A whole-genome scan to map quantitative trait loci for conformation and functional traits in Canadian Holstein bulls

Genetic improvement of livestock populations can be achieved through detection and mapping of genetic markers linked to quantitative trait loci (QTL). With the completion of the bovine genome sequence assembly, single nucleotide polymorphism (SNP) assays spanning the whole bovine genome and research work on large-scale identification, validation, and analysis of genotypic variation in cattle has become possible. A total of 462 Canadian Holstein Bulls were used to test the association between SNP and QTL. Single locus linkage disequilibrium regression model was implemented to perform a whole genome scan to identify and map QTL affecting conformation and functional traits. One thousand five hundred thirty-six SNP markers from introns and exons of potential QTL regions for economically important traits across the bovine genome were selected for association analysis. A total of 45 and 151 SNP were found to be associated with 17 conformation and functional traits at a genome- and chromosome-wise significance level, respectively. Among the 196 significant SNP, 169 of them are newly detected in this study, whereas 27 of them have been reported in previous literature and 161 of these were located in genes and are worth further investigating to potentially identify the causative mutations underlying the QTL. The single locus linkage disequilibrium regression method using SNP marker genotypes has proven to be a successful methodology for detecting and mapping QTL in dairy cattle populations.     

Data Driven Prediction of Sintering Burn-Through Point Based on Novel Genetic Programming

 The paper presents an empirical dynamic model of burn-through point (BTP) in sintering process. The model combines two stages of sintering process, cold processing stage and sintering stage. Fist, cold bed permeability measured by Gas velocity is introduced in the cold stage. Then, K-Means clustering is applied to partition the feed according to the permeability. Besides, for each clustering, a novel genetic programming (NGP) is proposed to construct the empirical model of the waste gas temperature and pressure drop through the bed in sintering stage. NGP adopts least square method (LSM) and M-estimator to improve the ability to compute and resist disturbance. Therefore, the paper constructs a model base of burn-through point and the simulation proves that the model base has a good performance.     

用乳状液膜法分离浓缩L-苯丙氨酸

以煤油－Ｎ２０５－Ｐ２０４－ＨＣｌ组成的乳状液膜体系，在喷射提取柱内分别对Ｌ－苯丙氨酸及Ｌ－苯丙氨酸和Ｌ－天冬氨酸的混合溶液进行提取。实验结果表明，用１０００ｍＬ乳状液对初始浓度为２１．２５ｇ／Ｌ的单一Ｌ－苯丙氨酸水溶液提取３次后，外相浓度降到０．９５ｇ／Ｌ，内相最高浓度为１２６．１０ｇ／Ｌ；对Ｌ－苯丙氨酸浓度为８．６４ｇ／Ｌ的混合溶液提取两次后，外相Ｌ－苯丙氨酸浓度降至０．９０ｇ／Ｌ，内相Ｌ－苯     

高碳Mo—B系贝氏体耐磨钢的工业生产与应用

高碳Ｍｏ－Ｂ系贝氏体耐磨钢具有高强度、高韧性、高硬度和冲击条件下，耐磨性和使用寿命远优于高锰钢。经过１０余年工业生产，工艺成熟，性能稳定，在金矿、铜矿、铅锌矿、水泥厂等广泛使用，取得了显著的经济和社会效益。     

动态TDMA资源分配方法研究与实现

针对TDMA机制存在的问题,文章提出了一种动态TDMA方法（DTDMA）并对其参数作了分析,描述了时隙动态调整的过程,最后通过与标准TDMA的比较和仿真验证了其可用性。     

Toward resilient cloud warehousing via a blockchain-enabled auction approach

Cloud warehousing service (CWS) has emerged as a promising third-party logistics service paradigm driven by the widespread use of e-commerce. The current CWS billing method is typically based on a fixed rate in a coarse-grained manner. This method cannot reflect the true service value under the fluctuating e-commerce logistics demand and is not conducive to CWS resilience management. Accordingly, a floating mechanism can be considered to introduce more flexible billing. A CWS provider lacks sufficient credibility to implement floating mechanisms because it has vested interests in terms of fictitious demand. To address this concern, this report proposes a blockchain-enabled floating billing management system as an overall solution for CWS providers to enhance the security, credibility, and transparency of CWS. A one-sided Vickrey–Clarke–Groves (O-VCG) auction mechanism model is designed as the underlying floating billing mechanism to reflect the real-time market value of fine-grained CWS resources. A blockchain-based floating billing prototype system is built as an experimental environment. Our results show that the O-VCG mechanism can effectively reflect the real-time market value of CWSs and increase the revenue of CWS providers. When the supply of CWS providers remains unchanged, allocation efficiency increases when demand increases. By analyzing the performance of the O-VCG auction and comparing it with that of the fixed-rate billing model, the proposed mechanism has more advantages. Moreover, our work provides novel managerial insights for CWS market stakeholders in terms of practical applications.     

Distribution and genesis of the anomalously high porosity zones in the middle-shallow horizons of the northern Songliao Basin

High-quality reservoirs occur in the middle-shallow horizons of the northern Songliao Basin. The distribution and genesis of their anomalously high porosity zones were studied using measured porosities, examination of ordinary thin sections and blue epoxy resin-impregnated thin sections and by SEM. The results show that there are three anomalously high porosity zones at the depth of 450–900 m, 1,300–1,900 m, 2,050–2,350 m respectively, named zone i, zone ii and zone iii from top to bottom. Horizontally, zone i and zone ii are distributed all over the basin except in the Southeastern Uplift, while zone iii is only distributed in the Central Depression. Zone i was formed by meteoric water leaching as well as organic acid dissolution. Zones ii and iii were dominantly formed by organic acid dissolution. Additionally, clay mineral transformation generating H⁺ and hydrocarbon emplacement retarding the cementation of sandstones are also important for the formation of zones ii and iii.     

大型发电机出口断路器事故分析和处理

印度卡玛朗加电厂1号机组（350 MW）在启动调试阶段进行同期并网时,发电机出口发生两相短路事故。基于保护装置的故障录波图、微机事件报文和发生事故时的信息,分析事故原因;将更换断路器后进行的主变压器检测试验、发电机断路器特性试验、发电机短路和空载特性试验、机组带负荷试验（更换发电机断路器后进行）的结果,与事故前检测试验数据比较,确认事故后主变压器、发电机的安全性、可靠性没有改变,可以投入运行;针对此次事故暴露的问题提出反事故措施。     

资本结构优化研究(二)

在资本结构优化研究（一）的基础上,进一步分析资本结构与融资风险、融资成本之间的关系,寻求融资成本与融资风险的对称规律,建立资本结构优化模型的基本约束条件．     

Coarsening behavior of γ′ and γ″ phases in GH4169 superalloy by electric field treatment

The coarsening behaviors of γ′ and γ″ phases in GH4169 alloy aged at 1023 and 1073 K with electric field treatment （EFT） were investigated by transmission electron microscopy （TEM） and positron annihilation lifetime spectroscopy （PALS）. It is demonstrated that precipitation coarsening occurs, and the growth activation energies of γ′ and γ″phases can be decreased to 115.6 and 198.1 kJ.mo1-1, respectively, by applying the electric field. The formation of a large number of vacancies in the matrix is induced by EFT. Due to the occurrence of vacancy migration, the diffusion coefficients of A1 and Nb atoms are increased to be 1.6-5.0 times larger than those without EFT at 1023 or 1073 K. Furthermore, the formation of vacancy clusters is promoted by EFT, and the increase in strain energy for the coarsening of γ′ and γ″ phases can be counterbalanced by the formation of vacancy clusters.