708 Hits in 1.5 sec

Hadamard `Pipeline' Coding Computational Ghost Imaging [article]

Cheng Zhou, Xiwei Zhao, Heyan Huang, Gangcheng Wang, Xue Wang, Lijun Song, Kang Xue
2019 arXiv   pre-print
The Hadamard matrix with orthogonality is a more important modulation matrix for computational ghost imaging (CGI), especially its optimized Hadamard matrix. However, as far as we know, little mention has been paid to efficient and convenient Hadamard matrix generation for CGI. The existing methods are to reconstruct any row of Hadamard matrix into two-dimensional matrix and then optimize it. In this work, we propose a Hadamard 'pipeline' coding computational ghost imaging approach, which can
more » ... rectly generate two-dimensional Hadamard derived pattern and Hadamard optimization sequence, whereby both the memory consumption and the complexity of coding implementation for CGI can be significantly reduced. The optimization method of commonly used hadamard optimization sequence implementation is also discussed. This method provides a new approach for Hadamard sequence optimization and ghost imaging applications.
arXiv:1910.06731v1 fatcat:qcvxzrldezdnhd4toj2kgsngvu

Gold Matrix Ghost Imaging [article]

Xiwei Zhao, Xue Wang, Wenying Zhang, Shanshan Jia, Cheng Zhou and Lijun Song
2019 arXiv   pre-print
Light field modulation matrix is closely related to the quality of reconstructed image in ghost imaging. The orthogonality light field modulation matrix with better noise immunity and high quality reconstructed image is urgently needed in the practical application of ghost imaging. In this work, we propose a Gold matrix ghost imaging method with excellent imaging and anti-noise performance, which is proud of the pseudo-randomness and orthogonality of the deterministic Gold matrix. Numerical
more » ... lation and experimental results show that the Gold matrix has the characteristics of both random speckle and Hadamard matrix, and the reconstructed images are superior to the two modulation matrixes under the condition of noise, which shows better imaging robustness.
arXiv:1911.05451v1 fatcat:gyiby3rijbajnmo6szejftvrw4

Impact of Premorbid Infection on Onset and Disease Activity of Rheumatoid Arthritis [article]

Ruijun Zhang, Li Jing, Chen Jiali, Chen Xiaomei, Li Xue, Li Chun, Jia Yuan, Zhou Yunshan, Re Limin, Li Lijun, He Jing, Li Lijun
2018 bioRxiv   pre-print
Objective: Infections have been implicated in rheumatoid arthritis (RA) development. However, the impact of premorbid infection on initiation and perpetuation of RA has not been well elucidated. Thus, we sought to conduct a large scale on-site survey to study whether premorbid infection may trigger RA and influence status of the disease. Methods: Premorbid infectious events were collected in cohort of 902 RA patients from December 2015 to June 2016. Type of infections prior to RA onset and its
more » ... ossible effects on disease status were analyzed. Result: Three hundred and thirty-four out of 902 patients (37.03%) experienced infections within one month preceding RA onset. The most frequent infections were respiratory (16.08%), intestinal (11.09%) and urinary tract (9.87%) infection, respectively. The infection was associated with increased disease activity. Early onset was found in patients with urinary infection. High disease activity risk was increased in patients who pre-exposure to urinary infection (OR=3.813, 95%CI=1.717-12.418) and upper respiratory infection (OR=2.475, 95%CI= 0.971-6.312). Conclusion: Pre-exposure infections are associated with development of RA. Severe disease status of RA and persistent of active disease status are related to preceding infections.
doi:10.1101/358853 fatcat:xl4qwr34xjbotkdp7lou5xwvc4

Clinical significance of prognostic nutritional index in predicting the efficacy in patients with B-cell lymphoma

Lijun Xiao, Sirou Xiao, Zili Fan
2020 Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences  
To investigate the clinical significance of prognostic nutritional index (PNI) in predicting the efficacy in patients with B-cell lymphoma. The clinical data from 111 patients with B-cell lymphoma (B-cell lymphoma group), who were newly diagnosed in the Third Xiangya Hospital of Central South University from February 2013 to September 2018, were retrospectively analyzed. A total of 93 volunteers selected from the Health Management Center in the Third Xiangya Hospital were set as control, The
more » ... was compared between the 2 groups. The PNI cut-off value was determined by receiver operating characteristic (ROC) curve analysis. According to the PNI values of patients before chemotherapy, the patients were also divided into a high PNI group (≥43.5) and a low PNI group (<43.5). The correlation of baseline characteristics was evaluated. The correlation between changes in PNI levels and efficacy were evaluated before and after chemotherapy. The PNI value in the B-cell lymphoma group was significantly lower than that in the healthy control group (P<0.05). Lactate dehydrogenase (LDH), presence or absence of B symptoms, international prognostic index (IPI), Eastern Cooperative Oncology Group (ECOG) performance status, source of germinal center, and the efficacy between the high PNI group and the low PNI group were significantly different (all P<0.05). The mean PNI in the effective patients in the low PNI group was increased from 38.10 before chemotherapy to 42.66 after chemotherapy, with significant difference (t=-2.562, P<0.05). The PNI value in the ineffective patients in the high PNI group was decreased from 50.50 before chemotherapy to 41.45 after chemotherapy, with significant difference (t=3.044, P<0.05). The level of PNI in patients with B-cell lymphoma is significantly lower than that in healthy people, and it is related to the baseline characteristics of prognosis. The change of PNI level before and after chemotherapy can provide certain basis for efficacy evaluation.
doi:10.11817/j.issn.1672-7347.2020.190005 pmid:32386038 fatcat:6p2vfs7wcjbzdbtxdskr7io4ke

Decoupled implementation? Incident reporting in Chinese shipping

Conghua Xue, Lijun Tang, David Walters
2018 Economic and Industrial Democracy  
., 2013; Xue et al., 2017) . These findings point to a lack of commitment from top management to OHS and ISM implementation.  ... 
doi:10.1177/0143831x18758175 fatcat:xkk5mzskebfzffkdcvf245nria

Expression of UBE2C in lung adenocarcinoma based on database analysis and its clinical significance

Ying Liu, Fengxiang Huang, Hongjie Chen, Qiang Peng, Chang Zhao, Lijun Miao
2020 Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences  
To analyze the expression level of ubiquitin conjugating enzyme E2C (UBE2C) in lung adenocarcinoma and its clinical significance. The differences in mRNA and protein expression levels of UBE2C in normal lung tissues and lung adenocarcinoma (LUAD) tissues were determined with the Cancer Genome Atlas (TCGA), Oncomine, and human protein atlas (HPA) databases. Receiver operating characteristic (ROC) curve analysis was used to evaluate the diagnostic value of UBE2C in LUAD. The correlation between
more » ... E2C and LUAD clinicopathological parameters, as well as its relationship with LUAD prognosis was analyzed based on TCGA, International Cancer Genome Consortium (ICGC), and cbioPortal databases. Gene set enrichment analysis (GSEA) was used to analyze the possible pathways of UBE2C in the progression of LUAD. The mRNA expression level of UBE2C was higher in LUAD tissues than in the normal lung tissues (P<0.01) and it was positively correlated with TNM and N stages (both P<0.05). The UBE2C protein expression level was also increased in LUAD tissues than in the normal lung tissues (P<0.01). ROC curve analysis indicated that UBE2C could be used as an auxiliary diagnostic index for LUAD (AUC=0.969, 95% CI 0.953 to 0.984, P<0.01). Survival analysis showed that the overall survival (OS) of UBE2C high expression group was significantly lower than that of low expression group (P<0.05). The OS of LUAD patients with UBE2C change was lower than that of patients without change (P<0.01). UBE2C was highly expressed in the gene set relevant to cell cycle, p53 signaling pathway, DNA mismatch repair, and DNA replication (all P<0.01). The expression level of UBE2C is significantly up-regulated in LUAD tissues. The high expression or genetic alteration of UBE2C indicates poor prognosis in LUAD patients. UBE2C can be used as a potential molecular diagnostic marker for LUAD and a potential target for LUAD treatment.
doi:10.11817/j.issn.1672-7347.2020.190189 pmid:33051417 fatcat:glggnan6mncn7c54wtqf6vlf4e

Nearly Optimal Regret for Stochastic Linear Bandits with Heavy-Tailed Payoffs [article]

Bo Xue, Guanghui Wang, Yimu Wang, Lijun Zhang
2020 arXiv   pre-print
One fundamental limitation of stochastic MAB is that it ignores the side information (contexts) inherent in the aforementioned real-world applications, such as the user and web- * Lijun Zhang is the corresponding  ... 
arXiv:2004.13465v1 fatcat:56jqv2oaibcwhiyx6oqi3ow2sq

The Extracting Technology of Polysaccharide from Tartary Buckwheat

Lijun Wang, Xue Bai
2017 Sustainability in Environment  
<p>Buckwheat (F. tartaricum Gaertn) has many functions of dietotherapy and health care, which are beneficial to the treatment of diabetes, hypertension, cardiovascular disease, anti-cancer and so on. Buckwheat polysaccharide is one of important functional ingredients of Buckwheat. In this paper, the extracting technologies of polysaccharide from Tartary buckwheat were investigated. The results showed that the optimum parameters for the extraction is solid to liquid ratio 1:20, temperature 85?,
more » ... uration 120min, extraction for 2 times, alcohol concentration 80%.</p>
doi:10.22158/se.v2n4p344 fatcat:w26vvcofordy3phez2psehc4p4

DSCN: double-target selection guided by CRISPR screening and network [article]

Enze Liu, Xue Wu, Lei Wang, Yang Huo, Lang Li, Lijun Cheng
2021 bioRxiv   pre-print
Lei Wang, Xue Wu, Yang Huo and Huanmei Wu provided technical support and valuable comments to the study. Lang Li and Lijun Cheng designed the study.  ... 
doi:10.1101/2021.09.06.459081 fatcat:pt4iblsvn5hhhiqu6dzf766o54

On the Heat Transfer Enhancement of Plate Fin Heat Exchanger

Yuan Xue, Zhihua Ge, Xiaoze Du, Lijun Yang
2018 Energies  
The plate fin heat exchanger is a compact heat exchanger applied in many industries because of its high thermal performance. To enhance the heat transfer of plate fin heat exchanger further, three new kinds of wavy plate fins, namely perforated wavy fin, staggered wavy fin and discontinuous wavy fin, are proposed and investigated by computational fluid dynamics (CFD) simulations. The effects of key design parameters, including that of waviness aspect ratios, perforation diameters, staggered
more » ... os and breaking distance are investigated, respectively, with Reynolds number changes from 500 to 4500. It is found that due to the swirl flow and efficient mixing of the fluid, the proposed heat transfer enhancement techniques all have advantages over the traditional wavy fin. At the same time, serration is beneficial to reduce the friction factor, and the breaking technique can reduce heat transfer area. Through the performance evaluation criteria, the staggered wavy fin has an advantage over the small waviness aspect ratio; with increasing waviness aspect ratio, this predominance is gradually surpassed by the perforated wavy fin, and the advantage of the discontinuous fin is the smallest and almost invariable. A maximum performance evaluation criteria (PEC) as high as 1.24 can be obtained for the perforated wavy fin at the waviness aspect ratio γ = 0.45.
doi:10.3390/en11061398 fatcat:iocg64mypzfbpjdprnvzrqpqum

An Eye-movement Study on Problem Finding Process of Undergraduates

2014 Acta Psychologica Sinica  
doi:10.3724/sp.j.1041.2014.00367 fatcat:kvrwowa5prddja5lq6hgp2s4nq

Ensemble Defense with Data Diversity: Weak Correlation Implies Strong Robustness [article]

Renjue Li, Hanwei Zhang, Pengfei Yang, Cheng-Chao Huang, Aimin Zhou, Bai Xue, Lijun Zhang
2021 arXiv   pre-print
In this paper, we propose a framework of filter-based ensemble of deep neuralnetworks (DNNs) to defend against adversarial attacks. The framework builds an ensemble of sub-models -- DNNs with differentiated preprocessing filters. From the theoretical perspective of DNN robustness, we argue that under the assumption of high quality of the filters, the weaker the correlations of the sensitivity of the filters are, the more robust the ensemble model tends to be, and this is corroborated by the
more » ... riments of transfer-based attacks. Correspondingly, we propose a principle that chooses the specific filters with smaller Pearson correlation coefficients, which ensures the diversity of the inputs received by DNNs, as well as the effectiveness of the entire framework against attacks. Our ensemble models are more robust than those constructed by previous defense methods like adversarial training, and even competitive with the classical ensemble of adversarial trained DNNs under adversarial attacks when the attacking radius is large.
arXiv:2106.02867v1 fatcat:wlc5cihqenezbmgsmq6ywnei3a

Descriptive modeling language based on semantic

Lijun Xue, Lili Wang
2012 2012 First National Conference for Engineering Sciences (FNCES 2012)  
Aiming at the shortage of current modeling by graphical modeling language, this paper presents a descriptive modeling language based on Semantic.This paper mainly introduces the design principle, modeling primitives to describe the modeling language and the design of the parser and the implementation process of this descriptive modeling language. The experimental results show that, the modeling language basically corresponds the thinking and operation habit of users, reduces complexity and
more » ... culty of the virtual scene modeling, accelerate the speed of modeling. Lack of Graphical ModelingLanguage Modeling
doi:10.1109/nces.2012.6543799 fatcat:42dqyjlydzbx5hsofmvznpgl3a

Improving Neural Network Verification through Spurious Region Guided Refinement [article]

Pengfei Yang, Renjue Li, Jianlin Li, Cheng-Chao Huang, Jingyi Wang, Jun Sun, Bai Xue, Lijun Zhang
2020 arXiv   pre-print
We propose a spurious region guided refinement approach for robustness verification of deep neural networks. Our method starts with applying the DeepPoly abstract domain to analyze the network. If the robustness property cannot be verified, the result is inconclusive. Due to the over-approximation, the computed region in the abstraction may be spurious in the sense that it does not contain any true counterexample. Our goal is to identify such spurious regions and use them to guide the
more » ... n refinement. The core idea is to make use of the obtained constraints of the abstraction to infer new bounds for the neurons. This is achieved by linear programming techniques. With the new bounds, we iteratively apply DeepPoly, aiming to eliminate spurious regions. We have implemented our approach in a prototypical tool DeepSRGR. Experimental results show that a large amount of regions can be identified as spurious, and as a result, the precision of DeepPoly can be significantly improved. As a side contribution, we show that our approach can be applied to verify quantitative robustness properties.
arXiv:2010.07722v1 fatcat:62n6gql5lfbrzb7pl3kj46zbpa

Effect of different clear corneal incision sites on surgery efficacy and anterior segment parameters in patients undergoing phacoemulsification

Lijun Wang, Xiting Yang, Yi Zhang, Dingying Liao, Lin Zhao, Jianming Wang
2018 Nan fang yi ke da xue xue bao = Journal of Southern Medical University  
To determine the safe distance range of clear corneal incision (CCI) from the corneal limbus and how different CCI sites affect surgery efficacy and anterior segment parameters in patients undergoing phacoemulsification. This retrospective case-control study was conducted in 44 patients (44 eyes) undergoing phacoemulsification and IOL implantation. The patients were divided into two groups with CCI distances ranging from 1 mm to 1.5 mm (group A, n= 22) and from 0.5 mm to 1.0 mm (group B, n=
more » ... The visual acuity, surgically induced astigmatism (SIA), corneal aberration, and anterior segment parameters were analyzed. Compared with the preoperative data, all the patients showed significant improvements in the postoperative uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), anterior chamber depth (ACD), and anterior chamber angle (ACA) after the surgery (P < 0.05). No significant differences were found between the two groups in postoperative UCVA, BCVA, SIA, total corneal aberration RMS, lower- and higher-order aberration RMS, spherical aberration (Z40), horizontal three leaf clover (Z33), vertical three leaf clover(Z3-3), horizontal coma(Z31), vertical coma(Z3-1), ACD, ACA, anterior chamber volume, or central corneal thickness (P>0.05). Phacoemulsification is an effective therapy for cataract with a CCI distance range either of 1-1.5 mm or 0.5-1.0 mm. These two CCI distance ranges produce no significant differences in the visual quality following phacoemulsification, indicating that a CCI distance range of 0.5-1.5 mm can be safe for phacoemulsification.
doi:10.12122/j.issn.1673-4254.2018.12.15 pmid:30613019 pmcid:PMC6744207 fatcat:lxnhqussgzaprpszsqyd5kzjtm
« Previous Showing results 1 — 15 out of 708 results