Studies on structure and Color of the White Antberaea pernyi, Silkworm Cocoon

Ji Tao,Liu Hongde 한국생약학회 1995 Natural Product Sciences Vol.1 No.1

Traditional Antheraea pernyi silkworm cocoon is tawny color. The white Antheraea pernyi silkworm cocoons studied here by IR and UV are new breeds of recent breeding. We discovered that the main body of the first grade structure of silk protein in the new white is as same as the one in the traditional tawny Antheraea pernyi silkworm cocoon, yet there are small quantities of cross-linked polymer of gentisic acid and silk protein in the white silkworm cocoons. In spite of the least surviving quantity of the polymer, the white silkworm cocoons are most white and its white color is similar to white Bombyx mori silkworm cocoon.

EVALUATION OF GERMPLASM RESOURCES AND ANALYSIS OF GENETIC DIVERSITIES FROM THE RIDGETAIL WHITE PRAWN Exopalaemon carinicauda

Jitao Li,Jian Li,Ping Liu,Peng Ma,Shuwen Jia,Yang Li 한국수산과학회 양식분과 2015 한국수산과학회 양식분과 학술대회 Vol.2015 No.5

A Novel Image Fusion Algorithm Combining with Classification in NCST Domain

Jitao Zhang,Aili Wang,Jiaying Zhao 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.10

Image fusion is an important branch of information fusion, which is widely used in various fields. At present, the image fusion method is mainly aimed at the different frequency information of the images, the images are fused in transform domain. But in practical application, image fusion is used to improve the credibility of the target information and the demand of background information of is not high. Therefore, this paper puts forward an image fusion method combining with image classification. Firstly, the NSCT transform is used to transform the source images, and the K-Means method is used to realize the classification of the target and the background, and the different fusion criteria are used to get the target and the background. The experimental results show that the image fusion based classification method has a better effect on the subjective visual effect and objective evaluation index.

Sequence-stratigraphic comparison of the upper Cambrian Series 3 to Furongian succession between the Shandong region, China and the Taebaek area, Korea: high variability of bounding surfaces in an epeiric platform

Jitao Chen,S.K. Chough,이정현,Zuozhen Han 한국지질과학협의회 2012 Geosciences Journal Vol.16 No.4

This study focuses on the stratigraphic sequences and the bounding surfaces in the upper Cambrian Series 3 to Furongian Gushan and Chaomidian formations in the Shandong region, China. The bounding surfaces are compared with those of the coeval succession in the Taebaek area, Korea. According to the vertical arrangement of the facies associations and the identification of the bounding surfaces, three stratigraphic sequences are recognized, representing dynamic changes in accommodation versus sedimentation. The bounding surfaces can be traced in the Shandong region for about 6,000 km2 in area, but cannot be correlated with those of the Taebaek area (eastern margin of the platform, about 1,000 km apart). Surface 1 is characterized by an abrupt facies change from carbonate to shale, representing a distinct drowning surface. The drowning surface is also diagnosed in the Taebaek area but highly diachronous. Surface 2 is a cryptic subaerial unconformity, reflected by an erosion surface, missing of a trilobite biozone (Prochuangia Zone), and an abrupt increase in carbon isotope value. It is not identified in the Taebaek area where the Prochuangia Zone is present. Surface 3 is a marine flooding surface, indicated by a subtle transition from flat-bedded microbialite to domal microbialite (or grainstone). It may be correlated with that in the Taebaek area, which is, however, represented by an abrupt facies change from sandstone to limestone-shale alternation. The high variability of the sequence-bounding surfaces is indicative of variable regional factors such as topographic relief, carbonate production, siliciclastic input, and hydrodynamic conditions. It suggests that the sequence-bounding surfaces are invalid for a basin-scale correlation, especially in an epeiric carbonate platform

A Review of Advances in Triaxial Tests: Instruments, Test Techniques and Prospects

Jitao Bai,Yu Diao,Chenhang Jia,Chongyang Liu,Menghan Zhang,Chu Wang 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.8

Triaxial test is approved to be the most suitable method for studying the mechanical properties of rocks and soils in lab. Through conventional triaxial tests, parameters like the strength of rocks and soils can be obtained, thus providing guidance for the design and construction of geotechnical engineering. With the development of geotechnical engineering, more and more new problems that can hardly be solved by conventional triaxial tests have arisen, which can be classified into two categories: one is the mechanical properties of special soils (rocks), and the other is the mechanical properties of the soils (rocks) under special conditions like geologic hazards and multi-field coupling. The paper introduced several new types of triaxial instruments and test techniques developed in response to the problems, and prospects have been made for further study of triaxial tests, which may provide reference for the optimization of triaxial tests.

Unknown Input Observer Design for Takagi-Sugeno Systems with Fuzzy Output Equation

Jitao Li,Zhenhua Wang,Yi Shen,Yipeng Liu 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.1

This paper studies unknown input observer design for discrete-time Takagi-Sugeno fuzzy systems. Theproposed unknown input observer has a new structure that can be applied to Takagi-Sugeno fuzzy systems withnonlinear output equation. We derive the design conditions of the proposed unknown input observer based onLyapunov function and convert them into a set of linear matrix inequalities. Numerical simulations of a vehiclelateral dynamics are given to illustrate the effectiveness of the proposed method.

Durability Assessment Based on Design-value Method for Structure Design

Jitao Yao,Hui Gu 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.4

A significant durability assessment for structure design is devoted to guarantee the necessary service life for its safety andsustainability. A flexible probability assessment method here is improved based on the corrosive cracking life criterion theory modelused in China and improved the design-value method mentioned in ISO2394. It first built an assessment expression consisted ofdesign values and service life, considering limit state function and First Order Reliability Methods (FORM). Then, it took intoaccount the uncertainties and variability about the main random variables in this assessment expression: concrete cover thickness,compressive strength and carbonation depth calculation model uncertainty factor, ignored the secondary variables with littlevariability. Last, by introducing and improving design-value method, it can directly calculate the service life with flexibly reliabilityindex chosen for durability design assessment. This calculation results are easy to contrast with the target index to assess. Withouttraditional reliability calculation, it flexibly evaluated durability design with reliability index of safety results.

Discussion of Sensitivity Factors and Dominating Variable for Design Value Method

Jitao Yao,Kaikai Cheng 대한토목학회 2017 KSCE Journal of Civil Engineering Vol.21 No.1

The partial factor method is considered to be one of the most reliable design methods. However, engineers have examined the shortcomings of the partial factor method, primarily its flexibility and generality in searching for the values of partial factors. In order to improve upon the partial factor method, the design value method has been established on the basis of probability. The design value method is more flexible, general, and represents the developing direction of the reliability design method. However, based on experience, a set of sensitivity factors αi values has been developed. The sum of squares may be greater than 1.0 as a result of conservatism. Although some researchers have revised the values of αi by using the enumeration optimization method, the results are not ideal. This paper focuses on the recommended values of sensitivity factors that are applicable to the safety design as well as the serviceability design. It will be shown that these recommended values can improve the accuracy of the reliability index and present specific ranges of relative errors. This makes it possible to establish a practical design value method based on probability. In addition, a method to determine the dominating parameter is illustrated.

Limestone pseudoconglomerates in the Late Cambrian Gushan and Chaomidian Formations (Shandong Province, China): soft-sediment deformation induced by storm-wave loading

CHEN, JITAO,CHOUGH, SUNG KWUN,CHUN, SEUNG SOO,HAN, ZUOZHEN Blackwell Publishing Ltd 2009 Sedimentology Vol.56 No.4

<P>Abstract</P><P>This paper focuses on the formative processes of limestone pseudoconglomerates in the Gushan and Chaomidian Formations (Late Cambrian) of the North China Platform, Shandong Province, China. The Gushan and Chaomidian Formations consist mainly of limestone and shale (marlstone) interlayers, wackestone to packstone, grainstone and microbialite as well as numerous limestone conglomerates. Seventy-three beds of limestone pseudoconglomerate in the Gushan and Chaomidian Formations were analysed based on clast and matrix compositions, internal fabric, sedimentary structures and bed geometry. These pseudoconglomerates are characterized by oligomictic to polymictic limestone clasts of various shapes (i.e. flat to undulatory disc, blade and sheet), marlstone and/or grainstone matrix and various internal fabrics (i.e. intact, thrusted, edgewise and disorganized), as well as transitional boundaries. Limestone pseudoconglomerates formed as a result of soft-sediment deformation of carbonate and argillaceous interlayers at a shallow burial depth. Differential early cementation of carbonate and argillaceous sediments provided the requisite conditions for the formation of pseudoconglomerates. Initial deformation (i.e. burial fragmentation, liquefaction and injection) and subsequent mobilization and disruption of fragmented clasts are two important processes for the formation of pseudoconglomerates. Burial fragmentation resulted from mechanical rupture of cohesive carbonate mud, whereas subsequent mobilization of fragmented clasts was due to the injection of fluid materials (liquefied carbonate sand and water-saturated argillaceous mud) under increased stress. Storm-wave loading was the most probable deformation mechanism, as an external triggering force. Subsequent re-orientation and rounding of clasts were probably prolonged under normal compactional stress. Eventually, disrupted clasts, along with matrix materials, were transformed into pseudoconglomerates by progressive lithification. Soft-sediment deformation is prevalent in alternate layers of limestone and mud(marl)stone and/or grainstone, regardless of their depositional environments.</P>

Depositional processes and environmental changes during initial flooding of an epeiric platform: Liguan Formation (Cambrian Series 2), Shandong Province, China

이현석,Jitao Chen,Zuozhen Han,조성권 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.6

This paper focuses on the depositional processes and environmental changes during initial marine flooding recorded in the lower Cambrian succession of the North China Platform in Shandong Province, China. In order to understand imbalance of accommodation and sediment supply in the initial stage of basin-fill, a detailed analysis of sedimentary facies was made for the lowermost siliciclastic deposits of the Liguan Formation. It reveals ten siliciclastic lithofacies in three large-scale outcrops (Jinhe, Anqianzhuang, and Zhangjiapo sections). These facies are grouped into four facies associations, representing siliciclastic foreshoreshoreface (S1), siliciclastic offshore (S2), distributary mouth bars (S3), and coastal plain (S4). The siliciclastic components occur in a linear belt, emanating from a major drainage system in the northeastern part of the platform. Deposition of siliciclastic sediments was largely controlled by regional topography of the unconformable surface and shoreline configuration as well as strong effect of waves and currents. With ensued rise in sea level and decrease in siliciclastic sediment supply, carbonate sediments prevailed, filling the accommodation created by epeirogenic subsidence and sediment loading.