基于GPS实时数据的在线过滤与补遗研究*

为提高GPS数据的有效性与可靠性,使之为实现实时交通流量预测与交通诱导服务,首先基于GPS历史数据,以变异系数极小化为优化目标进行GPS数据过滤模型的优选,并对实时数据缺损提出两种补遗算法;然后给出基于动态GPS实时数据的在线数据过滤与补遗一体化算法;最后结合2008年杭州市GPS历史数据对模型进行应用。结果表明,基于简单算术平均的滤波模型即为GPS数据过滤的最佳模型;基于时间序列缺失数据的快速补遗算法能够很好地满足实时预报要求,实现快速补遗。     

梳棉机针布选配与工艺优化

探讨了梳棉机针布选配和工艺参数的选择问题。通过工艺对比得出,纺C14.6 tex棉纱时针布选配应按照锡林针布稀、盖板针布密的原则进行。在生条定量3.9 g/m、刺辊速度970 r/min、锡林速度403 r/min工艺条件下,有利于进一步提高成纱质量。     

考虑电-氢-热多能互补的微网多目标优化配置研究

氢储能具有储能容量大、储存时间长、清洁无污染、实现多种能源网络互联互补和协同优化等诸多优点,有望成为推动分布式能源发展和提升终端能源利用效率的重要支撑技术。为了提高独立型微网供电可靠性及可再生能源利用率,本文建立了考虑电-氢-热多能互补的独立微网多目标优化配置模型,并基于模拟退火的粒子群算法对目标问题进行求解。最后,通过东北某地独立微网优化配置算例,基于MATLAB平台验证了所提多能互补配置方案较传统电储能配置方案负荷失电率降低了3.18%,可再生能源利用率提高了8.37%,所提配置方案可有效促进可再生能源消纳,保证独立微网的供电可靠性。     

A multi-energy inertia-based power support strategy with gas network constraints

An integrated energy system with multiple types of energy can support power shortages caused by the uncertainty of renewable energy. With full consideration of gas network constraints, this paper proposes a multi-energy inertia-based power support strategy. The definition and modelling of gas inertia are given first to demonstrate its ability to mitigate power fluctuations. Since partial utilization of gas inertia can influence overall gas network parameters, the gas network is modelled with an analysis of network dynamic changes. A multi-energy inertia-based power support model and strategy are then proposed for fully using gas-thermal inertia resources in integrated energy systems. The influence of gas network constraints on strategy, economy and power outputs is analyzed. Special circumstances where the gas network can be simplified are introduced. This improves the response speed and application value. The feasibility and effectiveness of the proposed strategy are assessed using a real scenario.     

考虑可平移负荷的综合能源系统动态优化调度策略

综合能源系统因多能互补、协调优化等特性受到了广泛关注,但该系统的热电机组在运行时的调峰能力具有一定局限性。为降低综合能源系统的用能成本,提升系统的用能效率,改善其调峰能力,文中提出了一种考虑可平移负荷的综合能源系统动态优化调度策略。该策略以系统的整体运维成本最小化为目标,结合可平移负荷和相关算例构建仿真模型,并采用自适应混沌粒子群算法进行求解。结果表明在引入可平移负荷时,多能源微网能够较好地达到削峰填谷目的,并降低系统综合运行成本,实现节能减排效果。同时,文中将传统粒子群算法与自适应混沌粒子群算法作比较,证明了自适应混沌粒子群算法在精度与效率上都优于传统的粒子群算法。     

浅谈音乐教学中相关知识的融汇贯通

音乐、文学、美术，从古至今它们之间一直都有着千丝万缕的联系，相互影响，共同发展,利用音画交融，视听互补；通过作词荐曲，学科互补，可提高音乐教学质量，并能有效地培养学生的创造性思维。     

再谈大宁河引江济汉补水方案

本文论证了由大宁河补水入丹江的必要性。认为抽水电力可由系统中的低谷容量和调节性能差的水电站所提供 ;抽水季节限定在 5～ 11月的丰水期 ,这样不会影响三峡机组的出力 ;枯水季节因为不抽水 ,所以对航运和发电不会产生任何影响 ,汛后蓄满三峡水库也无问题 ;堵河一侧修建电站之后 ,除可为均匀调水提供调节库容外 ,尚具有发出峰电的抽水蓄能效益和防洪效益。这些电力可在华中地区吸纳 ,不需要远距离输送到华东、广东。按不同的方式估算 ,补水成本介于 0 1～ 0 3 5元 m3之间。文章修改了原来提出的方案 ,认为可根据调水需要 ,对补水工程予以分期实施。补水工程与现在的中线工程不相重叠 ,对现行方案无影响 ,但作为中线调水水源问题的必要补充 ,现在应予以研究。     

Sequencing and functional analysis of the Hansenula polymorpha genomic fragment containing the YPT1 and PMI40 genes

A 6.0 kb genomic DNA segment was isolated by its ability to rescue the temperature-sensitive growth defect and the hypersensitivity to sodium deoxycholate of a spontaneous vanadate-resistant mutant derived from Hansenula polymorpha DL-1. The genomic fragment contains four open reading frames homologous to the Saccharomyces cerevisiae genes YPT1 (which codes for a GTP-binding protein; 75% amino acid identity), PMI40 (encoding phosphomannose isomerase; 61% identity), YLR065c (30% identity) and CST13 (28% identity). The H. polymorpha YPT1 homologue (HpYPT1) was found to be responsible for the complementation of the temperature-sensitive phenotype and the sodium deoxycholate sensitivity of the mutant strain. Disruption of the H. polymorpha PMI40 homologue (HpPMI40) resulted in the auxotrophic requirement for D-mannose. The heterologous expressions of HpYPT1 and HpPMI40 were able to complement the temperature-sensitive phenotype of S. cerevisiae ypt1-1 mutant and the mannose auxotrophy of S. cerevisiae pmi40 null mutant, respectively, indicating that the H. polymorpha genes encode the functional homologues of S. cerevisiae YPT1 and PMI40 proteins. The nucleotide sequence has been submitted to GenBank under Accession No. AF454544.     

论孙子互余定理I

本文给出一个与孙子定理（中国剩余定理）相并行的对偶理论-孙子互余定理，用以解决一元一次互余式组通解的问题。同时还给出互余式组与同余式组的一个等价转换定理。这是一个值得研究的对偶规律，而且具有一定的普遍意义，是对孙子定理的进一步扩展和补充。     

Cloning of a fatty acid synthase component FAS1 gene from Saccharomyces kluyveri and its functional complementation of S. cerevisiae fas1 mutant

A gene encoding a fatty acid synthase component, FAS1, has been cloned from a genomic library of the polyunsaturated fatty acid (PUFA)-producing yeast Saccharomyces kluyveri. This gene (named Sk-FAS1) was found to contain an open reading frame of 6150 bp, coding for 2049 amino acids. The deduced Sk-FAS1 protein showed significant (75-59%) homology with FAS proteins from the other yeasts, including S. cerevisiae, Candida albicans and Yarrowia lipolytica. The substrate-binding sites of the acetyl transferase and malonyl/palmitoyl transferase domains, and the FMN- and NADPH-binding sites of the enoyl reductase domain, were all highly conserved. Expression of the Sk-FAS1 gene in S. cerevisiae complemented genetic disruption of the S. cerevisiae FAS1 gene (Sc-FAS1), suggesting the formation of a heterogeneous complex of Sk-FAS1 (beta) and Sc-FAS2 (alpha), which is able to function to synthesize fatty acids. Compared with the isogenic wild-type of S. cerevisiae, as well as S. kluyveri, the S. cerevisiae fas1 mutant carrying the Sk-FAS1 gene showed an increase in the relative amount of 16-carbon fatty acids and a decrease in 18-carbon fatty acids.