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QINGZHOU, SHANDONG, CHINA, March 4, 2026 /EINPresswire.com/ — As global ports continue to expand and maintenance dredging requirements grow more complex, contractors are demanding equipment that delivers precision, power, and operational flexibility. In this evolving market, the Harbor backhoe dredger offered by China heavy-machinery factories has gained increasing attention for its ability to handle tough harbor sediments and confined working areas. Among the manufacturers driving this segment forward, Qingzhou Yongli Mining And Dredging Machinery Co., Ltd. (YONGDELI) has built a strong reputation through continuous engineering refinement and a comprehensive heavy-industry manufacturing system.
Located in Qingzhou City, Shandong Province—historically known as one of China’s ancient nine states—YONGDELI operates as a professional manufacturer and supplier integrating scientific research, development, design, production, installation, commissioning, and personnel allocation services. The company’s harbor backhoe dredgers reflect its broader commitment to delivering robust, application-focused dredging solutions for global marine infrastructure projects.

Rising Demand for High-Precision Harbor Dredging
Modern harbor maintenance is no longer limited to simple sediment removal. Port authorities and marine contractors now require dredging equipment capable of working in highly controlled environments where accuracy and stability are critical. Key application scenarios include:
Berth deepening and maintenance
Quay wall cleaning
Basin desilting
Hard soil and compacted sediment removal
Confined port construction zones
Backhoe dredgers are particularly well suited for these tasks due to their excavator-style digging precision and strong breakout force. YONGDELI has focused on optimizing these performance characteristics to meet the increasingly demanding requirements of port operators worldwide.

Structural Engineering Designed for Heavy-Duty Harbor Work
One of the defining features of YONGDELI harbor backhoe dredgers is their reinforced structural design. Unlike standard floating excavators, these machines are purpose-built for marine environments where continuous heavy loading is common.
Reinforced Hull and Working Platform
YONGDELI engineers have strengthened the pontoon structure and deck layout to ensure long-term durability under harsh operating conditions. Key benefits include:
Enhanced load-bearing capacity
Improved resistance to torsional stress
Stable working platform during excavation
Extended service life in corrosive environments
This heavy-duty structural approach is particularly valuable in ports where dredgers must operate continuously under high production pressure.
Optimized Weight Distribution
Proper weight balance is critical for safe dredging operations near quay walls and infrastructure. YONGDELI’s design team carefully calculates the center of gravity and buoyancy distribution to ensure:
Reduced pitching and rolling
Improved digging accuracy
Better operational safety
Consistent performance in varying water depths
This optimization helps operators maintain precise bucket positioning even in challenging harbor conditions.

Powerful Excavation Performance
Performance is ultimately measured by digging efficiency and reliability. YONGDELI’s harbor backhoe dredgers are engineered to deliver strong excavation capability across a wide range of sediment types.
High Breakout Force
The hydraulic system and boom structure are designed to generate substantial breakout force, enabling effective handling of:
Compacted silt
Clay layers
Sand and gravel mixtures
Moderately hard seabed materials
This capability reduces the need for pre-treatment or auxiliary loosening equipment in many projects.
Precision Bucket Control
Harbor projects often require selective dredging near sensitive structures. YONGDELI machines feature responsive hydraulic control systems that allow operators to:
Perform accurate depth control
Minimize over-dredging
Reduce material disturbance
Improve environmental compliance
This precision is a key reason backhoe dredgers remain preferred for berth and quay maintenance.

Hydraulic and Power System Efficiency
YONGDELI emphasizes hydraulic reliability and fuel efficiency to support long working cycles typical in port projects.
Key system advantages include:
Stable hydraulic output under heavy load
Smooth multi-action coordination
Energy-efficient power matching
Reduced heat buildup during continuous operation
These improvements help contractors maintain productivity while controlling operating costs—an increasingly important factor in competitive dredging contracts.

Versatility Across Marine Applications
Although primarily designed for harbor work, YONGDELI’s backhoe dredgers are built with multi-application flexibility in mind. Typical use cases include:
Port and harbor maintenance
Inland waterway dredging
River regulation projects
Coastal engineering support
Sand and sediment removal
Infrastructure construction support
The machines can be configured with different bucket sizes and optional attachments, allowing customers to adapt the equipment to specific project requirements.

Comprehensive Manufacturing and Quality Assurance
Behind the performance of every YONGDELI dredger is a rigorous manufacturing and quality control framework. The company has been recognized as a High and New Technology Enterprise and maintains multiple layers of certification and compliance.
YONGDELI holds:
Class III Grade Three Shipbuilding Production License from CCS China Classification Society
ISO9001:2015 Quality Management System Certification
Membership in the China Dredging Association
Membership in the Shandong Shipbuilding Industry Association
More than 30 invention and utility model patents
In addition, Yongli series products have been verified by internationally recognized testing organizations such as SGS and BV. These credentials demonstrate the company’s commitment to meeting global performance and safety expectations.

Integrated Product Ecosystem
While harbor backhoe dredgers are a key product line, YONGDELI offers a full spectrum of dredging and mining equipment, including:
Cutter suction dredgers
Bucket wheel dredgers
Jet suction dredgers
Siphon sand dredgers
Drilling suction sand dredgers
Bucket chain sand dredgers
Amphibious dredgers
Multifunctional work boats
Self-suction and self-unloading barges
Transport barges
Sand sieving and washing equipment
The company also supplies floating production platforms, gold and diamond dredgers, land-use washing plants, and integrated mineral processing lines for both water and land operations. This one-stop capability allows clients to streamline procurement for complex projects.

Global Service and Customer Support
YONGDELI complements its engineering strengths with a comprehensive after-sales support system designed for international customers. Services include:
Technical consultation before purchase
Installation and commissioning guidance
Operator training programs
Spare parts supply
Remote troubleshooting
Personnel allocation support when required
This lifecycle service model helps ensure that customers achieve stable long-term performance from their dredging equipment.

Outlook for Harbor Dredging Solutions
With global port modernization accelerating and maintenance dredging becoming more technically demanding, the need for precise, durable backhoe dredgers is expected to remain strong. Equipment buyers are increasingly prioritizing manufacturers that combine heavy-industry manufacturing strength with customization flexibility and reliable service.
Through continuous engineering improvement, strict quality control, and customer-focused solutions, Qingzhou Yongli Mining And Dredging Machinery Co., Ltd. has positioned its harbor backhoe dredgers as competitive options in the international market.
The company remains committed to integrity, mutual benefit, and common development, and welcomes partners worldwide to visit for factory inspection and business cooperation.
For more information, visit: www.yonglidredger.com

QINGZHOU YONGLI MINING AND DREDGING MACHINERY CO.,LTD
QINGZHOU YONGLI MINING AND DREDGING MACHINERY CO.,LTD
+ +8613791879703
leo@chinadredgers.com

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ZIBO, SHANDONG, CHINA, March 4, 2026 /EINPresswire.com/ — The global construction industry is currently navigating a pivotal shift toward higher material performance and stringent safety regulations. Central to this evolution is the role of advanced chemical additives that ensure structural integrity and efficiency. Kima Chemical Co., Ltd. has addressed these demands by expanding its output as a Professional HPMC Factory in China. Hydroxypropyl Methylcellulose (HPMC), a non-ionic cellulose ether produced from natural polymer cellulose through a sophisticated series of chemical processing steps, has become a cornerstone in modern building chemistry. The product provides vital functions such as water retention, thickening, and workability, which are essential for the stability of dry-mix mortars, cement-based renders, and various adhesive applications.

The Trajectory of the Global Construction Chemical Industry
The international construction landscape is witnessing a transition from traditional onsite mixing to the use of factory-controlled, pre-mixed materials. This change is driven by the need for consistency and the reduction of human error on construction sites. As building projects become more complex, the reliance on high-performance chemical additives has grown exponentially.
Market trends indicate that the demand for cellulose ethers, specifically HPMC, is linked directly to the growth of energy-efficient building solutions. For instance, the widespread adoption of External Thermal Insulation Composite Systems (ETICS) across Europe and Asia requires additives that can manage the mechanical stress of temperature fluctuations while maintaining strong adhesion. Furthermore, the global push for sustainable infrastructure has led to a preference for materials that are derived from renewable sources, such as the natural cellulose utilized in Kima Chemical’s production lines.
In developing urban centers, the shift toward high-rise construction and large-scale infrastructure has necessitated materials that offer extended “open time”—the duration a material remains workable after application. This technical requirement has moved the industry focus toward manufacturers capable of producing high-purity, stable chemical compounds that perform reliably under diverse climatic conditions. The industry’s future is defined by this intersection of chemistry and structural engineering, where the precision of the additive determines the longevity of the final build.

Manufacturing Precision and Technical Standards in China
Operating as a professional manufacturing entity, Kima Chemical Co., Ltd. has established production protocols that align with international quality management systems. The facility utilizes advanced etherification technology to transform raw cellulose into HPMC grades that meet specific viscosity and purity requirements. By maintaining a centralized production base, the factory ensures that the chemical properties of each batch remain uniform, a critical factor for large-scale industrial consumers who require predictable results in their own manufacturing processes.
The technical infrastructure at the factory includes comprehensive laboratory testing for parameters such as ash content, pH value, and moisture displacement. These metrics are not merely internal benchmarks but serve as the standard by which the international market measures the reliability of a Chinese chemical supplier. By adhering to ISO 9001 standards, the organization demonstrates a commitment to operational transparency and product consistency. This focus on manufacturing excellence allows for the creation of various grades of HPMC, categorized by their viscosity—ranging from low viscosity for self-leveling floors to high viscosity for heavy-duty tile adhesives.

Primary Product Applications and Scenario Analysis
The application of HPMC produced by Kima Chemical extends across several key sectors within the building and industrial markets. Understanding these scenarios illustrates why high-standard HPMC is vital for modern construction:
Dry-Mix Mortar and Plasters: In these applications, HPMC acts as a water-retaining agent. It prevents the water from being absorbed too quickly by the substrate or evaporating, which ensures the cement has enough time to hydrate and gain strength. This reduces the risk of cracking and shrinkage.
Tile Adhesives and Grouts: For tile installation, particularly with non-porous ceramic or large-format stones, HPMC provides the necessary “slip resistance.” It allows the tile to be placed on a vertical surface without sliding, while also providing enough “open time” for adjustments.
Self-Leveling Compounds: The additive helps in maintaining the fluidity and water retention of the floor mix, ensuring a smooth, level finish without the sedimentation of heavier aggregates.
Paint and Coatings: Beyond structural use, HPMC serves as a stabilizer and thickener in water-based paints, improving the brushability and shelf-life of the product.
Detergent and Personal Care: Due to its non-toxic nature and thickening properties, specific grades are also utilized in the production of liquid detergents and cleaning agents.

Client Case Studies and Global Supply Integration
The effectiveness of Kima Chemical’s HPMC is evidenced by its integration into diverse global projects. In high-temperature regions, where traditional mortars often fail due to rapid dehydration, the high water-retention grades of HPMC have enabled contractors to maintain structural standards without increasing labor costs.
For example, industrial clients in the Middle East and Southeast Asia have utilized Kima Chemical’s products to formulate premium wall putties that require high workability and a smooth finish. By using a consistent grade of HPMC, these manufacturers were able to reduce the percentage of re-work required on large-scale residential developments. Furthermore, European distributors have increasingly sought out China-based production that meets strict environmental regulations, finding that the purification processes employed at the Kima facility meet the necessary chemical safety criteria for import.
The ability to provide Technical Data Sheets (TDS) and Material Safety Data Sheets (MSDS) that correspond accurately to the chemical composition of the shipped product has allowed the factory to build long-term relationships with multinational chemical distributors. This transparency is a key differentiator in a market where technical accuracy is as important as the chemical itself.

Conclusion
The elevation of construction standards is a collaborative effort between engineering design and chemical innovation. As a professional HPMC factory in China, Kima Chemical Co., Ltd. plays a vital role in this ecosystem by providing the essential additives that allow modern materials to perform under pressure. Through rigorous adherence to manufacturing standards, a focus on the evolving trends of the global construction market, and a commitment to technical transparency, the company ensures that its products contribute to the safety and durability of infrastructure worldwide. As the industry continues to move toward more specialized and sustainable building solutions, the precision of cellulose ether production will remain a fundamental factor in the success of global construction projects.
For further information regarding product specifications, laboratory testing results, or industrial applications, please visit the official website: https://www.kimachemical.com/

Kima Chemical Co.,Ltd
Kima Chemical Co.,Ltd
+86 15169331170
sales@kimachemical.com

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GA, UNITED STATES, March 4, 2026 /EINPresswire.com/ — Expectiles are a coherent and elicitable alternative to commonly used market risk measures, but practical backtesting tools have lagged behind. This study proposes new backtests that separate unconditional coverage from independence in expectile forecasts. By connecting a Wald-testing framework to Box–Pierce-style autocorrelation testing under a location-scale setting, the authors develop tests with improved finite-sample behavior in simulations and demonstrate their use on S&P 500 return data.

Financial institutions routinely forecast market risk, and regulators require those forecasts to be backtested—checked against what actually happens. Two widely used risk measures, Value-at-Risk (VaR) and Expected Shortfall (ES), come with well-known drawbacks: VaR is not coherent, and ES is not independently elicitable. Expectiles have attracted growing interest because they are “the only law-invariant risk measure that is both coherent and elicitable”; however, their backtesting has received less attention.

In a new study published in Risk Sciences, a team of researchers from Canada and the UK developed new backtesting approaches for expectile forecasts designed to address problems in existing methods, including size distortion and low test power. The central idea is to disentangle two properties that are often assessed separately for VaR/ES models: unconditional coverage (whether the forecasts are right on average) and independence (whether forecast errors show problematic time dependence).

“We wanted to introduce novel expectile backtests with better size and power properties,” shares corresponding author Yang Lu. “For unconditional coverage, we used a simplified Wald-style test focusing on a single unconditional expectation condition to reduce distortion.”

For independence, the team linked the general Wald-testing framework to the popular Box–Pierce lack-of-autocorrelation test, and—under a location-scale specification of returns—construct candidate i.i.d. sequences that allow Box–Pierce-style tests to be applied appropriately.

“Simulation studies indicated promising finite-sample performance for the proposed tests, and an empirical application illustrates how the approach can be used on S&P 500 return data,” adds Lu. “Nonetheless, we noted that the independence-testing construction relies on a location-scale framework and may be less suitable under certain alternative data-generating mechanisms (e.g., stochastic volatility settings).”

References
DOI
10.1016/j.risk.2026.100051

Original Source URL
https://doi.org/10.1016/j.risk.2026.100051

About Risk Sciences
Risk Sciences is a general-interest journal that publishes academic research and industry practices on risks and disruptive technologies across all fields including agriculture, economics, engineering, environmental science, finance, health, law, management, natural sciences, and public administration.

Lucy Wang
BioDesign Research
email us here

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Linda Roberts-Betsch brings young readers a heartwarming story that teaches children about birds, responsibility, and the joy of discovery.

NEW YORK CITY, NY, UNITED STATES, March 3, 2026 /EINPresswire.com/ — Author Linda Roberts-Betsch invites children and families into a gentle and educational adventure with her beloved book, The Day the Birds Came Calling. Centered on the curiosity and compassion of two young siblings, the story offers an engaging introduction to the natural world while highlighting the importance of respect for wildlife.

The story follows eight year old Kiki, who discovers a special secret nestled within a wreath on her family’s front door. As a proud big sister to six year old Kip, Kiki decides to share her discovery with him. Together, they uncover a bird’s nest carefully built in the wreath, sparking excitement, questions, and a shared sense of responsibility. What begins as a simple discovery soon becomes a meaningful family experience.

As Kiki and Kip observe the nest, they involve their parents in protecting the birds and ensuring the family’s daily routine does not disturb the tiny visitors. Even the household’s three little dogs become part of the careful adjustments the family makes. Through these changes, young readers see firsthand how small actions can make a big difference in protecting wildlife.

The learning extends beyond the home. Kiki and Kip proudly share their discovery with their classmates and teachers, introducing new vocabulary such as hatchlings, nestlings, and fledglings. Through these classroom discussions, children gain insight into how birds build nests, care for their young, and the important roles both female and male birds play in raising their families.

Inspired by real life observations and a desire to nurture curiosity in young minds, Roberts-Betsch crafted this story to encourage children to slow down and appreciate the world around them. The narrative emphasizes patience, kindness, and respect for living creatures, while also celebrating sibling bonds and family teamwork.

Linda Roberts-Betsch is an author dedicated to creating stories that inspire learning and connection. With The Day the Birds Came Calling, she delivers a warm and accessible tale that educators and parents can use to spark conversations about nature, responsibility, and compassion.

The book is now available — secure your copy here: https://a.co/d/02uNm4jr.

For review copies, interview requests, or additional information, please contact:

Linda Roberts-Betsch
BrightKey PR
lrobertsbe@comcast.net

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EIN Presswire provides this news content “as is” without warranty of any kind. We do not accept any responsibility or liability
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