11 results on '"Yang, Yunqi"'
Search Results
2. The High-Efficiency Optimization Design Method for Two-Stage Miller Compensated Operational Amplifier
- Author
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Yang, Yunqi, Yin, Xiaoyu, Chen, Dongdong, Li, Di, and Yang, Yintang
- Abstract
In this brief, a high-efficiency optimization design method is proposed for a two-stage Miller-compensated operational amplifier (TSMCOA). In the proposed method, the parameters and performance metrics of TSMCOA are simulated by Cadence software. Then, the neural network (NN) models are utilized to describe the relationship between its parameters and performance metrics, which can greatly improve simulation efficiency. Based on the performance metrics of TSMCOA, a multi-objective function is established. Then, according to the NN models and multi-objective function, the parameters of TSMCOA are optimized by particle swarm optimization algorithm with linearly decreasing inertia weight (PSO-LDIW). The optimized area is
$0.1371 \mu $ $72.09 \mu $ - Published
- 2024
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3. A 50Gb/s CMOS Optical Receiver With Si-Photonics PD for High-Speed Low-Latency Chiplet I/O
- Author
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Chen, Sikai, You, Mingyang, Yang, Yunqi, Jin, Ye, Lin, Ziyi, Li, Yihong, Li, Leliang, Li, Guike, Xie, Yujun, Zhang, Zhao, Wang, Binhao, Tang, Ningfeng, Liu, Faju, Fang, Zheyu, Liu, Jian, Wu, Nanjian, Chen, Yong, Liu, Liyuan, Zhu, Ninghua, Li, Ming, and Qi, Nan
- Abstract
This paper presents a 50-Gb/s optical receiver (ORX) chipset, consisting of a transimpedance amplifier (TIA) and a clock and data recovery (CDR) circuit in a 45-nm silicon-on-insulator CMOS. The proposed inverter-based TIA employs hybrid shunt-series peaking inductors to extend the bandwidth (BW). A baud-rate CDR is proposed to reduce the sampling phases and clocking power by half. To optimise the ORX for in- package integration, a compact-size digital loop is adopted in each channel, and the clock is recovered by phase interpolation from a shared reference. A complete optical-to-electrical (OE) link is built by integrating the proposed ORX with a high-speed Silicon Photonics (SiP) photodetector (PD). Measurements show that the proposed TIA has a transimpedance gain of 53 dB
$\Omega $ $ < 10^{-12}$ - Published
- 2023
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4. The impact of phone use on energy poverty: Evidence from Tibet, China.
- Author
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Zang, Dungang, Yang, Yunqi, Hu, Zhijia, He, Jianfeng, and He, Siyu
- Subjects
ENERGY consumption ,POVERTY ,HIGH technology industries ,RURAL poor ,CONSUMPTION (Economics) ,CELL phones - Abstract
The main contradictions in Chinese society have changed as China enters a new era, and the people's pursuit of the better life has become more intense. This study explores how energy poverty can be addressed from a digital perspective in the context of the booming digital economy. This study analyzed the impact of mobile phone use on energy poverty by constructing an OLS model using micro data from Tibetan farming and pastoral areas. We also conduct tests for endogeneity, robustness, heterogeneity, and influence mechanisms. The results indicate that mobile phone use has a significant negative impact on energy poverty, and the results remain robust after instrumental-variable regression. In terms of economic utility, mobile phone use reduces energy poverty by increasing household consumption or off-farm income. In terms of social utility, mobile phone use can also alleviate energy poverty by raising social capital. Heterogeneity analysis shows that mobile phone use contributes to energy poverty alleviation in a way that benefits the poor and the less educated. The authors investigate the impact of mobile phone use on Energy Poverty, a topic that has previously been little addressed in academia. The findings of this paper enrich the literature on the digital technology and energy poverty and provide a new perspective for alleviating energy poverty in rural areas and improving farmers' well-being. Finally, this paper offers some policy recommendations. • The use of mobile phones by farmers and herdsmen can alleviate energy poverty. • mobile phone use contributes to energy poverty alleviation in ways that benefit the poor and the less educated. • The social and economic utility brought by the use of mobile phones can help farmers and herdsmen alleviate energy poverty. [ABSTRACT FROM AUTHOR]
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- 2023
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5. Material flow analysis of discarded refrigerators from households in urban and rural areas of China.
- Author
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Li, Xin, Ren, Qiang, You, Xiaoling, Yang, Yunqi, Shan, Mingwei, and Wang, Minxi
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ELECTRONIC waste ,METAL content of water ,CITIES & towns ,RURAL geography ,MATERIALS analysis ,WEIBULL distribution ,ELECTRONICS recycling - Abstract
• Generation amount of substance in obsolete refrigerators in China from 1990 to 2035. • Possession and scrap of refrigerators will reach 500.3 and 45 million units in 2035. • Forecasting recycling potential of refrigerators from households in urban and rural. • Focusing on recycling and reusing of more and more obsolete refrigerators in rural. • Developing a bottom-up and stock-driven model to study the future e-waste generation. Waste electrical and electronic equipment (WEEE) is one of the fastest growing waste streams in China. How to quantify and systematically analyze the flow and materials is a problem. This paper provides a basis for managing refrigerators at both product and substance levels through developed dynamic material flow analysis model, bottom-up (refrigerators grouped by material modules), stock-driven combined with Weibull distribution function and refrigerator life cycle to predict the number of metals and plastics contained in obsolete refrigerators. We found that: ① A gradual increase of obsolete refrigerators from 1990 to 2035. The total possession of refrigerators is from 417.6 million units in 2016 to 500.3 million units in 2035, with an average annual growth rate for the value 19.8%/20 (years). The total number of obsolete refrigerators is from 28.5 million units in 2016 to 45 million units in 2035, with an average annual growth rate for the value 57.9%/20 (years); ② the possession of refrigerators of urban is higher than the rural areas from 1990 to 2016, but the possession of refrigerators of urban and rural will be convergence in 2035; ③ These growing obsolete refrigerators would mean there are potentially numerous recyclable materials. Such as most precious metals (i.e., Au, Ag), common metals (i.e., Fe, Al, Cu, Sn), toxic metals (i.e., Pb, Sb, Cd, Hg), plastics and gas will reach 0.0072 Gg , 1636.1 Gg , 0.2776 Gg , 930.1 Gg and 29.2 Gg in 2035, respectively. Because of a huge gap on the possession level of e-waste between urban and rural areas in China, this paper recommends that future national policies should focus on recycling and reusing of refrigerators in urban while also focusing on the increasing number of obsolete refrigerators in rural areas. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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6. Concentrically Integrative Bioassembly of a Three-Dimensional Black Phosphorus Nanoscaffold for Restoring Neurogenesis, Angiogenesis, and Immune Homeostasis
- Author
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Qian, Yun, Yuan, Wei-En, Cheng, Yuan, Yang, Yunqi, Qu, Xinhua, and Fan, Cunyi
- Abstract
Black phosphorus is well known for its excellent electromechanical properties. Although it has previously been used for therapeutic drug delivery in cancer, it has never been applied as an electroactive polymer for post-trauma tissue regeneration (e.g., in cardiac muscles and neurons). The major concern currently preventing such applications is its controversial biosafety profile in vivo. Here, we demonstrate the production of a concentrically integrative layer-by-layer bioassembled black phosphorus nanoscaffold. This scaffold has remarkable electrical conductivity, permitting smooth release into the surrounding microenvironment. We confirmed that, under mild oxidative stress, our black phosphorus nanoscaffold induced angiogenesis and neurogenesis and stimulated calcium-dependent axon regrowth and remyelination. Long-term in vivo implantation of this nanoscaffold during severe neurological defect regeneration induced negligible toxicity levels. These results provide new insight into the regenerative capability of manufactured 3D scaffolds using neuroengineered 2D black phosphorus nanomaterials.
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- 2019
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7. Dynamic analysis of copper consumption, in-use stocks and scrap generation in different sectors in the U.S. 1900–2016.
- Author
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Wang, Minxi, Liang, Yanan, Yuan, Miao, Cui, Xiandan, Li, Xin, and Yang, Yunqi
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COPPER ,SCRAP materials ,WASTE recycling ,NATURAL resources management ,CONSUMPTION (Economics) - Abstract
Highlights • The flow and stocks of copper were analyzed in the U.S. 1900–2016. • The amount of copper scrap generation and in-use stocks were estimated. • Only a small portion of old scrap was recycled for domestic consumption. • Several recycling indicators were analyzed and discussed. Abstract More and more attention is paid to application of material flow accounting for the sustainability of resource management. This paper evaluates the dynamics stocks and flows associated with the U.S. copper industry based on historical data of copper consumption during1900–2016. This paper shows the current in-use stocks and predicts the amount of scrap generation until 2031 of different consumption scenarios. During1900–2016, about 60% of consumed copper transformed to scrap, the rest still existed in in-use stocks. The change of copper consumption during 2016–2031 has little effect on the amount of scrap generation in 2031. For sectors, building construction is the largest consumer of copper, with an average of 37% of total consumption. But scrap generated from building construction is only 16,800 Gg, far less than the 33,900 Gg generated from electric and electronic products. This is due to the generally long-life expectancy of building construction. Besides, the maximum amount of in-use stocks is 74,400 Gg in the calculation period, 67% (about 49,700 Gg) of which is from building construction. Several recycling indicators defined from different perspectives also have been measured. All recycling indicators in the U.S. are higher than the global average. However, compared to the considerable amount of scrap generation, recycled copper for domestic consumption is very small, only accounting for 8.1% in the past decades. This is because of large amount of export scrap and high recovery costs. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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8. Clinical implications of conflicting variant interpretations in the cancer genetics clinic
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Zukin, Elyssa, Culver, Julie O., Liu, Yuxi, Yang, Yunqi, Ricker, Charité N., Hodan, Rachel, Sturgeon, Duveen, Kingham, Kerry, Chun, Nicolette M., Rowe-Teeter, Courtney, Singh, Kathryn, Zell, Jason A., Ladabaum, Uri, McDonnell, Kevin J., Ford, James M., Parmigiani, Giovanni, Braun, Danielle, Kurian, Allison W., Gruber, Stephen B., and Idos, Gregory E.
- Abstract
The aim of this study was to describe the clinical impact of commercial laboratories issuing conflicting classifications of genetic variants.
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- 2023
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9. Enzymatic Synthesis of Aptamer-Polynucleotide Nanoparticles with High Anticancer Drug Loading for Targeted Delivery
- Author
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Deshpande, Sonal, Yang, Yunqi, Zauscher, Stefan, and Chilkoti, Ashutosh
- Abstract
We report a targeted prodrug delivery platform that can deliver a cytostatic nucleobase analog with high drug loading. We chose fluorouracil (5FU), a drug used to treat various cancers, whose active metabolite 5-fluorodeoxyuridine monophosphate (5-FdUMP) is the antineoplastic agent. We use terminal deoxynucleotidyl transferase (TdT) to polymerize 5-fluorodeoxyuridine triphosphate (5-FdUTP) onto the 3′-end of an aptamer. We find that (i) addition of hydrophobic, unnatural nucleotides at the 3′-end of the 5-FdU polynucleotide by TdT leads to their spontaneous self-assembly into nuclease resistant micelles, (ii) aptamers presented on the micelle corona retain specificity for their cognate receptor on tumor cells, and (iii) the micelles deliver 5FU to tumor cells and exhibit greater cytotoxicity than the free drug. The modular design of our platform, consisting of a targeting moiety, a polynucleotide drug, and a self-assembly domain, can be adapted to encompass a range of polymerizable therapeutic nucleotides and targeting units.
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- 2023
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10. Multifunctional biomimetic hydrogel based on graphene nanoparticles and sodium alginate for peripheral nerve injury therapy
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Jin, Yi, Zhang, Wenkai, Zhang, Yihui, Yang, Yunqi, Fang, Zhiwei, Song, Jialin, Qian, Yun, and Yuan, Wei-En
- Abstract
Peripheral nerve injury (PNI) caused by injury may influence the patients' lifelong mobility unless there is an appropriate treatment. Tissue engineering has become a hot field to replace traditional autologous nerve transplantation due to its low surgical damage and easy-to-industrial advantages. Graphene (GR) is a kind of carbon nanomaterial with good electrical and mechanical properties that satisfy the demand for a good tissue scaffold for nerve regeneration. Herein, a novel and biosafe hydrogel is fabricated by using graphene and sodium alginate (GR-SA) together. This hydrogel not only can mimic the nerve growth microenvironment but also can promote the expression of neurotrophic substances and growth factors. Additionally, GR-SA hydrogel can significantly reduce inflammatory factors. Moreover, the results of both in vitro and in vivo tests demonstrate that GR-SA hydrogel has a promising prospect in PNI regeneration.
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- 2022
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11. Anti-Inflammatory and Gastroprotective Effects of Escin
- Author
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Yang, Yunqi, Wang, Linlin, Yuan, Man, Yu, Qi, and Fu, Fenghua
- Abstract
Escin is a triterpenoid saponin extracted from the fruit of Aesculus wilsoniiRehd. and Aesculus hippocastanum(Hippocastanaceae). Clinically, it is widely used in the treatment of edema induced by either trauma or surgery, as well as treating chronic venous insufficiency. The anti-inflammatory and antiedema effects of escin have been extensively investigated. This article systematically reviews the effects of escin on inflammation and gastrointestinal diseases, including its role in inflammation, as an antioxidant, and in inhibiting gastric acid secretion and promoting gastrointestinal movement, especially, the molecular mechanism. The advantages and potential uses of escin have also been discussed.
- Published
- 2020
- Full Text
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