Nonlinear resonances of nonlocal strain gradient nanoplates made of functionally graded materials considering geometric imperfection

Jia-Qin Xu,Gui-Lin She,Yin-Ping Li,Lei-Lei Gan 국제구조공학회 2023 Steel and Composite Structures, An International J Vol.47 No.6

When studying the resonance problem of nanoplates, the existing papers do not consider the influences of geometric nonlinearity and initial geometric imperfection, so this paper is to fill this gap. In this paper, based on the nonlocal strain gradient theory (NSGT), the nonlinear resonances of functionally graded (FG) nanoplates with initial geometric imperfection under different boundary conditions are established. In order to consider the small size effect of plates, nonlocal parameters and strain gradient parameters are introduced to expand the assumptions of the first-order shear deformation theory. Subsequently, the equations of motion are derived using the Euler-Lagrange principle and solved with the help of perturbation method. In addition, the effects of initial geometrical imperfection, functionally graded index, strain gradient parameter, nonlocal parameter and porosity on the nonlinear forced vibration behavior of nanoplates under different boundary conditions are discussed.

Fatigue strength predictions of FOD dents using ΔK threshold methods considering residual stresses

Xu Jia,Xuteng Hu,Zijia Zhu,Yingdong Song 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.1

Fatigue strength predictions of TC4 FOD-dent specimens using ΔK threshold methods considering residual stresses were the main emphasis in this paper. Both the experimental simulation and the fatigue test were conducted to evaluate the HCF performance of the real FOD dent. The geometrical models of FOD dents were established for the elastic stress concentration analysis. Residual stresses around the dent were numerical simulated or reservedly solved from the laboratory test data and subsequently established as a function of the dent depth. With numerical simulated residual stresses, the prediction results fall into an error interval of about ±30 %. With the reserved residual stress, the method has a smaller error interval of about ±20 %. Both the two procedures can fortunately meet the exit criteria which is probably because the potential micro-damages like micro crack and adiabatic shear band etc. could be counted as sharp cracks.

In situ deposition of flower-like ZnO on silk fibroin fibers

Xu, Jia,Su, Huilan,Han, Jie,Chen, Ying,Song, Weiqiang,Gu, Yu,Moon, Won-Jin,Zhang, Di Springer-Verlag 2012 APPLIED PHYSICS A MATERIALS SCIENCE AND PROCESSING Vol.108 No.1

Analysis of Rural Tourism Service Quality and improvement Countermeasures of Shandong Province

Xu, Jia,Sun, Fengzhi 한중경제문화학회 2015 한중경제문화연구 Vol.4 No.-

Tourism service quality is the lifeline for the survival of tourism enterprises , which is the core embodiment of the competitiveness of tourism enterprises. Based on the perspective of tourists perceived value, this paper aimed to analyze the quality of rural tourism of Shandong province, it indentified the effect factors of tourist service quality from two research perspective: the impact to the expectations before the tourists travel process and the experience during tourists travel the process. And then, through the analysis of problems existing in the rural tourism service of Shandong province, it put forward the relative countermeasures. Key Words

Emotional Rationality in Confucian Ethics

Xu Jia 한국윤리학회 2020 倫理硏究 Vol.129 No.1

Confucian ethic is characterized by emotional rationality. It conceptualizes emotions, which are subjective and individual, by intelligence. Given this, confucian ethics constructs ethical principles. At the beginning stage, confucian ethic takes “benevolence” as its core, “filial piety” and “fraternal duty” as its beginning, “love the multitude at large” as its goal, and “rest mind” as its ground. Following this, Mencius identifies sympathy as human nature. Therefore, he overcomes the uncertainty of ethical principles bound up with blood relationships, emphasizing that benevolence and love are universal. In Song and Ming dynasties, two schools, which are distinguished in terms of their metaphysics, emerged: one is characterized by “principle”, the other by “mind”. Confucian ethic states that benevolence and love are the characteristics of humans and what makes humans humans, and believes that every human being shares the common emotions and sympathy. In addition, it maintained that benevolence and love are not only possessed by human beings but also the foundation of a confucian metaphysics about the universe. It is therefore concluded that confucian ethic, which highlights emotional rationality, provides people with a variety of moral choices: individuals have diverse comprehensions of benevolence and love, so, there are higher and lower levels of spiritual states. The point is not only to differentiate between moral and nonmoral behaviours, but also to identify which sort of behaviours embodies higher moral value.

Thermal post-buckling of graphene platelet reinforced metal foams doubly curved shells with geometric imperfection

Jia-Qin Xu,Gui-Lin She 국제구조공학회 2023 Structural Engineering and Mechanics, An Int'l Jou Vol.87 No.1

In the present work, thermal buckling and post-buckling behaviors of imperfect graphene platelet reinforced metal foams (GPRMFs) doubly curved shells are examined. Material properties of GPRMFs doubly curved shells are presumed to be the function of the thickness. Reddy’ shell theory incorporating geometric nonlinearity is utilized to derive the governing equations. Various types of the graphene platelets (GPLs) distribution patterns and doubly curved shell types are taken into account. The nonlinear equations are discretized for the case of simply supported boundary conditions. The thermal postbuckling response are presented to analyze the effects of GPLs distribution patterns, initial geometric imperfection, GPLs weight fraction, porosity coefficient, porosity distribution forms, doubly curved shell types. The results show that these factors have significant effects on the thermal post-buckling problems.

How Reliable Are Standard Radiographic Measures of the Foot and Ankle in Children With Achondroplasia? :

Xu, Jia,Park, Kwang-Won,Kang, Qing-Lin,Jung, Young-Jin,Song, Hae-Ryong Ovid Technologies (Wolters Kluwer) - Lippincott Wi 2013 Clinical orthopaedics and related research Vol.471 No.9

Genetic Variants of NBS1 Predict Clinical Outcome of Platinum-based Chemotherapy in Advanced Non-small Cell Lung Cancer in Chinese

Xu, Jia-Li,Hu, Ling-Min,Huang, Ming-De,Zhao, Wan,Yin, Yong-Mei,Hu, Zhi-Bin,Ma, Hong-Xia,Shen, Hong-Bing,Shu, Yong-Qian Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.3

Objective: NBS1 plays a key role in the repair of DNA double-strand break (DSB). We conducted this study to investigate the effect of two critical polymorphisms (rs1805794 and rs13312840) in NBS1 on treatment response and prognosis of advanced non-small cell lung cancer (NSCLC) patients with platinum-based chemotherapy. Methods: Using TaqMan methods, we genotyped the two polymorphisms in 147 NSCLC patients. Odds ratios (ORs) and their 95% confidential intervals (CIs) were calculated as a measure of difference in the response rate of platinum-based chemotherapy using logistic regression analysis. The Kaplan-Meier and log-rank tests were used to assess the differences in progression-free survival (PFS) and overall survival (OS). Cox proportional hazards model was applied to assess the hazard ratios (HRs) for PFS and OS. Results: Neither of the two polymorphisms was significantly associated with treatment response of platinum-based chemotherapy. However, patients carrying the rs1805794 CC variant genotype had a significantly improved PFS compared to those with GG genotype (16.0 vs. 8.0 months, P = 0.040). Multivariable cox regression analysis further showed that rs1805974 was a significantly favorable prognostic factor for PFS [CC/CG vs. GG: Adjusted HR = 0.62, 95% CI: 0.39-0.99; CC vs. CG/GG: Adjusted HR = 0.56, 95% CI: 0.32-0.97). Similarly, rs13312840 with a small sample size also showed a significant association with PFS (CC vs. CT/TT: Adjusted HR = 25.62, 95% CI: 1.53-428.39). Conclusions: Our findings suggest that NBS1 polymorphisms may be genetic biomarkers for NSCLC prognosis especially PFS with platinum-based chemotherapy in the Chinese population.

Protection and Inheritance of Local Dramas in China - A Case Study of Liuqin Troupe in Pizhou City -

( Xu Jia Wei ),( Fang Xiu Qing ) 한국동양예술학회 2021 동양예술 Vol.52 No.-

본 연구는 중국 무형문화유산인 유금희(柳琴戲)의 발전 현상을 통하여, 그것이 중국 지방극의 보호 및 전승에 대해 갖는 시사점 분석에 목적을 둔다. 본 논문은 피저우시(邳州市)의 유금희 악단에 대한 사례 분석을 통하여, 총, ‘정부 성과’, ‘희극 본체’, ‘실천 주체’의 세 가지 측면으로 중국 지방극의 연구가 갖는 시사점에 대해 심층 분석하였으며, 극단의 관리자에 대한 인터뷰 조사를 통해 유금희가 지방에서 발전해온 면모를 전면적으로 재현하였다. 연구의 내용은 중국 특색 사회주의 제도에 기초하여 통일성을 갖는 반면, 한 걸음 더 나아가 직관적으로 중국 지방극의 발전에 있어, 보편적으로 존재하는 문제점을 반영하였다. 본 연구의 결과는, 첫째, ‘정부 성과’ 측면이다. 지방극은 중국 정부의 적극적인 추진 정책의 기초 위에서 왕성한 발전을 거두었다. 정부는 지방극의 발전 조건을 충족시키는 동시에 정부 간섭을 줄임으로써 발전 공간을 제공하였다. 둘째, ‘희극 본체’ 측면이다. 극의 창작은 지방극의 특색을 보전한다는 전제하에 최대한 ‘동질화(同質化)’ 형성을 피하고 연출 공간이 민간에서 활약되도록 하였다. 셋째, ‘실천 주체’ 측면이다. 이는 구체적으로, 원로 예술인의 발굴 및 보호, ‘사도전승(师徒传承)’으로의 회귀, 신예 예술인의 육성 강화 및 관중의 다양한 요구 만족 및 관중 모집 등을 포함한다. 본 연구의 의의는 중국 지방극에 대한 전승과 보호에서부터 심층 해석 및 확장 해석을 돕는다. 또한, 연구의 참고자료로서 ‘살아 있는 전승’인 무형 문화유산의 분석과 연구에 활용될 수 있다. This study aims to explore the enlightenment of Liuqin Drama on the protection and inheritance of Chinese local dramas by analyzing the development status of Liuqin Drama, China’s intangible cultural heritage. A case study of Pizhou Liuqin Troupe has been conducted from three aspects: “government actions”, “drama as the subject”, and “practice subject”. Besides, visit and interview against the management of the troupe have been conducted. Collectively, this has restored the appearance of Liuqin Drama in the local development. Based on the socialist system with Chinese characteristics, the development background of the research content is unified to directly reflect the widespread problems in the development of Chinese local drama. Research on Chinese local drama demonstrates that regarding “government actions”, Chinese local drama has developed vigorously on the basis of the government’s active policies. To satisfy its development, the government supports its development and reduces political interference. In terms of “drama as the subject”, the production of “homogenization” should be avoided while the performance space should be active in the folk for local dramas on the premise of retaining the characteristics of local dramas. Respecting “practice subject”, they try to discover and protect old artists, return to the mode of “inheritance from master to apprentice”, and accelerate the cultivation and training of new artists. Moreover, it should meet the diverse needs of the audience and cultivate the audience. The results of this study are bound to enable people to deeply interpret and expand the inheritance and protection of Chinese local dramas. It can be the reference materials for the research on the intangible cultural heritage of “living state” inheritance.

Analysis of Rural Tourism Service Quality and improvement Countermeasures of Shandong Province

Xu, Jia,Sun, Fengzhi 한중경제문화학회 2015 한중경제문화연구 Vol.4 No.-

Tourism service quality is the lifeline for the survival of tourism enterprises , which is the core embodiment of the competitiveness of tourism enterprises. Based on the perspective of tourists perceived value, this paper aimed to analyze the quality of rural tourism of Shandong province, it indentified the effect factors of tourist service quality from two research perspective: the impact to the expectations before the tourists travel process and the experience during tourists travel the process. And then, through the analysis of problems existing in the rural tourism service of Shandong province, it put forward the relative countermeasures.