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Retroperitoneoscopic approach for partial nephrectomy in children with duplex kidney: A case report

World Journal of Clinical Cases 2019年第10期7卷 1169-1176页

作者： Di-xiang Chen zi-Hao wang Shan-Jie wang Yue-Yue Zhu Nan Li xian-Qiang wang Department of Pediatrics PLA General HospitalBeijing 100853China The Fourth Military Medical University Xi’an 710032Shannxi ProvinceChina The Sixth People’s Hospital of Jinan Affiliated to Jining Medical School Jinan 250200Shandong ProvinceChina Southern Medical University Guangzhou 510515Guangdong ProvinceChina Department of Ultrasound Diagnosis PLA General HospitalBeijing 100853China

BACKGROUND Renal duplication is a common deformity of the urinary system,with an incidence of approximately 1/125 in *** patients with hydronephrosis,vesicoureteral reflux,or incontinence may require surgical *** and retroperitoneoscopy are the two main accesses for partial *** SUMMARY A 9-year-old child was admitted to the hospital for hydronephrosis of the left *** showed that the left kidney was larger,approximately 12.6 cm×6.3 cm×5.5 cm in size,with visible separation of the pelvis and an obviously separated lower *** upper segment of the left ureter was dilated(approximately 2.6 cm in width),and no significant dilation was observed in the middle and upper *** right kidney and ureter were *** diagnosis was left renal duplication malformation and *** laparoscopic nephrectomy and ureterectomy were *** exploration revealed a dilated pelvis and thin renal parenchyma at the lower pole of the left *** upper left kidney was smaller than normal,and the pelvis and ureter were larger than *** renal artery was blocked for 40 min.A hemolock was used to clamp down the kidney ureter,and a drainage tube was retained in the retroperitoneal *** operation was uneventful,and the estimated amount of blood loss was 100 *** abdominal drainage amount was 116 *** drainage tube was removed on postoperative day(POD)3 and the patient was discharged on *** pathological diagnosis confirmed the atrophy of the renal parenchyma,the dilation of the renal pelvis,hydronephrosis,and ureteral cystic *** The retroperitoneoscopic approach for partial nephrectomy is feasible and effective in selective pediatric patients with a duplex kidney.

关键词： Retroperitoneoscopy Duplex kidney Nephrectomy Pediatric Case report

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探究性实验的逆向教学设计:以乙酸乙酯制备为例

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中小学实验与装备 2024年第3期34卷 29-33页

作者：朱加贤洪兹田福建省厦门外国语学校 361012 福建省厦门市翔安第一中学 361101

长期以来,探究性实验一般拘于“目标-教学-评价”的设计逻辑过程,其最大问题是实验的开放度与预期目标难吻合,实验的开放度与实验评价不契合,这些导致探究效果不明显。而基于逆向教学设计的探究性实验,将预期目标与探究的开放性有效融合... 详细信息

长期以来,探究性实验一般拘于“目标-教学-评价”的设计逻辑过程,其最大问题是实验的开放度与预期目标难吻合,实验的开放度与实验评价不契合,这些导致探究效果不明显。而基于逆向教学设计的探究性实验,将预期目标与探究的开放性有效融合,探究的目的性更明确,实验的评价也更加具体,效果更明显。以乙酸乙酯制备为例,对比日常探究教学设计和逆向教学设计的流程,重点阐释了遵循“目标-评价-教学”逻辑的逆向教学设计流程。从预估实验结果、注重教学评价、设计表现性任务及开展探究性实验能较好地实现“教-评-学”一体化,有效培养了学生的高阶思维和创新能力。

关键词：核心素养探究性实验逆向教学设计乙酸乙酯

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基于多尺度特征融合的航空发动机剩余寿命预测

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航空发动机 2024年第4期50卷 114-120页

作者：秦子轩张晓东白广芝任先聪中国石油大学(华东)计算机科学与技术学院山东青岛266580

针对航空发动机原始数据中存在多样化退化信息及大量噪声干扰的问题,建立了一种基于多尺度特征融合的发动机剩余可用寿命(RUL)预测模型。构建了一种基于统计量的方法来降低原始数据中的噪声干扰;基于卷积双向长短期记忆网络(ConvBiLSTM... 详细信息

针对航空发动机原始数据中存在多样化退化信息及大量噪声干扰的问题,建立了一种基于多尺度特征融合的发动机剩余可用寿命(RUL)预测模型。构建了一种基于统计量的方法来降低原始数据中的噪声干扰;基于卷积双向长短期记忆网络(ConvBiLSTM)和多头注意力机制(Multi-Attention)设计了加权时空特征提取模块(WSTFEM);采用多尺度学习策略,构建多尺度卷积双向长短期记忆网络(MCBLSTM)提取数据在不同时间尺度下的加权时空特征;提取数据手工特征为RUL预测提供具有针对性和解释性的退化信息;将上述特征进行特征融合后输入至全连接网络获得RUL预测值。以FD004子集为例,使用C-MAPSS数据集对模型进行仿真试验验证。结果表明:MCBLSTM模型在4个子数据集上RUL预测精度更高。相较于BiLSTM,均方根误差减小了20.35%,非对称评分函数下降了54.76%。

关键词：深度学习多头注意力机制多尺度卷积双向长短期记忆网络剩余可用寿命航空发动机

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Effect of Thermomechanical Control Processing on Microstructure and Mechanical Properties of Fe-0.2C-1.44Si-1.32Mn Hot Rolled TRIP Steel

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Journal of Iron and Steel Research International 2010年第7期17卷 44-50页

作者： ZHANG zi-cheng ZHU Fu-xian LI Yan-mei State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

The effect of thermomechanical control processing（TMCP）on microstructure and mechanical properties of Fe-0.2C-1.44Si-1.32Mn hot rolled TRIP steel was investigated through ***-induced transformation and transformation-induced plasticity behavior of retained austenite were *** results show that with multipass deformation,reduction per pass of more than critical deformation in austenite recrystallization region and total reduction of more than 58% in non-recrystallization region and high temperature section of two-phase region,austenite can be refined before γ→α *** is beneficial to obtain refined ferrite grain in final *** obtain fine and uniform microstructure and excellent strength-ductility balance,a three-stage cooling process（laminar cooling-air cooling-ultra-fast cooling）after hot rolling was *** ultimate tensile strength and elongation of the investigated steel can reach 663 MPa and 41%,respectively.

关键词： hot rolled TRIP steel TRIP effect retained austenite transformation-induced plasticity mechanical property

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A Two-Lane Cellular Automata Model with Influence of Next-Nearest Neighbor Vehicle

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Communications in Theoretical Physics 2006年第4期45卷 657-662页

作者： KONG xian-Juan GAO zi-You LI Ke-Ping School of Traffic and Transportation Beijing Jiaotong University Beijing 100044 China

In this paper, we propose a new two-lane cellular automata model in which the influence of the next-nearest neighbor vehicle is considered, The attributes of the traffic system composed of fast-lane and slow-lane are investigated by the new traffic model. The simulation results show that the proposed two-lane traffic model can reproduce some traffic phenomena observed in real traffic, and that maximum flux and critical density are close to the field measurements. Moreover, the initial density distribution of the fast-lane and slow-lane has much influence on the traffic flow states. With the ratio between the densities of slow lane and fast lane increasing the lane changing frequency increases, but maximum flux decreases. Finally, the influence of the sensitivity coefficients is discussed.

关键词： cellular automata car-following model double look-ahead model

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Solvent-Controlled Construction of Molecular Chains and Bowls/Sieves from a Bent Dipyridyl Ligand

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Chinese Journal of Chemistry 2021年第9期39卷 2523-2528页

作者： Xiao-Yun Tian Xiao-xian Chen Chao wang zi-Ming Ye Dong-Dong Zhou Jie-Peng Zhang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistrySun Yat-Sen UniversityGuangzhouGuangdong 510275China

Solvothermal reactions of 3,6-di(pyridin-4-yl)-9H-carbazole(dpc)with Cu(ll)yielded crystals of two new coordination complexes,namely[Cu(CH_(3)COO)_(2)(dpc)(H_(2)O)_(2)]n-xGuest(1)and[Cu_(13)(HCOO)_(16)(dpc)16(H_(2)O)6](HCOO)10-Guest(2),in which CH_(3)COO_and HCOO-were generated from the hydrolysis of the solvents A/zAZ-dimethylacetamide(DMA)and A/zA/-dimethylformamide(DMF),***-crystal X-ray diffraction showed that 1 possesses simple wavy coordination chains,while 2 possesses large molecular bowls/sieves with outer and inner effective sizes of 30.2 × 30.2 × 25.5 A^(3) and 15.0 × 15.0 × 18.6 A^(3),respectively,which consists of 4 linear Cu_(3)(HCOO)_(4)(H_(2)O)clusters and 12 dpc ligands as the square-shaped wall and a claw-like Cu(dpc)_(4) fragment as the ***-free 2 can adsorb considerable amounts of CO_(2)/H_(2)O and CH_(3)OH but completely exclude C2H4 and C3H6z which shows a potential application for olefin drying.

关键词： Self-assembly Crystal engineering Microporous materials Molecular sieve Olefin drying

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Therapy to Obese Type 2 Diabetes Mellitus:How Far Will We Go Down the Wrong Road?

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Chinese Journal of Integrative Medicine 2020年第1期26卷 62-71页

作者： HENG xian-pei LI Xiu-jun LI Liang YANG Liu-qing wang zi-ta HUANG Su-ping Department of Endocrinology People's Hospital Affiliated to Fujian University of Traditional Chinese MedicineFuzhou 350004China West China Medical Center of Sichuan Medical University(West China University of Medical Science) Chengdu 610041China Academy of Integrative Medicine Fujian Fujian University of Traditional Chinese MedicineFuzhou 350122China

Traditional glucose-lowering chemical agents, including various types of insulin and insulin secretagogues, insulin sensitizers, gliptins, etc., are based on diabetic pathogenesis of insulin resistance(IR) and islet insufficiency. Numerous evidence-based medical studies have shown that these traditional hypoglycemic chemical agents do not provide cardiovascular benefit to patients with type 2 diabetes mellitus(T2 DM) and may even increase the risk of all-cause mortality. Based on research evidence published to date, these studies show that overload of energy could increase the incidence and prevalence of T2 DM, and reduction in the heat load can significantly reduce the incidence of T2 DM. Therefore, the essence of T2 DM is heat overload, meaning heat overload is the etiology of obese T2 DM. At the same time, results of numerous studies show that heat overloading is the cause of IR. IR and islet dysfunction are protective factors in intervening with heat *** drugs, which are based on the mechanisms of IR and islet insufficiency, increase caloric reserve and cause or worsen obesity, which is equivalent to exacerbating the basic etiology and the cardiovascular risk factor of T2 DM. Thus, a reasonable strategy for prevention and treatment of obese T2 DM appears to promote the negative balance of calories and the elimination of caloric reserves. Chinese herbal medicines can promote negative balance of heat in many aspects, which can bring new hope for prevention and treatment of T2 DM.

关键词： obese type 2 diabetes mellitus etiology prevention and treatment Chinese herbal medicine

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Alloying Design for High Wear-Resistant Cast Hot-Forging Die Steels

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Journal of Iron and Steel Research International 2008年第4期15卷 67-72页

作者： CUI xiang-hong SHAN Jun YANG zi-run WEI Min-xian wang Shu-qi DONG Chuang School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 Jiangsu China Harbin Zhuoyue Information Technology Advance Limited Company Harbin 150001 Heilongjiang China State Key Laboratory of Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian 116024 Liaoning China

The alloying design of cast hot-forging die steels was analyzed. The relationship of the life of cast hot-forging dies with the failure patterns was studied. The thermal wear resistance was believed to be the key property for the alloying design of cast hot-forging die steels. The alloying design parameters were selected and optimized for the cast hot-forging die steel with high wear resistance. The wear resistance of the optimized cast die steel was evaluated in comparison with commercial H13 steels and 3Cr2WSV steel. In the new cast hot-forging die steel, VC is predominant carbide with Cr and Mo as the main solution elements in α-Fe. It is found that the cast die steel has significantly lower wear rate than normal H13 steel and 3Cr2W8V steel, almost the same as that of high purity H13 steel. The high wear resistance of the new cast hot-forging die steel can be attributed to its reasonable alloying design and nonsensibility to the detrimental function of S and P.

关键词： hot-forging die cast steel wear resistance alloying design

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自适应平台直方图高动态范围红外图像显示方法

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激光与红外 2024年第7期54卷 1086-1089页

作者：朱金华李科邵先军孙子林王少华李特姜凯华国网浙江省电力有限公司浙江杭州310014 天津津航技术物理研究所天津300308 国网浙江省电力有限公司电力科学研究院浙江杭州310014

针对不同场景高动态范围红外图像的自适应显示方法问题,提出了一种基于图像分割的自适应平台直方图显示方法,首先进行图像分割,再根据分割结果讨论平台阈值的选取,并分析了平台阈值的选取依据。试验结果表明本文方法对不同场景均获得了... 详细信息

针对不同场景高动态范围红外图像的自适应显示方法问题,提出了一种基于图像分割的自适应平台直方图显示方法,首先进行图像分割,再根据分割结果讨论平台阈值的选取,并分析了平台阈值的选取依据。试验结果表明本文方法对不同场景均获得了良好显示效果,具备实用性。

关键词：红外图像高动态范围平台直方图自适应平台值

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Effect of diboron trioxide on the crushing strength and smelting mechanism of high-chromium vanadium–titanium magnetite pellets

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International Journal of Minerals,Metallurgy and Materials 2017年第11期24卷 1228-1240页

作者： Gong-jin Cheng zi-xian Gao He Yang xiang-xin Xue School of Metallurgy Northeastern University Shenyang 110819 China Liaoning Key Laboratory of Recycling Science for Metallurgical Resources Shenyang 110819 China

The effect of diboron trioxide(B_2O_3) on the crushing strength and smelting mechanism of high-chromium vanadium–titanium magnetite pellets was investigated in this work. The main characterization methods were X-ray fluorescence, inductively coupled plasma–atomic emission spectroscopy, mercury injection porosimetry, X-ray diffraction, metallographic microscopy, and scanning electron microscopy–energy-dispersive X-ray spectroscopy. The results showed that the crushing strength increased greatly with increasing B_2O_3 content and that the increase in crushing strength was strongly correlated with a decrease in porosity, the formation of liquid phases, and the growth and recrystallization consolidation of hematite crystalline grains. The smelting properties were measured under simulated blast furnace conditions; the results showed that the smelting properties within a certain B_2O_3 content range were improved and optimized except in the softening stage. The valuable element B was easily transformed to the slag, and this phenomenon became increasingly evident with increasing B_2O_3 content. The formation of Ti(C,N) was mostly avoided, and the slag and melted iron were separated well during smelting with the addition of B_2O_3. The size increase of the melted iron was consistent with the gradual optimization of the dripping characteristics with increasing B_2O_3 content.

关键词： high-chromium vanadium–titanium magnetite pellets diboron trioxide crushing strength smelting mechanism

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