Mechanical Performance of Vegetation-Growing Concrete Reinforced by Palm Fibers under Triaxial Compression

Xiaole Huang,Yu Ding,Wennian Xu,Shiyuan Xiong,Liming Liu 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.12

Fibers have been widely applied to improve the mechanical properties of natural soil and traditional cemented soils, but rarely investigated in substrates for slope eco-protection. Vegetation-growing concrete (VC) substrate is a kind of ecological cemented soil and has very wide popularization and application prospects. In this study, unconsolidated-undrained (UU) triaxial compression tests were conducted on the control specimens of VC substrate containing three cement contents and the palm fiber reinforced specimens manufactured by adding four fiber contents. The control specimens were shown to possess increasing yield strength, ultimate strength, yield strain and shear modulus with cement content, which resulted from the cemented texture improved by the hydrate products as recognized previously. Instead of inextensible reinforcement provided by cement, the palm fibers were found to provide extensible reinforcement, through which the obvious softening behavior of VC substrate could transfer to elasto-plasticity. Attributed to the unique ductility, the fibers added could bring with considerable increase in ductility of reinforced substrate, except for additional increases in yield strength, ultimate strength and yield strain.

Circular RNA expression profiles in the porcine liver of two distinct phenotype pig breeds

Huang, Minjie,Shen, Yifei,Mao, Haiguang,Chen, Lixing,Chen, Jiucheng,Guo, Xiaoling,Xu, Ningying Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.6

Objective: An experiment was conducted to identify and characterize the circular RNA expression and metabolic characteristics in the liver of Jinhua pigs and Landrace pigs. Methods: Three Jinhua pigs and three Landrace pigs respectively at 70-day were slaughtered to collect the liver tissue samples. Immediately after slaughter, blood samples were taken to detect serum biochemical indicators. Total RNA extracted from liver tissue samples were used to prepare the library and then sequence on HiSeq 2500. Bioinformatic methods were employed to analyze sequence data to identify the circRNAs and predict the potential roles of differentially expressed circRNAs between the two breeds. Results: Significant differences in physiological and biochemical traits were observed between growing Jinhua and Landrace pigs. We identified 84,864 circRNA candidates in two breeds and 366 circRNAs were detected as significantly differentially expressed. Their host genes are involved in lipid biosynthetic and metabolic processes according to the gene ontology analysis and associated with metabolic pathways. Conclusion: Our research represents the first description of circRNA profiles in the porcine liver from two divergent phenotype pigs. The predicted miRNA-circRNA interaction provides important basis for miRNA-circRNA relationships in the porcine liver. These data expand the repertories of porcine circRNA and are conducive to understanding the possible molecular mechanisms involved in miRNA and circRNA. Our study provides basic data for further research of the biological functions of circRNAs in the porcine liver.

Hydrothermal Synthesis of CrO2 Nanoparticle Arrays on Ti nano-pit Array Templates

Xiaoling Wang,Lu Wang,Tao Lin,Hailiang Huang,Gehui Wen 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.1

Chromium dioxide (CrO2) nanoparticle arrays were fabricated on Ti nano-pit array templates by hydrothermal synthesis using CrO3 aqueous solution as precursor. The Ti nano-pit array template was obtained by stripping TiO2 nanotube array formed on the Ti foil. CrO2 nanoparticles are arranged in honeycomb pattern in a large area and their surface density reaches 1.5 x 10 10 cm -2. The CrO2 nanoparticle arrays show typical magnetic behavior, and the easy axis is parallel to the plane of Ti nano-pit array template. The influence of the concentration of CrO3 aqueous solution on the CrO2 nanoparticle arrays is studied and the mechanism of the formation of the CrO2 nanoparticle arrays is briefly discussed.

Integrated mRNA and miRNA profile expression in livers of Jinhua and Landrace pigs

Minjie Huang,Lixing Cheng,Yifei Shen,Jiucheng Chen,Xiaoling Guo,Ningying Xu 아세아·태평양축산학회 2019 Animal Bioscience Vol.32 No.10

Objective: To explore the molecular mechanisms of fat metabolism and deposition in pigs, an experiment was conducted to identify hepatic mRNAs and miRNAs expression and determine the potential interaction of them in two phenotypically extreme pig breeds. Methods: mRNA and miRNA profiling of liver from 70-day Jinhua (JH) and Landrace (LD) pigs were performed using RNA sequencing. Blood samples were taken to detect results of serum biochemistry. Bioinformatics analysis were applied to construct differentially expressed miRNA-mRNA network. Results: Serum total triiodothyronine and total thyroxine were significantly lower in Jinhua pigs, but the content of serum total cholesterol (TCH) and low-density lipoprotein cholesterol were strikingly higher. A total of 467 differentially expressed genes (DEGs) and 35 differentially expressed miRNAs (DE miRNAs) were identified between JH and LD groups. Gene ontology analysis suggested that DEGs were involved in oxidation-reduction, lipid biosynthetic and lipid metabolism process. Interaction network of DEGs and DE miRNAs were constructed, according to target prediction results. Conclusion: We generated transcriptome and miRNAome profiles of liver from JH and LD pig breeds which represent distinguishing phenotypes of growth and metabolism. The potential miRNA-mRNA interaction networks may provide a comprehensive understanding in the mechanism of lipid metabolism. These results serve as a basis for further investigation on biological functions of miRNAs in the porcine liver.

From a secondary place to a central one -On Yan Emperor`s Gaining Increasing Respect-

황소영 ( Huang Xiaoling ) 동방비교연구회 (구 한국동방문학비교연구회) 2015 동방문학비교연구 Vol.5 No.-

중국인을 흔히 염황자손(炎黃子孫)이라 일컫는데, ``염황`이란 염제(炎帝)와 황제(黃帝)를 가리키는 말이다. 이때 염제와 황제는 중국인의 시조이자 중화문명(中華文明)의 기원으로 여겨지는 존재이다. 그러나 중국인이 처음부터 그들을 염황자손으로 자칭했던 것은 아니다. 황제가 처음부터 조상으로서의 이미지가 강했던 데 비해 염제는 조상으로 인정받고 있지만 황제처럼 그 이미지가 강하지 않았기 때문이다. 그러면 염제는 어떠한 인식의 변화를 거쳐 지금의 위상에 다다른 것인가? 본고는 20세기 70년대 후반부터 90년대까지 나타난 중국의 염제 연구를 중심으로 중국이 염제에 대한 인식의 변화와 그 원인에 대하여 고찰했다. 우선청말부터 1970년대 중반까지 지식인들의 염제에 대한 인식을 검토했는데, 이들이 고전문헌을 그대로 믿거나 아예 부정하는 두 가지 태도로 한편으로는 염제를 반신반인의 존재로 여기고 한편으로는 상상의 존재로 여겨지기도 했다. 그리고 대부분 학자들은 시조의 존재로서 황제에만 치중하고 염제는 거의 언급하지 않거나 언급해도 그리 중시하지 않았다. 즉 염제는 황제의 부수적인 존재, 주변부적인 존재로 지속되었다. 이러한 현상은 중국 개혁 개방(改革開放)전까지 지속되었다. 하지만 1970년대 후반부터 90년대까지 염제는 조상으로 자리매김 되었다. 우선 ``염황자손`이란 용어의 정착 과정을 통해 이를 고찰했다. 이 시대 전에 ``황제자손(黃帝子孫)`, ``황염자손(黃炎子孫)`이라는 용어도 ``염황자손`과 함께 사용되었는데 이 시대에 와서 점점 ``염황자손`이란 용어로 대체되어 사용하지 않게 되었다. 이것은 바로 염제의 조상으로서의 성격을 인정해준 징표이다. 이외에 여행사업의 발전과 더불어 염제 고장에 대한 연구와 염제 고장으로 가정한 지역에서 하는 학술대회와 홍보활동 등도 활발하게 진행되었다. 이것은 염제 고장으로서의 정당성을 확보하고 여행 사업을 통해 경제적 발전을 도모하기 위해서이다. 염제의 부상 원인은 아래 몇 가지로 꼽을 수 있다. 첫째, 염제와 신농(神農)이 같은 인물이라는 것이 대부분 중국학자에게 인정을 받았다. 이것은 염제의 중국인의 시조와 논경, 문명의 시조로서의 자리를 확고히 해준다. 둘째, 의고학파의 관점에 대한 수정의 일환으로 새로운 각도에서 염제를 연구하기 시작했다. 염제의 정체성에 대한 논의를 통해서 염제는 역사적으로 존재했던 염제신농씨가 중국 상고 농업 문명의 시조가 되고 중국인의 시조가 되었다는 것을 입증하고자 했다. 셋째, 염제의 부상은 그와 황제, 이 둘 사이의 이원론적인 성격과도 연관된다. 이 둘 사이의 이원론은 전 시대의 중황경염(重黃輕炎)의 원인으로 나타나지만 개혁 개방 이후로부터 염제가 부상되고 호명된 원인으로 전환되었다. 넷째, 고고학의 발견은 염제의 논경 시조로서의 역할을 재확인해주며 중국 문명의 역사를 위로 거슬러 올라가도록 하여 중국이 유구한 문명의 역사를 가지고 있다는 것을 증명해 준다. 즉 염제는 문명의 표상을 넘어 세계의 어느 나라에도 뒤쳐지지 않는 유구한 문명의 표상으로 부상되고 호명되었다. 다섯째, 개혁 개방을 실시하는 동시에 그로 인한 외국 문화의 유입을 대비하기 위해서라도 염황이제(炎黃二帝)를 내세우며 강조할 필요가 있었다. 이 역시염제 부상의 원인의 하나라고 생각한다. The Chinese people often claim themselves to be descendants of Yandi and Huangdi - two rulers of China in remote antiquity. Yandi and Huangdi are regarded as the ancestors of the Chinese people, as well as the origin of Chinese civilization. While Huangdi has had a clear image since ancient times, Yandi`s status as the ancestor of the Chinese people is not as high as that of Huangdi. This paper is aimed to sort out changes in opinions of Chinese academia and the Chinese people towards Yandi embodied in published papers on Yandi from the latter half of 1970s to the 1990s. It`s found that scholars from the late Qing Dynasty to the mid 1970s were divided into two groups: one group recognized classical literature before the Han Dynasty while the other flatly denied it. As a result, Yandi became a semi-God or imaginary and fictitious being in their studies. Besides, most scholars paid their attention mainly on Huangdi; studies on Yandi were scarce. It can be concluded that compared with Huangdi, Yandi had been just a peripheral and subordinate existence in the Chinese history for a very long time. Huangdi had been regarded as superior to Yandi for a long period. The period from the start of reform and opening in the late 1970s until the 1990s witnessed the gradual increase of Yandi`s status as the ancestor of the Chinese people. Starting with discussing why the Chinese people gradually claim themselves to be descendants of Yandi and Huangdi, this part will explore the changes in the Chinese people`s views towards Yandi. Prior to this period, the Chinese people also claim themselves to be "descendants of Huangdi" or "descendants of Huangdi and Yandi". After this period, these expressions were gradually replaced by "descendants of Yandi and Huangdi" and were no longer used. It is a proof that Yandi`s status as the ancestor of the Chinese people is recognized and he enjoys the same status as Huangdi. The development of tourism also boosted the publicity of Yandi`s hometown and the organization of academic conferences, whose major purpose was to secure the town`s legitimacy as Yandi`s native place and promote local economic development. Finally, the reasons why the status of Yandi has been raised are discussed. First of all, there is a consensus among the academia that Yandi and Shennong (the Holy Farmer) are the same person. Yandi together with Huangdi is considered to be real figures or clans in history, which further established the position of Yandi as the ancestor of the Chinese people and the farming ancestor. Second, scholars in the period corrected parts of views of the skeptical-about-ancient school and studied Yandi from a new perspective. They began to regard Yandi as a true figure in history rather than a semi-God or imaginary and fictitious being. Third, in my opinion, the elevation of Yandi`s status is also closely linked with the dual nature of Yandi and Huangdi, the development of agricultural archeology and China`s reform and opening-up policy. As the embodiment of agriculture and laborers, Yandi along with agriculture and laborers has drawn more attention than before. Fourth, achievements in archeology have further confirmed Yandi`s image of God of Agriculture. The Chinese history of civilization dates back to an earlier period because of Yandi -- a symbol of clans and economic development of farming civilization. As a human ancestor, Yandi not only attests to China`s long history of civilization, but also shows that China has a history as long and civilized as other countries. Emphasis on Yandi is one characteristic of Chinese modern nationalism. Fifth, the impact of foreign cultures brought by reform and opening up, on the other hand, has promoted the research on Yandi and Huangdi.

Deterioration in strength of studs based on two-parameter fatigue failure criterion

Bing Wang,Qiao Huang,Xiaoling Liu 국제구조공학회 2017 Steel and Composite Structures, An International J Vol.23 No.2

In the concept of two-parameter fatigue failure criterion, the material fatigue failure is determined by the damage degree and the current stress level. Based on this viewpoint, a residual strength degradation model for stud shear connectors under fatigue loads is proposed in this study. First, existing residual strength degradation models and test data are summarized. Next, three series of 11 push-out specimen tests according to the standard push-out test method in Eurocode-4 are performed: the static strength test, the fatigue endurance test and the residual strength test. By introducing the "two-parameter fatigue failure criterion," a residual strength calculation model after cyclic loading is derived, considering the nonlinear fatigue damage and the current stress condition. The parameters are achieved by fitting the data from this study and some literature data. Finally, through verification using several literature reports, the results show that the model can better describe the strength degradation law of stud connectors.

Study on stiffness deterioration in steel-concrete composite beams under fatigue loading

Bing Wang,Qiao Huang,Xiaoling Liu,Yong Ding 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.34 No.4

The purpose of this paper is to investigate the degradation law of stiffness of steel-concrete composite beams after certain fatigue loads. First, six test beams with stud connectors were designed and fabricated for static and fatigue tests. The resultant failure modes under different fatigue loading cycles were compared. And an analysis was performed for the variations in the load-deflection curves, residual deflections and relative slips of the composite beams during fatigue loading. Then, the correlations among the stiffness degradation of each test beam, the residual deflection and relative slip growth during the fatigue test were investigated, in order to clarify the primary reasons for the stiffness degradation of the composite beams. Finally, based on the stiffness degradation function under fatigue loading, a calculation model for the residual stiffness of composite beams in response to fatigue loading cycles was established by parameter fitting. The results show that the stiffness of composite beams undergoes irreversible degradation under fatigue loading. And stiffness degradation is associated with the macrobehavior of material fatigue damage and shear connection degradation. In addition, the stiffness degradation of the composite beams exhibit S-shaped monotonic decreasing trends with fatigue cycles. The general agreement between the calculation model and experiment shows good applicability of the proposed model for specific beam size and fatigue load parameters. Moreover, the research results provide a method for establishing a stiffness degradation model for composite beams after fatigue loading.

Comparison of Static and Fatigue Behaviors between Stud and Perfobond Shear Connectors

Bing Wang,Qiao Huang,Xiaoling Liu 대한토목학회 2019 KSCE Journal of Civil Engineering Vol.23 No.1

This paper presents an experimental evaluation for comparison of the behaviors of stud and Perfobond shear connectors under static and fatigue loading based on 20 push-out tests. The push-out tests for each type of shear connectors including three series: static tests, fatigue endurance tests and residual mechanical properties test, respectively. In static tests, the failure modes of two types of connectors are different. The elastic stiffness and ultimate slip in the load-slip curves of the Perfobond are larger than that of stud. In fatigue endurance tests, the fatigue life of the studs is 2.68 million, while the Perfobond specimens do not fail after 3.0 million numbers of cycles under the same test conditions as studs'. Compared with the stud, the relative-slip of Perfobond increased sharply in the early period. In residual mechanical properties tests, the residual bearing capacity, shear stiffness and ductility are presented and discussed. The variation rules of these three indexes for two types of connectors are the same, while the indexes of Perfobond are much larger than stud’s throughout the process. The results indicate that Perfobond connector has good ductility, better fatigue resistance and higher safety reliability. However, the economy of Perfobond connectors is not as good as studs’.

Realizing the empirical mode decomposition by the adaptive stochastic resonance in a new periodical model and its application in bearing fault diagnosis

Jingling Zhang,Dawen Huang,Jianhua Yang,Hou-guang Liu,Xiaole Liu 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.10

We investigate a multi-frequency signal that cannot be decomposed by empirical mode decomposition directly. Moreover, this kind of signal in the noisy background cannot be decomposed successfully by the traditional stochastic resonance with bistable system yet. We propose a new method which using the empirical mode decomposition combined the adaptive stochastic resonance in a new periodical model to solve this problem. The results show that the proposed method decomposes the multi-frequency signal perfectly. Meanwhile, the general scale transformation and random particle swarm optimization algorithm are used to help obtain a better result in the process of optimization. Through using this new method, the simulation results are satisfactory. More importantly, this new method also shows good performance in the application of bearing fault diagnosis.

The impact of lymph node dissection on survival in patients with clinical early-stage ovarian cancer

Ting Deng,Qidan Huang,Ting Wan,Xiaoling Luo,Yanling Feng,He Huang,Jihong Liu 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.3

Objective: To estimate the impact of lymph node dissection on survival in patients withapparent early-stage epithelial ovarian cancer (EOC). Methods: We conducted a retrospective review of patients with clinical stage I–II EOC. Allpatients underwent primary surgery at Sun Yat-sen University Cancer Center between January2003 and December 2015. Demographic features and clinicopathological information as wellas perioperative adverse events were investigated, and survival analyses were performed. Results: A total of 400 ovarian cancer patients were enrolled, and patients were divided into2 groups: 81 patients did not undergo lymph node resection (group A), and 319 patientsunderwent lymph node dissection (group B). In group B, the median number of removednodes per patient was 25 (21 pelvic and 4 para-aortic nodes). In groups A and B, respectively,the 5-year progression-free survival (PFS) rates were 83.3% and 82.1% (p=0.305), and the5-year overall survival (OS) rates were 93.1% and 90.9% (p=0.645). The recurrence rate inthe retroperitoneal lymph nodes was not associated with lymph node dissection (p=0.121). The median operating time was markedly longer in group B than in group A (220 minutesvs. 155 minutes, p<0.001), and group B had a significantly higher incidence of lymph cysts atdischarge (32.9% vs. 0.0%, p<0.001). Conclusion: In patients with early-stage ovarian cancer, lymph node dissection was notassociated with a gain in OS or PFS and was associated with an increased incidence ofperioperative adverse events.