1,555 research outputs found
She jiao quan li gan zai she jiao he fei she jiao ling yu dui xiao fei zhe xing wei de ying xiang
No full textJia, Yanli.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 84-100).Abstracts also in Chinese.Title from PDF title page (viewed on 30, September, 2016).Jia, Yanli
Symplocodes marmorata subsp. marmorata marmorata (Brunner von Wattenwyl 1893
No full textSymplocodes marmorata marmorata (Brunner von Wattenwyl, 1893) (Figures 1C, D, 3A – L, 8G – I) Phyllodromia marmorata Brunner von Wattenwyl, 1893: 19. Hemithyrsocera marmorata: Shelford, 1912: 661. Symplocodes marmorata: Princis, 1971: 1130; Roth, 1999: 137. Phyllodromia feae Shelford, 1908: 13. Symplocodes feae: Princis, 1971: 1130. Materials examined Two males, China, Xizang Aut. Reg., Motuo, 1050 m, 1 August 1979, coll. GT Jin and JY Wu; one male, China, Yunnan Prov., Yingjiang, Nabang, 282 m, 11 July 2012, coll. D Wang; one male, China, Xizang Aut. Reg., Motuo, 9 July 2013, coll. KL Wu. (SWU) Distribution China (Yunnan, Xizang); Myanmar, Thailand.Published as part of Zheng, Yuhong, Wang, Chenchen, Che, Yanli & Wang, Zongqing, 2015, The species of Symplocodes Hebard (Blattodea: Ectobiidae: Blattellinae) with description of a new species from China, pp. 339-361 in Journal of Natural History 50 on page 345, DOI: 10.1080/00222933.2015.1079337, http://zenodo.org/record/399208
Profiling and characterization of deep learning model inference on CPU
No full textWith the rapid growth of deep learning models and higher expectations for their accuracy and throughput in real-world applications, the demand for profiling and characterizing model inference on different hardware/software stacks is significantly increased. As the model inference characterization on GPU has already been extensively studied, it is worth exploring how performance-enhancing libraries like Intel MKL-DNN help to boost the performance on Intel CPU. We develop a profiling mechanism to capture the MKL-DNN operation calls and formulate the tracing timeline with spans on the server. Through profiling and characterization that give insights into Intel MKL-DNN, we evaluate and demonstrate that the optimization techniques, including blocked memory layout, layers fusion, and low precision operation used in deep learning model inference, have accelerated the performance on the Intel CPU.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-05-01The student, Yanli Qian, accepted the attached license on 2020-04-28 at 07:31.The student, Yanli Qian, submitted this Thesis for approval on 2020-04-28 at 07:33.This Thesis was approved for publication on 2020-04-28 at 10:42.DSpace SAF Submission Ingestion Package generated from Vireo submission #15088 on 2020-08-25 at 17:41:19Made available in DSpace on 2020-08-27T00:50:04Z (GMT). No. of bitstreams: 2
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Integration of mid-infrared SOI photonics with microfluidics
No full text This work describes the integration of mid-infrared (MIR) silicon photonics with PDMS microfluidics to perform absorption spectroscopy of IPA-water solutions. The MIR spectral region contains strong absorption bands for many molecules, and photonic devices operating in the MIR can be used in many sensing applications. In this work a preliminary demonstration of a silicon-on-insulator (SOI) device is carried out in which the transmission spectra of different concentrations of water-IPA solutions are measured at wavelengths between 3.725 μm and 3.888 μm. A PDMS microfluidic channel is integrated with the waveguides in order to improve the repeatability of sample handing, reduce reagent volumes and prevent evaporation of the analyte. A microfluidic channel with 3000 x 100 μm cross-section and 30 mm length is bonded to a SOI chip comprising 500 nm thick rib waveguides and a 2 μm thick SiO2 top cladding isolating the waveguide mode from the analyte. Trenches were patterned into the SiO2 cladding to create sensing windows of varying lengths (10 μm to 3mm) along different waveguides. The devices were used to detect an expected IPA absorption peak at 3.77 μm, and concentration as low as 3% IPA in water (by volume) was detected. Further work will focus on increasing the sensitivity of the measurement by using increased interaction lengths, reduction of noise and instability, and on the detection of drugs using transmission measurements over a broader wavelength range. </p
Dang dai Zhongguo gu wan quan wei di wei de he fa hua yan jiu
No full text全民收藏熱的興起是中國經濟改革以來的顯著文化現象之一，其中古玩收藏從過去特權階層的風雅嗜好，變成了如今全民參與的業餘文化生活，但事實上，古玩與特權階層的聯繫卻並沒有隨著其平民化的進程而徹底消解，而是在這一過程中重新生成了一套遊戲規則，將新時代的收藏者們劃分類別、區隔層次。具體的劃分依據即是個體藏品的品質以及收藏者的"眼力"。什麼是眼力？它如何習得？持有者經由何種途徑獲得認可而使其成爲古玩權威？權威的等級高低如何劃分？不同層級的權威分別置身於什麼樣的社會層位？個體將以何種方式宣告這一社會地位的合法性？本文以中國南方一個三線城市的個案研究來探索這些問題，故事中的兩位主角自1990年代脫離體制單位、下海經商，後轉入古玩界發展，完成了由草根轉變為古玩權威的身份蛻變，並由此進入了地方的精英階層。這一過程歷時近二十年，從改革初期橫跨至今。在這一時段的中國社會，人群發生大規模的重組，新的階層結構亦正在形成。對此，學界達成共識的一些看法是：改革時期實現個體資本合法化、達成向上社會流動的主要渠道仍是正規的學校教育，並且當個體獲得了某種社會地位之後，往往以消費作爲宣告其身份合法性的手段。那麼，是否存在著其他替代性的流動渠道與資本合法化的方式呢？具體到古玩收藏的場域，個案中的兩位主角並沒有很好的機會接受教育，他們主要以自學和市場買賣等渠道習得古玩界定知識，然後以舉辦大型展覽的方式獲得前輩專家權威的認可，以此樹立起自身的權威地位。但在實踐這種長輩授予式的合法化程序中，他們卻意外地遭遇了長輩失德、真僞不辨等一系列顛覆權威合法性依據的問題，致使程序未能按計劃完成，作爲文化資本的"眼力"亦未能盡數轉化為象徵資本，但其中已然轉化成功的那一部分，也給他們帶來了一定的榮譽和地位，使之獲得了地方政協委員和省文史館館員等重要的社會身份，意味著國家對個體的鑑定眼力給予了正式的認可。兩位草根出身的古玩行家由此躋身於以政協關係為中心的地方精英圈中，與受過高等教育的其他專家型成員一並享有近似的人生機遇，這些國家頭銜也因此而成爲了他們強調合法地位的主要表達。本研究著力於這一眼力合法化過程的分析，意在呈現當代古玩收藏場域遊戲規則的同時，從中揭示社會轉型時期如何在非常規渠道中建構個體身份合法性並實現社會流動的一種可能。Since the late 1980s, antique collecting has become a nationwide consumption craze among Chinese people from all walks of life. A set of cultural norms has emerged to distinguish different contemporary collectors from one another. The key of making such distinction lies in evaluating individuals’ quality of collection and authenticating skills, their "discerning eye" or yanli in Chinese. As a result, individuals are categorized into two groups: ordinary collectors with varying levels of yanli, and highly ranked antique authorities with professionally recognized yanli. What is the mechanism of such an evaluation? And what’s the nature of the categorization?This research explores the hierarchical structure of antique-collectors by examining the legitimization process of yanli. My fieldwork was conducted in a city in south China, focusing on the occupational paths of two individuals. Though lacking in higher education, they taught themselves knowledge of antiques and honed their authenticating skills through trading, and later showed their yanli to the public by putting on exhibitions, where a number of senior antique authorities were invited as special guests. It is in the presence of these senior authorities that the quality of exhibitions were affirmed and the yanli of my informants was professionally recognized. After staging a series of exhibitions from the late 1990s to the mid 2000s, they successfully managed to become antique authorities and eventually obtained the membership in the local elite class, meeting with politically powerful and with highly educated individuals as equals. I thus use their life stories to demonstrate the occupational mobility in the antiques field from 1990s to the present, showing how yanli has been legitimized and how the result of this legitimization fit into the picture of emerging class structure in post-socialist China.Detailed summary in vernacular field only.Detailed summary in vernacular field only.Detailed summary in vernacular field only.Detailed summary in vernacular field only.武洹宇.Parallel title from added title page.Thesis (Ph.D.) Chinese University of Hong Kong, 2015.Includes bibliographical references (leaves 268-277).Abstracts also in English.Wu Yuanyu
Divergent evolution of male-determining loci on proto-Y chromosomes of the housefly
No full textAbstract Houseflies provide a good experimental model to study the initial evolutionary stages of a primary sex-determining locus because they possess different recently evolved proto-Y chromosomes that contain male-determining loci ( M ) with the same male-determining gene, Mdmd . We investigate M -loci genomically and cytogenetically revealing distinct molecular architectures among M -loci. M on chromosome V ( M V ) has two intact Mdmd copies in a palindrome. M on chromosome III ( M III ) has tandem duplications containing 88 Mdmd copies (only one intact) and various repeats, including repeats that are XY-prevalent. M on chromosome II ( M II ) and the Y ( M Y ) share M III -like architecture, but with fewer repeats. M Y additionally shares M V -specific sequence arrangements. Based on these data and karyograms using two probes, one derives from M III and one Mdmd -specific, we infer evolutionary histories of polymorphic M -loci, which have arisen from unique translocations of Mdmd , embedded in larger DNA fragments, and diverged independently into regions of varying complexity
Information literacy course design based on student survey: The practice of subject librarians at NSL, CAS
No full textBalancing role of nitric oxide in complement-mediated activation of platelets from mCd59a and mCd59b double-knockout mice
No full textCD59 is a membrane protein inhibitor of the membrane attack complex (MAC) of complement. mCd59 knockout mice reportedly exhibit hemolytic anemia and platelet activation. This phenotype is comparable to the human hemolytic anemia known as paroxysmal nocturnal hemoglobinuria (PNH), in which platelet activation and thrombosis play a critical pathogenic role. It has long been suspected but not formally demonstrated that both complement and nitric oxide (NO) contribute to PNH thrombosis. Using mCd59a and mCd59b double knockout mice (mCd59ab−/− mice) in complement sufficient (C3+/+) and deficient (C3−/−) backgrounds, we document that mCd59ab−/− platelets are sensitive to complement-mediated activation and provide evidence for possible in vivo platelet activation in mCd59ab−/− mice. Using a combination of L-NAME (a NO-synthase inhibitor) and NOC-18 or SNAP (NO-donors), we further demonstrate that NO regulates complement-mediated activation of platelets. These results indicate that the thrombotic diathesis of PNH patients could be due to a combination of increased complement-mediated platelet activation and reduced NO-bioavailability as a consequence of hemolysis. Am. J. Hematol. 2009. © 2009 Wiley-Liss, Inc
ABI4 Mediates Antagonistic Effects of Abscisic Acid and Gibberellins at Transcript and Protein Levels
No full textAbscisic acid (ABA) and gibberellins (GA) are plant hormones which antagonistically mediate numerous physiological processes, and their optimal balance is essential for normal plant development. However, the molecular mechanism underlying ABA and GA antagonism still needs to be determined. Here, we report that ABA- INSENSITIVE 4 (ABI4) is a central factor for GA/ABA homeostasis and antagonism in post-germination stages. ABI4 over-expression in Arabidopsis (OE-ABI4) leads to developmental defects including a decrease in plant height and poor seed production. The transcription of a key ABA biosynthetic gene, NCED6, and of a key GA catabolic gene, GA2ox7, is significantly enhanced by ABI4 over-expression. ABI4 activates NCED6 and GA2ox7 transcription by directly binding to the promoters, and genetic analysis revealed that mutation in these two genes partially rescues the dwarf phenotype of ABI4 overexpressing plants. Consistently, ABI4 overexpressing seedlings have a lower GA/ABA ratio compared to the wild type. We further show that ABA induces GA2ox7 transcription while GA represses NCED6 expression in an ABI4-dependent manner; and that ABA stabilizes the ABI4 protein, whereas GA promotes its degradation. Taken together, these results propose that ABA and GA antagonize each other by oppositely acting on ABI4 transcript and protein levels
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