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De novo assembly of the seed transcriptome and search for potential EST-SSR markers for an endangered, economically important tree species: Elaeagnus mollis Diels

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Journal of Forestry Research 2020年第3期31卷 759-767页

作者： yulin liu Siqiao Li Yunying Wang Pingyu liu Wenjing Han College of Forestry Northwest A&F UniversityYangling 712100People’s Republic of China

Seeds of Elaeagnus mollis(Elaeagnaceae) produce an edible oil and contain more vitamin E(Ve) than major oil-seed crops. Despite its economic value, there is no information on its genome sequence. Here, we used the Illumina platform to determine the seed transcriptome of *** to identify the genes related to Ve biosynthesis and potential simple sequence repeat(SSR) markers. In total, 100,999 unigenes were obtained with an average length of 605 bp and N50 of 985 bp. Of these unigenes,52,256(51.7%) were annotated in at least one public database(NT, NR, PFAM, Swiss Prot, KOG, KO, and GO)in searches using blastn/x. The unigene annotation identified 15 unigenes encoding six enzymes(GGR, HPPD,HPT/VTE2, MPBQ-MT/VTE3, TC/VTE1, and c-TMT/VTE4) putatively involved in Ve biosynthesis. In addition,16,810 SSRs distributed in 14,057 unigenes were *** these, 2820, 583, and 3423 SSRs were located in the 50–UTR, coding sequence(CDS), and 30–UTR regions,respectively, while the remaining 9984 SSRs had undetermined physical locations. The largest group of repeat motifs comprised mononucleotide repeats(70.76%), followed by dinucleotide(15.59%) and trinucleotide(12.10%)repeats. AG/CT(8.69%) and AAG/CTT(4.15%) were the main dinucleotide and trinucleotide repeats, ***, 9597 SSR-specific primer pairs were designed. Among 100 primer pairs selected randomly to determine their usefulness, 53 proved to be efficient. To the our best of knowledge, this work is the first study of the E. mollis transcriptome and constitutes valuable genomics data for future genetic engineering studies to alter the amount of Ve. The identified potential EST-SSR markers can be used for population genetics studies and assistedbreeding of E. mollis.

关键词： Elaeagnaceae Elaeagnus mollis Transcriptome Vitamin E Simple sequence repeats(SSR)

Compressed Sensing of Wireless Sensor Networks Data with Missed Measurements

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Chinese Journal of Electronics 2015年第2期24卷 388-392页

In Wireless sensor networks(WSNs),missed measurements may be caused by the sensor malfunction and interruption of communication between sensor nodes. The feasibility of exact recovery of WSNs data with missed measurements is analyzed in the framework of compressed sensing. A new incomplete measurement model was developed and the data reconstruction algorithm was proposed. The required number of the missing measurements and the sparsity condition of network data are found for exact compressed sensing of WSNs *** derivation shows that a WSNs data of length N with no more than M/(log(N/M) + 1) nonzero coefficients can be exactly recovered with M Gaussian measurements,provided that fraction of the missed measurements is less than a quarter of the Restricted isometry property(RIP)constant squared. Simulation results validate the theoretical results.

关键词： Wireless sensor networks Compressed sensing Missed measurements Data reconstruction

Effect of Fe, Si and Cooling Rate on the Formation of Fe-and Mn-rich Intermetallics in Al–5Mg–0.8Mn Alloy

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Journal of Materials Science & Technology 2016年第4期32卷 305-312页

作者： yulin liu Lei Luo Chaofei Han Liangyun Ou Jijie Wang Chunzhong liu Liaoning Provincial Key Laboratory of Light Alloys and Processing Technology School of Materials Science and Engineering Shenyang Aerospace University

The Fe- and Mn-rich intermetallics are of great effect on the mechanical properties of the AA5083 type alloy （Al-5Mg-0.8Mn）. The effect of Fe, Si and cooling rate on the formation of the intermetallics were investigated by analyzing the microstructures of the alloys with different Fe and Si contents. The results indicated that increasing the Fe content resulted in the increase of the Al6（Fe,Mn） phase in both amount and size. In the alloys with high Fe content, the platelet-like Al6（Fe,Mn） compounds lined up and formed a band. Increasing the content of Si resulted in the increase of the Mg2Si phase which formed a network structure. Increasing the cooling rate significantly refined the intermetallics. However, increasing the cooling rate did not change the characteristic of the intermetallic compounds in the alloys with low or medium Si contents. For the alloys with high contents of Fe and Si under the condition of near-rapid cooling, the Fe- and Mn-rich intermetallic compound changed to the quaternary Al15（Fe,Mn）3Si phase and displayed a fine fish bone or Chinese script structure. The refinement of the intermetallics would allow higher tol- erance of Fe and Si contents in the AA5083 alloy produced, for instance, via the continuous strip casting process.

关键词： Aluminum alloyIntermetallicsPhase transformationCastingRapid solidification

Interweaving Permutation Meets Block Compressed Sensing

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Chinese Journal of Electronics 2018年第5期27卷 1056-1062页

作者： ZHANG Bo liu yulin JING Xiaojun ZHUANG Jie WANG Kai Communication NCO Academy Army Engineering University Beijing University of Posts and Telecommunications University of Electronic Science and Technology of China

Traditional Block compressed sensing(BCS) schemes encode nature images via a fixed sampling rate without taking the sparsity level differences among the blocks into consideration. In order to improve the sampling efficiency, a permutation-based BCS scheme with separate reconstruction is considered in this paper. The error performance bound of BCS scheme is carefully analyzed, and it is revealed that the smaller the maximum block sparsity level of the 2D signal is, the better reconstruction performance the algorithm has. According to the theoretical analysis result, an interweaving-permutationbased BCS strategy is investigated. In the proposed approach, the maximum block sparsity level of the 2D signal can be reduced significantly by interweaving permutation. As a result, better reconstruction performance can be achieved. Simulation results show that the proposed approach improves the Peak signal-to-noise ratio(PSNR)of reconstructed-images significantly.

关键词： Block compressed sensing Interweaving permutation Image compression Image coding

Nutrient compositions of cultured Thalassiosira rotula and Skeletonema costatum from the Jiaozhou Bay in China

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Acta Oceanologica Sinica 2008年第4期27卷 147-155页

作者： SHEN Zhiliang WU yulin liu Qun YAO Yun Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China

Carbon, nitrogen, phosphorus, silicon composition of cultured two different sized phytoplankton common species of Thalazsiosira rotula and Skeletonema costatum from the Jiaozhou Bay were measured. Carbon, nitrogen, phosphorus, silicon contents in cell were obvious higher in T. rotula than in S. costatum, but the percents of nitrogen, phosphorus, sihcon contents in cell dry mass in T. rotula were lower than those in S. costatum. The dry mass concentrations of nitrogen,phosphorus, silicon in S. costatum were much higher than those in T. rotula, particularly silicon, the former was 6. 4 times of the latter, showing that S. costatum could more assimilate these elements. Especially, S. costatum had competitive dominance for assimilating silicon, which is beneficial to its becoming a major dominant species in relative short silicon of the Jiaozhou Bay. There were some differences in numerical value of nutrient ratios both laboratory-cultured phytoplankton and different sized suspended particulates （ mainly phytoplankton） in the Jiaozhou Bay, which was caused by the changes of environment. High contents of carbon, nitrogon and relative low phosporus, sil- icon, high molar ratio of nitrogen to phosphorus （far higher than Redfield value） and low ratio of silicon to phosphorus and silicon to nitrogen （far lower than Redfield values） in the two diatoms and different sized suspended particulates were consistent with those in the seawater. Relative short silicon in the seawater and phytoplankton showed that silicon was possibly affectting phytoplankton growth in the Jiaozhou Bay.

关键词： carbon nitrogen phosphorus,silicon composition Skeletonema costatum Thalazsiosira rotula Jiaozhou Bay

Influence of olivine grains on K-Ar dating of Late-Cenozoic olivine basalts in eastern China

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Chinese Science Bulletin 1998年第19期43卷 1663-1665页

作者： Zhiguo Mu yulin liu Baoling Huang Peking Univ Dept Geol Beijing 100871 Peoples R China

Five Late-Cenozoic olivine basalt samples, taken from 3 young volcanoes (Keluo, Lianhuashan and Qinglongshan) located in the north of Heilongjian Province, were dated by the conventional K-Ar dating method. The apparent ages of whole rock are (0.06±0.01) Ma,( 0.15±0.03) Ma, (0.17±0.02) Ma, (21.10±0.13) Ma and (24.46±0.10) Ma, respectively. In the crushed sample grains (mush number 80-100)olivine(including phynocryst and xenocryst)was picked out under a binocular microscope, then apparent ages obtained are (0.03±0.01) Ma, (0.06±0.01) Ma, (0.07±0.03) Ma, (2.31±0.02) Ma and (1.50±0.21) Ma, respectively. The apparent ages of the olivine-picked out sample are come down (younger)50 to over 90. There are a lot of the Late-Cenozoic volcanic olivine basalt outcropping in eastern China, probably the age-datings of those basalt samples in which olivine grains are unpicked out are older than the true geological ages. The inference and conclusion drawn from those datings should be renewed.

关键词： olivine crystalline grain Late-Cenozoic olivine basalt K-Ar dating eastern China.

Nanoparticle/Microsphere TiO_(2)/Bi_(2)WO_(6) Z-scheme Heterojunction with Excellent Visiblelight Photocatalytic Performance

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Journal of Wuhan University of Technology(Materials Science) 2022年第6期37卷 1114-1122页

作者： ZHAO Mengxue liu yulin LIAO Guosheng HE Jinyun QIN Ningbo 无 Key Laboratory of New Processing Technology for Nonferrous Metal&Materials Ministry of Education/Guangxi Key Laboratory of Optical and Electronic Materials and DevicesGuilin University of TechnologyGuilin 541004China School of Urban Construction Wuhan University of Science and TechnologyWuhan 541004China School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China

Flower-like BiOBr/Bi_(2)WO_(6) Z-scheme heterojunction was prepared by a twostep solvothermal *** microspheres were firstly synthesized through solvothermal *** the out part of the BiOBr microspheres was designed to react with Na2WO4 forming Bi_(2)WO_(6) nanosheets through ion exchange *** BiOBr/Bi_(2)WO_(6) heterojunction has a larger BET surface area,smaller energy band gap,faster transfer of charge carriers and a much better visible-light photocatalytic performance than that of BiOBr and Bi_(2)WO_(6).It also has a better cycling stability than that of the *** photocatalytic mechanism of the BiOBr/Bi_(2)WO_(6) heterojunction is proposed.

关键词： TiO_(2)/Bi_(2)WO_(6) Z-scheme visible-light photocatalytic performance hydrothermal method

Geochronology and Geochemistry of the Tinggong Porphyry Copper Ore Deposit, Tibet

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Acta Geologica Sinica(English Edition) 2014年第3期88卷 780-800页

作者： CHEN Rui liu yulin GUO Lishuang WANG Zhenghua liu Hongfei XU Kaifeng ZHANG Jinshu Key Laboratory of Orogenic Belt and Crustal Evolution MOE Peking University Key Laboratory of Crustal Dynamics Institute of Crustal Dynamics CEA Wanbao Mining Limited Tibet Institute of Geological Survey

We have determined the ages of the ore-bearing Tinggong porphyries and the Eocene granites using the LA-ICPMS zircon U-Pb *** from one adamellite porphyry and two diorite porphyries yield ages of 15.54±0.28 Ma,15.02±0.25 Ma and 14.74±0.22 Ma,*** ages of two granites are 50.48±0.71 Ma and 50.16±0.48 *** Rare Earth Elements （LREE） are enriched in the ore-bearing adamellite porphyries,which are high-K caic-alkaline and metaluminous,while Heavy Rare Earth Elements （HREE） and Y are strongly depleted,indicating an adakitic *** Large Ion Lithophile Elements （LILE） of the adamellite porphyries are highly enriched,whereas some High Field Strength Elements （HFSE） are *** diorite porphyry in this study is chemically similar to the adamellite porphyries,except that the Mg# of the diorite porphyry is a little higher,demonstrating more mantle *** samples from different rocks are selected for in situ zircon Hf isotopic *** samples show positive εHf（t） values and young Hf model ages,indicating their derivation from juvenile ***,the adamellite porphyry and diorite porphyry formed in the Miocene exhibit more heterogeneous Hf isotopic ratios,with lower （Σ）Hf （t） values than the granites formed in the Eocene,suggesting the involvement of old Indian continent crust in their *** geochronology and geochemistry of the adamellite porphyries and the diorite porphyries indicate that they formed from the same source region in a post-collisional environment,but contaminated by crust and mantle materials in different *** metallic minerals formed mainly during the older adamellite porphyry stage,but they were recycled and reactivated by the diorite porphyry intrusion.

关键词： Tinggong Adamellite porphyry Diorite porphyry Zircon U-Pb-Hf isotope Geochemistry

Influence of Si content and heat treatment on microstructure of Al-Fe-Si alloys

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China Foundry 2014年第5期11卷 418-422页

作者： Zhao Yuhua Wang Xiubin liu yulin Wang Chao School of Materials Science and Engineering Shenyang Aerospace University

The effect of Si addition and heat treatment on the Al-5wt.%Fe al oy has been investigated by OM, SEM-EDS and XRD. The results show that the Si plays a significant role in refining the primary Al3Fe phase. It was found that the addition of 3.0wt.% Si made the al oy present the finest and wel -distributed primary Al3Fe phase, but the Al3Fe phase almost disappeared when 5wt.% Si was added. With further increase in the Si content, some Fe-rich phases appeared in the inter-grains and coarsened. In addition, the heat treatments exert a significant impact on the microstructural evolution of the Al-5wt.%Fe-5wt.%Si al oy. After heat treatment for 28 hours at 590 oC, the coarse platelet or blocky Fe-rich phase in Al-5wt.%Fe-5wt.%Si al oys was granulated; the phase transformation from metastable platelet Al3FeSi and blocky Al8Fe2Si to stable Al5FeSi had occurred. With the extension of heat treatment, the Si phase coarsened gradual y.

关键词： Al-Fe alloy Fe-rich primary phase silicon heat treatment