键合法制备硅基1.55μm InP-InGaAsP量子阱激光器

在硅基上成功地制备出了1．55μm InP-InGaAsP量子阱激光器．设计并生长了适合于键合的量子阱激光器结构材料，通过直接键合技术，将Si衬底与InP-InGaAsP外延片键合到一起．剥离去掉InP衬底后，在5～6μm的薄膜上制备出20μm条形边发射激光器．室温下，阈值电流160mA（电流密度为2．7kA／cm^2），功率可达10mW以上（在约350mA电流下），实现了1．55μm长波长边发射激光器与Si的集成．目前，该结果国际上还未见报道

硅基化合物半导体激光器的制作方法

一种硅基化合物半导体激光器的制作方法，包括：在N型磷化铟衬底上形成磷化铟激光器基片；将一N型硅片与上述激光器基片键合、退火，去掉N型磷化铟衬底及P型缓冲层，形成复合片；刻蚀P型欧姆接触层、第一P型覆盖层和腐蚀停止层的两侧，形成脊形波导；在脊形波导两侧制备绝缘隔离层；在脊形波导的顶部制备P型金属电极；刻蚀距脊形波导一侧部分的绝缘隔离层、第二P型覆盖层、本证波导层、有源区本证量子阱、本证波导层和N型波导层，露出N型覆盖层，形成N电极窗口；在N电极窗口上制备N型金属电极；将N型硅片减薄；解理形成单个管芯；将管芯焊接到铜热沉上，在热沉上制备一微晶玻璃，并连线；完成硅基化合物半导体激光器的制作

硅基键合InP-InGaAsP量子阱连续激光器的研制

采用键合技术在Si基上制备了InP-InGaAsP量子阱激光器,实现了电注入室温连续工作.采用低温直接键合的方法,将Si衬底和InP-InGaAsP外延片键合在一起,并制成条宽6μm的脊波导边发射激光器.室温连续工作的1.55μm激光器阈值电流为48mA,对应的阈值电流密度和微分电阻分别为2.13kA/cm~2和5.8Ω,在约220mA时输出光功率达15mW

土壤水分对日光温室西葫芦耗水量及产量的影响

在日光温室中研究了不同土壤水分条件对西葫芦耗水量、产量及水分利用效率的影响。结果表明,在整个生育期,西葫芦总耗水量随土壤含水量的增大而增大。土壤相对含水量保持在90%~100%时,耗水量最大,为8 668.25 m3/hm2。然而水分利用效率却最低,仅为39.7 kg/m3。相反,土壤含水量下限为70%(T3)时,耗水量虽不高,产量却最高,达到352.4 t/hm2,叶片净光合速率和结瓜数也最大,水分利用效率也相应最大,达到了66.1 kg/m3。综合考虑产量构成诸因子和水分利用效率,认为过量灌溉对提高西葫芦产量并不利,合理利用水资源,土壤水分控制在田间持水量的70%~80%较适宜

氮肥水平对甘蓝产量和品质及土壤硝态氮含量的影响

以京丰1号甘蓝品种为试验材料,通过田间小区试验研究了不同氮肥用量对甘蓝产量、品质以及土壤NO3--N含量的影响.结果表明,(1)随着施氮量的增加,甘蓝产量呈先升高后降低趋势,并于施氮量为185.14 kg/hm2时产量最高(25.86 kg/8.4 m2).(2)随着施氮量的增加,甘蓝的NO3--N含量明显增加,而Vc和可溶性糖含量则逐渐下降,并且残留在土壤中的NO3--N含量持续增加.因此,为达到优质高产并同时保持土壤的可持续利用和提高氮肥利用率,在生产实践中甘蓝适宜氮肥施用量为185.14 kg/hm2

品管圈降低卒中患者住院期间便秘发生率的应用研究 Application of Quality Control Circle in Reducing the Incidence of Constipation in In-hospital Stroke Patients

【摘要】 目的 探讨品管圈活动在降低卒中患者住院期间便秘发生率中的应用及维持效果。 方法 在山东大学附属省立医院神经内科开展品管圈活动，针对神经内科住院卒中患者便秘发生率高的原因进行查检、分析及改进，改进措施实施一个月后，对实施品管圈活动前后卒中患者便秘发生率进行比较。半年后将改善措施推广至保健神经内科，比较实施推广一个月后保健神经内科卒中患者便秘发生率的变化。 结果 改善前调查神经内科170例缺血性卒中患者，改善后调查142例缺血性卒中患者，神经内科卒中患者便秘发生率由改善前的67.64%降低到改善后的27.46%，差异有统计学意义（χ2=49.98，P<0.01），半年后改善效果仍维持，便秘发生率为20.06%。保健神经内科卒中患者便秘发生率由改善前的66.50%降低到改善后的25.50%，差异有统计学意义（χ2=67.67，P<0.01）。 结论 通过品管圈活动，有效降低了卒中患者住院期间便秘发生率，可在院内其他科室进行推广。 【Abstract】 Objective To investigate the effect of application of quality control circle (QCC) in reducing the incidence of constipation in in-hospital stroke patients. Methods QCC was implemented in Department of Neurology, Shandong Provincial Hospital, the causes and incidence of constipation of stroke patients were examined and analyzed to develop the improvement measurements. After implementing the improvement measures for one month, the incidences of constipation before and after the improvement were compared. Based on the good improvement effect, the improvement measures were applied in Department of Health Neurology after half a year. The changes of constipation incidence of stroke patients in Department of Health Neurology after implementing the measures for one month were observed. Results 170 and 142 patients with ischemic stroke in Department of Neurology were investigated before and after the QCC, respectively. Through the QCC, the incidence of constipation of stoke patients in Department of Neurology significantly reduced from 68.64% to 27.46% (χ2=49.98, P<0.01). After half a year, the improvement effect still maintained and the incidence of constipation was 20.06%. The incidence of constipation of stroke patients in Department of Health Neurology reduced from 66.43% to 25.32% through the QCC, and the difference was statistically significant(χ2=67.67, P<0.01). Conclusions QCC was effective in reducing the incidence of constipation of in-hospital stroke patients, which can be promoted to the other departments in the hospital

三尖瓣下移畸形合并房间隔缺损致儿童卒中1例报道 A Case of Childhood Stroke Caused by Ebstein’s Anomaly Combined with Atrial Septal Defect

儿童卒中是临床常见的危急症，是儿童致残和死亡的主要原因之一，病因复杂多样，其中心源性卒中不容忽视。三尖瓣下移畸形是一种少见的先天性心脏病，主要累及三尖瓣和右心室，少数可合并房间隔缺损或卵圆孔未闭引起矛盾栓塞，导致心源性卒中发生。本文报道1例由三尖瓣下移畸形合并房间隔缺损引起儿童卒中的病例，超声心动图技术有助于该类疾病的明确诊断、严重度评估以及其他异常的识别。 Abstract: Childhood stroke is a common critical disease, and is one of the main causes of disability and death in children. Its etiology is complex and diverse, meanwhile, cardiogenic stroke cannot be ignored. Ebstein’s anomaly is a rare congenital heart disease, mainly involving the tricuspid valve and the right ventricle, and a few patients may combine with atrial septal defect or patent foramen ovale, which leads cardiogenic stroke because of paradoxical embolism. This paper reported a case of childhood stroke caused by Ebstein’s anomaly combined with atrial septal defect. Echocardiography techniques can help to clarify the diagnosis, assess severity and identify other abnormalities