid Glands

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International Journal of Oral Science 2009年第1期1卷 16-25页

作者： Xing Yan Bo Hai Zhao-chen Shan Chang-yu Zheng chun-mei zhang Song-lin Wang Salivary Gland Disease Center and the Molecular Laboratory for Gene Therapy Capital Medical University School ofStomatology Beijing China Beijing Friendship Hospital Capital Medical University Beijing China Gene Therapy and Therapeutics Branch National Institute of Dental and Craniofacial Research NIH DHHS BethesdaMD USA Department of Biochemistry and Molecular Biology Capital Medical University Beijing China

Aim To evaluate the effect of single or dual field irra- diation （IR） with the same dose on damage to miniature pig parotid glands. Methodology Sixteen miniature pigs were divided into two IR groups （n=6） and a control group （n=4）. The irradi- ation groups were subjected to 20 Gy X-radiation to one parotid gland using single-field or dual-field modality by linear accelerator. The dose-volume distributions between two IR groups were compared. Saliva from parotid glands and blood were collected at 0, 4, 8 and 16 weeks after irradiation. Parotid glands were removed at 16 weeks to evaluate tissue morphology.Results The irradiation dose volume distributions were significantly different between single and dual field irradi- ation groups （t----4.177, P=0.002）, although dose volume histogramin （DVH） indicated the equal maximal dose in parotid glands. Saliva flow rates from IR side decreased dramatically at all time points in IR groups, especially in dual field irradiation group. The radiation caused changes of white blood cell count in blood, lactate dehydrogenase and amylase in serum, calcium, potassium and amylase in saliva. Morphologically, more severe radiation damage was found in irradiated parotid glands from dual field irradi- ation group than that from single field irradiation group. Conclusion Data from this large animal model demons- trated that the radiation damage from the dual field irradiation was more severe than that of the single field irradiation at the same dose, suggesting that dose-volume distribution is an important factor in evaluation of the radiobiology of parotid glands.

关键词： irradiation damage miniature pig parotidgland

A paradox:Insulin inhibits expression and secretion of resistin which induces insulin resistance

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World Journal of Gastroenterology 2008年第1期14卷 95-100页

作者： Feng Liu Hong-Qi Fan Jie Qiu Bin Wang Min zhang Nan Gu chun-mei zhang Li Fei Xiao-Qing Pan mei Guo Rong-Hua Chen Xi-Rong Guo Department of Pediatrics NanjingMaternity & Child Health Hospital of Nanjing Medical UniversityNanjing 210004 Jiangsu Province China Institute of Pediatrics of NanjingMedical University Nanjing 210029 Jiangsu Province China

AIM: To confirm whether insulin regulates resistinexpression and secretion during differentiation of 3T3-L1preadipocytes and the relationship of resistin with insulinresistance both in vivo and in vitro.METHODS: Supernatant resistin was measured duringdifferentiation of 3T3-L1 preadipocytes. L6 rat myoblastsand hepatoma cell line H4IIE were used to confirm thecellular function of resistin. Diet-induced obese ratswere used as an insulin resistance model to study therelationship of resistin with insulin resistance.RESULTS: Resistin expression and secretion wereenhanced during differentiation 3T3-L1 preadipocytes.This cellular differentiation stimulated resistin expressionand secretion, but was suppressed by insulin. Resistinalso induced insulin resistance in H4IIE hepatocytes andL6 myoblasts. In diet-induced obese rats, serum resistinlevels were negatively correlated with insulin sensitivity,but not with serum insulin.CONCLUSION: Insulin can inhibit resistin expressionand secretion in vitro, but insulin is not a major regulatorof resistin in vivo . Fat tissue mass affects insulinsensitivity by altering the expression and secretion ofresistin.

关键词：胰岛素抵抗素胰岛素抵抗糖尿病

Impact of self-directed learning readiness and learning attitude on problem-solving ability among Chinese undergraduate nursing students

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Frontiers of Nursing 2019年第2期6卷 143-150页

作者： Ru-Zhen Luo Xiao-Hong zhang chun-mei zhang Yan-Hui Liu School of Nursing Tianjin University of Traditional Chinese Medicine

Objective: To explore the effects of self-directed learning readiness and learning attitude on problem-solving ability among Chinese undergraduate nursing students. Methods: A convenience sampling of 460 undergraduate nursing students was surveyed in Tianjin, China. Students who participated in the study completed a questionnaire that included social demographic questionnaire, Self-directed Learning Readiness Scale, Attitude to Learning Scale, and Social Problem-Solving Inventory. Pearson’s correlation analysis was performed to test the correlations among problem-solving ability, self-directed learning readiness, and learning attitude. Hierarchical linear regression analyses were performed to explore the mediating role of learning attitude. Results: The results showed that learning attitude (r=0.338, P<0.01) and self-directed learning readiness (r=0.493, P<0.01) were positively correlated with problem-solving ability. Learning attitude played a partial intermediary role between self-directed learning readiness and problem-solving ability (F=74.227, P<0.01). Conclusions: It is concluded that nursing educators should pay attention on students’ individual differences and take proper actions to inspire students’ self-directed learning readiness and learning attitude.

关键词： undergraduate nursing students self-directed learning readiness learning attitude problem-solving ability China

Total synthesis of cyclic heptapeptide euryjanicin B

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Chinese Chemical Letters 2011年第6期22卷 631-634页

作者： chun mei zhang Jun Xiang Guo Liang Wang Xiao Yun Chai Hong Gang Hu Qiu Ye Wu Department of Organic Chemistry School of PharmacySecond Military Medical UniversityShanghai 200433China School of Pharmacy Yantai UniversityYantai 264005China

自然地发生的第一合成周期的肽 euryjanicin B 被完成了。一个一般方法被描述综合由二拍子的圆舞 solid-phase/solution 合成策略的周期的肽。在这研究的所有氨基酸是 L 配置，线性 heptapeptide 被标准 Fmoc 化学装配在上稳固阶段并且... 详细信息

自然地发生的第一合成周期的肽 euryjanicin B 被完成了。一个一般方法被描述综合由二拍子的圆舞 solid-phase/solution 合成策略的周期的肽。在这研究的所有氨基酸是 L 配置，线性 heptapeptide 被标准 Fmoc 化学装配在上稳固阶段并且随后，环合被溶液方法执行。

关键词：全合成环肽化学组装 Fmoc 氨基酸

Role of academic self-efficacy in the relationship between self-directed learning readiness and problem-solving ability among nursing students

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Frontiers of Nursing 2018年第1期5卷 75-81页

作者： Xiao-Hong zhang Li-Na Meng Hui-Hui Liu Ru-Zhen Luo chun-mei zhang Pei-Pei zhang Yan-Hui Liu Tianjin University of Traditional Chinese Medicine Tianjin 300193China Inspection Department Tianjin Childrens HospitalTianjin 300134China

Objective: Problem-solving should be a fundamental component of nursing education because It is a core ability for professional nurses. For more effective learning, nursing students must understand the relationship between self-directed learning readiness and problem-solving ability. The aim of this study was to investigate the relationships among self-directed learning readiness, problemsolving ability, and academic self-efficacy among undergraduate nursing students.Methods: From November to December 2016, research was conducted among 500 nursing undergraduate students in Tianjin, China,using a self-directed learning readiness scale, an academic self-efficacy scale, a questionnaire related to problem-solving, and selfdesigned demographics. The response rate was 85.8%.Results: For Chinese nursing students, self-directed learning readiness and academic self-efficacy reached a medium-to-high level,while problem-solving abilities were at a low level. There were significant positive correlations among the students' self-directed learning readiness, academic self-efficacy, and problem-solving ability. Furthermore, academic self-efficacy demonstrated a mediating effect on the relationship between the students' self-directed learning readiness and problem-solving ability.Conclusions: To enhance students' problem-solving ability, nursing educators should pay more attention to the positive impact of self-directed learning readiness and self-efficacy in nursing students' education.

关键词： self-directed readiness problem-soving academic self-efficacy nursing students cross-sectional survey

Research status and influencing factors of nurse bullying in the workplace:A literature review

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TMR Integrative Nursing 2020年第5期4卷 156-162页

作者： Jia Liu Yuan Liu chun-mei zhang Graduate College Tianjin University of Traditional Chinese MedicineTianjinChina Department of Gynaecology Cangzhou Central HospitalCangzhouHebeiChina School of Nursing Tianjin University of Traditional Chinese MedicineTianjinChina

This paper aims to review the status quo of nurse bullying,explore the factors affecting nurse bullying and provide references for the formation of targeted intervention measures,so as to promote nurses'occupational health and the development of nursing career.Through sorting out and summarizing,the current research on nurse bullying can be summarized into conceptual analysis,current situation investigation,qualitative research and intervention research,among which the current situation investigation is the main one.The factors influencing nurses'bullying can be divided into individual,organizational and social factors.We propose future research should be conducted on multiple levels in combination with the actual situation of each country,and psychological,ethical and other disciplines should be integrated to curb bullying at the source according to the influencing factors.

关键词： Bullying Nurse bullying Influencing factors Review

Delayed error verification in quantum key distribution

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Chinese Science Bulletin 2014年第23期59卷 2825-2828页

作者： chun-mei zhang Xiao-Tian Song Patcharapong Treeviriyanupab Mo Li Chao Wang Hong-Wei Li Zhen-Qiang Yin Wei Chen Zheng-Fu Han Key Laboratory of Quantum Information CASUniversity of Science and Technology of China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Department of Computer Science Faculty of Science and TechnologyPhranakhon Rajabhat University

Quantum key distribution(QKD)provides an unconditional secure key generation method between two distant legitimate parties Alice and Bob based on the fundamental properties of quantum mechanics,in the presence of an eavesdropper Eve.Since key reconciliation cannot always assure that the reconciled keys between Alice and Bob are identical,error verification is an important step in QKD.In this paper,we propose a scheme of delayed error verification using extra keys gained by privacy amplification with an arbitrarily small failure probability.The proposed scheme simplifies the post-processing procedure in QKD,which can be applied in practical QKD systems.

关键词：量子密钥分配误差检定延迟量子密钥分发无条件安全生成方法量子力学误差校验

Construction of a Talent Cultivation Mode for Traditional Chinese Medicine Nursing Inheritance

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Journal of Integrative Nursing 2019年第3期1卷 132-137页

作者： Ye LI Jing LIU Ling TANG chun-mei zhang Mi zhang Otolaryngology Head and Neck SurgeryPeking University First HospitalBeijing100034China Outpatient Department Beijing University of Chinese Medicine Third Affiliated HospitalBeijing10029China Department of Nursing Dongfang Hospital of Beijing University of Chinese MedicineBeijing 100078China

Objective:To explore and build traditional Chinese medicine(TCM)nursing inheritance on the talent training scheme,the foundation for cultivating outstanding talents of TCM nursing inheritance.Methods:The modified Delphi method was used for conducting two rounds of consultation with 15 TCM nursing experts to formulate training plan.Results:The questionnaire recovery rates of two rounds of expert enquiry were 100.00%,with high experts enthusiasm,experts coefficients were 0.83 and 0.81,respectively.Kendall coordination coefficient were 0.26 and 0.30,respectively(P<0.01).After two rounds of expert consultation,the TCM nursing inheritance talent training scheme was finally formed,including 3 first-level indicators,7 second-level indicators and 24 third-level indicators.Conclusion:Construction of talent cultivating program of TCM nursing inheritance is scientific and feasible,with a certain reference value.

关键词： Traditional Chinese medicine nursing Inheritance Talent cultivation