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Analysis of the treatment outcomes of esophageal variceal bleeding patients from multiple centers in China

WANG Zhiqiang

《医学前沿(英文)》 2008年 第2卷 第2期   页码 171-173 doi: 10.1007/s11684-008-0031-0

摘要: This study aimed to investigate the treatment outcomes of esophageal variceal bleeding (EVB) in China. A total of 1087 cases were collected from 19 hospitals in 16 large and medium sized cities across China between January 1st, 2005 and January 1st, 2006. There were 313 cases (29.0%) of mild (<400 mL), 494 cases (45.8%) of moderate (400–1500 mL) and 272 cases (25.2%) of severe (>1500 mL) bleeding. Successful hemostasis was achieved in 89.8% of cases. Seven hundred and eighty-five cases were treated by medication with a hemostasis rate of 91.8%. Seventy-one cases were treated using a Sengstaken-Blakemore tube with a hemostasis rate of 54.9%. Thirty-seven cases were treated with emergency endoscopic variceal ligation with a hemostasis rate of 83.8%. Seventy-seven cases were treated with endoscopic sclerotherapy with a hemostasis rate of 94.8%. Forty-three cases were treated with emergency surgical operation with a hemostasis rate of 95.3%. Sixty-six cases were treated with combined therapy with a hemostasis rate of 97.0%. There was a significant difference ( < 0.01) in the successful hemostasis rate between different treatments. The overall mortality was 10.1%, among which 6.6% was directly caused by bleeding. The multivariate logistic regression analysis shows that the severity of bleeding, treatment methods, liver dysfunction and activation of hepatitis were predictive factors for successful hemostasis. Most cases of EVB were mild and moderate in severity. The first-line treatment for EVB is medication. Emergency endoscopic intervention has not been widely available yet. The overall management outcome of EVB has been improved.

关键词: significant difference     predictive     medication     first-line treatment     bleeding    

Effect of oxytocin on gastric ischemia-reperfusion injury in rats

ZHANG Wenwen, ZHANG Jianfu, ZHANG Yongmei, XU Ming

《医学前沿(英文)》 2007年 第1卷 第4期   页码 433-437 doi: 10.1007/s11684-007-0085-4

摘要: The effect of peripherally administered oxytocin (OT) on gastric ischemia-reperfusion injury (GI-RI) and its possible mechanism were investigated. The Sprague-Dawley (SD) rats were randomly divided into different treatment groups ( = 6). The animal GI-RI model was established by clamping the celiac artery for 30 min to induce ischemia and then released to allow reperfusion for 1 h, and the degree of GI-RI was assessed by scoring the gastric mucosal damage index (GMDI), the gastric fluid output, gastric fluid output, gastric acidity were measured and the surgical preparations of vagotomy and sympathectomy were used to investigate the possible mechanism of OT on GI-RI. The results were as follows. Compared with the control group (NS plus GI-R only, GMDI 121.33±10.40, = 6), the intra peritoneal (ip) administration of oxytocin (20, 100 μg/0.5 mL) obviously attenuated GI-RI (<0.05), GMDI were 82.33±14.26, 53.5±5.58 respectively ( = 6); the gastric fluid output and the gastric acidity (evaluated by pH) of the control group were (430.17±87.36) μL, 1.55±0.25 ( = 6), and those of the OT group were (102.45±48.00) μL, 2.65±0.40 ( = 6) res pectively; differences had statistical significance (<0.01). The effect of oxytocin was reversed by atosiban, a selective oxytocin receptor antagonist. The GMDI of the group given atosiban 10 min before OT was 138.17±24.06 ( = 6), which had no significant difference with the control group. Oxytocin further attenuated GI-RI after vagotomy and sympathectomy (GMDI 6.83±8.89, 29.67±5.54, = 6), compared with the GI-R group and the oxytocin group (<0.01). These results indicated that the oxytocin could significantly protect gastric mucosal against injury induced by ischemia-reperfusion, and the oxytocin receptor was involved. This effect of oxytocin may be mediated through the vagus and sympathetic nerve, and then lead to the reduction of gastric juice output and the depression of gastric acidity.

关键词: control     significant difference     surgical     statistical significance     Sprague-Dawley    

Effect of intestinal ischemia/reperfusion injury on leptin and orexin-A levels

LIN Ji, YAN Guangtao, HAO Xiuhua, ZHANG Kai, GAO Xiaoning, LIAO Jie

《医学前沿(英文)》 2007年 第1卷 第1期   页码 87-92 doi: 10.1007/s11684-007-0017-3

摘要: The aim of this paper is to explore the effect of intestinal ischemia/reperfusion (I/R) injury on leptin and orexin-A levels in peripheral blood and central secretory tissues, and to examine the roles of leptin and orexin-A in acute inflammatory responses. An intestinal I/R injury model of rats was made; the rats were grouped according to the time of after 60 min ischemia. Radioimmunoassay was employed to detect the levels of leptin in serum and adipose tissue and orexin-A levels in plasma and hypothalamus. Reverse transcriptase-polymerase chain reaction was used to detect mRNA expressions of adipose leptin and hypothalamus orexin-A. Compared with the levels before the injury, serum leptin in 60 min ischemia/30 min reperfusion (I60´R30´) group decreased and that of I60´R360´ group increased. Compared with sham-operation group (sham group) after injury, serum leptin level of I60´R360´ group increased, adipose leptin levels of I60´R30´ and I60´R90´ decreased, and adipose leptin in I60´R360´ group increased. After the injury, adipose leptin mRNA expressions of I60´R30´, I60´R240´ and I60´R360´ increased, whereas that of I60´R150´ group decreased as compared with the sham group. There was no significant difference in the protein levels of orexin-A, either between plasma and hypothalamus or between pre- and post-I/R injury. Compared with sham group, hypothalamus orexin-A mRNA expressions of I60´R30´ and I60´R90´ decreased gradually after the injury, with that of I60´R150´ group reaching the lowest, and those of I60´R240´ and I60´R360´ recovering gradually, although they were still significantly lower than that of sham group. Leptin and orexin-A respond to intestinal I/R injury in a time-dependent manner, with leptin responding more quickly than orexin-A does, and both of them may contribute to the metabolic disorders in acute inflammation.

关键词: significant difference     intestinal I/R     transcriptase-polymerase     metabolic     central secretory    

Clinical study on the related markers of blood coagulation in the patients with ANFH after SARS

WU Lianhua, GAO Chunjin, WANG Guozhong, YANG Lin, HOU Xiaomin, GE Huan, XIA Chengqing, QI Man

《医学前沿(英文)》 2007年 第1卷 第4期   页码 410-412 doi: 10.1007/s11684-007-0080-9

摘要: The aim of this research was to investigate the blood coagulation function in the patients with avascular necrosis of the femoral head (ANFH) after severe acute respiratory syndrome (SARS). The expression of CD31, CD61, CD62p, CD63 and PAC-1 on platelet membrane was measured respectively by flowcytometry, and the plasma prothrombin time (PT), activated partial thromboplastin time (APTT), thrombin time (TT) and fibrinogen (Fbg) were measured by blood clotting instrument in 26 patients with ANFH after SARS and in 17 healthy adults. The expression of CD31, CD61, CD 62p, CD63 and PAC-1 on platelet membrane in 26 patients was all lower than that in 17 healthy subjects (<0.01). The levels of PT, APTT, TT and Fbg in 26 patients were all normal. There is no significant difference (>0.05) in those markers between patients and 17 healthy adults. The blood may not be in hypercoagulable state in patients with ANFH after SARS.

关键词: significant difference     partial thromboplastin     coagulation function     femoral     healthy    

Abnormal glycosylated hemoglobin as a predictive factor for glucose metabolism disorders in antipsychotic treatment

XU Leping, JI Juying, DUAN Yiyang, SHI Hui, ZHANG Bin, SHAO Yaqin, SUN Jian

《医学前沿(英文)》 2007年 第1卷 第3期   页码 316-319 doi: 10.1007/s11684-007-0061-z

摘要: The aim of this study was to observe the changes in glucose metabolism after antipsychotic (APS) therapy, to note the influencing factors, as well as to discuss the relationship between the occurrence of glucose metabolism disorders of APS origin and abnormal glycosylated hemoglobin (HbAc) levels. One hundred and fifty-two patients with schizophrenia, whose fasting plasma glucose (FPG) and 2-h plasma glucose (2hPG) in the oral glucose tolerance test (2HPG) were normal, were grouped according to the HbAc levels, one normal and the other abnormal, and were randomly enrolled into risperidone, clozapine and chlorpromazine treatment for six weeks. The FPG and 2hPG were measured at the baseline and at the end of the study. In the group with abnormal HbA1c and clozapine therapy, 2HPG was higher after the study [(9.5±1.8) mmol/L] than that before the study [(7.2±1.4) mmol/L] and the difference was statistically significant (〈0.01). FPG had no statistically significant difference before and after the study in any group (〉0.05). HbAc levels and drugs contributing to 2HPG at the end of study had statistical cross-action (〈0.01). In the abnormal HbAc group, 2HPG after the study was higher in the clozapine treatment group [(9.5±1.8) mmol/L] than in the risperidone treatment group [(7.4±1.7) mmol/L] and the chlorpromazine treatment group [(7.3±1.6) mmol/L]. The differences were statistically significant (〈0.01). In the normal HbAc group there was no statistically significant difference before and after the study in any group (〉0.05). 2HPG before [(7.1±1.6) mmol/L] and after the study [(8.1±1.9) mmol/L] was higher in the abnormal HbAc group than in the normal HbAc group [(6.2±1.4) mmol/L (6.5±1.4) mmol/L] with the difference being statistically significant (〈0.01 〈0.001). As compared with normal HbAc group, the relative risk (RR) of glucose metabolism disease occurrence was 4.7 in the abnormal HbAc group with the difference being statistically significant (〈0.001). Patients with abnormal HbAc are more likely to have a higher risk of having glucose metabolism disorders after APS treatment.

关键词: significant difference     occurrence     hemoglobin     risperidone treatment     abnormal    

Observations on pathological and histochemical changes in piglet livers infected with Taenia saginata asiatica

LINGHU Yan, ZHU Wujun, BAO Huai′en, CHEN Yan

《医学前沿(英文)》 2007年 第1卷 第3期   页码 258-263 doi: 10.1007/s11684-007-0049-8

摘要: To study the pathological and histochemical characteristics of lesions in piglet livers infected with () throughout the different stages, piglets were fed with eggs of and raised in isolation in an animal center to establish the infection model with normal piglets as control. The pathological changes in the piglet livers were observed after the infection using liver sections stained with hematoxylin and eosin. Histochemical methods were used to check the changes in lipid, glycogen and protein content in the liver. The data collected by image analysis were analyzed statistically with Statistical Package for the Social Science. The results show that -exposed piglets were indeed infected. Inflammatory reactions began on the fourth day and progressed rapidly. Kupffer cell hyperplasia, hepatic hydropic degeneration and ballooning degeneration were found in the 10th 20th days after infection. Hepatic central veins and hepatic sinusoids were dilated and congested. Spotty necrosis occurred in some local liver tissues. In the 40th–60th days, granulomatous reactions and mild hepatocirrhosis were the main lesions. In the 70th–80th days, hepatocirrhosis and bile duct proliferation were observed in the liver. In the different stages, lipid drops were increased while glycogen and protein levels were decreased to some degree. There was a significant difference in metabolism between the infected group and the control group (〈0.01). It is concluded that pigs are the favorable intermediate host of and its infection can result in serious pathological and histochemical lesions in host organs.

关键词: hydropic degeneration     significant difference     -exposed     favorable intermediate     different    

Improved local control without elective nodal radiotherapy in patients with unresectable NSCLC treated by 3D-CRT

YANG Kunyu, LIU Li, ZHANG Tao, WU Gang, CAO Fengjun, WANG Jianhua

《医学前沿(英文)》 2007年 第1卷 第4期   页码 381-385 doi: 10.1007/s11684-007-0074-7

摘要: To investigate the influence of prophylactic elective nodal irradiation on the therapeutic results of definitive radiotherapy for patients with stage IIIA or stage IIIB unresectable non-small-cell lung cancer, 55 patients with clinically inoperable advanced non-small-cell lung cancer were studied. After four cycles of induction chemotherapy, the patients were divided into two groups at random. In one group, the elective nodal irradiation was included in clinical tumor volume (CTV) of definitive radiotherapy (ENI group); and in the other group, elective nodal irradiation was not included in CTV (non-ENI group). For the patients in the ENI group, the mean prescription dose for gross tumor volumes was 58.4 Gy, while for the patients in the non-ENI group, it was 65.8 Gy (<0.05). The responsive rates were 45.8% and 74.0% (<0.05), and the rate of the elective nodal failure (ENF) was 4.2% and 11.1%, respectively. Kaplan-Meier analysis showed that the mean local-progression-free survival time was 11.0 and 15.0 months, and one-year local-failure rates were 51.9% and 24.5% (<0.05). The median overall survival time was 13.0 and 15.0 months, respectively ( = 0.084). The one-year survival rates were 55.7% and 72.5%, and two-year survival rates were 0% and 19.9%. There was no significant difference in the occurrences of radiation-associated complications between the two groups. Our results showed that omitting elective nodal irradiation did not result in a high incidence of elective nodal failure. On the contrary, it decreased local failure by increasing prescription doses to the primary diseases and lymphadenopaphy, and thereby it may further prolong the patients survival.

关键词: significant difference     irradiation     unresectable non-small-cell     induction chemotherapy     influence    

Correlative investigation of copper/low-density polyethylene nanocomposite on the endometrial angiogenesis in rats

LI Jianxiong, LIU Zilong, DUAN Yonggang, YU Jing, ZHU Changhong, LI Shuang, XIE Changsheng

《医学前沿(英文)》 2007年 第1卷 第4期   页码 401-404 doi: 10.1007/s11684-007-0078-3

摘要: The purpose of this study was to investigate the effects of copper/low-density polyethylene nanocomposite (nano-Cu/LDPE) on the endometrial angiogenesis in rats, and 100 sexual mature female SD rats were randomly divided into five groups: sham-operation groups (SO group, = 20), bulk copper groups (Cu group, = 20), LDPE groups ( = 20), nano-Cu/LDPE groups I ( = 20) and II ( = 20). The levels of angiopoietin-2 (Ang-2), its receptor (Tie-2) and CD34 of the rats endometria in each group were examined by using the S-P method of the immunohistochemistry 30 and 180 days after insertion, respectively. Compared with those in the SO group, the expression of Ang-2 and Tie-2 in all the experimental groups was obviously increased 30 days after insertion, and these parameters in nano-Cu/LDPE groups, except for Ang-2 level in nano-Cu/LDPE group II, were significantly lower in comparison with those in Cu group (<0.05). On the 180th day after insertion, Ang-2 and Tie-2 levels were still higher in Cu group and LDPE group, but there was no difference of Ang-2 and Tie-2 levels between nano-Cu/LDPE groups and the SO group (>0.05). Compared with those in the SO group, the significant increases in microvessel density (MVD) were observed on the 30th and the 180th day after the insertion of the bulk copper (<0.05). There was no significant difference in MVD counts before and after the insertion of nano-Cu/LDPE (>0.05). The results show that Nano-Cu/LDPE have slighter influence on the endometrial angiogenesis than bulk copper.

关键词: significant difference     female     endometrial angiogenesis     nano-Cu/LDPE     CD34    

Prokaryotic expression and purification of fusion protein HSP70-EGFP and its application in the study of dendritic cells internalization antigen

QU Ping, SUI Yanfang, MA Jiahai, CHEN Guangsheng, LIU Libing, CHEN Jiankang, LIU Fang'e

《医学前沿(英文)》 2008年 第2卷 第1期   页码 82-86 doi: 10.1007/s11684-008-0015-0

摘要: To study the endocytic activity of dendritic cells (DCs) by obtaining fusion protein HSP70-EGFP as exogenous antigen and loading it with DCs derived from human peripheral blood. Fusion protein HSP70-EGFP was prokaryotically expressed, isolated and purified. DCs were isolated and cultured from human peripheral blood. The DCs were divided into 3 groups in the endocytic experiment. There were 10 DCs in each group. Group 1 and 2 were respectively incubated for 30 min. with HSP70-EGFP and EGFP. Group 3 was incubated with HSP70 for 30 min, and then incubated for 30 min. with HSP70-EGFP. Subsequently, 3 groups were placed in an incubator at 37°C for 0.5, 1, 2 and 24 h. Flow cytometry (FCM) was adopted to detect the amount of DCs with EGFP inside. IL-12 Eli-spot was adopted to detect the amount of DCs which secreted IL-12. There were 5 types in the experiment: LPS, inactive LPS, HSP70-EGFP, EGFP and no antigen. Fusion protein HSP70-EGFP was successfully obtained and its molecular weight was 97 000. It accounted for 35.32% of the total protein. Under irradiation of an ultraviolet lamp, the protein solution sent out viridescent fluorescence. The result detected by FCM indicated that after incubation for 0.5 h at 37°C, the positive rate in group 1 was 63%, while the other 2 groups were negative. After incubation for 1, 2 and 24 h at 37°C, the positive rates in the 3 groups were above 80%. The IL-12 Eli-spot examination shows that with HSP70-EGFP being loaded, the amount of DCs secreting IL-12 was 134.09 ± 31.78/10 cells, a little lower than that of DCs with LPS loaded (with the average point of 156.36 ± 15.73). There was no significant difference between the 2 groups ( < 0.01). By contrast, both of them were significantly higher than inactive LPS-(33.78 ± 1.40)/10 cells and EGFP-loaded (23.13 ± 4.57)/10 cells DC groups in the amount of DCs secreting IL-12 ( < 0.01). The results suggest that receptor-mediated phagocytosis plays a main role in the preliminary stage of DCs internalizing HSP70-EGFP. With increasing incubation time, pinocytosis begins to dominate. HSP70-EGFP may promote DCs to secret cell factor IL-12.

关键词: significant difference     irradiation     peripheral     preliminary     EGFP    

Association study on GNB3 gene polymorphism with essential hypertension in Xinjiang Uygur group

JING Jianying, WANG Dan, WANG Xiaofeng, JIN Jianzhong, JIN Li, JIAO Yi, WEN Hao, LIN Renyong

《医学前沿(英文)》 2007年 第1卷 第2期   页码 230-233 doi: 10.1007/s11684-007-0045-z

摘要: The relationship between the tenth exon C825T of G-protein β3 subunit (GNB) genetic polymorphism and hypertension in the Uygur population of China was investigated. A nested case-control study ( = 738) was carried out. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique was used to genotype GNB C825T polymorphism in 354 hypertensive (HT) and 384 normotensive (NT) Uygur subjects. The distributions of GNB C825T genotypes were CC (27.2%), TT (42.9%), and CT (29.9%) in the hypertensive subjects and CC (27.7%), TT (42.4%), CT (29.9%) in the normotensive subjects. There were no significant differences in the genotype distributions between the two groups ( = 0.0262 P = 0.99). The T allele was 51.4% in hypertensive subjects and 51.2% in normotensive subjects, which, between the two groups, was not a significant difference ( = 0.0016 P = 0.97). Further analysis shows that there is no association between C825T genotypes and age, body mass index (BMI), Glucose (GLU), Triglyceride (TG), Cholesterol (CHO), systolic blood pressure (SBP) and diastolic blood pressure (DBP). No evidence was found to suggest an association between GNB C825T polymorphism and hypertension in the Uygur population of China.

关键词: case-control     significant difference     reaction-restriction fragment     C825T polymorphism     evidence    

Erratum to: On the potential of iPhone significant location data to characterize individual mobility

《环境科学与工程前沿(英文)》 2022年 第16卷 第9期 doi: 10.1007/s11783-022-1556-1

Temperature difference-powered carbon nanotube bearings

Quanwen HOU, Bingyang CAO, Zengyuan GUO

《能源前沿(英文)》 2011年 第5卷 第1期   页码 49-52 doi: 10.1007/s11708-010-0111-0

摘要: Molecular dynamics simulations are conducted to study the motion of carbon nanotube-based nanobearings powered by temperature difference. When a temperature difference exists between stator nanotubes, the rotor nanotubes acquire a higher temperature, which arises from the interaction between phonon currents and nanotubes. The thermal driving force increases with the increase in temperature difference between the stators, an increase that is nearly proportional to the temperature difference. Confined by the minimum energy track, the (5, 5)@(10, 10) nanotube bearings only translate along the axis direction but without successive rotation.

关键词: temperature difference-induced motion     carbon nanotubes     nanobearing     molecular dynamics simulation    

On the potential of iPhone significant location data to characterize individual mobility for air pollution

《环境科学与工程前沿(英文)》 2022年 第16卷 第5期 doi: 10.1007/s11783-022-1542-7

摘要:

● We evaluated the accuracy of iPhone data in capturing time-activity patterns.

关键词: Air pollution exposure     Human mobility     iPhone     Significant Location     Smartphone data    

类差分平衡函数的性质及其应用

张文英,李世取

《中国工程科学》 2004年 第6卷 第3期   页码 45-52

摘要:

定义了布尔函数的类差分和类差分平衡函数,研究了类差分平衡函数的密码学性质以及构造方法。作为类差分平衡函数的应用,给出了〓上逻辑函数是完全非线性函数的充要条件,并在首先分析得到所有四元类差分平衡函数的基础上,编程搜索出〓上所有的完全非线性函数。

关键词: Bent函数     完全非线性函数     2-基展开     类差分     类自相关函数     类差分平衡函数    

Synthesis of Intermittent-Motion Linkages with Slight Difference in Length Between Links

CHEN Xin-bo, YU Zhen

《机械工程前沿(英文)》 2006年 第1卷 第1期   页码 76-79 doi: 10.1007/s11465-005-0007-6

摘要:

The design of intermittent-motion linkages using traditional methods is usually complicated. In this paper, (1) a new method for realizing intermittent motion, using linkages with a slight difference in length between links, is studied; (2) some new types of intermittent-motion linkages and their software for visual analysis and design are developed; and (3) influences of some design parameters on intermittent-motion characteristics are clarified. Results confirmed that the theory and the software are useful, making the synthesis of intermittent-motion linkages clear and easy.

关键词: synthesis     useful     intermittent     intermittent-motion     traditional    

标题 作者 时间 类型 操作

Analysis of the treatment outcomes of esophageal variceal bleeding patients from multiple centers in China

WANG Zhiqiang

期刊论文

Effect of oxytocin on gastric ischemia-reperfusion injury in rats

ZHANG Wenwen, ZHANG Jianfu, ZHANG Yongmei, XU Ming

期刊论文

Effect of intestinal ischemia/reperfusion injury on leptin and orexin-A levels

LIN Ji, YAN Guangtao, HAO Xiuhua, ZHANG Kai, GAO Xiaoning, LIAO Jie

期刊论文

Clinical study on the related markers of blood coagulation in the patients with ANFH after SARS

WU Lianhua, GAO Chunjin, WANG Guozhong, YANG Lin, HOU Xiaomin, GE Huan, XIA Chengqing, QI Man

期刊论文

Abnormal glycosylated hemoglobin as a predictive factor for glucose metabolism disorders in antipsychotic treatment

XU Leping, JI Juying, DUAN Yiyang, SHI Hui, ZHANG Bin, SHAO Yaqin, SUN Jian

期刊论文

Observations on pathological and histochemical changes in piglet livers infected with Taenia saginata asiatica

LINGHU Yan, ZHU Wujun, BAO Huai′en, CHEN Yan

期刊论文

Improved local control without elective nodal radiotherapy in patients with unresectable NSCLC treated by 3D-CRT

YANG Kunyu, LIU Li, ZHANG Tao, WU Gang, CAO Fengjun, WANG Jianhua

期刊论文

Correlative investigation of copper/low-density polyethylene nanocomposite on the endometrial angiogenesis in rats

LI Jianxiong, LIU Zilong, DUAN Yonggang, YU Jing, ZHU Changhong, LI Shuang, XIE Changsheng

期刊论文

Prokaryotic expression and purification of fusion protein HSP70-EGFP and its application in the study of dendritic cells internalization antigen

QU Ping, SUI Yanfang, MA Jiahai, CHEN Guangsheng, LIU Libing, CHEN Jiankang, LIU Fang'e

期刊论文

Association study on GNB3 gene polymorphism with essential hypertension in Xinjiang Uygur group

JING Jianying, WANG Dan, WANG Xiaofeng, JIN Jianzhong, JIN Li, JIAO Yi, WEN Hao, LIN Renyong

期刊论文

Erratum to: On the potential of iPhone significant location data to characterize individual mobility

期刊论文

Temperature difference-powered carbon nanotube bearings

Quanwen HOU, Bingyang CAO, Zengyuan GUO

期刊论文

On the potential of iPhone significant location data to characterize individual mobility for air pollution

期刊论文

类差分平衡函数的性质及其应用

张文英,李世取

期刊论文

Synthesis of Intermittent-Motion Linkages with Slight Difference in Length Between Links

CHEN Xin-bo, YU Zhen

期刊论文