Study on Importance Function for Particle Filter

Liu Lu,Meng Yang,Shu Geng,Shu-fen Wang,Yong-hui Wang 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.2

As an important nonlinear filter theory, particle filter is a heated issue in domestic and foreign researches. The option of importance density is one of the key steps of particle filter algorithm. The proper option of importance density can minish the negative influence of filter algorithm caused by degeneracy problem. This paper introduces several widely-used options of importance density systemically, and analyzes their features and applied perspectives respectively. The paper also advances a comprehensive method of importance density, analyzes its technical features, explores the adjudgement and improvement of this method based on various performance, and finally puts forward the necessary further study according to the engineer requirements.

Promoting effect of the Maillard reaction products produced during the stir-frying process of Hordei Fructus Germinatus on the intestinal absorption of active ingredients in Hordei Fructus Germinatus

Lu Wu,Li Xia Tan,Fen Fang Gong,Yu Xia,Rui Ge Chu,Hua Sheng Yang 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.5

This study was designed to evaluate theabsorption promoting capacity of Maillard Reaction Products(MRPs) produced during the stir-frying process ofHordei Fructus Germinatus on catechin, ferulic acid,quercetin and kaempferol by the ex vivo rat everted gut sacmodel, in situ single-pass intestinal perfusion model andthe whole animal model. Moreover, verapamil, EDTA andmannitol were used for determining the transport mechanismof catechin, ferulic acid, quercetin and kaempferol. The tight junction (TJ) proteins including zonula occudens-1(ZO-1) and claudin-1 were chosen to investigate thepromoting mechanism of MRPs by quantitative real-timePCR (qRT-PCR) and western blot analyses. The resultsshowed that the MRPs produced during the stir-fryingprocess of Hordei Fructus Germinatus could improve theintestinal absorption of catechin, ferulic acid, quercetin andkaempferol. And the absorption-promoting effect of MRPswas related to chelating effect and the reduced expressionof claudin-1 and ZO-1. Our results suggested that MRPscould be promising oral absorption promoters, which mightbe another processing mechanism of Hordei FructusGerminatus.

Preliminary study on the effect of using unmanned aerial vehicles (UAVs) to control Spodoptera frugiperda

Lu Hui,Li Fen,Zhu Xiaoming,Tang Jihong,Lyu Baoqian,Wu Shaoying 한국곤충학회 2021 Entomological Research Vol.51 No.9

Spraying insecticides by unmanned aerial vehicle (UAV) is an effective method to prevent and control Spodoptera frugiperda. This study investigated the influences of different UAV types, spray adjuvants, spray times, maize growth periods, and insecticides on S. frugiperda in three cities, Hainan Province, China. The results showed that at least two times are needed to spray insecticides using UAVs when controlling the S. frugiperda. Both UAVs had a substantially higher control effect and lower cost than artificial spray methods. Oil spray adjuvant Refei was more suitable for both UAVs than Tiancheng to control pests. Chlorantraniliprole had the best control effect of up to 90%. The control effects at the seedling stage and small bell stage of S. frugiperda were 94.3% and 91.3%, respectively. Spraying at 7:00 am and 7:00 pm by UAVof T20 had good control effect on S. frugiperda in three cities.

Privacy-Preserving Key-Updatable Public Key Encryption with Keyword Search Supporting Ciphertext Sharing Function

( Fen Wang ),( Yang Lu ),( Zhongqi Wang ),( Jinmei Tian ) 한국인터넷정보학회 2022 KSII Transactions on Internet and Information Syst Vol.16 No.1

Public key encryption with keyword search (PEKS) allows a user to make search on ciphertexts without disclosing the information of encrypted messages and keywords. In practice, cryptographic operations often occur on insecure devices or mobile devices. But, these devices face the risk of being lost or stolen. Therefore, the secret keys stored on these devices are likely to be exposed. To handle the key exposure problem in PEKS, the notion of key-updatable PEKS (KU-PEKS) was proposed recently. In KU-PEKS, the users’ keys can be updated as the system runs. Nevertheless, the existing KU-PEKS framework has some weaknesses. Firstly, it can’t update the keyword ciphertexts on the storage server without leaking keyword information. Secondly, it needs to send the search tokens to the storage server by secure channels. Thirdly, it does not consider the search token security. In this work, a new PEKS framework named key-updatable and ciphertext-sharable PEKS (KU-CS-PEKS) is devised. This novel framework effectively overcomes the weaknesses in KU-PEKS and has the ciphertext sharing function which is not supported by KU-PEKS. The security notions for KU-CS-PEKS are formally defined and then a concrete KU-CS-PEKS scheme is proposed. The security proofs demonstrate that the KU-CS-PEKS scheme guarantees both the keyword ciphertext privacy and the search token privacy. The experimental results and comparisons bear out that the proposed scheme is practicable.

Flower cultivation regimes aff ect apocarotenoid accumulation and gene expression during the development of saff ron stigma

Gui-Fen Zhou,Li-Qin Li,Jiemiao Lu,Jing Li,Chong Yao,Peng Sun,Kaohua Liu,Yan Dong,Luping Qin,Xiao-Dong Qian 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.3

The quality of commercial saff ron largely depends on apocarotenoid levels. Whether they are aff ected by diff erent fl owercultivation regimes remains unknown. In present study, apocarotenoid levels and the expression profi les of 12 genes relatedto apocarotenoid biosynthesis between fi eld- and indoor-cultivated Crocus sativus L. were analyzed during stigma development. Under both cultivation regimes, apocarotenoid accumulation and gene expression showed similar profi les, fi rstsharply increasing and then gradually decreasing with stigma development, which suggested the coordinated function ofgene expression and apocarotenoid accumulation. However, the rate of increase/decrease varied widely between two blossomregimes at diff erent developmental stages. Based on correlation analysis, βCH1 and ZDS seemed to play a more crucial rolein apocarotenoid accumulation under both cultivation regimes. At anthesis, the total apocarotenoid level in saff ron cultivatedin the fi eld was higher than that cultivated indoors. This may be due to lower gene expression levels in the apocarotenoidpathway, especially βCH1 , ZDS , and CCD2 , and higher CCD4a and NCED expression in the competitive pathway in saff roncultivated indoors than that in the fi eld, which indicated higher conversion in apocarotenoid biosynthesis fl ux from crocinsand picrocrocin synthesis to β-ionone and the ABA biosynthetic branch in saff ron cultivated indoors. These results providevaluable information for modifying planting mode to enhance saff ron quality.

Three homologous genes encoding functional D8-sphingolipid desaturase in Populus tomentosa

Shu-Fen Li,Zan-Min Hu,Guo-Jun Zhang,Ying-Chun Yuan,Cong-Hui Wang,Wu-Jun Gao,Chuan-Liang Deng,Long-Dou Lu 한국유전학회 2014 Genes & Genomics Vol.36 No.3

Δ8-sphingolipid desaturase is characterized by itsability to catalyze desaturation at the C8 position of the longchainbase of sphingolipids in plants. No previous studieshave been conducted on genes encoding Δ8-sphingolipiddesaturases in the woody plant Populus tomentosa. In thisstudy, three genes that encode Δ8-sphingolipid desaturasewere isolated fromP. tomentosa. Among these genes, PtD8Aand PtD8B showed high sequence similarity; whereas PtD8Cexhibited large sequence divergence.RT-PCRresults showedthat PtD8A and PtD8B were expressed in all tissues detected,whereas PtD8C was not expressed in roots. Heterologousexpression in yeast revealed that PtD8A/B/C were functionalΔ8-sphingolipid desaturases, and can catalyze the C18-phytosphingeninedesaturation to produce 8(Z)- and 8(E)-C18-phytosphingenine.However, the conversion rate and ratios ofthe two products differed. Compared with control cells,transgenic yeasts expressing PtD8A/B/C exhibited enhancedaluminum tolerance. Our findings further elucidated thebiochemical functions and evolutionary history ofΔ8-sphingolipid desaturases in plants. Candidate genes forbreeding new poplar germplasm resources with enhancedtolerance ability to aluminium were also provided.

Analysis of Volatile Compounds of Jasmine Scented Tea during the Orthodox Manufacturing Process Using HS-SPME/GC-MS

Jian Lu,De-Jun Fu,Dong-Fen Wu,Yu Liu,Yao-Ping Luo 한국차학회 2015 한국차학회지 Vol.- No.S

Volatile components of jasmine-scented tea during the orthodox manufacturing process were extracted using Headspace solid-phase microextraction (HS-SPME) and the major flavor compounds were identified by Gas chromatography-mass spectrometry/Retention indices (GC-MS/RI). The major volatile compounds extracted by SDE could also be obtained by HS-SPME, which appears more suitable for extraction of aromatic compounds, for its advantages of simplicity and convenience. The GC-MS chromatograms of tea samples showed that the aromatic constituents of jasmine tea had been identified in composition after 1st scenting, which contained 6 apparently high peaks representing linalool, benzyl acetate, α-farnesene, (Z)-3-hexenyl benzoate, methyl anthranilate, and indole. According to the change of peak area of major volatile compounds, (Z)-3-hexenyl acetate and (Z)-3-hexenyl butyrate with green grass aroma reduced by 71.13% and 63.10% respectively in jasmine tea product, while 7 compounds with favorable flowery fruity aroma-benzyl acetate, (Z)-3-hexenyl benzoate, linalool, benzyl alcohol, α-farnesene, methyl anthranilate and indole- increased by 17.84%, 28.33 times, 32.49%, 1.70 times, 6.67 times, 11.84 times and 21.48 times respectively, comparing to the base tea. Besides, nerolidol (fruity-flowery) and germacrene D (woody), not detected in the base tea also gradually increased. The quality grade of jasmine tea was potentially correlated to the ratio of peak area of the 9 favorable compounds to that of the 2 grass compounds. After 1st scenting, the peak areas of compounds from jasmine flower increased by 1.81×105-18.24×105, and decreased by 36.14%-69.95% after the 1st drying. The peak areas of some components detected in both the base tea and jasmine flowers, like (Z)-3-hexenyl acetate and methyl salicylate, increased by 9.05%-57.60% of those of the base tea after 1st scenting, and lost more than 100% after the 1st drying, while the increased peak areas of some other components both detected, like α-farnesene and indole, were more than peak areas of the base tea, with 30%- 95% loss after the 1st drying. The content change tendency of volatiles during 2nd scenting and the 2nd drying were consistent with those during 1st scenting and the 1st drying. After raising fragrance, the contents of some low boiling point volatiles and compounds not detected in the base tea increased.

Comestible and temperature effects on the biological traits of fall armyworms, Spodoptera frugiperda

Li Fen,Wang Likui,Lu Rongcai,Peng Zhengqiang,Malhat Farag,Lyu Baoqian,Wu Shaoying 한국곤충학회 2021 Entomological Research Vol.51 No.10

Spodoptera frugiperda is considered a serious pest for many crops throughout the world. Here, we develop an easy and quick-to-prepare solid medium with multiple benefits, including reductions in cost, post-rearing waste, storage space, and labor, for rearing S. frugiperda larvae. The body length and weight at each development stage showed no differences with those of the corn leaves treatment group (P > 0.05). The development time of F0 generation from the first to adults stage was 51.27 ± 4.62 days when the larvae were reared on artificial diet, which is slightly longer than the 50.69 ± 4.56 days for those reared on corn leaves diet (P > 0.05). The temperature changes have no effect on body length and weight when the fall armyworms are reared on artificial diet, however, the influence of temperature change on development was more obvious. The development time was significantly longer at 18°C and shorter at 35°C than that at 25°C (P < 0.05). Furthermore, in the age-specific two-sex life table method, the life table parameters (i.e., r, λ, R0, GRR) significantly decreased at 18°C and 35°C compared with those at 25°C. The age–stage survival rate of S. frugiperda was higher on artificial diet at 25°C than 18°C, 35°C, and on corn leaves at 25°C in all stages. The 35°C temperature change had more influence on the age–stage survival than the other temperatures. This study provided ideal indoor breeding conditions for fall armyworm and sufficient materials for further indoor and outdoor research.

Postmortem Proteolysis of Breast and Leg Muscles from Taiwan Colored Chickens and Silkie Bantams

Tsai, Shih-Fen,Lin, Chia-Ying,Lu, Jin-Jenn,Chou, Rong-Ghi R. Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.5

Postmortem proteolysis of breast (BM) and leg (LM) muscles from Taiwan colored chickens (TCC) and silkie bantams (SB) at $5^{\circ}C$ were compared. Myofibrils were prepared from BM and LM samples that were randomly taken from the carcasses of SB and TCC after 0, 1, 3, 7 and 14 days of storage at $5^{\circ}C$. pH of samples was determined, and degradation of myofibrillar proteins was analyzed by the SDS-PAGE and western blots. The results showed that pH was lower in BM than in LM samples from both avian strains. Appearance of 30 kDa components and disappearance of titin and nebulin were more rapidly as seen on SDS-PAGE in BM than in LM samples. Western blots labeled with a monoclonal antibody to desmin also demonstrated that desmin degraded more quickly in BM samples. Our data might suggest that postmortem proteolysis occurred more rapidly in BM than in LM from both TCC and SB.

Effect of sintering temperature on structure and properties of Nd2O3 and CeO2 co-doped zeolite waste

Beilong Yuan,Fen Luo,Yulong Miao,Yuanyuan Zhao,Xirui Lu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-

Radioactive zeolite waste is a potential threat to human health and the living environment. Therefore, thetreatment and disposal of radioactive zeolite waste is an urgent problem to be solved. In this work, theco-doped simulated radioactive contaminated zeolite has been successfully immobilized. The effect ofsintering temperature on the microstructure, mechanical properties and chemical durability of codopedzeolite sintered matrix was evaluated. Samples were sintered at 1400 C and 1500 C for 1 h. Asthe sintering temperature increases, the total solid solubility limit of sintered samples increased from25 wt.% (Nd2O3: 15 wt.%, CeO2: 10 wt.%) to 55 wt.% (Nd2O3: 20 wt.%, CeO2: 35 wt.%,). The greaterVickers hardness (6.73 GPa) and density (2.93 gcm3) were achieved in sample No. 9 sintered at1500 C. The normalized leaching rates of Ce and Nd in sample No. 9 sintered at 1500 C are0.83 10-7 gm2d-1 and 3.42 10-7 gm2d-1, respectively.