炭黑气力输送系统改造

介绍了炭黑气力输送系统的结构与工作原理。通过技术改造,解决了炭黑输送系统频繁堵塞,造成炭黑泄漏,污染环境的问题,降低了设备故障率,提高了产品质量,取得较好的直接、间接经济效益。     

输电线路加固改造工程的导线选型

按照导线输送容量的要求，介绍了220kV输电线路加固改造工程中拟采用的三种导线，并根据具体工程情况分析了各自的利弊。通过综合比较，推荐采用铝包钢芯耐热铝合金导线。     

Study on novel second-order NLO azo-based chromophores containing strong electron-withdrawing groups and different conjugated bridges

Novel NLO azo-based chromophores containing strong electron-withdrawing groups and benzene or thiazole moiety as conjugated bridges were synthesized and characterized. values were measured by HRS method, they are in the range of 238–1459 × 10^–30 esu at the fundamental wavelength of 800 nm. For chromopheres 3 and 4, values at the fundamental wavelength of 1064 nm were also measured, they are 1575 × 10^–30 esu and 935 × 10^–30 esu, respectively. Thermal stabilities for these chromophores are reported. We also discuss the effects of different acceptors and conjugating moieties on .     

Rapid Light‐Triggered Drug Release in Liposomes Containing Small Amounts of Unsaturated and Porphyrin–Phospholipids

Prompt membrane permeabilization is a requisite for liposomes designed for local stimuli‐induced intravascular release of therapeutic payloads. Incorporation of a small amount (i.e., 5 molar percent) of an unsaturated phospholipid, such as dioleoylphosphatidylcholine (DOPC), accelerates near infrared (NIR) light‐triggered doxorubicin release in porphyrin–phospholipid (PoP) liposomes by an order of magnitude. In physiological conditions in vitro, the loaded drug can be released in a minute under NIR irradiation, while liposomes maintain serum stability otherwise. This enables rapid laser‐induced drug release using remarkably low amounts of PoP (i.e., 0.3 molar percent). Light‐triggered drug release occurs concomitantly with DOPC and cholesterol oxidation, as detected by mass spectrometry. In the presence of an oxygen scavenger or an antioxidant, light‐triggered drug release is inhibited, suggesting that the mechanism is related to singlet oxygen mediated oxidization of unsaturated lipids. Despite the irreversible modification of lipid composition, DOPC‐containing PoP liposome permeabilization is transient. Human pancreatic xenograft growth in mice is significantly delayed with a single chemophototherapy treatment following intravenous administration of 6 mg kg^?1 doxorubicin, loaded in liposomes containing small amounts of DOPC and PoP.     

矿井水、回(乏)风作工业和民用热(冷)能的可行性分析

井下水、回(乏)风是伴随煤矿整个开采过程但并未被充分利用的自然资源,是煤炭生产过程中的伴生能源。煤矿井下水一般水温在10℃,矿井回风一般温度在14℃以上。通过热泵技术提取其中7℃左右温差的热能,将这部分低温热能搬移、压缩,温度提升至80℃左右,变成高温热能,用于供热和其他用途。根据热泵技术专利开发的风源热泵和水源热泵属无污染的清洁能源设备,成为国家推广的环保节能产品,技术成熟,在河北、山东等地被广泛应用推广。对此项技术在大同煤矿集团公司的应用进行了可行性分析。     

焦化蜡油复合溶剂萃取脱氮的工艺研究

为充分利用焦化蜡油，可将它作为催化裂化的接合原料，但由于焦化蜡油氮含量高，需进行脱氮处理。开发了一种新型复合溶剂，能对焦化蜡油进行有效的溶剂萃取脱氮处理。提出了萃取剂的组成及温度、剂油比和理论级数等适宜的工艺操作参数。该工艺能将精制油的氮含量从5000μg／g降至1500μg／g以下，而精制油的收率在80％以上。     

矢量网络分析仪时域功能分析

矢量网络分析仪采用时频变换及时域选通方法来获得待测器件真实的频率响应。文中给出上述方法理论依据和实现步骤,介绍了不同窗函数对变换结果的影响和基于Chirp-Z变换的时域测量算法,推导出时域选通门的数学表达式,解释了理论结果出现失真的原因。并采用Visual Basic结合Measurement Studio语言编写相关软件实现时域测量功能,最后给出实际测量和变换结果,对结果进行分析后提出下一步的工作方向。     

基于希尔排序的动态优先级调度算法

实时调度策略中,EDF算法应用最为广泛,但其在系统过载的情况下,仅由任务截止期决定任务执行顺序,使得截止期错失率非常高,且系统收益小.近年来,出现了一些改进的EDF算法,综合考虑了时间和执行价值,但未加入能量因素,对于能量有限的系统,充分利用能量是极其重要的.针对这一问题,提出一种基于希尔排序的动态优先级调度算法,在系统过载时,综合考虑任务截止时间、执行价值、消耗能量三种因素确定任务优先级,通过希尔排序算法选出优先级高的任务加入优先调度子集,进行率先调度.实验结果表明,该算法不仅能降低任务截止期错失率,还能提高系统执行收益.     

冷弯薄壁型钢—混凝土组合梁的试验研究及应用

对冷弯薄壁型钢—混凝土组合梁进行了试验研究.成果已经成功地应用于2幢高层建筑楼层结构的设计,取得了良好的技术经济效益和社会效益.