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| 1 | Additive manufacturing of metals:Microstructure evolution and multistage control显示文摘As a revolutionary industrial technology,additive manufacturing creates objects by adding materials layer by layer and hence can fabricate customized components with an unprecedented degree of freedom.For metallic materials,unique hierarchical microstructures are constructed during additive manufacturing,which endow them with numerous excellent properties.To take full advantage of additive manufacturing,an in-depth understanding of the microstructure evolution mechanism is required.To this end,this review explores the fundamental procedures of additive manufacturing,that is,the formation and binding of melt pools.A comprehensive processing map is proposed that integrates melt pool energy-and geometry-related process parameters together.Based on it,additively manufactured microstructures are developed during and after the solidification of constituent melt pool.The solidification structures are composed of primary columnar grains and fine secondary phases that form along the grain boundaries.The post-solidification structures include submicron scale dislocation cells stemming from internal residual stress and nanoscale precipitates induced by intrinsic heat treatment during cyclic heating of adjacent melt pool.Based on solidification and dislocation theories,the formation mechanisms of the multistage microstructures are thoroughly analyzed,and accordingly,multistage control methods are proposed.In addition,the underlying atomic scale structural features are briefly discussed.Furthermore,microstructure design for additive manufacturing through adjustment of process parameters and alloy composition is addressed to fulfill the great potential of the technique.This review not only builds a solid microstructural framework for metallic materials produced by additive manufacturing but also provides a promising guideline to adjust their mechanical properties. | Zhiyuan Liu Dandan Zhao Pei Wang Ming Yan Can Yang Zhangwei Chen Jian Lu Zhaoping Lu | 2022 | Journal of Materials Science & Technology2022，，5： | 27 |
| 2 | Spatio-temporal changes of NDVI and its relation with climatic variables in the source regions of the Yangtze and Yellow rivers显示文摘Yangtze 和黄河的来源区域是中国的重要的水保存区域。在最近的年里,全球气候变化和无理的资源开发引起的来源区域的生态的恶化趋势逐渐地增加了。在这份报纸,空间分发和在 Yangtze 和黄河的来源区域的植被盖子的动态变化被分析在最近 10 年基于 1-km 分辨率从 1998 ~ 2007 的多时间的 SPOTVGT-DN 数据。同时,在空气温度,降水,浅地面温度和 NDVI 之间的关联关系,哪个是 3?? | YANG Zhaoping GAO Jixi ZHOU Caiping SHI Peili ZHAO Lin SHEN Wenshou OUYANG Hua | 2011 | Journal of Geographical Sciences2011，21，6： | 24 |
| 3 | Evaluation on Tourism Ecological Security in Nature Heritage Sites——Case of Kanas Nature Reserve of Xinjiang,China显示文摘The nature heritages are the precious legacy of nature with outstanding scientific and aesthetic value. They are quite different from other common ecotourism areas, because of its original and unique system, sensitive and vulnerable landscape, and peripheral cultural features. Therefore, the tourism development in the nature heritage sites should be on the premise of ecological security. The evaluation index system of tourism ecological security in nature heritage sites was constructed in this article by AHP and Delphi methods, including nature ecological security, landscape visual security and local culture ecological security, and the security thresholds of indices were also established. In the indices' weights of the evaluation model, the nature ecological security ranked the highest, followed by tourist landscape visual security and culture ecological security, which reflected the influence degree of the limited factor to tourism ecological security. Then, this paper carried out an empirical study of Kanas of Xinjiang Uygur Autonomous Region, China, which has the potential to be the World Nature Heritage. On the basis of the data attained from survey and observation on the spot, as well as questionnaire answered by tourists and local communities, the ecological security status in Kanas was evaluated. The result showed that the status of Kanas tourism ecological security was better, but there had some limiting factors. Lastly, effective measures were put forward to ensure its ecological security. | LIU Xuling YANG Zhaoping DI Feng CHEN Xuegang | 2009 | Chinese Geographical Science2009，19，3： | 12 |
| 4 | Estimation on Aesthetic Value of Tourist Landscapes in a Natural Heritage Site:Kanas National Nature Reserve,Xinjiang,China显示文摘Most world natural heritage sites are designated partly by reason of their prominent aesthetic values in accordance with Article Ⅶ of World Natural Heritage Convention.In this paper, the aesthetic values of Kanas National Nature Reserve, which has potential for such designation, was analyzed quantitatively using scenic beauty estimation(SBE).The landscapes of 19 representative scenic spots in the Kanas National Nature Reserve in summer and autumn were selected as the objects of evaluation.The contributions of different landscape factors to the aesthetic value of the Kanas National Nature Reserve were revealed using a multivariate quantitative model.The main factors affecting the aesthetic value were waterscapes, vegetation, mountains, folk culture and the tourist environment.The t-test and F-test results are extremely significant.According to the results, some suggestions were given for conserving the landscapes in the Kanas National Nature Reserve. | DI Feng YANG Zhaoping LIU Xuling WU Jingrui MA Zhongguo | 2010 | Chinese Geographical Science2010，20，1： | 11 |
| 5 | Development and Conservation of Glacier Tourist Resources——A Case Study of Bogda Glacier Park显示文摘Glacier is one kind of the most beautiful geological sightseeing in the world as well as a special kind of tourism resources.The characters of glacier tourism include scarcity,frangibility,localization of tourist activity,scien-tific connotation,and integrated function and value.The paper summarizes the latest researches in developing glacier tourism resources.Regarding the Bogda Glacier Park as an example,the authors analyze the characteristics of glacier tourism resources in detail and the conditions and potential threats of glacier tourism development.Suggestions on glacier tourism development and protection are given as follows:1) to plan function subarea scientifically and rea-sonably;2) to combine tourism,scientific research with ecological education;3) to take countermeasures of environ-mental protection;4) to integrate tourism resources and strengthening regional cooperation.Finally,emphases are put forward on resources conformity along the tourism line and cooperation of tourism management.The paper aims to seek after the coordination path in exploitation and protection of glacier tourism resources to guide the exploitation of other glacier tourism destinations. | LIU Xuling YANG Zhaoping XIE Ting | 2006 | Chinese Geographical Science2006，16，4： | 8 |
| 6 | Effect of MoO_3 on vanadium based catalysts for the selective catalytic reduction of NO_x with NH_3 at low temperature显示文摘The selective catalytic reduction(SCR) activities of the MoO_3 doped V/WTi catalysts prepared by the incipient wetness impregnation method at low temperature were investigated.The results showed that the addition of MoO_3 could enhance the NO_ xconversion at low temperature and the best SCR activity was obtained when the dosage of MoO_3 reached5 wt.%. The NH3-TPD and DRIFTS experiments indicated that the addition of MoO_3 changed the type and number of acid sites on the surface of catalysts and reaction activities of acid sites were altered at the same time. The redox capacity and amount of active oxygen species got improved for V3Mo5/WTi catalyst, which could be confirmed by the H_2-TPR and transient response experiments. Water vapor inhibited the NO_xconversion at low temperature. Deposition of ammonium sulfate or bisulfate might be main reason for the loss of catalytic activity in the presence of SO_2 at low temperature. Choosing the suitable NH_3/NO ratio and elevation of reaction temperature both could weaken the influence of SO_2 on the SCR activity of the V3Mo5/WTi catalyst. Thermal treatment of the deactivated catalyst at350°C could get the low temperature activity recovered. The decrease of GHSV improved the de NO_x efficiency at low temperature and we speculated that the rational technological process and operation parameters could contribute to the application of this kind of catalysts in real industrial environment. | Lin Zhu Zhaoping Zhong Han Yang Chunhua Wang | 2017 | Journal of Environmental Sciences2017，29，6： | 8 |
| 7 | Spatiotemporal characteristics of cultural sites and their driving forces in the Ili River Valley during historical periods显示文摘这研究使用 ArcGIS 在西北的中国在 Ili 河山谷分析文化地点的空间与时间的分发。它探索在这些地点之间的关系空间与时间的进化特征,人的历史,和自然环境。结果显示这些地点的数字和比例,和他们的出现的频率,在六个历史的时期期间展出了一个转换塑造 V 的变化趋势。在东方高、在转移到的开始的三个时期的向西空间的分发模式低在西方高、在东方低在后者期间三个时期,在人的活动的空间重心表明一个变化。这些地点主要在等级的斜坡上被散布 15,与他们在春天和秋天时期(770 BC476 BC ) 期间从 75% 增加的比例 Qin 王朝(221 BC207 BC ) 到 93.75% 在 Qing DynastyModern 时期期间。地点举起的集中的分发变了从在春天和秋天 PeriodQin 王朝,和西方的汉(206 BC8 ) 期间分级 48 南部、北的王朝(420589 ) ,到在后者期间分级 14 三个时期。地点的数字从高举起的山和山,并且从高斜坡显示出一个变的趋势到低举起的平原到低斜坡。特别地,这些地点从中间、在上游的区域展出了移植的一个特殊潮湿的进化模式到下游的区域,与位于典型干旱区域的地点的迁居模式对比。学习也认为显著地,影响分发和文化地点的空间与时间的进化的因素是人的因素和自然因素。 | WANG Fang YANG Zhaoping LUAN Fuming XIONG Heigang SHI Hui WANG Zhaoguo ZHAO XingYou QIN Wenmin WU Wenjie LI Dong | 2015 | Journal of Geographical Sciences2015，25，9： | 5 |
| 8 | Natural Heritage Value of Xinjiang Tianshan and Global Comparative Analysis显示文摘Xinjiang Tianshan is a serial natural property that has been nominated for World Heritage status.This paper presents a systematically comprehensive and comparative analysis of the heritage resources of Xinjiang Tianshan according to the World Heritage criteria.Its biological,ecological and aesthetic values,which are of global importance, are documented.It is concluded that Xinjiang Tianshan meets the world heritage criteria(vii)and (ix).Xinjiang Tianshan is compared with other mountain world heritage sites,mountains in Central Asia,the Tianshan Mountains outside China,and with the protected areas of the Tianshan Mountains on the Tentative List for World Heritage Sites,so as to provide objective data for the world heritage application. | XU Xiaoliang YANG Zhaoping Adayi Saiken Shao Rui LIU Xinyu | 2012 | Journal of Mountain Science2012，9，2： | 5 |
| 9 | Effects of freezing intensity on soil solution nitrogen and microbial biomass nitrogen in an alpine grassland ecosystem on the Tibetan Plateau,China显示文摘The change of freeze-thaw pattern of the Tibetan Plateau under climate warming is bound to have a profound impact on the soil process of alpine grassland ecosystem;however,the research on the impact of the freeze-thaw action on nitrogen processes of the alpine grassland ecosystem on the Tibetan Plateau has not yet attracted much attention.In this study,the impact of the freezing strength on the soil nitrogen components of alpine grassland on the Tibetan Plateau was studied through laboratory freeze-thaw simulation experiments.The 0–10 cm topsoil was collected from the alpine marsh meadow and alpine meadow in the permafrost region of Beilu River.In the experiment,the soil samples were cultivated at –10°C,–7°C,–5°C,–3°C and –1°C,respectively for three days and then thawed at 2°C for one day.The results showed that after the freeze-thaw process,the soil microbial biomass nitrogen significantly decreased while the dissolved organic nitrogen and inorganic nitrogen significantly increased.When the freezing temperature was below –7°C,there was no significant difference between the content of nitrogen components,which implied a change of each nitrogen component might have a response threshold toward the freezing temperature.As the freeze-thaw process can lead to the risk of nitrogen loss in the alpine grassland ecosystem,more attention should be paid to the response of the soil nitrogen cycle of alpine grasslands on the Tibetan Plateau to the freeze-thaw process. | YANG Zhaoping GAO Jixi YANG Meng SUN Zhizhong | 2016 | Journal of Arid Land2016，8，5： | 5 |
| 10 | Impact Assessment and Protection of Outstanding Landscape Integrity in a Natural Heritage Site:Fairy Valley,Kanas Nature Reserve,Xinjiang,China显示文摘The essential purpose of the Convention Concerning the Protection of World Cultural and Natural Heritage is to protect the integrity of heritage values.Outstanding landscape is the core embodiment of the aesthetic value of a natural heritage site.This paper proposes a new assessment method from the point of view of the protection of heritage values.It is used to measure the degree of outstanding landscape integrity under the human and natural impact in natural heritage sites.This paper employ three indices,a visual index of outstanding landscape,a harmony index of the artificial landscape and a disturbance index of damaged landscape,to measure the impact of landscape integrity.The impact assessment model is based on a weighted combination of the three indices.The study site is the Fairy Valley,Kanas Nature Reserve,Xinjiang Uygur Autonomous Region in northwest China.The information employed is derived from field investigation and a Digital Elevation Model(DEM).A comprehensive evaluation of the Fairy valley was undertaken and it was determined that the outstanding landscape values are being compromised.Three protection methods are proposed to reduce the adverse effects and maintain landscape quality,thereby providing site managers with suggestions for the protection of natural heritage values.More broadly,the paper contributes novel methods of landscape assessment applicable to natural protected areas. | HANFang YANG Zhaoping LIU Xinyu DI Feng | 2011 | Journal of Mountain Science2011，8，1： | 4 |
| 11 | Alteration of microbial properties and community structure in soils exposed to napropamide显示文摘The effect of pesticide napropamide (N,N-diethyl-2-(1-naphthalenyloxy) propanamide) on soil microorganisms for long-term (56 d) was assessed by monitoring changes in soil microbial biological responses. Soils were treated with napropamide at 0, 2, 10, 20, 40, and 80 mg/kg soil and sampled at intervals of 1, 3, 7, 14, 28, 42, and 56 d. The average microbial biomass C declined in napropamide-treated soils as compared to control. The same trend was observed on microbial biomass N after napropamide application. We also determined the basal soil respiration (BSR) and observed a high level in soils treated with napropamide during the first 7 d of experiment. But with the passage of incubation time, BSR with napropamide decreased relatively to control. Application of napropamide at 2-80 mg/kg soil had inhibitory effects on the activity of urease and invertase. Activity of catalase was enhanced during the initial 7 d of napropamide application, but soon recovered to the basal level. The depressed enzyme activities might be due to the toxicity of napropamide to the soil microbial populations. To further understand the effect of napropamide on microbial communities, a PCR- DGGE-based experiment and cluster analysis of 16S rDNA community profiles were performed. Our analysis revealed an apparent difference in bacterial-community composition between the napropamide treatments and control. Addition of napropamide apparently increased the number of bands during the 7-14 d of incubation. These results imply that napropamide-induced toxicity was responsible for the disturbance of the microbial populations in soil. | GUO Hua CHEN Guofeng LV Zhaoping ZHAO Hua YANG Hong | 2009 | Journal of Environmental Sciences2009，21，4： | 4 |
| 12 | Influence of tourist disturbance on soil properties, plant communities, and surface water quality in the Tianchi scenic area of Xinjiang, China显示文摘The impact of tourist disturbance on the environment has become a focal issue of environmental science, ecology, and travel management studies. To assess the influence of tourist disturbance on soils and plants in the Tianchi scenic area of Xinjiang, China, we compared soil properties and plant community characteristics at 0, 5, 10, and 20 m from the tourist trail within areas at three different altitudes, where the intensities of tourist disturbance are distinct. Surface water quality was also studied at three different levels relative to the Tianchi Lake. The results showed that tourist disturbance significantly increased soil p H within 10 m from the trail and soil bulk density on the edge of the trail, but significantly reduced soil organic matter and total nitrogen contents within 5 m from the trail. The number of tree seedlings on the edge of the trail and the shrub coverage and height of herbaceous plants within 5 m from the trail significantly decreased due to tourist disturbance. Changes in herbaceous plant diversity differed by soil zones. In the high altitude region, tourist disturbance led to a remarkable increase in the herbaceous plant diversity on the edge of the trail, while in the low altitude region, tourist disturbance had a low impact on the diversity of herbaceous plants. In addition, tourist activities polluted the surface water, significantly reducing water quality. Thus, current tourist activities have a significant negative impact on the ecological environment in the Tianchi scenic area. | WEN Bin ZHANG Xiaolei YANG Zhaoping XIONG Heigang QIU Yang | 2016 | Journal of Arid Land2016，8，2： | 2 |
| 13 | Characteristics of mineral element content of alpine vegetation in permafrost region on Qinghai-Tibetan Plateau显示文摘The content characteristics of 16 elements(Al,Ca,Cr,Cu,Fe,K,Li,Mg,Mn,Mo,Na,Ni,P,Pb,Sr,and Zn) in 23 plant species collected from the Qinghai-Tibetan Plateau permafrost region were investigated using ICP-OES.Results show that the average contents of Ca,K,Mg,Fe and P were higher than 1,000 mg/kg,those of Al,Na,Zn and Cr ranged between 10-1,000 mg/kg and those of Cu,Li,Pb and Mo were less than 10 mg/kg.The levels of Al,Ca,K,Mg and Na were within the scope of the reported terrestrial plant element content,those of Sr,Fe and Cr were higher than the average of the terrestrial plants and the maximum content of Mn was higher than the upper limit of the reported Mn content.The main character of the element content was of the Ca>K type,however,in terms of Cyperaceae species the element content character was K>Ca type.The contents of Ca,Li,Mg and Sr in Gramineae and Cyperaceae species were higher than those in other species and the contents of Ca,K,Mg,Fe,P,Al and Na in all collected plants were higher than those of other elements.Zn had weak variability with the lowest coefficient(i.e.,7.81%),while other elements had strong variability.The ratio of maximum content to minimum content indicated Ca and K had less change than other elements in the Qinghai-Tibetan Plateau permafrost region.Element content of alpine vegetation in the Qinghai-Tibetan Plateau permafrost region mainly shows a positive correlation,among which the correlation coefficient between Al and Pb,Al and Fe,Mo and Cr,Pb and Fe,Sr and Li were higher than 0.9,and negative correlation had no statistical significance.The correlation between Al and Fe,Mg,Mn in the Qinghai-Tibetan Plateau permafrost region were consistent with that reported in Kunlun Mountains. | ZhaoPing Yang JiXi Gao Hua OuYang Hui Tan | 2012 | Research in Cold and Arid Regions2012，4，1： | 2 |
| 14 | Empirical Analysis of Xinjiang's Bilateral Trade: Gravity Model Approach显示文摘Based on the basic trade gravity model and Xinjiang's practical situation, new explanatory variables (GDP, GDPpc and SCO) are introduced to build an extended trade gravity model fitting for Xinjiang's bilateral trade. From the empirical analysis of this model, it is proposed that those three variables affect the Xinjiang's bilateral trade posi- tively. Whereas, geographic distance is found to be a significant factor influencing Xinjiang’s bilateral trade negatively. Then, by the extended trade gravity model, this article analyzes the present trade situation between Xinjiang and its main trade partners quantitatively in 2004. The results indicate that Xinjiang cooperates with its most trade partners successfully in terms of present economic scale and developing level. Xinjiang has established successfully trade part- nership with Central Asia, Central Europe and Eastern Europe, Western Europe, East Asia and South Asia. However, the foreign trade development with West Asia is much slower. Finally, some suggestions on developing Xinjiang's for- eign trade are put forward. | CHEN Xuegang YANG Zhaoping LIU Xuling | 2008 | Chinese Geographical Science2008，18，1： | 2 |
| 15 | Solid-state foaming of isotactic polypropylene and its composites with spherical or fibrous poty (butylenes terephthalate) 显示文摘 | Luo Yiwei Xin Chunling Yang Zhaoping | 2015 | Jour- nal of Applied Polymer Science2015，132，15： | 1 |
| 16 | The changes of GA level and signaling are involved in the regulation of mesocotyl elongation during blue light mediated de-etiolation in Sorghum bicolor显示文摘 | Sujuan Gao Xiuzhi Xie Songguang Yang Zhaoping Chen Xiaojing Wang | 2012 | Molecular Biology Reports2012，，4： | 1 |
| 17 | Minority Community Participation in Tourism:A Case of Kanas Tuva Villages in Xin-jiang,China显示文摘 | Wang Hui Yang Zhaoping etc | 2010 | Tourism Management2010，，31： | 1 |
| 18 | Solvothermal Growth of Sb2S3 Microcrystallites with Novel Morphologies显示文摘 | Liu Zhaoping Yang Baojun | 2004 | J Crystal growth2004，262，： | 1 |
| 19 | Shapecontrolled synthesis and growth mechanism of one-dimensional nanostruetures of trigonal tellurium显示文摘 | Liu Zhaoping Li Shu Yang You | 2003 | New J Chem2003，27，12： | 1 |
| 20 | Corrosion and irradiation behavior of Fe-based amorphous coating in lead-bismuth eutectic liquids显示文摘Lead-bismuth eutectics (LBE) have considerable potential as a candidate material for accelerator-driven sub-critical systems(ADS).However,LBE corrosion and irradiation damage are two urgent challenges remaining to be solved for impellers of primary pumps.In this study,we have explored the possibility of using Fe-based amorphous coatings to overcome LBE corrosion and concurrently to sustain irradiation damage.Specifically,the Fe_(54)Cr_(18)Mo_(2)Zr_(8)B_(18)amorphous coating was prepared by high-velocity oxygen-fuel (HVOF) spraying on 316L steel and exposed to saturated oxygen static LBE for 500 h at 400℃.The coating with high thermal stability (T_(g)=615℃ and T_(x)=660℃) effectively prevented the substrate steel from being corroded by LBE owing to its unique long-range disordered atomic packing.The coating also exhibited strong irradiation resistance when being subjected to 45 dpa (displacement per atom) Au ion irradiation at room temperature,with no sign of crystallization even at the maximum implantation depth of 300 nm.Consequently,the hardness of the coatings before and after irradiation increased slightly.The current findings shed new insights into understanding corrosion mechanism and irradiation behavior of amorphous solids in LBE and expand the application range of amorphous materials. | LU ZhiChao PENG Xiang Yang TANG YuHai HAN ShuYin WU Yuan FU EnGang DING XiangBin HOU Shuo LU GuangYao CAO PeiPei ZHANG YiBo LIU XiongJun MA Dong WANG Hui JIANG SuiHe LU ZhaoPing | 2022 | Science China(Technological Sciences)2022，65，2： | 1 |
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