一种删余卷积编解码的RTL实现

提出了一种应用于基于退役通讯卫星的浮标定位信息回传通讯系统的删余卷积编解码方案.给出了RTL代码的功能仿真结果和性能分析,并且已经成功应用于实际系统.该方案利用对存储器的乒乓读写来完成路径和节点权重的更新,大大降低了硬件资源的占用,同时还巧妙的使用了帧尾,降低了设计复杂度.     

基于力流等效的环形网顶破力学行为解析方法

该文提出了一种基于力流等效的环形网片解析计算方法,用于防护系统环形网拦截单元的顶破力学行为解析。考虑钢丝圈数影响,采用液压作动器控制的球冠形顶头对柔性钢丝网片进行位移加载,开展了8种规格共24张环形网片试件的拟静态顶破试验,明确了环形网片在顶破作用下的力-位移关系。根据试验结果,开展了力流分析,发现环形网片顶破极限状态的承载力主要受若干径向分布的环链影响,据此将力流路径上的环链等效为直线纤维,构建了基于力流等效的网片分析模型。采用Python程序求解获得模型的力与位移解,经与试验结果对比分析,验证了该方法的可靠性,同时,该模型可以揭示网片承载的薄弱区分布特征,并能反映网片顶破极限状态下的径向环链受拉特征。     

多功能助剂KLF-808在全钢载重子午线轮胎中的应用

试验研究多功能助剂KLF-808在全钢载重子午线轮胎中的应用效果。结果表明,在全钢载重子午线轮胎胎面胶、下三角胶和外护胶中加入KLF-808,可以降低胶料的门尼粘度,提高胶料的抗硫化返原性能,降低硫化胶的压缩生热,提高成品轮胎的耐久性能;在胎面胶中加入KLF-808,可以提高硫化胶的耐磨和抗刺扎性能。     

Sinomenine Hydrochloride Protects against Polymicrobial Sepsis via Autophagy

Sepsis, a systemic inflammatory response to infection, is the major cause of death in intensive care units (ICUs). The mortality rate of sepsis remains high even though the treatment and understanding of sepsis both continue to improve. Sinomenine (SIN) is a natural alkaloid extracted from Chinese medicinal plant Sinomenium acutum, and its hydrochloride salt (Sinomenine hydrochloride, SIN-HCl) is widely used to treat rheumatoid arthritis (RA). However, its role in sepsis remains unclear. In the present study, we investigated the role of SIN-HCl in sepsis induced by cecal ligation and puncture (CLP) in BALB/c mice and the corresponding mechanism. SIN-HCl treatment improved the survival of BALB/c mice that were subjected to CLP and reduced multiple organ dysfunction and the release of systemic inflammatory mediators. Autophagy activities were examined using Western blotting. The results showed that CLP-induced autophagy was elevated, and SIN-HCl treatment further strengthened the autophagy activity. Autophagy blocker 3-methyladenine (3-MA) was used to investigate the mechanism of SIN-HCl in vitro. Autophagy activities were determined by examining the autophagosome formation, which was shown as microtubule-associated protein light chain 3 (LC3) puncta with green immunofluorescence. SIN-HCl reduced lipopolysaccharide (LPS)-induced inflammatory cytokine release and increased autophagy in peritoneal macrophages (PM). 3-MA significantly decreased autophagosome formation induced by LPS and SIN-HCl. The decrease of inflammatory cytokines caused by SIN-HCl was partially aggravated by 3-MA treatment. Taken together, our results indicated that SIN-HCl could improve survival, reduce organ damage, and attenuate the release of inflammatory cytokines induced by CLP, at least in part through regulating autophagy activities.     

Randomized clinical trial of local anesthetic versus a combination of local anesthetic with self-hypnosis in the management of pediatric procedure-related pain.

A prospective controlled trial was conducted to compare the efficacy of an analgesic cream (eutectic mixture of local anesthetics, or EMLA) with a combination of EMLA with hypnosis in the relief of lumbar puncture-induced pain and anxiety in 45 pediatric cancer patients (age 6-16 years). The study also explored whether young patients can be taught and can use hypnosis independently as well as whether the therapeutic benefit depends on hypnotizability. Patients were randomized to 1 of 3 groups: local anesthetic, local anesthetic plus hypnosis, and local anesthetic plus attention. Results confirmed that patients in the local anesthetic plus hypnosis group reported less anticipatory anxiety and less procedure-related pain and anxiety and that they were rated as demonstrating less behavioral distress during the procedure. The level of hypnotizability was significantly associated with the magnitude of treatment benefit, and this benefit was maintained when patients used hypnosis independently. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

线圈长度对针织物顶破和穿刺性能的影响

文章研究了纬平针和双面集圈组织的顶破强力和准静态抗穿刺性能。实验结果显示:顶破强力和穿刺力均随着针织物线圈长度的减小而增大,两者有显著的线性相关;织物组织结构的差异影响织物的顶破和穿刺性能。     

A methodology to predict a fission gas release ratio of MOX fuel with heterogeneous microstructure

The objective of this study is to formulate a methodology to predict a fission gas release ratio of MIMAS MOX. An irradiated MIMAS MOX fuel with plutonium rich agglomerates was subjected to elemental analyses by electron probe micro analysis and secondary ion mass spectrometry in order to investigate xenon distribution. The results of the elemental analyses showed that the plutonium rich agglomerates at the periphery of the fuel pellet sample retained a high concentration of xenon as gas bubbles. Then, the results were used as reference data for modification of models in a fuel rod analysis code, FEMAXI-7. Using the modified FEMAXI-7, we applied an approach to prediction of fission gas release ratio of MOX fuel with plutonium rich agglomerates. In the approach, two separated analyses using FEMAXI-7 were performed for the plutonium rich agglomerates and the matrix. Fission gas release ratios obtained from the two analyses were processed through weighted-average with burnup ratios of the plutonium rich agglomerates and the matrix. Finally, the fission gas release ratios were compared with results of rod puncture tests. As a result of the comparison, it was confirmed that the proposed approach could well predict fission gas release ratio of MOX fuel with plutonium rich agglomerates.     

穿刺法在海参质构分析中的应用

为了准确客观评价食用态海参的质构特征,建立标准化的海参质构评定方法,以TA-XT plus型物性测试仪作为检测工具,研究了穿刺法在海参质构分析中的应用效果,并采用该方法测定了海参不同部位及不同加工产品的硬度值。结果表明：采用穿刺法分析海参质构,其适宜的测试参数为：P/2N探头、测前速度1 mm/s、测试速度5 mm/s、测后速度5 mm/s、穿刺距离10 mm、触发力5.0 g、数据收集率200 pps。海参不同部位的硬度值存在差异,建议以海参中段背部中心位置作为固定的测定位点。采用该方法测定海参的硬度值,其标准偏差的变异系数在5%以内,且可以明显体现不同海参产品的质构差异。该方法可以为海参品质评定提供科学的技术手段。     

微波冻干怀山药脆片干燥过程中脆性变化与数学模型的建立

为确定微波冻干怀山药脆片在干燥过程中的脆性变化规律,以怀山药为原料,利用微波真空冷冻干燥设备进行干燥,结合干燥特性分析、扫描电子显微镜观察、压汞仪测试及穿刺测试等方法,分析怀山药脆片在干燥过程中的干燥特性、孔隙结构和质构特性变化,建立微波冻干怀山药脆片干燥过程中的脆性数学模型,从而预测怀山药脆片干燥过程的品质变化。结果表明：怀山药微波真空冷冻干燥全过程分为升速阶段和降速阶段,恒速阶段不明显;随着干燥时间的延长,物料的水分质量分数越低,孔隙网络结构越紧密;微波功率密度越大,物料的干燥速率越快,水分质量分数越低,孔隙网络结构越紧密;怀山药脆性最佳模型为DoseResp模型：y＝A1＋（A2－A1）/（1＋10（（lg x0－x）p））,R2＞0.99,其中x为水分质量分数,y为脆性,A、x0、p为系数常数,该模型可较好地预测怀山药脆片的脆性变化规律。