1,243 research outputs found
Fabrication of multianalyte CeO2 nanograin electrolyte–insulator–semiconductor biosensors by using CF4 plasma treatment
Multianalyte CeO2 biosensors have been demonstrated to detect pH, glucose, and urine concentrations. To enhance the multianalyte sensing capability of these biosensors, CF4 plasma treatment was applied to create nanograin structures on the CeO2 membrane surface and thereby increase the contact surface area. Multiple material analyses indicated that crystallization or grainization caused by the incorporation of flourine atoms during plasma treatment might be related to the formation of the nanograins. Because of the changes in surface morphology and crystalline structures, the multianalyte sensing performance was considerably enhanced. Multianalyte CeO2 nanograin electrolyte–insulator–semiconductor biosensors exhibit potential for use in future biomedical sensing device applications
Design and Development of the Reactive BGP peering in Software-Defined Routing Exchanges
The Software-Defined Networking (SDN) is considered to be an improved solution for applying flexible control and operation recently in the network. Its characteristics include centralized management, global view, as well as fast adjustment and adaptation. Many experimental and research networks have already migrated to the SDN-enabled architecture. As the global network continues to grow in a fast pace, how to use SDN to improve the networking fields becomes a popular topic in research. One of the interesting topics is to enable routing exchanges among the SDN-enabled network and production networks. However, considering that many production networks are still operated on legacy architecture, the enabled SDN routing functionalities have to support hybrid mode in operation. In this paper, we propose a routing exchange mechanism by enabling reactive BGP peering actions among the SDN and legacy network components. The results of experiments show that our SDN controller is able to mask as an Autonomous System (AS) to exchange routing information with other BGP routers
Oxaliplatin-induced acquired long QT syndrome with torsades de pointes and myocardial injury in a patient with dilated cardiomyopathy and rectal cancer
AbstractA 67-year-old woman presented with a history of dilated cardiomyopathy with congestive heart failure since 2003, who subsequently developed lower rectal cancer (adenocarcinoma) with liver, bone, and lymph node metastasis. Abdominoperineal resection and hepatectomy were performed. The patient received two rounds of intravenous chemotherapy, including 12 and six courses of FOLFOX4 (5-fluorouracil, leucovorin, and oxaliplatin; 85 mg/m2 per cycle). She underwent a third round of intravenous FOLFOX4 because of tumor progression. During the 21st course of FOLFOX4 regimen, the patient developed ST segment depression in lead II and prolongation of QT interval with polymorphic ventricular tachycardia, torsades de pointes right after the start of oxaliplatin infusion. Immediate defibrillation and cardiopulmonary resuscitation were administered, and the patient regained spontaneous circulation and consciousness. Twelve-lead electrocardiogram showed ST segment elevation in III, aVF, and ST segment depression in V4–6 after resuscitation. To our knowledge, prolongation of QT interval with torsades de pointes and coronary spasm with myocardial injury that were stabilized in one patient following oxaliplatin infusion has not been reported. We present a patient with these rare complications
Learning Structural Kernels for Natural Language Processing
Structural kernels are a flexible learning
paradigm that has been widely used in Natural
Language Processing. However, the problem
of model selection in kernel-based methods
is usually overlooked. Previous approaches
mostly rely on setting default values for kernel
hyperparameters or using grid search,
which is slow and coarse-grained. In contrast,
Bayesian methods allow efficient model
selection by maximizing the evidence on the
training data through gradient-based methods.
In this paper we show how to perform this
in the context of structural kernels by using
Gaussian Processes. Experimental results on
tree kernels show that this procedure results
in better prediction performance compared to
hyperparameter optimization via grid search.
The framework proposed in this paper can be
adapted to other structures besides trees, e.g.,
strings and graphs, thereby extending the utility
of kernel-based methods
Towards Better Query Classification with Multi-Expert Knowledge Condensation in JD Ads Search
Search query classification, as an effective way to understand user intents,
is of great importance in real-world online ads systems. To ensure a lower
latency, a shallow model (e.g. FastText) is widely used for efficient online
inference. However, the representation ability of the FastText model is
insufficient, resulting in poor classification performance, especially on some
low-frequency queries and tailed categories. Using a deeper and more complex
model (e.g. BERT) is an effective solution, but it will cause a higher online
inference latency and more expensive computing costs. Thus, how to juggle both
inference efficiency and classification performance is obviously of great
practical importance. To overcome this challenge, in this paper, we propose
knowledge condensation (KC), a simple yet effective knowledge distillation
framework to boost the classification performance of the online FastText model
under strict low latency constraints. Specifically, we propose to train an
offline BERT model to retrieve more potentially relevant data. Benefiting from
its powerful semantic representation, more relevant labels not exposed in the
historical data will be added into the training set for better FastText model
training. Moreover, a novel distribution-diverse multi-expert learning strategy
is proposed to further improve the mining ability of relevant data. By training
multiple BERT models from different data distributions, it can respectively
perform better at high, middle, and low-frequency search queries. The model
ensemble from multi-distribution makes its retrieval ability more powerful. We
have deployed two versions of this framework in JD search, and both offline
experiments and online A/B testing from multiple datasets have validated the
effectiveness of the proposed approach
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