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含磷含铝污泥制备聚磷氯化铝工艺研究

广州化工 2024年第1期52卷 149-152页

作者：潘建华朱顺广梁茂杰陈桂歆许晓旋黄跃丹揭阳市斯瑞尔环境科技有限公司广东揭阳522000

以固废含磷含铝污泥、工业盐酸和铝酸钙粉为主要原料,采用溶解和聚合的工艺,制备聚磷氯化铝(PPAC),考察工艺的可行性,以及制得的产品投药量对城镇污水进行絮凝处理实验。结果表明,当工业盐酸中的HCl和含磷含铝污泥中的Al摩尔比为3.3及... 详细信息

以固废含磷含铝污泥、工业盐酸和铝酸钙粉为主要原料,采用溶解和聚合的工艺,制备聚磷氯化铝(PPAC),考察工艺的可行性,以及制得的产品投药量对城镇污水进行絮凝处理实验。结果表明,当工业盐酸中的HCl和含磷含铝污泥中的Al摩尔比为3.3及以上时,污泥可完全溶解成为中间液,从而制得聚磷氯化铝(PPAC);当投药量为50 mg/L(以Al_(2)O_(3)计),对污水COD去除率达70%以上,当投药量为40 mg/L(以Al_(2)O_(3)计),对污水总磷去除率达100%,当投药量为20 mg/L(以Al_(2)O_(3)计),对污水浊度去除率达94.64%。

关键词：含磷含铝污泥聚磷氯化铝水处理剂固废处理

Combined subfascial endoscopic perforator surgery and endovenous laser treatment without impact on the great saphenous vein for management of lower-extremity varicose veins

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Chinese Medical Journal 2013年第3期126卷 405-408页

作者： GAN Shu-jie QIAN Shui-xian ZHANG Ci mao jie-qi LI Ke TANG Jing-dong Department of Vascular Surgery Shanghai First People's Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200080 China

Background Conventional high ligation and stripping of the great saphenous vein （GSV） has a good curative effect but is highly traumatic with a considerable relapse rate. Subfascial endoscopic perforator surgery （SEPS） plus endovenous laser treatment （EVLT） could be applied as individual therapy. This study aimed to evaluate the feasibility of performing combined SEPS and EVLT without impacting GSV in the management of valvular insufficiency of the lower-limb venous perforators. Methods Placement of lower-limb venous perforator insufficiency was marked by ascending phlebography in 83 affected limbs from September 2010 to June 2011. After randomization, SEPS was performed on 41 limbs to address the insufficiency of the venous perforators under the deep fascia, in combination with EVLT to close the superficial varicose veins without impacting the GSV. The remaining 42 limbs were treated using traditional GSV phlebectomy as controls. Results Postoperatively, all varicose veins were resolved, with lightening of the pigmentation and healing of the ulcer. Within a follow-up period of 5-11 months, no symptoms had recurred. Compared with the control group, the operation time, the number of incisions sutured, and the in-hospital time decreased on average by 1.5 hours, 4.7, and 6.8 days, respectively （P 〈0.01 in all cases）. Conclusion Combined SEPS and EVLT for treatment of valvular insufficiency of the lower-limb venous perforators offer the advantages of microtrauma and rapid cure.

关键词： varicose veins perforator, subfascial endoscopic perforator surgery, endoscopic perforator surgery, endovenous laser treatment, endovenous laser treatment

Effect of ulinastatin donor-pretreatment on liver graft during cold preservation in rats

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Chinese Medical Journal 2011年第4期124卷 574-580页

作者： mao jie ZHANG Lin SONG Ai-lin CHEN Xiao ZHANG You-cheng Department of General Surgery Lanzhou University Second Hospital Lanzhou Gansu 730030 China

Background Donor-pretreatment with ulinastatin may influence the liver graft during cold preservation. The aim of this research was to determine whether pretreatment of donor liver with Ulinastatin can attenuate cold preservation injury,and to explore the mechanism by which Ulinastatin affects the donor liver *** One hundred and forty-four Wistar rats were divided into the Ulinastatin treatment group （T group） pretreated with Ulinastatin 50 000 U/kg and control group （C group） treated with 0.9% normal saline via peritoneal injection prior to the anesthetization. After the abdominal cavity was opened and perfused with cold Ringer＇s lactate solution, the liver was harvested. The harvested liver was preserved in cold Ringer＇s lactate solution for 0, 2, 6, 24 hours, at which time the liver tissue was sampled for determination of dry weight and wet weight, Na＋-K＋-ATPase and Ca2＋-ATPase activity, lactic acid dehydrogenase （LDH） activity, lactic acid and malondialdehyde levels. Light microscopy and electron microscopy were used to observe liver morphology. The liver cold-preservation solution was taken for measurement of aspartate aminotransferase （AST） and alanine transaminase （ALT） levels. Correlation between ATPase activity and lactic acid level was analyzed by SPSS 13.0 for *** The morphology in the T group had improved cell boundaries vs. The C group at each time point. Dry weight to wet weight in the T group was lower than in the C group at 6 hours （P 〈0.05）, but the difference was not significant at 24 hours. ALT levels in the T group were lower than that in the C group at 6 hours （P 〈0.05） and 24 hours （P 〈0.01）. AST levels in the T group were lower than those in the C group at 2 hours （P〈0.05）, 6 hours （P 〈0.01） and 24 hours （P 〈0.01）.Na＋-K＋-ATPase activity in the T group was higher than in the C group and the mean difference between two groups was significant at 0 hour （P 〈0.05） and 2 hours （P 〈0.05）. Ca2＋-ATPase activity in the T group was

关键词： Ulinastatin donor pretreatment liver graft cold preservation injury

The relationship between sex hormones and extent of coronary artery disease in postmenopausal women

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Chinese Medical Journal 2007年第1期120卷 71-73页

作者： Odgerel Tumur HAN Jiang-li YANG Chi-sun mao jie-ming Department of Cardiology Peking University Third HospitalBeijing 100083 China Department of Obstetrics and Gynaecology Peking UniversityThird Hospital Beijing 100083 China

The prevalence of coronary artery disease （CAD） in women increases with menopause. Results from the studies on the role of endogenous sex hormones on CAD in postmenopausal women are conflicting. The present study evaluated the relationship between endogenous sex hormones and extent of CAD in postmenopausal women and the associations of sex hormones with CAD risk factors.

关键词： sex hormones coronary artery disease postmenopausal women

基于有效磁链概念的永磁同步电动机新型定子磁链滑模观测器

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中国电机工程学报 2013年第12期33卷 152-158,198页

作者：周扬忠毛洁福州大学电气工程与自动化学院福建省福州市350108

为了改善直接转矩控制(direct torque control,DTC)永磁同步电动机(permanent magnet synchronous motor,PMSM)定子磁链观测性能,该文基于有效磁链概念提出一种定子磁链滑模观测器。以定子静止坐标系中定子电流和有效磁链为状态变量构... 详细信息

为了改善直接转矩控制(direct torque control,DTC)永磁同步电动机(permanent magnet synchronous motor,PMSM)定子磁链观测性能,该文基于有效磁链概念提出一种定子磁链滑模观测器。以定子静止坐标系中定子电流和有效磁链为状态变量构建对应的滑模观测器;根据观测的有效磁链计算出定子磁链。实验结果表明,采用该文提出的观测器可以获得比开环观测器精度更高的定子磁链观测值;所提观测器对电机电感的变化有较强的鲁棒抑制能力;采用所提观测器的PMSM DTC驱动系统可以工作于半载7.5r/min。

关键词：直接转矩控制永磁同步电动机滑模理论有效磁链定子磁链观测器

套管-水泥界面微间隙厚度的低频超声反演方法

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声学学报 2014年第4期39卷 467-472页

作者：韩炜毛捷金士杰中国科学院声学研究所声场声信息国家重点实验室北京100190

研究了应用低频超声垂直入射反射波实现套管-水泥界面流体微间隙薄层厚度的反演方法。应用灵敏度函数比较分析了分层系统反射谱各阶谐振频率处的相位跳变量较之各阶谐振频率作为反演特征量的优势。通过目标函数分析,选取分层系统3~10阶... 详细信息

研究了应用低频超声垂直入射反射波实现套管-水泥界面流体微间隙薄层厚度的反演方法。应用灵敏度函数比较分析了分层系统反射谱各阶谐振频率处的相位跳变量较之各阶谐振频率作为反演特征量的优势。通过目标函数分析,选取分层系统3~10阶谐振频率处相位跳变量作为特征量,利用BP神经网络实验获得0.1~1.0 mm内不同间隙层厚度的反演结果。反演结果与真实值的平均相对误差为4.6%,最小反演厚度仅为波长的18%。所选取的相位特征量也可用于其它层状高声阻抗介质下的薄层厚度反演。

关键词：低频超声反演方法微间隙相位跳变谐振频率函数分析相位特征特征量分层系统平均相对误差

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论公民法治信仰的培育路径

中州学刊 2016年第10期 59-62页

作者：毛杰清华大学教育研究院

树立法治信仰是践行社会主义核心价值观的应有之义,也是全面推进依法治国的基础工程。在现代社会,法治不能仅是一种治理方式和规范公民行为的制度体系,还应成为社会公众普遍信仰的理念。在当代中国,明晰法治信仰的科学内涵和价值功能,... 详细信息

树立法治信仰是践行社会主义核心价值观的应有之义,也是全面推进依法治国的基础工程。在现代社会,法治不能仅是一种治理方式和规范公民行为的制度体系,还应成为社会公众普遍信仰的理念。在当代中国,明晰法治信仰的科学内涵和价值功能,正视公民在法治信仰方面存在的问题,从吸收优秀传统法治文化、健全普法教育机制、完善法律制度、强化权利意识等方面促成公民对法律价值的强烈认同,是培育公民法治信仰的可行路径。

关键词：依法治国法治信仰实现路径

WTO补贴规则与我国企业所得税优惠政策的冲突与协调

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涉外税务 2006年第5期215卷 30-34页

作者：毛杰宁波市国税局浙江宁波315041

税收优惠被列为WTO《补贴与反补贴措施协议》规定的补贴之一。该协议规定了禁止性补贴、可申诉补贴和不可申诉补贴。我国现行企业所得税优惠政策多为入世前所制定,较少考虑与WTO规则的接轨,不可避免地存在与上述协议不相符合之处,应当按... 详细信息

税收优惠被列为WTO《补贴与反补贴措施协议》规定的补贴之一。该协议规定了禁止性补贴、可申诉补贴和不可申诉补贴。我国现行企业所得税优惠政策多为入世前所制定,较少考虑与WTO规则的接轨,不可避免地存在与上述协议不相符合之处,应当按照WTO的规则加以协调。

关键词：补贴与反补贴措施协议企业所得税优惠政策协调

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新疆公路三级自然区划的影响因素

长安大学学报（自然科学版） 2007年第5期27卷 49-52页

作者：田茂杰长安大学特殊地区公路工程教育部重点实验室陕西西安710064

为了使新疆公路自然区划的二级分区更加合理,以满足不同地域的公路建设需要,在新疆公路自然区划一、二级分区及适应性分析的基础上,按照新疆公路自然条件地貌构造的区域性、气候的纬向地带性、两大盆地的水平地带性和三大山地的垂直地... 详细信息

为了使新疆公路自然区划的二级分区更加合理,以满足不同地域的公路建设需要,在新疆公路自然区划一、二级分区及适应性分析的基础上,按照新疆公路自然条件地貌构造的区域性、气候的纬向地带性、两大盆地的水平地带性和三大山地的垂直地带性等自然规律,提出了新疆公路三级区划考虑因素和区划标志,确定了新疆公路自然区划的三级分区。实践表明,新疆公路二级区划的6个二级区和两个副区可划分为27个三级区。

关键词：道路工程自然区划区域性地带性地方性三级分区