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Quasi-secure quantum dialogue using single photons

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science china(Physics,Mechanics & Astronomy) 2007年第5期50卷 558-562页

作者： YANG YuGuang1,2 & WEN QiaoYan31 college of Computer science and technology, beijing university of technology, beijing 100022, china 2 State Key Laboratory of Information Security, Graduate university of the Chinese Academy of sciences, beijing 100049, china 3 School of science, beijing university of Posts and Telecommunications, beijing 100876, china college of Computer science and technology Beijing University of Technology Beijing China State Key Laboratory of Information Security Graduate University of the Chinese Academy of Sciences Beijing China School of science Beijing University of Posts and Telecommunications Beijing China

A quasi-secure quantum dialogue protocol using single photons was proposed. Different from the previous entanglement-based protocols, the present protocol uses batches of single photons which run back and forth between the two parties. A round run for each photon makes the two parties each obtain a classical bit of information. So the efficiency of information transmission can be increased. The present scheme is practical and well within the present-day technology.

关键词： quantum dialogue, single photon, quantum secure direct communication

Evaluation of genetic diversity and relationships within and between two breeds of duck based on microsatellite markers

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Progress in Natural science:Materials International 2009年第11期19卷 1581-1586页

作者： Fei Wu~a,Yinghua Huang~a,Ying Ma~b,Shengqiang Hu~c,Jinping Hao~c,Ning Li~a a State Key Laboratory for Agrobiotechnology,china agricultural university,beijing 100193,china b college of animal science and Veterinary science,Inner Mongolia agricultural university,Hohhot 010018,china c Gold Star Duck Production Ltd.,beijing 100076,china State Key Laboratory for Agrobiotechnology China Agricultural University Beijing 100193 China college of animal science and Veterinary science Inner Mongolia Agricultural University Hohhot 010018 China Gold Star Duck Production Ltd. Beijing 100076 China

The genetic diversity of two natural populations(M,N) of beijing duck(Anas platyrhynchos) and 11 artificially selected lines of beijing duck(A,B,E-L,O) from china Gold Star Duck Production Ltd.,along with two Cherry Valley duck lines(C and D) from the British Cherry Valley Livestock Division,was evaluated using 18 microsatellite markers covering 16 linkage groups.A phylogenetic tree of the 15 populations of duck,formed of four main branches,was constructed from Nei’s DAgenetic *** mean genetic differentiation index(FST) in all loci,Nei’s standard genetic distance(Ds),and the genetic distance DAbetween the beijing duck and the Cherry Valley duck were 0.075,0.143 and 0.142,*** results demonstrated a high degree of genetic similarity between the two breeds and supported the hypothesis that the Cherry Valley duck was derived from the beijing *** FSTmatrix of seven clusters of beijing duck suggested that the efficiency of selection was not significant to some extent and should be supplemented by marker -assisted selection.

关键词： Duck Microsatellite marker Genetic diversity Genetic distance

Cloning and Identification of Porcine SMPX Differentially Expressed in F1 Crossbreds and Their Parents

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Acta Biochimica et Biophysica Sinica 2006年第11期38卷 753-758页

作者： Zhu-Qing REN Yuan-Zhu XIONG* Chang-Yan DENG Ming-Gang LEI agricultural Ministry Key Laboratory of Swine Breeding and Genetics,college of animal science and technology,Huazhong agricultural university,Wuhan 430070,china agricultural Ministry Key Laboratory of Swine Breeding and Genetics College of Animal Science and Technology Huazhong Agricultural UniversityWuhan 430070 China

In order to investigate porcine heterosis on the molecular basis,Large White (L),a Europeanpurebred,and Meishan (M),a Chinese indigenous purebred,were hybridized directly and reciprocally toproduce F1 hybrids,Large White×Meishan (LM) and Meishan×Large White (ML) *** mRNAdifferential display,we found an expression sequence tag (EST) differentially expressed in F1 hybrids andtheir parents,designated as EST55,which was homologous to human and murine skeletal muscle protein(SMPX),and the full-length cDNA of porcine SMPX was cloned by the rapid amplification of cDNA end(RACE) *** of the mRNA transcript revealed an open reading frame (ORF) of 86 aminoacid residues encoding a nuclear location signal peptide,two overlapping casein kinase Ⅱ phosphorylationsites and one N-glycosylation site with theoretical molecular weight of 9.3 *** analysis revealedthat the deduced protein sequence shared 94%,83% and 78% homology with that of its human,mouse andrat counterparts,*** transcription-polymerase chain reaction (RT-PCR) analysis showedthat it was expressed predominantly in skeletal and heart muscles,whereas at a moderate level in backfat,spleen,stomach and uterus *** single nucleotide polymorphism (SNPs),located in 5′- and 3′-untranslated region (UTR),respectively,were identified by PCR and *** tree and thesecondary structure prediction were also *** possible relationship between porcine SMPX andheterosis was discussed.

关键词： skeletal muscle protein pig mRNA differential display expression pattern

Synchronization of Digital Chaos in Secure Communication Systems

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Journal of university of science and technology beijing 2001年第4期8卷 299-305页

作者： Geng Zhao, Deling Zheng, ShaojunHuang 1)college of Electric science and technology beijing. beijing 100070, china 2)Information Engineering School, university of science and technology beijing. beijing 100083, china college of Electric science and technology beijing Beijing 100070 China Information Engineering School University of Science and Technology Beijing Beijing 100083 China

The theories of synchronization based on secure communications using digital chaos are presented. A new synchronous method-cycles-interval Pulse drive is developed and realized. Experimental results show it is available, and in order to reduce synchronous noise, a method using model references solves the ratio of signal power to noise power, so the secure communication system can be realized.

关键词： digital chaotic synchronization cycles-interval pulses drive synchronous noise model reference

Production of porcine cloned transgenic embryos expressing green fluorescent protein by somatic cell nuclear transfer

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science china(Life sciences) 2006年第2期49卷 164-171页

作者： ZHANG Yunhai1, PAN Dengke1,2, SUN Xiuzhu1, SUN Guojie1, WANG Xiaobo1, LIU Xiaohui1, LI Yan1, DAI Yunping1 & LI Ning1 1. State Key Laboratory for Agrobiotechnology, china agricultural university, beijing 100094, china 2. college of animal science and technology, china agricultural university, beijing 100094, china State Key Laboratory for Agrobiotechnology China Agricultural University Beijing China college of animal science and technology China Agricultural University Beijing China

In the present study, nuclear transferred embryos (NTEs) were reconstructed by using pig fetal fibroblasts as donors; in vitro matured oocytes as recipients. The effects of G418 selection on donor cells, duration of IVM of prepubertal gilt oocytes; oxygen tension in IVM of oocytes were investigated. The results were as follows: (i) When G418 selected cells expressing GFP were used as donors, the cleavage rate of NTEs decreased drastically in comparison to NTEs derived from donors without antibiotic selection (47.5% vs. 71.6%, p>0.05). For the blastocyst rate, no significant difference was observed between two groups (10% vs. 10.4%, p36 to 42 h (83.6% vs. 96.7%, p>0.05). However, no statistical difference was observed between NTEs derived from oocytes of 36 h IVM group; NTEs from oocytes of 42 h IVM group in the rates of cleavage (59.3% vs. 73.6%, p3% vs. 13.2%, p3%, p36 to 42 h, while no significant differences were observed for developmental potential of transgenic embryos. Thus IVM 42 h is the better choice in order to obtain maximum number of MII oocytes as recipients. (iii) Lower oxygen tension; higher oxygen tension in IVM have no significant effect on development of cloned embryos.

关键词： transgenic cloning, GFP, Pig, early development.

Design and Expression of a Synthetic phyC Gene Encoding the Neutral Phytase in Pichia pastoris

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Acta Biochimica et Biophysica Sinica 2006年第11期38卷 803-811页

作者： Li-Kou ZOU~(1,3) Hong-Ning WANG~(2,1*) Xin PAN~4 Tao XIE~1 Qi WU~5 Zi-Wen XIE~1 Wan-Rong ZHOU~1 1 Laboratory of Veterinary and Biotechnology,Sichuan agricultural university,Ya'an 625014,china 2 Sichuan university Bioengineering Research Center for animal Disease Prevention and Control,Chengdu 610065,china 3 Faculty of Environment and Resource of Dujiangyan Campus,Sichuan agricultural university,Dujiangyan 611830,china 4 college of Earth science,Chengd university of technology,Chengdu 610059,china 5 college of Life science,Sichuan agricultural university,Ya'an 625014,china Laboratory of Veterinary and Biotechnology Sichuan Agricultural University Ya'an 625014 China

The 1074-bp phyCs gene （optimized phyC gene） encoding neutral phytase was designed andsynthesized according to the methylotrophic yeast Pichia pastoris codon usage bias without altering theprotein *** expression vector,pP9K-phyCs,was linearized and transformed in *** of total extracellular phytase activity was 17.6 U/ml induced in Buffered Methanol-complex Medium（BMMY） and 18.5 U/ml in Wheat Bran Extract Induction （WBEI） medium at the flask scale,respectively,improving over 90 folds compared with the wild-type *** enzyme showed temperature optimumof 70℃ and pH optimum of *** enzyme activity retained 97% of the relative activity afterincubation at 80℃ for 5 *** of the heavy glycosylation the expressed phytase had a molecularsize of approximately 51 *** deglycosylation by endoglycosylase H （EndoH_f）,the enzyme had anapparent molecular size of 42 *** property and thermostability was affected by the glycosylation.

关键词： design expression synthetic phyC gene neutral phytase Pichia pastoris

Epistatic effect between ACACA and FABP2 gene on abdominal fat traits in broilers

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Journal of Genetics and Genomics 2010年第8期37卷 505-512页

作者： Guo Hu 1, Shouzhi Wang 1, Jianwei Tian, Lili Chu, Hui Li college of animal science and technology, Northeast agricultural university, Harbin 150030, china college of animal science and technology Northeast Agricultural University Harbin 150030 China

Epistasis is generally defined as the interaction between two or more genes or their mRNA or protein products to influence a single trait. Experimental evidence suggested that epistasis could be important in the determination of the genetic architecture of complex traits in domestic animals. Acetyl-coenzyme A carboxylase alpha （ACACA） and fatty acid binding protein 2 （FABP2） are both key factors of lipogenesis and transport. They may play a crucial role in the weight variability of abdominal adipose tissue in the growing chicken. In this study, the polymorphisms of c.2292G〉A in A CA CA and c.-561A〉C in FABP2 were detected among individuals from two broiler lines which were divergently selected for abdominal fat content. Epistasis between the two SNPs on abdominal fat weight （AFW） and ab- dominal fat percentage （AFP） was analyzed. The additive x additive epistatic components between these two SNPs were found significant or suggestively significant on both AFW and AFP in lean lines of the 9th and 10th generation; whereas, it was not significantly associated with either AFW or AFP in fat lines. At the same time, there were not any other significant epistatic components found in both generations or in both lines. Significant epistatic effects between these two SNPs found only in the lean lines could partly be due to the fact that the abdominal fat traits in these two experimental lines have been greatly modified by strong artificial selection. The results suggested that the epistasis mode may be different between the lean and fat chicken lines. Our results could be helpful in further understanding the genetic interaction between candidate genes contributing to phenotypic variation of abdominal fat content in broilers.

关键词： chicken fatness epistasis ACACA FABP2 QTL

Fuzzy tolerance quotient spaces and fuzzy subsets

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science china(Information sciences) 2010年第4期53卷 704-714页

作者： ZHANG Ling1 & ZHANG Bo2,3,4* 1Computer science & technology college, Anhui university, Anhui 230039, china 2State Key Laboratory of Intelligent technology and Systems, beijing 100084, china 3Tsinghua National Laboratory of Information science & technology, beijing 100084, china 4Information science & technology college, Computer science & technology Department, Tsinghua university, beijing 100084, china Computer science & technology college Anhui University Anhui China State Key Laboratory of Intelligent technology and Systems Beijing China Tsinghua National Laboratory of Information science & technology Beijing China Information science & technology college Computer Science & Technology Department Tsinghua University Beijing China

The structure and characteristic of fuzzy subsets are discussed by using the concepts of granulation and hierarchy in quotient space theory. First, the equivalence relation based quotient space theory is extended to the fuzzy tolerance relation. Second, the isomorphism and its discriminant of fuzzy tolerance relations are discussed. Finally, by using the fuzzy tolerance relation to define the fuzzy subset, its properties are addressed. The main results are given below: (1) several equivalent statements of fuzzy tolerance relations; (2) the definition of isomorphism of fuzzy tolerance relations; (3) the isomorphic discriminant of fuzzy tolerance relations; (4) the definition and properties of fuzzy subsets based on the fuzzy tolerance relations; and (5) the necessary and sufficient condition of the isomorphism of fuzzy subsets. These results will help us further comprehend the concepts of fuzzy tolerance relations and fuzzy subsets.

关键词： Fuzzy tolerance relation quotient space isomorphism fuzzy subset

Decisive influence of the ionization strength of cosmic rays on the cavitation characteristics of pure water

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science china(Technological sciences) 2009年第6期52卷 1804-1808页

作者： CHANG JinShi college of Water Conservancy & Civil Engineering,china agricultural university,beijing 100083,china college of Water Conservancy & Civil Engineering China Agricultural University

The experiment result in this article shows that the initial and critical cavitation pressure of pure water are both increasing along with the increase of height above sea level,and the ionization strength of cosmic rays in the lower aerosphere is the crucial factor which influences the cavitation pressure of pure *** author concludes the relationship between the cavitaion pressure of pure water and the height above sea ***,air particles in water caused by the radiation of cosmic rays can exist in the water for a long time and will not escape.

关键词： initial cavitaiton pressure critical cavitation pressure ionization strength of cosmic rays height above sea level