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Search Results: 1 - 10 of 11874 matches for " Yanshu Yin "
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A New Method to Select Training Images in Multi-Point Geostatistics  [PDF]
Lixin Wang, Yanshu Yin, Wenjie Feng
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.32010
Abstract: Training images, as an important modeling parameter in the multi-point geostatistics, directly determine the effect of modeling. It’s necessary to evaluate and select the candidate training image before using the multi-point geostatistical modeling. The overall repetition probability is not sufficient to describe the relationship of single data events in the training image. Based on the understanding, a new method was presented in this paper to select the training image. As is shown in the basic idea, the repetition probability distribution of a single data event was used to characterize the type and stationarity of the sedimentary pattern in the training image. The repetition probability mean value and deviation of single data event reflected the stationarity of the geological model of the training image; the rate of data event mismatching reflected the diversity of geological patterns in training images. The selection of optimal training image was achieved by combining the probability of repeated events and the probability of overall repetition of single data events. It’s illustrated in the simulation tests that a good training image has the advantages of high repetition probability compatibility, stable distribution of repeated probability of single data event, low probability mean value, low probability deviation and low rate of mismatching. The method can quickly select the training image and provide the basic guarantee for multi-point geostatistical simulations.
Analysis of Influence Factors of Tide-Dominated Estuaries Based on Deposition Numerical Simulation  [PDF]
Tao Tang, Jixin Huang, Yanshu Yin, Wenjie Feng
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.32012
Abstract: Tide-dominated estuaries sedimentary reservoir is a hot area of sedimentology research in recent years, and the important target of oil and gas exploration is one of the relatively few sedimentary systems. Based on the study of underground reservoirs, outcrop and modern sedimentation, scholars believe that the estuary is a sedimentary system formed by transgressive system tract, which is composed of a complex subfacies environment with obvious changes. Its formation is influenced by many factors. The purpose of this paper is to simulate the deposition process of estuaries by Delft-3D software, and to reveal the main controlling factors of estuarine reservoir formation. The factors are as follows. 1) The size of the river flow has a destructive effect on the formation of the estuarine sand bar in the estuary, but the effect is small. 2) Tidal energy plays a constructive role in estuarine sand bars in estuaries, and it is also the main force for the formation of estuarine reservoirs. 3) The composition of the sediments has an obvious influence on the formation of the estuarine reservoir, and the content of the mud is an important factor for the retention of the estuarine sand bar.
Trophic ecology and microhabitat utilization by the Bufo gargarizans, Rana guentheri, and Rana limnocharis in southwestern China
Yu, Tonglei;Guo, Yanshu;
Zoologia (Curitiba) , 2012, DOI: 10.1590/S1984-46702012000100006
Abstract: we studied the trophic ecology and microhabitat use of the asiatic toad, bufo gargarizans cantor, 1842; guentheri frog, rana guentheri (boulenger, 1882); and the ricefield frog, rana limnocharis (boie, 1834). these three species are common around nanchong city, in southwestern china, where they live in the same habitat before hibernation. the main objective of this study was to analyze the diets and patterns of coexistence relative to the microhabitat of each species. in the asiatic toad, based on index of relative importance, the diet was dominated by adult coleoptera, isopoda, and hymenoptera (29.53%, 22.07%, and 15.20%, respectively), while the guenther's frog and ricefield frog ingested predominantly orthoptera (67.44% and 40.94%, respectively). the standardized feeding niche breadth of the asiatic toad (0.277) was wider than that of the guentheri frog (0.177) and ricefield frog (0.269). the overlap in the trophic niche (prey proportion) between the toad and two species of frog was low (toad vs. guentheri frog, ch = 0.526; toad vs. ricefield frog, ch = 0.521), while this was high for the two species of frogs (ch = 0.942). the three species also differed in microhabitat use. asiatic toads showed strong preference for small roads close to shrubs or pre-harvest corn, while guenther's frogs preferred bare surfaces on habitat edges, and ricefield frogs showed a preference for bare surfaces as feeding sites in the middle of habitat. the difference in diet observed during three species seems to be explained by the difference in microhabitat use and body size of three species.
Involvement of insulin-degrading enzyme in the clearance of beta-amyloid at the blood-CSF barrier: Consequences of lead exposure
Mamta Behl, Yanshu Zhang, Wei Zheng
Fluids and Barriers of the CNS , 2009, DOI: 10.1186/1743-8454-6-11
Abstract: Rats were injected with a single dose of Pb acetate or an equivalent concentration of Na-acetate; CP tissues were processed to detect the location of IDE by immunohistochemistry. For in vitro studies, choroidal epithelial Z310 cells were treated with Pb for 24 h in the presence or absence of a known IDE inhibitor, N-ethylmaleimide (NEM) to assess IDE enzymatic activity and subsequent metabolic clearance of Aβ. Additionally, the expression of IDE mRNA and protein were determined using real time PCR and western blots respectively.Immunohistochemistry and confocal imaging revealed the presence of IDE towards the apical surface of the CP tissue with no visible alteration in either its intensity or location following Pb exposure. There was no significant difference in the expressions of either IDE mRNA or protein following Pb exposure compared to controls either in CP tissues or in Z310 cells. However, our findings revealed a significant decrease in the IDE activity following Pb exposure; this inhibition was similar to that seen in the cells treated with NEM alone. Interestingly, treatment with Pb or NEM alone significantly increased the levels of intracellular Aβ, and a greater accumulation of Aβ was seen when the cells were exposed to a combination of both.These data suggest that Pb exposure inhibits IDE activity but does not affect its expression in the CP. This, in turn, leads to a disrupted metabolism of Aβ resulting in its accumulation at the blood-CSF barrier.Studies in literature have shown that more than 90% of Alzheimer's disease (AD) cases are sporadic in nature [1], suggesting the involvement of environmental triggers in addition to genetic mutations. Amongst occupational and environmental factors, exposure to toxic metal lead (Pb) has been associated with severe memory deficits and AD-like pathology as indicated by studies on Pb-exposed workers [2,3]. The deleterious effects of Pb were documented as early as in 1975, when a patient who survived severe Pb enc
Different Effects of Malate on the Activities of Photosystem II in Detached Leaves of Maize and Tobacco  [PDF]
Zhenhai Cui, Ao Zhang, Ziling Hu, Lijun Zhang, Jinjuan Fan, Yanshu Zhu, Kai Hu, Yanye Ruan, Yixin Guan
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.611173
Abstract: Malate is the first stable product after CO2 is fixed in NADP-dependent malic enzyme (NADP-ME) type of C4 plants, which transfers CO2 and the reducing equivalent from mesophyll cell (MC) to vascular bundle sheath cell (BSC) chloroplasts and affects the redox state of BSC. The aim of this experiment is to investigate the effect of exogenous malate on the activity of photosystem II (PS II) in C4 and C3 plants. The leaf discs from the 5th fully expanded leaves of maize (NADP-ME type C4 plants) and the 10th fully expanded leaves of tobacco (C3 plants) were treated with malate of 50, 100 μM and the chlorophyll fluorescence parameters were measured. Malate treatments decreased the photochemical reaction efficiency (FV/FM) in maize leaves, as a result of rising in initial fluorescence (FO) and decreasing in maximal fluorescence (FM). The number of active PS II reaction center (RC) per excited cross section (RC/CS) declined in malate-treated maize, suggesting that malate inactivated PS II RC. Malate treatments also increased Wk, representing the severity of oxygen-evolving complex (OEC) damage, and decreased the rate of photosynthetic oxygen evolution. We conclude that exogenous malate regulates the activity and structure of PS II in C4 plant maize. No significant changes in the activity of PS II were observed in malate-treated C3 plant tobacco. It is suggested that the short term malate treatment will inhibit PS II of leaves which have C4 anatomy and C4 enzymes.
A preliminary study on the treatment of bruxism by biofeedback therapy  [PDF]
Xuemeng Yin, Xinmin Yin
Open Journal of Stomatology (OJST) , 2014, DOI: 10.4236/ojst.2014.41001
Abstract:

Objective: To evaluate the effect of wireless biofeedback therapy on bruxism. Methods: Fifteen bruxiers participated to be treated by this therapy. The abnormal movements of teeth during sleep were monitored by a maxillary splint with an electric resistance strain gauge. Meanwhile, the receiver device recorded these details and analyzed the data, including the value of the biting force, occurring time and duration. If the value of biting force or duration exceeds the threshold, a vibrating device like a watch style will alert the patient to relax the masticatory muscles and nervous system to stop the abnormal grinding or clenching. Data were recorded during 8 hours’ sleep and analyzed after the 12 weeks’ treatment and 24 weeks’ treatment. Results: The average episodes of bruxism have declined from (10.60 ± 1.23) to (6.60 ± 0.75) after 12 weeks’ treatment (p < 0.05), and the average duration of bruxism events was reduced from (13.2 ± 0.74) s to (6.50 ± 0.40) s (p < 0.05). The average episodes of bruxism have declined to (3.80 ± 0.64) after 24 weeks’ treatment, and the average duration of bruxism events was reduced to (3.37 ± 0.34) s (p < 0.05). Conclusions: The results suggest that biofeedback therapy can be effective for bruxism treatment.

Photoinhibition of Leaves with Different Photosynthetic Carbon Assimilation Characteristics in Maize (Zea mays)  [PDF]
Yanye Ruan, Xiaoyang Li, Yanpeng Wang, Siqi Jiang, Bo Song, Zhiyou Guo, Ao Zhang, Qi Qi, Lijun Zhang, Jinjuan Fan, Yixin Guan, Zhenhai Cui, Yanshu Zhu
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.83023
Abstract: Strong light decreases the rate of photosynthesis and assimilates production of crop plants. Plants with different carbon reduction cycles respond differently to strong light stress. However, variation in photoinhibition in leaves with different photosynthetic characteristics in maize is not clear. In this experiment, we used the first leaves (with an incomplete C4 cycle) and fifth leaves (with a complete C4 cycle) of maize plants as well as the fifth leaves (C3 cycle) of tobacco plants as a reference to measure the photosynthetic rate (PN) and chlorophyll a parameters under strong light stress. During treatment, PN, the maximal fluorescence (Fm), the maximal quantum yield of PSII photochemistry (Fv/Fm), and the number of active photosystem II (PSII) reaction centers per excited cross-section (RC/CSm) declined dramatically in all three types of leaves but to different degrees. PN, Fm, Fv/Fm, and RC/CSm were less inhibited by strong light in C4 leaves. The results showed that maize C4 leaves with higher
The Research of Effects of Evaporation Evolution on Climatological Drought Trend in Tianjin Region
天津地区蒸发演变及对本地气候干旱化影响的研究

Rong Yanshu,Tu Qipu,
荣艳淑
,屠其璞

气候与环境研究 , 2004,
Abstract: 使用天津地区 41年的气象资料 ,分析了潜在蒸发量季节与年际演变的基本特征 ,潜在蒸发量的热力和动力两部分在不同季节彼此消涨的规律 ,以及不同气象要素对潜在蒸发的影响。提出了累积干燥度 (accumulateddryness)的概念 ,定量地讨论了蒸发和气候变暖对干旱的影响。研究表明 ,对蒸发影响最大的是热力作用 ,其对潜在蒸发的贡献年平均可达 70 % ;动力作用则在冬季最突出。气象要素中对蒸发影响最大的是气温 ,当年均气温增加 1℃时 ,年蒸发总量可增加 30 33mm ;风速的影响次之 ;水汽压和日照的影响较小。潜在蒸发量以逐年增大的趋势发展 ,尤其是近 1 0年 ,增长速率达 4 2 2mma- 1 ,使得累积干燥度逐年增大。在气候变暖的背景下 ,增温使潜在蒸发量增大 ,在很大程度上导致了年际间的持续干旱 ,使气候呈干旱化趋势发展。
Identification of Astrotactin2 as a Genetic Modifier That Regulates the Global Orientation of Mammalian Hair Follicles
Hao Chang?,Hugh Cahill?,Philip M. Smallwood?,Yanshu Wang?,Jeremy Nathans
PLOS Genetics , 2015, DOI: 10.1371/journal.pgen.1005532
Abstract: Planar cell polarity (PCP) signaling controls the global orientation of surface structures, such as hairs and bristles, in both vertebrates and invertebrates. In Frizzled6-/- (Fz6-/-) mice, hair follicle orientations on the head and back are nearly random at birth, but reorient during early postnatal development to eventually generate a nearly parallel anterior-to-posterior array. We report the identification of a naturally occurring exon 5 deletion in Astrotactin2 (Astn2) that acts as a recessive genetic modifier of the Fz6-/- hair patterning phenotype. A genetically engineered Astn2 exon 5 deletion recapitulates the modifier phenotype. In Fz6-/-;Astn2ex5del/del mice, hair orientation on the back is subtly biased from posterior-to-anterior, leading to a 180-degree orientation reversal in mature mice. These experiments suggest that Astn2, an endosomal membrane protein, modulates PCP signaling.
Computing a Compact Spline Representation of the Medial Axis Transform of a 2D Shape
Yanshu Zhu,Feng Sun,Yi-King Choi,Bert Jüttler,Wenping Wang
Computer Science , 2013, DOI: 10.1016/j.gmod.2014.03.007
Abstract: We present a full pipeline for computing the medial axis transform of an arbitrary 2D shape. The instability of the medial axis transform is overcome by a pruning algorithm guided by a user-defined Hausdorff distance threshold. The stable medial axis transform is then approximated by spline curves in 3D to produce a smooth and compact representation. These spline curves are computed by minimizing the approximation error between the input shape and the shape represented by the medial axis transform. Our results on various 2D shapes suggest that our method is practical and effective, and yields faithful and compact representations of medial axis transforms of 2D shapes.
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