θmax较大时CPC装置的性质研究

指出了复合抛物面聚光集热器在θmax较大时的应用价值，计算了θmax较大时复合抛物面聚光集热器的聚光比、高度比等。     

葡萄粒分选装置的试验研究

论述了一种新型葡萄粒分选装置。该装置简单、实用，且对其它类似的小型果子的分选具有较大的参考价值     

对合成反应体系放出的有害气体吸收置的改进（一）

在有机物合成实验中，常会遇到伴有毒性气体产生。实验都要采取一级或多级吸收装置。但难免有部分气体向扩散。利用抽吸流引流吸收的原理，设计了反应吸收装置，使产生的有害气体，定向流往吸收瓶而被相应的吸收液所吸收，效果很好。此装置具有结构简单，取材方便，操作容易等特点。     

铁路罐车油品交接计量误差的确定方法

在石油产品的交易过程中,罐车油品交接计量及理赔是非常重要的一个环节,罐车油品计量的准确度直接影响企业的经济效益.针对低、中、高粘度油品的罐车计量误差和由计量误差产生的索赔量等问题,给出了实用计算公式.该计算公式可以准确确定罐车的实际装油量和理赔油量,有效降低企业的经济损失.     

液化石油气气相对罐内液相计量的影响

研究了液化石油气(LPG)气相对罐内液相计量的影响,对LPG计量中产生的差值进行了分析和计算,提出了以系数修正法和加装高精度计量设备来减少LPG计量误差的方法.     

立式罐底量增量研究及应用

立式罐底量变化对大批量液体计量精度的影响一直没有很好解决。通过对立式罐底量三种基本状态及增量的研究分析，提出了立式罐底板变形规律的概念，并绘出了变形规律曲线，曲线分三个区域，第Ｉ区内罐底板状态与空罐时相同，不发生任何变形，无底量增量，空罐容积表保持有效；第Ⅱ区为弹性变形区，底量增量产生且不断变化，改变液位与容量关系，空罐容积表失败；第Ⅲ区为稳定区，罐底板总体处于稳定状态，增量保持恒定，空罐容积表不     

Comparison of perioperative analgesic protocols for dogs undergoing tibial plateau leveling osteotomy

OBJECTIVE: To compare effects of 3 commonly used perioperative analgesic protocols (epidural injection, intra-articular injection, and intravenous [IV] injection) for management of postoperative pain in dogs after tibial plateau leveling osteotomy (TPLO). STUDY DESIGN: Prospective, randomized clinical trial. ANIMALS: Fifty-six healthy dogs with naturally occurring cranial cruciate ligament rupture. METHODS: Dogs were premedicated with IV hydromorphone and acepromazine and were randomly assigned to receive either E (preoperative epidural injection with morphine and bupivacaine), IA (pre- and postoperative intra-articular injections of bupivacaine), or C (neither epidural morphine and bupivacaine, nor intra-articular bupivacaine). All dogs were administered hydromorphone (0.05 mg/kg IV) at extubation and as needed to maintain comfort postoperatively. Patients were observed and monitored continuously for 24 hours and discomfort was assessed using visual analog pain scores (VASs), multifactorial pain scores (MPSs), and response to a pressure nociceptive threshold (PNT) measuring device. Time to 1st dose and the total doses of hydromorphone required to achieve adequate comfort for each dog were recorded. RESULTS: No differences in measured indices of postoperative pain were observed between dogs of each treatment group; VAS (P=.190), MPS (P=.371), and PNT (P=.160). Time to 1st analgesic intervention was longer for Group E compared with Group C (P=.005) and longer for Group IA compared with Group C (P=.032). Although time to 1st intervention between Groups E and IA were longer for Group E, differences were not significant. To provide an adequate level of comfort, more analgesic interventions were administered to dogs in Group C compared with dogs in group E (P=.015). On average, more hydromorphone was administered to Group C compared with Group IA (P=.072) and to Group IA compared with Group E (P=.168), but statistical significance was not reached for these data. CONCLUSIONS: In this study population, significant differences were seen in time to 1st hydromorphone dose between Groups E and IA compared with Group C. As well, more supplemental analgesia was administered to Group C compared with Group E to maintain the same level of postoperative comfort. Although differences between Groups E and IA tended to favor the epidural group, differences were minimal and not statistically significant. CLINICAL RELEVANCE: Our results suggest that regardless of analgesic protocol, measured indices of pain in dogs after TPLO can be minimized if dogs are continuously observed and appropriately supplemented with parenteral opioids. However, the frequency of postoperative opioid dosing can be minimized and may be a factor when contemplating supplementary use of epidural or intra-articular injections as part of a balanced analgesic approach.     

Minimally invasive per-catheter patent ductus arteriosus occlusion in dogs using a prototype duct occluder

BACKGROUND: Per-catheter patent ductus arteriosus (PDA) occlusion in dogs with devices intended for humans is associated with technical difficulties, high rates of procedure abandonment, device migration, and residual ductal flow. HYPOTHESIS: Use of a custom-made canine duct occluder (Amplatz Canine Duct Occluder, ACDO) would be feasible in dogs of varying weights and somatotypes and effective in occluding a wide range of PDA shapes and sizes. ANIMALS: Eighteen client-owned dogs of various breeds with PDA. Weights ranged from 3.8 to 32.3 kg (median, 17.8 kg), and angiographic minimal ductal diameters ranged from 1.1 to 6.9 mm (median, 3.7 mm). Ductal morphologies included types IIA, IIB, and III. METHODS: Per-catheter PDA occlusion with the ACDO was performed in all dogs. Persistent or recurrent ductal flow was assessed at the end of the procedure by angiography and at 1 day, 3 months, and >or=12 months after the procedure by echocardiography. RESULTS: Successful ACDO placement was achieved in all 18 dogs. One dog required a 2nd procedure with a larger ACDO after the 1st device migrated to the pulmonary vasculature. Complete occlusion was confirmed in 17 of 18 dogs during the procedure, as well as at 1 day and 3 months after the procedure, and in 12 of 13 dogs evaluated at >or=12 months after the procedure. CONCLUSIONS AND CLINICAL IMPORTANCE: Per-catheter PDA occlusion in dogs with the ACDO is feasible and effective in dogs of a wide range of weights and somatotypes and with PDAs of varying shapes and sizes.