期刊文献+
共找到33篇文章
< 1 2 >
每页显示 20 50 100
自旋因式化法推求同科电子组态原子光谱项 被引量:1
1
作者 骆定法 郭鉴 +1 位作者 刘雪 李小娜 《光谱实验室》 CAS CSCD 2007年第2期153-156,共4页
以同科电子i3组态光谱项推求为例,提出了用自旋因式化方法推求同科电子光谱项的一般方法。该法较为简单、适用,易于推广,可求出任一基态或激发态原子或离子光谱项。
关键词 自旋因式化 同科电子组态 原子光谱项 半微状态
下载PDF
自旋因式化法推求等价组态j-j耦合原子光谱项 被引量:1
2
作者 张秀利 韩琦 《光谱实验室》 CAS CSCD 1997年第4期16-19,共4页
本文提出了推求等价组态j-j耦合原子光谱项的新方法——自旋因式化法。该法计算过程简单,易于掌握.
关键词 原子光谱项 等价组态 J-J耦合 自旋因式化
下载PDF
推求j-j耦合谱项的一种新方法──因式化法 被引量:2
3
作者 赵森 武风林 +1 位作者 党占青 马建峰 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 1996年第1期29-34,共6页
推求j-j耦合谱项对于研究重核原子的结构和光谱十分重要,但用人工方法推算其谱项困难很大。其难点和关键在于推算组合组态[(j)n]J的J值。我们采用一种新的方法“因式化法”解决了这一难题。该法利用结构化的TRUEBAS... 推求j-j耦合谱项对于研究重核原子的结构和光谱十分重要,但用人工方法推算其谱项困难很大。其难点和关键在于推算组合组态[(j)n]J的J值。我们采用一种新的方法“因式化法”解决了这一难题。该法利用结构化的TRUEBASIC语言编制了计算程序,并在PC-386DX微机上通过。利用本程序可快速、准确、清晰地推算各种等效电子组态j-j耦合谱项的J值。同时在程序中对计算结果进行了验证。 展开更多
关键词 因式化 等效组态 j-j耦合谱项 组合组态
下载PDF
因式化方法和可解Hamilton量的又一新系列
4
作者 毛克非 黄惟承 《新疆大学学报(自然科学版)》 CAS 1989年第3期44-47,共4页
我们利用因式化方法找到了可解 Hamilton 量的又一新系列,其本征值谱相同而本征态有简单关系,从而为寻找新的可解势提供了又一途径.并给出了两个实例.
关键词 因式化 可解势 HAMILTON量
下载PDF
由因式化L算子所构成的经典可积动力学体系
5
作者 石康杰 李广良 +1 位作者 范桁 侯伯宇 《高能物理与核物理》 CSCD 北大核心 1998年第12期1100-1111,共12页
用因式化的L算子构造了一类在非周期边界条件下的可积模型.对体系的transfer矩阵取三角和标度极限情况下,得到了n维体系(n为奇数)的经典哈密顿量的具体形式.结果表明,这类可积体系与Calogero等人所发现的一系列可积体系是相类似的.
关键词 因式化L算子 非周期边界 可积动力学体系
原文传递
利用因式化纠缠模拟纠缠动力学行为的有效性研究
6
作者 霍雅静 李军刚 《物理学报》 SCIE EI CAS CSCD 北大核心 2012年第21期50-56,共7页
研宄了非马尔可夫噪声环境影响下两个量子比特纠缠的动力学行为.对比讨论了因式化纠缠在描述纠缠动力学演化的有效性.结果表明:对于贝尔态、最大纠缠混合态等特殊初态,当噪声环境的影响比较弱时,利用纠缠的因式化分解形式可以有效地刻... 研宄了非马尔可夫噪声环境影响下两个量子比特纠缠的动力学行为.对比讨论了因式化纠缠在描述纠缠动力学演化的有效性.结果表明:对于贝尔态、最大纠缠混合态等特殊初态,当噪声环境的影响比较弱时,利用纠缠的因式化分解形式可以有效地刻画纠缠的动力学演化;对于一般初态的情况,当系统的纠缠比较大,噪声环境的影响比较弱时,纠缠的因式化分解形式也可以有效地刻画纠缠的动力学演化. 展开更多
关键词 量子纠缠 最大纠缠混合态 因式化纠缠
原文传递
基于LT码的分布式矩阵计算研究
7
作者 刘怡 张磊 《计算机工程》 CAS CSCD 北大核心 2024年第8期328-335,共8页
在如今大数据和机器学习应用范围不断扩大的背景下,分布式计算系统成为处理庞大数据的必要工具。对于具有一定规模的计算集群,其性能会不可避免地受到系统噪声的影响,应考虑在分布式计算系统中借助编码技术来增强系统的鲁棒性。现有应... 在如今大数据和机器学习应用范围不断扩大的背景下,分布式计算系统成为处理庞大数据的必要工具。对于具有一定规模的计算集群,其性能会不可避免地受到系统噪声的影响,应考虑在分布式计算系统中借助编码技术来增强系统的鲁棒性。现有应用于分布式矩阵计算的编码方案多为固定速率编码,无法适应节点数量动态变化的实际情况。同时,由于部分任务有截止期限制,应在保证任务顺利完成的前提下尽可能地减少平均开销从而降低时延。针对上述问题,提出将LT码应用于雾计算场景下的分布式矩阵计算,设计Remo2算法。依托LT码的无速率特性自适应信道状态变化,通过合适的度分布函数设计以及双向切割、因子化度数的方法达到降低时延、增强分布式计算系统鲁棒性的预期效果。令k_(1)为A矩阵被切分后的子矩阵行值,k_(2)为B矩阵被切分后的子矩阵列值,实验结果表明,在k_(1)值固定的前置条件下,与FLT码及BDC-LT算法相比,Remo2算法的平均开销相对于前者稳定降低了33.3%,相对于后者减少了7.7%的冗余。此外,当k_(1)k_(2)大小的码长固定时,k_(1)、k_(2)的离散化程度越低,即limk_(1)-k_(2)→0,会带来更小的平均开销。 展开更多
关键词 LT码 分布式矩阵计算 双向切割 因式化 平均开销
下载PDF
等价电子组态nl^N光谱项的推求法
8
作者 刘雪 骆定法 +1 位作者 朱德忠 贺媛 《聊城师院学报(自然科学版)》 2001年第1期61-65,104,共6页
从等价电子组态的“自旋因式化”出发 ,导出了 ns N~ nh N 组态的 Lα、Lβ取值规则 。
关键词 等价电子 组态 “自旋因式化 取值规则 原子能级 原子结构 原子光谱项 推求法
下载PDF
B介子衰变的微扰理论
9
作者 李湘楠 《科技导报》 CAS CSCD 2004年第11期12-15,共4页
B介子工厂产生大量的实验数据,引起B介子衰变理论研究的热潮,简单扼要地介绍该领域的最近发展———涵盖“经量子色动力学改良的因式化方法”、“微扰量子色动力学方法”和“软-共线等效场论”,对这些理论的基本假设、衰变机制的处理以... B介子工厂产生大量的实验数据,引起B介子衰变理论研究的热潮,简单扼要地介绍该领域的最近发展———涵盖“经量子色动力学改良的因式化方法”、“微扰量子色动力学方法”和“软-共线等效场论”,对这些理论的基本假设、衰变机制的处理以及唯象学上的预测做一比较。 展开更多
关键词 B介子衰变 微扰理论 粒子物理学 经量子色动力学 因式化方法 微扰量子色动力学方法 轻-共线等效场论 衰变机制
下载PDF
推引强场配合物中心离子配位场谱项的快速方法
10
作者 任小明 《安庆师范学院学报(自然科学版)》 1996年第1期30-31,共2页
用自旋因式化方法,快速推导引强场(O场)配位场组态的配位场谱项。该方法也适用于其它对称性的配位场组态。
关键词 自旋因式化 配位场谱项 配合物 中心离子
下载PDF
Photosynthetic Characteristics of Transgenic Rice Plants Overexpressing Maize Phosphoenopyruvate Carboxylase 被引量:10
11
作者 迟伟 焦德茂 +3 位作者 黄雪清 李霞 匡廷云 KuS.B.MAURICE 《Acta Botanica Sinica》 CSCD 2001年第6期657-660,共4页
用转PEPC、PPDK、NADP_ME、PEPC +PPDK 双基因水稻 (OryzasativaL .)及原种为材料 ,以光合酶活性、饱和光合速率及PSⅡ光化学效率 (Fv/Fm)为指标 ,研究了转PEPC基因水稻的光合生理特征。结果如下 :转PEPC基因水稻PEPC活性比原种提高 2 ... 用转PEPC、PPDK、NADP_ME、PEPC +PPDK 双基因水稻 (OryzasativaL .)及原种为材料 ,以光合酶活性、饱和光合速率及PSⅡ光化学效率 (Fv/Fm)为指标 ,研究了转PEPC基因水稻的光合生理特征。结果如下 :转PEPC基因水稻PEPC活性比原种提高 2 0倍 ;饱和光合速率比原种高 5 5 % ;用高光强或人工光氧化剂甲基紫精 (MV)处理后 ,与原种相比 ,转PEPC基因水稻光化学效率下降较少 ,证明其耐光抑制、耐光氧化能力增强 ,测定其光合日变化看出 :在 1d中不同时间 ,转PEPC基因水稻的光合速率均高于原种 ,且与PEPC活性的日变化有相似的趋势。上述结果为转PEPC基因水稻的生理机制和育种研究提供了依据和途径。 展开更多
关键词 transgenic rice plant phosphoenopyruvate carboxylase (PEPC) PHOTOINHIBITION PHOTOOXIDATION diurnal change of photosynthesis
下载PDF
Characteristics of CO_2 Exchange and Chlorophyll Fluorescence of Transgenic Rice with C_4 Genes 被引量:13
12
作者 黄雪清 焦德茂 +1 位作者 迟伟 古森本 《Acta Botanica Sinica》 CSCD 2002年第4期405-412,共8页
The responses of photosynthesis of phosphoenopyruvate carboxylase (PEPC), pyrurate dikinase (PPDK), NADP-malic enzyme (NADP-ME) and PPDK+PEPC transgenic rice (Oryza saltiva L.) plant to light, temperature, CO 2 and t... The responses of photosynthesis of phosphoenopyruvate carboxylase (PEPC), pyrurate dikinase (PPDK), NADP-malic enzyme (NADP-ME) and PPDK+PEPC transgenic rice (Oryza saltiva L.) plant to light, temperature, CO 2 and the characteristics of chlorophyll fluorescence under photoinhibition conditions were studied. The results were as follows: 1. The light-saturated photosynthetic rates of transgenic rice plants were higher than that of wild type, in which the light-saturated point of PEPC and PPDK+PEPC transgenic rice plants was 200 μmol·m -2·s -1 higher than that of untransformed rice and the light-saturated photosynthetic rates were 51.6% and 58.5% respectively. The carboxylation efficiency of PEPC transgenic rice plant increased by 49.3% and the CO 2 compensation point decreased by 26.2% than that of untransformed rice. Under high temperature (35 ℃), the photosynthetic rate of PEPC transgenic rice plant was higher over 17.5% than that of untransformed rice. 2. On the 8th day after photoinhibition treatment, the PSⅡ photochemical efficiency (F v/F m) and photochemical quenching (qP) of PEPC and PPDK+PEPC transgenic rice plants decreased by about 20%-30% while the non-photochemical quenching (qN) increased by approximately 30%. But F v/F m and qP of untransformed rice decreased by over 50% while qN increased by less than 10%. The result suggested that transgenic rice plants were more tolerant to photoinhibition. 展开更多
关键词 transgenic rice phosphoenopyruvate carboxylase (PEPC) pyruvate Pi dikinase (PPDK) photoinhibition of photosynthesis chlorophyll fluorescence
下载PDF
Expansion of the Actin Gene Family in Amphioxus
13
作者 魏云虎 张煜珺 +1 位作者 陈源 毛炳宇 《Zoological Research》 CAS CSCD 北大核心 2009年第5期473-479,共7页
Actins are a small family of ubiquitous proteins that are essential cytoskeletal components and are highly conserved during evolution. Actins are usually divided into two classes, the cytoplasmic and muscle actins, wh... Actins are a small family of ubiquitous proteins that are essential cytoskeletal components and are highly conserved during evolution. Actins are usually divided into two classes, the cytoplasmic and muscle actins, which have different functional roles. Here we systematically analyzed the actin genes in the genome of the primitive chordate amphioxus (Branchiostoma floridae). We found that amphioxus contains more than 30 actin genes, many of which are linked. Phylogenetic analysis suggests the amphioxus actin genes have clearly undergone extensive expansion through tandem duplications. The actin genes' structure also varies a lot, containing 2 to 7 exons. We also cloned two muscle type of actin genes from the amphioxus (B. belcheri) and compared their expression patterns during early development. The slight difference in their expression suggests functional diversification of these actin genes. Our results shed light on the evolution both of actin genes themselves and their functional roles in chordate development. 展开更多
关键词 AMPHIOXUS ACTIN Gene family EVOLUTION Expression pattern
下载PDF
Expression patterns of transforming growth factor-beta and its receptors in gastric mucosa of patients with refractory gastric ulcer 被引量:4
14
作者 Shou-Chuan Shih Kwang-Wen Tseng +7 位作者 Shee-Chan Lin Chin-Roa Kao Sun-Yen Chou Horng-Yuan Wang Wen-Hsiung Chang Cheng-Hsin Chu Tsang-En Wang Chung-Liang Chien 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第1期136-141,共6页
AIM: Transforming growth factor-β (TGF-β) plays a regulatory role in tissue repair. In a previous study, we found that TGF-β and its receptors were expressed in gastric mucosa of patients with well-healed gastric u... AIM: Transforming growth factor-β (TGF-β) plays a regulatory role in tissue repair. In a previous study, we found that TGF-β and its receptors were expressed in gastric mucosa of patients with well-healed gastric ulcers, as demonstrated by immunohistochemistry. To further characterize the role of TGF-β and its receptors in repairing gastric ulcers, we investigated the expression patterns of TGF-β and its receptors in gastric mucosa by in situ hybridization and reverse transcriptase-polymerase chain reaction (RT-PCR).METHODS: Seventy-four patients with endoscopically proven gastric ulcers were eligible for participation in this study. All patients had routine biopsies on initial endoscopy and were then treated for 12 wk with an H2 blocker. Repeat endoscopy was then performed. There were 8 patients with poorly healed ulcers, and biopsies were taken from the margin of the residual ulcers. These tissue samples, along with biopsy of gastric mucosa near the original ulcers from 8 randomly selected patients with well-healed ulcers were examined for TGF-β and TGF-β receptor Ⅱ mRNA by RT-PCR and in situ hybridization, as well as immunohistochemistry.RESULTS: TGF-β and TGF-β receptor Ⅱ were strongly expressed in tissues from patients with well-healed ulcers.Four of the 8 patients with poor healing had low or absent expression of TGF-β or TGF-β receptor Ⅱ mRNA. All cases positive by RT-PCR assay were confirmed by in situ hybridization as well as immunohistochemistry.CONCLUSION: It is suggested that TGF-β and its receptors are important for gastric ulcer healing. These results may have implications for further investigation of the healing process and in predicting response to therapy. 展开更多
关键词 Gastric Ulcer Transforming growth factor-beta Transforming growth factor-beta receptor
下载PDF
Optimization Research into Addition Method and Proportion Formula of Rabbit Meat Sausages Fermentation Agent
15
作者 DONG Jie JIANG Yunsheng +2 位作者 ZHANG Wenjuan ZHANG Wujin LIU Yufeng 《Chinese Food Science》 2012年第3期20-22,共3页
[Objective] Sausage making using fermentation agents including Staphylococcus xylosus(C18), Lactobacillus plantarum(L26), and Debaryomyces Hansenula(Y163). [Method] With adoption of preliminary experiments and single ... [Objective] Sausage making using fermentation agents including Staphylococcus xylosus(C18), Lactobacillus plantarum(L26), and Debaryomyces Hansenula(Y163). [Method] With adoption of preliminary experiments and single factor experiment, we measured production pH, and in combination with sensory analysis, we managed to evaluate the fermentation agents, addition method, and addition proportion formula. [Conclusion] At total inoculation of 1×107 cfu/g, and with processing method of simultaneous addition, the optimal addition proportion is L:C:Y =1:2:1. 展开更多
关键词 Fermentation agents Fermentation sausages pH value Sensory evaluation China
下载PDF
Expression Pattern of Peptide and Amino Acid Genes in Digestive Tract of Transporter Juvenile Turbot(Scophthalmus maximus L.) 被引量:3
16
作者 XU Dandan HE Gen +3 位作者 MAI Kangsen ZHOU Huihui XU Wei SONG Fei 《Journal of Ocean University of China》 SCIE CAS 2016年第2期334-340,共7页
Turbot(Scophthalmus maximus L.),a carnivorous fish species with high dietary protein requirement,was chosen to examine the expression pattern of peptide and amino acid transporter genes along its digestive tract which... Turbot(Scophthalmus maximus L.),a carnivorous fish species with high dietary protein requirement,was chosen to examine the expression pattern of peptide and amino acid transporter genes along its digestive tract which was divided into six segments including stomach,pyloric caeca,rectum,and three equal parts of the remainder of the intestine.The results showed that the expression of two peptide and eleven amino acid transporters genes exhibited distinct patterns.Peptide transporter 1(Pep T1) was rich in proximal intestine while peptide transporter 2(PepT2) was abundant in distal intestine.A number of neutral and cationic amino acid transporters expressed richly in whole intestine including B^0-type amino acid transporter 1(B^0AT1),L-type amino acid transporter 2(LAT2),T-type amino acid transporter 1(TAT1),proton-coupled amino acid transporter 1(PAT1),y^+L-type amino acid transporter 1(y^+LAT1),and cationic amino acid transporter 2(CAT2) while ASC amino acid transporter 2(ASCT2),sodium-coupled neutral amino acid transporter 2(SNAT2),and y^+L-type amino acid transporter 2(y^+LAT2) abundantly expressed in stomach.In addition,system b^(0,+) transporters(rBAT and b^(0,+)AT) existed richly in distal intestine.These findings comprehensively characterized the distribution of solute carrier family proteins,which revealed the relative importance of peptide and amino acid absorption through luminal membrane.Our findings are helpful to understand the mechanism of the utilization of dietary protein in fish with a short digestive tract. 展开更多
关键词 TURBOT digestive tract amino acid PEPTIDE TRANSPORTER expression pattern
下载PDF
Research on purification and modification of I/S bentonite
17
作者 Deli YU Shufeng LIU +1 位作者 Liyu TIAN Peiping ZHANG 《Global Geology》 2008年第3期188-190,共3页
Analyzing raw material's structure and performance of bentonite from Panzhihua in Sichuan, the authors think that it is adequate for agglomerant of iron smelting. According to its composition and property we have res... Analyzing raw material's structure and performance of bentonite from Panzhihua in Sichuan, the authors think that it is adequate for agglomerant of iron smelting. According to its composition and property we have researched the purification and modification of I/S bentonite under conditions of different dispersants and sodium agent. XRD test result reveals that the essential minerals of Panzhihua bentonite are I/S mixed-layer ones, and FTIR analysis shows that when adding 1.5% sodium pyrophosphate to the bentonite slurry during purification, the composition of quartz in bentonite decreases to less than 4% and I/S is more than 90%. The optimized modification technic conditions are Na2CO3 (4%) and CMC-Na (3%) as modified agents, the clay and water are 10 vs. 1, and the temperature is 75℃. It is 40 min for stirring time and reacting time is 4 h. Under the conditions we can get the modified I/S bentonite with colloid index more than 500 nd/15 g. 展开更多
关键词 I/S bentonite PURIFICATION MODIFICATION
下载PDF
B→a_0(1450)ρ(ω) Decays in Perturbative QCD Approach
18
作者 张志清 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第12期1063-1070,共8页
In the two-quark model supposition for the meson ao(1450), which can be viewed as either the first excited state (scenario I) or the lowest lying state (scenario II), the branching ratios and the direct CP-viola... In the two-quark model supposition for the meson ao(1450), which can be viewed as either the first excited state (scenario I) or the lowest lying state (scenario II), the branching ratios and the direct CP-violating asymmetries for decays B→a0(1450)ρ(ω) are studied by employing the perturbative QCD factorization approach. We find the following results: (a) For the decays B- B→a0(1450)ρ- andB→a0^+(1450)ρ^-, their branching ratios have large difference between two scenarios. Although their branching ratios are larger than other considered decay modes, their direct CP-violating asymmetries in both scenarios are small. (b) For the decays B-→a0^-(1450)ρ0 and B0→ a0(1450)ρ+, a0^0(1450)ρ0, a00 (1450)w, their branching ratios are dose to each other between two scenarios, respectively. (c) Comparing with the decays a0^0(1450)ρ0,π0ρ0 π0π0, the decay B-→a0^-(1450)ρ0 receives a larger branching ratio in each scenario, which is sensitive to the variation of the Cabibbo-Kobayashi-Maskawa angle α. 展开更多
关键词 DECAY scalar meson perturbative QCD branching ratio CP-asymmetry
下载PDF
Synthesis of biodegradable Mg-Zn alloy by mechanical alloying: Statistical prediction of elastic modulus and mass loss using fractional factorial design
19
作者 Emee Marina SALLEH Zuhailawati HUSSAIN Sivakumar RAMAKRISHNAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第4期687-699,共13页
Biodegradable Mg-Zn alloy was synthesized using mechanical alloying where a statistical model was developed using fractional factorial design to predict elastic modulus and mass loss of the bulk alloy.The effects of m... Biodegradable Mg-Zn alloy was synthesized using mechanical alloying where a statistical model was developed using fractional factorial design to predict elastic modulus and mass loss of the bulk alloy.The effects of mechanical alloying parameters(i.e.,milling time,milling speed,ball-to-powder mass ratio and Zn content)and their interactions were investigated involving 4 numerical factors with 2 replicates,thus 16 runs of two-level fractional factorial design.Results of analysis of variance(ANOVA),regression analysis and R2 test indicated good accuracy of the model.The statistical model determined that the elastic modulus of biodegradable Mg-Zn alloy was between 40.18 and 47.88 GPa,which was improved and resembled that of natural bone(30-57 GPa).Corrosion resistance(mass loss of pure Mg,33.74 mg)was enhanced with addition of 3%-10%Zn(between 9.32 and 15.38 mg).The most significant independent variable was Zn content,and only the interaction of milling time and ball-to-powder mass ratio was significant as P-value was less than 0.05.Interestingly,mechanical properties(represented by elastic modulus)and corrosion resistance(represented by mass loss)of biodegradable Mg-Zn alloy can be statistically predicted according to the developed models. 展开更多
关键词 biodegradable Mg-Zn alloy mechanical alloying fractional factorial design elastic modulus mass loss
下载PDF
Preliminary analysis of the mitochondrial genome evolutionary pattern in primates
20
作者 Liang ZHAO Xingtao ZHANG +2 位作者 Xingkui TAO Weiwei WANG Ming LI 《Zoological Research》 CAS CSCD 北大核心 2012年第4期I0019-I0028,共10页
Since the birth of molecular evolutionary analysis, primates have been a central focus of study and mitochondrial DNA is well suited to these endeavors because of its unique features. Surprisingly, to date no comprehe... Since the birth of molecular evolutionary analysis, primates have been a central focus of study and mitochondrial DNA is well suited to these endeavors because of its unique features. Surprisingly, to date no comprehensive evaluation of the nucleotide substitution patterns has been conducted on the mitochondrial genome of primates. Here, we analyzed the evolutionary patterns and evaluated selection and recombination in the mitochondrial genomes of 44 Primates species downloaded from Genl3ank. The results revealed that a strong rate heterogeneity occurred among sites and genes in all comparisons. Likewise, an obvious decline in primate nucleotide diversity was noted in the subunit rRNAs and tRNAs as compared to the protein-coding genes. Within 13 protein-coding genes, the pattern of nonsynonymous divergence was similar to that of overall nucleotide divergence, while synonymous changes differed only for individual genes, indicating that the rate heterogeneity may result from the rate of change at nonsynonymous sites. Codon usage analysis revealed that there was intermediate codon usage bias in primate protein-coding genes, and supported the idea that GC mutation pressure might determine codon usage and that positive selection is not the driving force for the codon usage bias. Neutrality tests using site-specific positive selection from a Bayesian framework indicated no sites were under positive selection for any gene, consistent with near neutrality. Recombination tests based on the pairwise homoplasy test statistic supported complete linkage even for much older divergent primate species. Thus, with the exception of rate heterogeneity among mitochondrial genes, evaluating the validity assumed complete linkage and selective neutrality in primates prior to phylogenetic or phylogeographic analysis seems unnecessary. 展开更多
关键词 Mitochondrial genome Evolutionary pattem Codon usage bias Complete linkage Evolution neutrality PRIMATES
下载PDF
上一页 1 2 下一页 到第
使用帮助 返回顶部