The Research of the Oil Drilling Materials Information Management System Based on RFID

Bai Kai,Xia Hong-Nan,Jin Guo-Xing,Wang Hua-Bing 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.10

In the present drilling materials supplies management informationization level is low, which lead to low efficiency of management in the Chinese oil enterprises. This paper presents an effective solution combined with RFID and web technology for oil enterprise information service platform system, and studies several key technologies in the design. The system has taken the advantages of RFID and web services in the practical application process, the enterprises can use this RFID solution to enhance the logistics management efficiency in the oil-drilling materials supplies. At the end of the paper we proposed technical barriers is one of the reasons for RFID popularization.

Improving Retirement Coverage Durability with Target Volatility Strategy for Changing Interest Rate Environment

Bai Zefeng,Steblovskaya Victoria,Wallbaum Kai 한국증권학회 2023 Asia-Pacific Journal of Financial Studies Vol.52 No.6

Motivated by the recent market turbulence triggered by the COVID‐19 pandemic and the changing interest rate environment, we propose an improved investment strategy for extending retirement coverage in the pension decumulation stage. The newly proposed strategy with interest rate dependent volatility targets can significantly improve the durability of conventional retirement portfolios with constant risky and risk‐free asset allocations. This conclusion follows from our analysis in the simulated financial market with stochastic interest rate and stochastic volatility, based on the Hybrid Heston‐Vasicek model. Consequently, the proposed target volatility strategy could be a suitable option for more reliable retirement coverage after retirement.

Preparation and Performance Study of COS/PEI@PolyI:C/OVA Nanocomposite Using the Blend System of Chitooligosaccharide and Polyethyleneimine as a Drug Carrier

Kai Zhang,Qian Sun,Xiaoyu Bai,Peng Liu,Zijian Lyu,Qiuhong Li,Aixiang Li 한국고분자학회 2021 Macromolecular Research Vol.29 No.11

The blending system of chitooligosaccharide (COS) and polyethyleneimine (PEI) was studied as a drug carrier for tumor treatment. Nanoparticles COS/ PEI-PolyI:C-OVA-x (CP-P-O-x) (x=1, 2, 3) were prepared by electrostatic self-assembly of COS and PEI with the immune enhancing drug PolyI:C and the mimic antigen ovalbumin (OVA) using different feeding methods. The results showed that the nanoparticle solution could be stable only when the concentration of the added PEI was above 5.0% w/w. PolyI:C could be coated well and protected from nuclease degradation. The OVA encapsulation efficiency was above 75%. The results of cell viability experiments showed that the blend of COS and PEI had low cytotoxicity. The CP-P-O-1 had a suitable particle size, which was easy to be absorbed and expressed by cells. The results of in vitro immunization showed that due to the addition of PolyI:C, whether OVA was loaded on the inside or on the surface, nanoparticles significantly promoted the secretion of cytokines mouse tumor necrosis factor α (TNF-α) and mouse interferon-γ (IFN-γ). The feeding method mainly had a greater impact on the morphology and size of the nanoparticles, and had little effect on solution stability, OVA encapsulation efficiency, binding ability with PolyI:C, resistance to nuclease degradation and immune performance. CP-P-O-x prepared by the blend system of COS and PEI will be a potential candidate for tumor treatment.

EFFECT OF THE STRUCTURE OF ISOMERS OF MERCAPTOVALERIC ACID ON OPTICAL PROPERTIES OF CdTe QUANTUM DOTS

KAI-GUO MA,JIN-YI BAI,TAN FANG,Haiqing Guo 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.5

4-Mercaptovaleric acid (4MVA) and 3-mercaptovaleric acid (3MVA), two branched isomers of 5-mercaptovaleric acid (MVA), were designed and synthesized. They were used as capping agents in the aqueous synthesis of CdTe quantum dots (QDs) by a modified hydrothermal method with sodium tellurite as Te source. Compared with MVA-CdTe, either 4MVA-QDs or 3MVA-QDs exhibited higher fluorescent quantum yield (QY) and sharper absorption peak, which confirmed the superiority of using branched mercapto acids in the aqueous synthesis of QDs for improved optical properties. The fluorescence of QDs capped with 4MVA was higher than that of QDs capped with 4-mercaptobutyric acid (MBA) but lower than that of QDs capped with 3-mercaptobutyric acid (3MBA), which further confirmed the advantage of designing methyl side group rather than methylene group in the main chain for desired optical properties. However, the lower fluorescence, less sharp absorption peak and faster growth rate of 3MVA-QDs than that of 3MBA-QDs indicated adverse effect of side group on the aqueous synthesis of QDs if the size of side group is very bulky. Our results are helpful for selecting and designing appropriate capping agents for QDs with excellent properties.

PIAS: Practical Information-Agnostic Flow Scheduling for Commodity Data Centers

Bai, Wei,Chen, Li,Chen, Kai,Han, Dongsu,Tian, Chen,Wang, Hao IEEE 2017 IEEE/ACM transactions on networking Vol.25 No.4

<P>Many existing data center network (DCN) flow scheduling schemes, that minimize flow completion times (FCT) assume prior knowledge of flows and custom switch functions, making them superior in performance but hard to implement in practice. By contrast, we seek to minimize FCT with no prior knowledge and existing commodity switch hardware. To this end, we present PIAS, a DCN flow scheduling mechanism that aims to minimize FCT by mimicking shortest job first (SJF) on the premise that flow size is not known a priori. At its heart, PIAS leverages multiple priority queues available in existing commodity switches to implement a multiple level feedback queue, in which a PIAS flow is gradually demoted from higher-priority queues to lower-priority queues based on the number of bytes it has sent. As a result, short flows are likely to be finished in the first few high-priority queues and thus be prioritized over long flows in general, which enables PIAS to emulate SJF without knowing flow sizes beforehand. We have implemented a PIAS prototype and evaluated PIAS through both testbed experiments and ns-2 simulations. We show that PIAS is readily deployable with commodity switches and backward compatible with legacy TCP/IP stacks. Our evaluation results show that PIAS significantly outperforms existing information-agnostic schemes, for example, it reduces FCT by up to 50% compared to DCTCP [11] and L2DCT [32]; and it only has a 1.1% performance gap to an ideal information-aware scheme, pFabric [13], for short flows under a production DCN workload.</P>

Optimizing Pension Outcomes Using Target-Driven Investment Strategies: Evidence from Three Asian Countries with the Highest Old-Age Dependency Ratio

Zefeng Bai,Kai Wallbaum 한국증권학회 2020 Asia-Pacific Journal of Financial Studies Vol.49 No.4

As a response to unforeseeable market turbulence—such as the 2008 financial crisis and the most recent market drawdown triggered by the COVID-19 pandemic—we propose a new pension investment strategy that could better protect a long-term pension plan in volatile market conditions. Over a hypothetical 20-year pension scheme and various target volatility scenarios, we show that our newly proposed strategy, which attaches a target volatility mechanism to a lifecycle strategy, could provide more effective capital protection and risk control for pension investment vehicles. Our results are robust with a consideration of transaction costs.

Pituitary Adenoma Biomarkers Identified Using Proteomic Fingerprint Technology

Zhou, Kai-Yu,Jin, Hang-Huang,Bai, Zhi-Qiang,Liu, Chi-Bo Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8

Objective: To determine whether pituitary adenomas can be diagnosed by identifying protein biomarkers in the serum. Methods: We compared serum proteins from 65 pituitary adenoma patients and 90 healthy donors using proteomic fingerprint technology combining magnetic beads with matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS). Results: A total of 42 M/Z peaks were identified as related to pituitary adenoma (P<0.01). A diagnostic model established based on three biomarkers (3382.0, 4601.9, 9191.2) showed that the sensitivity of diagnosing pituitary adenoma was 90.0% and the specificity was 88.3%. The model was further tested by blind analysis showing that the sensitivity was 88.0% and the specificity was 83.3%. Conclusions: These results suggest that proteomic fingerprint technology can be used to identify pituitary adenoma biomarkers and the model based on three biomarkers (3382.0, 4601.9, 9191.2) provides a powerful and reliable method for diagnosing pituitary adenoma.

tae-miR9674a, a microRNA member of wheat, confers plant drought and salt tolerance through modulating the stomata movement and ROS homeostasis

Wang Ling,Bai Xinyang,Qiao Yuanjinzi,Si Lili,Yu Zidi,Ni Chenyang,Li Tianjiao,Guo Chengjin,Xiao Kai 한국식물생명공학회 2023 Plant biotechnology reports Vol.17 No.4

The members of the microRNA (miRNA) family exert essential roles in modulating plant growth and development as well as responses to diverse stresses, through negatively regulating their target genes at posttranscriptional or translational levels. In this study, we characterized taemiR9674a, a miRNA member in T. aestivum, in mediating plant responses to drought and salt stresses. Seven genes in total were predicted to act as the targets of tae-miR9674a via modulation of transcript cleavage. The transcripts of tae-miR9674a in roots and leaves were response to both stresses of drought and salt, displaying to be gradually upregulated following the progression of a 27-h regime of above stress treatments. The transgenic tobacco lines of tae-miR9674a exhibited modified growth traits under drought and salt treatments. Of these, the line with miRNA overexpression (i.e., Sen 1) improved drastically on plant biomass, leaf area, and root length, whereas that with its knockdown expression (Anti 1) significantly alleviated on above growth traits compared with wild type. The modified stress responses of tae-miR9674a were shown to be closely associated with the role of miRNA in regulating a suite of physiological parameters, of which Sen 1 displayed improved osmotic stress defensive-related traits, such as fastened stomata closing rate, increased leaf water retention capacity, enhanced osmolytes contents, and elevated antioxidant enzyme (AE) activities. The expression of NtP5CS1 involving proline biosynthesis and NtFeSOD, NtCAT1 and NtPOD4, the AE genes involved in modulating ROS homeostasis, was upregulated in Sen 1 upon drought and salt stresses, suggesting their involvement in miRNA-mediated plant drought and salt responses. Transcriptome analysis indicated that tae-miR9674a leads to modified expression of quantities of genes that functionally associate with GO terms “biological process”, “cellular component”, and “molecular function”, which are overrepresented by the biochemical pathways of phytohormones (i.e., ethylene and jasmonic acid), salt response, salt/drought osmotic stress response through abscisic acid-dependent pathway and reactive oxygen species (ROS) homeostasis. Our investigation suggested that tae-miR9674a is an essential mediator in plant osmotic stress tolerance by positively regulating osmotic stress acclimation, cellular ROS homeostasis, and related defensive processes.

Proteomic Analysis and Extensive Protein Identification from Dry,Germinating Arabidopsis Seeds and Young Seedlings

Xiang Jin,Kai-hua Wei,Qiang Fu,Bai-Chen Wang,Hong-Bing Li,Pei Han,Xue-min Zhang,Yu-Xian Zhu 한국생화학분자생물학회 2005 BMB Reports Vol.38 No.6

Proteomic Analysis and Extensive Protein Identification from Dry, Germinating Arabidopsis Seeds and Young Seedlings

Qiang Fu,Bai Chen Wang,Xiang Jin,Hong Bing Li,Pei Han,Kai Hua Wei,Xue Min Zhang,Yu Xian Zhu 한국생활환경학회 2005 BMB Reports Vol.38 No.6