• 제목/요약/키워드: Xi Ming

검색결과 101건 처리시간 0.027초

Evaluating LIMU System Quality with Interval Evidence and Input Uncertainty

  • Xiangyi Zhou;Zhijie Zhou;Xiaoxia Han;Zhichao Ming;Yanshan Bian
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • 제17권11호
    • /
    • pp.2945-2965
    • /
    • 2023
  • The laser inertial measurement unit is a precision device widely used in rocket navigation system and other equipment, and its quality is directly related to navigation accuracy. In the quality evaluation of laser inertial measurement unit, there is inevitably uncertainty in the index input information. First, the input numerical information is in interval form. Second, the index input grade and the quality evaluation result grade are given according to different national standards. So, it is a key step to transform the interval information input by the index into the data form consistent with the evaluation result grade. In the case of uncertain input, this paper puts forward a method based on probability distribution to solve the problem of asymmetry between the reference grade given by the index and the evaluation result grade when evaluating the quality of laser inertial measurement unit. By mapping the numerical relationship between the designated reference level and the evaluation reference level of the index information under different distributions, the index evidence symmetrical with the evaluation reference level is given. After the uncertain input information is transformed into evidence of interval degree distribution by this method, the information fusion of interval degree distribution evidence is carried out by interval evidential reasoning algorithm, and the evaluation result is obtained by projection covariance matrix adaptive evolution strategy optimization. Taking a five-meter redundant laser inertial measurement unit as an example, the applicability and effectiveness of this method are verified.

Comparison of Gadobenate Dimeglumine and Gadopentetate Dimeglumine for Breast MRI Screening: a Meta-analysis

  • Yang, Xiao-Ping;Han, Yue-Dong;Ye, Jian-Jun;Chen, Gang;Luo, Ying;Ma, Hong-Xia;Yu, Xue-Wen;Niu, Juan-Qin;Ren, Fang-Yuan;Guo, You-Ming
    • Asian Pacific Journal of Cancer Prevention
    • /
    • 제15권12호
    • /
    • pp.5089-5095
    • /
    • 2014
  • Background: As a common and essential contrast medium at present, gadobenate dimeglumine has shown better performance than some other agents when applied to Breast Magnetic Resonance Imaging Screening (Breast MRI Screening). Nevertheless, reports on the diagnostic performance of these two mediums (gadobenate dimeglumine and gadopentetate dimeglumine) are not completely consistent. Objective: To assess the diagnostic value of gadobenate dimeglumine and gadopentetate dimeglumine for Breast MRI Screening in patients suffering from breast cancer and to provide more convinced evidence to guide clinical practice in terms of appropriate contrast agents. Data Sources and Review Methods: Original articles in English and Chinese published before January 2013 were selected from available databases (The Cochrane Library, PUBMED, EMBASE, Chinese Biomedical Literature Database, Chinese Scientific Journals Full-text Database, Chinese Journal Full-text). The criteria for inclusion and exclusion were based on the standard for diagnosis tests. Meta-Disc software (Version 1.4) was used for data analysis. Then, the area under curve (AUC) of SROC and the spearman rank correlation of sensitivity against (1-specificity) were calculated. Results: Total of 17 researches involving 1934 patients were included. The pooled sensitivity of gadobenate dimeglumine and gadopentetate dimeglumine were 0.99 (0.97, 1.00) and 0.93 (0.88, 1.00) respectively. The pooled specificity for these two contrast agents were 0.924 (0.902, 0.943) and 0.838 (0.817, 0.858) respectively, and the AUC of SROC curve were 0.9781 and 0.9215 respectively. Conclusions: Gadobenate dimeglumine can be regarded as a more effective and feasible contrast medium for Breast MRI Screening. At least 5% differences in diagnostic performance are usually considered as clinically relevant.

Shake table test of Y-shaped eccentrically braced frames fabricated with high-strength steel

  • Lian, Ming;Su, Mingzhou
    • Earthquakes and Structures
    • /
    • 제12권5호
    • /
    • pp.501-513
    • /
    • 2017
  • To investigate the seismic performance of Y-shaped eccentrically braced frames fabricated with high-strength steel (Y-HSS-EBFs), a shake table test of a 1:2 scaled three-story Y-HSS-EBF specimen was performed. The input wave for the shake table test was generated by the ground motions of El Centro, Taft, and Lanzhou waves. The dynamic properties, acceleration, displacement, and strain responses were obtained from the test specimen and compared with previous test results. In addition, a finite element model of the test specimen was established using the SAP2000 software. Results from the numerical analysis were compared with the test specimen results. During the shake table test, the specimen exhibited sufficient overall structural stiffness and safety but suffered some localized damage. The lateral stiffness of the structure degenerated during the high seismic intensity earthquake. The maximum elastic and elastoplastic interstory drift of the test specimen for different peak ground accelerations were 1/872 and 1/71, respectively. During the high seismic intensity earthquake, the links of the test specimen entered the plastic stage to dissipate the earthquake energy, while other structural members remained in the elastic stage. The Y-HSS-EBF is a safe, dual system with reliable seismic performance. The numerical analysis results were in useful agreement with the test results. This finding indicated that the finite element model in SAP2000 provided a very accurate prediction of the Y-HSS-EBF structure's behavior during the seismic loadings.

손일규(孫一奎)의 화열병기학설(火熱病機學說)에 대한 고찰(考察) (A Study on Sun Yi-Kui(孫一奎)'s "Fire.heat-disease-mechanism(火熱病機)" Theory)

  • 김용주;백유상;정창현
    • 대한한의학원전학회지
    • /
    • 제20권2호
    • /
    • pp.289-313
    • /
    • 2007
  • Many of newly emerging diseases such as hypertension, stroke, diabetes, obesity, and atoptic dermatities are categorized into "Fire heat-disease(火熱病)" according to oriental medicine. It is because factors such as stress, overeating, and high fat diet are major causes of heat in the human body. Sun Yi-Kui(孫一奎), a well-known oriental medical doctor during Ming Dynasty's "Jia Jing Wan Li Nian Jian"(嘉靖萬歷年間 : A.D $1522^{\sim}1619$), established new theories on "Fire heat-disease-mechanism(火熱病機)". This study aims to investigate Dr. Sun's "Fire heat-disease-mechanism(火熱病機)"theory. For this purpose, I thoroughly examined the concepts of "Dong-Qj(動氣)", "Ming-Men(命門)", king fire(君火) and minister fire(相火) as well as pathological theory on "Fire heat(火熱)". In addition, I compared Sun's theory with those of Li Dong-yuan and Zhu dan-Xi.

  • PDF

17세기(世紀) 동(東)아시아 3국(國)의 『대학(大學)』관(觀) 고찰(考察) (A study about Views of the Great Learning(大學) of the Three Countries in East Asia at 17th Century)

  • 이용수
    • 동양고전연구
    • /
    • 제36호
    • /
    • pp.265-299
    • /
    • 2009
  • "대학"은 한 중 일을 포함한 동아시아인들의 정치 사상 사회 문화 전반에 걸쳐 지대한 영항을 끼친 유가 사상의 진수를 담고 있는 경전이다. 특히 일본의 경우, 도쿠가와(德川) 시대로 접어들기 이전부터 퇴계학이 소개되고 있고, 도쿠가와 시대에는 주자학이 학문적으로 배타적 영향력을 행사하면서 "대학"의 중요성도 상대적으로 부각되기 시작한다. 도쿠가와 시대 일본 유학의 특징은 있는 그대로의 현실세계를 중시하는 가운데, 경서에 대한 철저한 재해석을 중심으로 학문적으로 성장하게 된다. 이런 가운데 17세기 조선조에서도 백호 윤휴, 서계 박세당 등이 주자의 주석에 반기를 들면서 "대학"에 대한 새로운 해석을 시도하게 된다. 명말청초로 넘어가는 동시대의 중국에서도 황종희, 고염무, 왕부지를 중심으로 하여 비슷한 학문적 경향을 보이게 된다. 즉 허를 배격하고 실을 중시하는 실질적인 학문관이 17세기 초 중기 동양 3국에 공통하는 사상적 조류였던 것이다. 본고의 목적은 도쿠가와 시대 초중기 학자들의 사상체계의 구조를 파악할 수 있는 큰 단서가 되는 경서에 대한 이해와 태도, 특히 "대학"에 대한 태도가 도쿠가와 시대의 사상사 가운데 어떤 의미를 갖고 있는지를, 나아가 그것이 일본인들이 사유구조와 삶에 어떤 영향을 끼쳤는지를 알아보는 것이며, 그들의 "대학"관이 동시대 조선과 중국의 명말청초 시대의 그것과 비교할 때 어떤 특징을 갖는지를 살펴보는 것이다.

Creep properties and damage model for salt rock under low-frequency cyclic loading

  • Wang, Jun-Bao;Liu, Xin-Rong;Liu, Xiao-Jun;Huang, Ming
    • Geomechanics and Engineering
    • /
    • 제7권5호
    • /
    • pp.569-587
    • /
    • 2014
  • Triaxial compression creep tests were performed on salt rock samples using cyclic confining pressure with a static axial pressure. The test results show that, up to a certain time, changes in the confining pressure have little influence on creep properties of salt rock, and the axial creep curve is smooth. After this point, the axial creep curve clearly fluctuates with the confining pressure, and is approximately a straight line both when the confining pressure decreases and when it increases within one cycle period. The slope of these lines differs: it is greater when the confining pressure decreases than when it increases. In accordance with rheology model theory, axial creep equations were deduced for Maxwell and Kelvin models under cyclic loading. These were combined to establish an axial creep equation for the Burgers model. We supposed that damage evolution follows an exponential law during creep process and replaced the apparent stress in creep equation for the Burgers model with the effective stress, the axial creep damage equation for the Burgers model was obtained. The model suitability was verified using creep test results for salt rock. The fitting curves are in excellent agreement with the test curves, so the proposed model can well reflect the creep behavior of salt rock under low-frequency cyclic loading. In particular, it reflects the fluctuations in creep deformation and creep rate as the confining pressure increasing and decreasing under different cycle periods.

HCBP6 upregulates human SREBP1c expression by binding to C/EBPβ-binding site in the SREBP1c promoter

  • Yang, Xueliang;Han, Ming;Liu, Shunai;Yuan, Xiaoxue;Liu, Xiaojing;Feng, Shenghu;Zhou, Li;Li, Yaru;Lu, Hongping;Cheng, Jun;Lin, Shumei
    • BMB Reports
    • /
    • 제51권1호
    • /
    • pp.33-38
    • /
    • 2018
  • Sterol regulatory element-binding protein-1c (SREBP1c) plays an important role in triglyceride (TG) homeostasis. Although our previous study showed that hepatitis C virus core-binding protein 6 (HCBP6) regulates SREBP1c expression to maintain intracellular TG homeostasis, the mechanism underlying this regulation is unclear. In the present study, we found that HCBP6 increased intracellular TG levels by upregulating SREBP1c expression. HCBP6 increased SREBP1c transcription by directly binding to the SREBP1c promoter (at the -139- to +359-bp region). Moreover, we observed that HCBP6 interacted with $C/EBP{\beta}-binding$ site in the SREBP1c promoter both in vitro and in vivo. These results indicate that HCBP6 upregulates human SREBP1c expression by binding to the $C/EBP{\beta}-binding$ site in the SREBP1c promoter.

Cyclic loading behavior of high-strength steel framed-tube structures with replaceable shear links constructed using Q355 structural steel

  • Guo, Yan;Lian, Ming;Zhang, Hao;Cheng, Qianqian
    • Steel and Composite Structures
    • /
    • 제42권6호
    • /
    • pp.827-841
    • /
    • 2022
  • The rotation capacities of the plastic hinges located at beam-ends are significantly reduced in traditional steel framed-tube structures (SFTSs) because of the small span-to-depth ratios of the deep beams, leading to the low ductility and energy dissipation capacities of the SFTSs. High-strength steel framed-tube structures with replaceable shear links (HSSFTS-RSLs) are proposed to address this issue. A replaceable shear link is located at the mid-span of a deep spandrel beam to act as a ductile fuse to dissipate the seismic energy in HSSFTS-RSLs. A 2/3-scaled HSSFTS-RSL specimen with a shear link fabricated of high-strength low-alloy Q355 structural steel was created, and a cyclic loading test was performed to study the hysteresis behaviors of this specimen. The test results were compared to the specimens with soft steel shear links in previous studies to investigate the feasibility of using high-strength low-alloy steel for shear links in HSSFTS-RSLs. The effects of link web stiffener spaces on the cyclic performance of the HSSFTS-RSLs with Q355 steel shear links were investigated based on the nonlinear numerical analysis. The test results indicate that the specimen with a Q355 steel shear link exhibited a reliable and stable seismic performance. If the maximum interstory drift of HSSFTS-RSL is designed lower than 2% under earthquakes, the HSSFTS-RSLs with Q355 steel shear links can have similar seismic performance to the structures with soft steel shear links, even though these shear links have similar shear and flexural strength. For the Q355 steel shear links with web height-to-thickness ratios higher than 30.7 in HSSFTS-RSLs, it is suggested that the maximum intermediate web stiffener space is decreased by 15% from the allowable space for the shear link in AISC341-16 due to the analytical results.

주단계(朱丹溪) 의학사상(醫學思想)의 배경(背景)에 관한 연구(硏究) -"격치여론(格致餘論)"을 중심(中心)으로- (A research on the background of ZhuDanXi(朱丹溪)‘s medical theory -Based on ${\ulcorner}$GeZhiYuLun(格致餘論)${\lrcorner}$-)

  • 박현국;김기욱
    • 대한한의학원전학회지
    • /
    • 제18권4호통권31호
    • /
    • pp.1-14
    • /
    • 2005
  • Zhu Dan Xi's name is ZhenHeng(震亨) and was also called by the title of YanXiu(彦修). Early in his life, he started to study JuZiYe(擧子業), and went on to study DaoDeXingMingXue(道德性命學) under the teachings of XueQian(許謙), who as one of fourth generation disciple of ZhuZi(朱子) was teaching in BaHuaShan(八華山). His well-known literary works are ${\ulcorner}$JuFangFaHui(局方發揮)${\lrcorner}$, ${\ulcorner}$GeZhiYuLun${\lrcorner}$, ${\ulcorner}$ShangHanBianYi(傷寒辨疑)${\lrcorner}$, ${\ulcorner}$BenCaoYanYiBuYi(本草衍義補遺)${\lrcorner}$, ${\ulcorner}$WaiKeJingYaoXinLun(外科精要新論)${\lrcorner}$. Zhu Dan Xi learnt the studies of Liu(劉), Zhang(張), Li(李) from LouZhiTi(羅知悌) and adopted the advantages and abolished disadvantages from it. The southern district being low and damp, which also leads to a geographical condition with a lot of ShiReXiangHuo(濕熱相火) disease and with the social background of people exhausting their QingYu(情欲) and damaging QLXie(氣血), he came out with the theory of 'YangYouYuYinBuZu(陽有餘陰不足)', 'XiangHuo(相火)' and became a well renowned expert in diagnosis and treatment of QiXieTanYuHuo(氣血痰鬱火). As a result, the writer has performed a research based on Liu's works and related theories, GuWuZhiZhi theory, the understanding of TaiJiZhiLi(太極之理), the inner meaning of YinYang and YouYuBuZu(redundancy-and-deficit), YinYangDongJingGuan, physiology and pathology, the medical reason of lust damaging QingYuYangYin and YangSheng(養生)(preservation of health), which are the main medical theory of ZhuDanXi, comments of later generations and is reporting the outcome.

  • PDF

정약용의 중용: 장악을 통한 도덕적 행위의 습관화 (Jeong Yak-Yong's Zhong-yong: The Habit of Moral Behavior Through Grasp)

  • 고명문;모아영
    • 예술인문사회 융합 멀티미디어 논문지
    • /
    • 제8권8호
    • /
    • pp.793-803
    • /
    • 2018
  • 공자가 '중용'을 언급하고 자사가 「중용」을 저술한 이래로, 특히 주희가 『소대예기』의 한 편목이었던 「중용」을 사서 중의 하나로 편집하고 재해석한 이래로 중용은 도덕의 극치로 인정되었을 뿐만 아니라 유학사상의 중요한 범주로 간주되었다. 이 논문의 목적은 '장악'과 '도덕적 행위', 그리고 '습관'이라는 세 개념을 중심으로 정약용이 어떻게 주희의 중용해석을 비판했는지를 검토하고, 더 나아가 정약용의 중용해석과 그것의 특징을 밝히는 데 있다. 주희는 중용의 중을 양단의 중간과 미발의 본연지성으로 해석하고, 용을 평상지리로 해석하여 중용을 지나치거나 미치지 못함이 없는 절대적 이치로 보았다. 따라서 주희의 중용은 사람이 구체적으로 당면한 도덕적 문제 상황에 대한 장악과 노력이 들어있지 않는 절대적 중용이라고 할 수 있다. 반면 정약용은 중을 신독하는 군자가 각고의 노력을 통해 유지하는 집중의 공부 상태와 상황에 대한 장악으로 이해하고, 용을 사람의 도덕적 행위를 꾸준히 하려는 의미가 들어있는 '항상' 혹은 '경상'으로 이해하여 중용을 장악을 통한 도덕적 행위의 습관화로 이해한다.