935 research outputs found
Adjustment of State Owned and Foreign-Funded Enterprises in China to Economic Reforms,1980s-2007: a logistic smooth transition regression (LSTR) approach
This paper applies a logistic smooth transition regression approach to the estimation of a homogenous aggregate value added production function of the State Owned (SOE) and Foreign-Funded Enterprises (FFE) in China, 1980s-2007. The transition associated with the economic reforms in China is estimated applying a curvilinear logistic function, where the speed and the timing of the transition are endogenously determined by the data. We find high but gradually declining markups in both SOEs and FFEs during the early stages of the adjustment, with SOEs having a much larger scale and market size than the FFEs. However, over the transition process, returns to scale in industrial SOEs dropped sharply. For both FFEs and SOEs the transition is slow, with a midpoint about 7 and 14 years, respectively. We find significant increase of TFP growth rate for both FFEs and SOEs, by 0.1436 and 0.1971, respectively.
Heavy Metals Transportation Between Sediment and Water Underdifferent Hydrodynamic Conditions
Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv
Anatomy of semileptonic decays
We present a systematic study of with and , examining all the
possible decay observables based on the homogeneous bag model (HBM) and lattice
QCD (LQCD). With the HBM, we find that the branching fractions and polarization
asymmetries of the daughter baryon are and , respectively. From
the LQCD, we obtain that . We also explore the
time-reversal asymmetries due to new physics beyond the standard model. All our
results are consistent with the current experimental data, while some of them
are accessible to the experiments at BESIII and Belle II.Comment: 22 pages, 13 figure
Conservation Tillage Influence on Topsoil Aggregation and Carbon Content on the Loess Plateau, China
Nature of in and decays
We investigate the decays of and
based on the picture where the resonance is strongly coupled to the
channel. In addition to the decay mechanism where the
resonance is formed from the pair hadronization with the
short-distance interaction, we have also considered the
rescattering diagrams in the long-distance scale, where and are
formed from and separately. Because of the difference of the mass
thresholds of charged and neutral channels, and the rather narrow
width of the resonance, at the mass, the loop functions of
and are much different. Taking this
difference into account, the ratio of can be naturally
obtained. Based on this result, we also evaluate the decay widths of . It is expected that future experimental measurements of
these decays can be used to elucidate the nature of the resonance.Comment: 7 pages, 5 figure
Intravascular large B-cell lymphoma of the kidney: A case report
We report a 41-year-old Chinese woman with intravascular large B-cell lymphoma diagnosed by percutaneous renal biopsy. The patient was admitted to Nanfang Hospital of Southern Medical University, Guangzhou, China with complaints of high spiking fever for a month and bilateral lower limb fatigue with difficulty ambulating for the past 5 months
VASPKIT: A User-friendly Interface Facilitating High-throughput Computing and Analysis Using VASP Code
We present the VASPKIT, a command-line program that aims at providing a
powerful and user-friendly interface to perform high-throughput analysis of a
variety of material properties from the raw data produced by the VASP code. It
consists of mainly the pre- and post-processing modules. The former module is
designed to prepare and manipulate input files such as the necessary input
files generation, symmetry analysis, supercell transformation, k-path
generation for a given crystal structure. The latter module is designed to
extract and analyze the raw data about elastic mechanics, electronic structure,
charge density, electrostatic potential, linear optical coefficients, wave
function plots in real space, and etc. This program can run conveniently in
either interactive user interface or command line mode. The command-line
options allow the user to perform high-throughput calculations together with
bash scripts. This article gives an overview of the program structure and
presents illustrative examples for some of its usages. The program can run on
Linux, MacOS, and Windows platforms. The executable versions of VASPKIT and the
related examples, together with the tutorials, are available in its official
website vaspkit.com.Comment: 33 pages, 19 figure
FERN: Leveraging Graph Attention Networks for Failure Evaluation and Robust Network Design
Robust network design, which aims to guarantee network availability under
various failure scenarios while optimizing performance/cost objectives, has
received significant attention. Existing approaches often rely on model-based
mixed-integer optimization that is hard to scale or employ deep learning to
solve specific engineering problems yet with limited generalizability. In this
paper, we show that failure evaluation provides a common kernel to improve the
tractability and scalability of existing solutions. By providing a neural
network function approximation of this common kernel using graph attention
networks, we develop a unified learning-based framework, FERN, for scalable
Failure Evaluation and Robust Network design. FERN represents rich problem
inputs as a graph and captures both local and global views by attentively
performing feature extraction from the graph. It enables a broad range of
robust network design problems, including robust network validation, network
upgrade optimization, and fault-tolerant traffic engineering that are discussed
in this paper, to be recasted with respect to the common kernel and thus
computed efficiently using neural networks and over a small set of critical
failure scenarios. Extensive experiments on real-world network topologies show
that FERN can efficiently and accurately identify key failure scenarios for
both OSPF and optimal routing scheme, and generalizes well to different
topologies and input traffic patterns. It can speed up multiple robust network
design problems by more than 80x, 200x, 10x, respectively with negligible
performance gap
Rare Gingival Metastasis by Hepatocellular Carcinoma
Hepatocellular carcinoma (HCC) uncommonly metastasizes to the gingiva, which always means a poor outcome. We reported a rare HCC case with multiple metastases to gingiva, lungs, and brain. A 60-year-old man was initially diagnosed as HCC with metastases to double lungs. He was subjected to a transarterial chemoembolization (TACE) (5-fluorouracil, 750 mg) and two cycles of intravenous chemotherapy (gemcitabine 1.8 g at days 1 and 8, oxaliplatin 200 mg at day 2, every 4 weeks). However, the volume of liver tumor still increased. A bean-size gingival nodule growing with occasional bleeding was also found. TACE (5-fluorouracil 750 mg, perarubicin 40 mg, cisplatin 20 mg) was performed again and an oral sorafenib therapy (400 mg, twice per day) was adopted. The disease maintained relatively stable for about 6 months until a second obvious progress. The gingival nodule was then palliatively excised and identified as a poorly differentiated metastatic HCC by histopathological examination. Best supportive treatments were made since the performance score was too bad. Finally, cerebral metastases occurred and the patient died of systemic failure. Upon review of previous reports, we discussed risk factors, clinical and pathological characteristics, treatments, and prognosis of gingival metastasis by HCC
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