An Insect Imaging System to Automate Rice Light-Trap Pest Identification

Identification and counting of rice light-trap pests are important to monitor rice pest population dynamics and make pest forecast. Identification and counting of rice light-trap pests manually is time-consuming, and leads to fatigue and an increase in the error rate. A rice light-trap insect imaging system is developed to automate rice pest identification. This system can capture the top and bottom images of each insect by two cameras to obtain more image features. A method is proposed for removing the background by color difference of two images with pests and non-pests. 156 features including color, shape and texture features of each pest are extracted into an support vector machine （SVM） classifier with radial basis kernel function. The seven-fold cross-validation is used to improve the accurate rate of pest identification. Four species of Lepidoptera rice pests are tested and achieved 97.5% average accurate rate.

基于HMGB1-RAGE信号通路研究奥拉米特预防抗结核药物性肝损伤的作用机制

目的:初步探讨奥拉米特预防抗结核药物性肝损伤(ATB-DILI)的可能机制。方法:将60只昆明小鼠随机分为空白组、模型组、阳性对照组[甘草酸二铵60 mg/(kg·d)]和奥拉米特低、中、高剂量组[80、160、320 mg/(kg·d)],每组10只。除空白组外,其余各组小鼠均灌胃异烟肼[75 mg/(kg·d)]+利福平[75 mg/(kg·d)]14 d以复制ATB-DILI模型。与此同时,各给药组小鼠灌胃相应药液,空白组和模型组小鼠灌胃生理盐水,给药体积均为20 mL/(kg·d),每天给药1次,连续给药14 d。每天观察并记录小鼠生长发育、精神状态、饮食等一般情况。末次给药后,计算其肝指数,以苏木精-伊红(HE)染色法观察小鼠肝组织病理学改变,采用链霉抗生物素蛋白-生物素-过氧化物酶复合物(SABC)免疫组化法检测其肝组织中高速泳动族蛋白B1(HMGB1)、核因子κB(NF-κB)的阳性表达情况,采用酶联免疫吸附法检测其血清中肝功能指标水平和肝组织中晚期糖基化终末产物受体(RAGE)、肿瘤坏死因子α(TNF-α)的表达情况。结果:与空白组比较,模型组小鼠生长发育迟缓,食欲、精神等差,肝指数和血清中总胆红素、直接胆红素、丙氨酸转氨酶、天冬氨酸转氨酶、碱性磷酸酶(ALP)、总胆汁酸(TBA)、γ-谷氨酰转肽酶水平均显著升高(P<0.05);肝小叶结构紊乱,肝细胞变性、坏死,并伴炎症细胞浸润;肝组织中HMGB1、NF-κB、RAGE、TNF-α的表达均显著增强(P<0.05)。与模型组比较,奥拉米特低、中、高剂量组和阳性对照组小鼠的一般情况均有不同程度好转,肝指数和上述血清指标均显著降低(P<0.05),肝组织病理学变化均有不同程度改善,肝组织中HMGB1、NF-κB、RAGE、TNF-α的表达均显著降低(P<0.05),且奥拉米特高剂量组上述指标改善效果均显著优于奥拉米特低、中剂量组(P<0.05),ALP、TBA水平显著低于阳性对照组(P<0.05)。结论:奥拉米特能够预防异烟肼联合利福平所致的小鼠ATB-DILI,其机制可能与下调肝组织HMGB1和RAGE蛋白表达、抑制炎症因子分泌有关。

高级驾驶辅助系统在纯电动重型牵引车上的应用

结合一款纯电动重型牵引车产品,介绍此重型牵引车装载的高级驾驶辅助系统的主要功能和组成,并分析该系统的基本控制策略。

Determination of Polyol Content in CSF of Patients with Braintumor and Clinical Implication（脑肿瘤病人脑脊液中多元醇的含量测定及其临床价值）

目的 测定和比较脑肿瘤病人及非脑肿瘤病人脑脊液中果糖等多元醇的含量，以了解它们在脑肿瘤生化代谢过程中的作用。方法 采用日本岛津高效气相色谱仪，对40例脑肿瘤病人和15例对照组病人脑脊液中果糖、葡萄醇、肌醇及甘露醛4种多元醇含量进行了测定，并进行统计学分析比较。结果 脑肿瘤组脑脊液中多元醇浓度明显高于对照组(P<0．01)；恶性脑肿瘤脑脊液中多元醇含量高于良性脑肿瘤(P<0．01)；术前高于术后。结论 脑脊液中的多元醇，特别是果糖和葡萄醇与脑肿瘤生长代谢有密切关系，或许在脑肿瘤生长代谢过程中起着重要作用。Objective To determine and compare polyol contents in CSF of the patients with braintumor and those without braintumor in order to know their roles in the course of biochemical metabolism of braintumor.Methods The contents of 4 kinds of polyol (fructose, glucitol, inositol and mannose) in CSF of 40 braintumor patients and 15 controls were determined by the gas chromatograph made in Japan.Results The concentration of polyol in CSF of braintumor group was obviously higher than in control group (P < 0.01 ), and it was higher in CSF of the malignant braintumor patients than that in CSF of benign braintumor patients (P <0.01 ). The preoperative content was higher than postoperative one.Conclusion It is concluded that polyol in CSF, especially fructose and glucitol, has a close relationship with the growth and metabolism of braintumor, and it may play an important role in the growth and metabolism course of braintumor.

提高硫化物纺锤化及弥散化的研究

钙处理及铝脱氧操作优化硫化物形态进行工业对比试验研究,利用扫描电镜对圆材中硫化物的等级、形态、成分类型统计分析。研究结果表明:钙处理及加入铝脱氧剂以后能够使钢中形成更多的mCaO·nAl_(2)O_(3)化合物,在钢液凝固的过程中成为MnS形核的核心,降低了MnS的形核能,促使了硫化物在氧化物颗粒表面析出和长大,也改变了硫化物在轧制锻造过程中的变形状态,即被拉断形态,使长条状MnS变性为纺锤状硫化物,同时分布更加的弥散化。工业生产中采用钙处理及铝脱氧操作来最终控制钢中硫化物的纺锤化和弥散化是可行的。