6,253 research outputs found
Multipartite entanglement purification with quantum nondemolition detectors
We present a scheme for multipartite entanglement purification of quantum
systems in a Greenberger-Horne-Zeilinger state with quantum nondemolition
detectors (QNDs). This scheme does not require the controlled-not gates which
cannot be implemented perfectly with linear optical elements at present, but
QNDs based on cross-Kerr nonlinearities. It works with two steps, i.e., the
bit-flipping error correction and the phase-flipping error correction. These
two steps can be iterated perfectly with parity checks and simple single-photon
measurements. This scheme does not require the parties to possess sophisticated
single photon detectors. These features maybe make this scheme more efficient
and feasible than others in practical applications.Comment: 8 pages, 5 figure
初期特发性脊柱侧弯患者的补硒膳食指导
The study found that there was a correlation between trace element Se and idiopathic scoliosis, and selenium deficiency was probably one of the precipitating factor. According to Chinese dietary reference intakes and selenium content in different food, the plan for filling selenium is conducted, the dietary guidance of filing selenium for incipient idiopathic scoliotic patients is provided, and the disease development is observed so that the basis for etiology and prevention of idiopathic scoliosis can be provided.研究发现微量元素硒与特发性脊柱侧弯具有相关性,硒缺乏可能是诱发因素之一。根据中国居民膳食营养素参考摄入量和不同食物中硒含量制定补硒方案,为初期特发性脊柱侧弯患者提供补硒的膳食指导,观察特发性脊柱侧弯畸形进展情况,为特发性脊柱侧弯的病因学研究和疾病预防提供依据
Scaling Behavior and Variable Hopping Conductivity in the Quantum Hall Plateau Transition
We have measured the temperature dependence of the longitudinal resistivity
of a two-dimensional electron system in the regime of the quantum
Hall plateau transition. We extracted the quantitative form of scaling function
for and compared it with the results of ordinary scaling theory and
variable range hopping based theory. We find that the two alternative
theoretically proposed scaling functions are valid in different regions.Comment: 4 pages, 4 figure
A Systematic Evaluation of Feature Selection and Classification Algorithms Using Simulated and Real miRNA Sequencing Data
Sequencing is widely used to discover associations between microRNAs (miRNAs) and diseases. However, the negative binomial distribution (NB) and high dimensionality of data obtained using sequencing can lead to low-power results and low reproducibility. Several statistical learning algorithms have been proposed to address sequencing data, and although evaluation of these methods is essential, such studies are relatively rare. The performance of seven feature selection (FS) algorithms, including baySeq, DESeq, edgeR, the rank sum test, lasso, particle swarm optimistic decision tree, and random forest (RF), was compared by simulation under different conditions based on the difference of the mean, the dispersion parameter of the NB, and the signal to noise ratio. Real data were used to evaluate the performance of RF, logistic regression, and support vector machine. Based on the simulation and real data, we discuss the behaviour of the FS and classification algorithms. The Apriori algorithm identified frequent item sets (mir-133a, mir-133b, mir-183, mir-937, and mir-96) from among the deregulated miRNAs of six datasets from The Cancer Genomics Atlas. Taking these findings altogether and considering computational memory requirements, we propose a strategy that combines edgeR and DESeq for large sample sizes
PromptTTS: Controllable Text-to-Speech with Text Descriptions
Using a text description as prompt to guide the generation of text or images
(e.g., GPT-3 or DALLE-2) has drawn wide attention recently. Beyond text and
image generation, in this work, we explore the possibility of utilizing text
descriptions to guide speech synthesis. Thus, we develop a text-to-speech (TTS)
system (dubbed as PromptTTS) that takes a prompt with both style and content
descriptions as input to synthesize the corresponding speech. Specifically,
PromptTTS consists of a style encoder and a content encoder to extract the
corresponding representations from the prompt, and a speech decoder to
synthesize speech according to the extracted style and content representations.
Compared with previous works in controllable TTS that require users to have
acoustic knowledge to understand style factors such as prosody and pitch,
PromptTTS is more user-friendly since text descriptions are a more natural way
to express speech style (e.g., ''A lady whispers to her friend slowly''). Given
that there is no TTS dataset with prompts, to benchmark the task of PromptTTS,
we construct and release a dataset containing prompts with style and content
information and the corresponding speech. Experiments show that PromptTTS can
generate speech with precise style control and high speech quality. Audio
samples and our dataset are publicly available.Comment: Submitted to ICASSP 202
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