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目的 分析非外伤性皮质凸面蛛网膜下腔出血（convexity s ubarachnoid h aemorrhage，cSAH）患者头痛 的特点及出血病因，提高神经科医师对该病的认识。 方法 收集自2010年1月-2014年12月在北京大学第三医院就诊的14例cSAH病例，回顾性分析其头痛 特点、临床表现、影像学检查及实验室检测结果。 结果 14例cSAH患者中，8例（57.1%）表现为急性头痛，其中6例（75.0%）为偏侧轻中度胀痛；4例 （50%）头痛为一过性，持续时间一般不超过30 min。病因学方面，12例（85.7%）患者病因明确：8例 （57.1%）存在cSAH同侧颈内动脉系统血管重度狭窄或闭塞，颅内静脉窦血栓形成、脑动静脉畸形、使 用抗凝药物以及可疑脑淀粉样血管变性各1例。 结论 急性头痛是cSAH最常见的临床表现，一过性头痛或轻中度头痛的患者需注意cSAH的可能；同 侧颈内动脉系统主干血管动脉粥样硬化性重度狭窄是cSAH的重要病因。 Abstract: Objective To analyze the characteristics of headache and the possible cause of convexity subarachnoid hemorrhage (cSAH), so as to increase the understanding of cSAH. Methods A total of 14 cases of cSAH who came to Peking University third hospital between January 2010 and December 2014 were enrolled. Retrospective review was made upon the characteristics of headache, clinical manifestations, clinical medical records, and neuroimaging studies. Results Among 14 patients, acute headache (n =8, 57.1%) was the most common clinical manifestations, including 6 cases (75%) for unilateral. And 4 cases (50%) had a transient headache, usually lasting no longer than half an hour. There were 12 cases (85.7%) with clear etiology; there were 8 cases (57.1%) with severe stenosis or occlusion in ipsilateral internal carotid artery system of cSAH; and there were 4 cases: one with intracranial venous sinus thrombosis, one with cerebral arteriovenous malformation, one using anticoagulant and one with suspected cerebral amyloid vascular degeneration, respectively. Conclusion In the present study, acute headache was the most common clinical manifestation of cSAH. The patients with transient headache or with mild to moderate headache should be aware of the possibility of cSAH. Severe atherosclerotic stenosis or occlusion in the main branch of ipsilateral internal carotid artery system was an important cause of cSAH.

目的 通过分析颅内静脉窦血栓形成（cerebral venous sinus thrombosis，CVST）的病例，总结CVST患者 头痛的特点，提高神经科医师对该病的认识。 方法 收集2007年1月-2016年12月在北京大学第三医院就诊的CVST病例，回顾其头痛特点、临床表 现、影像学检查及化验结果，并复习相关文献进行分析总结。 结果 共入组18例CVST患者，本组CVST最常见的部位是横窦（77.8%，14/18），其次为乙状窦（61.1%， 11/18）和上矢状窦（50%，9/18）；14例（77.8%）存在多个颅内静脉窦血栓。所有患者均以头痛为首 发症状，其中7例（38.9%）为单纯性头痛；11例合并其他临床症状，包括癫痫（38.9%，7/18）、呕吐 （44.4%，8/18）、肢体麻木（11.1%，2/18）、肢体无力（16.7%，3/18）、眼部症状（22.2%，4/18）以及 意识障碍（11.1%，2/18）。9例（50%）为偏侧头痛，其中8例（88.9%，8/9）存在同侧CVST；头痛视觉 模拟评分法（visual analogue scale，VAS）评分平均7.0分（3～10分）；头痛发病形式5例（27.8%）为急性， 12例（66.7%）为亚急性，1例（5.6%）为慢性。 结论 头痛是CVST最常见的首发症状，偏侧头痛CVST患者血栓以头痛同侧多见；头痛亚急性起病的 患者，尤其需注意CVST的可能性。 Abstract: Objective To analyze the characteristics of headache in cerebral venous sinus thrombosis (CVST) through case report, so as to increase the understanding of CVST. Methods Cases of CVST who came to Peking University third hospital between January 2007 and December 2016 were collected. Retrospective review was made upon the characteristics of headache, clinical manifestations, clinical medical records, and neuroimaging studies. And the relevant literatures were reviewed for discussion. Results A total of 18 patients were enrolled into study. Transverse sinus was the most common site of thrombosis (77.8%, 14/18), followed by sigmoid sinus (61.1%, 11/18) and the superior sagittal sinus (50%, 9/18). There were 14 cases (77.8%) had involvement of multiple sinuses. Headache was the first symptom in all patients, including 7 cases (38.9%) with headache as the only symptom. There were 11 cases complicated with other symptoms, including epilepsy (38.9%, 7/18), vomiting (44.4%, 8/18), limb numbness (11.1%, 2/18), limb weakness (16.7%, 3/18), eye symptoms (22.2%, 4/18), and disturbance of consciousness (11.1%, 2/18). Headache was located in one side in 9 cases (50%), and 8 cases (88.9%, 8/9) had ipsilateral CVST. The mean of visual analogue scale/score (VAS) was 7 points (3-10 points). The onset of headache was acute in 5 cases (27.8%), subacute in 12 cases (66.7%), and chronic in 1 case (5.6%). Conclusion Headache was the most common symptom of CVST. Venous sinus thrombosis located in the same side of headache in CVST patients with unilateral headache. Young patients with subacute headache should be alert to the possibility of CVST.

【目的】探讨羟基磷灰石板对矫正眼眶爆裂性骨折的作用及手术方法。【方法】23 例病人, 男18 例, 女性5 例, 先依眼眶CT 扫描确定骨折位置及眼眶组织的嵌顿情况, 再从骨折位置的骨膜下探查并把嵌顿的软组织复位, 然后, 用2 mm 厚的羟基磷灰石板从骨膜下填充骨折凹陷区。手术过程注意避免损伤眶内的神经和血管等重要组织, 对合并眶缘骨折缺损 者用钛网成形。手术前后常规测量眼球突出度, 对视力高于0.1 者行同视机检查, 术后平均随访18.2 个月。【结果】所有病 人眼球内陷得到不同程度的矫正, 18 例(78.3 %)从术前双眼球突出度相差4 ～ 10 mm 恢复至术后相差

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To investigate the effect of biochar on yield and nutrient quality of millet grain under tribenuron-methyl stress, in this study, Zhangzagu 10 and Jingu 21 were used as the study subjects, using a two-factor completely randomized block design with different biochar concentrations(0, 2%) and the amounts of tribenuron-methyl(113, 225, 450 g/ha), taking no tribenuron)methyl as a control, a total of 8 treatments were set to analyze the effect of addition of biochar on yield and nutrient quality of millet grain under tribenuron-methyl stress. The results showed that after the addition of biochar, the grain yield of two millet varieties significantly increased by 10.50% and 20.26% compared with that without adding biochar, and the yield of Zhangzagu 10 was significantly higher than that of Jingu 21. The content of potassium, vitamin C, and soluble sugar in the grains of Zhangzagu 10 and Jingu 21 increased significantly after adding biochar, which increased by 18.68% and 1.38%, 6.92% and 13.08%, 22.29% and 3.31%; The phosphorus content in the grais of Zhangzagu 10 reached the maximum when the spray concentration of tribenuron-methyl was 113 g/ha. After the addition of biochar in Jingu 21, the phosphorus content and crude fat content in the grains showed a decreased trend.After the addition of biochar, in the treatments of spraying tribenuron-methyl, the nitrogen content in the grains of the two millet varieties significantly increased by 3.79% and 4.62% compared with that in the treantment of no spraying tribenuron-methyl. Therefore, the application of biochar could alleviate the impact of tribenuron)methyl stress on millet yield and nutritional quality to a certain extent. The best treatment combination for this test was 2% of biochar with 113 g/ha of tribenuron-methyl. [ABSTRACT FROM AUTHOR]

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In the cross enterprise or cross system environment, the process data is usually recorded in a separate event log, which makes it impossible to mine the complete end-to-end execution process. Therefore, this algorithm proposed to merge the logs only by using the event name and timestamp attributes. First, obtained the process models of the two systems and the merge model according to the cross system follow dependency of activities, then merged the processes of the two systems one-to-one and sorted them according to the timestamp and left the merge processes consistent with the merge model path. Then obtained one-to-one instance pairs from these processes, that is, the only main process could be merged with the only sub process, Then, mined time constraints between activities from these instance pairs for consolidation of remaining logs, and repeated the last two steps until all logs were merged or couldn’t be merged one-to-one. The algorithm was tested on the real event log, and achieved satisfactory merging effect and high precision and recall. [ABSTRACT FROM AUTHOR]

In the Open Source Community, it’s essential to find and recommend suitable participants for newly initiated issues in order to solved the issues and develop the community. This paper proposed to construct a two-layer Graph Attention Network Participant Recommendation Model (GAT-UCG) based on the cooperative relationship records and the historical participated issues records of the developers. The method used to construct the model is obtaining the information of the problem participants and the interaction information of the developers first, and building the developer problem participation graph and the developer collaboration relationship graph respectively, then redistributing the weights to the edges through the attention mechanism, finally, figuring the Top-N recommendation of the problem participants according to the Issue node embedding representation obtained by the output layer. There are 7, 352 issues from popular Github repositories for experiments. The results showed that the GAT-UCG model outperforms the baseline method in three indicators: recommendation accuracy, recall, and F-Score. [ABSTRACT FROM AUTHOR]

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Humidity, as an important drying medium parameter, has significant influence on heat and mass transfer during drying process. It has the most significant influence on the heat and mass transfer during the drying process. Relative humidity (RH) is often used to describe the humidity content of the drying medium under constant drying temperature and atmospheric pressure. The available research reported that the pressure difference of moisture vapor can be enlarged as RH decreased so that the drying force was enhanced for better drying efficiency. Additionally, step-down RH can accelerate the drying rate to prevent surface casehardening in the porous agriculture products whose surfaces were easily crusted during drying. Step-down RH drying means that a high RH is selected to pretreat the material until the temperature increases to a high level, and afterwards a decreased RH with a low value is obtained to increase surface moisture evaporation. Now, step-down RH has been successfully applied into the drying processing of yam slices, and American ginseng root. This study aims to reveal the mechanism for improved drying efficiency with step-down RH drying. Carrot slabs were selected to explore the convective heat transfer (ht), convective mass transfer (hm), and surface micro-pore structure under the drying condition of constant RH and step-down RH with constant drying temperature 60oC and constant air velocity 3.0 m/s. The results showed that the increase of RH significantly enhanced ht, so that the material temperature increased quickly to a high value. With 20%, 30%, 40%, and 50% RH, ht was 42.9, 64.7, 135.1, and 178.9 W/m·, respectively. The ℃ ht value of 50% RH was 3.17 times that of 20% RH. During 0~15 min with 50% RH, the drying rate was small and little moisture was evaporated. The carrot obtained the least amount of heat of 1 159.3 J, of which 33.0% was used for water evaporation. During 0~15 min with 20% RH, the drying rate was high and more moisture was evaporated. The carrot obtained the most amount of heat of 1 387.9 J, of which 64.5% was used for water evaporation. Both absorbed energy and percentage of moisture evaporating decreased as RH increased. The percentage of energy consumption at material temperature increased as RH increased. When the RH was 20%, hm was 1.01×10-6-2.54×10-6 m/s, whereas, when the RH was 50%, hm was 0.26×10-6-1.12×10-6 m/s, indicating that the decreasing RH significantly increased the hm coefficient. When 50% RH was kept 30 min and then decreased to 20%, the hm value was the maximum, compared with the other three holding time with high RH. With 50% RH drying condition, it was beneficial for keeping the material surface porous structure. However, when the RH was 20%, the moisture diffusion duct was easily shrunken and blocked, due to a high drying rate. Therefore, the mechanism of improved drying efficiency with step-down RH drying can be expressed as follows. Firstly, the ht value was improved with the high RH in an increasing stage of drying rate. Secondly, the surface of the porous structure was also well kept with the high RH in the increasing stage of drying rate. Thirdly, the hm increased with the low RH in constant and falling drying rate. Such investigation can be expected to serve as a theoretical foundation to calculate the ht and hm during the drying process. Meanwhile, the specific mechanism of improved drying efficiency can provide technical support for the wide use of step-down RH drying into agriculture products. [ABSTRACT FROM AUTHOR]