Reconstructing the landing trajectory of the CE-3 lunar probe by using images from the landing camera

An accurate determination of the landing trajectory of Chang＇e-3 （CE-3） is significant for verifying orbital control strategy, optimizing orbital planning, accu- rately determining the landing site of CE-3 and analyzing the geological background of the landing site. Due to complexities involved in the landing process, there are some differences between the planned trajectory and the actual trajectory of CE-3. The land- ing camera on CE-3 recorded a sequence of the landing process with a frequency of 10 frames per second. These images recorded by the landing camera and high-resolution images of the lunar surface are utilized to calculate the position of the probe, so as to reconstruct its precise trajectory. This paper proposes using the method of trajectory reconstruction by Single Image Space Resection to make a detailed study of the hov- ering stage at a height of 100 m above the lunar surface. Analysis of the data shows that the closer CE-3 came to the lunar surface, the higher the spatial resolution of im- ages that were acquired became, and the more accurately the horizontal and vertical position of CE-3 could be determined. The horizontal and vertical accuracies were 7.09 m and 4.27 m respectively during the hovering stage at a height of 100.02 m. The reconstructed trajectory can reflect the change in CE-3＇s position during the powered descent process. A slight movement in CE-3 during the hovering stage is also clearly demonstrated. These results will provide a basis for analysis of orbit control strategy, and it will be conducive to adjustment and optimization of orbit control strategy in follow-up missions.

Population Spatial Distribution Based on Luojia 1-01 Nighttime Light Image:A Case Study of Beijing

With the continuous development of urbanization in China,the country’s growing population brings great challenges to urban development.By mastering the refined population spatial distribution in administrative units,the quantity and agglomeration of population distribution can be estimated and visualized.It will provide a basis for a more rational urban planning.This paper takes Beijing as the research area and uses a new Luojia1-01 nighttime light image with high resolution,land use type data,Points of Interest(POI)data,and other data to construct the population spatial index system,establishing the index weight based on the principal component analysis.The comprehensive weight value of population distribution in the study area was then used to calculate the street population distribution of Beijing in 2018.Then the population spatial distribution was visualize using GIS technology.After accuracy assessments by comparing the result with the WorldPop data,the accuracy has reached 0.74.The proposed method was validated as a qualified method to generate population spatial maps.By contrast of local areas,Luojia 1-01 data is more suitable for population distribution estimation than the NPP/VIIRS(Net Primary Productivity/Visible infrared Imaging Radiometer)nighttime light data.More geospatial big data and mathematical models can be combined to create more accurate population maps in the future.

BACKGROUND RECTIFICATION AND FEATURE EXTRACTION OF IMAGE IN A SPOT WELD OF AL ALLOY X-RAY DETECTION

A primary study on Processing in X - ray inspection of spot weld for aluminum alloy spot welding,in- cluding for background simulation,acquisition of ideal binary image, and extraction and identifi- cation of defect features was presented.

Example-based super-resolution for single-image analysis from the Chang'e-1 Mission

Due to the low spatial resolution of images taken from the Chang＇e-1 （CE-I） orbiter, the details of the lunar surface are blurred and lost. Considering the limited spatial resolution of image data obtained by a CCD camera on CE-1, an example-based super-resolution （SR） algorithm is employed to obtain high- resolution （HR） images. SR reconstruction is important for the application of image data to increase the resolution of images. In this article, a novel example-based algorithm is proposed to implement SR reconstruction by single-image analysis, and the computational cost is reduced compared to other example-based SR methods. The results show that this method can enhance the resolution of images using SR and recover detailed information about the lunar surface. Thus it can be used for surveying HR terrain and geological features. Moreover, the algorithm is significant for the HR processing of remotely sensed images obtained by other imaging systems.

Eurovet Unveils the New Image of Hong Kong Mode Lingerie 2010 March 30-31, at the Hong Kong Convention and Exhibition Centre

Organized by Eurovet, the world’s leading lingerie and beachwear trade show organizer and supported by Hong

On the loss of cultural images in translation

In cultural translation the loss of cultural images often occurs. In most cases translators do so in order to make the target text understood more easily by the readers of the target language. But the result is worse quite often, because it usually affects correct transmission of the source text as a whole, what＇s even worse, it will affect the correct grasp of the artistic conception and figures of the source text. And in other cases it is impossible to make source cultural images reappear in the target text. This paper provides some sound examples and reviews of the above.

From Concrete Object ＂Tress＂ of English Poems to Abstract Image in Chinese Counterparts

Image is an important and creative way to express poets＂ feelings in both Chinese and English poetry. There are concrete representations and abstract concept in image. They are two key notions in Poetics and Aesthetics. This paper is to show the different versions of ＂tress＂ in poems and to explore the exact nature of concepts of sensitive affection in English and Chinese, so as to appreciate the artistic beauty of images.

Wavelet Analysis of Space Solar Telescope Images

The scientific satellite SST (Space Solar Telescope) is an important research project strongly supported by the Chinese Academy of Sciences. Every day, SST acquires 50 GB of data (after processing) but only 10GB can be transmitted to the ground because of limited time of satellite passage and limited channel volume. Therefore, the data must be compressed before transmission. Wavelets analysis is a new technique developed over the last 10 years, with great potential of application. We start with a brief introduction to the essential principles of wavelet analysis, and then describe the main idea of embedded zerotree wavelet coding, used for compressing the SST images. The results show that this coding is adequate for the job.

Inhibition of Notch 1 signaling in the subacute stage after stroke promotes striatal astrocyte-derived neurogenesis

Inhibition of Notch1 signaling has been shown to promote astrocyte-derived neurogenesis after stroke.To investigate the regulatory role of Notch1 signaling in this process,in this study,we used a rat model of stroke based on middle cerebral artery occlusion and assessed the behavior of reactive astrocytes post-stroke.We used theγ-secretase inhibitor N-[N-(3,5-diuorophenacetyl)-1-alanyl]-S-phenylglycine t-butylester(DAPT)to block Notch1 signaling at 1,4,and 7 days after injury.Our results showed that only administration of DAPT at 4 days after stroke promoted astrocyte-derived neurogenesis,as manifested by recovery of white matter fiber bundle integrity on magnetic resonance imaging,which is consistent with recovery of neurologic function.These findings suggest that inhibition of Notch1 signaling at the subacute stage post-stroke mediates neural repair by promoting astrocyte-derived neurogenesis.

A super-high angular resolution principle for coded-mask X-ray imaging beyond the diffraction limit of a single pinhole

High angular resolution X-ray imaging is always useful in astrophysics and solar physics. In principle, it can be performed by using coded-mask imaging with a very long mask-detector distance. Previously, the diffraction-interference effect was thought to degrade coded-mask imaging performance dramatically at the low energy end with its very long mask-detector distance. The diffraction-interference effect is described with numerical calculations, and the diffraction-interference cross correlation reconstruction method （DICC） is developed in order to overcome the imaging performance degradation. Based on the DICC, a super-high angular resolution principle （SHARP） for coded-mask X-ray imaging is proposed. The feasibility of coded mask imaging beyond the diffraction limit of a single pinhole is demonstrated with simulations. With the specification that the mask element size is 50 × 50 μm^2 and the mask-detector distance is 50 m, the achieved angular resolution is 0.32arcsec above about 10keV and 0.36arcsec at 1.24keV （λ = 1 nm）, where diffraction cannot be neglected. The on-axis source location accuracy is better than 0.02 arcsec. Potential applications for solar observations and wide-field X-ray monitors are also briefly discussed.

An image compression method for space multispectral time delay and integration charge coupled device camera

Multispectral time delay and integration charge coupled device （TDICCD） image compression requires a low- complexity encoder because it is usually completed on board where the energy and memory are limited. The Consultative Committee for Space Data Systems （CCSDS） has proposed an image data compression （CCSDS-IDC） algorithm which is so far most widely implemented in hardware. However, it cannot reduce spectral redundancy in mukispectral images. In this paper, we propose a low-complexity improved CCSDS-IDC （ICCSDS-IDC）-based distributed source coding （DSC） scheme for multispectral TDICCD image consisting of a few bands. Our scheme is based on an ICCSDS-IDC approach that uses a bit plane extractor to parse the differences in the original image and its wavelet transformed coefficient. The output of bit plane extractor will be encoded by a first order entropy coder. Low-density parity-check-based Slepian-Wolf （SW） coder is adopted to implement the DSC strategy. Experimental results on space multispectral TDICCD images show that the proposed scheme significantly outperforms the CCSDS-IDC-based coder in each band.

The Influence of Culture and Biographical Variables on the Brand Image of Google and Baidu: An Exploratory Study in Guangzhou,China

The study found significant correlations between the culture dimensions of Confucian work dynamism,humanheartedness and moral discipline and the brand image dimensions of online search engines.It was also found that several significant relationships exist between the biographical variables of age and education and the brand image dimensions,and that culture and biographical variables have a linear relationship with brand image.The findings highlight that culture and biographical information can influence Chinese consumer perceptions of an international or local brand.Organizations thus need to align their brands with the culture and biographical profile of their target markets.

性能保障 Saab 9-4X Concept

一直以来,萨博给我的最大感受是其出色的性能。从第一个使用涡轮增压到第一个提出双涡轮增压,萨博的陆上飞行梦想一直在不断实现。在SUV和Crossover(交叉)车型风行的今天,萨博也推出了他们以出色的性能作为保障的交叉车型—萨博9-4X生态动能概念车。萨博9-4X生态动能概念车的设计体现出了强烈的斯堪的纳维亚风格,外形简约、

Ghost Images in Schmidt CCD Photometry

The wide field of the Schmidt telescope implies a greater chance of the field containing bright objects, and the presence of a corrector lens produces a certain type of ghost images. We summarize and confirm the features of such ghost images in Schmidt CCD photometry. The ghost images could be star-like under special observational conditions. The zenith distance of the telescope, among other factors, is found to correlate with different patterns of the ghost images. Some relevant issues are discussed and possible applications of our results are suggested.

Value of CA19-9, CA125 and CEA combined magnetic resonance imaging in the diagnosis of pancreatic cancer

Objective:To study the value of CA19-9, CA125 and CEA combined magnetic resonance imaging (MRI) in the diagnosis of pancreatic cancer, and to provide a reference for clinical diagnosis and treatment.Methods:A total of 110 cases of pancreatic cancer admitted to our hospital from November 2015 to November 2017 were selected as the observation group, and another 80 normal pancreas organizers who participated in the physical examination in the same period were selected as the control group. The change of magnetic resonance scanning parameters and serum CA19-9, CA125 and CEA detection were compared between the two groups of subjects at the same time, contrast scan and serum magnetic resonance detection of CA19-9, CA125 and CEA positive rate, and to evaluate the four alone and in combination with the diagnosis of pancreatic cancer specificity, sensitivity, negative predictive value and positive predictive value.Results:The T1WI of the observation group was low or slightly low signal, T2WI was slightly high signal, and the tumor of fat suppression sequence was low signal, which was in line with the typical characteristics of pancreatic cancer. The serum levels of CA19-9, CA125 and CEA in the observation group were significantly higher than those in the control group, and the difference was statistically significant. Compared with the two groups, the positive rates of MRI and serum CA19-9, CA125 and CEA in the observation group were higher than those in the control group, and the difference was statistically significant. The sensitivity and accuracy of MRI scan combined with three serological markers were higher than those of single detection. The specificity was between four.Conclusion: CA19-9, CA125 and CEA combined magnetic resonance imaging (MRI) have good sensitivity and accuracy in diagnosis of pancreatic cancer, but their specificity is common, which should be used for reference.

Preliminary Exploration on the Application of Saussure Sign Concept in Bio-Inspired Design: A Case of Tiantoushui Doll-Design

Simply, shape bionics is to extract an image feature of natural objects, and most of the techniques for transforming and presenting are focused on metaphorical effects. In particular, the extraction process of metaphor design seems to be related to the concept of Saussure signs. Therefore, this research took the doll design of the Tiantoushui community in Changhua County, Taiwan as an example and attempted to use the Saussure concept to extract and evaluate the signs of bio-inspired design. The results showed that a total of three doll works symbolized respectively rice, guava, and pomelo implied the signification of local region by integrating the Saussure code image with the sign-image of the regional nature and transforming its content into “commodity design” and further transferring into “the product value of cultural and creative”. In addition, the specific extraction process included 1) Extraction of image—adjectives in creative products;2) Meaning space of image—adjec- tives in creative products;3) Extraction and determination of design elements of creative products, and 4) Combined the sensibility of creative products and design elements to derive design rules. After preliminary exploration of the extraction steps above, a concrete and efficient bio-inspired design process was proposed in this work. Besides, it was inferred that if further combined with the post-modern design style, it may not only simplify the design elements of creative products but also enhance the design connotations in the future.

基于“言-象-意”关系的《楚辞》园林意境解译

《楚辞》是中国浪漫主义文学的源头和文学史上的瑰宝,描绘了楚国的人居环境和园林场景。基于“言-象-意”关系和意境心理发生机制,研究《楚辞》中的园林意境及其承载的思想内涵,分别对“大内御苑”“离宫苑囿”“贵族宅园”3类园林的场景意境解译,反映楚国园林“天人合一”,人本主义、浪漫主义、仙境的人居思想和君权至上的思想与情感。

科学服务人民--“十七年”时期中国科学家形象的建构与流变

中华人民共和国“十七年”时期,中国科学家的事迹和形象在国家层面的宣传报道中获得丰富呈现,形成了极具时代特色的艺术化表达,体现了国家科学观与媒介宣传之间的互动关系。文章通过对主流报纸、画报、宣传画等图文材料的整理,并结合科技史料对“十七年”时期的中国科学家形象进行系统分析,发现科学家形象的呈现随人才政策的转变而逐步分化,其分化始终围绕“科学服务人民”的主流国家科学观展开,与国家科技事业的发展紧密呼应。科学家形象的展示承载了新中国科技发展的美好愿景,但是由于对科技人才工作的浅层理解,形象呈现趋于样板化和模式化。研究对于当下追溯科学家精神,选树榜样人物,做好主流宣传具有重要借鉴意义。

宫廷剧中值得推崇的“她力量”——以《卿卿日常》为例

宫廷剧是我国颇具特色的剧集类型,近年的“她题材”宫廷剧关注女性群像,反映出女性在爱情与事业等方面的不同处境、成长和蜕变。“家和”应是宫廷剧体现的朴素且持久的家国观念与理想,和衷共济应是宫廷剧中值得推崇与守护的“她力量”,也是宫廷剧中女性群像重构与突破的根本方向。

回归史料本身——图像证史问题的档案学思考路径及其反思

图像证史问题既是传统艺术史领域的重要议题,也是图像研究进入历史学领域的重要前提。图像虽已作为新的史料依据和证据来源进入历史学实践,但图像资料在“可信度”与“清晰度”上的困境,以及其作为文字叙述补充的附属地位影响其入史的限度与可能性,引发历史学理论层面对于史料观念的思考。此番问题的讨论究其根源在于当前史学领域虽在应用领域关注图像史料,但是仍旧未能脱离文字史料研究的路径惯性,因此也就未能对图像自身特殊的记录方式及其所决定的多元内容信息予以理论视角的明晰。以档案学视角重新审视图像证史的问题本质与作用机制,借图像资料本身的档案属性与史料特质,图像得以进入历史研究的视野进而成为客观、原始的文本依据,继而完成图像入史的研究前提;而要真正实现图像证史的目的,则要全面的认识图像的内容构成及其所对应的历史联系,以更为详细、全面的文献记载还原更为复杂、多面的历史事实。所以图像证史问题的讨论要回归图像史料的记录特性本身,在史料的求真、求新之外更要求全,在实现完整、系统的史料观念认知与运用的同时,也为更多的相关问题提供思路与方法借鉴。