TreePlus: interactive exploration of networks with enhanced tree layouts

Despite extensive research, it is still difficult to produce effective interactive layouts for large graphs. Dense layout and occlusion make food Webs, ontologies and social networks difficult to understand and interact with. We propose a new interactive visual analytics component called TreePlus that is based on a tree-style layout. TreePlus reveals the missing graph structure with visualization and interaction while maintaining good readability. To support exploration of the local structure of the graph and gathering of information from the extensive reading of labels, we use a guiding metaphor of "plant a seed and watch it grow." It allows users to start with a node and expand the graph as needed, which complements the classic overview techniques that can be effective at (but often limited to) revealing clusters. We describe our design goals, describe the interface and report on a controlled user study with 28 participants comparing TreePlus with a traditional graph interface for six tasks. In general, the advantage of TreePlus over the traditional interface increased as the density of the displayed data increased. Participants also reported higher levels of confidence in their answers with TreePlus and most of them preferred TreePlus     

Electrical stimulation, muscle tension and glycolysis in bovine Sternomandibularis

Electrical parameters previously employed to hasten the onset of rigor mortis in carcasses were derived empirically. Various parameters have been studied to determine their relationship to the two-stage fall of muscle pH resulting from stimulation. At any given stimulation period pulse frequency had a considerable effect on the magnitude of the pH fall that occurs during stimulation, the greatest falls, ～ 0·7 pH units in a 120 sec period, being achieved with 5 to 16·6 pulses. sec(-1). The same total number of pulses delivered at differing frequencies did not produce pH falls of equal magnitude. Variation in pulse shape and polarity caused minor changes. Increased energy levels per pulse increases the magnitude of the pH fall during stimulation. All stimulation parameters tested resulted in the rate of pH fall after stimulation being one and a half times to twice that of non-stimulated muscle. The tension-time curves obtained with lower frequencies (< 10 pulses . sec(-1)) show incomplete summation of pulses with sustained tension. At higher frequencies a complete tetanus develops, while tension falls rapidly soon after achieving the peak tension. The relationship between the mechanical and biochemical responses and the implications for stimulation as a practical processing method are discussed.     

Residual blood in lamb muscles

The effect of slaughter method on the residual blood content of the M. longissimus dorsi, the microbiological status of the meat and its tenderness was examined with lambs. There were no differences in any of the characteristics examined between the various stunning procedures used, even though there were marked differences in the amount of blood collected after slaughter.     

基于无线传输技术的水网监控系统

介绍了利用现有的数据采集、数据传输及组态等技术构建的城市二次供水水网无线监控系统。该系统能够对二次供水泵站各种运行参数、运行状态等数据实现实时采集和传输,以实现对城市水网的管理监控和自动化调度。     

论新时期计算机基础教学的主体性、理论性与务实性

新时期的计算机基础教学应体现主体性和务实性,围绕理论知识的渗透,打造计算机基础中职学校模式。本文围绕中职计算机基础教学中学生主体地位的落实、理论性与务实性教学模式的构建进行了探讨。     

基于变量节点可靠度的洗牌置信传播算法

提出了一种新的低密度奇偶校验(Low-Density Parity-Check,LDPC)码串行译码策略.该方法基于原有的LDPC码串行译码策略,根据来自信道的初始消息的可靠度对变量节点或校验节点进行均匀分组.对所提方法的误码率与平均迭代次数进行了分析.仿真结果表明:该策略的性能比原来的LDPC码串行译码策略有很大提高.     

细编穿刺织物矩阵刚度优化设计的研究

机织布在穿刺过程中与钢针矩阵之间产生相互作用,该作用使钢针矩阵产生有害变形,并对布层造成损伤.因此,基于钢针矩阵刚度优化设计的原理,建立优化设计的模型、合理地选择钢针矩阵结构参数,可有效控制穿刺过程中钢针矩阵的变形及布层的损伤,为改进细编穿刺工艺和优化织物结构提供了理论依据.     

Runoff of pharmaceuticals and personal care products following application of biosolids to an agricultural field

Municipal biosolids are a source of nutrients for crop production. Beneficial Management Practices (BMPs) can be used to minimize the risk of contamination of adjacent water resources with chemical or microbial agents that are of public or environmental health concern. In this field study, we applied biosolids slurry at a commercial rate using either subsurface injection or broadcast application followed by incorporation. Precipitation was simulated at 1, 3, 7, 22, 36 and 266 days post-application on 2 m² microplots to evaluate surface runoff of 9 model pharmaceuticals and personal care products (PPCPs), atenolol, carbamazepine, cotinine, gemfibrozil, naproxen, ibuprofen, acetaminophen, sulfamethoxazole and triclosan. In runoff from the injected plots, concentrations of the model PPCPs were generally below the limits of quantitation. In contrast, in the broadcast application treatment, the concentrations of atenolol, carbamazepine, cotinine, gemfibrozil, naproxen, sulfamethoxazole and triclosan on the day following application ranged from 70-1477 ng L^− 1 in runoff and generally declined thereafter with first order kinetics. The total mass of PPCPs mobilized in surface runoff per m² of the field ranged from 0.63 µg for atenolol to 21.1 µg for ibuprofen. For ibuprofen and acetaminophen, concentrations in runoff first decreased and then increased, suggesting that these drugs were initially chemically or physically sequestered in the biosolids slurry, and subsequently released in the soil. Carbamazepine and triclosan were detected at low concentrations in a runoff event 266 days after broadcast application. Overall, this study showed that injection of biosolids slurry below the soil surface could effectively eliminate surface runoff of PPCPs.     

河北省矿产资源综合利用政策效果及对策

河北省矿产资源种类多、储量大,共伴生资源丰富,开发利用规模大,尾矿废石分布广、数量大,这些特点决定了河北省矿产资源开发必须走集约节约与综合利用之路。本文论述了河北省矿业开发中存在的问题及实行矿产资源综合利用的必然性,简要介绍了国家对矿产资源综合利用所实行的主要扶持政策以及河北省配套的政策及主要做法,总结了这些政策实施后对综合利用工作的推动作用和主要效果,并结合河北省实际提出了今后需采取的主要对策措施。     

鱼雷多目标自导系统声学建模与实现

多目标自导系统是新型鱼雷制导系统发展的必然趋势,是对现有自导系统功能的完善与提升,通过建模手段对其性能及技术特点进行研究是自导研究领域非常关心且亟待解决的问题.该文对鱼雷多目标自导系统的功能及系统构成进行了研究,并从系统层面对其关键技术进行了讨论.基于层次化和模块化的建模原则,将自导系统分解为彼此独立的11个功能模块,利用Visual C++平台在声信号层次上设计并建立了鱼雷多目标自导声学仿真系统,给出了主要模块的声学模型.最后,在相同的复杂对抗环境下对多目标自导系统和传统的单目标自导系统进行了100次统计仿真试验,结果表明,多目标自导系统较传统的单目标自导系统命中概率提高了38.5%,航程损耗减小了17.6%,显著提高了复杂对抗环境下自导系统的作战效能.