BLAST

摘要： Penetration and internal blast behavior of reactive liner enhanced shaped charge against concrete space were investigated through experiments and simulations.The volume of the enclosed concrete space is about 15 m^(3).The reactive liner enhanced shaped charge utilizes reactive copper double-layered liner,which is composed of an inner copper liner and an outer reactive liner,while the reactive material liner is fabricated by PTFE/Al(Polytetrafluoroethylene/Aluminum)powders through cold-pressing and sintering.Static explosion experiments show that,compared with the shaped charge which utilizes copper liner,the penetration cavity diameter and spalling area of concrete by the novel shaped charge were enlarged to 2 times and 4 times,respectively.Meanwhile,the following reactive material had blast effect and produced significant overpressure inside the concrete closed space.Theoretical analysis indicates concrete strength and detonation pressure of reactive material both affect the penetration cavity diameter.To the blast behavior of reactive material inside the concrete space,developing TNT equivalence model and simulated on AUTODYN-3 D for analysis.Simulation results reproduced propagation process of the shock wave in concrete space,and revealed multi-peaks phenomenon of overpressure-time curves.Furthermore,the empirical relationship between the peak overpressure and relative distance for the shock wave of reactive material was proposed.

摘要： 很多看过BLAST赛事的观众都会有这样一种感觉--意犹未尽。有人将观看比赛的过程描述成吃快餐的画面:“当主舞台灯光熄灭的那一刻,我会有类似吃快餐的不满感。比赛速度快,也很便捷,充满十足的卡路里和完完全全留不下的记忆。”

摘要： Three-dimensional rock fracture induced by blasting is a highly complex problem and has received considerable attention in geotechnical engineering.The material point method is firstly applied to treat this challenging task.Some inherent weaknesses can be overcome by coupling the generalized interpolation material point(GIMP)and the convected particle domain interpolation technique(CPDI).For the media in the borehole,unchanged GIMP-type particles are used to guarantee a homogenous blast pressure.CPDITetrahedron type particles are employed to avoid the fake numerical fracture near the borehole for the rock material.A blasting experiment using three-dimensional single-borehole rock was simulated to examine the applicability of the coupled model under realistic loading and boundary conditions.A good agreement was achieved between the simulation and experimental results.Moreover,the mechanism of three-dimensional rock fracture was analyzed.It was concluded that rock particle size and material parameters play an important role in rock damage.The reflected tensile waves cause severe damage in the lower part of the model.Rayleigh waves occur on the top face of the rock model to induce a hoop failure band.

摘要： 将山东地区采集的7株野生羊肚菌菌株,采用传统形态学分析,结合ITS,ef1-α,rpb1序列比对方法,对获得的7株试验菌株进行分子鉴定和系统发育分析.Blast比对结果显示,编号为Me25、Me27、M51的菌株与宽圆羊肚菌(Morchella robusta)相似性超过99％,Me30与羊肚菌(Morchella esculenta)相似性超过99％,Me91与Mes-19(Morchella sp.)相似性超过99％,Me1-2和Me4-1与小海绵羊肚菌(Morchella spongiola)相似性超过99％.系统发育分析也发现聚类情况与Blast结果相对应.结合传统形态学特性观察及分子系统发育分析,确定编号Me25、Me27、M51为宽圆羊肚菌,Me30为羊肚菌,Me1-2和Me4-1为小海绵羊肚菌,Me91为Morchella sp..本研究为羊肚菌属真菌的分类鉴定提供了更为简单精确的方法,补充了山东省内野生羊肚菌资源,有利于北方羊肚菌育种工作.

摘要： Knowledge of genetic diversity and barcoding of yam is lacking in Enugu and Ebonyi States of southern Nigeria. Therefore, DNA barcoding was used to facilitate identification and biodiversity studies of yam species from Southern Nigeria. Seventy five yam accessions were collected from Enugu and Ebonyi States, including International Institute of Tropical Agriculture for DNA extraction and amplification using a chloroplast DNA (cpDNA) ribulose-1,5-bisphosphate carboxylase (rbcL) marker. There was high level of similarity among the accessions and presence of 534 conserved and 7 variable sites. A transversional mutation of G/T at a consensus position of 335 was identified followed by transitions at 362 (A/G), 368 (A/G), 371 (C/T) and 391 (C/T) within the accessions. Phylogeny resolved the yam accessions into ten major groups with their bootstrap values ranging from 0 - 100. Phylogenetic diversity was highest in group X, followed by VII, VI and IX. The inter-group genetic distance based on Kimura 2-parameter model ranged from 0.5000 ± 0.4770 - 5.0560 ± 2.5760, while the intra-group had 0.5250 ± 0.5000 - 2.0103 ± 1.2579. The mean genetic diversity within the entire population was 0.7970 ± 0.06910. BLAST analysis of total bit score, query coverage, and percentage identity were in the ranges of 411 - 1011, 99% - 100% and 97% - 100%, respectively. However, the rbcL could not resolve the yam accessions well following the comparative assessment of some discrepancies in the detected number of species from phylogenetic groupings, genetic diversity indices and NCBI BLAST hits, thereby, exposing the inefficiency of this marker in discriminating the yam accessions. It was demonstrated that rbcL is not an effective marker;therefore, it should not be recommended as a standard-alone marker of choice for DNA barcoding of yam accessions, especially, when accurate identification, discrimination and estimation of genetic diversity of this vital crop are of paramount importance for crop improvement and germplasm conservation.

摘要： Concrete properties can be improved using Fine Blast Furnace Slag (BFS). The latter was used to replace cement in concrete at 10%, 15%, 20%, 25%, and 30% proportions and properties of both fresh and hardened concrete improved. Best workability (evaluated by slump and Table tests) was recorded at 30% of BFS addition. VEBE-time, an indication of workability of concrete, decreased to its lowest value (about 4 seconds at 30% BFS) and compaction factor attained its maximum value of 99% at BFS 25%. For density and unit weight, 30% of fine BFS in concrete mix resulted in maximum density of 2180 kg/m3 for fresh concrete, and 2430 kg/m3 for hardened concrete. Unit weight of concrete achieved a maximum of 23.9 kN/m3 at 30% BFS has achieved specified strength at 1st week and 28 days, also the late strength is high at 56 and 84 days. Bond and flexure loads come high of BFS use. The data of compressive, bond, and flexural strengths are highly related. Results of research are useful and may be applied using fine BFS to improve the properties of concrete materials.

摘要： The massive extension in biological data induced a need for user-friendly bioinformatics tools could be used for routine biological data manipulation. Bioanalyzer is a simple analytical software implements a variety of tools to perform common data analysis on different biological data types and databases. Bioanalyzer provides general aspects of data analysis such as handling nucleotide data, fetching different data formats information, NGS quality control, data visualization, performing multiple sequence alignment and sequence BLAST. These tools accept common biological data formats and produce human-readable output files could be stored on local computer machines. Bioanalyzer has a user-friendly graphical user interface to simplify massive biological data analysis and consume less memory and processing power. Bioanalyzer source code was written through Python programming language which provides less memory usage and initial startup time. Bioanalyzer is a free and open source software, where its code could be modified, extended or integrated in different bioinformatics pipelines. Bioinformatics Produce huge data in FASTA and Genbank format which can be used to produce a lot of annotation information which can be done with Python programming language that open the door form bioinformatics tool due to their elasticity in data analysis and simplicity which inspire us to develop new multiple tool software able to manipulate FASTA and Genbank files. The goal Develop new software uses Genomic data files to produce annotated data. Software was written using python programming language and biopython packages.

摘要： The strong global demand for iron and steel has necessitated the utilization of various low grade iron ores, which are not suitable for direct utilization in ironmaking processes. The low grade iron ores cannot be dressed effectively using the traditional mineral processing methods because of complicated min-eral compositions. The main problem associated with exploiting these deposits is the dissemination of fine silicate minerals and the high level of phosphorus content due to the poor liberation of iron minerals from the gangues. The pre-sent manuscript is aimed to investigate reduction properties of iron ores rich in phosphorous in order to study the suitability of using these ores in iron blast furnace. Representative technological samples of iron ore are collected from Eastern South Aswan iron ore mine in Egypt. The principal gangue contents are SiO2 7.76%, and P2O5 1.13%. Iron and phosphorus exist in the form of hematite 78% and apatite respectively. The ore was fired at 1000°C for 3 hours. The green and fired samples were isothermally reduced at conditions which closely represent the theoretical reduction conditions in different zones of blast furnace. The influence of reduction conditions on the reduction behaviour and the morphology of the reduced samples were investigated. After reduction apatite is changed to Calcium phosphate beside fayalite and quartz. The reduction rate of fired samples is greater than that for the green ones and that was confirmed by morphological examination. At cohesive zone condition, the effect of firing on reduction characteristics cannot be distinguished.

摘要： This research studies the impact of different types of coarse aggregate on the behavior of geopolymer concrete based on both fly ash (FA) and ground granulated blast furnace slag (GGBFS) in different marine environments. Aiming to solve the problems caused by the construction and demolition waste and the depletion of natural aggregates, in the present study coarse recycled aggregates is used to produce new green concrete with a fly ash-slag based geopolymer. By this examination, the research seeks to improve the quality and productivity of concrete used in construction and hydraulic projects. For this research, four mixtures containing different types of coarse aggregate in two different water environments were used. The utilized mixtures contained natural aggregate concrete (NAC) such as basalt and crushed marble. Also, recycled coarse aggregate concrete (RAC), which totally replaced natural aggregate, was presented in this paper such as crushed concrete and crushed ceramic. For this study, in the sieve analysis;specific and unit weights, was recorded. Furthermore, the mechanical properties were determined, using a compressive test that was conducted on the 7th, 28th, 56th and 90th days at different water environments;potable water (PW) and sea water (SW). Durability test was also performed for total absorption measurement. Results indicated that geopolymer concrete exhibits better strength in marine environments than in those of potable water. Results also showed that crushed marble (CMA) exhibits higher compressive strength and durability.

摘要： Rice blast fungus is notorious for changeability in pathogenicity, but it lacks sexual life cycle. It can be postulated that such an imperfect fungus has another mechanism for generating genetic variations. Recent studies concerning comparative genomics reveal that parasexual recombination may play important role in the evolution of rice blast fungus. To observe the parasexualism of rice blast (Pyricularia oryzae) and crabgrass blast (Pyricularia grisea) fungus double inoculation and punch method were applied in this experiment. A total of 520 isolates collected from the double inoculated lesions was subjected to PCR-RFLP analysis of the ITS region to identify subcultures of the inoculated rice blast isolates. As a result, four isolates from the three double inoculated lesions with SA13-1ME and TP106 were identified as subcultures of TP106. To access the recombination genotypes, a total of 17 isolates from the three lesions was subjected to MAGGY-DNA fingerprint analysis. However, recombinant DNA fingerprint patterns between TP106 and SA13-1ME were not detected among the 17 isolates. Although TP022 was not recovered from the double inoculated lesions, the fact that TP106 was recovered from the double inoculated lesion indicates that rice blast fungus can invade and colonized in blast lesion on crabgrass. The opportunistic infection on the double inoculated lesions observed in this study potentially provides new insight into the life cycle of rice blast pathogen.

摘要： 提出了贝尔实验室分层空时码(BLAST)基于树结构的通用检测模型。基于该模型,系统地分析了基于连续干扰抵消的最小均方误差及迫零检测、高斯近似、迭代树搜索检测、确定性序列蒙特卡罗以及球形检测等实用BLAST检测算法,得到了一些有启发性的结论。

摘要： 提出了贝尔实验室分层空时码(BLAST)基于树结构的通用检测模型。基于该模型,系统地分析了基于连续干扰抵消的最小均方误差及迫零检测、高斯近似、迭代树搜索检测、确定性序列蒙特卡罗以及球形检测等实用BLAST检测算法,得到了一些有启发性的结论。

摘要： 提出了贝尔实验室分层空时码(BLAST)基于树结构的通用检测模型。基于该模型,系统地分析了基于连续干扰抵消的最小均方误差及迫零检测、高斯近似、迭代树搜索检测、确定性序列蒙特卡罗以及球形检测等实用BLAST检测算法,得到了一些有启发性的结论。

摘要： 第四代移动通信(4G)中系统的速度最高可达100Mbit/s,而带宽在移动通信中是非常稀缺的资源,作为4G中的核心技术的MIMO能够提高频谱利用率 。本文给出了多输入多输出(MIMO)技术的概念,阐述了MIMO核心技术以及MIMO-OFDM的技术特点。它能在不增加带宽的情况下，成倍地提高通信系统的容量和频谱利用率,是下一代移动通信系统中最富有竞争力的技术之一。

摘要： 第四代移动通信(4G)中系统的速度最高可达100Mbit/s,而带宽在移动通信中是非常稀缺的资源,作为4G中的核心技术的MIMO能够提高频谱利用率 。本文给出了多输入多输出(MIMO)技术的概念,阐述了MIMO核心技术以及MIMO-OFDM的技术特点。它能在不增加带宽的情况下，成倍地提高通信系统的容量和频谱利用率,是下一代移动通信系统中最富有竞争力的技术之一。

摘要： 第四代移动通信(4G)中系统的速度最高可达100Mbit/s,而带宽在移动通信中是非常稀缺的资源,作为4G中的核心技术的MIMO能够提高频谱利用率 。本文给出了多输入多输出(MIMO)技术的概念,阐述了MIMO核心技术以及MIMO-OFDM的技术特点。它能在不增加带宽的情况下，成倍地提高通信系统的容量和频谱利用率,是下一代移动通信系统中最富有竞争力的技术之一。

摘要： 第四代移动通信(4G)中系统的速度最高可达100Mbit/s,而带宽在移动通信中是非常稀缺的资源,作为4G中的核心技术的MIMO能够提高频谱利用率 。本文给出了多输入多输出(MIMO)技术的概念,阐述了MIMO核心技术以及MIMO-OFDM的技术特点。它能在不增加带宽的情况下，成倍地提高通信系统的容量和频谱利用率,是下一代移动通信系统中最富有竞争力的技术之一。

摘要： 第四代移动通信(4G)中系统的速度最高可达100Mbit/s,而带宽在移动通信中是非常稀缺的资源,作为4G中的核心技术的MIMO能够提高频谱利用率 。本文给出了多输入多输出(MIMO)技术的概念,阐述了MIMO核心技术以及MIMO-OFDM的技术特点。它能在不增加带宽的情况下，成倍地提高通信系统的容量和频谱利用率,是下一代移动通信系统中最富有竞争力的技术之一。

摘要： 第四代移动通信(4G)中系统的速度最高可达100Mbit/s,而带宽在移动通信中是非常稀缺的资源,作为4G中的核心技术的MIMO能够提高频谱利用率 。本文给出了多输入多输出(MIMO)技术的概念,阐述了MIMO核心技术以及MIMO-OFDM的技术特点。它能在不增加带宽的情况下，成倍地提高通信系统的容量和频谱利用率,是下一代移动通信系统中最富有竞争力的技术之一。

摘要： 基于V‑BLAST编码方式的MIMO‑SCMA系统上行链路构架方法，属于多收多发信息传输系统构架领域。本发明克服了原有SCMA系统多用户间非正交性和软解码方式的限制，而将SCMA与MIMO技术相互融合的方法。本发明设定MIMO‑SCMA系统中每个用户有两根发射天线，将要发送的信息比特序列串并转换为两路，然后分别进行1/2码率的卷积码编码，之后进行交织；根据SCMA码本进行SCMA映射，得到每个用户要发送的信息，按映射矩阵F将所有用户发送的信息调制到子载波上，完成调制编码；信息由天线发送，经过信道后，由基站的两根天线接收并通过最小均方误差方法进行检测。本发明具有信息传输速率高、频谱效率高的优点。

摘要： 本发明提供一种在多入多出系统中V-BLAST检测方法，其中，引入最大后验概率准则，按照每层符号的概率由大到小的顺序检测，将先检测到的符号作为干扰从接收到的信号中消除，然后检测剩余各层符号中概率最大的层的符号，依次类推，直到检测出所有的符号。依照本发明的在多入多出系统中V-BLAST检测方法，降低了复杂度，提高了性能。

摘要： 一种用于BLAST多天线通信系统的天线发射功率分配方法及发射装置，其首先由连续干扰抵消接收机将估计的平均接收信噪比反馈回通信系统的发射机，然后所述发射机根据接收的平均接收信噪比将发射功率分配至各发射天线以使所述连续干扰抵消接收机经过信号检测后所获得的信号向量符号错误概率最小，如此可减少需要的反馈信道信息量，同时也使通信系统的误比特性能得到较大的改善。

摘要： 本发明提供一种V-BLAST系统中发送速率、功率分配方法，该方法包括以下步骤：发送端通过串并转换将数据流分解到各个发送天线上；接收端采用迫零加排序串行干扰抵消的译码算法对接收信号进行处理，以得到解码数据；其特征在于，该方法进一步包括调整步骤，该调整步骤通过对该V-BLAST系统在时变信道下各子流后验信噪比进行统计得到调制方式信息和功率分配信息，发送端根据得到的调制方式信息和功率分配信息对各发送天线进行调整，以使发送端总功率和各发送天线之间的功率分配随信道状态变化而变化。由此优化了系统的BER性能。

摘要： 本发明公开了基于Blast的实时物理破坏同步技术，具体步骤如下：第一步：破坏事件发生时，将所有的参数告知客户端；第二步：服务器和客户端使用Blast库，根据破坏参数计算破坏得到结果，使用结果数据在场景中产生碎块；第三步：服务器和客户端分别使用物理模拟，根据冲击力参数，实时计算出碎块的运动状态；第四步：服务器端按照频率将所有碎块的位置、转角、速度、角速同步给各客户端；第五步：客户端将客户端碎块的物理状态根据服务器同步来的数据和修正参数实时做平滑修正。本发明能够完全同步物理破坏过程中服务器和各客户端碎块运动轨迹的一致，从而与场景中的角色产生相互作用。

摘要： 本发明涉及基因工程技术，公开了一种在赤霉菌中建立的基于CRISPR技术整合的URA‑Blaster方法。该方法包括以下步骤：(1)以URA3基因缺失的赤霉菌作为出发菌，利用Crispr技术将筛选标记HisG‑URA3‑HisG片段整合到所述出发菌的基因组上，得到阳性转化菌；(2)将所述阳性转化菌的基因组上URA3基因丟除，以能够再次作为出发菌循环利用URA3筛选标记进行遗传转化；其中，所述HisG‑URA3‑HisG片段的核苷酸序列如SEQ ID NO.1所示。该方法不仅能够实现赤霉菌筛选标记的循环利用，为赤霉菌的基因编辑提供实用的筛选方法，而且筛选标记的重组效率高，赤霉菌的遗传操作体系高效稳定。

摘要： 基于V-BLAST编码方式的MIMO-SCMA系统上行链路构架方法，属于多收多发信息传输系统构架领域。本发明克服了原有SCMA系统多用户间非正交性和软解码方式的限制，而将SCMA与MIMO技术相互融合的方法。本发明设定MIMO-SCMA系统中每个用户有两根发射天线，将要发送的信息比特序列串并转换为两路，然后分别进行1/2码率的卷积码编码，之后进行交织；根据SCMA码本进行SCMA映射，得到每个用户要发送的信息，按映射矩阵F将所有用户发送的信息调制到子载波上，完成调制编码；信息由天线发送，经过信道后，由基站的两根天线接收并通过最小均方误差方法进行检测。本发明具有信息传输速率高、频谱效率高的优点。

摘要： 本发明以下一代移动通信为背景，涉及Turbo-BLAST双迭代检测设计方法。将比特交织编码调制迭代译码(BICM-ID)思想与Turbo-BLAST系统相结合，给出一种基于双迭代的Turbo-BLAST系统模型，提出一种基于检测器与译码器之间外层迭代检测、解调器与译码器之间内层迭代译码的Turbo-BLAST双迭代检测方法。本发明有效地将BICM-ID思想用于Turbo-BLAST系统，通过双迭代检测达到进一步改善Turbo-BLAST系统误比特率的目的。仿真表明，与Turbo-BLAST迭代检测相比，采用所提的Turbo-BLAST双迭代检测方法可以进一步提高系统的BER性能。

摘要： 本发明涉及计算机和生物信息学技术领域，公开了一种基于BLAST的分布式基因序列比对方法，包括：S1、程序对用户参数进行解析，并确定MPI线程个数，读取查询序列文件，根据任务个数分割查询序列，每个MPI线程读取各自的MPI线程序号；S2、根据MPI线程序号判断当前MPI线程是否为头节点，如果当前MPI线程是头节点，则等待其它MPI线程的通信请求，如果有则响应，并将当前任务分配给提出通信请求的线程；继续分配任务；如果当前MPI线程不是头节点，则先向头节点请求任务序号，根据任务序号读取查询序列文件片段，并执行BLAST，得到BLAST比对结果，然后将任务序号减1，执行BLAST完再请求任务序号；S3、合并所有BLAST比对结果。本发明能降低生物信息学研究的硬件成本。

摘要： 本实用新型涉及一种小型USB blaster烧写器，该烧写器用于连接PC机和FPGA，所述的烧写器包括标准USB接口、电路板和烧写头，所述的电路板两端分别连接标准USB接口和烧写头，所述的标准USB接口与PC机连接，所述的烧写头与FPGA连接。与现有技术相比，本实用新型具有体积小、使用方便等优点。