Research on Comprehensive Evaluation of Landscape Quality in College Campus Based on AHP——A Case Study of Ya'an Campus of Sichuan Agricultural University in China

Through Analytic Hierarchy Process (AHP),landscape in college campus had been studied from three aspects which were humanization,communication atmosphere and visual effect of plant disposition.By taking the first and second campus of Sichuan Agricultural University (Ya'an) for example,their landscape qualities had been analyzed and compared.It had established AHP model of college campus landscape quality,designed questionnaire according to relevant established indexes and relation between indexes,and then launched questionnaire survey.After data statistics and chart analysis,based on survey of actual environment,it had obtained advantages and disadvantages of the first and second campus of Sichuan Agricultural University in terms of landscape quality,and studied landscape quality evaluation,so as to provide reference for college campus landscape design that could create appropriate communication environment and cater to psychological and behavior need of college students.

SWOT Analysis and Development Countermeasures of Taohua Mountain Ecotourism Agricultural Park in Ya’an City

By using SWOT Analysis, the internal strengths and weakness, and the external opportunities and challenges of Taohua Mountain Ecotourism Agricultural Park were discussed. The result showed that Taohua Mountain was unique in scenery, rich in rural tourism resources and broad in market prospect. However, the tourism products were monotonous, lack of characteristics and depth; the ecological environment was weak; the tourism staff was with low quality; some parts of the area were in poor sanitary condition, restrained by season and periodicity. Meanwhile, there existed some opportunities and challenges in this park. The opportunities mainly contained policy opportunity and transference of tourists’ preference. The challenges primarily included challenges from urban tourism spots of Ya’an City and surrounding cities, and threats of sustainable use of tourism resources resulting from blind exploitation of fruit production area. And the corresponding development countermeasures were put forward, that is, to develop diversified tourism programs, to allocate mountainous resources according to local conditions, to train the local tourism staff, to dredge the area with poor sanitation, to diversify business with other industries supporting the development of tourism agriculture.

纱线外观质量检测的新系统YAS（yarn analysis system）

本文介绍了纱线外观质量检测系统YAS的组成及应用。

Construction of Cultural Landscapes along the Ya'an-Luguhu Expressway——Discussion about Techniques of Designing Highway Cultural Landscapes

The concept of cultural landscapes was introduced,and it was proposed that the construction of highway cultural landscapes should follow the principles of "protection first,secure,integrated,suitable for actual conditions,economic,natural and ecological".In this study,relevant theories were taken to analyze the design of cultural landscapes along the Ya'an-Luguhu Expressway in Sichuan Province.Natural conditions,profound cultures and historical resources in the study area were analyzed,and the construction of its cultural landscapes was further discussed from the perspectives of properly dividing landscape spaces,determining the orientation of cultural landscapes,refining regional cultures,choosing carriers of cultural landscapes,improving cultural value of important landscape nodes by using artistic settings,applying more local materials and so on.So that helpful references could be provided for the landscape design of other expressways,and the integration of cultural landscapes and highway landscape system could be realized.

Health Risk Assessment on Rural Drinking Water Safety —A Case Study in Rain City District of Ya’an City of Sichuan Province

Taking Rain City District of Ya’an for example, this paper based on ComGIS (Component Object Model Geographic Information System) platform takes comprehensive and systematic detection on the exposure dose of chemical carcinogens and non-carcinogens from drinking water sources in this region and discusses health risk assessment of single factor and the whole health risk assessment. As, Hg, Cr, Pb, Cd and fluorides in some drinking water sources of Rain City District are analyzed according to Standards For Drinking Wa-ter Quality (GB5749-2006). A health risk assessment model called USEPA is also applied to drinking water health risk assessment and management countermeasure is proposed. The results show that the greatest health risk for individual person per year is caused by Cr(VI). The health risk of carcinogens is much higher than that of non-carcinogens: the greatest risk value due to non-carcinogen pollutants is caused by fluoride (F), achieving 1.05×10-8/a. The ranking of risk values due to non-carcinogen pollutants by drinking water is Pb>fluoride (F)>Hg, within Pb accounting for 44.77%, fluo-ride (F) accounting for 34.30% and Hg accounting for 20.92%. The average individual carcinogenesis annual risk of Cr(VI) is the greatest, achieving 8.91×10-4/a. The ranking of risk value due to chemical carcinogen by rural drinking water of Ya’an is Cr6+>As>Cd, within Cr6+ accounting for 91.12%, As accounting for 5.89% and Cd accounting for 3.00%. Based on this, the strategy and measures of the health risk management are put forward. This study has worked efficiently in practice. Compared with the same kind of methods which have been found, the paper has the outstanding results for the health risk assessment of the rural drinking water safety.

Spatial variation of health risk of groundwater for drinking water supply in Mingshan County,Ya'an City,China

Rural drinking water safety is a growing concern in China. This study investigated the health risk of pollution of groundwater for the drinking water supply in Mingshan County, Ya＇an City, in Sichuan Province, China, using 46 samples from the years 1991 to 2010. Carcinogenic, non-carcinogenic, and total risks were assessed by the model recommended by the United States Environmental Protection Agency （U.S. EPA）. Thematic maps of the risks caused by single and multiple factors were generated from inverse distance weighting interpolation （IDW） and the geostatistical analysis functions of ArcGIS. The results show that the carcinogenic risks caused by chemicals in groundwater for drinking water supply are low, within the acceptable interval for risk management. However, non-carcinogenic risks are high and the number of sampling sites with risk values exceeding the standards amounted to 29. Non-carcinogenic risks of Cr6＋, nitrate, fluoride, and Fe at sites 43, 46, 50, 64, 67, and 74 were the sources that caused high total health risk. This study reveals the risk level of groundwater quality and orders of treatment of pollutants, and provides a scientific basis for groundwater management in this area.

Chemical Composition and Sources of Rainwater Collected at a Semi-Rural Site in Ya’an, Southwestern China

Rain and snow water samples were collected from Sep. 2010 to Jun. 2011 at a semi-rural site in Ya’an, a city located in the rain-belt along the Tibetan Plateau, to characterize the chemical composition and the sources of precipitation. The collected samples were severely acidified with an annual volume-weighted mean (VWM) pH of 4.03 and an annual acid rain frequency of 79%. SO42- and NH4+ were the most abundant ions, followed by Ca2+, H+, NO3-, Cl-, K+, Na+, F- and Mg2+. The acidity of samples was predominantly generated by H2SO4 and HNO3, which were neutralized by NH4+ and Ca2+ as much as 65%. NH3 played a major role in neutralizing the acid rain. The average ambient concentration of NH3 was 174.2 μg/m3 during sampling periods. Different source apportionment methods, including principle component analysis (PCA), enrichment factor (EF), correlation and back-trajectory analysis were used to track the sources of rainwater. The methods suggested that the pollutants in rainwater were from both local and long-distance transport (1:2.2), or they were from anthropogenic actions (86.4%), sea salts (8.1%) and crustal (5.5%) respectively.

Dual-steering mode based on direct yaw moment control for multi-wheel hub motor driven vehicles:Theoretical design and experimental assessment

One of the main challenges for multi-wheel hub motor driven vehicles is the coordination of individual drivetrains to improve mobility and stability in the steering process.This paper proposes a dual-steering mode based on direct yaw moment control for enhancing vehicle steering ability in complex environ ments.The control system is designed as a hierarchical structure,with a yaw moment decision layer and a driving force distribution layer.In the higher-level layer,the objective optimization function is con-structed to obtain the slip steering ratio,which represents the degree of vehicle slip steering in the dual-steering mode.Ayaw moment controller using active disturbance rejection control theory is designed for continuous yaw rate control.When the actual yaw rate of the vehicle deviates from the reference yaw rate obtained by the vehicle reference model and the slip steering ratio,the yaw moment controller isactuated to determine the yaw moment demand for vehicle steering.In the lower-level layer,there is a torque distribution controller based on distribution rules,which meets the requirement of yaw moment demand without affecting the total longitudinal driving force of the vehicle.For verifying the validity and feasibility of the dual-steering mode,simulations were conducted on the hardware-in-loop real-time simulation platfomm.Additionally,corresponding real vehicle tests were carried out on an eight-wheel prototype vehicle.Test results were generally consistent with the simulation results,thereby demon-strating that the proposed dual-steering mode reduces steering radius and enhances the steering per-formance of the vehicle.

ComGIS-Based Early Warning System of Rural Drinking Water Safety in Ya’an City of Sichuan, China

According to characteristic index of spatial-temporal variability of rural drinking water safety in Ya’an City of Sichuan, China, such as water quantity, water quality, convenience degree and guaranteed rate, etc., this study elaborated the basic framework, model’s methodology structure in early warning system of rural drinking water safety on the basis of ComGIS and initially designed information collection, search and re-trieval, evaluation and analysis of factors, dynamic prediction and dynamic early-warning and functions of guidance and management in this system. The design of this system provided scientific basis to grasp the state of rural drinking water safety timely, release early warning information and properly take necessary control measures, etc. The evaluation results showed that the overall trend was getting better. It proved that the rising pressure value and response value were main reasons which caused the rising evaluation value of rural drinking water safety.

How Does the Farmer Cooperatives Operate in Yanbian Area?

After six years of development,the number of farmer cooperatives in Yanbian area was increased from 72 in 2007 to 2600 in 2012.It has become an important part of local modern agricultural operation.Through the survey and research of current status of farmer cooperatives in Yanbian area,we analyze the deficiencies in capital,technology and human resources during the operating to thoroughly understand its operating status.On this basis,we put forth some recommendations for the development of farmer cooperatives in Yanbian area:implementing industrialization operation;developing long-term development strategy;seeking the support of research institutions and colleges;increasing the types of services;enhancing the value-added.

Lithostratigraphy of the Late Cretaceous Khao Ya Puk Formation in Nakhon Thai Region, Thailand: Implication for Depositional Environment

The Khao Ya Puk Formation (>400 m thick) is well exposed in the Nakhon Thai Region, and is subdivided into three members. The Khao Ya Puk Formation overlies conformably on top of the anhydrite layer of the upper rock salt Maha Sarakham Formation. In turn, it is overlain unconformably by the Phu Khat Formation. The Khao Ya Puk Formation is interpreted to have been deposited by freshwater lake area in arid climate inland subkha in the Late Cretaceous. Lithostatigraphically, Khao Ya Puk Formation can be correlated with the Phu Tok Formation that has been deposited in the Khorat-Ubon basin and Udon-Sakon basin of the Khorat Plateau.

Multiple Solutions for an Elliptic Equation with Hardy-Sobolev Critical Exponent, Hardy-Sobolev-Maz’ya Potential and Sign-Changing Weights

In the present paper, an elliptic equation with Hardy-Sobolev critical exponent, Hardy-Sobolev-Maz’ya potential and sign-changing weights, is considered. By using the Nehari manifold and mountain pass theorem, the existence of at least four distinct solutions is obtained.

Ya Du Biologic Product Company

In recent years, brain corroberant products have been very popular on the health products market in China. Such products as Duolingduo, Jinglingyu, Wangbuliao, Wang Zhong Wang, and Haidao are emerging on the market. Jinglingyu developed and produced by the Ya Du Biologic Product Company, has become one of the most popular products, although it appeared late.

A dataset of Ya’an Earthquake based on social media

The Ya’an Earthquake occurred on April 20,2013(Beijing time).Its epicenter was located in Lushan County,Ya’an City,Sichuan Province,and the magnitude of this earthquake was 7.0.As of 14:30,April 24,the earthquake caused a total of 196 people dead,21 missing and 11470 injured.With the development of information and communication technologies,microblog shows great potential in promoting emergency response as it provides an easily accessible platform on which disaster information could be assembled and rapidly disseminated to a large number of audiences.In view of this,we built the dataset of Ya’an Earthquake based on Sina-Weibo microblogs posted within Sichuan Province during 7 days after its occurrence.Sina-Weibo,a platform for information sharing and exchange,entertainment,leisure and life services,was launched in August 2009.It provides a platform where the public can communicate,express their feelings,offer suggestions,and so on–a platform that is essential for earthquake data search,query and publishing.

抑制LncRNA PANDA表达对人心脏瓣膜间质细胞钙化的改善作用及其机制

目的观察抑制长链非编码RNA PANDA(LncRNA PANDA)表达对人心脏瓣膜间质细胞(hVICs)钙化的影响,并探讨其机制是否与核酸转录因子YA(NF-YA)、凋亡相关蛋白Bax、锚定蛋白2(Notch2)、骨形态发生蛋白2(BMP-2)有关。方法将体外培养的hVICs分为三组,正常对照组加入间质细胞培养基+10%胎牛血清,培养7 d;钙化组加入钙化诱导液,培养7 d。PANDA-siRNA组加入钙化诱导液培养3 d后,采用Lipofectamine^(TM)3000转染试剂盒转染PANDA-siRNA,再培养4 d。取各组分组培养7 d的细胞,采用实时荧光定量PCR法检测LncRNA PANDA相对表达量,光学显微镜观察细胞形态,Western blotting法检测NF-YA、Bax、Notch2、BMP-2蛋白相对表达量,ELISA法检测细胞上清液BMP-2水平。结果PANDA-siRNA组、正常对照组、钙化组细胞LncRNA PANDA相对表达量及上清液BMP-2蛋白水平均依次升高,组间两两比较P均<0.05。PANDA-siRNA组细胞结构清晰,呈条索状生长,生长稍缓慢;钙化组细胞成骨样改变,细胞聚集,呈网状结构;正常对照组细胞贴壁生长,生长迅速。与正常对照组比较,钙化组细胞NF-YA、Bax、Notch2、BMP-2蛋白相对表达量均升高,PANDA-siRNA组均降低(P均<0.05)。结论诱导钙化后的hVICs LncRNA PANDA表达升高,抑制LncRNA PANDA表达可减轻其成骨样改变,其机制可能与降低NF-YA、Bax、Notch2、BMP-2表达有关。

猪繁殖与呼吸综合征病毒YA株ORF5基因的克隆与序列分析

以猪繁殖与呼吸综合征病毒 (PRRSV)YA株为材料 ,采用RT -PCR扩增其ORF5基因全长cDNA并进行序列测定和比较分析。结果YA株ORF5基因cDNA编码区长 6 0 3bp ,可编码 2 0 0个氨基酸残基。与欧洲型代表株LV株、美洲型代表株VR - 2 332株在氨基酸水平上的同源性分别为 5 8%和 90 % ,与国内首株分离株 (CH - 1a)的同源性高达 95 % ,推测YA株属于美洲型。根据YA株ORF5基因编码的氨基酸序列 ,与具有代表性的 12株美洲型毒株和 2株欧洲型毒株绘制进化系统树 ,结果也显示YA株与美洲型分离毒株的遗传关系较近 ,而与欧洲型毒株的遗传关系较远。进一步采用序列分析软件对推导的氨基酸进行比较分析 ,发现YA株ORF5编码的E蛋白存在 5个潜在的N -糖基化位点 ,6个抗原位点 ,其糖基化位点的数目及抗原位点的分布与其它美洲型毒株均存在一定程度的差异 ,但

咪唑类化合物YA20对家蚕眠性和变态的影响

本文探讨了咪唑类化合物YA20对家蚕第四龄及熟蚕的生理效应。(1)第四龄48小时的蚕经结扎去头,导致去头蚕产生蛹态,用1000ppm的YA20或50-1000的保幼激素类似物738的丙酮液分别浸渍处理,去头蚕在蜕皮后保留幼虫态,若用100-1000ppm的YA20丙酮液浸渍熟蚕,则熟蚕蜕皮后产生幼虫态,表明YA20具有保幼激素类似物的效应。(2)四龄蚕初期连续添食YA20 48小时,可有效诱导三眠蚕,与正常四龄蚕相比,三眠蚕血淋巴中蜕皮激素的滴度高峰期被明显推迟。但是,用植源性蜕皮激素及YA20同时添食,则可完全抑制三眠蚕的发生,还讨论了YA20在不同条件下产生的抗保幼激素、抗蜕皮激素及保幼激素类似物等三种作用。

黄海YA01孔沉积物稀土元素组成与源区示踪

黄海 YA0 1孔沉积物稀土元素总量 (ΣREE)变化范围较大 ,接近于全球沉积物平均稀土元素含量的下限 ,略高于黄海、东海 ,明显低于渤海、南海表层沉积物的平均含量。Σ REE和 δEu、δCe值的变化受岩性和沉积环境变化的控制。各类沉积物的稀土元素配分模式非常一致 ,表明这些沉积物具有相同的物源区。Ce/L a、Sm/Nd比值的 DF值判别结果表明 ,钻孔沉积物与现代黄河沉积物更为接近。

YA文学创作与出版的国际经验借鉴研究--以二十一世纪出版社“零时差·YA书系”为例

"YA书系"掀起国内青少年文学研讨热,文章从弥补童书板块结构性缺失视角切入,在年龄细分、主题认知、激励机制等方面,分析"YA书系"创作与出版的国际经验,并将这些经验整合到原创出版系统中,从创作、编辑、推广、评论体系建立等多维度探索激活策略。

Burnside引理和P(?)lya定理的应用实例

Burnside引理和Polya定理是组合数学中极其重要的两个定理,本文提出如何用Burnside引理和Polya定理得出一题多解。