Grouting effects evaluation of water-rich faults and its engineering application in Qingdao Jiaozhou Bay Subsea Tunnel, China

Zhang, Jian,Li, Shucai,Li, Liping,Zhang, Qianqing,Xu, Zhenhao,Wu, Jing,He, Peng Techno-Press 2017 Geomechanics & engineering Vol.12 No.1

In order to evaluate the grouting effects of water-rich fault in tunnels systematically, a feasible and scientific method is introduced based on the extension theory. First, eight main influencing factors are chosen as evaluation indexes by analyzing the changes of permeability, mechanical properties and deformation of surrounding rocks. The model of evaluating grouting effects based on the extension theory is established following this. According to four quality grades of grouting effects, normalization of evaluation indexes is carried out, aiming to meet the requirement of extension theory on data format. The index weight is allocated by adopting the entropy method. Finally, the model is applied to the grouting effects evaluation in water-rich fault F4-4 of Qingdao Jiaozhou Bay Subsea Tunnel, China. The evaluation results are in good agreement with the test results on the site, which shows that the evaluation model is feasible in this field, providing a powerful tool for systematically evaluating the grouting effects of water-rich fault in tunnels.

Diagnostic value of Contrast-Enhanced Ultrasound Parametric Imaging in Breast Tumors

Zhang Yuan,Jiang Quan,Zhang Yunxiao,Chen Jian,He Zhu,Gong Liping 한국유방암학회 2013 Journal of breast cancer Vol.16 No.2

Purpose: This study aimed to evaluate the diagnostic value of SonoLiver software for parametric imaging in breast tumors. Methods: Contrast-enhanced ultrasound (CEUS) was performed in 216 breast lesions (113 malignant, 103 benign). The CEUS parameters were compared between benign and malignant lesions. The rise time, the time to peak, the mean transit time and dynamic vessel pattern (DVP) were analyzed using SonoLiver software. Results: Quantitative analysis showed that the rise time was 16.52±4.15 seconds in the benign group vs. 13.86±3.36 seconds in the malignant group (p=0.007), and the time to peak was 19.86±4.87 seconds in the benign group vs. 16.52±4.85 seconds in the malignant group (p=0.009). The mean transit time was 80.55±18.65 seconds in the benign group vs. 65.16±20.28 seconds in the malignant group (p=0.006). The difference between the distribution of DVP in benign and malignant tumors was statistically significant. One hundred one malignant tumors (89.4%) performed an irregular red/yellow fill in the region of interest (ROI) and 85 benign tumors (82.5%) performed a single blue/green fill in the ROI. The sensitivity, specificity, and accuracy of parametric imaging in breast tumors were 84.1%, 85.4%, 84.7%, respectively. Conclusion: The CEUS parametric imaging can distinguish differences between malignant and benign breast tumors as well as provide diagnostic information on breast lesions.

The Models of Power Shifts: An Explanationfor the cycle of Ups-and-Downs in Sino-U.S. Relations

Zhang Liping 인하대학교 국제관계연구소 2004 Pacific Focus Vol.19 No.1

The author tries to build an explanatory model for the cycle of ups‐and‐downs in Sino‐U.S. Relations by analyzing the factors, mechanisms and processes in the decision‐making. She then examines the legitimacy and limitations of this model through appraising the influences of both presidential power shift and Congressional power shift on U.S. China policy in the past 30 years. She concludes that the cycle of Sino‐U.S. relations will still probably parallel with the cycle of American power shift in the future if we hold the international factors and China factors constant.

The Development and Application of a External Coating for Buried Pipeline Rehabilitation

Zhang, Liping,Lin, Zhu,Zhang, Qibin,Qin, Yanlong,Wang, Xueying 한국부식방식학회 2003 Corrosion Science and Technology Vol.2 No.3

With the development of Chinese petroleum and gas industry, about 20,000 km long-distance pipeline and 250,000 km gathering pipeline have been constructed in China. After operating for many years, most of the coatings on buried pipelines have aged so severe that the steel pipes are subject to corrosion environment underground. Focusing on the need of extemal coating for buried pipeline rehabilitation, a new type of coating has been developed. The development and application of the coatings has been introduced in this paper.

Effects of Nitrate Addition on Rumen Fermentation, Bacterial Biodiversity and Abundance

Liping Zhao,Qingxiang Meng,Liping Ren,Wei Liu,Xinzhuang Zhang,Yunlong Huo,Zhenming Zhou 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.10

This study examined changes of rumen fermentation, ruminal bacteria biodiversity and abundance caused by nitrate addition with Ion Torrent sequencing and real-time polymerase chain reaction. Three rumen-fistulated steers were fed diets supplemented with 0%, 1%, and 2% nitrate (dry matter %) in succession. Nitrate supplementation linearly increased total volatile fatty acids and acetate concentration obviously (p = 0.02; p = 0.02; p<0.01), butyrate and isovalerate concentration numerically (p = 0.07). The alpha (p>0.05) and beta biodiversityof ruminal bacteria were not affected by nitrate. Nitrate increased typical efficient cellulolytic bacteria species (Ruminococcus flavefaciens, Ruminococcus ablus, and Fibrobacter succinogenes) (p<0.01; p = 0.06; p = 0.02). Ruminobactr, Sphaerochaeta, CF231, and BF311 genus were increased by 1% nitrate. Campylobacter fetus, Selenomonas ruminantium, and Mannheimia succiniciproducens were core nitrate reducing bacteria in steers and their abundance increased linearly along with nitrate addition level (p<0.01; p = 0.02; p = 0.04). Potential nitrate reducers in the rumen, Campylobacter genus and Cyanobacteria phyla were significantly increased by nitrate (p<0.01; p = 0.01).To the best of our knowledge, this was the first detailed view of changes in ruminal microbiota by nitrate. This finding would provide useful information on nitrate utilization and nitrate reducer exploration in the rumen.

O-Glycosylation regulates polarized secretion by modulating Tango1 stability

Zhang, Liping,Syed, Zulfeqhar Ali,van Dijk Hä,rd, Iris,Lim, Jae-Min,Wells, Lance,Ten Hagen, Kelly G. National Academy of Sciences 2014 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.111 No.20

<P>Polarized secretion is crucial in many tissues. The conserved protein modification, O-glycosylation, plays a role in regulating secretion. However, the mechanisms by which this occurs are unknown. Here, we demonstrate that an O-glycosyltransferase functions as a novel regulator of secretion and secretory vesicle formation in vivo by glycosylating the essential Golgi/endoplasmic reticulum protein, Tango1 (Transport and Golgi organization 1), and conferring protection from furin-mediated proteolysis. Loss of the O-glycosyltransferase PGANT4 resulted in Tango1 cleavage, loss of secretory granules, and disrupted apical secretion. The secretory defects seen upon loss of <I>pgant4</I> could be rescued either by overexpression of <I>Tango1</I> or by knockdown of a specific furin (<I>Dfur2</I>) in vivo. Our studies elucidate a novel regulatory mechanism whereby secretion is influenced by the yin/yang of O-glycosylation and proteolytic cleavage. Moreover, our data have broader implications for the potential treatment of diseases resulting from the loss of O-glycosylation by modulating the activity of specific proteases.</P>

Control and Measurement System for the Tuning of a PEFP Low-Beta Superconducting RF Cavity

Zhang Liping,Sun An,Yingmin Li,Tang Yazhe,Yong Sub Cho 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.5

The superconducting RF (SRF) cavity is being considered to accelerate the proton beam in the proton engineering frontier project (PEFP) linac and for its post-project. In order to correct for the frequency shift and the field flatness variation of a TM010 mode in a raw PEFP multi-cell (SRF) cavity caused by manufacturing errors and welding shrinkage during its production, a field flatness tuning system has been developed. A new control and measurement system has been successfully developed for the relevant tuning system. The system automatically controls the bead's forward movement to a designated position and back to its original point and it also drives the network analyzer to measure and acquire the data on the SRF cavity while the bead is moving through the SRF cavity. After the bead has past through the cavity, the control and measurement system provides the cavity's field flatness and the tuning frequencies of the individual cells. The experiments in this study revealed that the control and measurement system is reliable. By using this control and measurement system, the field flatness of a PEFP low-beta cavity can be tuned from 75.62 % at 697.925 MHz to 1.43 % at 700 MHz, which can satisfy the control requirement.

A Method for k Nearest Neighbor Query of Line Segment in Obstructed Spaces

( Liping Zhang ),( Song Li ),( Yingying Guo ),( Xiaohong Hao ) 한국정보처리학회 2020 Journal of information processing systems Vol.16 No.2

In order to make up the deficiencies of the existing research results which cannot effectively deal with the nearest neighbor query based on the line segments in obstacle space, the k nearest neighbor query method of line segment in obstacle space is proposed and the STA_OLkNN algorithm under the circumstance of static obstacle data set is put forward. The query process is divided into two stages, including the filtering process and refining process. In the filtration process, according to the properties of the line segment Voronoi diagram, the corresponding pruning rules are proposed and the filtering algorithm is presented. In the refining process, according to the relationship of the position between the line segments, the corresponding distance expression method is put forward and the final result is obtained by comparing the distance. Theoretical research and experimental results show that the proposed algorithm can effectively deal with the problem of k nearest neighbor query of the line segment in the obstacle environment.

Extreme Value Prediction of Traffic Loads Using the Average Conditional Exceedance Rate Method

Liping Zhang,Jianqing Bu,Liming Zhou,Wenlong Cao,Cunbao Zhao,Wei Chai 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.12

An efficient prediction of the extreme value of traffic loads is crucial for the structural design, reliability evaluation, maintenance planning, and further life-cycle cost analysis of bridges. In this work, a novel method is proposed for predicting the appropriate extreme traffic load distribution. Specifically, the average conditional exceedance rate (ACER) statistical model is estimated from the historical traffic loads which was collected through a weigh-in-motion system installed in toll stations. The basic idea of the ACER approach lies in the introduction of a cascade of conditioning approximations and the average exceedance rate to capture the dependence effects and obtain the data tail, the trend features of which are fitted with a similar Gumbel distribution function and extrapolated to the concerned level. An illustration case dealing with traffic loads using the ACER strategy is presented, the extreme value and confidence interval (CI) in any return period can be predicted by application of this approach. Furthermore, the peaks-over-threshold (POT) method based on the asymptotic extreme theory is also applied to illustrate the advantages of the ACER method. The ACER method has advantages in analyzing extreme traffic loads, with good robustness and the ability to handle extreme value prediction for different sampling strategies, it also can produce more accurate confidence intervals and predicts consistent extreme values. The study results are expected to help accurately determine traffic loads and ensure safety in bridge engineering.

Research on the Dynamic Complex Spatial Network Relations in Spatial Database

Zhang Liping,Li Song,Liu Lei,Yu Jiaxi,Li Shuang,Fan Ruiguang 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.11

Representation and analysis of the complex spatial network relations are of great significance in fields such as Geographic Information System,spatial database, spatial data mining and intelligent inference. As the existing research achievements cannot be used to deal with the dynamic complex spatial network relations effectively in reality, in order to make up for the deficiency of existing methods, the dynamic complex spatial network relations is studied in detail. The predicate representation methods of the strict and extended complex spatial network relations are proposed respectively. The dynamic logical hierarchical relationship and dynamic migration relationship of the strict spatial network relation are given. Furthermore, this paper lay emphasis on the study of the dynamic conversion and adjacent relevance of the extended complex spatial network, and some instance analyses are provided. The research achievements in this paper is rather suitable for dealing with issues about the representation, error correction and forecast of the dynamic complex spatial network relations, therefore, the ability of spatial database to deal with spatial relations of complex spatial object has been enhanced.