張弛於割據和恭順之間

Jiang Ai(張弛) 경북대학교 아시아연구소 2014 아시아연구 Vol.- No.20

2011년 북경시 房山區 長溝鎭에서 文化硅谷 건설 과정 중에 시공사가 唐 幽州 盧龍節度使 劉濟의 墓를 발견하였다. 2012에서 2013년까지 北京市文物硏究所는 劉濟墓에 대해 발굴을 시작하였다. 대량의 부장품이 출토됨과 동시에 묘 주인인 劉濟의 墓誌도 확인할 수 있었다. 2014년 6월 24일, 北京市文物局은 기자회견을 열어 房山 長溝에 있는 唐나라 劉濟 묘의 최신 고고학 발굴 성과를 발표하면서 소수의 문자를 제외하고 묘지 내용과 역사 문헌이 기본적으로 합치되는 것을 증명하였다. In 2011, the tomb of Liu Ji was discovered in Beijing. Liu Ji was a Jiedushi (administrator) of Tang Dynasty in Youzhou(also called Lulong). Later the Beijing Municipal Cultural Relics Bureau announced that the epitaph content and historical documents matched basically except for a small number of words. As a frontiers minister, Liu Ji was documented richly in the official history. Both Jiutangshu and Xintangshu covered his biography. The Prime Minister Quan wrote an epitaph for Liu Ji and included epitaph into his own essay collection. Later in Qing Dynasty, Donggao also included the whole epitaph in Quantangshu. Youzhou was a strategic town in all the towns in Tang Dynasty. It was not only where Rebellion of An and Shi took place, it also had the largest rebel force and the most intense internal competition among the three rebel towns in Hebei Dao. This paper will first compare the similarities and differences of the content of the three materials and analyze the reasons for what caused the differences. It will give an interpretation of Liu Ji’s life and verify the cause of his death. It will present his attitude towards the court-somewhere in between separatism and obedience but never lose himself. To choose between separatism and obedience, Liu Ji would first consider his own interests. Only when selfinterest coincided with the court’s order, would he demonstrate his allegiance to court.

Abortions and Breast Cancer Risk in Premenopausal and Postmenopausal Women in Jiangsu Province of China

Jiang, Ai-Ren,Gao, Chang-Ming,Ding, Jian-Hua,Li, Su-Ping,Liu, Yan-Ting,Cao, Hai-Xia,Wu, Jian-Zhong,Tang, Jin-Hai,Qian, Yun,Tajima, Kazuo Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.1

To evaluate the relationship between abortions and risk of breast cancer, we conducted a case-control study with 669 cases and 682 population-based controls in Jiangsu Province of China. A structured questionnaire was used to elicit detailed information. Unconditional logistic regression analysis was performed to calculate odds ratios (ORs) and 95% confidence intervals (CIs). The results have revealed that induced abortion was related to increased risk of breast caner. Premenopausal women who had ${\geq}3$ times of induced abortion were at increased crude OR (2.41, 95%CI: 1.09-5.42) and adjusted-OR (1.55, 95%CI: 1.15-5.68). Postmenopausal women with a previous induced abortion were at increased crude OR (2.04, 95%CI: 1.48-2.81) and adjusted-OR (1.82, 95%CI: 1.30-2.54), and there was a significant increase trend in OR with number of induced abortions (p for trend: 0.0001). Overall, spontaneous abortion did not significantly alter the risk of breast cancer, but postmenopausal women who had history of spontaneous abortion were at increased OR. These results suggested that relationship between breast cancer and abortions may depend on menopausal status and induced abortion may played an important role in the development of breast cancer in Jiangsu' women of China.

Diagentic features of illite in Upper Triassic Chang-7 tight oil sandstones, Ordos Basin

Ai Wang,Dakang Zhong,Haihua Zhu,Lele Guo,Yangjinfeng Jiang,Xueqi Yang,Rui Xie 한국지질과학협의회 2019 Geosciences Journal Vol.23 No.2

The Upper Triassic Chang-7 tight oil sandstones are the main tight clastic reservoirs in the Ordos Basin, central China. Illite is one of the most important cements affecting porosity and permeability of the tight oil sandstones, and this study focuses on different types of illitization and its relative formation time. The Chang-7 tight sandstones are mainly fine-grained lithic arkose and feldspar lithic sandstones, rich in mica and illite (hydrous mica). They are formed in distal delta front to semi-deep and deep lake facies, mainly deposited in a low energy environment. Porosity and permeability are very low (average porosity 8.58% and permeability 0.20 mD). The illite has many morphological characteristics and is multiphase, incorporating six types of illitization: hydrous mica, mica, and smectite illitization at the eodiagenetic stage, and kaolinite and K-feldspar illitization, and neoformation illite particles, at the mesodiagenetic stage. These different types of illitization are mainly controlled by sedimentary environment and provenance. Quartz overgrowth and diagenetic illites appear to be locally mutually exclusive, competing for detrital grain surfaces, but neoformation illite particles appear to form on the quartz overgrowth. The systematic study of Upper Triassic Chang-7 tight oil sandstones carried out here, enhances our understanding of illitization and the diagenetic model of the Ordos Basin, and contributes to reducing the exploration risk of continental tight sandstone reservoirs.

Residual Stress Distribution in Hard-Facing of Pressure Relief Valve Seat

Ai, Li,Yu, Xinhai,Jiang, Wenchun,Woo, Wanchuck,Ze, Xiaofeng,Tu, Shan-Tung AMERICAN SOCIETY MECHANICAL ENGINEERS 2014 Journal of Pressure Vessel Technology Vol.136 No.6

<P>In this study, for the hard-facing of spring-loaded pressure relief valve seats, the residual stress distributions after the tungsten inert gas welding, (TIG) postwelded heat treatment and subsequent surface turning were investigated. The heat input parameters of welding were calibrated using an infrared imaging and thermocouples. The residual stress distributions were computed using three-dimensional finite element model. The neutron diffraction approach was employed to verify the finite element calculation. It is found that, the surface temperature during hard-facing welding shows a double ellipsoidal shape with the highest value of around 1570 degrees C. The high residual stress zones are located exactly under the welded joint except a slight deviation in the hoop direction. The magnitudes of tensile residual stresses in the three directions increase with their corresponding locations from the root of the joint into the base metal. The residual stresses in all of the three directions decrease significantly after the heat treatment. After surface turning, the residual stresses are tensile except for those close to the inner surface that are compressive in axial and radial directions.</P>

Depositional and diagenetic controls on the reservoir quality of Upper Triassic Chang-7 tight oil sandstones, southwestern Ordos basin, China

Ai Wang,Dakang Zhong,Haihua Zhu,Lele Guo,Zhuopei Li,Yangjinfeng Jiang,Xueqi Yang,Rui Xie,Xiaowei Zheng 한국지질과학협의회 2019 Geosciences Journal Vol.23 No.3

The seventh oil layer of the Upper Triassic Yanchang Formation (Chang-7) tight oil sandstone reservoirs is a major exploration target. A significant amount of hydrocarbons has been discovered in these reservoirs in the southwestern Ordos basin in China. The Chang-7 tight sandstones are characterised as tight with low porosity, low permeability, and strong heterogeneity. This study investigates the sedimentary facies, diagenesis, and their impact on the reservoir quality of the Chang-7 tight oil sandstones. The sandstones were deposited in a deltaic-lacustrine depositional system. Three major depositional facies are identified consisting of delta front fed by braided rivers and meandering rivers, and slump turbidite fans. The depositional environment exerts a key control on reservoir quality. The distinct low-energy sedimentary environment produced fine to very fine-grained sandstones with high matrix and mica contents, characterised by low initial porosity and permeability. Diagenesis mainly comprised mechanical compaction and cementation by quartz, carbonate minerals and various clay minerals. The reservoir properties of the Chang-7 sandstones are generally poor, with porosity of 1.4–20.7% (average porosity 8.6%) and permeability of 0.001–116.7 mD (average 0.2 mD), which are attributed to significant compaction and cementation. Mechanical compaction was more important than cementation for reducing porosity, whereas secondary dissolution porosity was significant for the Chang-7 tight oil sandstones due to closer proximity to the underlying Chang-73 source rocks.

Graphite Furnace Atomic Absorption Spectrophotometric Determination of Trace Horseradish Peroxidase Using Nanosilver

Jiang, Zhi-Liang,Tang, Ya-Fang,Wei, Lin,Liang, Ai-Hui Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.8

In pH 4.2 HAc-NaAc buffer solution, horseradish peroxidase (HRP) catalyzed $H_2O_2$ oxidation of nanosilver to form $Ag^+$. After centrifugation, $Ag^+$ in the supernatant can be measured by graphite furnace atomic absorption spectrophotometry (GFAAS) at the silver absorption wavelength of 328.1 nm. When HRP concentration increased, the $Ag^+$ concentration in the supernatant increased, and the absorption value enhanced. The HRP concentration in the range of 0.84-50 $ng{\cdot}mL^{-1}$ was linear to the enhanced absorption value (${\Delta}A$), with a regression equation of ${\Delta}A$=0.012C+0.11, correlation coefficient of 0.9988, and detection limit of 0.41 $ng{\cdot}mL^{-1}$ HRP. The proposed GFAAS method was used to detect HRP in waste water samples, with satisfactory results.

Transient electrophoretic motion of a charged particle through a converging–diverging microchannel: Effect of direct current-dielectrophoretic force

Ai, Ye,Joo, Sang W.,Jiang, Yingtao,Xuan, Xiangchun,Qian, Shizhi WILEY-VCH Verlag 2009 Electrophoresis Vol.30 No.14

<P>Transient electrophoretic motion of a charged particle through a converging–diverging microchannel is studied by solving the coupled system of the Navier–Stokes equations for fluid flow and the Laplace equation for electrical field with an arbitrary Lagrangian–Eulerian finite-element method. A spatially non-uniform electric field is induced in the converging–diverging section, which gives rise to a direct current dielectrophoretic (DEP) force in addition to the electrostatic force acting on the charged particle. As a sequence, the symmetry of the particle velocity and trajectory with respect to the throat is broken. We demonstrate that the predicted particle trajectory shifts due to DEP show quantitative agreements with the existing experimental data. Although converging–diverging microchannels can be used for super fast electrophoresis due to the enhancement of the local electric field, it is shown that large particles may be blocked due to the induced DEP force, which thus must be taken into account in the study of electrophoresis in microfluidic devices where non-uniform electric fields are present.</P>

Two New Phenolic Glycosides from Curculigo orchioides

Ai-Xue Zuo,Yong Shen,Zhi-Yong Jiang,Xue-Mei Zhang,Jun Zhou,Jun Lü,Ji-Jun Chen 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.3

Two new phenolic glycosides were isolated from the rhizomes of Curculigo orchioides Gaertn.. Based on comprehensive spectroscopic analyses including IR, MS, 1D- and 2D NMR (COSY, HSQC, and HMBC), their structures were elucidated as 3-hydroxyl-5-methyphenol-1-O-[β-D-glucopyranosyl-(1→3)-β-D-glucopyranoside (1) and 1',3'-dimethoxyl-4-hydroxyalangifolioside (2).

Study on the Mechanical and Economic Performance of Super Long-Span Cable-Stayed Bridges with UHPC-Girder

Zubin Ai,Hangjun Liu,Jiaguo Zhang,Chao Zhang,Cong Wang,Zuqian Jiang,Ru-Cheng Xiao 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.11

This paper introduces the mechanical and economic performance of cable-stayed bridges with ultra-high-performance concrete (UHPC) girders. Based on the determined general layout and structure system, aiming at minimizing material consumption and considering multiple constraints, the parametric analysis and optimization process of the UHPC girder were discussed. Subsequently, full-scale models of a 1,200 m cable-stayed bridge with UHPC girders and those with steel girders were established and analyzed under load combinations to evaluate their static mechanical performance. Additionally, the material consumption estimation equation was established to evaluate the economic performance of cable-stayed bridges. The economic performance of cable-stayed bridges with UHPC-girder scheme and that of steel-girder scheme were investigated and compared by theoretical calculation and finite element modelling. The results indicated that UHPC-girder cable-stayed bridges are highly competitive for super long-span cable-stayed bridges and represent a promising alternative for the design of large-span bridges in the future. This study provides valuable insights into the feasibility and potential of UHPC-girder cable-stayed bridges.

Equilibrium, kinetic and mechanism studies on the biosorption of Cu2+ and Ni2+ by sulfur-modified bamboo powder

Tian Ai,Xiaojun Jiang,Hongmei Yu,Hong-Bo Xu,Dawei Pan,Qingyu Liu,Dongyu Chen,Jinyang Li 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.2

Two biosorbents were prepared using bamboo powder modified with mercaptoacetic acid and carbondisulfide, which exhibits strong adsorption properties for Cu2+ and Ni2+. The obtained materials were characterized byFTIR. Maximum adsorption for both metals was found to occur around pH 5.0-6.5. The kinetic data followed thepseudo-second-order model. The maximum adsorption capacities of Cu2+ and Ni2+ on mercaptoacetic acid modifiedbamboo powder determined from Langmuir isotherm were 103.97mg g−1 and 61.35mg g−1, respectively. While oncarbon disulfide modified bamboo powder were 128.21mg g−1 and 56.82mg g−1, respectively. The adsorption mechanismanalysis revealed that the most possible adsorption mode of Cu2+ was coordination, and Ni2+ was ion exchange. The obtained adsorbents could effectively remove Cu2+ and Ni2+ from industrial electroplating wastewater and could beused repeatedly for more than five cycles.