14,235 research outputs found
Measurement of dwell times of spin polarized rubidium atoms on octadecyltrichlorosilane- and paraffin-coated surfaces
No full textWe report the measurement of dwell times of spin polarized Rb atoms on octadecyltrichlorosilane OTS- and paraffin-coated surfaces. We find that at a cell temperature of 72 °C the dwell times for OTS- and paraffin-coated surfaces are 0.9+-0.1 microsecond and 1.8 +-0.2 microsecond , respectively. Since the relaxation probability on paraffin is almost one order of magnitude smaller than that on OTS, the longer dwell time for paraffin indicates that the average strength of the interactions experienced by Rb atoms while they are inside paraffin is much weaker than while they are inside OTS.Peer reviewe
Review of the genus<i>Helcystogramma</i>Zeller (Lepidoptera: Gelechiidae: Dichomeridinae) from China
No full textLi, H.H., Zhen, H. (2011): Review of the genus Helcystogramma Zeller (Lepidoptera: Gelechiidae: Dichomeridinae) from China. Journal of Natural History 45 (17-18): 1035-1087, DOI: 10.1080/00222933.2011.552798, URL: http://dx.doi.org/10.1080/00222933.2011.55279
Pyrocoelia rubrothorax Zhu & Xu & Zhen 2022, sp. nov.
No full textPyrocoelia rubrothorax Zhu & Zhen, sp. nov. (Figs. 2, 4, 7, 8) Description. Male (Figs. 2, 4): BL 18.2–19.5 mm; BW 8.5–9.2 mm; EL/EW 1.67–1.88; EL/PL=3.92–4.28 (five individuals). Head. Antenna black, thick and serrate, almost 1/2 as long as body length; first antennomere cone-shaped; second short and cylindrical; third to tenth compressed, with obvious branches originating from inner side; eleventh almost 1.5 times as long as the tenth antennomere, slightly dilated from base to apex; antennal sockets broadly separated from each other. Eyes small, moderately separated above the labrum, weakly oviform laterally. Clypeus and labrum fused together and elongate oval. Mandibles shorter than clypeus and labrum. Thorax. Pronotum orange in reddish, prosternum and metasternum, hypomera bright orange, with two little transparent cavities; pronotum semi-elliptical; margins of apical and lateral slightly elevated; longitudinal carina distinct. Scutellum ligulate and covered with orange hairs. Elytra in blackish, elongated, subparallel and broadest in apical 2/3. Legs long and thick in blackish, femur orange but rest of the parts in blackish. Abdomen. Orange in reddish, abdominal terga shorter than elytra; gradually smaller from basal to apical segments, terga wide, with lobate expansion on both sides, apical blunt. Light organ in bright orange (Fig. 4), on the sixth ventrite; seventh ventrite emarginate. Abdominal spiracles on lateral edges of each abdominal segment. Male genitalia. (Figs. 7–8) Aedeagal sheath (Fig. 8a–b) about 2.7 mm long. tergite of the sheath (TS) subtrapezoidal, with base broadly rounded. Aedeagus (Fig. 7a–c) about 2.2 mm long, trilobate. Phallus thumb-like, thick and straight, then elliptically expanding, a little shorter than parameres. Parameres robust in basal 1/2, subparallelsided, becoming narrower towards apical; apical arm thumb-like, about 1/3 length of parameres. Diagnosis. Body elongated, depressed dorsally, antenna serrate, second antennomere short and cylindrical, elytra subparallel. Pyrocoelia rubrothorax sp. nov. resembles P. praetexta Olivier, 1911 from Taiwan, but the elytral edge and elytral flange of P. rubrothorax is black, whereas that of P. praetexta is orange. In comparison with P. praetexta, P. rubrothorax has a more developed male phallus and much straighter parameres. Pyrocoelia rubrothorax also similar to P. sanguiniventer Olivier, 1911, known from Taiwan and Hong Kong, but can be distinguished by the following characters: the pronotum margin of P. sanguiniventer is black but reddish in P. rubrothorax; the color of the metasternum in P. sanguiniventer is black but reddish in P. cenwanglaoensis. Etymology. The specific name rubrothorax (Chinese name: İḆḛff) refers to the reddish pronotum of the species. Holotype: CHINA: 1♂, labeled: ‘ China: Guangxi, Baise County, Mt. Cenwanglaoshan, 24°29'42″N, 106°24'28″E, H: 1300 m, 10. XI. 2019, Local People leg. ’;‘ HOLOTYPE (red), ♂, Pyrocoelia rubrothorax sp. n., det. Zhu, Zhen, 2020’ (Westlake University). Paratype: CHINA: 5♂♂, labeled: ‘ China: Guangxi, Baise County, Mt. Cenwanglaoshan, 24°29'42″N, 106°24'28″E, H: 1300 m, 10. XI. 2019, Local People leg. ’; ‘ PARATYPE (yellow), 5♂♂, Pyrocoelia rubrothorax sp. n., det. Zhu, Zhen, 2020’ (Westlake University). Distribution. China: Guangxi Province.Published as part of Zhu, Chengqi, Xu, Xiaodong & Zhen, Ying, 2022, Two new species of Pyrocoelia Gorham (Coleoptera: Lampyridae) from Southwest China, pp. 173-182 in Zootaxa 5162 (2) on page 177, DOI: 10.11646/zootaxa.5162.2.6, http://zenodo.org/record/680998
China, General Wang Zhen and Wu Man-yu in Yan'an
No full textCaption from Report from Red China and Xi xing man ying: On the left, Wu Man-yu, Labour Hero Number One of the Border Regions, with General Wang Cheng [Wang Zhen], youthful Commander of the famous 359th Brigade.China: Yanan [Yan'an]Forman, H. (1946). Report from Red China. London: Robert Hale Limited.; Forman, H. (1946). Xi xing man ying. Shanghai: Shanghai shu bao gong si.GrayscaleForman Nitrate Negatives, Box 1
Design of a robust H∞ repetitive control system with time-delay
No full textThis paper investigates the problem of designing a robust H ∞ repetitive control system with periodic time-delay. Firstly, a continuous-discrete two-dimensional (2D) model with time-delay is constructed to describe the control and learning actions of the system. Then, by choosing an appropriate Lyapunov functional, LMI-based sufficient stability conditions for asymptotic stability and satisfactory H∞ tracking performance of the 2D model is derived. Finally, a numerical example is given to illustrate the effectiveness of the proposed method. © 2014 IEEE
Dong zhen lie biao mian deng li zi gong zhen sheng wu chuan gan qi zhi liang zhi biao ji lu he wei fen xiang bian ji shu
No full textWong, Sze Lung = 洞陣列表面等離子共振生物傳感器質量指標記錄和微分相變技術 / 黃思龍.Thesis M.Phil. Chinese University of Hong Kong 2013.Includes bibliographical references (leaves 86-94).Abstracts also in Chinese.Title from PDF title page (viewed on 27, September, 2016).Wong, Sze Lung = Dong zhen lie biao mian deng li zi gong zhen sheng wu chuan gan qi zhi liang zhi biao ji lu he wei fen xiang bian ji shu / Huang Silong
Zai er wei jin shu na mi dong zhen lie shang biao mian deng li zi ji yuan dao zhi de pian zhen zhuan huan
No full textYiu, Lai Yin = 在二維金屬納米洞陣列上表面等離子激元導致的偏振轉換 / 姚勵賢.Thesis M.Phil. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 90-96).Abstracts also in Chinese.Title from PDF title page (viewed on 15, December, 2016).Yiu, Lai Yin = Zai er wei jin shu na mi dong zhen lie shang biao mian deng li zi ji yuan dao zhi de pian zhen zhuan huan / Yao Lixian
Yan'an (China), General Wang Zhen and Wu Man-yu
No full textChina: Yenan [Yan'an], garden party dinnerSimilar photograph published in Harrison Forman's book Report from Red China with caption: On the left, Wu man-yu, Labour Hero Number One of the Border Region, with General Wang Cheng [Zhen], youthful Commander of the famous 359th Brigade.Forman, H. (1946). Report from Red China. London: Robert Hale Limited.GrayscaleForman Nitrate Negatives, Box 2
Bayesian Unsupervised Batch and Online Speaker Adaptation of Activation Function Parameters in Deep Models for Automatic Speech Recognition
No full textWe present a Bayesian framework to obtain maximum a posteriori (MAP) estimation of a small set of hidden activation function parameters in CD-DNN-HMM based automatic speech recognition (ASR) systems. When applied to speaker adaptation, we aim at transfer learning from a well-trained deep model for a “general” usage to a “personalized” model geared towards a particular talker using a collection of speakerspecific data. To make the framework applicable to practical situations, we perform adaptation in an unsupervised manner assuming the transcriptions of the adaptation utterances are not readily available to the ASR system. We conduct a series of comprehensive batch adaptation experiments on the Switchboard ASR task and show that the proposed approach is effective even with CD-DNN-HMM built with discriminative sequential training. Indeed, MAP speaker adaptation reduces the word error rate (WER) to 20.1% from an initial 21.9% on the full NIST 2000 Hub5 benchmark test set. Moreover, MAP speaker adaptation compares favourably with other techniques evaluated on the same speech tasks. We also demonstrate its complementarity to other approaches by applying MAP adaptation to CD-DNNHMM trained with speaker adaptive features generated through constrained maximum likelihood linear regression (fMLLR) and further reduces the WER to 18.6%. Leveraging upon the intrinsic recursive nature in Bayesian adaptation and mitigating possible system constraints on batch learning, we also proposed an incremental approach to unsupervised online speaker adaptation by simultaneously updating the hyperparameters of the approximate posterior densities and the DNN parameters sequentially. The advantage of such a sequential learning algorithm over a batch method is not necessarily in the final performance, but in computational efficiency and reduced storage needs, without having to wait for all the data to be processed. So far the experimental results are promising
Mystical symbolism and dialetheist congnitivism: the transformation of truth-falsehood (Zhen-Jia)
No full textOne of the central philosophical issues is the problem of Truth-Falsehood (Zhen-Jia) in A Dream of Red Mansions. We may find three positions in this book: The first is “Truth” (Zhen) which also means “Being,” “Reality,” “Existence,” “Physical and Materialistic Substance,” and “Actual Social affairs”; the second is “Falsehood” (Jia) which means “Non-Being,” “Emptiness,” “Nothingness,” “Nihility,” “Illusory Fiction,” and “Spiritual and Mental Activities;” and the third is “Truth-Falsehood” (Zhen-Jia). The third can be considered “Transformation of Truth and Falsehood,” which has the following four attributes in this book: 1) Unification of truth and falsehood; 2) Interrelation of truth and falsehood; 3) Interaction of truth and falsehood; 4) Inter-substitution of truth and falsehood. The transformation of Truth-Falsehood (Zhen-Jia) in this book can be considered a sort of spiritual transformation which is recognized within the context of an individual self-consciousness, or an individual's meaning system, especially in relation to the concepts of the sacred or ultimate concern. In this article, the author will discuss this theme by explaining and examining the relationship and transformation of “Truth” and “falsehood” through the following three perspectives: traditional Chinese glyphomancy, dialetheism and fatalism.Ding, J. Z. (2012). Mystical symbolism and dialetheist congnitivism: the transformation of truth-falsehood (Zhen-Jia). Journal of East-West Thought, 2(2), 119-134
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