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| 1 | Positive and negative terrains on northern Shaanxi Loess Plateau显示文摘黄土积极、否定的地面(P-N 地面) 在黄土高原上广泛地分布式,被从高分辨率的数字举起模型介绍它的特征,分界以及抽取方法第一次讨论。把 5 m 决定 DEM 用作原来的测试数据,在 Shaanxi 黄土高原的不同部分的 48 个 geomorphological 单位的 P-N 地面精确地被提取。然后,为描绘 geomorphologic 风景和 P-N 地面的空间配置特征的六指示物被建议。在 P-N 地面和黄土地势之间的这些指示物和关系的空间分发规则为黄土地形的进一步的理解被讨论。与 P-N 地面和传统的地面索引的集成,最后,一系列无指导的分类方法被使用在北 Shaanxi 做一个合适的地形分类。结果证明 P-N 地面是效果线索在黄土高原上揭示精力和物质分发规则。到在 Shaanxi 黄土高原的北方的来自南方的 P-N 地面的一个连续变化证明黄土地形和积极地面区域的明显的空间差别仅仅在这个区域占了 60.5% 。P-N 地面参加者地形分类方法增加结果的有效性,特别在黄土台地,黄土台地山脉和黄土低山的区域。这研究在有数字地面分析方法的黄土地形的学习上是重要的。 | ZHOU Yi TANG Guo'an YANG Xin XIAO Chenchao ZHANG Yuan LUO Mingliang | 2010 | Journal of Geographical Sciences2010，20，1： | 35 |
| 2 | The scaling method of specific catchment area from DEMs显示文摘特定的集水区域(SCA ) 被定义为一个联合起来的轮廓的在上游的集水区域。作为关键地面参数之一,它广泛地在当模特儿水文学,土壤侵蚀和生态的环境被使用。然而, SCA 价值在不同 DEM 分辨率显著地变化,它不可避免地影响地面分析结果。SCA 能被描述为集水区域(CA ) 和 DEM 格子长度的比率。在这份报纸, CA 的规模效果第一被调查。与 Jiuyuangou 溪谷,一个分水岭在中国的北 Shaanxi 省的大约 70 km2 作为测试区域, CA 上的 DEM 规模的影响在空间分发是不同的,这被发现。在 upslope 地点的 CA 价值与 DEM 分辨率的减少变得更大。当地点接近下游的区域时, CA 上的 DEM 规模的影响逐渐地正在变弱。CA 的规模效果能作为指数的衰落的一个数学趋势被结束。然后, SCA 的一个 downscaling 模型被介绍规模因素和地点因素提出。可伸缩的模型能在象素水平从粗糙的 DEM 分辨率认识到 SCA 价值的变换到更好的。downscaled SCA 好的实验结果表演修订了,并且与在关于统计索引,直方图和空间分发的目标决定的 SCA 一致。与没有实验参数的优点,可伸缩的模型能为在一个崎岖排水区域可伸缩的 SCA 被看作一个简单、客观的模型。 | YANG Xin TANG Guoan XIAO Chenchao GAO Yiping ZHU Shijie | 2011 | Journal of Geographical Sciences2011，21，4： | 12 |
| 3 | Corporate Governance, Ownership and Financial Distress of Publicly Listed Companies in China显示文摘This paper examines the effects of internal control mechanisms on the financial distress of publicly listed companies in China. Using t-test and Logistic regression analysis, we investigated the following aspects: ownership by top managers and the CEO, the number of directors, the percentage of inside directors, CEO duality, and ownership concentration. The empirical tests indicate a lower probability of financial distress when ownership by top managers and that by the CEO are higher. The evidence also shows that a combination of two parts, the CEO and the chairman of the board, may influence the internal control system of a publicly listed companies. | WangZhen LiuLi ChenChao | 2004 | Petroleum Science2004，1，1： | 12 |
| 4 | Boundary-layer transition prediction using a simplified correlation-based model显示文摘This paper describes a simplified transition model based on the recently developed correlation-based c Rehttransition model. The transport equation of transition momentum thickness Reynolds number is eliminated for simplicity, and new transition length function and critical Reynolds number correlation are proposed. The new model is implemented into an in-house computational fluid dynamics(CFD) code and validated for low and high-speed flow cases, including the zero pressure flat plate, airfoils, hypersonic flat plate and double wedge. Comparisons between the simulation results and experimental data show that the boundary-layer transition phenomena can be reasonably illustrated by the new model, which gives rise to significant improvements over the fully laminar and fully turbulent results. Moreover, the new model has comparable features of accuracy and applicability when compared with the original c Rehtmodel. In the meantime, the newly proposed model takes only one transport equation of intermittency factor and requires fewer correlations, which simplifies the original model greatly. Further studies, especially on separationinduced transition flows, are required for the improvement of the new model. | Xia Chenchao Chen Weifang | 2016 | Chinese Journal of Aeronautics2016，29，1： | 10 |
| 5 | Effects of raster resolution on landslide susceptibility mapping:A case study of Shenzhen显示文摘Resolution has been playing a significant role in landslide susceptibility mapping and hazard assessment.Based on geographical information system(GIS) and information model,the effects of raster resolution on landslide susceptibility mapping are studied in a central area of Shenzhen,China.Eight factors are selected to calculate landslide susceptibility with eleven groups of different resolutions(5 to 190 m).It has been found that a finer resolution does not necessarily lead to a higher accuracy of landslide susceptibility mappings,while the result of 90 m-resolution has the best accuracy and the 150 m-resolution has the worst one.The accuracy curve is in a shape of 'W' along with resolution decreasing:1) The accuracy decreases from 5 to 70 m;2) and then the best accuracy appears at 90 m,which is almost the same as the mean size of landslides in study area;3) the accuracy decreases again from 110 to 150 m;4) and finally the accuracy increases from 150 to 190 m.The sensitivity analysis indicates that the effects of raster resolution are mainly caused by the resolution impact on landform parameter derivation,while factors like geology and human activity are very insensitive to resolutions.A further study shows that in flat,ridge,and slope foot terrains,the susceptibility mapping result is sensitive to resolution,but in the sloping surface area the sensitivity is much less sensitive to resolution.At last,by choosing study areas with different sizes,it has also been found that the optimal resolutions are variable due to size of study area.But the study area is larger than a threshold,which is 135 km2 in this study,and the optimal resolution is almost fixed. | TIAN Yuan,XIAO ChenChao,LIU Yu & WU Lun Institute of RS and GIS,Peking University,Beijing 100871,China | 2008 | Science China(Technological Sciences)2008，51，S2： | 8 |
| 6 | A new method of pseudo absence data generation in landslide susceptibility mapping with a case study of Shenzhen显示文摘Landslide susceptibility mapping is a typical two-class classification problem where generating pseudo absence (non-slide) data plays an important role.In this paper,a new method,target space exteriorization sampling method (TSES),is presented to generate pseudo absence data based on presence data directly in feature space.TSES exteriorizes a presence sample to become a pseudo absence one by replacing the value of one of its features with a new one outside the value range of this feature of all presence data.This method is compared with two existing methods,buffer controlled sampling (BCS) and iteratively refined sampling (IRS),in a study area of Shenzhen city.The pseudo absence data generated by each of these three methods are organized into 20 subsets with increasing data sizes to study the effects of the proportion of pseudo absence data to presence data.The landslide susceptibility maps of the study area are calculated with all these datasets by general additive model (GAM).It can be concluded that,through a 10-fold validation,TSES and IRS-based models have similar AUC values that are both greater than that of BCS,but TSES outperforms BCS and IRS in prediction efficiency.TSES results also have more reasonable spatial and histogram distributions than BCS and IRS,which can support categorization of an area into more susceptibility ranks,while IRS shows a tendency to separate the whole study area into two susceptibility extremes.It can be also concluded that when using BCS,the pseudo absence data proportion to the presence data would be about 50% to get a considerable result,while for IRS or TSES the minimum proportion is 40%. | XIAO ChenChao TIAN Yuan SHI WenZhong GUO QingHua WU Lun | 2010 | Science China(Technological Sciences)2010，53，S1： | 7 |
| 7 | Terrain revised model for air temperature in mountainous area based on DEMs: A case study in Yaoxian county显示文摘In mountainous area, spatial interpolation is the traditional method to calculate air temperature by use of observed temperature data. Due to lack of sufficient observation data in mountainous areas many precise interpolation methods could give only coarse result which could not meet the demand of precision agriculture and local climate exploration. Based on DEMs of 25 m resolution, a reversed model is constructed, with which temperature is simulated to the corresponding slope unit from the solar radiation. Taking Yaoxian county as a test area, and mean monthly temperature data as basic information sources, which are collected from 15 weather stations around Yaoxian county in Shaanxi province from the year of 1970 to 2000, a simulation for the solar radiation cell by cell is completed. By simulating solar radiation at each slope and flat cell unit, the terrain revised temperature model could be realized. A comparison between the simulated temperature and the radiation temperature from TM6 thermal infrared image shows that the terrain improved model gets a finer temperature distribution at local level. The accuracy of simulated temperature in mountainous area is higher than it is in flat area. | YANG Xin TANG Guoan XIAO Chenchao DENG Fengdong | 2007 | Journal of Geographical Sciences2007，17，4： | 7 |
| 8 | Development Study on Some Digestive Enzymes of Takifugu rubripes Larvae and Juvenile显示文摘The activities of some digestive enzymes are studied for Takifugu rubripes larvae and juvenile from the first feeding to 27 d after hatching at selected stages of development. The homogenate of whole larvae body is used for enzymatic determination. Activity of acid protease decreases notably during the beginning days after the commencement of completely exogenous feeding and the days before the beginning of the juvenile stage. Alkaline protease specific activity also decreases at metamorphosis. The activities are associated with the morphology of the developing digestive tract. Amylase activity increases before the first feeding, followed by a decreasing and then a rather constant level. Lipase activity remains low during the larvae and juvenile periods. Alkaline phosphatase activity increases gradually. This reflects the development of brush border membranes of enterocytes. | WANZhenzhen GAOTianxiang ZHANGXiumei CHENChao | 2004 | Journal of Ocean University of China2004，3，2： | 4 |
| 9 | H19 promotes pancreatic cancer metastasis by derepressing let-7’s suppression on its target HMGA2-mediated EMT显示文摘 | Chenchao Ma Kate Nong Hongda Zhu Weiwei Wang Xinyu Huang Zhou Yuan Kaixing Ai | 2014 | Tumor Biology2014，，9： | 3 |
| 10 | Research of Tribological Behaviors of a New Aluminum Bronze显示文摘The tribological behaviors were investigated in a new high strength and wear resistant aluminum bronze, with its friction coefficient and wear-rate lower than those of ZQA19-4 and ZQ All 0-4-4 alloys in terms of Chinese national standard. The results showed that different tribological behaviors were attributed material itself. Under boundary lubrication condition, major wear mechanisms of aluminum bronze are adhesive wear and attrition wear. Its wearability depends mainly on material microstructure, shedding hard-particles, rakes and small pits that can store lubricant. The new aluminum bronze may find wide application in high sliding speed, heavy load and boundary lubrication condition. | XUJian-lin WANGZhi-ping CHENChao | 2004 | 材料热处理学报2004，25，05B： | 2 |
| 11 | Energies of ls^2ng and ls^2nh (n = 5, 6, 7, and 8) States for Lithium Isoelectronic Sequence显示文摘The nonrelativistic energies for lithium isoelectronic sequence ls^2ng and ls^2nh (n=5, 6, 7, and 8) states from Z=3 to 8 are calculated by using a full core plus correlation (FCPC) method with multiconfiguration interaction wave functions. Relativistic and mass-polarization effects on the energy are evaluated as the first-order perturbation theory. Our predicted excitation energies are compared with previous experimental results in the literature. | CHENChao WANGZhi-Wen | 2005 | Communications in Theoretical Physics2005，43，5： | 1 |
| 12 | 显示文摘 | HURong(胡荣) RENZhi-Min(任志敏) CHENChao(陈超) etal | 2012 | 材料导报2012，26，2： | 1 |
| 13 | Somatostatin 4 regulates growth and modulates gametogenesis in zebrafish显示文摘Somatostatin(SST)plays important roles in growth and development.In teleost fishes six SST encoding genes(sst1 to sst6)have been identified although few studies have addressed their function.Here we aim to determine the function of the teleost specific sst4 in the zebrafish.A CRISPR/Cas9 sst4 zebrafish mutant with loss of function(sst4−/−)was produced which grew significantly faster and was heavier at the onset of gonadal maturation than the wild type(WT).Consistent with their faster growth,liver igf1,igf2a and igf2b expression was significantly upregulated in the sst4−/−fish compared to the WT.Histological examination of the ovaries and testis indicated that sst4−/−fish had slightly delayed testicular gametogenesis compared to the WT.Significantly lower expression of igf3,amh,insl3,hsd17b3,hsd11b2,hsd20b,cyp11b and cyp17 was consistently observed in the sst4−/−testis.In contrast,the ovaries had lower expression of igf1,igf2a and cyp19a1a but increased expression of igf2b and hsd20b.The gonadotrophin beta subunits(fshb and lhb)in the brain were downregulated indicating the brain-pituitary-gonadal axis was downregulated in the sst4−/−fish and suggesting that the steroid production is compromised in the maturing gonads.In addition,analysis of sst1 and sst3 mRNA levels in sst4−/−fish suggests a dosage compensation effect of sst1 in the brain and liver.Altogether,the results from the zebrafish sst4−/−line support the idea that sst4 is involved in the regulation of igf signalling,somatic growth and reproduction since steroidogenesis and gametogenesis at pubertal onset were compromised. | Chenchao Sui Jie Chen Jing Ma Wenting Zhao Adelino V.M.Canário Rute S.T.Martins | 2019 | Aquaculture and Fisheries2019，4，6： | 1 |
| 14 | Boundary-layer transition prediction using a simplified correlation-based model显示文摘 | Chenchao Xia Weifang Chen | 2015 | Chinese Journal of Aeronautics2015，，： | 1 |
| 15 | 显示文摘 | LIUHong-lai LUWeihua CHENChao(刘洪来 鲁为华 陈超) | 2013 | 草地学报2013，19，5： | 1 |
| 16 | 显示文摘 | ZHANHong-Quan(展红全) JIANGXiang-Ping(江向平) CHENChao(陈超) etal | | WujiHuaxueXuebao0，，： | 1 |
| 17 | Experimental study on the whip elimination of rotor-bearing systems with electromagnetic exciters显示文摘 | Chenchao F Minchun P | 2011 | Mechanism and Machine Theory2011，，46： | 1 |
| 18 | Determining tech nology trends and forecasts of RFID by a historical review and bibliometric analysis from 1991 to 2005显示文摘 | Chia Chenchao Jiann Minyang Wen Yuanjen | 2007 | Technovation2007，，5： | 1 |
| 19 | 显示文摘 | WANGHong(王荣) XUJin(徐进) CHENChao(陈朝) | | FaguangXuebao0，，： | 1 |
| 20 | Nonlinear Inversion of Potential-Field Data Using an Improved Genetic Algorithm显示文摘The genetic algorithm is useful for solving an inversion of complex nonlinear geophysical equations. The multi-point search of the genetic algorithm makes it easier to find a globally optimal solution and avoid falling into a local extremum. The search efficiency of the genetic algorithm is a key to producing successful solutions in a huge multi-parameter model space. The encoding mechanism of the genetic algorithm affects the searching processes in the evolution. Not all genetic operations perform perfectly in a search under either a binary or decimal encoding system. As such, a standard genetic algorithm (SGA) is sometimes unable to resolve an optimization problem such as a simple geophysical inversion. With the binary encoding system the operation of the crossover may produce more new individuals. The decimal encoding system, on the other hand, makes the mutation generate more new genes. This paper discusses approaches of exploiting the search potentials of genetic operations with different encoding systems and presents a hybrid-encoding mechanism for the genetic algorithm. This is referred to as the hybrid-encoding genetic algorithm (HEGA). The method is based on the routine in which the mutation operation is executed in decimal code and other operations in binary code. HEGA guarantees the birth of better genes by mutation processing with a high probability, so that it is beneficial for resolving the inversions of complicated problems. Synthetic and real-world examples demonstrate the advantages of using HEGA in the inversion of potential-field data. | FengGangding ChenChao | 2004 | Journal of China University of Geosciences2004，15，4： | 1 |
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